Protein fusion constructs possessing thrombolytic and anticoagulant properties

SEQUENCE LISTING SUBMISSION VIA EFS-WEB

A computer readable text file, entitled "102082-5002_SequenceListing.txt," created on or about 23 Sep. 2013, with a file size of about 160 kb contains the sequence listing for this application and is hereby incorporated by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to thrombolytic drugs which include chimeric fusion proteins comprising a thrombolytic protein and the 4, 5, 6 epidermal growth factor-like domains (EGF 4,5,6) of thrombomodulin. The inventive fusion proteins possess plasminogen activation, thrombin inhibition, and anticoagulant protein C pathway activation activity. The inventive fusion proteins have therapeutic potential to break up thrombi and prevent reocclusion at the site of the clot.

BACKGROUND OF THE INVENTION

Thrombosis, the formation and development of a blood clot or thrombus within the vascular system, while a life saving process when it occurs during a hemorrhage, can be life threatening when it occurs at any other time. The thrombus can block a vessel and stop blood supply to an organ or other body part. If detached, the thrombus can become an embolus and occlude a vessel distant from the original site. Thrombotic disorders now constitute one of the major causes of mortality in both developing and developed countries world-wide. Although still the most preferred emergency ("SOS") medication against thrombotic circulatory disorders, the plasminogen activator protein drugs, such as streptokinase (SK), staphylokinase (SAK) and tissue plasminogen activator (tPA), are slowly losing their supremacy to emergency cardiac interventions such as stenting and bypass surgeries in the affluent countries because of bleeding risks associated with their use, and also the often-encountered problem of clot reformation at the same site of vascular injury due to thrombin activity and/or fresh generation of thrombin. Thus, there is an acute need to develop smarter and more effective thrombolytic drugs with additional features such as clot specificity and anti-thrombotic properties.

Blood clot formation is an end-result of a complex set of cascade reactions wherein several biochemical events cause the sealing, or repair, at the site of injury (Butenas and Mann 2002). On the basis of initiation of the blood coagulation cascade, pathways have been divided into extrinsic and intrinsic pathway, wherein the extrinsic pathway is initiated by the exposure of tissue factor (TF), whereas the intrinsic pathway is initiated by factor XII (Hageman factor), high molecular weight kininogen (HK), or prekallikrain. However, both cascade pathways ultimately join at the point of factor Xa generation, and subsequently follow common thrombin mediated fibrin generation (Cannon and Tracy 1995).

Thrombin generation is the central step of the blood coagulation process in vertebrates. During the thrombin generation process small amount of thrombin gets incorporated into the fibrin clot/network as it expands, and the catalytic site of this protease, being free in this absorbed thrombin, is able to amplify the clot growth (Liu, Nossel et al. 1979; Vali and Scheraga 1988). Thrombin interacts with diverse substrates and activates several clot promoting factors e.g. (a) it causes the activation of platelets by cleaving their cognate receptors (b) causes feed-back activation of factor V, VIII and XI (c) cause the activation of transglutminase, factor XIII and (d) converts fibrinogen into fibrin. Once the clot forms and stabilizes by inter-strand cross-linking, under the pathological conditions, it impedes the normal blood flow in vessels and leads to blockage of arteries and veins.

One of the most common, and preferred, medications against circulatory disorders emanating from pathological thrombus formation in animals/humans such as myocardial infarction, is the intravenous infusion of thrombolytic agents (Lijnen and Collen 1988; Collen and Lijnen 1990; Francis and Marder 1991). Available thrombolytics such as streptokinase (SK), urokinase (UK) and tissue type plasminogen activator (tPA) essentially operate through the same, plasmin-dependent mechanism (since these are plasminogen activators), where these cleave the scissile peptide between residues 561 and 562 of plasminogen and convert it into its proteolytically activated form, plasmin. Tissue type plasminogen activator and urokinase are proteases that specifically recognize the scissile peptide bond in human plasminogen (direct activators), whereas streptokinase and staphylokinase (which are protein `co-factors` rather than proteases and thus `indirect` activators; (see: (De Renzo, Boggiano et al. 1967; Buck, Hummel et al. 1968; McClintock and Bell 1971) first make tight 1:1 complexes with plasmin or plasminogen, and the resultant proteolytically active complex(es) cleave the scissile peptide bond of other, `free` plasminogen molecules and exponentially generate plasmin (Reviewed by: (Wohl, Summaria et al. 1978; Castellino and Powell 1981; Wohl, Sinio et al. 1983; Davidson, Higgins et al. 1990). Of all the currently available clot-busters, that is, plasminogen activator protein drugs, streptokinase exhibits the highest thrombolytic power, although, being (like SAK) of bacterial origin, it has the limitation of engendering immune reactions in a small minority of patients. Nevertheless, it is widely used as an affordable thrombolytic because of its relatively low cost as compared to tPA and UK.

Successful thrombolytic therapy helps maintain normal blood flow and improves the survival in a significant number of patients (Verstraete 1990), but early re-occlusion or re-thrombosis, often at the same site, has continued to limit the successful application of thrombolytic drugs. Several studies demonstrate that early reocclusion occurs in up to 30% of patients after thrombolytic therapy (Ohman, Califf et al. 1990). The cause of rethrombosis or early reocclusion is explained by plasmin activity which increases the hyper coagulability of blood (Eisenberg, Miletich et al. 1988); it is proposed that plasmin activates contact factors (Ewald and Eisenberg 1995), factor V (Lee and Mann 1989) and likely also prothrombin (Seitz et al., 1993). Another suggested reason is the exposure of clot-bound thrombin subsequent to the latter's dissolution, which, in turn, generates more thrombin, with fibrin-bound thrombin being relatively resistant to anti-thrombin inhibitor/s (Hogg and Jackson 1989; Weitz, Hudoba et al. 1990); the `released` thrombin again locally activates the procoagulant activity and starts to activate platelets (Kumar, Beguin et al. 1994; Puri, Kumar et al. 1995), thereby promoting a cycle of biochemical events leading to rethrombosis. Thus, inhibition of the thrombin at the site of injury both directly, and at the `secondary` level of its procoagulant activity, should greatly thwart the above-described, unwanted chain of events. If such a property is integrated successfully in the same molecule as the thrombolytic drug, the advantages in terms of lives saved are obvious.

Plasminogen activators are a family of proteases which characteristically catalyse the enzymatic conversion of plasminogen to plasmin. TPA the enzymatic conversion of plasminogen to plasmin through the hydrolysis of a single Arginine-Valine bond.

Tissue plasminogen activator (also known as fibrinokinase, extrinsic plasminogen activator, t-PA or TPA) is a glycoprotein and has an approximate molecular weight (MW) of about 70,000 Daltons (68,000 Daltons). It is a serine protease which catalyses the enzymatic conversion of pro-enzyme plasminogen to active enzyme plasmin through the hydrolysis of a single Arginine-Valine bond. The catalytic site of t-PA is composed of amino acids His-322, Asp-371 and Ser-478. t-PA is a poor plasminogen activator in the absence of fibrin. The amino-terminal region is composed of several domains, which are homologous to other proteins. These distinct domains are involved in several functions of the enzyme, including binding to fibrin, fibrin-specific plasminogen activation, binding to endothelial cell receptors and rapid clearance in vivo. One such domain, comprising amino acid residues 50 to 87 (E domain) is homologous to Human Epidermal Growth Factor and seems to be involved in fibrin binding, fibrin affinity and in vivo clearance. The t-PA cDNA was cloned and subsequently expressed in Chinese hamster ovary (CHO) cells.

Tissue plasminogen activator (t-PA) is a component of the mammalian fibrinolytic system responsible for the specific activation of plasminogen associated with fibrin clots (i.e. it is capable of dissolving blood clots). Tissue plasminogen activator-mediated clot dissolution shows increased level of fibrinopeptide-A in plasma, which is a direct marker of clot-bound thrombin (Weitz, Leslie et al. 1998). A combination of tissue plasminogen activator and currently known anti-thrombin drugs such as heparin and hirudinis often used in medication but this anti-thrombin acts only on free thrombin, and the clot-bound thrombin is resistant towards heparin and other the inhibitors due to their low affinity. Besides, these drugs do not affect the indirect promoters of further thrombin generation (e.g. Factor V and Factor VIII). Hence, new chimeric proteins need to be designed which activate plasminogen along with inhibition of clot bound thrombin as well as the indirect promoters of thrombin, such as Factor V and Factor VIII.

Work on post-thrombolytic plasmin activity and consequent thrombin generation clearly suggests that there are potent factors which lead to the re-activation of the coagulation pathway even when the pathological clot has been cleared by a clot-buster drug. In addition, the generated thrombin is itself a potent coagulation pathway activator. It is remarkable that thrombin also performs an anti-coagulant function, which is an elegant example of the "self-limiting" control mechanisms of the hemostasis system such that there is no `run away` coagulation throughout the vasculature. Free thrombin makes a 1:1 high-affinity, non-covalent complex with thrombomodulin, a cell surface protein (Kurosawa, Galvin et al. 1987). Once the thrombin-thrombomodulin complex is formed its substrate specificity is redirected from a pro-coagulant mode to an anti-coagulant one, whereby it activates the Protein C anticoagulant pathway. Thus, even though thrombin alone can activate protein C but once it complexes with thrombomodulin it accelerates protein C activation by nearly a 1000-fold (Esmon and Owen 1981; Owen and Esmon 1981)).

Mature thrombomodulin contains different domains responsible for different functions, namely thrombin inhibition and protein C activation which reside in the epidermal growth factor-like domains of this large protein. Epidermal growth factor-like (EGF) domains 5 and 6 are responsible mainly for thrombin affinity and EGF 4, 5 and 6 domains, activate protein C together (Kurosawa, Stearns et al. 1988; Stearns, Kurosawa et al. 1989). Thrombomodulin, or its isolated EGF domains 4, 5 and 6, are known to activate the protein C-centered anticoagulant pathway, and also directly inhibit thrombin's activity, but cannot dissolve the fibrin clots by themselves. For this, a thrombolytic agent is necessary. Both types of agents can, independently of each other, be used during cardiac thrombotic maladies, but the advantages of a single drug with both types of attributes (which has not been demonstrated so far) are obvious.

The term `hemostasis` refers to the balance between anticoagulant and procoagulant activities in the blood/vascular system, wherein normally, the blood components, particularly platelets, do not interact abnormally with the blood vessels' inner lining. In case of injury or disease condition, platelets tend to adhere, and as a result, blood coagulation factors start to accumulate and get activated at the site of this injury, which, although a response to initiate repair at the site of injury, results in blood occlusion, thereby often precipitating thrombotic crises.

Blood coagulation and dissolution of a clot, inside blood vessels, are both necessary physiological processes for normal hemostasis. Clot formation and dissolution mechanisms inside the blood vessel are well known in the literature, and the role of different pro-coagulant proteins (clot promoting) and anti-coagulant proteins are now fairly also well-studied. Clot formation is the result of a complex set of reactions wherein thrombin plays a central role in initiation as well as coagulation cascade acceleration, with the end-result appearing in the form of a stable fibrin mesh.

Every modern thrombolytic/fibrinolytic therapy usually combines an anti-thrombotic medication as well (such as aspirin, heparin etc) which is required for the maintenance of normal equilibrium between the pro-coagulants and anti-coagulants during the clot lysis. During lysis, the transiently released thrombin initiates a self-generation loop to amplify clot growth; sometimes this results in a shift of the equilibrium towards the reformation of clot, or activation of the pro-coagulants/clot promoters.

Thrombolytics dissolve pathological clots by activating intrinsic plasminogen in the circulatory system. Among the available and therapeutically useful thrombolytics, streptokinase exhibits the highest thrombolytic potential but sometimes it leads to hemorrhage during the medication because of a lack of clot specificity. This problem is relatively less associated with other thrombolytics (tPA and SAK) because of their relatively increased fibrin clot specificity, but other shortcomings of these thrombolytics are lesser fibrinolytic potential and shorter in vivo half life. All the thrombolytics have essentially same mechanism of thrombolysis (plasminogen activation), but share a common problem, in that that after thrombolysis the generated thrombin often further amplifies thrombin generation by a feed-back mechanism controlled by blood coagulation factor Va and factor VIIIa. In the thrombolysis process, the clot-bound thrombin is also released into the circulation which is relatively resistant to in-built anti-thrombin and other externally provided thrombin inhibitory drugs. This clot-bound thrombin, present at the near vicinity of the `original` injury also helps to generate even more thrombin in the vicinity of the clot/site of injury, particularly after incomplete removal of clot, which leads to the clinically grave, early re-occlusion problem.

Thombin generation during the lysis and activation of other intrinsic pro-coagulants is a normal part of the hemostasis equilibrium. Anti-thrombin agents like heparin, hirudin and chemically synthesized drugs can inhibit thrombin and prevent its subsequent transient effects, like suppression of hyper-responsive platelet formation process, inhibition of fibrinogen to fibrin conversion and other clot promoting activities which induces hyper-coagulibility in blood. Notably, however, all these direct inhibitors act on transiently generated thrombin, but not on those factors which actually speed up thrombin generation and play key roles in the procoagulant pathway. Thus, none of these drugs acts as efficaciously as desired on blood coagulation factors V and VIII, which play crucial role in thrombin generation and early re-occlusion.

The well-known cell surface molecule thrombomodulin, which makes 1:1 complexes with thrombin and directs its pro-coagulant function into a potent anti-coagulant, namely protein C activator. Both activated protein C and protein S degrade activated factor V and factor VIII (Esmon 1989).

Although all available thrombolytics do possess clot dissolving capability and their mechanism is well evident in literature, but during clot lysis, remnants of clot and plasmin lead to thrombin generation; at the same time, since these agents cannot inactivate the thrombin which makes a transient appearance during thelysis of the clot, the result is that reocclusion is a common problem subsequent to thrombolytic therapy. To date, no anti-thrombin drugs are available with a combination of thrombolytic and anti-thrombin properties, especially the pro-coagulant activity so as to inactivate the `real culprit` which is chiefly responsible for re-thrombosis.

SUMMARY OF THE INVENTION

The present invention relates to the design of improved thrombolytic drugs, which, apart from being capable of plasminogen activation, also exhibit capabilities to inhibit thrombin generation. The presence of these dual properties in the same molecule is potentially of great benefit clinically since this helps to minimize the early re-occlusion problem after thrombolytic therapy. The invention discloses strategically designed chimeric polypeptides, where domains/segments with antithrombin-properties, derived from thrombomodulin, are fused with various thrombolytic proteins such that the resultant fusion/chimeric polypeptides exhibit clot dissolving (thrombolytic) as well as anti-thrombin properties at the same time. These novel fusion constructs have the ability to activate the thrombolytic system in a plasmin and/or thrombin dependent manner (which makes the constructs clot-specific, as fibrin clots are plasmin--as well as thrombin-rich, whereas free plasmin and thrombin are short-lived in the circulation, being rapidly inactivated by Serpins such as alpha-2 antiplasmin, anti-thrombin etc). These constructs also simultaneously inhibit the transiently generated thrombin released during clot lysis, and also initiate the in-built (intrinsic) anticoagulant Protein C pathway during the medication with these agents in the event of thrombotic disorders such as stroke, myocardial infarction, deep vein thrombosis, etc.

Unlike the currently available thrombolytics, the present invention discloses new thrombolytic constructs which are capable of targeting factors Va and VIIIa of the coagulation cascade (besides the capability to activate the plasmin-dependent thrombolytic pathway) and also the intrinsically in-built anticoagulant Protein C pathway; this combinatorial presence of several desirable capabilities in the same drug molecule improves their overall efficacy, such that these can dissolve the pathological blood clots while minimizing one of the most potentially life-threatening, post-thrombolytic events, namely the relapse of the clotting process.

The approach is to design, test, and validate the creation of fusion proteins with both anti-thrombin and thrombolytic properties. The successful "functional" fusion of EGF 4,5,6-into a thrombolytic molecule can potentially target the latter towards thrombin-rich clots due to the former's intrinsic thrombin affinity. At the same time, if the said fusion, apart from retaining the two originally `independent` parent biological activities (i.e. anti-thrombin and plasminogen activator activities), confers a pro-drug nature into the hybrid molecule in that it preferentially gets activated in the vicinity of the clot and not systemically, this would be another very useful and advantageous feature due to its targeted nature of action.

In the present invention, several hybrid protein molecules with a combination of thrombolytic property with thrombin inhibiting as well as protein C activation capability has been successfully functionalized by effective integration in the same molecule/s in order to vastly improve the efficacy of presently available thrombolytic drugs and help prevent the re-thrombosis phenomenon, since the presence of all these properties integrated into the same agent/molecule will impart both real-time (temporal) and spatial (in situ) beneficial action at the occluding fibrin blood clot in the various thrombotic pathological syndromes.

In the present invention, streptokinase, tissue plasminogen a activator and staphylokinase have been fused with EGF 4,5,6, to generate chimeric molecules having both the properties of initiation of plasmin dependent thrombolytic system and thrombin mediated Protein C anticoagulant pathway. Moreover, in some of embodiments of the present invention, the successful integration of thrombolysis, clot specificity, and antithrombin activities--which has not been reported so far is also achieved.

In different fusion constructs, the fusion junctions between the thrombolytic agents and the EGF domains were carefully designed using various preferred amino acid residues in the linkers, and different thrombin and/or plasmin cleavable sites were introduced, which gave different time-dependent plasminogen activation kinetics in vitro due to the proteolytic release of EGF 4,5,6 from the chimeras and consequent activation of the thrombolytic component. The presence of different thrombin cleavable site/s at the junction of thrombolytics and EGF 4,5,6 allows these two to separate from each other at the near-vicinity of thrombin rich clots by locally resident enzymes (thrombin or plasmin); thus after cleavage, each domain performs its function independently. Moreover, in some fusion constructs, transglutaminase-recognizable, cross-linking sequences have been introduced at strategic locations in the chimeric polypeptides so that the activated domains would bind covalently to the remnants of clot, in or around the epithelial tissues (whose damage led to the clot generation in the first place), due to the action of blood transglutminase, and thus continue to give the localized effect in terms of both plasminogen activation and thrombin inhibition long after the initial clot has dissolved. This would clearly lead to a `healing` effect of the drug, an attribute that is unavailable in any thrombolytic protein drug currently being used.

BRIEF DESCRIPTION OF FIGURES

FIG. 1 is a schematic representation of different in-frame gene fusion constructs, where EGF 4,5,6 domains of thrombomodulin were fused with either DNA encoding for Streptokinase, Tissue plasminogen activator or Staphylokinase along with in-frame fused sequences coding for inter-domain linkers including ones with triple-Glycine (GGG), or transglutaminase-recognition signals (TG) to facilitate Coagulation Factor XIII-catalyzed covalent cross-linking of the hybrid protein with other tissues or the fibrin clot, as well as thrombin-cleavable sequence (TCS).

FIG. 1A is a schematic design A represents the DNA sequences encoding for EGF 4,5,6 in-fusion at the N-terminal end of SK (streptokinase).

FIG. 1B is a schematic design B represents the EGF 4,5,6 fusion at the C-terminal end of SK through an appropriate linker containing flexibility promoting residues (e.g., a triple-glycine stretch, GGG).

FIG. 1C is a schematic design C represents the EGF fusion simultaneously at N & C-terminii of SK along with a transglutaminase recognition site/stretch of residues.

FIG. 1D is a schematic design D represents the EGF 4,5,6 domains' fusion at the C-terminal end of SK, wherein 5 amino acids of SK were deleted.

FIG. 1E is a schematic design E represents the simultaneous fusion of EGF 4,5,6 at the N and C-termini of SK, where a thrombin recognition and cleavable sequence (TCS) is present at the junction of EGF and SK.

FIG. 1F is a schematic design F represents the simultaneous fusion of EGF 4,5,6 at N & C-termini of SK, where a thrombin recognition sequence is present at the junction of EGF and SK and a transglutaminase recognition sequence is present at the initial part (N-terminal end) of EGF.

FIG. 1G is a schematic design G represents the fusion of EGF domains at the junction of a and 6 domains of SK.

FIG. 1H is a schematic design H represents the fusion of EGF domains as indicated at the junction of .beta. and .gamma. domains of SK.

FIG. 1I is a schematic design I represents the EGF domains' fusion simultaneously at the N & C-terminii of tPA (tissue plasminogen activator). In all figures and anywhere such terms occur in the specification, "egf" refers to the EGF-like domains of tPA, while "EGF456" refers to the EGF 4,5,6 domains of thrombomodulin.

FIG. 1J is a schematic design J represents the EGF 4,5,6 domains fusion at the C-terminal end of tPA.

FIG. 1K is a schematic design K represents the EGF 4,5,6 domain fusion at the N-terminal end of tPA.

FIG. 1L is a schematic design L represents the EGF 4,5,6 domains' fusion at both N & C-termini of tPA (tissue plasminogen activator), where intrinsic egf of tPA is deleted.

FIG. 1M is a schematic design M represents the EGF 4,5,6 fusion at the N-terminal end of tPA, where intrinsic egf of tPA is deleted.

FIG. 1N is a schematic design N represents the EGF 4,5,6 fusion at the N-terminal end of tPA, where intrinsic egf and kringle 1 of tPA are deleted.

FIG. 1O is a schematic design 0 represents the EGF fusion at the C-terminal end of tPA, where intrinsic egf of tPA is deleted.

FIG. 1P is a schematic design P represents the EGF domain 4,5,6 fusion at the C-terminal end of tPA, where intrinsic egf and kringle 1 of tPA are deleted.

FIG. 1Q is a schematic design Q represents the EGF 4,5,6 domains fusion with tPA, where intrinsic egf of tPA are replaced by EGF 4,5,6 domains.

FIG. 1R is a schematic design R represents the EGF fusion with tPA, where intrinsic egf and kringle 1 of tPA are replaced by EGF 4,5,6 domains.

FIG. 1S is a schematic design S represents the fusion of EGF domains at the C-terminal end of SAK.

FIG. 1T is a schematic design T represents the fusion of EGF domains at the N-terminal end of SAK.

FIG. 2. Is a schematic representation of PCR methods and cloning schemes used in the preparation of different fusion constructs.

FIG. 2A is a schematic design showing the PCR, restriction digestion and cloning strategies used in the construction of N_EGF_SK fusion gene block.

FIG. 2B is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of SK_EGF fusion gene block.

FIG. 2C is a schematic design showing the restriction digestion and cloning strategies used in the making of N_EGF_SK_EGF fusion gene block.

FIG. 2D is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of Inter-domain SK_EGF (EGF 4,5,6 fused between the .alpha. and .beta. domains of SK) fusion gene block.

FIG. 2E is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of interdomain SK_EGF (i.e. EGF 4,5,6 fused between the .beta. and .gamma. domains of SK) fusion gene block.

FIG. 2F is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of tPA gene block.

FIG. 2G is a schematic design showing the restriction digestion and cloning strategies used in the making of N_EGF_tPA and tPA_EGF fusion gene block.

FIG. 2H is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of tPA_EGF fusion gene block, where intrinsic egf and kringle 1 domains of tPA are selectively deleted.

FIG. 2I is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of N_EGF_tPA fusion gene block, where intrinsic egf and kringle 1 domain of tPA is deleted.

FIG. 2J is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of tPA_EGF fusion gene block, where intrinsic egf domain of tPA is replaced with EGF 4, 5, 6 domains.

FIG. 2K is a schematic design showing the PCR, restriction digestion and cloning strategies used in the making of tPA_EGF fusion gene block, where intrinsic egf and kringle 1 domain of tPA is replaced with EGF 4, 5, 6 domains.

FIG. 3 Spectrophotometrically scans of plasminogen activation (Abs 405 nm) showing delayed plasminogen activation by N-terminal fused EGF 4,5,6 and SK constructs and decrease in the lag in presence of trace amounts of plasmin (see `general methods used in examples` for details). Note that native SK does not show any significant lag in plasminogen activation.

FIG. 4. Representation of the increased thrombin clotting time assay by varying amounts (60-180 nm) of different fusion constructs and controls as indicated.

FIG. 5. Protein C activation profiles (see `general methods` for details) in presence of different SK and EGF fusion constructs and suitable controls as indicated.

FIG. 6. Clotting time assay with different tPA fusion constructs (equimolar; 2 nm) and controls as indicated.

FIG. 7. Plasminogen activation in presence and absence of soluble fibrin with various tPA fusion constructs along with control as indicated.

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to the design and preparation of new thrombolytic fusion polypeptides that exhibit distinct functional advantages over the available forms available presently, namely tissue plasminogen activator, SK and SAK or their derivatives/modified forms because the currently available forms only dissolve the fibrin clots through plasminogen activation and cannot prevent post thrombolytic consequences which lead to the early re-occlusion problem during thrombolytic therapy essentially due to thrombin generation.

The present invention discloses methods of making fusion constructs with direct and indirect plasminogen activators fused with the 4th, 5th, and 6.sup.th EGF domains of thrombomodulin which retain the capability not only to activate plasminogen bit also inhibit thrombin directly as well as retain the ability for protein C activation through the anticoagulant pathway mediated by thrombin.

The terms "variant", "homolog", "derivative", "fragment" or "analog" in relation to the amino acid sequence of a protein include any substitution of, variation of, modification of, replacement of, deletion of or addition of one (or more) amino acid from or to the sequence providing the resultant protein or (poly)peptide has activity equivalent to that of the unmodified protein. In particular, the term "homolog" covers homology with respect to structure and/or function. With respect to sequence homology, preferably there is at least 70%, more preferably at least 80%, even more preferably at least 85% homology to the sequence of the unmodified protein. Preferably there is at least 90%, more preferably at least 95%, most preferably at least 98% homology to the sequence of the unmodified protein.

Typically, for the variant, homolog, derivative, fragment or analog of the present invention, the types of amino acid substitutions that could be made should maintain the hydrophobicity/hydrophilicity of the amino acid sequence. Amino acid substitutions may be made, for example from 1, 2 or 3 to 10, 20 or 30 substitutions provided that the modified sequence retains the ability to act in accordance with the present invention. Amino acid substitutions may include the use of non-naturally occurring analogues, for example to increase blood plasma half-life of a therapeutically administered polypeptide.

Conservative substitutions may be made, for example, as shown below. Amino acids in the same line may be substituted for each other:

ALIPHATIC Non-polar G A P I L V

Polar--uncharged C S T M N Q

Polar--charged D E K R AROMATIC H F W Y

As indicated above, proteins of the invention are typically made by recombinant means, for example as described herein, and/or by using synthetic means using techniques well known to the skilled person such as solid phase synthesis.

As used herein a "deletion" is defined as a change in either nucleotide or amino acid sequence in which one or more nucleotides or amino acid residues, respectively, are absent.

As used herein an "insertion" or "addition" is a change in a nucleotide or amino acid sequence, which has resulted in the addition of one or more nucleotides or amino acid residues, respectively, as compared to the naturally occurring protein.

As used herein "substitution" results from the replacement of one or more nucleotides or amino acids by different nucleotides or amino acids, respectively.

As used herein, the terms "4, 5, and 6 epidermal growth factor-like domains" or "EGF 4,5,6" can be any one of the EGF 4, 5, or 6 domains of thrombomodulin, or can refer to all three EGF 4, 5, and 6 domains of thrombomodulin covalently bonded together as a peptide or peptide fragment. Each of the 4, 5, and 6 epidermal growth factor-like domains have homology to one or more domains of the epidermal growth factor (EGF) protein.

The present invention discloses a chimeric protein construct comprising the 4, 5, and 6 epidermal growth factor-like domains (EGF 4,5,6) of thrombomodulin fused to a thrombolytic protein selected from the group consisting of a streptokinase, a tissue plasminogen activator, a staphylokinase, a urokinase, and derivatives and analogs thereof.

In an embodiment of the present inventions is disclosed a chimeric protein construct, where thrombomodulin EGF 4,5,6 domains are fused to said thrombolytic protein, or derivative or analog thereof at the N-terminus, C-terminus, or both N- and C-termini of said thrombolytic protein, or derivative or analog thereof.

The present invention also discloses the design of genetic constructs with minimum essential antithrombotic parts of EGF fused with a thrombolytic protein (SK, tPA or SAK) at the portion encoding the N-terminal end of the thrombolytic protein, wherein translation (in the resultant `chimeric` ORF) begins with the 4.sup.th domain of EGF followed by the portion encoding for thrombolytic polypeptide synthesis. Thus, the mature polypeptide or folded protein contains not only the two different types of proteins but both the functionalities as well. These constructs with the thrombolytic protein are termed as EGF N-terminal fusion constructs.

In another embodiment, we have defined the design principle, and methods of construction, of EGF domains fused at the C-terminal side of the thrombolytic protein, by first fusing of the oligonucleotides blocks encoding the relevant portions (thrombolytic-EGF 4,5,6) such that the translation begins with the thrombolytic protein and terminates at the 6.sup.th domain of EGF, and then expressing the oligonucleotide hybrid block in an expression system, purifying the hybrid and testing it for plasminogen activation as well as thrombin inhibition etc. Here, the translated polypeptide starts with a functionally active thrombolytic protein and has the EGF domains at the C-terminal end, thus also possessing antithrombin and protein C activation capabilities. Designs that lead to the preparation of functional polypeptides have also been disclosed wherein the chimeric polypeptide is inactive initially but attains its plasminogen activation capability upon proteolytic truncation with either plasmin or thrombin.

In another embodiment of the present invention is disclosed a thrombolytic protein comprising a streptokinase with one or more amino acid substitutions, insertions, deletions, or truncations, and wherein the construct possesses plasminogen activation, thrombin inhibition, and anticoagulant protein C pathway activation activity.

Another embodiment contains method of making N & C-terminal fusion constructs, where the thrombolytic protein contains the three EGF domains at the N- and C-termini of thrombolytic protein at the same time. These constructs were designed with the help of expression of oligonucleotide blocks with N-terminal and C-terminal EGF 4,5,6 fusion constructs joined via common restriction site and expression thereof using established methods of gene cloning etc.

In yet another embodiment, the design of intra-protein fusion carrying EGF domains within a thrombolytic such as streptokinase and tissue plasminogen activator, are disclosed.

In another embodiment, the hybrid/fusion construct had tissue plasminogen activator wherein the EGF 4,5,6 domains replaced the kringle 1 domain of tPA. This construct exhibited good plasminogen activity as well as antithrombin properties.

Another embodiment discloses the oxidation resistant forms of EGF domains where the methionine/s of EGF 4,5,6 were replaced with valine, alanine or glutamine amino acid residues in either the N-terminal, C-terminal and N & C-terminal (simultaneous) fusion constructs with thrombolytic (SK, tPA and SAK), described in the foregoing sections, via established methods of site directed mutagenesis.

In yet another embodiment of the invention is disclosed the thrombomodulin EGF 4,5,6 domains which are fused between the alpha and beta or beta and gamma domains of said streptokinase or between the alpha and beta or beta and gamma domains of a streptokinase derivative or analog, wherein the streptokinase derivative or analog comprises one or more mutations, additions, insertions, or truncations, and wherein said construct activates plasminogen, inhibits thrombin, and activates the anticoagulant protein C pathway.

In another embodiment of the present invention is disclosed a construct where the EGF 4,5,6 domains are fused in-frame to streptokinase, or a streptokinase derivative or analog, at one or more positions selected from the streptokinase N-terminus, streptokinase C-terminus, both N- and C-streptokinase termini, or at an inter-domain position of streptokinase.

In yet another embodiment of the present invention is disclosed a chimeric protein construct wherein the streptokinase derivative spans residues 5-383 or 5-414.

In further embodiment of the present invention is disclosed a chimeric protein construct wherein the streptokinase derivative spans residues 16-383.

In yet another embodiment of the present invention is disclosed a chimeric protein construct where the EGF 4,5,6 domains are fused in-frame at one or more positions selected from the streptokinase N-terminus, streptokinase C-terminus, or both N- and C-streptokinase termini, wherein the Met 41 of the EGF 4,5,6 domains is replaced by either valine, alanine, or glutamine; or the C-terminal Met 435 is replaced by valine, alanine, or glutamine; or in the simultaneous N- and C-terminal fusion constructs, Met 41 and Met 435 are independently replaced by either valine, alanine, or glutamine.

In another embodiment of the present invention is disclosed a chimeric protein construct further comprising transglutaminase recognition sequences.

In further embodiment of the present invention is disclosed a chimeric protein construct further comprising one or more thrombin cleavable sequences at the junction of the EGF 4,5,6 domain and the thrombolytic protein, or derivative or analog thereof.

In another embodiment, the hybrid/fusion constructs comprise a thrombin cleavable site at the junction of EGF 4,5,6 and their oxidation resistant forms.

In another embodiment, the hybrid/fusion construct contained EGF 4,5,6 domains are mutated to possess oxidation resistance due to methionine oxidation and consequent loss of activity during their preparation.

In another embodiment of the present invention is disclosed a chimeric protein construct comprising the EGF 4, 5, 6 domain of thrombomodulin fused to a tissue plasminogen activator (tPA) derivative, analog, or fragment at the N-terminus of the tPA derivative, analog, or fragment, at the C-terminus of the tPA derivative, analog, or fragment, at both termini of the tPA derivative, analog, or fragment, or internally within the tPA derivative, analog, or fragment.

In yet another embodiment of the present invention is disclosed a chimeric protein construct wherein the fusion between the EGF 4,5,6 domain and the tPA derivative, analog, or fragment further comprises one or more linker fragments.

In further embodiment of the present invention is disclosed a chimeric protein construct wherein the one or more linker fragments comprise one or more amino acids that promote flexibility of said construct.

In yet another embodiment of the present invention is disclosed a chimeric protein construct wherein the one or more amino acids is chosen from the group consisting of Gly, Asn, Pro, Ser, Gln, Arg and Lys.

In another embodiment of the present invention is disclosed a chimeric protein construct wherein the tPA derivative, analog or fragment comprises one or more mutations, additions, insertions, or truncations, and wherein said tPA derivative, analog or fragment activates plasminogen, inhibits thrombin, and activates anticoagulant protein C.

In yet another embodiment of the present invention is disclosed a chimeric protein construct comprising a fragment of tissue plasminogen activator (tPA), or a truncated or modified form thereof, fused to one or more thrombomodulin EGF 4,5,6 domains, such that the EGF domains of tPA are replaced by the one or more thrombomodulin EGF 4,5,6 domains, and wherein the construct has both antithrombin and plasminogen activation activity.

In further embodiment of the present invention is disclosed a chimeric protein construct comprising a fragment of tissue plasminogen activator (tPA), or a truncated or modified form thereof, fused to one or more thrombomodulin EGF 4,5,6 domains, such that the kringle 1 and EGF domains of tPA are replaced by the one or more thrombomodulin EGF 4,5,6 domains, and wherein the construct has both antithrombin and plasminogen activation activity.

In yet another embodiment of the present invention is disclosed a chimeric protein construct wherein the tPA EGF domains and kringle 1 domain are replaced by one or more thrombomodulin EGF 4,5,6 domains at the N-terminus or C-terminus of the tPA fragment.

In another embodiment of the present invention is disclosed a chimeric protein construct further comprising one or more linker fragments between the tPA fragment or truncated or modified form thereof and the thrombomodulin EGF 4,5,6 domains, the linker fragments comprising amino acid residues that promote flexibility of the construct so that the construct has thrombin inhibition, protein C activation, and plasminogen activation capabilities.

In yet another embodiment of the present invention is disclosed a chimeric protein construct wherein the methionine 41 of the EGF 4,5,6 component is replaced by either alanine, valine or glutamine.

In further embodiment of the present invention is disclosed a chimeric protein construct comprising an EGF 4,5,6 domain of thrombomodulin fused in-frame to the N-terminal or C-terminal end of staphylokinase (SAK).

In yet another embodiment of the present invention is disclosed a chimeric protein construct wherein the methionine 41 of the thrombomodulin EGF 4,5,6 domain is replaced by either alanine, valine or glutamine.

In another embodiment of the present invention is disclosed a chimeric protein construct further comprising thrombin cleavable sequences between the SAK and EGF 4,5,6 domain regions.

In yet another embodiment of the present invention is disclosed a chimeric protein construct further comprising transglutaminase cross-linking sequences.

In another embodiment of the present invention is disclosed a chimeric protein construct wherein said constructs are soluble in aqueous or saline solution.

In this invention, in another embodiment the recombinant chimeric proteins are expressed by plasmids under the control of tightly regulated promoters.

In an embodiment of this invention the various chimeric constructs were expressed through recombinant DNA technology in a suitable hosts such as bacteria, fungi, yeast or animal cells.

In another embodiment of the present invention is disclosed a chimeric protein construct which is secreted into an extracellular medium.

In another embodiment, tissue plasminogen activator and EGF 4,5,6 fusion constructs were expressed in prokaryotic and eukaryotic hosts from which the polypeptides were harvested to obtain the active hybrid constructs in pure form/s.

In another embodiment, various tissue plasminogen activator fusions with EGF constructs were also expressed in eukaryotic systems like animal cell lines, yeast expression system and plant cells where expression cassette was either integrated into host genome or remained in the cytoplasm as an episomal body. The expressed hybrid proteins may be glycosylated or non-glycosylated depending upon the host using for expression.

In another embodiment of the present invention is disclosed a method of treating thrombosis in a mammal, comprising administering to said mammal in need of treatment a therapeutically effective amount of a chimeric protein construct.

In another embodiment of the present invention is disclosed a method of inhibiting thrombin comprising the use of a chimeric protein construct.

In further embodiment of the present invention is disclosed a method of activating protein C comprising the use of a chimeric protein construct.

In yet another embodiment of the present invention is disclosed a method of providing both antithrombin and plasminogen activation comprising the use of a chimeric protein construct.

In another embodiment of the present invention is disclosed a pharmaceutical formulation comprising a pharmaceutically effective amount of a chimeric protein construct.

In another embodiment of the present invention is disclosed a method of thrombolysis in a mammal comprising administering to said mammal in need thereof a therapeutically effective amount of a chimeric protein construct.

In another embodiment, encoding DNA sequences of the hybrid constructs were optimized for the suitable expression host.

In another embodiment, a nucleic acid sequence encoding the chimeric protein construct mentioned above.

In another embodiment, a vector comprising a nucleic acid sequence.

In another embodiment, a host cell comprising a vector.

In another embodiment, a chimeric protein construct is prepared by expression of a nucleic acid sequence encoding said protein in a host cell expression system.

In another embodiment, a method of preparing a chimeric protein construct by expression of a nucleic acid sequence encoding said protein in a host cell expression system.

In another embodiment, the method in which the host cell expression system is a eukaryotic expression system.

In another embodiment, the method in which the host cell expression system is a bacterial expression system.

In another embodiment, the method, in which the bacteria is E. coli.

In another embodiment, the method in which the eukaryotic expression system is an animal cell, or a yeast cell.

In another embodiment, the method in which the yeast is Pischia pastoris.

In another embodiment, the method, wherein the chimeric protein construct is secreted from the host cell into an extracellular medium.

In another embodiment, the purified constructs are useful as therapeutic agents and in pharmaceutical compositions for treatment of mammals having various thrombotic conditions. Mammals may be humans, rodents, or domesticated animals.

In another embodiment, the purified constructs were used as therapeutic agents to alleviate various circulatory disorders with or without additional stabilizing agents and excipients.

According to another embodiment of the invention, the purified constructs are formulated into one or more pharmaceutical compositions. The pharmaceutical compositions with purified constructs, whether one or more, can be formulated in both solid form (i.e. freeze-dried in vials to later be reconstituted in a suitable solution) or also in liquid form.

In one particular embodiment, these compositions with the purified constructs constitute a kit for thrombolytic therapy or treatment which may optionally include other components, such as: containers with solutions for reconstituting the active ingredients, cannulas, drip bags with physiological serum for intravenous application and instructions for use, etc.

The pharmaceutical combinations may be formulated and used either in combination form (i.e. wherein all the active ingredients are combined into one formulation) or in individual form (i.e. wherein the active ingredients are not combined (or not all combined) into one formulation) as tablets, capsules or elixirs for oral administration; suppositories for rectal administration; sterile solutions, suspensions for injectable administration; and the like. The dose and method of administration can be tailored to achieve optimal efficacy but will depend on such factors as patient weight, diet, concurrent medication and other factors which those skilled in the medical arts will recognise.

Generally, with respect to the purified constructs (including uses, methods, pharmaceutical compositions and products) of the present invention, an amount between 0.1 to 1000 mg is administered (as a single dose or on a multi-dose, as-needed basis), dependent upon the potency of the purified construct used.

Preferred embodiments encompass pharmaceutical compositions prepared for storage and subsequent administration which comprise a therapeutically effective amount of the purified constructs or an enriched composition of the purified constructs, as described herein in a pharmaceutically acceptable carrier or diluent. Acceptable carriers or diluents for therapeutic use are well known in the pharmaceutical art, and are described, for example, in Remington's Pharmaceutical Sciences, Mack Publishing Co. (A. R. Gennaro edit. 1985).

Preservatives, stabilisers, dyes and even flavouring agents may be provided in the pharmaceutical composition. For example, sodium benzoate, sorbic acid and esters of p-hydroxybenzoic acid may be added as preservatives. In addition, antioxidants and suspending agents may be used.

In employing the purified constructs or their pharmaceutical compositions or products in a combination therapy in vivo, the compositions/products can be administered to the mammal in a variety of ways, including parenterally (e.g. intravenously, subcutaneously, intramuscularly, colonically, rectally, nasally, buccal, transdermally, vaginally or intraperitoneally), employing a variety of dosage forms.

As will be readily apparent to one skilled in the art, the useful in vivo dosage to be administered and the particular mode of administration will vary depending upon the mammalian species treated, the particular composition employed, and the specific use for which these compositions are employed. The determination of effective dosage levels, that is the dosage levels necessary to achieve the desired result, will be within the ambit of one skilled in the art. Typically, applications of compositions are commenced at lower dosage levels, with dosage level being increased until the desired effect is achieved.

Generally, in carrying out the methods of this invention, the dosage for the purified constructs or pharmaceutical compositions can range broadly depending upon the desired effects and the therapeutic indication. Typically, suitable dosages of the purified constructs will be between about 0.1 and 1000 mg, preferably between about 10 and 500 mg, more preferably between about 10 and 150 mg, most preferably between about 10 and 120 mg. Administration is preferably parenteral, such as intravenous. Administration is also preferably as a single dose or on a multi-dose, as-needed basis. Administration is preferably parenteral, such as intravenous. Administration is also preferably as a single dose or on a multi-dose, as-needed basis.

Injectables can be prepared in conventional forms either as liquid solutions or suspensions, solid forms suitable for solution or suspension in liquid prior to injection, or as emulsions. Suitable excipients are, for example, water/saline, dextrose, mannitol, lactose, lecithin, albumin, sodium glutamate, cysteine hydrochloride or the like. In addition, if desired, the injectable pharmaceutical compositions may contain minor amounts of non-toxic auxiliary substances, such as wetting agents, pH buffering agents, and the like. If desired, absorption enhancing preparations (e.g. liposomes) may be utilised.

For parenteral administration, solutions of a pharmaceutically active agent used in accordance with this invention in either sesame or peanut oil or in aqueous propylene glycol may be employed. The aqueous solutions may be suitably buffered (preferably between pH 4 to pH 9) if necessary and the liquid diluent first rendered isotonic. For example, NIF is used in aqueous solution at a pH of around 7. However, NIF is stable in aqueous solution down to about pH 4. The preferred "partner compound", t-PA (or variants thereof, is generally used in aqueous solution at around pH 5. These aqueous solutions are suitable for intravenous injection purposes. The oily solutions are suitable for intra-articular, intramuscular and subcutaneous injection purposes. The preparation of all these solutions under sterile conditions is readily accomplished by standard pharmaceutical techniques well known to those skilled in the art.

It should be noted that the pharmaceutical compositions and products of the present invention may be lyophilised for storage, prior to reconstitution and thereafter administration using methods well known to those skilled in the art. Whether stored as lyophile(s) or otherwise, the active components of the combinations of the present invention may be mixed together before lyophilisation or after reconstitution (for later co-administration) or stored individually (for later simultaneous, separate or sequential administration).

In one particular embodiment, administration is parenteral, for example by intravenous injection, or administered locally by catheterization for in situ administration in the near vicinity of the clot.

The quantities of purified constructs which may be present in the compositions of the pharmaceutical combination provided by this invention may vary within a broad range, but always in therapeutically effective quantities.

The dosage for each thrombolytic treatment protocol with the compositions of the pharmaceutical combination of this invention will depend on numerous factors, including the patient's age, condition, the severity of the clinical condition to be treated, the route and frequency of administration and of the purified construct which is going to be administered in each case.

In one aspect, this invention relates to a pharmaceutical combination or a kit of the invention, as have already been described, for thrombolytic therapy.

In another additional aspect, the invention also relates to a method of treatment and thrombolytic therapy consisting of administering to the patient a therapeutically effective quantity of one or more purified constructs. In this connection, the compositions according to the present invention are particularly eligible for treating ischemic heart disease and its complications, as well as ischemic cerebral strokes, rheumatoid diseases and other pathologies, in whose pathogenesis there take place an inflammatory reaction, ischemia of tissues, disturbances of hemorheology and vascular microcirculation because of thrombosis.

The present invention discloses fusion constructs of tissue plasminogen activator with EGF 4,5,6 domains of thrombomodulin with a six amino acid containing linker sequence. This linker sequence length and amino acid sequence order can be changed or modulated for further optimizing the functions of both the properties. Initially designed constructs with no linker sequence compared with linker-designed construct showed only a small fraction, roughly 20-25%, of the protein C activity in the different constructs containing optimized linkers.

In another embodiment, invention discloses the making of non natural fusion protein encoding gene blocks and their variants through the standard methods of genetic engineering.

Further, the inter-protein fusion linker sequences preferentially contained 3 or more glycine amino acid residues at the junction sites of the EGF 4,5,6 domains with the plasminogen activator component so as to provide the necessary flexibility to the 4.sup.th domain of EGF which plays key role in Protein C binding and activation. Similarly, linkers were put just after the 6.sup.th domain of EGF when these were fused at the N-terminal region of tPA so that it could facilitate thrombin binding. This was especially so in case where EGF4,5,6 was introduced between the ordered structures/domain of the tissue plasminogen activator. Thus the role of linkers was evident when two partners were fused to obtain preservation of the functionalities of both partner proteins.

The linker sequence was chosen in such a way wherein one positively charged amino acid (Lysine or Arginine) was placed in tandem with a Val residue but before the two or three glycine residues so that it could be cleaved by plasmin in the close vicinity of the clot where the chances of transient thrombin formation is very high during the lysis and both the domains could perform their work independently at the site of injury.

The Linker also contains one proline amino acid which actually helps to change the orientation of EGF 4,5,6 domains so that they can work optimally while binding to thrombin and activation protein C.

In another embodiment, the designed construct linker length can be increased or decreased as well as sequences of amino acids can be altered with natural and non natural amino acids in order to effect the rates of activation.

In another embodiment, thrombin cleavable sequence, transglutaminase recognition sequence and other blood protease susceptible sites can be introduced in the linkers without affecting fibrinolytic and antithrombotic function.

In another embodiment, invention discloses the expression and purification methods of various fusion polypeptides and their better variants.

In another embodiment, invention discloses various non natural polypeptides which show combined properties of thrombolytics and anti thrombin as well as protein C anticoagulant properties.

In another embodiment, oxidation resistant forms of EGF4,5,6 were fused with the functionally improved variants of tissue plasminogen activator which possess mutational variations compared with native tPA (e.g. DNA SEQ ID 20).

In another embodiment, oxidation resistant forms of EGF4,5,6 were fused with a plasmin resistant form of streptokinase.

In another embodiment, oxidation resistant forms of EGF 4,5,6 were fused with the thrombolytic protein where one or more cysteine residues were free.

In another embodiment, expressed fusion polypeptide are used for the treatment of cardiovascular diseases.

In another embodiment, suitable pharmaceutical composition possess expressed fusion polypeptide/s with FDA approved chemical stabilizer like mannitol, human serum albumin (HSA), etc and solubilizing agents.

Expressed fusion construct may formulate for the intravenous administration to human being may contains FDA approved stabilizers.

In another embodiment, EGF 4,5,6 and its variants can be fused with the urokinase type of plasminogen activator.

In another embodiment, different EGF fusion constructs can be made with those proteins which show 75-100% homology with SK, tPA, and SAK and showing 50-100% plasminogen activation potential compared to their native protein/s.

In another embodiment, variants of EGF4,5,6 fused with the SK, tPA and SAK where EGF 4,5.6 variants show 75-100% homology/similarity and 50-100% antithrombin and protein C activity as compare to independently expressed native EGF 4,5,6 domains.

Reagents

Genetic Constructs:

EGF 4,5,6 domain sequences were that of human thrombomodulinc DNA which was commercially custom-synthesized (GeneScript Inc., USA) for optimal expression in the yeast, Pichia pastoris. The synthetic gene segments were ligated in the correct order and cloned in a bacterial plasmid. The fusion constructs between EGF 4,5,6 domains of thrombomodulin, on the one hand, and a thrombolytic eg SAK, SK or tPA (or their derivatives/mutants) was carried out essentially by a combination of (a) custom-gene synthesis using chemical means, and (b) using the well established PCR technology for obtaining selected gene segments using specifically designed primers from the appropriate plasmids (see Methods used in Examples, below), followed by isolating the PCR-generated gene-segment blocks and `fusing` them in-frame using specialized PCR methods such as Overlap Extension PCR etc. Generally, the regular PCR was done with a suitable, high processivity thermostable DNA polymerase (Pfu DNA polymerase from Fermantas Inc., or Stratagene Inc.), or high fidelity pfu turbo (Stratagene Inc.) enzyme. The hybrid DNA constructs were cloned/expressed in the T7 RNA polymerase promoter-based expression vector, pET-23d by transformation into the appropriate Escherichia coli strain--XL-Blue for routine plasmid sub-cloning without concomitant protein expression, and strain BL21 (DE3) strain for protein expression under the T7 RNA Pol promoter--which were procured from Novagen Inc. (Madison, Wis., USA), and also expressed in yeast (Pichia pastoris) under the methanol inducing promoter having in-frame .alpha.-mating factor signal sequence in the vector, pPIC-9K, and GS115 cells were used for expression (Invitrogen Life Technologies, California, USA). The various restriction endonucleases, T4 DNA ligase and other DNA modifying enzymes were acquired from New England Biolabs (Beverly, Mass.). Oligonucleotide primers were supplied by Biobasic, Inc., Canada. Purifications of DNA and extraction of PCR amplified products from agarose gels were performed using kits available from Qiagen GmbH (Germany). Automated DNA sequencing using fluorescent dyes was done on an Applied Biosystems 3130 xl genetic analyzer equipped with a 16-capillary set-up. Glu-plasminogen was either purchased from Roche Diagnostics GmbH (Penzberg, Germany) or purified from human plasma by affinity chromatography (Deutsch and Mertz, 1970). Human protein C, thrombin, hirudin were purchased from Calbiochem., USA, and standard thrombomodulin of rabbit, and recombinant thrombomodulin were both purchased from American Diagnostica Inc., USA. The N-terminal gas-phase amino acid sequencing was done with an Applied Biosystems sequencer, Model 491. Urokinase, EACA, sodium cyanoborohydride, and L-Lysine were purchased from Sigma Chemical Co., St. Louis, USA. Phenyl Agarose 6XL and DEAE Sepharose (Fast-Flow) were procured from GE-Amersham, Uppsala, Sweden, while Ni-NTA beads were from Qiagen. All other reagents were of the highest analytical grade available.

General Methods Used in Examples

1. Recombinant DNA Fusion Methods:

Various methods collectively referred to as Recombinant DNA technology are now well known in the field of molecular biology. Several techniques, standard protocols and their modified forms were have been very well described in several reference books, like Sambrook et al., Molecular Cloning: A laboratory Manual (II.sup.nd edition, Cold Spring Harbor Press, New York, 1989; McPherson, M. J., Quirke, P., and Taylor, G. R., [Ed.] PCR: A practical approach, IRL Press, Oxford, 1991). But several modifications were required in the designing of fusion construct where different publications from the published literature are cited for specific applications. In this invention, where we fused two genes, we took recourse the method known as the Ovelap Extension PCR of Ho et al., (Ho, Hunt et al. 1989), and Mehta and Singh (Mehta and Singh 1999). For small constructs amplification up to 2 Kb, pfu DNA polymerase (Fermentas Inc., USA) were used, and for longer PCR where high fidelity of polymerase action was required for the point mutation construction pfu turbo (Stratagene) was used for the amplification of 6-7 Kb long fragment amplification and site directed mutagenesis (Wang and Malcolm 1999).

2. Restriction Digestion and Ligation:

Restriction digestion and ligation enzymes were obtained from New England Biolabs, USA and `fast digester` restriction enzymes of Fermantas Inc. were used according to the manufacturers' protocols. Mentioned with respect to almost all chimeric fusion construction examples, wherein ligation was carried out between the Xho I (tetra base cutter) and Not I (Hexa base cutter) digested vector and the insert/s, maximized the chances of directional cloning.

3. Electroporation of Ligation Mixtures in E. coli XL 1B Competent Cells and Transformation of Linearized Insert Containing Vector in pPIC-9K:

Ligation mixtures of reaction were electroporated into XL 1B competent cells (Sharma and Schimke 1996). High amount of DNA prepared from the Midi prep kit of Qiagen by following the instruction. In final steps of Midi Preparation DNA was eluted in high salt concentration, here we used 0.3 M sodium acetate of pH 5 at final concentration and 70% ethanol was used for the removal of excess salt (Sambrook et al., 1989), which may interfere in the digestion reactions. By this process we obtained 50-60 .mu.g of DNA which were subjected for the linearization step, with the help of Bgl II enzyme, and after digestion again subjected to the sodium acetate and ethanol precipitation steps, and finally the dried pellet dissolved in 7-8 .mu.l of autoclaved salt free water, where 1-3 .mu.g/.mu.l of DNA was obtained. Here 7-10 .mu.g of DNA was used for the transformation in electrocompetent cells of His-GS 115 cells of Pichia pastoris, finally plated on minimal dextrose where only Hi.sup.s+ transformants were grown on plates. The plasmid pPIC-9k is designed in such a way so that multicopy insertion of desired gene is possible through homologous recombination of with AOX 1 promotor (Ramchuran, Mateus et al., 2005). Multicopy target gene insertion can be monitored through the bacterial kanamycin resistance gene (Tn903) through monitoring the genticin resistant population with increasing antibiotic concentrations. Pichia can tolerate genticin resistance of 0.25 mg/ml as such, but 0.5 mg/ml and 4 mg/ml shows 1-2 copy and 7-12 copy insertion, respectively. Genticin resistance directly correlates with the multiple insertion of desired gene. Due to gene dosage effect it can be deduced that the higher secretion of desired gene products corresponds to a higher insertion number (Norden, Agemark et al. 2011).

4. Expression, Isolation and Refolding of Inclusion Bodies of Fusion Constructs.

Some constructs such as EGF-SAK an SAK-EGF were expressed under pET 23-d where the chimeric proteins accumulated in the form of inclusion bodies in the host E. coli Bl 21-DE 3 cells. Where inclusion bodies were formed maximum amount of over expressed protein was obtained (Misawa and Kumagai 1999; Zhang, Xu et al. 2009). The E. coli BL21 DE3 cell were used for the production of chimeric fusion protein' IBs, where 25 ml of LB (Luria Bertani) from overnight grown BL21 DE3 cell culture, was used as primary inoculum, which were transferred to 500 ml LB (secondary culture) media. Once the OD.sub.600 reached 0.6-0.8 the protein production was induced with the help of 1 mM IPT.sub.G. After induction, cells were kept under shaking conditions for 6 hrs at 40.degree. C. After 6 hr incubation, cells were harvested by centrifugation at 6000 rpm for 10 minutes at 4.degree. C. Finally, harvested cells were washed with 50 mM tris, 100 mM NaCl and 1 mM EDTA solution to remove the media components from cell mass. After washing, cells were suspended in washing solution to a final OD.sub.600 between 35-40; at this dilution cells were subjected for sonication with probe-based sonicator where 30 sec on and off cycles were used for 45 minutes. After completion of lysis cycles, cell pellets were harvested by centrifugation at 12,000 rpm for 15 minutes. Obtained pellets were washed twice with 100 mM NaCl, 50 mM Tris Cl pH 7.4, 1 mM EDTA, 0.1% Triton X-100 and 2M urea-containing solution. Again these IBs were re-suspended in the solution and were harvested by centrifugation it 12000 rpm for 15 minutes. Harvested pellet was washed 2.times. with 100 mM NaCl, 50 mM Tris Cl pH 7.4 and 1 mM EDTA solution so that Triton X-100 was removed. Finally pellet was re-suspended in 8M urea (prepared in 20 mM Tris Cl pH 7.4) and 1 mM DTT for 2 hrs. Most of the dissolved inclusion bodies in this solution were separated from pellet by centrifugation at 12000 rpm for 20 minutes, and the final supernatant contained maximum portion of the chimeric fusion proteins. Now this protein fraction was subjected for refolding where it was diluted up to 0.2 mg/ml and refolded under the following conditions: 2M urea, oxidized and reduced glutathione mole-ratio 1.5:0.5 in 50 mM NaCl, 50 mM Tris-Cl, 2% glycerol at 4.degree. C. for 36 hrs with very gentle stirring. After completion of this refolding step, the mixture was dialyzed against 20 mM Tris Cl pH 7.6, and 50 mM urea for 48 hrs and dialyzed reaction mixture was subjected to purification by tandem chromatographies using hydrophobic and ion exchange chromatography. Disulfide bond formation was monitored by DTNB reaction (Riener, Kada et al. 2002) which is a direct indicator of disulfide bond formation and refolding. Finally, the purified protein was subjected to different activity assays.

5. Casein-Plasminogen Overlay for the Detection of Plasminogen Activation:

In fusion constructs, at the preliminary level, plasminogen activation was screened by this method, where 5% (w/v) skimmed milk is boiled in water containing 15 mM NaCl, and 50 mM Tris along with 1% agarose. After cooling, .about.200-400 .mu.g of plasminogen were added in this mixture, and overlaid onto LB ampicillin containing plates with colonies/clones to be screened (Malke and Ferretti 1984). All the fused recombinant protein with plasminogen activation capability were easily detected by the zone of hydrolysis after incubation for periods varying between 1-2 h and up to 18 h, due to the formation of plasmin which degraded the casein, giving rise to easily visualized zones of clearance against a white background.

6. Screening of Best Produce Clones by Checking Plasminogen Activation Profiles:

After selecting higher copy number containing transformants by the use of genticin resistant marker were subjected for the actual screening of best producer clones. In this method primary culture raised in 2.5 ml of BMGY media (1% yeast extract, 2% peptone, 1.times. glycerol, 1.times. yeast nitrogen base without amino acids and 100 mM of potassium phosphate buffer pH 5.5) at 30.degree. C. for 16-18 hrs. Once the optical density (OD.sub.600) reached up to 3-4 units, we induced the culture by adding 7.5 ml of BMMY media (1% yeast extract, 2% peptone, 1.times. Methanol, 1.times. yeast nitrogen base without amino acids and 100 mM of potassium phosphate buffer, pH 5.5). These cultures are further induced for the production of recombinant production with final 0.5 v/v % methanol for 5 days, such that the recombinant fusion proteins were produced under the influence of the strong methanol induced promoter.

7. Zymography:

Extracellular secreted products and desired band of interest possessing plasminogen activation capability were detected by this method, where 10-12.5% SDS-page gels were run in non reducing sample buffer. After completion, excess of sodium dodecyl sulphate was remove by the washing in 2.5% triton X-100 solution. Then this gel was rinsed by 2-3 times with 50 mMTris, pH 7.4. This washed gel was placed on skimmed milk agarose and plasminogen containing solid surface (agar gel). After incubation for 5-7 hours the development of zones of hydrolysis become visible signifying Plasminogen activating capability in the resolved proteins.

8. Western Blotting Technique:

Detection of desired protein was done with the help of Western blotting. All the fusion constructs that were secreted into extracellular medium from Pichia pastoris cells were separated by the help of centrifugation at 6000 rpm and supernatants were taken for the desired product identification. Supernatant were directly taken as such for the western blotting or concentrated first by the 5 KDa or 10 KDa cut off range concentrators (Amicon) or subjected to the tri-chloro acetic acid precipitation, washed with acetone, and loaded onto 10-12.5% SDS polyacylamide gels. Proteins were transferred on nitrocellulose membrane with the help of Transfer buffer containing 25 mMtris, 175 mM glycine and 20% methanol. Gel blotting on membranes were done at 250 mA for 35 minutes. Blotted membranes were soaked on 10% skimmed milk overnight at 4.degree. or incubated at 37.degree. C. for 2 hours. This blot was further washed with phosphate buffered saline containing 0.1% tween-20 for three time, which removes the excess of skimmed milk. After that blot was submerged in primary antibody or polysera for 1 h at recommended dilution and washed with Tween-20 containing PBS, three times. Further this blot was incubated with the HRP conjugated secondary antibody followed by the PBS washing three times. Finally, blots were developed by the addition of DAB (di-amino benzidine) solution.

9. Lysine-Agarose Chromatography:

Various tissue plasminogen activator fusion construct with EGF 4,5,6 contains kringle domains which known for affinity toward the lysine residues (McCance, Menhart et al. 1994; Ye, Rahman et al. 2001). In this method, supernatant obtained from Pichia pastoris fermentation, having tissue plasminogen activator fusion polypeptide was dialyzed against the phosphate buffer pH 7.5 for 3-4 hrs and loaded on lysine-Sepaharose column pre-equilibrated with phosphate buffer (purchased from Amersham Biosciences, Uppasala, Sweden) with slow flow rate of approx. 0.5 ml/min. After completion of loading, column was again washed with 4-5 bed volumes of phosphate buffer and protein finally eluted in 0.3 M epsilon amino caproic acid and 100 mM NaCl solution (Qiu, Swartz et al. 1998).

10. Thrombin Affinity Chromatography:

Thrombin coupling was done on cyanogen bromide activated bead by previously described procedure (Salem, Maruyama et al. 1984). Here, proteins obtained from different steps of purification were finally subjected to thrombin affinity where columns were equilibrated in 50 mM Tris Cl pH 7.4 and dialyzed against 50 mM Tris Cl, pH 7.4 used for the loading at slow flow rate of approx. 0.5 ml/min; after completion of loading, the columns were washed with the same buffer. Finally protein was eluted by increasing gradient of NaCl (Salem, Maruyama et al. 1984). Different protein fractions were then tested for the protein C activation capability.

11. Hydrophobic Interaction Chromatography:

Purification of different fusion gene constructs of EGF-SK, EGF-tPA and EGF-SAK was done by different methods of chromatography, where hydrophobic and ion exchange chromatography was used for frequent purification of different fusion polypeptides (Goyal, Sahoo et al. 2007). In hydrophobic chromatography, phenyl sepharose (Amersham Biosciences, Uppasala, Sweden) 6% crossed linked beads with average particle size 100-300 .mu.M size diameter were used for the column preparation. Simple XK16/20 column (Amersham Biosciences, Uppasala, Sweden) was packed with the help of peristaltic pump, approximately 25 ml phenyl Sepharose bed was made and equilibrated with 4-5 bed volumes of 0.3 M Na Cl and 50 mM tris, side by side supernatants obtained during the Pichia pastoris fermentation, containing the desired fusion constructs, were maintained in the same buffer strength and salt compositions as the equilibration buffer by dialysis. Equilibrated supernatant was loaded on packed column with 40 ml/hr flow rate, and after completion of supernatant loading, 4-5 bed volume of equilibration buffer was passed for removal of media components and nonspecifically bound impurities and finally desired fusion polypeptides were eluted in water. Eluted proteins were subjected for the second round of purification (see below), and tested for the plasminogen activation, thrombin inhibition and protein C activation assays.

12. DEAE (Diethylaminoethyl) Ion-Exchange Chromatography:

In this chromatographic procedure, DEAE Sepharose.TM. fast flow were packed in XK 16/20 column (Amersham Biosciences, Uppasala, Sweden) and in general the manufacturer's instructions were followed, where mostly, 20 ml swollen matrix was used for the packing. This column was equilibrated with the 20 mM Tris Cl buffer pH 7.4, and supernatants which was obtained from Pichia pastoris, after being extensively dialyzed against the 20 mM Tris Cl buffer pH 7.4, were loaded on equilibrated columns (in separate runs), or after being purified by the hydrophobic interaction chromatography (above), and with its ionic strength maintained same as that of the equilibration buffer, were loaded on the respective columns. After completion of loading, each column was washed with the 4-5 bed volume of equilibration buffer, which helps in the removal of non-specifically or loosely bound impurities and polypeptides. Elution of protein was done by applying increasing gradient of 1M NaCl over 5 bed-volumes of matrix. Protein quantization done with the help of the Bradford method (Bradford 1976) and compared with the standard curve of BSA. Finally purified protein was concentrated by 20 K Da cut-off concentrators (Amicon) and used for various analytical and functional assays.

13. Plasminogen Activation Assays for EFG-Thrombolytic Fusion Constructs:

All chimeric fusion polypeptides constructs contained a thrombolytic component (SK, SAK and tPA), so these constructs' capability to activate the plasminogen was measured by the release of color from chromogenic peptide substrate for plasmin. One-stage assays of streptokinase and all fusion constructs were carried out under conditions where 2 .mu.M Human plasminogen, 50 mM Tris, 0.05% BSA and 5 mM of chromogenic substrate was used, and release of chromogenic substrate is monitored spectrophotometrically as function of time. It followed non linear regression, hence a plot between absorbance and time.sup.2 followed straight line equation. Streptokinase immediately starts conversion of plasminogen into plasmin and shows virtually no delay in activation but in case of some of the fusion constructs, it takes a protracted time to activate the plasminogen into plasmin. This indicated that trace amount of plasmin makes the active complex as the zymogen activation of the plasminogen into plasmin (Pathway I) was not active. This was confirmed, when the progressive addition of trace (nanomolar) amounts of external plasmin progressively reduced the lag time. In case of Plasminogen activation by tissue plasminogen activator, a rapid and simple spectrophotometric method was followed, where simple chromogenic peptide (H-D-Val-Leu-Lys-pNA; S-2251; purchased from Chromogenix Inc.) was used for the detection of plasmin formed by the action of tissue plasminogen activator (Verheijen, Mullaart et al. 1982). This method also was used for validation of enhanced plasminogen activation in presence of fibrin and tissue plasminogen activation (van Zonneveld, Veerman et al. 1986). In this activation assay different purified amount of protein amount in incubated with 2 .mu.M plasminogen, 0.05 M Tris Cl ph 7.2, 100 mM NaCl, 0.05% and 0.5 mM of S-2251 used in presence and absence of soluble fibrin (purchased from American Diagnostics, USA) and without fibrin. Absorbance at 405 monitored up to 2 hr with 1 minute interval time.

14. Clotting Time Experiments with Different Fusion Constructs:

In order to see the effect on thrombin-induced clot formation in presence of different chimeric constructs, a standard curve with different thrombin concentrations was made from which a 20 second clotting time with 6.6 IU of thrombin was obtained. Same amount of thrombin was then incubated with increasing concentrations of constructs to measure the concentrations where clotting time became double compared to the controls (Lougheed, Bowman et al. 1995).

15. Protein C Activation by Different Fusion/Chimeric Constructs:

Different fusion constructs of tissue plasminogen activator, staphylokinase and streptokinase were subjected for the thrombin mediated protein C activation assays in a dose-dependent manner. In this assay different amount of protein (in the nM range) were incubated with 10 nM of thrombin, in presence of 50 mM Tris-Cl, 5 mM CaCl.sub.2, and 0.05% BSA at 37.degree. C. for 20 min. After this time 0.504 of protein C was added into the wells and incubated for 20 minutes at 25.degree. C. After that 0.5 mM hirudin was added to inhibit thrombin and incubation continued for 5 minutes at 25.degree. C. and then chromogenic substrate was added at 0.5 mM final concentration, and the release of colored pNA was monitored at 405 nm with respect to time as detailed earlier (Eisenberg, Miletich et al. 1988; Ewald and Eisenberg 1995; Lougheed, Bowman et al. 1995; Meininger, Hunter et al. 1995; Dahlback and Villoutreix 2005).

EXAMPLES

The following examples are given by way of illustration of the present invention and therefore should not be construed to limit the scope of the present invention.

Example 1

Preparation of Various Fusion Genes Between Streptokinase and EGF 4,5,6 Domains

(i) Hybrid Gene Constructs for Expression of EGF Domains Fused in Frame Upstream to the SK Encoding Open-Reading-Frame (ORF):

A double stranded (ds) DNA block, encoding EGF-SK protein fusion, in which the EGF 4,5,6 encoding sequences were fused in-frame at the N-terminal encoding side of the SK ORF, was constructed using primers N_EGF_SKFp 1 and N_EGF_SK Rp 2 (see table 1 for sequence of primers). The design and construction of a bacterial expression vector pET 23-d_SK has been described by Nihalani et al., 1998. It involved the cloning of the SK gene from Streptococcus equisimilis H46A in pBR 322 (Pratap et al., 1996), followed by sub-cloning into pET-23d, an expression vector containing a highly efficient ribosome binding site from the phage T7 major capsid protein (Studier and Moffatt, 1986), and further modification of the 5' end of the gene to minimize the propensity for formation of secondary structure. Streptokinase expressed from pET-23-d_SK construct is Met-SK. Further details are described in U.S. Pat. No. 7,163,817. This construct was used as a template for amplification of the SK gene (DNA SEQ ID 1, and corresponding protein SEQ ID 112).

A double-stranded polynucleotide block corresponding to EGF 4,5,6 domains (SEQ ID 2, and corresponding protein SEQ ID 111) was selectively amplified using as template a synthetic gene (DNA polynucleotide) corresponding to sequence ID 2 which was prepared by custom DNA synthesis and validated by automated DNA sequencing to sequence ID 2, after cloning in pET 23-d (Novagen) vector. Primer N_EGF_SK Fp1 also contained (see table 1 for detailed description of primers) aXho I restriction site at its 5' end so that the resultant gene block obtained after PCR could be docked into a yeast expression plasmid. Primer N_EGF_SK Rp 2 contained sequence at the 5' end (besides nucleotides hybridizing with the end of the 6.sup.th domain of EGF 4,5,6) and also additional nucleotides which anneal with the 5 side of SK gene ORF. PCR cycle conditions were as follow: Hot start, complete denaturation at 95.degree. C. for 5 minutes; denaturation at 95.degree. C. for 45 seconds, followed by annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute, with a total no. of 28 cycles, and a final extension of 72.degree. C. for 10 minutes for the completion of the amplification of any incomplete PCR products. For the amplification of the SK gene block, the primerN_EGF_SK Fp 3 (upstream) and primer N_EGF_SK_Rp 4 (downstream primer) (see table 1 for detailed description of primers) were used. PCR conditions were as follows: PCR conditions: Hot start, complete denaturation at 95.degree. C. for 5 minutes, denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 3 minute, with a total no of 28 cycles and a final extension of 72.degree. C. for 10 minutes for the complete amplification of any incomplete PCR products. Both PCR products were gel purified from agarose gels by gel extraction purification kit (Qiagen). These two purified PCR products were subjected to Splice Overlap Extension (SOE) PCR (see `General Methods used in Examples` section, above, for details) in order to construct a contiguous EGF 4,5,6-SK hybrid gene construct in which EGF 4,5,6 encoding sequences were fused in-frame with SK gene encoding sequence ending with a terminator codon. This gene block was isolated front agarose gel in purified form and digested with Xho I and Not I restriction enzymes (R.E. enzymes) and ligated into similarly cut pET 23-d plasmid vector (refer to FIG. 1A and FIG. 2 A), which was then transformed into E. coli XL1B (rec A.sup.- and end A.sup.-) cells in which the polypeptide is not expressed although plasmid DNA will be propagated. This plasmid was subjected to Sanger's di-deoxy method of sequencing in order to validate the DNA sequences of the EGF & SK components fused correctly (SEQ ID NO. 4, and corresponding protein SEQ ID 113). In this construct, Xho I and NotI digested cassette was isolated from agarose gel and `docked` into pPIC-9K. In this resultant construct, the upstream EGF 4,5,6 sequences are placed in-frame with the .alpha.-secretory signal sequences as well as the Kex2 processing site, such that the hybrid gene construct, EG-4,5,6-SK is expressed in Pichia pastoris(strain GS115) from the alcohol oxidase promoter located in the vector after its integration into the host genome (Norden, Agemark et al. 2011). The hybrid polypeptide expressed from this expression vector is also efficiently transported across the membrane (see Examples below) and can be isolated there from in pure form.

(ii) Construction of SK-EFG4,5,6 Encoding Gene Construct, where EGF4,5,6 Encoding Domains Were Fused in Frame at the Downstream/C-Terminal Encoding End of SK Encoding Gene:

By using the set of SK_EGF Fp1 (upstream) and SK_EGF Rp2 (downstream) primers (see table 1 for primer sequence), nucleotide sequences corresponding to SK (DNA SEQ ID 1, and corresponding protein SEQ ID 114) were amplified using pET23-d-SK plasmid as template (see `General Methods used in Examples`). Primer SK_EGF Fp1 contains a Xho I restriction site at its 5' end, whereas SK_EGF Rp2, at its 5' end, contains SK sequence up to 1149 bp followed by a triple glycine (Gly-Gly-Gly) encoding segment, as well as a transglutaminase recognition encoding sequence, finally ending with sequence overlapping with the 5' end encoding for the 4.sup.th domain of EGF4,5,6. The resultant gene block contains the same Xho I restriction site at its 5' end, and downstream (3'-end) contains overlapping nucleotide sequence for the 4.sup.th domain. In a second PCR, SK_EGF Fp3 and SK_EGF Rp4 (see table 1 for primer sequence) set of primers were used for the amplification of EGF4,5,6 domains from pET23-d_EGF4,5,6 (containing the Synthetic custom-made gene for EGF4,5,6) as template. Primer SK_EGF_Fp3 contained downstream sequence of SK, up to 1149 bp, followed by a triple glycine codon segment, and transglutaminase recognition site encoding sequence towards its 5' end; the other primer, namely SK_EGF_Rp4 contained partial sequence of the end of the 6.sup.th domain of EGF4,5,6 and a Not I restriction site at its 5' end. After PCR, the resultant gene block 2, obtained by use of this set of primers, contains at its 5' end (upstream 1149.sup.th bp of SK, followed by a triple glycine-encoding and transglutaminase recognition encoding sequences, and on the other hand, at its 3' end it contains a Not I restriction site to facilitate cloning into the pET-23-d vector. PCR conditions were as follows: Complete denaturation at 95.degree. C. for 5 min, then 28 cycles of: 95.degree. C. for 45 seconds, annealing of primers at 45.degree. C. for 45 seconds, and 72.degree. C. for 1 min; finally an extension at 72.degree. for 10 min to complete any partial length PCR products.

Both the PCR blocks (PCR block of SK, and PCR block encoding EGF4,5,6 with partially overlapping sequences) were purified from gel by using QIagen gel extraction kit. These purified PCR products were subjected to splice overlap extension PCR in order to construct contiguous SK_GGG_transglutaminase_EGF4,5,6 hybrid gene construct, and finally amplified with the help of SK_EGF Fp1 and SK_EGF Rp4 (see table 1 for primer sequence) set of `end` primers. Final PCR product was then digested with Xho I and Not I restriction enzymes (refer to FIG. 1B and FIG. 2B). After purification from gel, final digested and purified PCR block was ligated into pET23-d (previously similarly digested with Xho I and Not I, and gel purified). The resultant plasmid was termed pET23-d_SK_GGG_TG_EGF, which was propagated in E. coli XL1B (re-cA.sup.-, end A.sup.-) cells. This plasmid was subjected to Sanger's di-deoxy chain termination method and the complete cloned insert sequence was validated (DNA SEQ ID 6, and corresponding protein SEQ ID 114). From this plasmid construct, by using Xho1 and Not1 enzymes, the hybrid gene construct was isolated and ligated into pPIC-9K where the upstream XhoI site helped the SK-GGG-TG-EG4,5,6 block's in-frame docking into the .alpha.-secretory signal sequence upstream of the hybrid gene in the expression plasmid. This hybrid gene-construct was expressed in Pichiapastoris (GS 115) under the control of the alcohol oxidase promoter, after its integration into the host genome and selection of plasminogen activator-positive clones by functional screening.

(iii) Construction of DNA Hybrid Gene for the in Frame Insertion of the EGF 4,5,6 Domains into the Streptokinase Encoding Gene:

Construction of `inter-domain SK`-EGF constructs in which the sequences for EGF4,5,6 were interspersed within the sequences of SK in a translationally in-frame manner, to give rise to hybrid gene construct/s, were also designed, and then made, with the use of suitable primes (see table no 1 for sequence of primers). The EGF sequence was inserted into the region of the SK gene encoding the inter-domain flexible segments (Wang et al., 1998; Yadav & Sahni, 2009), that is, either between the .alpha. and .beta. domains, on the one hand, or between the .beta. and .gamma. domains, on the other. For this purpose, amplification of the DNA encoding the .alpha.-domain of SK was carried out first, employing the primer set ID.alpha..Fp1 and ID.alpha. Rp 2 (for sequence details, please refer to table 1). Primer ID.alpha..Fp1 contains an Xho I restriction site at its 5' end; on the other hand primer ID.alpha. Rp 2 contains an overlapping sequence for the 4.sup.th domain of EGF at its 5' end. For this reaction, the following PCR conditions were used: Hot start, complete denaturation at 95.degree. C. for 5 minutes, followed by 28 cycles of: denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1.5 minute, and finally an `extension segment` of 72.degree. C. for 10 minutes to allow any incomplete PCR products to be completed. A DNA block encoding EGF 4,5,6 was also amplified separately using the primers set ID EGF Fp3 and IDEGF Rp4 (see table 1 for the sequence of these primers). Using this primer set a DNA block encoding EGF 4,5,6 sequence was obtained in which upstream sequence towards the 5' end partially overlapped with the downstream sequences of .alpha.-domain of SK; likewise the 3' end of this block contained sequence which were overlapping with the upstream sequence of the SK .beta.-domain. A third PCR block encoding both .gamma. and .gamma. domains of SK was obtained by PCR using the primer set ID .beta. Fp5 and ID .gamma. Rp6 (see table 1 for sequence of these primers). For this reaction the following PCR conditions were used: Hot start, complete denaturation at 95.degree. C. for 5 minutes, followed by denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1.5 minute, with a total of 28 cycles, and a final extension of 72.degree. C. for 10 minutes for the complete amplification of any incomplete PCR products. ID .beta. Fp5 primer was designed such that 5' end of this was homologous with downstream sequences of the 6.sup.th domain of EGF, whereas downstream primer ID .gamma.Rp6 contained a terminator codon followed by a NotI restriction site. All three gene-blocks were purified from agarose gels with the help of gel purification kit (Qiagen) and subjected to a one-pot splice overlap extension reaction, in order to obtain a single contiguous gene product in which the order of gene segments was to be as follows: SK.alpha.-EGF 4,5,6-SK.beta.-SK.gamma.. All three segments were added in 1:1:1 molar ratio in a simple PCR reaction where initial 10 cycles were done without the primers and next 18 cycles were done by adding 0.6 .mu.M final concentration each of ID.alpha.Fp1 and ID.gamma.Rp6, in order to further amplify the three-fragment SOE intermediate. For this reaction, the following PCR conditions were used: Hot start, complete denaturation at 95.degree. C. for 5 minutes, followed by (in each cycle) denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 3 minutes, and a final extension of 72.degree. C. for 10 minutes for the completion of any incomplete PCR products. Final PCR product was gel purified and digested with Xho I and Not I restriction enzymes (refer to FIG. 1G and FIG. 2D). This hybrid gene construct was then ligated into pET 23-d vector and transformed into E. coli XL1B (rec A.sup.- and end A.sup.-) competent cells, wherein the DNA could propagate without protein expression (since the host did not provide the required the phage-encoded RNA polymerase), which was subjected to Sanger's automated sequencing with the so-called di-deoxy chain termination method (DNA SEQ ID 3, and corresponding protein SEQ ID 116). The results completely validated the hybrid gene construct. After this, the hybrid gene cassette was isolated from the pET-23-d inter-domain SK_EGF plasmid by digesting it with Xho I and Not I enzymes. This cassette was then ligated into pPIC-9K upstream of, and in-frame with, the .alpha.-secretory signal sequence, and transformed into Pichia pastoris (GS115), cloned and selected as before by functional screening for plasminogen activation, the expression being under the influence of the alcohol oxidase promoter of the vector after integration in host genome after methanol induction as detailed in the Methods section.

(iv) Construction of Hybrid SK-EGF Gene in which the SK Component is Flanked on Both Sides by the EGF 4,5,6 Encoding Domains:

Another construct in which the SK encoding sequences were flanked on both sides by in-frame fused EGF 4,5,6 domains, was also constructed by taking pET23-d N_EGF_SK plasmid construct (see above, sub-sections i and ii), and subjecting it to Xho I and AflII (unique sites in the pET23-d N_EGF_SK construct) digestion, the same treatment also being given to pET-23-d-SK_EGF construct, and both digestion products resolved on agarose gels. The Xho I and Afl-II segment obtained from N_EGF_SK construct was ligated with the larger fragment of SK_EGF digestion, and the result of this gave the N_EGF_SK_EGF (DNA SEQ ID 7, and corresponding protein SEQ ID 115) in the pET23-d vector (refer to FIG. 1.C and FIG. 2.C). The expression cassette from this plasmid was isolated by Xho I and Not I digestions (this construct being first validated by DNA sequencing, as before) and ligated into pPIC-9K in-frame of the .alpha.-secretory signal sequence upstream of the EGF-SK-EGF hybrid cassette and expressed in pichia pastoris under the control of the alcohol oxidase promoter after integration in host genome, as before, after functional screening (see below).

(v) Construction of N_EGF_SK, SK_EGF and N_EGF_SK_EGF Encoding Gene Segments Containing Sequences Encoding Oxidation Resistant Polypeptide Segments Corresponding to EGF 4,5,6:

In N_EGF_SK, SK_EGF and N_EGF_SK_EGF polypeptides, the methionine residue present at the 41.sup.st amino acid residue of EGF 4,5,6 domains, or the 434.sup.th amino acid residue of SK_EGF, and 41.sup.st and 434.sup.th amino acid position N_EGF_SK_EGF, respectively, as part of the EGF4,5,6 domains are known for their oxidation proneness, which hampers the antithrombin activity especially the protein C activation function of these domains. Hence, keeping this in mind, in our design of the various SK-EGF fusion/gene fusion segments, we replaced this methionine with valine/alanine/glutamine amino acid residues at the gene level. This goal was achieved by the use of high fidelity enzyme pfu turbo DNA polymerase (Stratagene), as before, and introduction of site specific mutations in different templates using appropriate primers (Wang and Malcolm 1999). In order to make these constructs, three sets of primers were designed which allow the incorporation of either valine, alanine, or glutamine separately in different constructs at the position of the original Met residue in the EGF 4,5,6 domain/segment of the gene construct. The primers sets were named as follows:

i. M rep V Fp, and M rep V Rp (refer: table 1 for sequence of primer)

ii. M rep A Fp, and M rep A Rp (refer: table 1 for sequence of primer)

iii. M rep Q Fp, and M rep Q Rp (refer: table 1 for sequence of primer)

In the next step, pET 23-d_N_EGF_SK and pET 23-d_SK_EGF plasmids were used as template with above mentioned sets of primers. For each set of primers PCR cycle schemes were as follows: complete denaturation at 95.degree. C., followed by denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 second, extension at 68.degree. C. for 7 minutes for 28 cycles and extension for a further 10 min at 72.degree. C. Final PCR blocks obtained by this reaction were digested with Dpn I restriction enzyme which cleaves methylated DNA and enhances the probability of getting positive clones after the transformation. This PCR product was transformed in to E. coli XL1Blue cells and plated on ampicillin containing LB agar plates and incubated at 37.degree. C. for 16-18 h. A few clones were randomly picked and raised into 7-10 ml cultures in amipicillin-containing LB media. Plasmids were isolated and sequenced, to validate the presence of the desired mutation/s. By adopting this procedure, methionine was replaced with valine, alanine or glutamine amino acids at the gene level in both the constructs. These constructs were used to make valine, alanine and glutamine mutations in N_EGF_SK_EGF gene by standard sub-cloning procedures. Finally, these mutants were transferred to pPIC-9K and their expression was checked in GS115 strain of Pichia pastoris (see `general methods used in examples`).

(vi) Construction of .DELTA.SK_EGF Construct with N-Terminal of SK with Five Amino Acid Deletion:

In this construct, the final objective involved was the removal of five amino acid at the N-terminal region of SK. These 5 amino acids-encoding nucleotides were removed with the help of PCR primers .DELTA.SK_EGF Fp 1 and .DELTA.SK_EGF Rp 2 (refer to table 1 for sequence of these primers) using pET 23-d_SK_GGG_TG_EGF (oxidation resistant, where met 41.sup.st in EGF 4,5,6 segment was replaced by valine; see above) as a template. The primer .DELTA. SK_EGF Fp1 contains a Xho I restriction site and overlapping sequence of SK started from 16.sup.th base pair at its 5' end. .DELTA.SK_EGF Rp 2 contains sequence of 6.sup.th domain of EGF 4,5,6 and Not I site at its 5' end. PCR cycles were used for this reaction as follows: complete denaturation at 95.degree. C. for 5 minutes, next 28 cycles: denaturation 95.degree. C. for 45 seconds, annealing at 55.degree. C. for 45 seconds, extension at 72.degree. C. for 3 minutes and final extension done at 72.degree. C. for 10 minutes for complete amplification of incomplete PCR products. Final PCR product was gel eluted and digested with the Xho I and Not I enzymes and ligated into pET 23-d vector, and sequenced for validation of complete and correct open reading frame. Finally .DELTA.SK_EGF (refer to FIG. 1D) cassette was ligated in pPIC-9K and checked for its expression by standardized procedures as described earlier.

(vii) In-Frame Introduction of DNA Sequences Encoding for a Thrombin Cleavable Site at the Junction of Oxidation Resistant N_EGF_SK and N_EGF_SK_EGF Encoding Gene Blocks:

From the expression of N_EGF_SK, purification and kinetic analysis of plasminogen activation, which established a delayed nature of plasminogen activation, it was apparent that unlike native/unmodified SK, this construct could not activate human plasminogen directly, but required the presence of pre-formed plasmin. This automatically confers an advantage of clot-specific activation in such a construct since the clot in vivo is plasmin rich whereas the plasmin is rapidly inactivated in the general circulation. Similarly, fibrin clots are also thrombin-rich; hence, we mutated suitable sites in the construct to make it thrombin activatable as well. In order to do this, we mutated the inter-domain joining region of EGF and SK by a thrombin cleavable site, the result of which should give a thrombin cleavable activation switch in plasminogen activation. This can be monitored in one-stage assay by adding incrementally small amounts of thrombin and observing (as in the case of a similar plasmin-enrichment experiment described before) a progressive decrease of lag in plasminogen activation in N-terminal EGF4,5,6 fused SK construct. Thrombin cleavable sequence of factor XI was introduced at the junction of EGF and SK gene construct. This was achieved by the overlap extension PCR, where junction primers containing overlapping sequence and thrombin cleavable amino acid encoding nucleotides were used. In first PCR reaction, primers N_EGF_TCS Fp 1 and N_EGF_TCS Rp 2 (refer table 1 for the sequence of these primers) were used for the amplification of EGF 4,5,6 domains. The primer N_EGF_TCS Fp 1 contains a Xho I restriction site and sequence of 4.sup.th domain of EGF at its 5' end; on the other hand N_EGF_TCS Rp2 contains 6.sup.th domain sequence of EGF followed by thrombin cleavable site encoding sequence followed by upstream part of SK. PCR conditions were as follows: denaturation at 95.degree. C. for 5 minutes, in next 28 cycles, denaturation at 95.degree. C. for 45 seconds, annealing at 50.degree. C. for 45 seconds, extension 72.degree. C. for 1 minute and final extension done at 72.degree. C. for 10 minutes in order to complete the incomplete PCR fragment. PCR block obtained by this reaction contains a Xho I restriction site at its 5' end and thrombin cleavable encoding nucleotide sequence and overlapping part of SK at 3' end. In next PCR reaction TCS_SK Fp 3 and SK Rp 4 (refer table 1 for the sequence of these primers) were used, where upstream primer (TCS_SK Fp 3) contains sequence of 6.sup.th domain, overlapping part of EGF4,5,6, thrombin cleavable encoding nucleotide sequence, and SK encoding nucleotide sequence in 5' to 3' order; on the other side, SK Rp 4 contains a Not I cleavable site at its 5' end. PCR conditions were as follows: denaturation at 95.degree. C. for 5 minutes, in next 28 cycles, denaturation at 95.degree. C. for 45 seconds, annealing at 50.degree. C. for 45 seconds, extension 72.degree. C. for 1 minute and final extension at 72.degree. C. for 10 minutes in order to complete the synthesis of any partial-length daughter fragments. The obtained PCR block should contain overlap sequence of 6.sup.th domain and thrombin cleavable encoding nucleotides upstream, whereas downstream it should contain a Not I restriction site. Both PCR blocks were gel purified and mixed in 1:1 molar ratio in a single pot reaction, and amplified by the end-primers TCS Fp1 and SK Rp6, which gave the required N_EGF_TCS_SK PCR block (refer to FIG. 1.E) (TCS: thrombin cleavable sequence), which was gel purified and digested with Xho I and Not I enzymes, and finally ligated into similarly digested pET23-d by standard procedures. This construct sequence, after sub-cloning in E. coli XL Blue, was validated with respect to it open reading frame. This established that a Factor XI thrombin cleavable site with the following amino acid sequence at the junction of EGF4,5,6 and SK was created in the gene: Ile-Lys-Pro-Arg-Ile-Val-Gly. In this sequence, the thrombin specificity results in cleavage at the junction of Arginine and Isoleucine such that after thrombin's action, one amino acid was removed from the N-terminal end of SK and also, the second amino acid would be changed to valine (in native SK, the N-terminal residues are Ile-Ala-Gly-). After this, the N_EGF_TCS_SK cassette was ligated into pPIC-9K and its expression was carried out in Pichia pastoris. The thrombin cleavage was indeed found to be true in case of the purified construct, after treatment with thrombin, and confirmed by N-terminal protein sequencing.

(viii) EGF4,5,6 Domains Fused Translationally in Frame at the Junction of the .beta. and .gamma. Domain of SK:

For this purpose, amplification of a .beta.-domain was carried out employing primer ID .alpha..beta. Fp1 & ID .alpha..beta. Rp2 (refer table 1 for the sequence of these primers) by using pET23-d_SK as template. Primer ID .alpha..beta. Fp1 contains Xho I restriction site at its 5' end, on the other hand ID .alpha..beta. Rp2 contains downstream sequence of .beta. domain of SK as well as partly overlapping sequence of 4.sup.th domain of EGF4,5,6. PCR block obtained by these set of primer contain Xho I restriction site at upstream sequences, and downstream contain terminal sequences of .beta.-domain and overlapping sequence of 4.sup.th domain of EGF. In next step per block 2, which encodes for EGF4,5,6, were isolated by using IDE4Fp3 and IDE6Rp4 (refer table 1 for the sequence of these primers) set of primers. Primer IDE4Fp3 contains downstream sequence of .beta.-domain of SK at its 5' end and IDE6Rp4 contains .gamma. domain upstream overlapping sequence at its 5' end. PCR block 2 obtained by these set of primer contains overlapping sequence of downstream .beta.-domain at 5' end and other end contains upstream sequence of .gamma. domain. PCR conditions for this amplification as follows. Complete denaturation at 95.degree. C. for 5 min. next 27 cycles 95.degree. C.-45 second, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute and final extension done 72.degree. C.-10 minutes. In next step .gamma. domain of SK was isolated by using ID.gamma.Fp5 & ID .gamma. Rp6 (refer table 1 for the sequence of these primers) set of primer. Primer ID .gamma. Fp5 designed in such a way, where 5' end of ID.gamma.Fp5' contains homologous downstream sequence of 6.sup.th domain of EGF4,5,6, where as ID.gamma.Rp6 contains termination codon followed by Not I restriction site. The following per scheme used for the amplification of block 3; Hot start for 5 minutes at 95.degree. C., denaturation at 95.degree. C. for 45 seconds, annealing at 47.degree. C. for 45 seconds and extension done at 72.degree. for 1.5 minutes. A total no of 28 cycles carried out, and a final extension of 10 minutes at 72.degree. C. for completion of any incomplete amplified products. All the obtained PCR were gel purified by gel extraction kit (Qiagen) and quantitated by A.sub.260 spectrophotometrically. In final pct reaction, all the three gene blocks subjected in a single pot for splice overlap extension reaction, in order to get single contiguous gene block in which order of resultant construct as follow: SK.alpha.-SK.beta.-EGF4,5,6-SK.gamma., all the three per mixed in 1:1:1 molar ratio in a polymerase chain reaction, where initial 10 cycles carried out without any primers and next 18 cycles done by adding 0.6 .mu.M final concentration of ID.alpha..beta.Fp1 & ID.gamma.Rp6 primers, in order to amplify the three fragment intermediate complete gene block. PCR conditions were as follows: Hot start at 95.degree. C. for 5 minutes, denaturation at 95.degree. C. for 45 second, annealing at 45.degree. C. for 45 seconds, and extension at 72.degree. C. for 3 minutes, a total no. of 28 cycles were carried out where initial 10 cycle without primers and final amplification done at 72.degree. for 10 minutes. Finally obtained gene block contains Xho I site at its 5' end and Not I site at it 3' end. This gene block digested with Xho I and Not I enzymes and clone to pET 23-d and pPIC 9K. Its expression, purification and characterization checked in pichia pastoris This gene block contain EGF 4,5,6 domains between the .beta. and .gamma. domain of SK (DNA SEQ ID 5, and corresponding protein SEQ ID 129; see FIG. 1H, and FIG. 2E).

(ix) Incorporation of a Transglutaminase Recognition Sequence at the N-Terminal Encoding End of N_EGF_TCS_SK Hybrid-Gene Block (Containing Methionine Oxidation Resistant Mutations):

For incorporation of a transglutaminase recognition sequence at the beginning or before the 4.sup.th domain of EGF 4,5,6 domains in the EGF-SK constructs, primers TG_N_EGF_Fp 1 and Afl II Rp 2 (refer table 1 for detailed sequence of primer) were designed where TG Fp1 contains a Xho I restriction site, and nucleotide sequence encoding for the blood factor XIII transglutaminase recognition amino acid sequence at its upstream region, while primer Afl II Rp 2 contains nucleotide sequence of that region which contains Afl II restriction digestion site (165-170.sup.th nucleotide of SK contains Afl II restriction site which is situated at the centre of this primer). From these primers, we obtained by PCR a gene block that contains a Xho I restriction site, transglutaminase recognition encoding nucleotides, and sequence of 4.sup.th domain of EGF4,5,6 with the downstream part of the block containing an Afl II restriction site. This gene block (oxidation resistant and thrombin cleavable sequence containing) was extracted from gel. Plasmids pET 23-d N_EGF_TCS_SK and pET 23-d N_EGF_TCS_SK_EGF were digested with Xho I and Afl II. Result of this gave the Xho I and Afl II gene block and larger and smaller parts from both the plasmid constructs. The digested gene block was ligated with the larger part of the constructs, and transformed into E. coli XL Blue to obtain the TG_N_EGF_TCS_SK and TG_N_EGF_TCS_SK_EGF (refer to FIG. 1F) containing plasmids. These were sequenced and validated for the correct open reading frames i.e. presence of transglutaminase encoding sequence in the context of the EGF-SK constructs described earlier. Both cassette were then ligated in Pichia pastoris and checked for their expression of these constructs (please refer to `methods used in examples`).

TABLE-US-00001 TABLE 1 Primers used for the various EGF 4, 5, 6 and streptokinase gene fusion constructs preparations. S. Name of No. SEQ ID Nos. primer Primers Sequence 1 SEQ ID 21 N_EGF_SK 5' GAATATCTCGAGAAAAGAGTGGACCCGTGCTTCA- Fp 1 GAGCCA 3' 2 SEQ ID 22 N_EGF_SK 5' GTCTAGCAGCCACTCAGGTCCAGCAATGCCGGAGTCA Rp 2 CAGTCGGTGCC 3' 3 SEQ ID 23 N_EGF_SK 5' GGCACCGACTGTGACTCCGGCATTGCTGGACCTG Fp3 AGTGGCTGCTAGAC 3' 4 SEQ ID 24 N_EGF_SK 5' CCTATACGCGGCCGCTTATTTGTCGTTAGGGTTAT- Rp 4 CAGGTAT 3' 5 SEQ ID 25 SK_EGF Fp 1 5' GCATATCTCGAGAAAA- GAATTGCTGGACCTGAGTGGCTGCTA 3' 6 SEQ ID 26 SK_EGF Rp 2 5' GAAGCACGGGTCCACCACAATTTGTTGAGCTTGTCCG CCACCGGCTAAATGATAGCTAGC 3' 7 SEQ ID 27 SK_EGF Fp 3 5' GCTAGCTATCATTTAGCCGGTGGCGGACAAGCTCAAC AAATTGTGGTGGACCCGTGCTTC 3' 8 SEQ ID 28 SK_EGF Rp 4 5' CCATATCGCGGCCGCGCCGGAGTCA- CAGTCGGTGCCAAT 3' 9 SEQ ID 29 ID .alpha. Fp 1 5' GGATATCTCGAGAAAA- GAATTGCTGGACCTGAGTGGCTGCTA '3 10 SEQ ID 30 ID .alpha. Rp 2 5' AAGCACGGGTCCACGGGCTCA- GATTTCGCTTGGTTTTGTATT 3' 11 SEQ ID 31 ID EGF Fp 3 5' AATACAAAACCAAGCGAAATCTGAGCCCGTGGACCCG TGCTT 3' 12 SEQ ID 32 ID EGF Rp 4 5' TACAGTATATTCCACATCAACGCCGGAGTCACAGTCA GTGCCAA 3' 13 SEQ ID 33 ID .beta. Fp 5 5' ATTGGCACTGACTGTGACTCCGGCGTTGATGTGGAAT ATACTGT 3' 14 SEQ ID 34 ID .gamma. Rp 6 5' AAATATCGCGGCCGCTTTGTCGTTAGGGTTATCAGG- TATA 3' 15 SEQ ID 35 M repV Fp 5' CACAGGTGTCAGGTGTTTTGCAATCAGACTG 3' 16 SEQ ID 36 M rep V Rp 5' CAGTCTGATTGCAAAACACCTGACACCTGTG 3' 17 SEQ ID 37 M rep A Fp 5' CCGCACAGGTGCCAGGCTTTTTGCAACCAGACTG CTTGTCCA 3' 18 SEQ ID 38 M rep A Rp 5' TGGACAAG- CAGTCTGGTTGCAAAAAGCCTGGCACCTGTGCGG 3' 19 SEQ ID 39 M rep Q Fp 5' CACAGGTGTCAGCAATTTTGCAACCAGA- CAGCCTGT 3' 20 SEQ ID 40 M rep Q Rp 5' ACAGGCTGTCTGGTTGCAAAATTGCTGA- CACCTGTG 3' 21 SEQ ID 41 .DELTA.SK_EGF 5' GCATAACTCGAGAAAAGAGAGGCTTGGCTGCTA- Fp 1 GACCGTCCA 3' 22 SEQ ID 42 .DELTA.SK_EGF 5' CCATATCGCGGCCGCGCCGGAGTCA- Rp 2 CAGTCGGTGCCAAT 3' 23 SEQ ID 43 N_EGF_TCS 5' GCCTAACTCGAGAAAAGA- Fp 1 GAGCCCGTGGACCCGTGCTTCAGA 3' 24 SEQ ID 44 N_EGF_TCS_Rp2 5' GACAATTCTAGGTTTAATGCCAGAGTCA- CAGTCGGTGCCAAT 3' 25 SEQ ID 45 TCS_SK Fp 3 5' GGCATTAAACCTA- GAATTGTCGGACCTGAGTGGCTGCTAGA 3' 26 SEQ ID 46 SK Rp 4 5' CCTATACGCGGCCGCTTATTTGTCGTTAGGGTTAT- CAGGTAT 3' 27 SEQ ID 47 ID .alpha..beta. Fp1 5' GGATATCTCGAGAAAA- GAATTGCTGGACCTGAGTGGCTGCTA '3 28 SEQ ID 48 ID .alpha..beta. Rp2 5' CTCTGAAGCACGGGTCCACGGGCTCCAAGTGACTGCG ATCAAA 3' 29 SEQ ID 49 IDE4Fp3 5' TTTGATCGCAGTCACTTGGAGCCCGTGGACCCGTGCTT CAGAG 3' 30 SEQ ID 50 IDE6Rp4 5' AACGTATTTGATGGTGAACAGTTTGCCGGAGTCA CAGTCG 3' 31 SEQ ID 51 ID.gamma.Fp5 5' CGACTGTGACTCCGGCAAACTGTTCACCATCAAATAC GTT 3' 32 SEQ ID 52 ID .gamma. Rp6 5' AAATATCGCGGCCGCTTTGTCGTTAGGGTTATCAGG- TATA 3' 33 SEQ ID 53 TG_N_EGF_Fp 1 5' GGTATCCTCGAGAAAAGAGTTCAAGCGCAACAGA TCGTGGAACCCGTGGACCCGTGCTTCAGA 3' 34 SEQ ID 54 Afl-II Rp2 5' GGTTTTGATTTTGGACTTAAGCCTTGCTCTGTCT 3'

Example 2

Expression and Functional Characterization of Various EGF-SK Hybrid Polypeptides

The different gene blocks described in Example 1, e.g. N_EGF-SK, SK-EGF and N_EGF_SK_EGF, and another class of inter-domain fusion constructs, like interdomain EGF_.alpha. .beta. SK, interdomain EGF_.beta. .gamma.SK, truncated .DELTA.SK_EGF, and oxidation resistant forms of N_EGF_SK, SK_EGF and N_EGF_SK_EGF, with transglutaminase and thrombin cleavage sites etc incorporated, and all cloned in the expression vector pPIC-9K, and also validated with respect to express functionally active hybrid gene products expected from the sequence of the respective gene-fusions, were then isolated from relatively larger-volume cultures prior to their further characterization. As described in Example 1, Pichia clones were routinely tested initially by the casein overlay method for plasminogen activation capability, and several (10-20 each) positives were then grown on BMGY and BMMY media (BMGY=1% yeast extract, 2% peptone, 1.times. glycerol, 1.times. yeast nitrogen base without amino acids and 100 mM of potassium phosphate buffer pH 5.5, and BMMY=1% yeast extract, 2% peptone, 1.times. Methanol, 1.times. yeast nitrogen base without amino acids and 100 mM of potassium phosphate buffer, pH 5.5) and then inducing with methanol as described earlier under `Methods`, and the cell-free supernatants were used for casein overlay assays (for re-confirmation) as well as plasminogen activation (spectrophotometric) assays in presence of peptide chromogenic substrate. Those found to be relatively high producers were then grown on one-liter level and proteins purified by hydrophobic interaction (e.g. phenyl-agarose) and ion-exchange (DEAE-agarose) chromatographies in tandem (details are described under the section `general methods used in examples`). The hybrid SK-EGF polypeptides obtained by these two methods of purification were generally 90-95% pure by SDS-PAGE. All the purified constructs were tested for plasminogen activation capability (single-stage assays using human plasminogen) as well as thrombin inhibition assays for measuring clotting time, as well as chromogenic assays for Protein C activation (see `methods used in examples`). While SK_EGF and oxidation resistant SK_EGF showed kinetics of PG activation closely similar to SK but with a 2-3 minute additional lag in activation kinetics, in case of N_EGF_SK, and oxidation resistant N_EGF_SK, N_EGF_TCS_SK and TG_N_EGF_SK the lag in the activation was highly pronounced (20-25 minutes) after which the plasminogen activation kinetics was native-SK like. This suggested that the initial activation of the PG by the constructs was delayed whereas in the case of unmodified SK, it is virtually instantaneous. However, once the SK construct was activated, albeit after the lag, it exhibited full plasminogen activating characteristics. A slightly greater lag (30-35 minutes) found in the bi-polar EGF fusion protein, namely N_EGF_SK_EGF, oxidation resistant N_EGF_SK_EGF, N_EGF_TCS_SK_EGF and its variant TG_N_EGF_TCS_SK_EGF. However as stated before, after abolishment of lag, the rate of plasminogen activation per milligram of protein (specific activity) was similar to that of unmodified SK. The reason for the lag in N_EGF_SK, N_EGF_SK_EGF and similar kind of construct was found to be the abolishment of the self activation mechanism of the zymogen (Bajaj and Castellino 1977; Boxrud, Verhamme et al. 2004; Aneja, Datt et al. 2009). This was established by the observation that there was a progressive loss of lag by slight addition of small quantities (in nanomolar amounts) of Plasmin into the reaction assays. In addition, there was no lag when the pre-formed plasmin complexes of these constructs were used in assays clearly suggesting that instead of an instantaneous plasminogen activation mechanism observed with SK, the fusion constructs with the lag were now capable of plasminogen activation only once they were complexed with plasmin. A similar plasmin dependent activation was also found in the inter-domain .alpha. .beta. EGF_SK construct; however, after activation its overall specific activity was found to be only 40-50% that of unmodified streptokinase. Remarkably, in case of the other inter-domain construct, where the EGF 4,5,6 segments were placed at the junction of the .beta. and .gamma. domain of SK, the purified protein showed less than 5% plasminogen activity compared to unmodified SK. This clearly shows that any fusion of EGF with SK is not automatically functional, but only the correctly designed ones are so. These can be selected out by screening (when the designing has been done either empirically or by virtue of structural assumptions) using the plate/spectrophotometric assays for plasminogen activation, thrombin inhibition etc which can be easily adapted for a high-throughput screening system. Thus, any designed site-specific substitution, deletion or domain-additive mutants of SK, or naturally occurring variants of streptokinase, can be used to get similar SK-EGF proteins by the approach adopted here.

The purified constructs were also tested for the measurement of inhibition of thrombin by the clotting time assay using human blood factors (see Methods used in Examples, previously described). Remarkably all of the constructs showed significant increase in clotting time in these assays (approximately 2.5-3 fold) over that of control assays which did not have any construct, or had native SK, as another control. Moreover, the increase in clotting time was found to follow a linear dose-dependent behavior over the low nano-molar range of concentration, which was closely similar to that observed with EGF4,5,6 domains obtained by expression in Pichia, used as a positive control. These results established that the EGF fusion constructs which had plasminogen activation capability (as also the one which had very low activity) also exhibited strong thrombin inhibiting capabilities as well.

Example 3

Construction of DNAs Encoding Various EGF 4,5,6 and tPA Hybrid Genes

A DNA segment encoding EGF4,5,6 sequence (SEQ ID 2, and corresponding protein SEQ ID 111) fused in frame with encoding tpA (SEQ ID 9, and corresponding protein SEQ ID 120) and another segment of DNA fused in frame encoding EGF4,5,6 (SEQ ID 8, and corresponding protein SEQ ID 111) was chemically synthesized purify and cloned in pUC19. It was sequenced to establish its validity (SEQ ID 8, and corresponding protein SEQ ID 111). This construct refer to as EGF-tpA-EGF (SEQ ID 10, and corresponding protein SEQ ID 121). In addition to this gene construct wherein EGF4,5,6 domains gene encoding segments were fused either at the N-terminal site of tPA (SEQ ID 11, and corresponding protein SEQ ID122) or fused at the C-terminal of tpA (SEQ ID 12, and corresponding protein SEQ ID 123). The tPA encoding sequences were first amplified by primer tPAFp 1 and tPA Rp2 (refer to table 2 for primer sequence) primers. The PCR conditions use for this reaction are as follows: Hot start, complete denaturation at 95.degree. C. for 5 minutes, denaturation at 95.degree. C. for 45 seconds, annealing at 55.degree. C. for 45 seconds, extension at 72.degree. C. for 4 minute, a total no of 28 cycles and a final extension of 72.degree. C. for 10 minutes for the complete amplification of incomplete PCR products. Thus primers used for this reaction tPAFp 1 contains Xho I restriction site at its 5' end and tPARp 2 contains Not I restriction site. Obtained PCR product was digested with the Xho I and Not I restriction enzymes and ligated in to pET 23-d. Final construct formed by this process was named as pET 23-d tPA (refer to FIG. 2F), and sequenced to validate the tPA open reading frame. In order to make N-terminal (N_EGF_tPA) and C-terminal (tPA_EGF) fusions, a simple restriction digestion and ligation scheme was followed. To make both the constructs in a single step, pET23-d tPA and pUC-19_N_EGF_tPA_EGF were cleaved with Xho I and BSrG I, both being unique cutters; this gave the smaller and larger fragments. Smaller fragment of pUC-19_N_EGF_tPA_EGF digestion contains N_EGF_tPA sequence, which was ligated with the lager fragment of pET23-d_tPA, step that gave the N_EGF_tPA (DNA SEQ ID 11, and corresponding protein SEQ ID 122) construct. tPA_EGF (DNA SEQ ID 12, and corresponding protein SEQ ID 123) construct was made by ligation of larger fragment of pUC-19_N_EGF_tPA_EGF with smaller fragment of pET 23-d_tPA, which gave tPA_EGF (refer to FIG. 1J) for this construction. N_EGF_tPA (refer to FIG. 1K) and tPA_EGF (refer to FIG. 2G) were digested with the Xho I and Not I restriction enzymes and the isolated insert fragment was ligated into pPIC-9K, where construct was placed in-frame to the .alpha.-secretory signal sequence. All these constructs were expressed in Pichiapastrois (GS115) under the influence of methanol inducing promoter located in the vector after integration to the host genome.

TABLE-US-00002 TABLE 2 Primers used for the various EGF 4, 5, 6 and tissue plasminogen activator gene fusion construct preparations. SEQ S. ID Primer No. Nos. Name Primers Sequence 1 SEQ tPA_Fp 1 5' GGATAACTCGAGAAAAGAGAGGCTCAAGAGATTCATGCTA- ID 71 GATTCAGA 3' 2 SEQ tPA Rp 2 5' TCATATCGCGGCCGCTGGTCTCATGTTATCTCTGATCCAGTCCA 3' ID 72 3 SEQ Fin Fp 1 5' GGATAACTCGAGAAAAGAGAGGCTCAAGAGATTCATGCTA- ID 73 GATTCAGA 3' 4 SEQ Fin Rp2 5' GGCTCTAAAGCAAGGGTCAACTGATTTAACTGGAACAC- ID 74 TATG 3' 5 SEQ EGF Fp3 5' CATAGTGTTCCAGTTAAATCAGTTGACCCTTGCTTTAGAGCC 3' ID 75 6 SEQ EGF RP 4 5 AGCTCTGGTTCCGGAATCACAGTCAGTACCTA- ID 76 TATGTCTTGCCAA 3 7 SEQ K1 Fp 5 5' TTGGCAAGACATATAGGTACTGACTGTGATTCCGGAACCA- ID 77 GAGCT 3' 8 SEQ CD Rp 2 5' TCATATCGCGGCCGCTGGTCTCATGTTATCTCTGATCCAGTCCA 3' ID 78 9 SEQ Fg Fp 1 5' GGATAACTCGAGAAAAGAGAGGCTCAAGAGATTCATGCTA- ID 79 GATTCAGA 3' 10 SEQ Fg Rp2 5' TCTAAAGCAAGGGTCAACTGATTTAACTGGAACACTATGA- ID 80 CA 3' 11 SEQ EFI Fp3 5' TGTCATAGTGTTCCAGTTAAATCAGTTGACCCTTGCTTTAGA 3' ID 81 12 SEQ EFI RP 4 5' ATCACTGTTTCCGGAATCACAATCAGTACCAATATGTCTTGCC ID 82 AA 3' 13 SEQ K2 Fp 5 5' TTGGCAAGACATATTGGTACTGATTGTGATTCCGGAAACAGTG ID 83 AT 3' 14 SEQ K2CD Rp 5' TCATATCGCGGCCGCTGGTCTCATGTTATCTCTGATCCAGTCCA 3' ID 84 6 15 SEQ N_EtPA 5' GGATATCTCGAGAAAAGAGTTGACCCTTGCTTCAGAGCCAAC 3' ID 85 Fp1 16 SEQ N_EtPA 5' AAAGTAACAATCACTATTTGACTTGACTGGAACACTATGACA 3' ID 86 Rp 2 17 SEQ EK2 CD 5' TGTCATAGTGTTCCAGTCAAGTCAAATAGTGATTGTTACTTT 3' ID 87 Fp 3 18 SEQ K2 CD Rp 5' TCATATCGCGGCCGCTGGTCTCATGTTATCTCTGATCCAGTCCA 3' ID 88 4 19 SEQ Finger 5' GGATAACTCGAGAAAAGAGAGGCTCAAGAGATTCATGCTA- ID 89 Fp1 GATTCAGA 3' 20 SEQ Finger Rp 5' AAAGTAACAATCACTATTTGACTTGACTGGAACACTATGACA 3' ID 90 2 21 SEQ K2 CD Fp 5' TGTCATAGTGTTCCAGTCAAGTCAAATAGTGATTGTTACTTT 3' ID 91 3 22 SEQ EGF Rp 4 5' CCATATCGCGGCCGCTTAACCTGAGTCACAATCTGTTCCAATA 3' ID 92 23 SEQ EGF CD 5' GTTGACCCTTGCTTTAGAGCCAACTGTGAATACCAATGCCAG 3' ID 93 Fp1 24 SEQ EF CD Rp 5' CTGGCATTGGTATTCACAGTTGGCTCTAAAGCAAGGGTCAAC 3' ID 94 2 25 SEQ K2 CD Fp 5' GTTGACCCTTGCTTTAGAGCCAACTGTGAATACCAATGCCAG 3' ID 95 3 26 SEQ K2 CD Rp 5' TTTATACGCGGCCGCTGGTCTCATGTTATCTCTGATCCAGT 3' ID 96 4 27 SEQ Met rep 5' CATGAACCACATAGATGTCAAGTATTCTGCAACCAGACTG 3' ID 97 Val Fp 28 SEQ Met rep 5' CAGTCTGGTTGCAGAATACTTGACATCTATGTGGTTCATG 3' ID 98 Val Rp 29 SEQ Met rep 5' CATGAACCACATAGATGTCAAGCATTCTGCAACCAGACTG 3' ID 99 Ala Fp 30 SEQ Met rep 5' CAGTCTGGTTGCAGAATGCTTGACATCTATGTGGTTCATG 3' ID Ala Rp 100 31 SEQ Met rep 5' CATGAACCACATAGATGTCAACAATTCTGCAACCAGACTG 3' ID Glu Fp 101 32 SEQ Met rep 5' CAGTCTGGTTGCAGAATTGTTGACATCTATGTGGTTCATG 3' ID Glu Rp 102 33 SEQ T 115 N 5' CAGGGAATCTCATATAGAGGTAATTGGTCTACAGCTGAGT 3' ID Fp 103 34 SEQ T 115 N 5' ACTCAGCTGTAGACCAATTACCTCTATATGAGATTCCCTG 3' ID Rp 104 35 SEQ N129 Q 5' AATGTACTAACTGGCAATCTTCCGCTTTGGC 3' ID Fp 105 36 SEQ N129 Q 5' GCCAAAGCGGAAGATTGCCAGTTAGTACATT 3' ID Rp 106 37 SEQ KH Fp 1 5' GGATAACTCGAGAAAAGAGAGGCTCAAGAGATTCATGCTA- ID GATTCAGA 3' 107 38 SEQ KH Rp 2 5' AGCAGCGGCAGCAGCAAAAATGGCAGCCTGCCA 3' ID 108 39 SEQ KH Fp 3 5' GCTGCTGCCGCTGCTTCCCCTGGAGAGAGATTCCTTT 3'' ID 109 40 SEQ KH Rp4 5' TCATATCGCGGCCGCTGGTCTCATGTTATCTCTGATCCAGTCCA 3' ID 110

Example 4

Construction of Various Hybrid Genes Between Tissue Plasminogen Activator and EGF 4,5,6 Domains of Human Thrombomodulin

(i) Construction of Inter-Domain EGF 4,5,6-tPA Construct:

Tissue plasminogen activator contains different domains, in the following order: N-terminal peptide-finger domain-EGF like domain-kringle 1-kringle 2-catalytic domain. A new non-natural, hybrid design was constructed at gene level, where the intrinsic EGF domain/s of tPA were replaced by the EGF 4,5,6 domains of thrombomodulin. These constructs were made by the overlap extension PCR strategy used earlier for the generation of other hybrid genes.

(a) Construction of a Hybrid Gene Block, where the Intrinsic EGF Domain of tPA was Replaced with EGF4,5,6 Domains of Human Thrombomodulin:

In order to make this construct, pET 23-d_tPA (SEQ ID 9, and corresponding protein SEQ ID 120) was taken as reference where intrinsic egf coding region started from 187 bp to 297 bp. In the first step, the finger domain encoding DNA was isolated by the use of following primer Fin Fp 1 and Fin Rp2 (refer table 2 for the sequence of these primers), where upstream primer contains a Xho I restriction site at its 5' terminus, while on the other hand, the second primer contains downstream sequence encoding for finger domain with overlapping sequence for the 4.sup.th domain of EGF4,5,6 domains. The PCR conditions were as follows: Complete denaturation at 95.degree. C. for 5 minutes, followed next by 28 cycles: 95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute, and a final extension done at 72.degree. C. for 10 minutes. In a second PCR, EGF 4,5,6 domain segment was amplified where EGF Fp 3 and EGF Rp 4 refer table 2 for the sequence of these primers) primer set was used. Primer EGF Fp3 contains downstream sequence of finger domain and 4.sup.th domain of EGF; on the other hand, the downstream primer EGF Rp 4 contains overlapping sequence of kringle 1 at its 5' terminal end. The PCR conditions were as follows: Complete denaturation at 95.degree. C. for 5 minutes, followed next by 28 cycles: 95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute, and finally ending with an extension segment at 72.degree. C. for 10 minutes. Gene block obtained by this set of primers contains finger domain sequence at 5' terminus and overlapping sequence of kringle 1 at its 3' end. In a third PCR reaction, the sequence encoding for kringle 1 to the end of the catalytic domain was selectively amplified by the use of K1 Fp 5 and CD Rp 6 (refer table 2 for the sequence of these primers) set of primers. Primer K1 Fp1 contains overlapping sequence for the 6.sup.th domain of EGF4,5,6 at its 5' terminus, and primer CD Rp 6 contains a termination codon and a Not I restriction site at the 5' end. PCR condition were as follows: Complete denaturation at 95.degree. C. for 5 minutes, followed for the next 28 cycles which were: 95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 3 minutes, and final extension done at 72.degree. C. for 10 minutes for all partial-length fragments' synthesis completion. Gene block obtained in this reaction contains the EGF 6.sup.th domain overlapping sequence at 5' terminus and also the catalytic domain encoding sequences, a termination codon and a Not I site at its 3' end. All the three PCR products were gel-purified and subjected in to a single-pot SOE for the amplification of the complete hybrid gene construct, where the order of assembly was to be as follows: finger domain-EGF4,5,6 domains-kringle 1-kringle 2 and tPA (refer to FIG. 1Q and FIG. 2J). catalytic domain. This was carried out with the help of Fin Fp 1 and CD Rp 6 (refer table 2 for the sequence of these primers) set of primers. Final PCR conditions were as follows: Complete denaturation at 95.degree. C. for 5 minutes, with the next 28 cycles being: 95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 4 minutes, and final extension (single segment) at 72.degree. C. for 10 minutes. This gene block was purified by gel extraction and digested with Xho I and Not I enzymes, and ligated with similarly digested and purified pET 23-d vector, and cloned into E. coli XL Blue as described before. A few random clones were subjected to Sanger's sequencing for the complete insert/gene block, and validated to contain the correct in-frame incorporation of EGF 4,5,6 domains into that of tPA (DNA SEQ ID 13, and corresponding protein SEQ ID 124). This gene block was then transferred to pPIC-9K vector, cloned into Pichia pastoris, as before, and screened for high levels of plasminogen activator activity as described under `general methods used in Examples`.

(b) Construction of Inter-Domain tPA and EGF Hybrid Gene Construct Where Intrinsic EGF and Kringle 1 Domains of tPA were Replaced with EGF 4,5,6 Domains of Human Thrombomodulin:

In order to make this construct, three different PCRs were done separately, where resultant gene blocks contained overlapping sequences at the terminals of each gene block, and they were then amplified in a single-pot SOE reaction in order to make the following hybrid construct: tPA finger domain-EGF4,5,6-tPAkringle 2-tPA catalytic (serine protease) domain (refer to FIG. 1R and FIG. 2H). In order to make this construct, pET 23-d_tPA (SEQ ID 9, and corresponding protein SEQ ID 120) was taken as the template where intrinsic egf- and kringle 1-encoding nucleotide region starts from 187 bp to 564 bp. In the first step, finger domain encoding segment was isolated by the use of the following primers: FgFp 1 and Fg Rp2 (refer table 2 for the sequence of these primers), where the upstream primer contain as Xho I restriction site at 5' terminus, while on the other hand, the second primer contains downstream sequences of finger domain and overlapping sequence of the 4.sup.th domain of EGF4,5,6 domains. The PCR condition were as follows: Complete denaturation at 95.degree. C. for 5 minutes, with the next 28 cycles being: 95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute, and final extension being done at 72.degree. C. for 10 minutes. In a second PCR, EGF 4,5,6 domains were amplified with primers EFI Fp 3 and EFI Rp 4 (refer table 2 for the sequence of these primers). Primer EFI Fp 3 contained downstream sequence of finger domain and 4.sup.th domain of EGF while on the other hand the downstream primer contained overlapping sequence of kringle 2 at its 5' terminal end. PCR conditions were as follows: Complete denaturation at 95.degree. C. for 5 minutes, and next 28 cycles were: 95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute and final extension done at 72.degree. C. for 10 minutes. The Gene block obtained by this set of primers contained finger domain sequence at the 5' terminus, and overlapping sequence of kringle 2 at its 3' end. In a third PCR reaction, sequences starting from kringle 2 to the tPA catalytic domain were amplified by the use of K2 Fp 5 and K2 CD Rp 6 (refer to table 2 for the sequence of these primers), a set of two primers. Primer K2 Fp5 contains overlapping sequence of 6.sup.th domain of EGF 4,5,6 at its 5' terminus and primer K2 CD Rp6 contains termination codon and Not I restriction site at the 5' end. PCR condition were as follows: A `hot start` with complete denaturation at 95.degree. C. for 5 minutes, with the next 28 cycles being -95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 3 minute--and a final extension being done at 72.degree. C. for 10 minutes. The gene block obtained in this reaction contained the 6.sup.th domain overlapping sequence at its 5' terminus and the catalytic domain encoding sequence, followed by a termination codon, and a Not I site at its 3' end. All the three PCR products were gel-purified and subjected to single-pot SOE reaction with the Fg Fp 1 and K2CD Rp 6 set of primer (refer table 2 for the sequence of these primers) for the amplification for obtaining the complete hybrid gene construct, where the order of assembly of the various protein encoding segments was as follows (finally confirmed by DNA sequencing after cloning): finger domain-EGF4,5,6 domains-kringle 2 and catalytic domain (DNA SEQ ID 14, and corresponding protein SEQ ID 126). Final PCR conditions were as follows: Complete denaturation at 95.degree. C. for 5 minutes, next 28 cycles being -95.degree. C. for 45 seconds, annealing at 48.degree. C. for 45 seconds, extension at 72.degree. C. for 4 minutes, and a final extension done at 72.degree. C. for 10 minutes. This gene block was purified by gel extraction and digested with Xho I and Not I enzymes and ligated with pET 23-d vector, and cloned in E. coli XL Blue, wherein the complete gene block was then sequenced and validated for the correct in-frame incorporation of EGF 4,5,6 domains into the partially truncated tPA gene. This final, hybrid gene-block was transferred to pPIC-9K vector and checked for its ORF expression in pichia pastoris using standardized procedures as described before.

(c) Construction of Hybrid Gene Blocks Encoding for Truncated Versions of tPA where EGF 4,5,6 Encoding Segments were Fused in-Frame at the N-Terminal and C-Terminal Encoding Ends of the Former:

These constructs were prepared by the help of previously made pET-23-d N_EGF_tPA (SEQ ID 11, and corresponding protein SEQ ID 121) and pET 23-d_tPA_EGF (SEQ ID 12, and corresponding protein SEQ ID 123) as templates. In both constructs, the intrinsic egf and kringle 1 domains were removed with the help of the overlapping PCR scheme. In order to remove intrinsic egf and kringel 1 domains of tPA from N_EGF_tPA (refer to FIG. 1.N) construct, two sets of primers were designed. The first set of primers, N_EtPAFp 1 and N_EtPA Rp2 (refer table 2 for the sequence of these primers) were used for the amplification of contiguous nucleotide sequences of EGF4,5,6 domains and tPA finger domain. In this case, upstream primer contained 4.sup.th domain sequence of EGF and Xho I restriction site at its 5' end, and primer N_EtPA Rp2 contained overlapping sequence of tPA kringle 2. A second set of primers, namely EK2 CD Fp3 and K2CD Rp 4 (refer table 2 for the sequence of these primers) was used for the amplification of kringle 2 and catalytic domain of tPA. Primer EK2 CD Fp 3 contained downstream overlapping sequence of finger domain at 5' end and other primer contains downstream sequence of tPA catalytic domain and a Not I restriction site (PCR conditions: Hot start, 95.degree. C. for 5 minutes, 28 cycles of 95.degree. C. for 45 seconds, 52.degree. C. for 45 seconds, 72.degree. C. for 2 minutes, and a final extension at 72.degree. C. for 10 minutes). Resultant gene block obtained in this reaction contained tPA finger domain overlapping sequence at its 5' end and a Not I restriction site at its 3' end. Both PCR products were gel-purified and subjected for the construct of a complete gene block where intrinsic egf and kringle 1 were deleted with the help of primers N_EtPA Fp1 and K2 CD Rp4 (refer table 2 for the sequence of these primers), primer set. The resultant gene block was purified and digested with the Xho I and Not I restriction enzymes and ligated into pET 23-d vector, sub cloned in E. coli, and DNA-sequenced for the correct in-frame joining after removal of egf and kringle 1 from the tPA (DNA SEQ ID 15, and corresponding protein SEQ ID 126; FIG. 2.I) encoding gene-block. After validation by sequencing for the correct open reading frame of gene block, this cassette was ligated into pPIC-9K, transformed into Pichia as before, screened for activity, and checked for extracellular expression. In a similar way, intrinsic egf and kringel 1 were deleted from the tPA encoding gene block in the construct, tPA_EGF (see FIG. 1P and FIG. 2H). Here, pET 23-d-tPA_EGF plasmid DNA was used as template for the amplification of truncated tPA nucleotide sequence. Using the primer set, Finger Fp 1 and Finger Rp2 (refer table 2 for the sequence of these primers) for the amplification of finger domain, where Finger Fp 1 primer contained a Xho I restriction site at its 5' end and the other primer, Finger Rp2 contained downstream sequence of finger domain and overlapping sequence of kringle 2 of tPA. PCR conditions were as follows: complete denaturation at 95.degree. C. for 5 minutes, followed by 30 cycles of: denaturation at 95.degree. C. for 45 seconds, annealing at 44.degree. C. for 45 seconds and extension 72.degree. C. for 1 minute, ending with a final extension at 72.degree. C. for 10 minutes. This gave the gene block containing tPA finger domain over-lapping sequences, followed by an Xho I restriction site at its 5' end, and at its 3' end contained kringle 2 overlapping sequences. A second primer set was used for the amplification of kringle2-catalytic encoding domain and EGF 4,5,6 domains. The first primer, K2 CD Fp 3 (refer table 2 for the sequence of these primer), contained overlapping sequences to downstream end of tPA finger domain and a small part of kringle 2; on the other hand, the second primer EGF Rp 4 (refer table 2 for the sequence of these primer) contained downstream sequence of EGF and a Not I restriction site. PCR conditions were as follows: complete denaturation at 95.degree. C. for 5 minutes, and 30 cycles of: denaturation at 95.degree. C. for 45 seconds, annealing at 44.degree. C. for 45 seconds and extension 72.degree. C. for 1 minute, and final extension at 72.degree. C. for 10 minutes. Both gene blocks were purified from gel and subjected to the overlap extension reaction in presence of primers Finger Fp1 and EGF Rp 4 (see Table 2 for the sequence of these primers), and the PCR product obtained from this was gel purified and ligated into pet 23-d in (DNA SEQ ID 16, and corresponding protein SEQ ID 127) E. coli as before, and sequenced to validate the complete gene block. Finally this gene block was ligated into pPIC-9K and transformed into Pichia pastoris for screening of expression and functional properties as described before.

(d) Incorporation of Different Mutations in Various EGF Containing Tissue Plasminogen Activator Gene Constructs:

In different fusion constructs of EGF 4,5,6 described above, and tPA, following amino acid changes were made: Threonine 115.sup.th amino acid changed by aspargine (T 115 N), Aspargine 129.sup.th amino acid changed by glutamine (N 129 Q) and KHRR encoding region of tPA 308-311 is replaced by a tetra-Alanine stretch of mutations (KHRR (308-311)AAAA) (DNA SEQ ID 20, and corresponding protein SEQ ID 128). These mutations are known to confer additional fibrin specificity to the resultant molecule, as well as increase the in vivo half life of the tPA (Keytt et al., 1994). For introduction of theses mutations, we used the site directed mutagenesis approach (refer to the `methods used in examples`) and incorporated these changes in the oxidation resistant (where the 129.sup.th methionine of EGF4,5,6 domain was replaced valine/alanine/glutamine) gene templates also. The following primers were used for the site directed mutagenesis: 1. T 115 N Fp and T115 N Rp (refer table 2 for sequence of these primers) 2. N129 Q Fp an N129 Q Rp. (refer table 2 for sequence of these primers)

In case of tPA mutations KHRR (where residues 308-311 of tPA were replaced by the tetra Alanine amino acid residues) overlapping extension PCR (refer to the methods used in examples) using KHFp 1 and KHRp 2 as end-primers (refer to table 2 for sequence of these primers i.e. at Serial Nos. 37 and 38) were used for the amplification of the 1-933 bp long stretch of polynucleotide, where KHFp 1 primer contains a Xho I restriction site, and upstream sequence of tPA; on the other hand, the primer KHRp2 contains a four-alanine mutation at its 5' end. The following PCR conditions were used: Hot start, complete denaturation at 95.degree. C. for 5 minutes, followed by denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1.5 minute, with a total of 28 cycles, and a final extension of 72.degree. C. for 10 minutes for the complete amplification of any incomplete PCR products. Finally, the gene block obtained by this method contained a Xho I restriction site at the 5' end, and its 3' end contained a tetra-alamine mutation. In another set of PCR reaction, KHFp3 and KHRp 4 (refer table 2 for sequence of these primers) were used for the amplification of the DNA between 918.sup.th by to 1617.sup.th bp of tPA. Primer KHFp 3 contains a tetra alanine mutation at it 5' end, while the second primer, KHRp 4 contains a Xho I restriction site. Following PCR condition were used for the reaction: Hot start, complete denaturation at 95.degree. C. for 5 minutes, followed by denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1.5 minute, with a total of 28 cycles, and a final extension of 72.degree. C. for 10 minutes for the complete amplification of any incomplete PCR products. The resultant gene block contains tetra-alanine mutation at its 5' end, and its 3' end contains a Not I restriction site. Both PCR products were gel purified and mixed into a common `Overlap` PCR reaction single pot, where KHFp1 and KHRp 4 (refer to table 2 for the sequence of these primers) were used for the amplification of the whole gene block. Finally, the obtained gene block was transferred to pET 23-d and after validation of DNA sequence and correct open reading frame, transferred into pPIC9K where the hybrid polypeptide was expressed checked by standard conditions in Pichia (please refer to `methods used in examples`).

Example 5

Construction of Hybrid Genes Between Staphylokinase and Thrombomodulin Domains EGF 4,5,6

Construction of SAK_EGF and EGF_SAK Encoding Hybrid Gene Blocks:

For the construction of EGF-SAK fusions, EGF 4,5,6 PCR block was isolated with the help of N_EGF_SAK Fp1 and N_EGF_SAK Rp 2 set (refer table 3 for the sequence of these primers) of primers, where pET 23-d_EGF 4,5,6 (Seq ID 2, and corresponding protein SEQ ID 111) was used as template. Here, N_EGF_SAK Fp 1 contained Xho I restriction site at its 5' end, while N_EGF_SAK Rp 2 contained overlapping sequence of SAK nucleotides at the 5' end. PCR conditions were as follows: complete denaturation at 95.degree. C. for five minutes in the 1.sup.st (hot start) cycle, with the next 28 cycles being: denaturation at 95.degree. C. for 45 seconds, annealing at 50.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute, and final step was at 72.degree. C. for 10 minutes for completion of any uncompleted PCR products. The PCR product contained a Xho I restriction site at its 5' end, and 3' end contained overlapping sequence of SAK. In a second step, SAK PCR block was amplified with the help of N_EGF_SAK Fp3 and N_EGF_SAK Rp 4 set of primers and pGMEX_SAK (SEQ ID 17, and corresponding protein SEQ ID 130) construct was used as template. In this reaction, primer N_EGF_SAK Fp 3 contained downstream overlapping sequence of the 6.sup.th domain of EGF 4,5,6; N_EGF_SAK Rp 4 contained a termination codon followed by a Not I restriction site. PCR conditions were as follows: complete denaturation at 95.degree. C. for five minutes in the 1.sup.st cycle, followed next by 28 cycles of denaturation at 95.degree. C. for 45 seconds, annealing at 50.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minute, and final step at 72.degree. C. for 10 minute for completion of uncompleted PCR products. This gave the gene block which had 6.sup.th EGF domain overlapping sequences at the 5' end, and 3' end contained a termination codon followed by a Not I restriction site. Both the PCR products were gel-extracted and purified with the help of gel purification kit and mixed into a single SOE PCR reaction in 1:1 molar ratio with N_EGF_SAK upstream Fp 1 and N_EGF_SAK Rp 4 downstream primers being used for the hybrid gene intermediate (obtained by overlap extension) amplification. As a result of this, we got a contiguous gene fragment which contained the N_EGF_SAK (DNA SEQ ID 18, and corresponding protein SEQ ID 118) sequence. This gene block was then digested with Xho I and Not I, and transferred into pPIC-9K vector. DNA sequencing validated in-frame fusion expected in the EGF_SAK (refer to FIG. 1T) construct and absence of any other mutations. This construct was transformed into the GS 115 strain of Pichia pastoris and checked for expression under the influence of the alcohol oxidase promoter after integration into host genome, as before.

The construction of SAK_EGF (refer to FIG. 1. S) construct was carried out in a similar way where EGF4,5,6 domain segment was fused at the C-terminal end of SAK. In the first step, SAK gene block was isolated with the help of SAK_EGF Fp 1 and SAK_EGF Rp 2 set of primer. Primer SAK_EGF Fp 1 contains aXho I restriction site at the 5' end; on the other hand SAK_EGF Rp 2 contains overlapping sequence of 4.sup.th domain of EGF 4,5,6. The resultant gene block contains Xho I site among its upstream sequences and overlapping 4.sup.th domain EGF sequence at its downstream ones. In a second step, SAK gene block was isolated by the use of SAK_EGF Fp 3 and SAK_EGF Rp 4 primers, where the SAK_EGF Fp3 contains overlapping sequence of SAK, and SAK_EGF Rp 4 contains termination codon and a Not I restriction site. The gene block isolated from PCR using these set of primers contained SAK overlapping sequence upstream, and termination codon and Not I site at its downstream end. Both gene blocks were purified from agarosegel and mixed into a single SOE reaction with the SAK_EGF Fp 1 and SAK_EGF Rp 4 in order to obtain the complete SAK_EGF (DNA SEQ ID 19, and corresponding protein SEQ ID 119) gene block. Thus, the final PCR product gave a hybrid gene block containing the SAK_EGF sequence which was purified from gel and digested with Xho I and Not I restriction enzymes and transferred into pPIC-9K, after sequencing correct in-frame validation done. This construct transform into GS 115 strain of Pichia pastoris where, after genome integration by standardized procedures, its expression (which was checked by SDS-PAGE as well as casein-overlay plasminogen activator assays) under the influence of the alcohol oxidase promoter situated in the expression plasmid pPIC-9K. Whole SAK_EGF construct was incorporated in-frame upstream of the .alpha.-secretory signal sequence which helps in transport of hybrid gene product across the membrane into the medium.

Bacterial Expression of N_EGF_SAK and SAK_EGF:

The above-described N_EGF_SAK and SAK_EGF DNA constructs were also expressed under the influence of IPTG inducible lac promoter. In order to make these constructs, the pPIC-9K_N_EGF_SAK and pPIC-9K_SAK_EGF plasmids were used as template.

(i) Construction of Bacterial Expression Cassette of N_EGF_SAK Gene Block:

N_EGF_SAK gene block was first amplified with the help of BacFp 1 and BacRp 2 primers by using pPIC-9K N_EGF_SAK as template. Bac Fp1 primer contained a Nco I site at its 5' end, to help in providing a required AUG codon in the beginning of the gene block, and provide the initiator Met residue encoding codon in the mRNA. Primer BacRp 2 contained a Xho I restriction site to facilitate in-frame introduction of 6 histidine amino acid-encoding nucleotides at the end of the transcribed mRNA before the ter codon that helps in detection of gene product and its purification. This gene block was isolated from the gel and digested with Nco I and Xho I restriction enzymes, finally ligated with T7 promoter based pET 23-d vector and transformed into E. coli. These two sites, which are unique, help the hybrid gene construct's insertion under the influence of T7 RNA polymerase promoter (Studier and Moffatt, 1986). This construct pET 23-d N_EGF_SAK_SAK was transformed into XL 1B cells (rec A.sup.- and end A.sup.-) where plasmid propagates and sequenced. Now this plasmid transfer to BL21 (DE3) cells (expression host), where induction of T7 RNA polymerase was done by IPTG and expression in intra-cellular form as inclusion bodies (please refer to `methods used in examples` for expression conditions, isolation of inclusion bodies and refolding protocols). Finally, the refolded protein was obtained in highly purified form through chromatography and subjected to activity assays.

(ii) Construction of SAK_EGF Gene Block for Bacterial Expression:

SAK_EGF construct was prepared by the help of SAK_EGF Fp1 and SAK_EGF Rp 2 primers, where pPIC-9K_SAK_EGF was taken as the template for amplification. The primer SAK_bac Fp1 contained a Nco I restriction site at the 5' end to help in the introduction of a AUG codon; on the other hand, SAK_bac Rp2 contained a Xho I restriction site to facilitate the introduction of 6 histidine amino acid-coding nucleotides prior to the termination codon at the downstream end of the intended SAK_EGF gene-construct. The PCR conditions were as follows: complete denaturation at 95.degree. C. for five minutes in 1.sup.st cycle, next 28 cycles were: denaturation at 95.degree. C. for 45 seconds, annealing at 50.degree. C. for 45 seconds, extension at 72.degree. C. for 1.5 minute, and a final step 72.degree. C. for 10 minute for completion of partial-length PCR products. Resultant gene block contained a Nco I site at its upstream end, and Xho I site present at its downstream end, and was purified by gel extraction and ligated into pET 23-d vector. This ligation product was transformed into E. coli XL1B (rec A.sup.- and end A.sup.-) cells by electroporation and the resultant plasmids sequenced for the validation of correct open reading frame. Propagation of plasmid was done in XL1B cells but for expression of hybrid gene product plasmid was transformed into E. coli BL 21 (DE 3) cell (Novagen Inc.). Finally, protein was expressed in presence of IPTG, which forms inclusion bodies which were isolated and refolded in presence of oxidized and reduced glutathione as detailed under `methods used in examples`, and subjected to plasminogen activator and thrombin inhibition activity assays as for the EGF_SAK construct, above.

(iii) Introduction of Thrombin Cleavable Sequences at the Junction of EGF and SAK:

Thrombin cleavable sequences were introduced at the junction of EGF and SAK in the N-terminal fusion construct. For this construct, EGF_SAK DNA in the plasmid pET-23-d was taken as template for EGF and SAK amplification. Thrombin cleavable primers were designed. For EGF amplification, named E 4 Fp 1 and E6 Rp 2 (refer to table 3 for sequence of these primers at Serial No's. 13 and 14) primers were used. E4 Fp 1 primer contains Xho I restriction site and upstream sequence of EGF4,5,6 domains at its 5' end; on the other hand E6 Rp2 contains downstream sequence of EGF 4,5,6 and thrombin cleavable nucleotide sequence at its 5' end. Following PCR conditions were used for the amplification: complete denaturation at 95.degree. C., followed by next 28 cycles: 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 second, extension at 72.degree. C. for 1 minutes, and finally, an extension for a further 10 min at 72.degree. C. Gene block obtained by this PCR reaction contains sequence encoding in-frame for the 4.sup.th domain of EGF at its 5' end, and its 3' end contains downstream sequence of EGF4,5,6 and a thrombin cleavable sequence. In a second PCR reaction, the SAK gene block was amplified with the help of TCS SAK Fp 3 and TCS SAK Rp4 (refer to table 3 for sequence of these primers i.e. S. No. 15,16). TCS SAK Fp3 contains a thrombin cleavable sequence and upstream sequence of SAK nucleotide; similarly the other primer TCS SAK Rp4 contains downstream sequence of SAK and termination codon, followed by a Not I restriction site. The resultant, amplified gene block contains thrombin cleavable nucleotide sequence at its 5' end and termination codon and Not I site situated at its 3' end. The following PCR conditions were used for the amplification of the SAK gene block: complete denaturation at 95.degree. C., followed by next 28 cycles as follows: denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 1 minutes, and final extension for a further 10 min at 72.degree. C. Both the PCR products were gel-eluted and subjected in a common Overlap Extension PCR reaction for the amplification of EGF_TCS_SAK gene block with the help of E4 Fp 1 and TCS SAK Rp 4 (refer to table 3 for sequence of these primers i.e. at S. No. 13 and 16 of the table) under the following conditions: complete denaturation at 95.degree. C., followed by denaturation at 95.degree. C. for 45 seconds, annealing at 45.degree. C. for 45 seconds, extension at 72.degree. C. for 2 minutes for 28 cycles and a final extension for a further 10 min at 72.degree. C. The obtained gene block contained a Xho I restriction site at its 5' end and a Not I site at its 3' end. This PCR product was digested with Xho I and Not I enzymes, and ligated into pPIC-9K after being sequenced for correct in-frame insertion of thrombin cleavable sequence subsequent to cloning in pET 23-d.

TABLE-US-00003 TABLE 3 Primers used for the various EGF 4, 5, 6 and SAK fusion construct preparations. SEQ ID Primer S No. Nos. Name Primer Sequence 1 SEQ N_EGF_S 5' ATGGATCTCGAGAAAAGAGTGGACCCGTGCTTCAGA 3' ID AK Fp 1 55 2 SEQ N_EGF_SAL 5' ATATTTTCTTTGTCGAATGAACTTGACATGCCGGAGTCACA ID Rp 2 GTC 3' 56 3 SEQ N_EGF_SAK 5' GACTGTGACTCCGGCATGTCAAGTTCATTCGACAAAGGAAA ID Fp3 ATAT 3' 57 4 SEQ N_EGF_SAK 5' TTATATCGCGGCCGCTTATTTCTTTTCTATAACAACCTTT 3' ID AK Rp 4 58 5 SEQ SAK_EGF 5' ATCCCTCTCGAGAAAAGATCAAGTTCATTCGACAAAGGAA 3' ID Fp 1 59 6 SEQ SAK_EGF 5' AGTTGGCTCTGAAGCACGGGTCCACGGGCTCTTTCTTTTCTA ID Rp 2 TAACAACCTT 3' 60 7 SEQ SAK_EGF 5' AAGGTTGTTATAGAAAAGAAAGAGCCCGTGGACCCGTGCTT ID Fp 3 CAGAGCCAACT 3' 61 8 SEQ SAK_EGF 5' TTTTACGCGGCCGCTCCTGAGTCACAGTCTGTGCCAATGT 3' ID Rp 4 62 9 SEQ BacFp 1 5' ATATAGGCCATGGGTGGACCCGTGCTTCAGAGCCAACT 3' ID 63 10 SEQ BacRp 2 5' CCTATATCTCGAGTTTCTTTTCTATAACAACCTTT 3' ID 64 11 SEQ SAK_bac 5' ATGGATCCATGGTCAAGTTCATTCGACAAAGGAAAATATA 3' ID Fp1 65 12 SEQ SAK_bac 5' TATATTCTCGAGTCCTGAGTCACAGTCTGTGCCAATGT 3' ID Rp2 66 13 SEQ E 4 Fp 1 5' ATGGATCTCGAGAAAAGAGTGGACCCGTGCTTCAGA 3' ID 67 14 SEQ E6 Rp 2 5' CCGACAATTCTAGGTTTAATGCCGGAGTCACAGT- ID CAGTGCCAA 3' 68 15 SEQ TCS SAK 5' GGCATTAAACCTAGAATTGTCGGATCAAGTTCATTCGATAA ID Fp 3 AGGAAAAT 3 69 16 SEQ TCS SAK 5' TTATATCGCGGCCGCTTATTTCTTTTCTATAACAACCTTT 3' ID Rp4 70

Example 6

Biological Activities of tPA-EGF and SAK-EGF Fusion Constructs

The different hybrid gene constructs of EGF and tPA, where chemically synthesized (N_EGF_tPA_EGF), hybrid tPA fusion constructs (where EGF 4,5,6 was inserted to replace the intrinsic domains of tPA i.e. egf and Kringle 1), internally deleted forms of tPA and EGF fusions (where intrinsic egf and kringle 1 were deleted and EGF 4,5,6 fused at either N and C terminii), and oxidation resistant variants of above-mentioned constructs were cloned in-frame upstream of .alpha.-secretory signal sequence of pPIC-9K vector essentially as described before. Each construct was separately checked by the restriction endonucleases and validated by DNA sequencing. All these constructs were individually transferred to Pichia pastoris (GS 115) by electroporation (please refer to `general methods used in examples` section). Individual clones were grown on BMGY and BMMY media (BMGY=1% yeast extract, 2% peptone, 1.times. glycerol, 1.times. yeast nitrogen base without amino acids and 100 mM of potassium phosphate buffer pH 5.5 and BMMY=1% yeast extract, 2% peptone, 1.times. Methanol, 1.times. yeast nitrogen base without amino acids and 100 mM of potassium phosphate buffer pH 5.5) for 5 days along with by inducing with methanol and supernatants were tested by casein overlay method for plasminogen activation ability (refer to `methods used in examples` section); apart from this, the supernatant of each positive clone tested for plasminogen activation in one-stage assay. Then each hyper-active clone was grown at one-liter level, where the presence of tPA polypeptide in each protein was validated by Western blotting, and followed by lysine affinity and ion-exchange chromatography (for detailed protocol refer to `methods used in examples`). Different fusion constructs obtained by chromatography were 92-95% pure by SDS-PAGE. These purified proteins were subjected for the plasminogen activation assays. The specific activity of each purified protein was closely similar to pichia derived native tissue plasminogen activator. However, constructs where the finger, egf, and kringle 1 and kringle 2 domains were deleted and replaced by EGF 4,5,6 domains showed comparatively weaker zones of hydrolysis by the Casein Overlay method, and also generally exhibited relatively lowered plasminogen activator activity by the quantitative micro-titer plate-based assay using plasminogen and chromogenic substrate. Moreover, the extent of stimulation in activity seen in presence of soluble fibrin in the internally deleted constructs were much lower as compared to tPA/tPA mutants where the fusions of EGF were at the former's terminii. In case of the tPA mutant (containing the Threonine 115.sup.th amino acid changed into aspargine (T 115 N), Aspargine 129.sup.th amino acid changed to glutamine (N 129 Q) and KHRR encoding region of tPA i.e. residues 308-311 being replaced by a tetra-Alanine stretch of mutations (KHRR (308-311.fwdarw.AAAA; see Example, above), the plasminogen activator activity was native-like in terms of both `basal` activity as well as its stimulation in presence of soluble fibrin. At the same time, this construct exhibited the highest thrombin inhibiting property using well defined assays (see `Methods used in Examples` section) of thrombin inhibition and protein C activation. In contrast, thrombin inhibition, as checked by the clotting time assay, wherein fibrin mesh formation in presence or absence of native tPA up to high micro molar concentrations was essentially unaltered compared to buffer controls, the addition of nanomolar concentrations of different purified chimeric constructs including the `tetra-ala` mutant above, or where EGF 4,5,6 was incorporated in different places internally or at the ends in tPA, gave significantly increased clotting time in a dose-dependent manner. The observed increase in clotting was more prominent in N_EGF_tPA_EGF construct compared to EGF domains fused at either end. This type of effect was also observed in thrombin mediated protein C activation assays, where amount of protein C generated by N_EGF_tPA_EG was 2-4 fold higher than the single EGF 4,5,6 domain containing tPA fusion constructs and the internally fused EGF-tPA constructs in general. In another set of results, where oxidation resistant forms with methionine substitutions in the EGF portion of the EGF-tPA fusions were compared for their thrombin mediated protein C activation capability, the oxidation resistant forms where methionine was replaced with Valine invariably showed 15-20% higher protein C activation.

In a similar way staphylokinase and EGF fusion constructs were prepared and expressed in Pichia pastoris as well as in Bl21 DE3 cells. Streptokinase expression in Pichia pastoris and glycosylation of its 26.sup.th amino acid have been reported in literature, where this glycosylation seems to hamper the plasminogen a activation function, but if cultures were grown in presence of tunicamycin containing media, the same plasminogen activation profile like native bacterial purified SAK is obtained. Keeping this fact in consideration, the same gene blocks were prepared and designed for both bacterial and pichia expression. Using SAK and EGF fusion gene blocks for SAK-EGF fusions at the N-terminal and C-terminal ends, the initial expression was carried out in E. coli BL 21 DE cells where they the polypeptide synthesis was induced by 1 mM concentration of IPTG (please refer to `methods used in examples`). Finally, EGF_SAK and SAK_EGF were obtained in form of inclusion bodies where refolding conditions for these polypeptides were optimized with different ratio of oxidized and reduced glutathione as well as other solution conditions (please refer to `methods used in examples`); side by side, both the constructs were expressed in Pichia pastoris in presence of tunicamycin. Finally, fusion polypeptides obtained through both methods were purified and subjected to the plasminogen activation, thrombin inhibition and protein C activation assays. Plasminogen activation of pichia-derived, on the one hand, and refolded fusion constructs obtained from E. coli IBs, on the other, were essentially the same, but in case of thrombin inhibition and protein C activation the pichia derived EGF_SAK and SAK_EGF polypeptides were only approx. 2-fold more active compared to the E. coli derived protein. The underlying reason viz. methionine oxidation of EGF in presence of oxidizing conditions particularly during the refolding was validated by quantitative amino acid analysis. The oxidation and activity dimunition problem was solved by putting valine in place of methionine by site directed mutagenesis in the EGF section of the hybrids, as described in the earlier Examples, above.

ADVANTAGES OF THE PRESENT INVENTION

The present invention has advantages over anti-thrombin thrombolytics used in the art. In the past, attempts were made to make anti-thrombin thrombolytics where Kringle of tissue plasminogen activator, peptidic sequences containing arginine (R), glycine (G) and aspartic (D), and the anti-thrombin part of hirudin were introduced at the C-terminal of staphylokinase, the premise being that this form of staphylokinase would help in platelet inhibition by the `RGD peptide`, increased fibrin affinity by the tPA derived kringle, and the thrombin inactivating hirudin part conferring the anti-thrombin property through inhibition of the transiently formed thrombin at the early stages (Szemraj, Walkowiak et al. 2005). Efforts were also made to combat re-occlusion problem after thrombolysis through recombinant lipoprotein associated cogulation inhibitors (LACI) to effect inhibition of tissue factor and factor VII (Haskel, Torr et al. 1991). This helps in making inactive complex with tissue factor but cannot thwart transient and clot-bound thrombin.

In this invention, however, strategically designed new-generation thrombolytics which contain plasminogen activation as well as thrombin inhibition properties of both kinds (early-stage transient thrombin, as well as the procoagulant generated Protein C pathway) have been designed and validated.

Presently available medication for myocardial infarction/circulatory diseases require co-administration of heparin, hirudin and other thrombin inhibitors but available/marketed thrombin inhibitors target transiently generated thrombin, and do not inhibit the feed-back generation of thrombin.

In contrast to presently available medication, we have strategically designed new class of improved thrombolytics that perform both the thrombin inhibitory functions simultaneously apart from their plasminogen activation property specificity and thereby help to prevent unwanted side effects during clot lysis without not only not compromising their original properties such as fibrin enhancement (as in case of tPA) but also additional properties (such as plasmin- and thrombin dependent activation in cases where none existed in the `parent` molecules). In cases where there is non-specific plasminogen activation in the original molecule (as is the case of streptokinase) we have designed hybrid constructs that exhibit clot specificity apart from the antithrombin properties.

In the present invention, we have disclosed non-natural chimeric versions of thrombolytics like streptokinase, staphylokinase and tissue plasminogen activator which contain both fibrinolytic and anti-thrombin potential. The already known `parent` molecules of these constructs, including the second- and third-generation engineered ones, can dissolve clots but cannot suppress thrombin's activity which is primarily responsible for re-thrombosis. The present constructs not only dissolve the fibrin clots but also directly suppress thrombin and also activate protein C when thrombin shifts the equilibrium through the intrinsic thrombomodulin-catalyzed anticoagulant pathway.

In accordance with the present invention, in one embodiment, EGF 4,5,6 domains were introduced at the different domain junctions within the streptokinase molecule, after placement of suitable linkers, or in place of a natural inter-domain linker. Different active constructs were then selected on the basis of plasminogen activation profile as well as thrombin inhibition properties. Similarly, various muteins of SK fused with the EGF domains in various combinations/motifs were created, expressed and then screened using a simple assay system where functionally surviving chimeras were selected out having the desired properties.

An interesting and useful phenomenon observed in streptokinase (the drug molecule with highest thrombolytic potential) when EGF 4,5,6 was fused at its N-terminal end was that the chimeric construct showed delayed plasminogen activation kinetics and this delayed activation was significantly reduced if small amounts of plasmin were present in the reaction mixture. The serendipitous observation that these chimeric constructs exhibited plasmin-dependent activation (as opposed to `spontaneous` zymogenic activation of plasminogen by unmodified native streptokinase) also makes the resultant molecules clot specific in that these will be circulating initially in an inactive state (since there is usually no free plasmin in blood, as it is rapidly inactivated by the anti-plasmin serpins) but upon encountering the clot-bound plasmin, will be activated due to its plasmin dependent mechanism of action. This would greatly minimize the hemorrhage risk of SK and confer additional advantages on a widely used drug, besides the one conferred by the functional fusion of the EGF domains.

Other interesting constructs in accordance with the present invention were obtained by the fusion of EGF 4,5,6 domains at the inter-domain junction of alpha (.alpha.) and beta (.beta.) domain, on the one hand, and beta (.beta.) and gamma (.gamma.) domains of streptokinase, on the other. Amongst these constructs we found plasminogen activation as well as anti-thrombin activity only where we fused EGF between the alpha and beta domains. Interestingly, the fusion construct where EGF domains were introduced between the beta and gamma domains failed to show any plasmin activity. These results suggest that it is not predictable a priori whether a given domain fusion design will allow the `parent` properties to co-exist unless actually tested by experimentation.

An advantage that was observed in the N-terminal EGF-SK fusion construct, and N-terminal fusion of EGF domains with truncated SK (residues 5-383) constructs was their clear plasmin dependent activation property apart from thrombin inactivation, which is potentially of great advantage for clot specific thrombolysis and thrombin inactivation.

When EGF 4,5,6 domains were fused with N-terminal and C-terminal regions of staphylokinase, it was observed that the N-terminal part was removed during the 1:1 plasmin complex formation, which is likely to be helpful in the independent function of EGF domain during the lysis as also in generating a high level of clot specificity. In the case of C-terminal EGF fusion, it was found to remain attached to SAK. In both cases, thus, plasminogen activation and anti-thrombotic properties were found to be integrated successfully in the chimeric polypeptides.

Compositions including compounds of the invention can have prodrug forms. Prodrugs of the compounds of the invention are useful in the methods of this invention. Any compound that will be converted in vivo to provide a biologically, pharmaceutically or therapeutically active form of a compound of the invention is a prodrug. Various examples and forms of prodrugs are well known in the art. A biomolecule such as a precursor protein or precursor nucleic acid can be a prodrug.

Examples of prodrugs are found, inter alia, in Design of Prodrugs, edited by H. Bundgaard, (Elsevier, 1985), Methods in Enzymology, Vol. 42, at pp. 309-396, edited by K. Widder, et. al. (Academic Press, 1985); A Textbook of Drug Design and Development, edited by Krosgaard-Larsen and H. Bundgaard, Chapter 5, "Design and Application of Prodrugs," by H. Bundgaard, at pp. 113-191, 1991); H. Bundgaard, Advanced Drug Delivery Reviews, Vol. 8, p. 1-38 (1992); H. Bundgaard, et al., Journal of Pharmaceutical Sciences, Vol. 77, p. 285 (1988); and Nogrady (1985) Medicinal Chemistry A Biochemical Approach, Oxford University Press, New York, pages 388-392).

The invention has been described with reference to various specific and preferred embodiments and techniques. However, it should be understood that many variations and modifications may be made while remaining within the spirit and scope of the invention. It will be apparent to one of ordinary skill in the art that compositions, methods, devices, device elements, materials, procedures and techniques other than those specifically described herein can be applied to the practice of the invention as broadly disclosed herein without resort to undue experimentation. All art-known functional equivalents of compositions, methods, devices, device elements, materials, procedures and techniques described herein are intended to be encompassed by this invention. Whenever a range is disclosed, all subranges and individual values are intended to be encompassed. This invention is not to be limited by the embodiments disclosed, including any shown in the drawings or exemplified in the specification, which are given by way of example or illustration and not of limitation. The scope of the invention shall be limited only by the claims.

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SEQUENCE LISTINGS

1

13711245DNAArtificial SequenceStreptococcus equisimilis 1attgctggac ctgagtggct gctagaccgt ccatctgtca acaacagcca attagttgtt 60agcgttgctg gtactgttga ggggacgaat caagacatta gtcttaaatt ttttgaaatc 120gatctaacat cacgacctgc tcatggagga aagacagagc aaggcttaag tccaaaatca 180aaaccatttg ctactgatag tggcgcgatg tcacataaac ttgagaaagc tgacttacta 240aaggctattc aagaacaatt gatcgctaac gtccacagta acgacgacta ctttgaggtc 300attgattttg caagcgatgc aaccattact gatcgaaacg gcaaggtcta ctttgctgac 360aaagatggtt cggtaacctt gccgacccaa cctgtccaag aatttttgct aagcggacat 420gtgcgcgtta gaccatataa agaaaaacca atacaaaacc aagcgaaatc tgttgatgtg 480gaatatactg tacagtttac tcccttaaac cctgatgacg atttcagacc aggtctcaaa 540gatactaagc tattgaaaac actagctatc ggtgacacca tcacatctca agaattacta 600gctcaagcac aaagcatttt aaacaaaaac cacccaggct atacgattta tgaacgtgac 660tcctcaatcg tcactcatga caatgacatt ttccgtacga ttttaccaat ggatcaagag 720tttacttacc gtgttaaaaa tcgggaacaa gcttatagga tcaataaaaa atctggtctg 780aatgaagaaa taaacaacac tgacctgatc tctgagaaat attacgtcct taaaaaaggg 840gaaaagccgt atgatccctt tgatcgcagt cacttgaaac tgttcaccat caaatacgtt 900gatgtcgata ccaacgaatt gctaaaaagt gagcagctct taacagctag cgaacgtaac 960ttagacttca gagatttata cgatcctcgt gataaggcta aactactcta caacaatctc 1020gatgcttttg gtattatgga ctatacctta actggaaaag tagaggataa tcacgatgac 1080accaaccgta tcataaccgt ttatatgggc aagcgacccg aaggagagaa tgctagctat 1140catttagcct atgataaaga tcgttatacc gaagaagaac gagaagttta cagctacctg 1200cgttatacag ggacacctat acctgataac cctaacgaca aataa 12452354DNAArtificial SequenceHomo sapiens 2gtggacccgt gcttcagagc caactgcgag taccagtgcc agcccctgaa ccaaactagc 60tacctctgcg tctgcgccga gggcttcgcg cccattcccc acgagccgca caggtgccag 120atgttttgca accagactgc ctgtccagcc gactgcgacc ccaacaccca ggctagctgt 180gagtgccctg aaggctacat cctggacgac ggtttcatct gcacggacat cgacgagtgc 240gaaaacggcg gcttctgctc cggggtgtgc cacaacctcc ccggtacctt cgagtgcatc 300tgcgggcccg actcggccct tgcccgccac attggcaccg actgtgactc cggc 35431605DNAArtificial SequenceInterdoamin SK_EGF between alpha and Beta 3attgctggac ctgagtggct gctagaccgt ccatctgtca acaacagcca attagttgtt 60agcgttgctg gtactgttga ggggacgaat caagacatta gtcttaaatt ttttgaaatc 120gatctaacat cacgacctgc tcatggagga aagacagagc aaggcttaag tccaaaatca 180aaaccatttg ctactgatag tggcgcgatg tcacataaac ttgagaaagc tgacttacta 240aaggctattc aagaacaatt gatcgctaac gtccacagta acgacgacta ctttgaggtc 300attgattttg caagcgatgc aaccattact gatcgaaacg gcaaggtcta ctttgctgac 360aaagatggtt cggtaacctt gccgacccaa cctgtccaag aatttttgct aagcggacat 420gtgcgcgtta gaccatataa agaaaaacca atacaaaacc aagcgaaatc tgagcccgtg 480gacccgtgct tcagagccaa ctgcgagtac cagtgccagc ccctgaacca aactagctac 540ctctgcgtct gcgccgaggg cttcgcgccc attccccacg agccgcacag gtgccagatg 600ttttgcaacc agactgcctg tccagccgac tgcgacccca acacccaggc tagctgtgag 660tgccctgaag gctacatcct ggacgacggt ttcatctgca cggacatcga cgagtgcgaa 720aacggcggct tctgctccgg ggtgtgccac aacctccccg gtaccttcga gtgcatctgc 780gggcccgact cggcccttgc ccgccacatt ggcactgact gtgactccgg cgttgatgtg 840gaatatactg tacagtttac tcccttaaac cctgatgacg atttcagacc aggtctcaaa 900gatactaagc tattgaaaac actagctatc ggtgacacca tcacatctca agaattacta 960gctcaagcac aaagcatttt aaacaaaaac cacccaggct atacgattta tgaacgtgac 1020tcctcaatcg tcactcatga caatgacatt ttccgtacga ttttaccaat ggatcaagag 1080tttacttacc gtgttaaaaa tcgggaacaa gcttatagga tcaataaaaa atctggtctg 1140aatgaagaaa taaacaacac tgacctgatc tctgagaaat attacgtcct taaaaaaggg 1200gaaaagccgt atgatccctt tgatcgcagt cacttgaaac tgttcaccat caaatacgtt 1260gatgtcgata ccaacgaatt gctaaaaagt gagcagctct taacagctag cgaacgtaac 1320ttagacttca gagatttata cgatcctcgt gataaggcta aactactcta caacaatctc 1380gatgcttttg gtattatgga ctatacctta actggaaaag tagaggataa tcacgatgac 1440accaaccgta tcataaccgt ttatatgggc aagcgacccg aaggagagaa tgctagctat 1500catttagcct atgataaaga tcgttatacc gaagaagaac gagaagttta cagctacctg 1560cgttatacag ggacacctat acctgataac cctaacgaca aataa 160541599DNAArtificial SequenceN_EGF_SK, fusion at the N-terminal of SK 4gtggacccgt gcttcagagc caactgcgag taccagtgcc agcccctgaa ccaaactagc 60tacctctgcg tctgcgccga gggcttcgcg cccattcccc acgagccgca caggtgccag 120atgttttgca accagactgc ctgtccagcc gactgcgacc ccaacaccca ggctagctgt 180gagtgccctg aaggctacat cctggacgac ggtttcatct gcacggacat cgacgagtgc 240gaaaacggcg gcttctgctc cggggtgtgc cacaacctcc ccggtacctt cgagtgcatc 300tgcgggcccg actcggccct tgcccgccac attggcaccg actgtgactc cggcattgct 360ggacctgagt ggctgctaga ccgtccatct gtcaacaaca gccaattagt tgttagcgtt 420gctggtactg ttgaggggac gaatcaagac attagtctta aattttttga aatcgatcta 480acatcacgac ctgctcatgg aggaaagaca gagcaaggct taagtccaaa atcaaaacca 540tttgctactg atagtggcgc gatgtcacat aaacttgaga aagctgactt actaaaggct 600attcaagaac aattgatcgc taacgtccac agtaacgacg actactttga ggtcattgat 660tttgcaagcg atgcaaccat tactgatcga aacggcaagg tctactttgc tgacaaagat 720ggttcggtaa ccttgccgac ccaacctgtc caagaatttt tgctaagcgg acatgtgcgc 780gttagaccat ataaagaaaa accaatacaa aaccaagcga aatctgttga tgtggaatat 840actgtacagt ttactccctt aaaccctgat gacgatttca gaccaggtct caaagatact 900aagctattga aaacactagc tatcggtgac accatcacat ctcaagaatt actagctcaa 960gcacaaagca ttttaaacaa aaaccaccca ggctatacga tttatgaacg tgactcctca 1020atcgtcactc atgacaatga cattttccgt acgattttac caatggatca agagtttact 1080taccgtgtta aaaatcggga acaagcttat aggatcaata aaaaatctgg tctgaatgaa 1140gaaataaaca acactgacct gatctctgag aaatattacg tccttaaaaa aggggaaaag 1200ccgtatgatc cctttgatcg cagtcacttg aaactgttca ccatcaaata cgttgatgtc 1260gataccaacg aattgctaaa aagtgagcag ctcttaacag ctagcgaacg taacttagac 1320ttcagagatt tatacgatcc tcgtgataag gctaaactac tctacaacaa tctcgatgct 1380tttggtatta tggactatac cttaactgga aaagtagagg ataatcacga tgacaccaac 1440cgtatcataa ccgtttatat gggcaagcga cccgaaggag agaatgctag ctatcattta 1500gcctatgata aagatcgtta taccgaagaa gaacgagaag tttacagcta cctgcgttat 1560acagggacac ctatacctga taaccctaac gacaaataa 159951245DNAArtificial SequenceINTERDOMAIN BETA AND GAMMA 5attgctggac ctgagtggct gctagaccgt ccatctgtca acaacagcca attagttgtt 60agcgttgctg gtactgttga ggggacgaat caagacatta gtcttaaatt ttttgaaatc 120gatctaacat cacgacctgc tcatggagga aagacagagc aaggcttaag tccaaaatca 180aaaccatttg ctactgatag tggcgcgatg tcacataaac ttgagaaagc tgacttacta 240aaggctattc aagaacaatt gatcgctaac gtccacagta acgacgacta ctttgaggtc 300attgattttg caagcgatgc aaccattact gatcgaaacg gcaaggtcta ctttgctgac 360aaagatggtt cggtaacctt gccgacccaa cctgtccaag aatttttgct aagcggacat 420gtgcgcgtta gaccatataa agaaaaacca atacaaaacc aagcgaaatc tgttgatgtg 480gaatatactg tacagtttac tcccttaaac cctgatgacg atttcagacc aggtctcaaa 540gatactaagc tattgaaaac actagctatc ggtgacacca tcacatctca agaattacta 600gctcaagcac aaagcatttt aaacaaaaac cacccaggct atacgattta tgaacgtgac 660tcctcaatcg tcactcatga caatgacatt ttccgtacga ttttaccaat ggatcaagag 720tttacttacc gtgttaaaaa tcgggaacaa gcttatagga tcaataaaaa atctggtctg 780aatgaagaaa taaacaacac tgacctgatc tctgagaaat attacgtcct taaaaaaggg 840gaaaagccgt atgatccctt tgatcgcagt cacttgaaac tgttcaccat caaatacgtt 900gatgtcgata ccaacgaatt gctaaaaagt gagcagctct taacagctag cgaacgtaac 960ttagacttca gagatttata cgatcctcgt gataaggcta aactactcta caacaatctc 1020gatgcttttg gtattatgga ctatacctta actggaaaag tagaggataa tcacgatgac 1080accaaccgta tcataaccgt ttatatgggc aagcgacccg aaggagagaa tgctagctat 1140catttagcct atgataaaga tcgttatacc gaagaagaac gagaagttta cagctacctg 1200cgttatacag ggacacctat acctgataac cctaacgaca aataa 124561530DNAArtificial SequenceSK_EGF, Fusion at the C-terminal of SK 6attgctggac ctgagtggct gctagaccgt ccatctgtca acaacagcca attagttgtt 60agcgttgctg gtactgttga ggggacgaat caagacatta gtcttaaatt ttttgaaatc 120gatctaacat cacgacctgc tcatggagga aagacagagc aaggcttaag tccaaaatca 180aaaccatttg ctactgatag tggcgcgatg tcacataaac ttgagaaagc tgacttacta 240aaggctattc aagaacaatt gatcgctaac gtccacagta acgacgacta ctttgaggtc 300attgattttg caagcgatgc aaccattact gatcgaaacg gcaaggtcta ctttgctgac 360aaagatggtt cggtaacctt gccgacccaa cctgtccaag aatttttgct aagcggacat 420gtgcgcgtta gaccatataa agaaaaacca atacaaaacc aagcgaaatc tgttgatgtg 480gaatatactg tacagtttac tcccttaaac cctgatgacg atttcagacc aggtctcaaa 540gatactaagc tattgaaaac actagctatc ggtgacacca tcacatctca agaattacta 600gctcaagcac aaagcatttt aaacaaaaac cacccaggct atacgattta tgaacgtgac 660tcctcaatcg tcactcatga caatgacatt ttccgtacga ttttaccaat ggatcaagag 720tttacttacc gtgttaaaaa tcgggaacaa gcttatagga tcaataaaaa atctggtctg 780aatgaagaaa taaacaacac tgacctgatc tctgagaaat attacgtcct taaaaaaggg 840gaaaagccgt atgatccctt tgatcgcagt cacttgaaac tgttcaccat caaatacgtt 900gatgtcgata ccaacgaatt gctaaaaagt gagcagctct taacagctag cgaacgtaac 960ttagacttca gagatttata cgatcctcgt gataaggcta aactactcta caacaatctc 1020gatgcttttg gtattatgga ctatacctta actggaaaag tagaggataa tcacgatgac 1080accaaccgta tcataaccgt ttatatgggc aagcgacccg aaggagagaa tgctagctat 1140catttagccg gtggcggaca agctcaacaa attgtggtgg acccgtgctt cagagccaac 1200tgcgagtacc agtgccagcc cctgaaccaa actagctacc tctgcgtctg cgccgagggc 1260ttcgcgccca ttccccacga gccgcacagg tgccagatgt tttgcaacca gactgcctgt 1320ccagccgact gcgaccccaa cacccaggct agctgtgagt gccctgaagg ctacatcctg 1380gacgacggtt tcatctgcac ggacatcgac gagtgcgaaa acggcggctt ctgctccggg 1440gtgtgccaca acctccccgg taccttcgag tgcatctgcg ggcccgactc ggcccttgcc 1500cgccacattg gcaccgactg tgactccggc 153071884DNAArtificial SequenceN_EGF_SK_EGF, fusion at the N and C-terminal of SK 7gtggacccgt gcttcagagc caactgcgag taccagtgcc agcccctgaa ccaaactagc 60tacctctgcg tctgcgccga gggcttcgcg cccattcccc acgagccgca caggtgccag 120atgttttgca accagactgc ctgtccagcc gactgcgacc ccaacaccca ggctagctgt 180gagtgccctg aaggctacat cctggacgac ggtttcatct gcacggacat cgacgagtgc 240gaaaacggcg gcttctgctc cggggtgtgc cacaacctcc ccggtacctt cgagtgcatc 300tgcgggcccg actcggccct tgcccgccac attggcaccg actgtgactc cggcattgct 360ggacctgagt ggctgctaga ccgtccatct gtcaacaaca gccaattagt tgttagcgtt 420gctggtactg ttgaggggac gaatcaagac attagtctta aattttttga aatcgatcta 480acatcacgac ctgctcatgg aggaaagaca gagcaaggct taagtccaaa atcaaaacca 540tttgctactg atagtggcgc gatgtcacat aaacttgaga aagctgactt actaaaggct 600attcaagaac aattgatcgc taacgtccac agtaacgacg actactttga ggtcattgat 660tttgcaagcg atgcaaccat tactgatcga aacggcaagg tctactttgc tgacaaagat 720ggttcggtaa ccttgccgac ccaacctgtc caagaatttt tgctaagcgg acatgtgcgc 780gttagaccat ataaagaaaa accaatacaa aaccaagcga aatctgttga tgtggaatat 840actgtacagt ttactccctt aaaccctgat gacgatttca gaccaggtct caaagatact 900aagctattga aaacactagc tatcggtgac accatcacat ctcaagaatt actagctcaa 960gcacaaagca ttttaaacaa aaaccaccca ggctatacga tttatgaacg tgactcctca 1020atcgtcactc atgacaatga cattttccgt acgattttac caatggatca agagtttact 1080taccgtgtta aaaatcggga acaagcttat aggatcaata aaaaatctgg tctgaatgaa 1140gaaataaaca acactgacct gatctctgag aaatattacg tccttaaaaa aggggaaaag 1200ccgtatgatc cctttgatcg cagtcacttg aaactgttca ccatcaaata cgttgatgtc 1260gataccaacg aattgctaaa aagtgagcag ctcttaacag ctagcgaacg taacttagac 1320ttcagagatt tatacgatcc tcgtgataag gctaaactac tctacaacaa tctcgatgct 1380tttggtatta tggactatac cttaactgga aaagtagagg ataatcacga tgacaccaac 1440cgtatcataa ccgtttatat gggcaagcga cccgaaggag agaatgctag ctatcattta 1500gccggtggcg gacaagctca acaaattgtg gtggacccgt gcttcagagc caactgcgag 1560taccagtgcc agcccctgaa ccaaactagc tacctctgcg tctgcgccga gggcttcgcg 1620cccattcccc acgagccgca caggtgccag atgttttgca accagactgc ctgtccagcc 1680gactgcgacc ccaacaccca ggctagctgt gagtgccctg aaggctacat cctggacgac 1740ggtttcatct gcacggacat cgacgagtgc gaaaacggcg gcttctgctc cggggtgtgc 1800cacaacctcc ccggtacctt cgagtgcatc tgcgggcccg actcggccct tgcccgccac 1860attggcaccg actgtgactc cggc 18848354DNAArtificial SequenceEGF 456 ARTIFICIAL 8gttgaccctt gctttagagc caactgtgaa taccaatgcc agcctttgaa ccagacctca 60tacttgtgtg tttgtgccga gggttttgca ccaattcctc atgaaccaca cagatgtcaa 120atgttctgca accagactgc ctgtccagca gactgcgatc ctaatacaca agcttcttgt 180gagtgccctg aaggatacat cttggatgac ggttttattt gtactgacat cgatgagtgc 240gaaaacggtg gattttgtag tggtgtttgc cataatcttc caggaacctt cgaatgtatt 300tgcggtcctg actctgcctt ggcaagacac atcggaactg actgtgattc cgga 35491617DNAArtificial SequenceARTIFICIALLY SYNTHESIZED TPA 9caagagattc atgctagatt cagaagaggt gctagatcct accaggtcat ttgtagagat 60gaaaagacac aaatgatcta tcaacagcac cagtcatggc ttagacctgt tttgagaagt 120aacagagtcg agtactgttg gtgcaattct ggtagagccc aatgtcatag tgttccagtc 180aaatcatgta gtgaacctag atgctttaac ggtggaactt gtcaacaggc tttgtacttc 240tctgatttcg tttgtcaatg cccagaggga ttcgctggta aatgttgcga aattgacacc 300agagctactt gttacgaaga tcagggaatc tcatatagag gtacatggtc taccgctgag 360tccggagccg aatgtactaa ctggaattct tccgctttgg cccaaaaacc atactctggt 420agaagacctg atgctattag acttggtttg ggaaaccaca attattgcag aaatccagac 480agagattcta agccttggtg ttacgttttt aaggccggaa aatattcaag tgaattctgt 540tccacccctg catgctcaga gggtaacagt gattgttact ttggtaatgg atctgcttat 600agaggaaccc attccttgac tgagtcaggt gccagttgtc ttccatggaa ctcaatgatt 660ttgatcggaa aagtttacac tgcacaaaat cctagtgcac aggctcttgg tttgggaaag 720cataactact gtagaaatcc agacggagat gccaaacctt ggtgtcacgt tcttaagaac 780agaagattga catgggaata ctgtgacgtc ccatcttgtt ccacctgcgg tttgagacaa 840tactcacaac ctcagtttag aattaaaggt ggattgttcg ctgatatcgc ctctcatcca 900tggcaggctg ccatttttgc taagcacaga agatcccctg gagagagatt cctttgtggt 960ggaattttga tctcttcctg ctggattttg tccgcagctc actgttttca agaaagattc 1020ccacctcatc accttacagt tatcttggga agaacctaca gagttgtccc aggtgaagag 1080gaacagaagt ttgaggttga aaaatacatt gtccataagg agttcgatga cgatacttat 1140gacaatgata tcgcactttt gcaattgaag tctgattcaa gtagatgtgc tcaggaatct 1200tccgttgtca gaactgtttg tttgccacct gctgaccttc aattgcctga ttggacagag 1260tgtgaacttt ctggttacgg aaaacacgaa gccttgtctc cattttattc cgagagactt 1320aaggaagcac atgttagatt gtatccttca agtagatgta catcccaaca ccttttgaac 1380agaactgtca cagacaatat gttgtgtgct ggagatacca gatcaggtgg accacaagcc 1440aacttgcatg acgcatgcca gggagatagt ggtggacctc ttgtttgttt gaatgacggt 1500agaatgactc ttgtcggaat tatctcttgg ggtttgggat gtggtcaaaa agatgttcca 1560ggtgtctaca ctaaggttac aaactatttg gactggatca gagataacat gagacca 1617102325DNAArtificial SequenceN_EGF_TPA_EGF, Fusion at the N and C terminal of TPA 10gtcgatccat gttttagagc taattgcgag tatcaatgcc agcctcttaa ccaaacttct 60tatttgtgtg tttgcgcaga gggttttgct cctatcccac acgagcctca tagatgccag 120atgttttgca accagaccgc atgtccagct gactgcgatc ctaatactca agcttcctgt 180gagtgccctg aaggttacat tttggacgat ggattcattt gcaccgatat tgacgaatgt 240gagaacggtg gattttgttc aggagtttgc cacaatttgc caggtacatt cgaatgtatt 300tgtggacctg atagtgctct tgccagacat attggaacag attgtgactc cggtcaagag 360attcatgcta gattcagaag aggtgctaga tcctaccagg tcatttgtag agatgaaaag 420acacaaatga tctatcaaca gcaccagtca tggcttagac ctgttttgag aagtaacaga 480gtcgagtact gttggtgcaa ttctggtaga gcccaatgtc atagtgttcc agtcaaatca 540tgtagtgaac ctagatgctt taacggtgga acttgtcaac aggctttgta cttctctgat 600ttcgtttgtc aatgcccaga gggattcgct ggtaaatgtt gcgaaattga caccagagct 660acttgttacg aagatcaggg aatctcatat agaggtacat ggtctaccgc tgagtccgga 720gccgaatgta ctaactggaa ttcttccgct ttggcccaaa aaccatactc tggtagaaga 780cctgatgcta ttagacttgg tttgggaaac cacaattatt gcagaaatcc agacagagat 840tctaagcctt ggtgttacgt ttttaaggcc ggaaaatatt caagtgaatt ctgttccacc 900cctgcatgct cagagggtaa cagtgattgt tactttggta atggatctgc ttatagagga 960acccattcct tgactgagtc aggtgccagt tgtcttccat ggaactcaat gattttgatc 1020ggaaaagttt acactgcaca aaatcctagt gcacaggctc ttggtttggg aaagcataac 1080tactgtagaa atccagacgg agatgccaaa ccttggtgtc acgttcttaa gaacagaaga 1140ttgacatggg aatactgtga cgtcccatct tgttccacct gcggtttgag acaatactca 1200caacctcagt ttagaattaa aggtggattg ttcgctgata tcgcctctca tccatggcag 1260gctgccattt ttgctaagca cagaagatcc cctggagaga gattcctttg tggtggaatt 1320ttgatctctt cctgctggat tttgtccgca gctcactgtt ttcaagaaag attcccacct 1380catcacctta cagttatctt gggaagaacc tacagagttg tcccaggtga agaggaacag 1440aagtttgagg ttgaaaaata cattgtccat aaggagttcg atgacgatac ttatgacaat 1500gatatcgcac ttttgcaatt gaagtctgat tcaagtagat gtgctcagga atcttccgtt 1560gtcagaactg tttgtttgcc acctgctgac cttcaattgc ctgattggac agagtgtgaa 1620ctttctggtt acggaaaaca cgaagccttg tctccatttt attccgagag acttaaggaa 1680gcacatgtta gattgtatcc ttcaagtaga tgtacatccc aacacctttt gaacagaact 1740gtcacagaca atatgttgtg tgctggagat accagatcag gtggaccaca agccaacttg 1800catgacgcat gccagggaga tagtggtgga cctcttgttt gtttgaatga cggtagaatg 1860actcttgtcg gaattatctc ttggggtttg ggatgtggtc aaaaagatgt tccaggtgtc 1920tacactaagg ttacaaacta tttggactgg atcagagata acatgagacc agtcgatcca 1980tgttttagag ctaattgcga gtatcaatgc cagcctctta accaaacttc ttatttgtgt 2040gtttgcgcag agggttttgc tcctatccca cacgagcctc atagatgcca gatgttttgc 2100aaccagaccg catgtccagc tgactgcgat cctaatactc aagcttcctg tgagtgccct 2160gaaggttaca ttttggacga tggattcatt tgcaccgata ttgacgaatg tgagaacggt 2220ggattttgtt caggagtttg ccacaatttg ccaggtacat tcgaatgtat ttgtggacct 2280gatagtgctc ttgccagaca tattggaaca gattgtgact ccggt 2325111971DNAArtificial SequenceN_EGF_TPA, fusion at the N-teminal of TPA 11gtcgatccat gttttagagc taattgcgag tatcaatgcc agcctcttaa ccaaacttct 60tatttgtgtg tttgcgcaga gggttttgct cctatcccac acgagcctca tagatgccag 120atgttttgca accagaccgc atgtccagct gactgcgatc ctaatactca agcttcctgt 180gagtgccctg aaggttacat tttggacgat ggattcattt gcaccgatat tgacgaatgt 240gagaacggtg gattttgttc aggagtttgc cacaatttgc caggtacatt cgaatgtatt 300tgtggacctg atagtgctct tgccagacat attggaacag attgtgactc cggtcaagag 360attcatgcta gattcagaag aggtgctaga tcctaccagg tcatttgtag agatgaaaag 420acacaaatga tctatcaaca gcaccagtca tggcttagac ctgttttgag aagtaacaga

480gtcgagtact gttggtgcaa ttctggtaga gcccaatgtc atagtgttcc agtcaaatca 540tgtagtgaac ctagatgctt taacggtgga acttgtcaac aggctttgta cttctctgat 600ttcgtttgtc aatgcccaga gggattcgct ggtaaatgtt gcgaaattga caccagagct 660acttgttacg aagatcaggg aatctcatat agaggtacat ggtctaccgc tgagtccgga 720gccgaatgta ctaactggaa ttcttccgct ttggcccaaa aaccatactc tggtagaaga 780cctgatgcta ttagacttgg tttgggaaac cacaattatt gcagaaatcc agacagagat 840tctaagcctt ggtgttacgt ttttaaggcc ggaaaatatt caagtgaatt ctgttccacc 900cctgcatgct cagagggtaa cagtgattgt tactttggta atggatctgc ttatagagga 960acccattcct tgactgagtc aggtgccagt tgtcttccat ggaactcaat gattttgatc 1020ggaaaagttt acactgcaca aaatcctagt gcacaggctc ttggtttggg aaagcataac 1080tactgtagaa atccagacgg agatgccaaa ccttggtgtc acgttcttaa gaacagaaga 1140ttgacatggg aatactgtga cgtcccatct tgttccacct gcggtttgag acaatactca 1200caacctcagt ttagaattaa aggtggattg ttcgctgata tcgcctctca tccatggcag 1260gctgccattt ttgctaagca cagaagatcc cctggagaga gattcctttg tggtggaatt 1320ttgatctctt cctgctggat tttgtccgca gctcactgtt ttcaagaaag attcccacct 1380catcacctta cagttatctt gggaagaacc tacagagttg tcccaggtga agaggaacag 1440aagtttgagg ttgaaaaata cattgtccat aaggagttcg atgacgatac ttatgacaat 1500gatatcgcac ttttgcaatt gaagtctgat tcaagtagat gtgctcagga atcttccgtt 1560gtcagaactg tttgtttgcc acctgctgac cttcaattgc ctgattggac agagtgtgaa 1620ctttctggtt acggaaaaca cgaagccttg tctccatttt attccgagag acttaaggaa 1680gcacatgtta gattgtatcc ttcaagtaga tgtacatccc aacacctttt gaacagaact 1740gtcacagaca atatgttgtg tgctggagat accagatcag gtggaccaca agccaacttg 1800catgacgcat gccagggaga tagtggtgga cctcttgttt gtttgaatga cggtagaatg 1860actcttgtcg gaattatctc ttggggtttg ggatgtggtc aaaaagatgt tccaggtgtc 1920tacactaagg ttacaaacta tttggactgg atcagagata acatgagacc a 1971121971DNAArtificial SequenceTPA_EGF, fusion at the C-terminal of TPA 12caagagattc atgctagatt cagaagaggt gctagatcct accaggtcat ttgtagagat 60gaaaagacac aaatgatcta tcaacagcac cagtcatggc ttagacctgt tttgagaagt 120aacagagtcg agtactgttg gtgcaattct ggtagagccc aatgtcatag tgttccagtc 180aaatcatgta gtgaacctag atgctttaac ggtggaactt gtcaacaggc tttgtacttc 240tctgatttcg tttgtcaatg cccagaggga ttcgctggta aatgttgcga aattgacacc 300agagctactt gttacgaaga tcagggaatc tcatatagag gtacatggtc taccgctgag 360tccggagccg aatgtactaa ctggaattct tccgctttgg cccaaaaacc atactctggt 420agaagacctg atgctattag acttggtttg ggaaaccaca attattgcag aaatccagac 480agagattcta agccttggtg ttacgttttt aaggccggaa aatattcaag tgaattctgt 540tccacccctg catgctcaga gggtaacagt gattgttact ttggtaatgg atctgcttat 600agaggaaccc attccttgac tgagtcaggt gccagttgtc ttccatggaa ctcaatgatt 660ttgatcggaa aagtttacac tgcacaaaat cctagtgcac aggctcttgg tttgggaaag 720cataactact gtagaaatcc agacggagat gccaaacctt ggtgtcacgt tcttaagaac 780agaagattga catgggaata ctgtgacgtc ccatcttgtt ccacctgcgg tttgagacaa 840tactcacaac ctcagtttag aattaaaggt ggattgttcg ctgatatcgc ctctcatcca 900tggcaggctg ccatttttgc taagcacaga agatcccctg gagagagatt cctttgtggt 960ggaattttga tctcttcctg ctggattttg tccgcagctc actgttttca agaaagattc 1020ccacctcatc accttacagt tatcttggga agaacctaca gagttgtccc aggtgaagag 1080gaacagaagt ttgaggttga aaaatacatt gtccataagg agttcgatga cgatacttat 1140gacaatgata tcgcactttt gcaattgaag tctgattcaa gtagatgtgc tcaggaatct 1200tccgttgtca gaactgtttg tttgccacct gctgaccttc aattgcctga ttggacagag 1260tgtgaacttt ctggttacgg aaaacacgaa gccttgtctc cattttattc cgagagactt 1320aaggaagcac atgttagatt gtatccttca agtagatgta catcccaaca ccttttgaac 1380agaactgtca cagacaatat gttgtgtgct ggagatacca gatcaggtgg accacaagcc 1440aacttgcatg acgcatgcca gggagatagt ggtggacctc ttgtttgttt gaatgacggt 1500agaatgactc ttgtcggaat tatctcttgg ggtttgggat gtggtcaaaa agatgttcca 1560ggtgtctaca ctaaggttac aaactatttg gactggatca gagataacat gagaccagtc 1620gatccatgtt ttagagctaa ttgcgagtat caatgccagc ctcttaacca aacttcttat 1680ttgtgtgttt gcgcagaggg ttttgctcct atcccacacg agcctcatag atgccagatg 1740ttttgcaacc agaccgcatg tccagctgac tgcgatccta atactcaagc ttcctgtgag 1800tgccctgaag gttacatttt ggacgatgga ttcatttgca ccgatattga cgaatgtgag 1860aacggtggat tttgttcagg agtttgccac aatttgccag gtacattcga atgtatttgt 1920ggacctgata gtgctcttgc cagacatatt ggaacagatt gtgactccgg t 1971131860DNAArtificial SequenceID EGF TPA DEL EGF 13caagagattc atgctagatt cagaagaggt gctagatcct accaggtcat ttgtagagat 60gaaaagacac aaatgatcta tcaacagcac cagtcatggc ttagacctgt tttgagaagt 120aacagagtcg agtactgttg gtgcaattct ggtagagccc aatgtcatag tgttccagtt 180aaatcagttg acccttgctt tagagccaac tgtgaatacc aatgccagcc tttgaaccag 240acctcatact tgtgtgtttg tgccgagggt tttgcaccaa ttcctcatga accacacaga 300tgtcaaatgt tctgcaacca gactgcctgt ccagcagact gcgatcctaa tacacaagct 360tcttgtgagt gccctgaagg atacatcttg gatgacggtt ttatttgtac tgacatcgat 420gagtgcgaaa acggtggatt ttgtagtggt gtttgccata atcttccagg aaccttcgaa 480tgtatttgcg gtcctgactc tgccttggca agacatatag gtactgactg tgattccgga 540accagagcta cttgttacga agatcaggga atctcatata gaggtacatg gtctaccgct 600gagtccggag ccgaatgtac taactggaat tcttccgctt tggcccaaaa accatactct 660ggtagaagac ctgatgctat tagacttggt ttgggaaacc acaattattg cagaaatcca 720gacagagatt ctaagccttg gtgttacgtt tttaaggccg gaaaatattc aagtgaattc 780tgttccaccc ctgcatgctc agagggtaac agtgattgtt actttggtaa tggatctgct 840tatagaggaa cccattcctt gactgagtca ggtgccagtt gtcttccatg gaactcaatg 900attttgatcg gaaaagttta cactgcacaa aatcctagtg cacaggctct tggtttggga 960aagcataact actgtagaaa tccagacgga gatgccaaac cttggtgtca cgttcttaag 1020aacagaagat tgacatggga atactgtgac gtcccatctt gttccacctg cggtttgaga 1080caatactcac aacctcagtt tagaattaaa ggtggattgt tcgctgatat cgcctctcat 1140ccatggcagg ctgccatttt tgctaagcac agaagatccc ctggagagag attcctttgt 1200ggtggaattt tgatctcttc ctgctggatt ttgtccgcag ctcactgttt tcaagaaaga 1260ttcccacctc atcaccttac agttatcttg ggaagaacct acagagttgt cccaggtgaa 1320gaggaacaga agtttgaggt tgaaaaatac attgtccata aggagttcga tgacgatact 1380tatgacaatg atatcgcact tttgcaattg aagtctgatt caagtagatg tgctcaggaa 1440tcttccgttg tcagaactgt ttgtttgcca cctgctgacc ttcaattgcc tgattggaca 1500gagtgtgaac tttctggtta cggaaaacac gaagccttgt ctccatttta ttccgagaga 1560cttaaggaag cacatgttag attgtatcct tcaagtagat gtacatccca acaccttttg 1620aacagaactg tcacagacaa tatgttgtgt gctggagata ccagatcagg tggaccacaa 1680gccaacttgc atgacgcatg ccagggagat agtggtggac ctcttgtttg tttgaatgac 1740ggtagaatga ctcttgtcgg aattatctct tggggtttgg gatgtggtca aaaagatgtt 1800ccaggtgtct acactaaggt tacaaactat ttggactgga tcagagataa catgagacca 1860141593DNAArtificial SequenceID EGF TPA DEL EGF K1 14caagagattc atgctagatt cagaagaggt gctagatcct accaggtcat ttgtagagat 60gaaaagacac aaatgatcta tcaacagcac cagtcatggc ttagacctgt tttgagaagt 120aacagagtcg agtactgttg gtgcaattct ggtagagccc aatgtcatag tgttccagtt 180aaatcagttg acccttgctt tagagccaac tgtgaatacc aatgccagcc tttgaaccag 240acctcatact tgtgtgtttg tgccgagggt tttgcaccaa ttcctcatga accacacaga 300tgtcaaatgt tctgcaacca gactgcctgt ccagcagact gcgatcctaa tacacaagct 360tcttgtgagt gccctgaagg atacatcttg gatgacggtt ttatttgtac tgacatcgat 420gagtgcgaaa acggtggatt ttgtagtggt gtttgccata atcttccagg aaccttcgaa 480tgtatttgcg gtcctgactc tgccttggca agacatattg gtactgattg tgattccgga 540aacagtgatt gttactttgg taatggatct gcttatagag gaacccattc cttgactgag 600tcaggtgcca gttgtcttcc atggaactca atgattttga tcggaaaagt ttacactgca 660caaaatccta gtgcacaggc tcttggtttg ggaaagcata actactgtag aaatccagac 720ggagatgcca aaccttggtg tcacgttctt aagaacagaa gattgacatg ggaatactgt 780gacgtcccat cttgttccac ctgcggtttg agacaatact cacaacctca gtttagaatt 840aaaggtggat tgttcgctga tatcgcctct catccatggc aggctgccat ttttgctaag 900cacagaagat cccctggaga gagattcctt tgtggtggaa ttttgatctc ttcctgctgg 960attttgtccg cagctcactg ttttcaagaa agattcccac ctcatcacct tacagttatc 1020ttgggaagaa cctacagagt tgtcccaggt gaagaggaac agaagtttga ggttgaaaaa 1080tacattgtcc ataaggagtt cgatgacgat acttatgaca atgatatcgc acttttgcaa 1140ttgaagtctg attcaagtag atgtgctcag gaatcttccg ttgtcagaac tgtttgtttg 1200ccacctgctg accttcaatt gcctgattgg acagagtgtg aactttctgg ttacggaaaa 1260cacgaagcct tgtctccatt ttattccgag agacttaagg aagcacatgt tagattgtat 1320ccttcaagta gatgtacatc ccaacacctt ttgaacagaa ctgtcacaga caatatgttg 1380tgtgctggag ataccagatc aggtggacca caagccaact tgcatgacgc atgccaggga 1440gatagtggtg gacctcttgt ttgtttgaat gacggtagaa tgactcttgt cggaattatc 1500tcttggggtt tgggatgtgg tcaaaaagat gttccaggtg tctacactaa ggttacaaac 1560tatttggact ggatcagaga taacatgaga cca 1593151593DNAArtificial SequenceN_EGF DEL EGF K1 15gttgaccctt gcttcagagc caactgtgaa taccaatgcc agcctttgaa ccagacctca 60tacttgtgtg tttgtgccga gggttttgca ccaattcctc atgaaccaca cagatgtcaa 120atgttctgca accagactgc ctgtccagca gactgcgatc ctaatacaca agcttcttgt 180gagtgccctg aaggatacat cttggatgac ggttttattt gtactgacat cgatgagtgc 240gaaaacggtg gattttgtag tggtgtttgc cataatcttc caggaacctt cgaatgtatt 300tgcggtcctg actctgcctt ggcaagacac atcggaactg actgtgattc cggacaagag 360attcatgcta gattcagaag aggtgctaga tcctaccagg tcatttgtag agatgaaaag 420acacaaatga tctatcaaca gcaccagtca tggcttagac ctgttttgag aagtaacaga 480gtcgagtact gttggtgcaa ttctggtaga gcccaatgtc atagtgttcc agtcaagtca 540aatagtgatt gttactttgg taatggatct gcttatagag gaacccattc cttgactgag 600tcaggtgcca gttgtcttcc atggaactca atgattttga tcggaaaagt ttacactgca 660caaaatccta gtgcacaggc tcttggtttg ggaaagcata actactgtag aaatccagac 720ggagatgcca aaccttggtg tcacgttctt aagaacagaa gattgacatg ggaatactgt 780gacgtcccat cttgttccac ctgcggtttg agacaatact cacaacctca gtttagaatt 840aaaggtggat tgttcgctga tatcgcctct catccatggc aggctgccat ttttgctaag 900cacagaagat cccctggaga gagattcctt tgtggtggaa ttttgatctc ttcctgctgg 960attttgtccg cagctcactg ttttcaagaa agattcccac ctcatcacct tacagttatc 1020ttgggaagaa cctacagagt tgtcccaggt gaagaggaac agaagtttga ggttgaaaaa 1080tacattgtcc ataaggagtt cgatgacgat acttatgaca atgatatcgc acttttgcaa 1140ttgaagtctg attcaagtag atgtgctcag gaatcttccg ttgtcagaac tgtttgtttg 1200ccacctgctg accttcaatt gcctgattgg acagagtgtg aactttctgg ttacggaaaa 1260cacgaagcct tgtctccatt ttattccgag agacttaagg aagcacatgt tagattgtat 1320ccttcaagta gatgtacatc ccaacacctt ttgaacagaa ctgtcacaga caatatgttg 1380tgtgctggag ataccagatc aggtggacca caagccaact tgcatgacgc atgccaggga 1440gatagtggtg gacctcttgt ttgtttgaat gacggtagaa tgactcttgt cggaattatc 1500tcttggggtt tgggatgtgg tcaaaaagat gttccaggtg tctacactaa ggttacaaac 1560tatttggact ggatcagaga taacatgaga cca 1593161593DNAArtificial SequenceTPA _EGF DEL EGF AND K1 16caagagattc atgctagatt cagaagaggt gctagatcct accaggtcat ttgtagagat 60gaaaagacac aaatgatcta tcaacagcac cagtcatggc ttagacctgt tttgagaagt 120aacagagtcg agtactgttg gtgcaattct ggtagagccc aatgtcatag tgttccagtc 180aagtcaaata gtgattgtta ctttggtaat ggatctgctt atagaggaac ccattccttg 240actgagtcag gtgccagttg tcttccatgg aactcaatga ttttgatcgg aaaagtttac 300actgcacaaa atcctagtgc acaggctctt ggtttgggaa agcataacta ctgtagaaat 360ccagacggag atgccaaacc ttggtgtcac gttcttaaga acagaagatt gacatgggaa 420tactgtgacg tcccatcttg ttccacctgc ggtttgagac aatactcaca acctcagttt 480agaattaaag gtggattgtt cgctgatatc gcctctcatc catggcaggc tgccattttt 540gctaagcaca gaagatcccc tggagagaga ttcctttgtg gtggaatttt gatctcttcc 600tgctggattt tgtccgcagc tcactgtttt caagaaagat tcccacctca tcaccttaca 660gttatcttgg gaagaaccta cagagttgtc ccaggtgaag aggaacagaa gtttgaggtt 720gaaaaataca ttgtccataa ggagttcgat gacgatactt atgacaatga tatcgcactt 780ttgcaattga agtctgattc aagtagatgt gctcaggaat cttccgttgt cagaactgtt 840tgtttgccac ctgctgacct tcaattgcct gattggacag agtgtgaact ttctggttac 900ggaaaacacg aagccttgtc tccattttat tccgagagac ttaaggaagc acatgttaga 960ttgtatcctt caagtagatg tacatcccaa caccttttga acagaactgt cacagacaat 1020atgttgtgtg ctggagatac cagatcaggt ggaccacaag ccaacttgca tgacgcatgc 1080cagggagata gtggtggacc tcttgtttgt ttgaatgacg gtagaatgac tcttgtcgga 1140attatctctt ggggtttggg atgtggtcaa aaagatgttc caggtgtcta cactaaggtt 1200acaaactatt tggactggat cagagataac atgagaccag tcgatccatg ttttagagct 1260aattgcgagt atcaatgcca gcctcttaac caaacttctt atttgtgtgt ttgcgcagag 1320ggttttgctc ctatcccaca cgagcctcat agatgccaga tgttttgcaa ccagaccgca 1380tgtccagctg actgcgatcc taatactcaa gcttcctgtg agtgccctga aggttacatt 1440ttggacgatg gattcatttg caccgatatt gacgaatgtg agaacggtgg attttgttca 1500ggagtttgcc acaatttgcc aggtacattc gaatgtattt gtggacctga tagtgctctt 1560gccagacata ttggaacaga ttgtgactca ggt 159317414DNAArtificial SequenceSAK 17atgtcaagtt cattcgacaa aggaaaatat aaaaaaggcg atgacgcgag ttattttgaa 60ccaacaggcc cgtatttgat ggtaaatgtg actggagttg atagtaaagg aaatgaattg 120ctatcccctc attatgtcga gtttcctatt aaacctggga ctacacttac aaaagaaaaa 180attgaatact atgtcgaatg ggcattagat gcgacagcat ataaagagtt tagagtagtt 240gaattagatc caagcgcaaa gatcgaagtc acttattatg ataagaataa gaaaaaagaa 300gaaacgaagt ctttccctat aacagaaaaa ggttttgttg tcccagattt atcagagcat 360attaaaaacc ctggattcaa cttaattaca aaggttgtta tagaaaagaa ataa 41418762DNAArtificial SequenceN_EGF_SAK, fusion at the N-terminal of SAK 18gtggacccgt gcttcagagc caactgcgag taccagtgcc agcccctgaa ccaaactagc 60tacctctgcg tctgcgccga gggcttcgcg cccattcccc acgagccgca caggtgccag 120atgttttgca accagactgc ctgtccagcc gactgcgacc ccaacaccca ggctagctgt 180gagtgccctg aaggctacat cctggacgac ggtttcatct gcacggacat cgacgagtgc 240gaaaacggcg gcttctgctc cggggtgtgc cacaacctcc ccggtacctt cgagtgcatc 300tgcgggcccg actcggccct tgcccgccac attggcaccg actgtgactc cggctcaagt 360tcattcgaca aaggaaaata taaaaaaggc gatgacgcga gttattttga accaacaggc 420ccgtatttga tggtaaatgt gactggagtt gatagtaaag gaaatgaatt gctatcccct 480cattatgtcg agtttcctat taaacctggg actacactta caaaagaaaa aattgaatac 540tatgtcgaat gggcattaga tgcgacagca tataaagagt ttagagtagt tgaattagat 600ccaagcgcaa agatcgaagt cacttattat gataagaata agaaaaaaga agaaacgaag 660tctttcccta taacagaaaa aggttttgtt gtcccagatt tatcagagca tattaaaaac 720cctggattca acttaattac aaaggttgtt atagaaaaga aa 76219768DNAArtificial SequenceSAK_EGF, fusion at the C-terminal of SAK 19tcaagttcat tcgacaaagg aaaatataaa aaaggcgatg acgcgagtta ttttgaacca 60acaggcccgt atttgatggt aaatgtgact ggagttgata gtaaaggaaa tgaattgcta 120tcccctcatt atgtcgagtt tcctattaaa cctgggacta cacttacaaa agaaaaaatt 180gaatactatg tcgaatgggc attagatgcg acagcatata aagagtttag agtagttgaa 240ttagatccaa gcgcaaagat cgaagtcact tattatgata agaataagaa aaaagaagaa 300acgaagtctt tccctataac agaaaaaggt tttgttgtcc cagatttatc agagcatatt 360aaaaaccctg gattcaactt aattacaaag gttgttatag aaaagaaaga gcccgtggac 420ccgtgcttca gagccaactg cgagtaccag tgccagcccc tgaaccaaac tagctacctc 480tgcgtctgcg ccgagggctt cgcgcccatt ccccacgagc cgcacaggtg ccagatgttt 540tgcaaccaga ctgcctgtcc agccgactgc gaccccaaca cccaggctag ctgtgagtgc 600cctgaaggct acatcctgga cgacggtttc atctgcacgg acatcgacga gtgcgaaaac 660ggcggcttct gctccggggt gtgccacaac ctccccggta ccttcgagtg catctgcggg 720cccgactcgg cccttgcccg ccacattggc accgactgtg actccggc 768201617DNAArtificial SequenceVariant of tPA (tenecteplase) 20caagagattc atgctagatt cagaagaggt gctagatcct accaggtcat ttgtagagat 60gaaaagacac aaatgatcta tcaacagcac cagtcatggc ttagacctgt tttgagaagt 120aacagagtcg agtactgttg gtgcaattct ggtagagccc aatgtcatag tgttccagtc 180aaatcatgta gtgaacctag atgctttaac ggtggaactt gtcaacaggc tttgtacttc 240tctgatttcg tttgtcaatg cccagaggga ttcgctggta aatgttgcga aattgacacc 300agagctactt gttacgaaga tcagggaatc tcatatagag gtaattggtc tacagctgag 360tccggagccg aatgtactca atggaattct tccgctttgg cccaaaaacc atactctggt 420agaagacctg atgctattag acttggtttg ggaaaccaca attattgcag aaatccagac 480agagattcta agccttggtg ttacgttttt aaggccggaa aatattcaag tgaattctgt 540tccacccctg catgctcaga gggtaacagt gattgttact ttggtaatgg atctgcttat 600agaggaaccc attccttgac tgagtcaggt gccagttgtc ttccatggaa ctcaatgatt 660ttgatcggaa aagtttacac tgcacaaaat cctagtgcac aggctcttgg tttgggaaag 720cataactact gtagaaatcc agacggagat gccaaacctt ggtgtcacgt tcttaagaac 780agaagattga catgggaata ctgtgacgtc ccatcttgtt ccacctgcgg tttgagacaa 840tactcacaac ctcagtttag aattaaaggt ggattgttcg ctgatatcgc ctctcatcca 900tggcaggctg ccatttttgc tgctgccgct gcttcccctg gagagagatt cctttgtggt 960ggaattttga tctcttcctg ctggattttg tccgcagctc actgttttca agaaagattc 1020ccacctcatc accttacagt tatcttggga agaacctaca gagttgtccc aggtgaagag 1080gaacagaagt ttgaggttga aaaatacatt gtccataagg agttcgatga cgatacttat 1140gacaatgata tcgcactttt gcaattgaag tctgattcaa gtagatgtgc tcaggaatct 1200tccgttgtca gaactgtttg tttgccacct gctgaccttc aattgcctga ttggacagag 1260tgtgaacttt ctggttacgg aaaacacgaa gccttgtctc cattttattc cgagagactt 1320aaggaagcac atgttagatt gtatccttca agtagatgta catcccaaca ccttttgaac 1380agaactgtca cagacaatat gttgtgtgct ggagatacca gatcaggtgg accacaagcc 1440aacttgcatg acgcatgcca gggagatagt ggtggacctc ttgtttgttt gaatgacggt 1500agaatgactc ttgtcggaat tatctcttgg ggtttgggat gtggtcaaaa agatgttcca 1560ggtgtctaca ctaaggttac aaactatttg gactggatca gagataacat gagacca 16172140DNAArtificial Sequenceprimer_bind N_EGF_SK Fp 1 21gaatatctcg agaaaagagt ggacccgtgc ttcagagcca 402248DNAArtificial Sequenceprimer_bind N_EGF_SK Rp 2 22gtctagcagc cactcaggtc cagcaatgcc ggagtcacag tcggtgcc 482348DNAArtificial Sequenceprimer_bind N_EGF_SK Fp3 23ggcaccgact gtgactccgg cattgctgga cctgagtggc tgctagac 482442DNAArtificial Sequenceprimer_bind N_EGF_SK Rp 4 24cctatacgcg gccgcttatt tgtcgttagg gttatcaggt at 422542DNAArtificial Sequenceprimer_bind SK_EGF Fp 1 25gcatatctcg agaaaagaat tgctggacct gagtggctgc ta 422660DNAArtificial Sequenceprimer_bind SK_EGF Rp 2 26gaagcacggg tccaccacaa tttgttgagc ttgtccgcca ccggctaaat gatagctagc 602760DNAArtificial Sequenceprimer_bind SK_EGF Fp 3 27gctagctatc

atttagccgg tggcggacaa gctcaacaaa ttgtggtgga cccgtgcttc 602839DNAArtificial Sequenceprimer_bind SK_EGF Rp 4 28ccatatcgcg gccgcgccgg agtcacagtc ggtgccaat 392942DNAArtificial Sequenceprimer_bind ID a Fp 1 29ggatatctcg agaaaagaat tgctggacct gagtggctgc ta 423042DNAArtificial Sequenceprimer_bind ID a Rp 2 30aagcacgggt ccacgggctc agatttcgct tggttttgta tt 423142DNAArtificial Sequenceprimer_bind ID EGF Fp 3 31aatacaaaac caagcgaaat ctgagcccgt ggacccgtgc tt 423244DNAArtificial Sequenceprimer_bind ID EGF Rp 4 32tacagtatat tccacatcaa cgccggagtc acagtcagtg ccaa 443344DNAArtificial Sequenceprimer_bind ID C Fp 5 33attggcactg actgtgactc cggcgttgat gtggaatata ctgt 443440DNAArtificial Sequenceprimer_bind ID N3Rp 6 34aaatatcgcg gccgctttgt cgttagggtt atcaggtata 403531DNAArtificial Sequenceprimer_bind M repV Fp 35cacaggtgtc aggtgttttg caatcagact g 313631DNAArtificial Sequenceprimer_bind M rep V Rp 36cagtctgatt gcaaaacacc tgacacctgt g 313742DNAArtificial Sequenceprimer_bind M rep A Fp 37ccgcacaggt gccaggcttt ttgcaaccag actgcttgtc ca 423842DNAArtificial Sequenceprimer_bind M rep A Rp 38tggacaagca gtctggttgc aaaaagcctg gcacctgtgc gg 423936DNAArtificial Sequenceprimer_bind M rep Q Fp 39cacaggtgtc agcaattttg caaccagaca gcctgt 364036DNAArtificial Sequenceprimer_bind M rep Q Rp 40acaggctgtc tggttgcaaa attgctgaca cctgtg 364142DNAArtificial Sequenceprimer_bind N4SK_EGF Fp 1 41gcataactcg agaaaagaga ggcttggctg ctagaccgtc ca 424239DNAArtificial Sequenceprimer_bind N4SK_EGF Rp 2 42ccatatcgcg gccgcgccgg agtcacagtc ggtgccaat 394342DNAArtificial Sequenceprimer_bind N_EGF_TCS Fp 1 43gcctaactcg agaaaagaga gcccgtggac ccgtgcttca ga 424442DNAArtificial Sequenceprimer_bind N_EGF_TCS_Rp2 44gacaattcta ggtttaatgc cagagtcaca gtcggtgcca at 424541DNAArtificial Sequenceprimer_bind TCS_SK Fp 3 45ggcattaaac ctagaattgt cggacctgag tggctgctag a 414642DNAArtificial Sequenceprimer_bind SK Rp 4 46cctatacgcg gccgcttatt tgtcgttagg gttatcaggt at 424742DNAArtificial Sequenceprimer_bind ID N1C Fp1 47ggatatctcg agaaaagaat tgctggacct gagtggctgc ta 424843DNAArtificial Sequenceprimer_bind ID N1C Rp 48ctctgaagca cgggtccacg ggctccaagt gactgcgatc aaa 434943DNAArtificial Sequenceprimer_bind IDE4Fp3 49tttgatcgca gtcacttgga gcccgtggac ccgtgcttca gag 435040DNAArtificial Sequenceprimer_bind IDE6Rp4 50aacgtatttg atggtgaaca gtttgccgga gtcacagtcg 405140DNAArtificial Sequenceprimer_bind IDN3Fp5 51cgactgtgac tccggcaaac tgttcaccat caaatacgtt 405240DNAArtificial Sequenceprimer_bind ID N3Rp6 52aaatatcgcg gccgctttgt cgttagggtt atcaggtata 405363DNAArtificial Sequenceprimer_bind TG_ N_EGF_ Fp 1 53ggtatcctcg agaaaagagt tcaagcgcaa cagatcgtgg aacccgtgga cccgtgcttc 60aga 635434DNAArtificial Sequenceprimer_bind Afl-II Rp2 54ggttttgatt ttggacttaa gccttgctct gtct 345536DNAArtificial Sequenceprimer_bind N_EGF_SAK Fp 1 55atggatctcg agaaaagagt ggacccgtgc ttcaga 365644DNAArtificial Sequenceprimer_bind N_EGF_SAK Rp 2 56atattttctt tgtcgaatga acttgacatg ccggagtcac agtc 445745DNAArtificial Sequenceprimer_bind N_EGF_SAK Fp3 57gactgtgact ccggcatgtc aagttcattc gacaaaggaa aatat 455840DNAArtificial Sequenceprimer_bind N_EGF_SAK Rp 4 58ttatatcgcg gccgcttatt tcttttctat aacaaccttt 405940DNAArtificial Sequenceprimer_bind SAK_EGF Fp 1 59atccctctcg agaaaagatc aagttcattc gacaaaggaa 406052DNAArtificial Sequenceprimer_bind SAK_EGF Rp 2 60agttggctct gaagcacggg tccacgggct ctttcttttc tataacaacc tt 526152DNAArtificial Sequenceprimer_bind SAK_EGF Fp 3 61aaggttgtta tagaaaagaa agagcccgtg gacccgtgct tcagagccaa ct 526240DNAArtificial Sequenceprimer_bind SAK_EGF Rp 4 62ttttacgcgg ccgctcctga gtcacagtct gtgccaatgt 406338DNAArtificial Sequenceprimer_bind BacFp 1 63atataggcca tgggtggacc cgtgcttcag agccaact 386435DNAArtificial Sequenceprimer_bind BacRp 2 64cctatatctc gagtttcttt tctataacaa ccttt 356540DNAArtificial Sequenceprimer_bind SAK_bac Fp1 65atggatccat ggtcaagttc attcgacaaa ggaaaatata 406638DNAArtificial Sequenceprimer_bind SAK_bac Rp2 66tatattctcg agtcctgagt cacagtctgt gccaatgt 386736DNAArtificial Sequenceprimer_bind E 4 Fp 1 67atggatctcg agaaaagagt ggacccgtgc ttcaga 366843DNAArtificial Sequenceprimer_bind E6 Rp 2 68ccgacaattc taggtttaat gccggagtca cagtcagtgc caa 436949DNAArtificial Sequenceprimer_bind TCS SAK Fp 3 69ggcattaaac ctagaattgt cggatcaagt tcattcgata aaggaaaat 497040DNAArtificial Sequenceprimer_bind TCS SAK Rp4 70ttatatcgcg gccgcttatt tcttttctat aacaaccttt 407148DNAArtificial Sequenceprimer_bind tPA_Fp 1 71ggataactcg agaaaagaga ggctcaagag attcatgcta gattcaga 487244DNAArtificial Sequenceprimer_bind tPA Rp 2 72tcatatcgcg gccgctggtc tcatgttatc tctgatccag tcca 447348DNAArtificial Sequenceprimer_bind Fin Fp 1 73ggataactcg agaaaagaga ggctcaagag attcatgcta gattcaga 487442DNAArtificial Sequenceprimer_bind Fin Rp2 74ggctctaaag caagggtcaa ctgatttaac tggaacacta tg 427542DNAArtificial Sequenceprimer_bind EGF Fp3 75catagtgttc cagttaaatc agttgaccct tgctttagag cc 427645DNAArtificial Sequenceprimer_bind EGF RP 4 76agctctggtt ccggaatcac agtcagtacc tatatgtctt gccaa 457745DNAArtificial Sequenceprimer_bind K1 Fp 5 77ttggcaagac atataggtac tgactgtgat tccggaacca gagct 457844DNAArtificial Sequenceprimer_bind CD Rp 2 78tcatatcgcg gccgctggtc tcatgttatc tctgatccag tcca 447948DNAArtificial Sequenceprimer_bind Fg Fp 1 79ggataactcg agaaaagaga ggctcaagag attcatgcta gattcaga 488042DNAArtificial Sequenceprimer_bind Fg Rp2 80tctaaagcaa gggtcaactg atttaactgg aacactatga ca 428142DNAArtificial Sequenceprimer_bind EFI Fp3 81tgtcatagtg ttccagttaa atcagttgac ccttgcttta ga 428245DNAArtificial Sequenceprimer_bind EFI RP 4 82atcactgttt ccggaatcac aatcagtacc aatatgtctt gccaa 458344DNAArtificial Sequenceprimer_bind K2 Fp 5 83ttggcaagac atattggtac tgattgtgat tccggaaaca gtga 448444DNAArtificial Sequenceprimer_bind K2CD Rp 6 84tcatatcgcg gccgctggtc tcatgttatc tctgatccag tcca 448542DNAArtificial Sequenceprimer_bind N_EtPA Fp1 85ggatatctcg agaaaagagt tgacccttgc ttcagagcca ac 428642DNAArtificial Sequenceprimer_bind N_EtPA Rp 2 86aaagtaacaa tcactatttg acttgactgg aacactatga ca 428742DNAArtificial Sequenceprimer_bind EK2 CD Fp 3 87tgtcatagtg ttccagtcaa gtcaaatagt gattgttact tt 428844DNAArtificial Sequenceprimer_bind K2 CD Rp 4 88tcatatcgcg gccgctggtc tcatgttatc tctgatccag tcca 448948DNAArtificial Sequenceprimer_bind Finger Fp1 89ggataactcg agaaaagaga ggctcaagag attcatgcta gattcaga 489042DNAArtificial Sequenceprimer_bind Finger Rp 2 90aaagtaacaa tcactatttg acttgactgg aacactatga ca 429142DNAArtificial Sequenceprimer_bind K2 CD Fp 3 91tgtcatagtg ttccagtcaa gtcaaatagt gattgttact tt 429243DNAArtificial Sequenceprimer_bind EGF Rp 4 92ccatatcgcg gccgcttaac ctgagtcaca atctgttcca ata 439342DNAArtificial Sequenceprimer_bind EGF CD Fp1 93gttgaccctt gctttagagc caactgtgaa taccaatgcc ag 429442DNAArtificial Sequenceprimer_bind EF CD Rp 2 94ctggcattgg tattcacagt tggctctaaa gcaagggtca ac 429542DNAArtificial Sequenceprimer_bind K2 CD Fp 3 95gttgaccctt gctttagagc caactgtgaa taccaatgcc ag 429641DNAArtificial Sequenceprimer_bind K2 CD Rp 4 96tttatacgcg gccgctggtc tcatgttatc tctgatccag t 419740DNAArtificial Sequenceprimer_bind Met rep Val Fp 97catgaaccac atagatgtca agtattctgc aaccagactg 409840DNAArtificial Sequenceprimer_bind Met rep Val Rp 98cagtctggtt gcagaatact tgacatctat gtggttcatg 409940DNAArtificial Sequenceprimer_bind Met rep Ala Fp 99catgaaccac atagatgtca agcattctgc aaccagactg 4010040DNAArtificial Sequenceprimer_bind Met rep Ala Rp 100cagtctggtt gcagaatgct tgacatctat gtggttcatg 4010140DNAArtificial Sequenceprimer_bind Met rep Glu Fp 101catgaaccac atagatgtca acaattctgc aaccagactg 4010240DNAArtificial Sequenceprimer_bind Met rep Glu Rp 102cagtctggtt gcagaattgt tgacatctat gtggttcatg 4010340DNAArtificial Sequenceprimer_bind T 115 N Fp 103cagggaatct catatagagg taattggtct acagctgagt 4010440DNAArtificial Sequenceprimer_bind T 115 N Rp 104actcagctgt agaccaatta cctctatatg agattccctg 4010531DNAArtificial Sequenceprimer_bind N129 Q Fp 105aatgtactaa ctggcaatct tccgctttgg c 3110631DNAArtificial Sequenceprimer_bind N129 Q Rp 106gccaaagcgg aagattgcca gttagtacat t 3110748DNAArtificial Sequenceprimer_bind KH Fp 1 107ggataactcg agaaaagaga ggctcaagag attcatgcta gattcaga 4810833DNAArtificial Sequenceprimer_bind KH Rp 2 108agcagcggca gcagcaaaaa tggcagcctg cca 3310937DNAArtificial Sequenceprimer_bind KH Fp 3 109gctgctgccg ctgcttcccc tggagagaga ttccttt 3711044DNAArtificial Sequenceprimer_bind KH Rp4 110tcatatcgcg gccgctggtc tcatgttatc tctgatccag tcca 44111118PRTHomo sapiens 111Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly 115 112414PRTStreptococcus equisimilis 112Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg Pro Ser Val Asn Asn Ser 1 5 10 15 Gln Leu Val Val Ser Val Ala Gly Thr Val Glu Gly Thr Asn Gln Asp 20 25 30 Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr Ser Arg Pro Ala His 35 40 45 Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys Ser Lys Pro Phe Ala 50 55 60 Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu Lys Ala Asp Leu Leu 65 70 75 80 Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val His Ser Asn Asp Asp 85 90 95 Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala Thr Ile Thr Asp Arg 100 105 110 Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly Ser Val Thr Leu Pro 115 120 125 Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly His Val Arg Val Arg 130 135 140 Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala Lys Ser Val Asp Val 145 150 155 160 Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro Asp Asp Asp Phe Arg 165 170 175 Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr Leu Ala Ile Gly Asp 180 185 190 Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala Gln Ser Ile Leu Asn 195 200 205 Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg Asp Ser Ser Ile Val 210 215 220 Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu Pro Met Asp Gln Glu 225 230 235 240 Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala Tyr Arg Ile Asn Lys 245 250 255 Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr Asp Leu Ile Ser Glu 260 265 270 Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro Tyr Asp Pro Phe Asp 275 280 285 Arg Ser His Leu Lys Leu Phe Thr Ile Lys Tyr Val Asp Val Asp Thr 290 295 300 Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu Thr Ala Ser Glu Arg Asn 305 310 315 320 Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg Asp Lys Ala Lys Leu Leu 325 330 335 Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met Asp Tyr Thr Leu Thr Gly 340 345 350 Lys Val Glu Asp Asn His Asp Asp Thr Asn Arg Ile Ile Thr Val Tyr 355 360 365 Met Gly Lys Arg Pro Glu Gly Glu Asn Ala Ser Tyr His Leu Ala Tyr 370 375 380 Asp Lys Asp Arg Tyr Thr Glu Glu Glu Arg Glu Val Tyr Ser Tyr Leu 385 390 395 400 Arg Tyr Thr Gly Thr Pro Ile Pro Asp Asn Pro Asn Asp Lys 405 410 113532PRTArtificial SequenceFUSION PROTIEN - N_EGF _SK 113Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg 115 120 125 Pro Ser Val Asn Asn Ser Gln Leu Val Val Ser Val Ala Gly Thr Val 130 135 140 Glu Gly Thr Asn Gln Asp Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu 145 150 155 160 Thr Ser Arg Pro Ala His Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro 165 170 175 Lys Ser Lys Pro Phe Ala Thr Asp Ser Gly Ala Met Ser His Lys Leu 180 185 190 Glu Lys Ala Asp Leu Leu Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn 195 200 205 Val His Ser Asn Asp Asp Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp 210 215 220 Ala Thr Ile Thr Asp Arg Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp 225 230 235 240 Gly Ser Val Thr Leu Pro Thr Gln Pro Val Gln Glu Phe Leu Leu Ser 245 250 255 Gly His Val Arg Val Arg Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln 260 265 270 Ala Lys Ser Val Asp Val Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn 275 280 285 Pro Asp Asp Asp Phe Arg Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys 290 295 300 Thr Leu Ala Ile Gly Asp Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln 305 310

315 320 Ala Gln Ser Ile Leu Asn Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu 325 330 335 Arg Asp Ser Ser Ile Val Thr His Asp Asn Asp Ile Phe Arg Thr Ile 340 345 350 Leu Pro Met Asp Gln Glu Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln 355 360 365 Ala Tyr Arg Ile Asn Lys Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn 370 375 380 Thr Asp Leu Ile Ser Glu Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys 385 390 395 400 Pro Tyr Asp Pro Phe Asp Arg Ser His Leu Lys Leu Phe Thr Ile Lys 405 410 415 Tyr Val Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu 420 425 430 Thr Ala Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg 435 440 445 Asp Lys Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met 450 455 460 Asp Tyr Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn 465 470 475 480 Arg Ile Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala 485 490 495 Ser Tyr His Leu Ala Tyr Asp Lys Asp Arg Tyr Thr Glu Glu Glu Arg 500 505 510 Glu Val Tyr Ser Tyr Leu Arg Tyr Thr Gly Thr Pro Ile Pro Asp Asn 515 520 525 Pro Asn Asp Lys 530 114511PRTArtificial SequenceFUSION PROTEIN - SK_EGF 114Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg Pro Ser Val Asn Asn Ser 1 5 10 15 Gln Leu Val Val Ser Val Ala Gly Thr Val Glu Gly Thr Asn Gln Asp 20 25 30 Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr Ser Arg Pro Ala His 35 40 45 Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys Ser Lys Pro Phe Ala 50 55 60 Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu Lys Ala Asp Leu Leu 65 70 75 80 Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val His Ser Asn Asp Asp 85 90 95 Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala Thr Ile Thr Asp Arg 100 105 110 Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly Ser Val Thr Leu Pro 115 120 125 Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly His Val Arg Val Arg 130 135 140 Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala Lys Ser Val Asp Val 145 150 155 160 Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro Asp Asp Asp Phe Arg 165 170 175 Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr Leu Ala Ile Gly Asp 180 185 190 Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala Gln Ser Ile Leu Asn 195 200 205 Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg Asp Ser Ser Ile Val 210 215 220 Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu Pro Met Asp Gln Glu 225 230 235 240 Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala Tyr Arg Ile Asn Lys 245 250 255 Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr Asp Leu Ile Ser Glu 260 265 270 Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro Tyr Asp Pro Phe Asp 275 280 285 Arg Ser His Leu Lys Leu Phe Thr Ile Lys Tyr Val Asp Val Asp Thr 290 295 300 Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu Thr Ala Ser Glu Arg Asn 305 310 315 320 Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg Asp Lys Ala Lys Leu Leu 325 330 335 Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met Asp Tyr Thr Leu Thr Gly 340 345 350 Lys Val Glu Asp Asn His Asp Asp Thr Asn Arg Ile Ile Thr Val Tyr 355 360 365 Met Gly Lys Arg Pro Glu Gly Glu Asn Ala Ser Tyr His Leu Ala Gly 370 375 380 Gly Gly Val Gln Ala Gln Gln Ile Val Val Asp Pro Cys Phe Arg Ala 385 390 395 400 Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln Thr Ser Tyr Leu Cys 405 410 415 Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His Glu Pro His Arg Cys 420 425 430 Gln Met Phe Cys Asn Gln Thr Ala Cys Pro Ala Asp Cys Asp Pro Asn 435 440 445 Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr Ile Leu Asp Asp Gly 450 455 460 Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn Gly Gly Phe Cys Ser 465 470 475 480 Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu Cys Ile Cys Gly Pro 485 490 495 Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp Cys Asp Ser Gly 500 505 510 115629PRTArtificial SequenceFUSION PROTEIN - N_EGF_SK_EGF 115Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg 115 120 125 Pro Ser Val Asn Asn Ser Gln Leu Val Val Ser Val Ala Gly Thr Val 130 135 140 Glu Gly Thr Asn Gln Asp Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu 145 150 155 160 Thr Ser Arg Pro Ala His Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro 165 170 175 Lys Ser Lys Pro Phe Ala Thr Asp Ser Gly Ala Met Ser His Lys Leu 180 185 190 Glu Lys Ala Asp Leu Leu Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn 195 200 205 Val His Ser Asn Asp Asp Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp 210 215 220 Ala Thr Ile Thr Asp Arg Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp 225 230 235 240 Gly Ser Val Thr Leu Pro Thr Gln Pro Val Gln Glu Phe Leu Leu Ser 245 250 255 Gly His Val Arg Val Arg Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln 260 265 270 Ala Lys Ser Val Asp Val Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn 275 280 285 Pro Asp Asp Asp Phe Arg Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys 290 295 300 Thr Leu Ala Ile Gly Asp Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln 305 310 315 320 Ala Gln Ser Ile Leu Asn Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu 325 330 335 Arg Asp Ser Ser Ile Val Thr His Asp Asn Asp Ile Phe Arg Thr Ile 340 345 350 Leu Pro Met Asp Gln Glu Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln 355 360 365 Ala Tyr Arg Ile Asn Lys Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn 370 375 380 Thr Asp Leu Ile Ser Glu Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys 385 390 395 400 Pro Tyr Asp Pro Phe Asp Arg Ser His Leu Lys Leu Phe Thr Ile Lys 405 410 415 Tyr Val Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu 420 425 430 Thr Ala Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg 435 440 445 Asp Lys Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met 450 455 460 Asp Tyr Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn 465 470 475 480 Arg Ile Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala 485 490 495 Ser Tyr His Leu Ala Gly Gly Gly Val Gln Ala Gln Gln Ile Val Val 500 505 510 Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn 515 520 525 Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro 530 535 540 His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro 545 550 555 560 Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly 565 570 575 Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu 580 585 590 Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe 595 600 605 Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr 610 615 620 Asp Cys Asp Ser Gly 625 116534PRTArtificial SequenceFUSION PROTEIN - INTERDOMAIN SK_EGF ALPHA AND BETA 116Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg Pro Ser Val Asn Asn Ser 1 5 10 15 Gln Leu Val Val Ser Val Ala Gly Thr Val Glu Gly Thr Asn Gln Asp 20 25 30 Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr Ser Arg Pro Ala His 35 40 45 Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys Ser Lys Pro Phe Ala 50 55 60 Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu Lys Ala Asp Leu Leu 65 70 75 80 Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val His Ser Asn Asp Asp 85 90 95 Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala Thr Ile Thr Asp Arg 100 105 110 Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly Ser Val Thr Leu Pro 115 120 125 Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly His Val Arg Val Arg 130 135 140 Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala Lys Ser Glu Pro Val 145 150 155 160 Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn 165 170 175 Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro 180 185 190 His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro 195 200 205 Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly 210 215 220 Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu 225 230 235 240 Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe 245 250 255 Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr 260 265 270 Asp Cys Asp Ser Gly Val Asp Val Glu Tyr Thr Val Gln Phe Thr Pro 275 280 285 Leu Asn Pro Asp Asp Asp Phe Arg Pro Gly Leu Lys Asp Thr Lys Leu 290 295 300 Leu Lys Thr Leu Ala Ile Gly Asp Thr Ile Thr Ser Gln Glu Leu Leu 305 310 315 320 Ala Gln Ala Gln Ser Ile Leu Asn Lys Asn His Pro Gly Tyr Thr Ile 325 330 335 Tyr Glu Arg Asp Ser Ser Ile Val Thr His Asp Asn Asp Ile Phe Arg 340 345 350 Thr Ile Leu Pro Met Asp Gln Glu Phe Thr Tyr Arg Val Lys Asn Arg 355 360 365 Glu Gln Ala Tyr Arg Ile Asn Lys Lys Ser Gly Leu Asn Glu Glu Ile 370 375 380 Asn Asn Thr Asp Leu Ile Ser Glu Lys Tyr Tyr Val Leu Lys Lys Gly 385 390 395 400 Glu Lys Pro Tyr Asp Pro Phe Asp Arg Ser His Leu Lys Leu Phe Thr 405 410 415 Ile Lys Tyr Val Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln 420 425 430 Leu Leu Thr Ala Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp 435 440 445 Pro Arg Asp Lys Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly 450 455 460 Ile Met Asp Tyr Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp 465 470 475 480 Thr Asn Arg Ile Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu 485 490 495 Asn Ala Ser Tyr His Leu Ala Tyr Asp Lys Asp Arg Tyr Thr Glu Glu 500 505 510 Glu Arg Glu Val Tyr Ser Tyr Leu Arg Tyr Thr Gly Thr Pro Ile Pro 515 520 525 Asp Asn Pro Asn Asp Lys 530 117643PRTArtificial SequenceFUSION PROTEIN - TG_N_EGF _TCS_SK_EGF 117Val Gln Ala Gln Gln Ile Val Val Asp Pro Cys Phe Arg Ala Asn Cys 1 5 10 15 Glu Tyr Gln Cys Gln Pro Leu Asn Gln Thr Ser Tyr Leu Cys Val Cys 20 25 30 Ala Glu Gly Phe Ala Pro Ile Pro His Glu Pro His Arg Cys Gln Val 35 40 45 Phe Cys Asn Gln Thr Ala Cys Pro Ala Asp Cys Asp Pro Asn Thr Gln 50 55 60 Ala Ser Cys Glu Cys Pro Glu Gly Tyr Ile Leu Asp Asp Gly Phe Ile 65 70 75 80 Cys Thr Asp Ile Asp Glu Cys Glu Asn Gly Gly Phe Cys Ser Gly Val 85 90 95 Cys His Asn Leu Pro Gly Thr Phe Glu Cys Ile Cys Gly Pro Asp Ser 100 105 110 Ala Leu Ala Arg His Ile Gly Thr Asp Cys Asp Ser Gly Ile Lys Pro 115 120 125 Arg Ile Val Gly Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg Pro Ser 130 135 140 Val Asn Asn Ser Gln Leu Val Val Ser Val Ala Gly Thr Val Glu Gly 145 150 155 160 Thr Asn Gln Asp Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr Ser 165 170 175 Arg Pro Ala His Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys Ser 180 185 190 Lys Pro Phe Ala Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu Lys 195 200 205 Ala Asp Leu Leu Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val His 210 215 220 Ser Asn Asp Asp Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala Thr 225 230 235 240 Ile Thr Asp Arg Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly Ser 245 250 255 Val Thr Leu Pro Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly His 260 265 270 Val Arg Val Arg Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala Lys 275 280 285 Ser Val Asp Val Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro Asp 290 295 300 Asp Asp Phe Arg Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr Leu 305 310 315 320 Ala Ile Gly Asp Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala Gln 325 330 335 Ser Ile Leu Asn Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg Asp 340 345 350 Ser Ser Ile Val Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu Pro 355 360 365 Met Asp Gln Glu Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala Tyr 370 375

380 Arg Ile Asn Lys Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr Asp 385 390 395 400 Leu Ile Ser Glu Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro Tyr 405 410 415 Asp Pro Phe Asp Arg Ser His Leu Lys Leu Phe Thr Ile Lys Tyr Val 420 425 430 Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu Thr Ala 435 440 445 Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg Asp Lys 450 455 460 Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met Asp Tyr 465 470 475 480 Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn Arg Ile 485 490 495 Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala Ser Tyr 500 505 510 His Leu Ala Gly Gly Gly Val Gln Ala Gln Gln Ile Val Val Asp Pro 515 520 525 Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln Thr 530 535 540 Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His Glu 545 550 555 560 Pro His Arg Cys Gln Val Phe Cys Asn Gln Thr Ala Cys Pro Ala Asp 565 570 575 Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr Ile 580 585 590 Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn Gly 595 600 605 Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu Cys 610 615 620 Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp Cys 625 630 635 640 Asp Ser Gly 118124PRTArtificial SequenceFUSION PROTEIN - EGF _SAK 118Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly Gly Gly Pro Gln Val Lys 115 120 119256PRTArtificial SequenceFUSION PROTEIN - SAK _EGF 119Ser Ser Ser Phe Asp Lys Gly Lys Tyr Lys Lys Gly Asp Asp Ala Ser 1 5 10 15 Tyr Phe Glu Pro Thr Gly Pro Tyr Leu Met Val Asn Val Thr Gly Val 20 25 30 Asp Ser Lys Gly Asn Glu Leu Leu Ser Pro His Tyr Val Glu Phe Pro 35 40 45 Ile Lys Pro Gly Thr Thr Leu Thr Lys Glu Lys Ile Glu Tyr Tyr Val 50 55 60 Glu Trp Ala Leu Asp Ala Thr Ala Tyr Lys Glu Phe Arg Val Val Glu 65 70 75 80 Leu Asp Pro Ser Ala Lys Ile Glu Val Thr Tyr Tyr Asp Lys Asn Lys 85 90 95 Lys Lys Glu Glu Thr Lys Ser Phe Pro Ile Thr Glu Lys Gly Phe Val 100 105 110 Val Pro Asp Leu Ser Glu His Ile Lys Asn Pro Gly Phe Asn Leu Ile 115 120 125 Thr Lys Val Val Ile Glu Lys Lys Glu Pro Val Asp Pro Cys Phe Arg 130 135 140 Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln Thr Ser Tyr Leu 145 150 155 160 Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His Glu Pro His Arg 165 170 175 Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro Ala Asp Cys Asp Pro 180 185 190 Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr Ile Leu Asp Asp 195 200 205 Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn Gly Gly Phe Cys 210 215 220 Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu Cys Ile Cys Gly 225 230 235 240 Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp Cys Asp Ser Gly 245 250 255 120539PRTArtificial SequenceFROM CUSTOME SYNTHESIZED DNA - TPA =SEQ 120Gln Glu Ile His Ala Arg Phe Arg Arg Gly Ala Arg Ser Tyr Gln Val 1 5 10 15 Ile Cys Arg Asp Glu Lys Thr Gln Met Ile Tyr Gln Gln His Gln Ser 20 25 30 Trp Leu Arg Pro Val Leu Arg Ser Asn Arg Val Glu Tyr Cys Trp Cys 35 40 45 Asn Ser Gly Arg Ala Gln Cys His Ser Val Pro Val Lys Ser Cys Ser 50 55 60 Glu Pro Arg Cys Phe Asn Gly Gly Thr Cys Gln Gln Ala Leu Tyr Phe 65 70 75 80 Ser Asp Phe Val Cys Gln Cys Pro Glu Gly Phe Ala Gly Lys Cys Cys 85 90 95 Glu Ile Asp Thr Arg Ala Thr Cys Tyr Glu Asp Gln Gly Ile Ser Tyr 100 105 110 Arg Gly Thr Trp Ser Thr Ala Glu Ser Gly Ala Glu Cys Thr Asn Trp 115 120 125 Asn Ser Ser Ala Leu Ala Gln Lys Pro Tyr Ser Gly Arg Arg Pro Asp 130 135 140 Ala Ile Arg Leu Gly Leu Gly Asn His Asn Tyr Cys Arg Asn Pro Asp 145 150 155 160 Arg Asp Ser Lys Pro Trp Cys Tyr Val Phe Lys Ala Gly Lys Tyr Ser 165 170 175 Ser Glu Phe Cys Ser Thr Pro Ala Cys Ser Glu Gly Asn Ser Asp Cys 180 185 190 Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly Thr His Ser Leu Thr Glu 195 200 205 Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser Met Ile Leu Ile Gly Lys 210 215 220 Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln Ala Leu Gly Leu Gly Lys 225 230 235 240 His Asn Tyr Cys Arg Asn Pro Asp Gly Asp Ala Lys Pro Trp Cys His 245 250 255 Val Leu Lys Asn Arg Arg Leu Thr Trp Glu Tyr Cys Asp Val Pro Ser 260 265 270 Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser Gln Pro Gln Phe Arg Ile 275 280 285 Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser His Pro Trp Gln Ala Ala 290 295 300 Ile Phe Ala Lys His Arg Arg Ser Pro Gly Glu Arg Phe Leu Cys Gly 305 310 315 320 Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu Ser Ala Ala His Cys Phe 325 330 335 Gln Glu Arg Phe Pro Pro His His Leu Thr Val Ile Leu Gly Arg Thr 340 345 350 Tyr Arg Val Val Pro Gly Glu Glu Glu Gln Lys Phe Glu Val Glu Lys 355 360 365 Tyr Ile Val His Lys Glu Phe Asp Asp Asp Thr Tyr Asp Asn Asp Ile 370 375 380 Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser Arg Cys Ala Gln Glu Ser 385 390 395 400 Ser Val Val Arg Thr Val Cys Leu Pro Pro Ala Asp Leu Gln Leu Pro 405 410 415 Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr Gly Lys His Glu Ala Leu 420 425 430 Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu Ala His Val Arg Leu Tyr 435 440 445 Pro Ser Ser Arg Cys Thr Ser Gln His Leu Leu Asn Arg Thr Val Thr 450 455 460 Asp Asn Met Leu Cys Ala Gly Asp Thr Arg Ser Gly Gly Pro Gln Ala 465 470 475 480 Asn Leu His Asp Ala Cys Gln Gly Asp Ser Gly Gly Pro Leu Val Cys 485 490 495 Leu Asn Asp Gly Arg Met Thr Leu Val Gly Ile Ile Ser Trp Gly Leu 500 505 510 Gly Cys Gly Gln Lys Asp Val Pro Gly Val Tyr Thr Lys Val Thr Asn 515 520 525 Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg Pro 530 535 121775PRTArtificial SequenceFUSION PROTEIN - N_EGF_TPA_EGF 121Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly Gln Glu Ile His Ala Arg Phe Arg Arg Gly 115 120 125 Ala Arg Ser Tyr Gln Val Ile Cys Arg Asp Glu Lys Thr Gln Met Ile 130 135 140 Tyr Gln Gln His Gln Ser Trp Leu Arg Pro Val Leu Arg Ser Asn Arg 145 150 155 160 Val Glu Tyr Cys Trp Cys Asn Ser Gly Arg Ala Gln Cys His Ser Val 165 170 175 Pro Val Lys Ser Cys Ser Glu Pro Arg Cys Phe Asn Gly Gly Thr Cys 180 185 190 Gln Gln Ala Leu Tyr Phe Ser Asp Phe Val Cys Gln Cys Pro Glu Gly 195 200 205 Phe Ala Gly Lys Cys Cys Glu Ile Asp Thr Arg Ala Thr Cys Tyr Glu 210 215 220 Asp Gln Gly Ile Ser Tyr Arg Gly Thr Trp Ser Thr Ala Glu Ser Gly 225 230 235 240 Ala Glu Cys Thr Asn Trp Asn Ser Ser Ala Leu Ala Gln Lys Pro Tyr 245 250 255 Ser Gly Arg Arg Pro Asp Ala Ile Arg Leu Gly Leu Gly Asn His Asn 260 265 270 Tyr Cys Arg Asn Pro Asp Arg Asp Ser Lys Pro Trp Cys Tyr Val Phe 275 280 285 Lys Ala Gly Lys Tyr Ser Ser Glu Phe Cys Ser Thr Pro Ala Cys Ser 290 295 300 Glu Gly Asn Ser Asp Cys Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly 305 310 315 320 Thr His Ser Leu Thr Glu Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser 325 330 335 Met Ile Leu Ile Gly Lys Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln 340 345 350 Ala Leu Gly Leu Gly Lys His Asn Tyr Cys Arg Asn Pro Asp Gly Asp 355 360 365 Ala Lys Pro Trp Cys His Val Leu Lys Asn Arg Arg Leu Thr Trp Glu 370 375 380 Tyr Cys Asp Val Pro Ser Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser 385 390 395 400 Gln Pro Gln Phe Arg Ile Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser 405 410 415 His Pro Trp Gln Ala Ala Ile Phe Ala Lys His Arg Arg Ser Pro Gly 420 425 430 Glu Arg Phe Leu Cys Gly Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu 435 440 445 Ser Ala Ala His Cys Phe Gln Glu Arg Phe Pro Pro His His Leu Thr 450 455 460 Val Ile Leu Gly Arg Thr Tyr Arg Val Val Pro Gly Glu Glu Glu Gln 465 470 475 480 Lys Phe Glu Val Glu Lys Tyr Ile Val His Lys Glu Phe Asp Asp Asp 485 490 495 Thr Tyr Asp Asn Asp Ile Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser 500 505 510 Arg Cys Ala Gln Glu Ser Ser Val Val Arg Thr Val Cys Leu Pro Pro 515 520 525 Ala Asp Leu Gln Leu Pro Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr 530 535 540 Gly Lys His Glu Ala Leu Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu 545 550 555 560 Ala His Val Arg Leu Tyr Pro Ser Ser Arg Cys Thr Ser Gln His Leu 565 570 575 Leu Asn Arg Thr Val Thr Asp Asn Met Leu Cys Ala Gly Asp Thr Arg 580 585 590 Ser Gly Gly Pro Gln Ala Asn Leu His Asp Ala Cys Gln Gly Asp Ser 595 600 605 Gly Gly Pro Leu Val Cys Leu Asn Asp Gly Arg Met Thr Leu Val Gly 610 615 620 Ile Ile Ser Trp Gly Leu Gly Cys Gly Gln Lys Asp Val Pro Gly Val 625 630 635 640 Tyr Thr Lys Val Thr Asn Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg 645 650 655 Pro Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro 660 665 670 Leu Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro 675 680 685 Ile Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala 690 695 700 Cys Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro 705 710 715 720 Glu Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu 725 730 735 Cys Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly 740 745 750 Thr Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile 755 760 765 Gly Thr Asp Cys Asp Ser Gly 770 775 122657PRTArtificial SequenceFUSION PROTEIN - N_EGF_TPA 122Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly Gln Glu Ile His Ala Arg Phe Arg Arg Gly 115 120 125 Ala Arg Ser Tyr Gln Val Ile Cys Arg Asp Glu Lys Thr Gln Met Ile 130 135 140 Tyr Gln Gln His Gln Ser Trp Leu Arg Pro Val Leu Arg Ser Asn Arg 145 150 155 160 Val Glu Tyr Cys Trp Cys Asn Ser Gly Arg Ala Gln Cys His Ser Val 165 170 175 Pro Val Lys Ser Cys Ser Glu Pro Arg Cys Phe Asn Gly Gly Thr Cys 180 185 190 Gln Gln Ala Leu Tyr Phe Ser Asp Phe Val Cys Gln Cys Pro Glu Gly 195 200 205 Phe Ala Gly Lys Cys Cys Glu Ile Asp Thr Arg Ala Thr Cys Tyr Glu 210 215 220 Asp Gln Gly Ile Ser Tyr Arg Gly Thr Trp Ser Thr Ala Glu Ser Gly 225 230 235 240 Ala Glu Cys Thr Asn Trp Asn Ser Ser Ala Leu Ala Gln Lys Pro Tyr 245 250 255 Ser Gly Arg Arg Pro Asp Ala Ile Arg Leu Gly Leu Gly Asn His Asn 260 265 270 Tyr Cys Arg Asn Pro Asp Arg Asp Ser Lys Pro Trp Cys Tyr Val Phe 275 280 285 Lys Ala Gly Lys Tyr Ser Ser Glu Phe Cys Ser Thr Pro Ala Cys Ser 290 295 300 Glu Gly Asn Ser Asp Cys

Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly 305 310 315 320 Thr His Ser Leu Thr Glu Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser 325 330 335 Met Ile Leu Ile Gly Lys Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln 340 345 350 Ala Leu Gly Leu Gly Lys His Asn Tyr Cys Arg Asn Pro Asp Gly Asp 355 360 365 Ala Lys Pro Trp Cys His Val Leu Lys Asn Arg Arg Leu Thr Trp Glu 370 375 380 Tyr Cys Asp Val Pro Ser Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser 385 390 395 400 Gln Pro Gln Phe Arg Ile Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser 405 410 415 His Pro Trp Gln Ala Ala Ile Phe Ala Lys His Arg Arg Ser Pro Gly 420 425 430 Glu Arg Phe Leu Cys Gly Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu 435 440 445 Ser Ala Ala His Cys Phe Gln Glu Arg Phe Pro Pro His His Leu Thr 450 455 460 Val Ile Leu Gly Arg Thr Tyr Arg Val Val Pro Gly Glu Glu Glu Gln 465 470 475 480 Lys Phe Glu Val Glu Lys Tyr Ile Val His Lys Glu Phe Asp Asp Asp 485 490 495 Thr Tyr Asp Asn Asp Ile Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser 500 505 510 Arg Cys Ala Gln Glu Ser Ser Val Val Arg Thr Val Cys Leu Pro Pro 515 520 525 Ala Asp Leu Gln Leu Pro Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr 530 535 540 Gly Lys His Glu Ala Leu Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu 545 550 555 560 Ala His Val Arg Leu Tyr Pro Ser Ser Arg Cys Thr Ser Gln His Leu 565 570 575 Leu Asn Arg Thr Val Thr Asp Asn Met Leu Cys Ala Gly Asp Thr Arg 580 585 590 Ser Gly Gly Pro Gln Ala Asn Leu His Asp Ala Cys Gln Gly Asp Ser 595 600 605 Gly Gly Pro Leu Val Cys Leu Asn Asp Gly Arg Met Thr Leu Val Gly 610 615 620 Ile Ile Ser Trp Gly Leu Gly Cys Gly Gln Lys Asp Val Pro Gly Val 625 630 635 640 Tyr Thr Lys Val Thr Asn Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg 645 650 655 Pro 123657PRTArtificial SequenceFUSION PROTEIN - TPA _EGF 123Gln Glu Ile His Ala Arg Phe Arg Arg Gly Ala Arg Ser Tyr Gln Val 1 5 10 15 Ile Cys Arg Asp Glu Lys Thr Gln Met Ile Tyr Gln Gln His Gln Ser 20 25 30 Trp Leu Arg Pro Val Leu Arg Ser Asn Arg Val Glu Tyr Cys Trp Cys 35 40 45 Asn Ser Gly Arg Ala Gln Cys His Ser Val Pro Val Lys Ser Cys Ser 50 55 60 Glu Pro Arg Cys Phe Asn Gly Gly Thr Cys Gln Gln Ala Leu Tyr Phe 65 70 75 80 Ser Asp Phe Val Cys Gln Cys Pro Glu Gly Phe Ala Gly Lys Cys Cys 85 90 95 Glu Ile Asp Thr Arg Ala Thr Cys Tyr Glu Asp Gln Gly Ile Ser Tyr 100 105 110 Arg Gly Thr Trp Ser Thr Ala Glu Ser Gly Ala Glu Cys Thr Asn Trp 115 120 125 Asn Ser Ser Ala Leu Ala Gln Lys Pro Tyr Ser Gly Arg Arg Pro Asp 130 135 140 Ala Ile Arg Leu Gly Leu Gly Asn His Asn Tyr Cys Arg Asn Pro Asp 145 150 155 160 Arg Asp Ser Lys Pro Trp Cys Tyr Val Phe Lys Ala Gly Lys Tyr Ser 165 170 175 Ser Glu Phe Cys Ser Thr Pro Ala Cys Ser Glu Gly Asn Ser Asp Cys 180 185 190 Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly Thr His Ser Leu Thr Glu 195 200 205 Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser Met Ile Leu Ile Gly Lys 210 215 220 Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln Ala Leu Gly Leu Gly Lys 225 230 235 240 His Asn Tyr Cys Arg Asn Pro Asp Gly Asp Ala Lys Pro Trp Cys His 245 250 255 Val Leu Lys Asn Arg Arg Leu Thr Trp Glu Tyr Cys Asp Val Pro Ser 260 265 270 Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser Gln Pro Gln Phe Arg Ile 275 280 285 Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser His Pro Trp Gln Ala Ala 290 295 300 Ile Phe Ala Lys His Arg Arg Ser Pro Gly Glu Arg Phe Leu Cys Gly 305 310 315 320 Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu Ser Ala Ala His Cys Phe 325 330 335 Gln Glu Arg Phe Pro Pro His His Leu Thr Val Ile Leu Gly Arg Thr 340 345 350 Tyr Arg Val Val Pro Gly Glu Glu Glu Gln Lys Phe Glu Val Glu Lys 355 360 365 Tyr Ile Val His Lys Glu Phe Asp Asp Asp Thr Tyr Asp Asn Asp Ile 370 375 380 Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser Arg Cys Ala Gln Glu Ser 385 390 395 400 Ser Val Val Arg Thr Val Cys Leu Pro Pro Ala Asp Leu Gln Leu Pro 405 410 415 Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr Gly Lys His Glu Ala Leu 420 425 430 Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu Ala His Val Arg Leu Tyr 435 440 445 Pro Ser Ser Arg Cys Thr Ser Gln His Leu Leu Asn Arg Thr Val Thr 450 455 460 Asp Asn Met Leu Cys Ala Gly Asp Thr Arg Ser Gly Gly Pro Gln Ala 465 470 475 480 Asn Leu His Asp Ala Cys Gln Gly Asp Ser Gly Gly Pro Leu Val Cys 485 490 495 Leu Asn Asp Gly Arg Met Thr Leu Val Gly Ile Ile Ser Trp Gly Leu 500 505 510 Gly Cys Gly Gln Lys Asp Val Pro Gly Val Tyr Thr Lys Val Thr Asn 515 520 525 Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg Pro Val Asp Pro Cys Phe 530 535 540 Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln Thr Ser Tyr 545 550 555 560 Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His Glu Pro His 565 570 575 Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro Ala Asp Cys Asp 580 585 590 Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr Ile Leu Asp 595 600 605 Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn Gly Gly Phe 610 615 620 Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu Cys Ile Cys 625 630 635 640 Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp Cys Asp Ser 645 650 655 Gly 124620PRTArtificial SequenceFUSION PROTEIN - ID EGF TPA EGF DEL 124Gln Glu Ile His Ala Arg Phe Arg Arg Gly Ala Arg Ser Tyr Gln Val 1 5 10 15 Ile Cys Arg Asp Glu Lys Thr Gln Met Ile Tyr Gln Gln His Gln Ser 20 25 30 Trp Leu Arg Pro Val Leu Arg Ser Asn Arg Val Glu Tyr Cys Trp Cys 35 40 45 Asn Ser Gly Arg Ala Gln Cys His Ser Val Pro Val Lys Ser Val Asp 50 55 60 Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln 65 70 75 80 Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His 85 90 95 Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro Ala 100 105 110 Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr 115 120 125 Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn 130 135 140 Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu 145 150 155 160 Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp 165 170 175 Cys Asp Ser Gly Thr Arg Ala Thr Cys Tyr Glu Asp Gln Gly Ile Ser 180 185 190 Tyr Arg Gly Thr Trp Ser Thr Ala Glu Ser Gly Ala Glu Cys Thr Asn 195 200 205 Trp Asn Ser Ser Ala Leu Ala Gln Lys Pro Tyr Ser Gly Arg Arg Pro 210 215 220 Asp Ala Ile Arg Leu Gly Leu Gly Asn His Asn Tyr Cys Arg Asn Pro 225 230 235 240 Asp Arg Asp Ser Lys Pro Trp Cys Tyr Val Phe Lys Ala Gly Lys Tyr 245 250 255 Ser Ser Glu Phe Cys Ser Thr Pro Ala Cys Ser Glu Gly Asn Ser Asp 260 265 270 Cys Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly Thr His Ser Leu Thr 275 280 285 Glu Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser Met Ile Leu Ile Gly 290 295 300 Lys Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln Ala Leu Gly Leu Gly 305 310 315 320 Lys His Asn Tyr Cys Arg Asn Pro Asp Gly Asp Ala Lys Pro Trp Cys 325 330 335 His Val Leu Lys Asn Arg Arg Leu Thr Trp Glu Tyr Cys Asp Val Pro 340 345 350 Ser Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser Gln Pro Gln Phe Arg 355 360 365 Ile Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser His Pro Trp Gln Ala 370 375 380 Ala Ile Phe Ala Lys His Arg Arg Ser Pro Gly Glu Arg Phe Leu Cys 385 390 395 400 Gly Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu Ser Ala Ala His Cys 405 410 415 Phe Gln Glu Arg Phe Pro Pro His His Leu Thr Val Ile Leu Gly Arg 420 425 430 Thr Tyr Arg Val Val Pro Gly Glu Glu Glu Gln Lys Phe Glu Val Glu 435 440 445 Lys Tyr Ile Val His Lys Glu Phe Asp Asp Asp Thr Tyr Asp Asn Asp 450 455 460 Ile Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser Arg Cys Ala Gln Glu 465 470 475 480 Ser Ser Val Val Arg Thr Val Cys Leu Pro Pro Ala Asp Leu Gln Leu 485 490 495 Pro Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr Gly Lys His Glu Ala 500 505 510 Leu Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu Ala His Val Arg Leu 515 520 525 Tyr Pro Ser Ser Arg Cys Thr Ser Gln His Leu Leu Asn Arg Thr Val 530 535 540 Thr Asp Asn Met Leu Cys Ala Gly Asp Thr Arg Ser Gly Gly Pro Gln 545 550 555 560 Ala Asn Leu His Asp Ala Cys Gln Gly Asp Ser Gly Gly Pro Leu Val 565 570 575 Cys Leu Asn Asp Gly Arg Met Thr Leu Val Gly Ile Ile Ser Trp Gly 580 585 590 Leu Gly Cys Gly Gln Lys Asp Val Pro Gly Val Tyr Thr Lys Val Thr 595 600 605 Asn Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg Pro 610 615 620 125531PRTArtificial SequenceFUSION PROTEIN - ID EGF TPA EGF k1 DEL 125Gln Glu Ile His Ala Arg Phe Arg Arg Gly Ala Arg Ser Tyr Gln Val 1 5 10 15 Ile Cys Arg Asp Glu Lys Thr Gln Met Ile Tyr Gln Gln His Gln Ser 20 25 30 Trp Leu Arg Pro Val Leu Arg Ser Asn Arg Val Glu Tyr Cys Trp Cys 35 40 45 Asn Ser Gly Arg Ala Gln Cys His Ser Val Pro Val Lys Ser Val Asp 50 55 60 Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln 65 70 75 80 Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His 85 90 95 Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro Ala 100 105 110 Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr 115 120 125 Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn 130 135 140 Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu 145 150 155 160 Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp 165 170 175 Cys Asp Ser Gly Asn Ser Asp Cys Tyr Phe Gly Asn Gly Ser Ala Tyr 180 185 190 Arg Gly Thr His Ser Leu Thr Glu Ser Gly Ala Ser Cys Leu Pro Trp 195 200 205 Asn Ser Met Ile Leu Ile Gly Lys Val Tyr Thr Ala Gln Asn Pro Ser 210 215 220 Ala Gln Ala Leu Gly Leu Gly Lys His Asn Tyr Cys Arg Asn Pro Asp 225 230 235 240 Gly Asp Ala Lys Pro Trp Cys His Val Leu Lys Asn Arg Arg Leu Thr 245 250 255 Trp Glu Tyr Cys Asp Val Pro Ser Cys Ser Thr Cys Gly Leu Arg Gln 260 265 270 Tyr Ser Gln Pro Gln Phe Arg Ile Lys Gly Gly Leu Phe Ala Asp Ile 275 280 285 Ala Ser His Pro Trp Gln Ala Ala Ile Phe Ala Lys His Arg Arg Ser 290 295 300 Pro Gly Glu Arg Phe Leu Cys Gly Gly Ile Leu Ile Ser Ser Cys Trp 305 310 315 320 Ile Leu Ser Ala Ala His Cys Phe Gln Glu Arg Phe Pro Pro His His 325 330 335 Leu Thr Val Ile Leu Gly Arg Thr Tyr Arg Val Val Pro Gly Glu Glu 340 345 350 Glu Gln Lys Phe Glu Val Glu Lys Tyr Ile Val His Lys Glu Phe Asp 355 360 365 Asp Asp Thr Tyr Asp Asn Asp Ile Ala Leu Leu Gln Leu Lys Ser Asp 370 375 380 Ser Ser Arg Cys Ala Gln Glu Ser Ser Val Val Arg Thr Val Cys Leu 385 390 395 400 Pro Pro Ala Asp Leu Gln Leu Pro Asp Trp Thr Glu Cys Glu Leu Ser 405 410 415 Gly Tyr Gly Lys His Glu Ala Leu Ser Pro Phe Tyr Ser Glu Arg Leu 420 425 430 Lys Glu Ala His Val Arg Leu Tyr Pro Ser Ser Arg Cys Thr Ser Gln 435 440 445 His Leu Leu Asn Arg Thr Val Thr Asp Asn Met Leu Cys Ala Gly Asp 450 455 460 Thr Arg Ser Gly Gly Pro Gln Ala Asn Leu His Asp Ala Cys Gln Gly 465 470 475 480 Asp Ser Gly Gly Pro Leu Val Cys Leu Asn Asp Gly Arg Met Thr Leu 485 490 495 Val Gly Ile Ile Ser Trp Gly Leu Gly Cys Gly Gln Lys Asp Val Pro 500 505 510 Gly Val Tyr Thr Lys Val Thr Asn Tyr Leu Asp Trp Ile Arg Asp Asn 515 520 525 Met Arg Pro 530 126531PRTArtificial SequenceFUSION ROTEIN - N_EGF_TPA EGF k1 DEL 126Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly Gln Glu Ile

His Ala Arg Phe Arg Arg Gly 115 120 125 Ala Arg Ser Tyr Gln Val Ile Cys Arg Asp Glu Lys Thr Gln Met Ile 130 135 140 Tyr Gln Gln His Gln Ser Trp Leu Arg Pro Val Leu Arg Ser Asn Arg 145 150 155 160 Val Glu Tyr Cys Trp Cys Asn Ser Gly Arg Ala Gln Cys His Ser Val 165 170 175 Pro Val Lys Ser Asn Ser Asp Cys Tyr Phe Gly Asn Gly Ser Ala Tyr 180 185 190 Arg Gly Thr His Ser Leu Thr Glu Ser Gly Ala Ser Cys Leu Pro Trp 195 200 205 Asn Ser Met Ile Leu Ile Gly Lys Val Tyr Thr Ala Gln Asn Pro Ser 210 215 220 Ala Gln Ala Leu Gly Leu Gly Lys His Asn Tyr Cys Arg Asn Pro Asp 225 230 235 240 Gly Asp Ala Lys Pro Trp Cys His Val Leu Lys Asn Arg Arg Leu Thr 245 250 255 Trp Glu Tyr Cys Asp Val Pro Ser Cys Ser Thr Cys Gly Leu Arg Gln 260 265 270 Tyr Ser Gln Pro Gln Phe Arg Ile Lys Gly Gly Leu Phe Ala Asp Ile 275 280 285 Ala Ser His Pro Trp Gln Ala Ala Ile Phe Ala Lys His Arg Arg Ser 290 295 300 Pro Gly Glu Arg Phe Leu Cys Gly Gly Ile Leu Ile Ser Ser Cys Trp 305 310 315 320 Ile Leu Ser Ala Ala His Cys Phe Gln Glu Arg Phe Pro Pro His His 325 330 335 Leu Thr Val Ile Leu Gly Arg Thr Tyr Arg Val Val Pro Gly Glu Glu 340 345 350 Glu Gln Lys Phe Glu Val Glu Lys Tyr Ile Val His Lys Glu Phe Asp 355 360 365 Asp Asp Thr Tyr Asp Asn Asp Ile Ala Leu Leu Gln Leu Lys Ser Asp 370 375 380 Ser Ser Arg Cys Ala Gln Glu Ser Ser Val Val Arg Thr Val Cys Leu 385 390 395 400 Pro Pro Ala Asp Leu Gln Leu Pro Asp Trp Thr Glu Cys Glu Leu Ser 405 410 415 Gly Tyr Gly Lys His Glu Ala Leu Ser Pro Phe Tyr Ser Glu Arg Leu 420 425 430 Lys Glu Ala His Val Arg Leu Tyr Pro Ser Ser Arg Cys Thr Ser Gln 435 440 445 His Leu Leu Asn Arg Thr Val Thr Asp Asn Met Leu Cys Ala Gly Asp 450 455 460 Thr Arg Ser Gly Gly Pro Gln Ala Asn Leu His Asp Ala Cys Gln Gly 465 470 475 480 Asp Ser Gly Gly Pro Leu Val Cys Leu Asn Asp Gly Arg Met Thr Leu 485 490 495 Val Gly Ile Ile Ser Trp Gly Leu Gly Cys Gly Gln Lys Asp Val Pro 500 505 510 Gly Val Tyr Thr Lys Val Thr Asn Tyr Leu Asp Trp Ile Arg Asp Asn 515 520 525 Met Arg Pro 530 127531PRTArtificial SequenceFUSION PROTEIN - TPA _EGF egf AND K1 DEL 127Gln Glu Ile His Ala Arg Phe Arg Arg Gly Ala Arg Ser Tyr Gln Val 1 5 10 15 Ile Cys Arg Asp Glu Lys Thr Gln Met Ile Tyr Gln Gln His Gln Ser 20 25 30 Trp Leu Arg Pro Val Leu Arg Ser Asn Arg Val Glu Tyr Cys Trp Cys 35 40 45 Asn Ser Gly Arg Ala Gln Cys His Ser Val Pro Val Lys Ser Asn Ser 50 55 60 Asp Cys Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly Thr His Ser Leu 65 70 75 80 Thr Glu Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser Met Ile Leu Ile 85 90 95 Gly Lys Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln Ala Leu Gly Leu 100 105 110 Gly Lys His Asn Tyr Cys Arg Asn Pro Asp Gly Asp Ala Lys Pro Trp 115 120 125 Cys His Val Leu Lys Asn Arg Arg Leu Thr Trp Glu Tyr Cys Asp Val 130 135 140 Pro Ser Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser Gln Pro Gln Phe 145 150 155 160 Arg Ile Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser His Pro Trp Gln 165 170 175 Ala Ala Ile Phe Ala Lys His Arg Arg Ser Pro Gly Glu Arg Phe Leu 180 185 190 Cys Gly Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu Ser Ala Ala His 195 200 205 Cys Phe Gln Glu Arg Phe Pro Pro His His Leu Thr Val Ile Leu Gly 210 215 220 Arg Thr Tyr Arg Val Val Pro Gly Glu Glu Glu Gln Lys Phe Glu Val 225 230 235 240 Glu Lys Tyr Ile Val His Lys Glu Phe Asp Asp Asp Thr Tyr Asp Asn 245 250 255 Asp Ile Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser Arg Cys Ala Gln 260 265 270 Glu Ser Ser Val Val Arg Thr Val Cys Leu Pro Pro Ala Asp Leu Gln 275 280 285 Leu Pro Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr Gly Lys His Glu 290 295 300 Ala Leu Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu Ala His Val Arg 305 310 315 320 Leu Tyr Pro Ser Ser Arg Cys Thr Ser Gln His Leu Leu Asn Arg Thr 325 330 335 Val Thr Asp Asn Met Leu Cys Ala Gly Asp Thr Arg Ser Gly Gly Pro 340 345 350 Gln Ala Asn Leu His Asp Ala Cys Gln Gly Asp Ser Gly Gly Pro Leu 355 360 365 Val Cys Leu Asn Asp Gly Arg Met Thr Leu Val Gly Ile Ile Ser Trp 370 375 380 Gly Leu Gly Cys Gly Gln Lys Asp Val Pro Gly Val Tyr Thr Lys Val 385 390 395 400 Thr Asn Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg Pro Val Asp Pro 405 410 415 Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu Asn Gln Thr 420 425 430 Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile Pro His Glu 435 440 445 Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys Pro Ala Asp 450 455 460 Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu Gly Tyr Ile 465 470 475 480 Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys Glu Asn Gly 485 490 495 Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr Phe Glu Cys 500 505 510 Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly Thr Asp Cys 515 520 525 Asp Ser Gly 530 128539PRTArtificial SequencetPA variant 128Gln Glu Ile His Ala Arg Phe Arg Arg Gly Ala Arg Ser Tyr Gln Val 1 5 10 15 Ile Cys Arg Asp Glu Lys Thr Gln Met Ile Tyr Gln Gln His Gln Ser 20 25 30 Trp Leu Arg Pro Val Leu Arg Ser Asn Arg Val Glu Tyr Cys Trp Cys 35 40 45 Asn Ser Gly Arg Ala Gln Cys His Ser Val Pro Val Lys Ser Cys Ser 50 55 60 Glu Pro Arg Cys Phe Asn Gly Gly Thr Cys Gln Gln Ala Leu Tyr Phe 65 70 75 80 Ser Asp Phe Val Cys Gln Cys Pro Glu Gly Phe Ala Gly Lys Cys Cys 85 90 95 Glu Ile Asp Thr Arg Ala Thr Cys Tyr Glu Asp Gln Gly Ile Ser Tyr 100 105 110 Arg Gly Asn Trp Ser Thr Ala Glu Ser Gly Ala Glu Cys Thr Asn Trp 115 120 125 Gln Ser Ser Ala Leu Ala Gln Lys Pro Tyr Ser Gly Arg Arg Pro Asp 130 135 140 Ala Ile Arg Leu Gly Leu Gly Asn His Asn Tyr Cys Arg Asn Pro Asp 145 150 155 160 Arg Asp Ser Lys Pro Trp Cys Tyr Val Phe Lys Ala Gly Lys Tyr Ser 165 170 175 Ser Glu Phe Cys Ser Thr Pro Ala Cys Ser Glu Gly Asn Ser Asp Cys 180 185 190 Tyr Phe Gly Asn Gly Ser Ala Tyr Arg Gly Thr His Ser Leu Thr Glu 195 200 205 Ser Gly Ala Ser Cys Leu Pro Trp Asn Ser Met Ile Leu Ile Gly Lys 210 215 220 Val Tyr Thr Ala Gln Asn Pro Ser Ala Gln Ala Leu Gly Leu Gly Lys 225 230 235 240 His Asn Tyr Cys Arg Asn Pro Asp Gly Asp Ala Lys Pro Trp Cys His 245 250 255 Val Leu Lys Asn Arg Arg Leu Thr Trp Glu Tyr Cys Asp Val Pro Ser 260 265 270 Cys Ser Thr Cys Gly Leu Arg Gln Tyr Ser Gln Pro Gln Phe Arg Ile 275 280 285 Lys Gly Gly Leu Phe Ala Asp Ile Ala Ser His Pro Trp Gln Ala Ala 290 295 300 Ile Phe Ala Lys His Arg Arg Ser Pro Gly Glu Arg Phe Leu Cys Gly 305 310 315 320 Gly Ile Leu Ile Ser Ser Cys Trp Ile Leu Ser Ala Ala His Cys Phe 325 330 335 Gln Glu Arg Phe Pro Pro His His Leu Thr Val Ile Leu Gly Arg Thr 340 345 350 Tyr Arg Val Val Pro Gly Glu Glu Glu Gln Lys Phe Glu Val Glu Lys 355 360 365 Tyr Ile Val His Lys Glu Phe Asp Asp Asp Thr Tyr Asp Asn Asp Ile 370 375 380 Ala Leu Leu Gln Leu Lys Ser Asp Ser Ser Arg Cys Ala Gln Glu Ser 385 390 395 400 Ser Val Val Arg Thr Val Cys Leu Pro Pro Ala Asp Leu Gln Leu Pro 405 410 415 Asp Trp Thr Glu Cys Glu Leu Ser Gly Tyr Gly Lys His Glu Ala Leu 420 425 430 Ser Pro Phe Tyr Ser Glu Arg Leu Lys Glu Ala His Val Arg Leu Tyr 435 440 445 Pro Ser Ser Arg Cys Thr Ser Gln His Leu Leu Asn Arg Thr Val Thr 450 455 460 Asp Asn Met Leu Cys Ala Gly Asp Thr Arg Ser Gly Gly Pro Gln Ala 465 470 475 480 Asn Leu His Asp Ala Cys Gln Gly Asp Ser Gly Gly Pro Leu Val Cys 485 490 495 Leu Asn Asp Gly Arg Met Thr Leu Val Gly Ile Ile Ser Trp Gly Leu 500 505 510 Gly Cys Gly Gln Lys Asp Val Pro Gly Val Tyr Thr Lys Val Thr Asn 515 520 525 Tyr Leu Asp Trp Ile Arg Asp Asn Met Arg Pro 530 535 129532PRTArtificial SequenceInterdomain SK_EGFpolypeptide where EGF fused between beta and gamma domain of SK 129Ile Ala Gly Pro Glu Trp Leu Leu Asp Arg Pro Ser Val Asn Asn Ser 1 5 10 15 Gln Leu Val Val Ser Val Ala Gly Thr Val Glu Gly Thr Asn Gln Asp 20 25 30 Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr Ser Arg Pro Ala His 35 40 45 Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys Ser Lys Pro Phe Ala 50 55 60 Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu Lys Ala Asp Leu Leu 65 70 75 80 Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val His Ser Asn Asp Asp 85 90 95 Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala Thr Ile Thr Asp Arg 100 105 110 Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly Ser Val Thr Leu Pro 115 120 125 Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly His Val Arg Val Arg 130 135 140 Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala Lys Ser Val Asp Val 145 150 155 160 Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro Asp Asp Asp Phe Arg 165 170 175 Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr Leu Ala Ile Gly Asp 180 185 190 Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala Gln Ser Ile Leu Asn 195 200 205 Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg Asp Ser Ser Ile Val 210 215 220 Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu Pro Met Asp Gln Glu 225 230 235 240 Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala Tyr Arg Ile Asn Lys 245 250 255 Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr Asp Leu Ile Ser Glu 260 265 270 Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro Tyr Asp Pro Phe Asp 275 280 285 Arg Ser His Leu Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln 290 295 300 Cys Gln Pro Leu Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly 305 310 315 320 Phe Ala Pro Ile Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn 325 330 335 Gln Thr Ala Cys Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys 340 345 350 Glu Cys Pro Glu Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp 355 360 365 Ile Asp Glu Cys Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn 370 375 380 Leu Pro Gly Thr Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala 385 390 395 400 Arg His Ile Gly Thr Asp Cys Asp Ser Gly Lys Leu Phe Thr Ile Lys 405 410 415 Tyr Val Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu 420 425 430 Thr Ala Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg 435 440 445 Asp Lys Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met 450 455 460 Asp Tyr Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn 465 470 475 480 Arg Ile Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala 485 490 495 Ser Tyr His Leu Ala Tyr Asp Lys Asp Arg Tyr Thr Glu Glu Glu Arg 500 505 510 Glu Val Tyr Ser Tyr Leu Arg Tyr Thr Gly Thr Pro Ile Pro Asp Asn 515 520 525 Pro Asn Asp Lys 530 130136PRTStaphylococcus aureus 130Ser Ser Ser Phe Asp Lys Gly Lys Tyr Lys Lys Gly Asp Asp Ala Ser 1 5 10 15 Tyr Phe Glu Pro Thr Gly Pro Tyr Leu Met Val Asn Val Thr Gly Val 20 25 30 Asp Ser Lys Gly Asn Glu Leu Leu Ser Pro His Tyr Val Glu Phe Pro 35 40 45 Ile Lys Pro Gly Thr Thr Leu Thr Lys Glu Lys Ile Glu Tyr Tyr Val 50 55 60 Glu Trp Ala Leu Asp Ala Thr Ala Tyr Lys Glu Phe Arg Val Val Glu 65 70 75 80 Leu Asp Pro Ser Ala Lys Ile Glu Val Thr Tyr Tyr Asp Lys Asn Lys 85 90 95 Lys Lys Glu Glu Thr Lys Ser Phe Pro Ile Thr Glu Lys Gly Phe Val 100 105 110 Val Pro Asp Leu Ser Glu His Ile Lys Asn Pro Gly Phe Asn Leu Ile 115 120 125 Thr Lys Val Val Ile Glu Lys Lys 130 135 1311800DNAArtificial SequenceEGF 4,5,6 fused with truncated SK at both terminus by overlap extension 131gtggacccgt gcttcagagc caactgcgag taccagtgcc agcccctgaa ccaaactagc 60tacctctgcg tctgcgccga gggcttcgcg cccattcccc acgagccgca caggtgccag 120atgttttgca accagactgc ctgtccagcc gactgcgacc ccaacaccca ggctagctgt 180gagtgccctg aaggctacat cctggacgac ggtttcatct gcacggacat cgacgagtgc 240gaaaacggcg gcttctgctc cggggtgtgc cacaacctcc ccggtacctt cgagtgcatc 300tgcgggcccg actcggccct tgcccgccac attggcaccg actgtgacag ccaattagtt 360gttagcgttg ctggtactgt tgaggggacg aatcaagaca ttagtcttaa attttttgaa 420atcgatctaa catcacgacc tgctcatgga ggaaagacag agcaaggctt aagtccaaaa 480tcaaaaccat ttgctactga tagtggcgcg atgtcacata aacttgagaa agctgactta 540ctaaaggcta ttcaagaaca attgatcgct aacgtccaca gtaacgacga ctactttgag 600gtcattgatt ttgcaagcga tgcaaccatt actgatcgaa acggcaaggt ctactttgct 660gacaaagatg gttcggtaac cttgccgacc

caacctgtcc aagaattttt gctaagcgga 720catgtgcgcg ttagaccata taaagaaaaa ccaatacaaa accaagcgaa atctgttgat 780gtggaatata ctgtacagtt tactccctta aaccctgatg acgatttcag accaggtctc 840aaagatacta agctattgaa aacactagct atcggtgaca ccatcacatc tcaagaatta 900ctagctcaag cacaaagcat tttaaacaaa aaccacccag gctatacgat ttatgaacgt 960gactcctcaa tcgtcactca tgacaatgac attttccgta cgattttacc aatggatcaa 1020gagtttactt accgtgttaa aaatcgggaa caagcttata ggatcaataa aaaatctggt 1080ctgaatgaag aaataaacaa cactgacctg atctctgaga aatattacgt ccttaaaaaa 1140ggggaaaagc cgtatgatcc ctttgatcgc agtcacttga aactgttcac catcaaatac 1200gttgatgtcg ataccaacga attgctaaaa agtgagcagc tcttaacagc tagcgaacgt 1260aacttagact tcagagattt atacgatcct cgtgataagg ctaaactact ctacaacaat 1320ctcgatgctt ttggtattat ggactatacc ttaactggaa aagtagagga taatcacgat 1380gacaccaacc gtatcataac cgtttatatg ggcaagcgac ccgaaggaga gaatgctagc 1440tatcatttag ccgtggaccc gtgcttcaga gccaactgcg agtaccagtg ccagcccctg 1500aaccaaacta gctacctctg cgtctgcgcc gagggcttcg cgcccattcc ccacgagccg 1560cacaggtgcc agatgttttg caaccagact gcctgtccag ccgactgcga ccccaacacc 1620caggctagct gtgagtgccc tgaaggctac atcctggacg acggtttcat ctgcacggac 1680atcgacgagt gcgaaaacgg cggcttctgc tccggggtgt gccacaacct ccccggtacc 1740ttcgagtgca tctgcgggcc cgactcggcc cttgcccgcc acattggcac cgactgtgac 1800132600PRTArtificial SequenceFusion sequence 132Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gln Leu Val Val Ser Val Ala Gly Thr Val Glu 115 120 125 Gly Thr Asn Gln Asp Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr 130 135 140 Ser Arg Pro Ala His Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys 145 150 155 160 Ser Lys Pro Phe Ala Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu 165 170 175 Lys Ala Asp Leu Leu Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val 180 185 190 His Ser Asn Asp Asp Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala 195 200 205 Thr Ile Thr Asp Arg Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly 210 215 220 Ser Val Thr Leu Pro Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly 225 230 235 240 His Val Arg Val Arg Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala 245 250 255 Lys Ser Val Asp Val Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro 260 265 270 Asp Asp Asp Phe Arg Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr 275 280 285 Leu Ala Ile Gly Asp Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala 290 295 300 Gln Ser Ile Leu Asn Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg 305 310 315 320 Asp Ser Ser Ile Val Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu 325 330 335 Pro Met Asp Gln Glu Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala 340 345 350 Tyr Arg Ile Asn Lys Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr 355 360 365 Asp Leu Ile Ser Glu Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro 370 375 380 Tyr Asp Pro Phe Asp Arg Ser His Leu Lys Leu Phe Thr Ile Lys Tyr 385 390 395 400 Val Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu Thr 405 410 415 Ala Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg Asp 420 425 430 Lys Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met Asp 435 440 445 Tyr Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn Arg 450 455 460 Ile Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala Ser 465 470 475 480 Tyr His Leu Ala Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln 485 490 495 Cys Gln Pro Leu Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly 500 505 510 Phe Ala Pro Ile Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn 515 520 525 Gln Thr Ala Cys Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys 530 535 540 Glu Cys Pro Glu Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp 545 550 555 560 Ile Asp Glu Cys Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn 565 570 575 Leu Pro Gly Thr Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala 580 585 590 Arg His Ile Gly Thr Asp Cys Asp 595 600 1331452DNAArtificial SequenceEGF 4,5,6 with N-terminal truncated SK. 133gtggacccgt gcttcagagc caactgcgag taccagtgcc agcccctgaa ccaaactagc 60tacctctgcg tctgcgccga gggcttcgcg cccattcccc acgagccgca caggtgccag 120atgttttgca accagactgc ctgtccagcc gactgcgacc ccaacaccca ggctagctgt 180gagtgccctg aaggctacat cctggacgac ggtttcatct gcacggacat cgacgagtgc 240gaaaacggcg gcttctgctc cggggtgtgc cacaacctcc ccggtacctt cgagtgcatc 300tgcgggcccg actcggccct tgcccgccac attggcaccg actgtgacag ccaattagtt 360gttagcgttg ctggtactgt tgaggggacg aatcaagaca ttagtcttaa attttttgaa 420atcgatctaa catcacgacc tgctcatgga ggaaagacag agcaaggctt aagtccaaaa 480tcaaaaccat ttgctactga tagtggcgcg atgtcacata aacttgagaa agctgactta 540ctaaaggcta ttcaagaaca attgatcgct aacgtccaca gtaacgacga ctactttgag 600gtcattgatt ttgcaagcga tgcaaccatt actgatcgaa acggcaaggt ctactttgct 660gacaaagatg gttcggtaac cttgccgacc caacctgtcc aagaattttt gctaagcgga 720catgtgcgcg ttagaccata taaagaaaaa ccaatacaaa accaagcgaa atctgttgat 780gtggaatata ctgtacagtt tactccctta aaccctgatg acgatttcag accaggtctc 840aaagatacta agctattgaa aacactagct atcggtgaca ccatcacatc tcaagaatta 900ctagctcaag cacaaagcat tttaaacaaa aaccacccag gctatacgat ttatgaacgt 960gactcctcaa tcgtcactca tgacaatgac attttccgta cgattttacc aatggatcaa 1020gagtttactt accgtgttaa aaatcgggaa caagcttata ggatcaataa aaaatctggt 1080ctgaatgaag aaataaacaa cactgacctg atctctgaga aatattacgt ccttaaaaaa 1140ggggaaaagc cgtatgatcc ctttgatcgc agtcacttga aactgttcac catcaaatac 1200gttgatgtcg ataccaacga attgctaaaa agtgagcagc tcttaacagc tagcgaacgt 1260aacttagact tcagagattt atacgatcct cgtgataagg ctaaactact ctacaacaat 1320ctcgatgctt ttggtattat ggactatacc ttaactggaa aagtagagga taatcacgat 1380gacaccaacc gtatcataac cgtttatatg ggcaagcgac ccgaaggaga gaatgctagc 1440tatcatttag cc 1452134484PRTArtificial SequenceEGF 4,5,6 fused with N-terminal truncated SK. 134Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gln Leu Val Val Ser Val Ala Gly Thr Val Glu 115 120 125 Gly Thr Asn Gln Asp Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr 130 135 140 Ser Arg Pro Ala His Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys 145 150 155 160 Ser Lys Pro Phe Ala Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu 165 170 175 Lys Ala Asp Leu Leu Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val 180 185 190 His Ser Asn Asp Asp Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala 195 200 205 Thr Ile Thr Asp Arg Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly 210 215 220 Ser Val Thr Leu Pro Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly 225 230 235 240 His Val Arg Val Arg Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala 245 250 255 Lys Ser Val Asp Val Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro 260 265 270 Asp Asp Asp Phe Arg Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr 275 280 285 Leu Ala Ile Gly Asp Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala 290 295 300 Gln Ser Ile Leu Asn Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg 305 310 315 320 Asp Ser Ser Ile Val Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu 325 330 335 Pro Met Asp Gln Glu Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala 340 345 350 Tyr Arg Ile Asn Lys Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr 355 360 365 Asp Leu Ile Ser Glu Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro 370 375 380 Tyr Asp Pro Phe Asp Arg Ser His Leu Lys Leu Phe Thr Ile Lys Tyr 385 390 395 400 Val Asp Val Asp Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu Thr 405 410 415 Ala Ser Glu Arg Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg Asp 420 425 430 Lys Ala Lys Leu Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met Asp 435 440 445 Tyr Thr Leu Thr Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn Arg 450 455 460 Ile Ile Thr Val Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala Ser 465 470 475 480 Tyr His Leu Ala 1351452DNAArtificial SequenceSK (16-383) EGF 4,5,6 135agccaattag ttgttagcgt tgctggtact gttgagggga cgaatcaaga cattagtctt 60aaattttttg aaatcgatct aacatcacga cctgctcatg gaggaaagac agagcaaggc 120ttaagtccaa aatcaaaacc atttgctact gatagtggcg cgatgtcaca taaacttgag 180aaagctgact tactaaaggc tattcaagaa caattgatcg ctaacgtcca cagtaacgac 240gactactttg aggtcattga ttttgcaagc gatgcaacca ttactgatcg aaacggcaag 300gtctactttg ctgacaaaga tggttcggta accttgccga cccaacctgt ccaagaattt 360ttgctaagcg gacatgtgcg cgttagacca tataaagaaa aaccaataca aaaccaagcg 420aaatctgttg atgtggaata tactgtacag tttactccct taaaccctga tgacgatttc 480agaccaggtc tcaaagatac taagctattg aaaacactag ctatcggtga caccatcaca 540tctcaagaat tactagctca agcacaaagc attttaaaca aaaaccaccc aggctatacg 600atttatgaac gtgactcctc aatcgtcact catgacaatg acattttccg tacgatttta 660ccaatggatc aagagtttac ttaccgtgtt aaaaatcggg aacaagctta taggatcaat 720aaaaaatctg gtctgaatga agaaataaac aacactgacc tgatctctga gaaatattac 780gtccttaaaa aaggggaaaa gccgtatgat ccctttgatc gcagtcactt gaaactgttc 840accatcaaat acgttgatgt cgataccaac gaattgctaa aaagtgagca gctcttaaca 900gctagcgaac gtaacttaga cttcagagat ttatacgatc ctcgtgataa ggctaaacta 960ctctacaaca atctcgatgc ttttggtatt atggactata ccttaactgg aaaagtagag 1020gataatcacg atgacaccaa ccgtatcata accgtttata tgggcaagcg acccgaagga 1080gagaatgcta gctatcattt agccgtggac ccgtgcttca gagccaactg cgagtaccag 1140tgccagcccc tgaaccaaac tagctacctc tgcgtctgcg ccgagggctt cgcgcccatt 1200ccccacgagc cgcacaggtg ccagatgttt tgcaaccaga ctgcctgtcc agccgactgc 1260gaccccaaca cccaggctag ctgtgagtgc cctgaaggct acatcctgga cgacggtttc 1320atctgcacgg acatcgacga gtgcgaaaac ggcggcttct gctccggggt gtgccacaac 1380ctccccggta ccttcgagtg catctgcggg cccgactcgg cccttgcccg ccacattggc 1440accgactgtg ac 1452136484PRTArtificial SequenceSK (16-383) EGF 4,5,6 136Ser Gln Leu Val Val Ser Val Ala Gly Thr Val Glu Gly Thr Asn Gln 1 5 10 15 Asp Ile Ser Leu Lys Phe Phe Glu Ile Asp Leu Thr Ser Arg Pro Ala 20 25 30 His Gly Gly Lys Thr Glu Gln Gly Leu Ser Pro Lys Ser Lys Pro Phe 35 40 45 Ala Thr Asp Ser Gly Ala Met Ser His Lys Leu Glu Lys Ala Asp Leu 50 55 60 Leu Lys Ala Ile Gln Glu Gln Leu Ile Ala Asn Val His Ser Asn Asp 65 70 75 80 Asp Tyr Phe Glu Val Ile Asp Phe Ala Ser Asp Ala Thr Ile Thr Asp 85 90 95 Arg Asn Gly Lys Val Tyr Phe Ala Asp Lys Asp Gly Ser Val Thr Leu 100 105 110 Pro Thr Gln Pro Val Gln Glu Phe Leu Leu Ser Gly His Val Arg Val 115 120 125 Arg Pro Tyr Lys Glu Lys Pro Ile Gln Asn Gln Ala Lys Ser Val Asp 130 135 140 Val Glu Tyr Thr Val Gln Phe Thr Pro Leu Asn Pro Asp Asp Asp Phe 145 150 155 160 Arg Pro Gly Leu Lys Asp Thr Lys Leu Leu Lys Thr Leu Ala Ile Gly 165 170 175 Asp Thr Ile Thr Ser Gln Glu Leu Leu Ala Gln Ala Gln Ser Ile Leu 180 185 190 Asn Lys Asn His Pro Gly Tyr Thr Ile Tyr Glu Arg Asp Ser Ser Ile 195 200 205 Val Thr His Asp Asn Asp Ile Phe Arg Thr Ile Leu Pro Met Asp Gln 210 215 220 Glu Phe Thr Tyr Arg Val Lys Asn Arg Glu Gln Ala Tyr Arg Ile Asn 225 230 235 240 Lys Lys Ser Gly Leu Asn Glu Glu Ile Asn Asn Thr Asp Leu Ile Ser 245 250 255 Glu Lys Tyr Tyr Val Leu Lys Lys Gly Glu Lys Pro Tyr Asp Pro Phe 260 265 270 Asp Arg Ser His Leu Lys Leu Phe Thr Ile Lys Tyr Val Asp Val Asp 275 280 285 Thr Asn Glu Leu Leu Lys Ser Glu Gln Leu Leu Thr Ala Ser Glu Arg 290 295 300 Asn Leu Asp Phe Arg Asp Leu Tyr Asp Pro Arg Asp Lys Ala Lys Leu 305 310 315 320 Leu Tyr Asn Asn Leu Asp Ala Phe Gly Ile Met Asp Tyr Thr Leu Thr 325 330 335 Gly Lys Val Glu Asp Asn His Asp Asp Thr Asn Arg Ile Ile Thr Val 340 345 350 Tyr Met Gly Lys Arg Pro Glu Gly Glu Asn Ala Ser Tyr His Leu Ala 355 360 365 Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 370 375 380 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 385 390 395 400 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 405 410 415 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 420 425 430 Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 435 440 445 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 450 455 460 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 465 470 475 480 Thr Asp Cys Asp 137118PRTArtificial SequenceArtificially synthesized 137Val Asp Pro Cys Phe Arg Ala Asn Cys Glu Tyr Gln Cys Gln Pro Leu 1 5 10 15 Asn Gln Thr Ser Tyr Leu Cys Val Cys Ala Glu Gly Phe Ala Pro Ile 20 25 30 Pro His Glu Pro His Arg Cys Gln Met Phe Cys Asn Gln Thr Ala Cys 35 40 45 Pro Ala Asp Cys Asp Pro Asn Thr Gln Ala Ser Cys Glu Cys Pro Glu 50 55 60

Gly Tyr Ile Leu Asp Asp Gly Phe Ile Cys Thr Asp Ile Asp Glu Cys 65 70 75 80 Glu Asn Gly Gly Phe Cys Ser Gly Val Cys His Asn Leu Pro Gly Thr 85 90 95 Phe Glu Cys Ile Cys Gly Pro Asp Ser Ala Leu Ala Arg His Ile Gly 100 105 110 Thr Asp Cys Asp Ser Gly 115