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14 Αποτελέσματα
The Erythrina protease inhibitor: interactions with tissue plasminogen activator.
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Σύνδεση εγγραφή
The Kunitz-type trypsin and tissue plasminogen activator (t-PA)-inhibitor from Erythrina caffra seeds was cleaved by trypsin at low pH to yield a disulphide linked two-chain molecule with reduced hydrophobicity. This change was used to separate cleaved from native inhibitor by phenyl-Sepharose
Prenylisoflavonoids from Erythrina senegalensis as novel HIV-1 protease inhibitors.
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Σύνδεση εγγραφή
Eight compounds were isolated from the CH (2)Cl (2) extracts of ERYTHRINA SENEGALENSIS to assess HIV-1 protease (PR) activity inhibition. The prenylated isoflavone structures, identified by spectroscopic analysis, were 8-prenylluteone ( 1), auriculatin ( 2), erysenegalensein O ( 3), erysenegalensein
Assessing sub-Saharan Erythrina for efficacy: traditional uses, biological activities and phytochemistry.
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The genus Erythrina comprises more than 100 species, widely distributed in tropical and subtropical areas. In Africa, 31 wild species and 14 cultivated species have been described. In sub-Saharan Africa, Erythrina species are used to treat frequent parasitic and microbial diseases, inflammation,
The complete amino acid sequence of trypsin inhibitor DE-3 from Erythrina latissima seeds.
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Trypsin inhibitor DE-3 from Erythrina latissima seeds contains 172 amino acids, including 4 half-cystine residues, and resembles the Kunitz-type inhibitors. Limited hydrolysis of DE-3 with trypsin at pH 3 produced two fragments, F1 and F2, containing 63 and 109 amino acids, respectively.
Sugar competition assays reveal high affinity receptors for Erythrina cristigalli lectin on feline monocytes.
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An examination of fluorescein-labelled Erythrina cristigalli lectin (FITC-ECL) staining on feline mononuclear cells (MNC) using fluorescent microscopy and a novel sugar titration competition assay revealed that monocytes (MO) were stained brighter by FITC-ECL than were lymphocytes (LYM). When MNC
The amino acid sequence of Erythrina corallodendron lectin and its homology with other legume lectins.
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The primary sequence of Erythrina corallodendron lectin was deduced from analysis of the peptides derived from the lectin by digestion with trypsin, chymotrypsin, Staphylococcus aureus V8 protease, elastase and lysylendopeptidase-C, and of fragments generated by cleavage of the lectin with dilute
The spectroscopic analysis, inhibition and binding studies demonstrate the equivalence of Erythrina caffra trypsin inhibitor and the recombinant substitution variant recSerETI.
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A recombinant substitution mutant (recSerETI) of the Erythrina caffra trypsin inhibitor, with the N-terminal valine residue substituted by serine, was produced in E. coli and compared to the wildtype protein (wtETI) with respect to physicochemical and functional properties. The spectral properties,
Contribution of conserved Asn residues to the inhibitory activities of Kunitz-type protease inhibitors from plants.
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Plant Kunitz-type protease inhibitors contain a conserved Asn residue in the N-terminal region. To investigate the role of Asn residue in protease inhibitory activities, Erythrina variegata trypsin inhibitor a (ETIa), E. variegata chymotrypsin inhibitor (ECI), and their mutants, ETIa-N12A and
Secretion of active kringle-2-serine protease in Escherichia coli.
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Active human tissue plasminogen activator variant kringle-2-serine protease (K2 + SP domains; referred to as MB1004) was synthesized as a secreted protein in Escherichia coli, isolated, and characterized. MB1004 is a relatively large and complex protein, approximately 38 kDa in size and containing
Role of remote scaffolding residues in the inhibitory loop pre-organization, flexibility, rigidification and enzyme inhibition of serine protease inhibitors.
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Canonical serine protease inhibitors interact with cognate enzymes through the P3-P2' region of the inhibitory loop while its scaffold hardly makes any contact. Neighboring scaffolding residues like Arginines or Asparagine shape-up the inhibitory loop and favor the resynthesis of cleaved scissile
Purification and characterization of cathepsin D from normal human breast tissue.
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The lysosomal aspartyl protease cathepsin D is present in most mammalian cells and is active in the catabolism of intracellular and endocytosed proteins. It appears to be overexpressed and abnormally secreted in breast cancer cells, and may contribute to the process of tumor metastasis. In the
Single mutation at P1 of a chymotrypsin inhibitor changes it to a trypsin inhibitor: X-ray structural (2.15 A) and biochemical basis.
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Change in specificity, caused by the mutations at P1 site, of the serine protease inhibitors of different families is reported in the literature, but Kunitz (STI) family inhibitors are almost unexplored in this regard. In this paper, we present the crystal structure of a P1 variant of winged bean
Structure of a Kunitz-type chymotrypsin from winged bean seeds at 2.95 A resolution.
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Thc crystal structure of an alpha-chymotrypsin inhibitor (P6(1)22; a = 61.4, c = 210.9 A) isolated from winged bean (Psophocarpus. tetragonolobus) seeds has been determined at 2.95 A resolution by the molecular-replacement method using the 2.6 A coordinates of Erythrina trypsin inhibitor (ETI) as
Role of P225 and the C136-C201 disulfide bond in tissue plasminogen activator.
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The protease domain of tissue plasminogen activator (tPA), a key fibrinolytic enzyme, was expressed in Escherichia coli with a yield of 1 mg per liter of media. The recombinant protein was titrated with the Erythrina caraffa trypsin inhibitor (ETI) and characterized in its interaction with
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