oldenlandia affinis/protease

Cyclization of the peptide backbone by connecting the N- and C-terminus can endow target peptides with favorable properties, such as increased stability or potential oral bioavailability. However, there are few tools available for carrying out this modification. Asparaginyl endopeptidases (AEPs) are

OBJECTIVE Oldenlandia diffusa (Bai Hua She She Cao) is one of the herbs most commonly used in traditional Chinese medicine for treating cancer. Various studies using the herb alone or in combination with other therapy plans have evidenced the effectiveness of the herb in the management of cancers of

A common structural motif consisting of a cystine knot and a small triple-stranded beta-sheet has been defined from comparison of the 3-dimensional structures of the polypeptides omega-conotoxin GVIA (Conus geographus), kalata BI (Oldenlandia affinis DC), and CMTI-I (Curcurbita maxima). These 3

OBJECTIVE To study the effect of Oldenlandia diffusa (OD) on lymphocytes and tumor cells in vitro. METHODS Effects of OD extract (ODE) on proliferation of spleen cells of mice and the phagocytosis of monocytes to tumor cells using 3H incorporation were analysed, and effect on specific activity of

Cyclotides are diverse plant backbone cyclized peptides that have attracted interest as pharmaceutical scaffolds, but fundamentals of their biosynthetic origin remain elusive. Backbone cyclization is a key enzyme-mediated step of cyclotide biosynthesis and confers a measure of stability on the

Chemical and bio-conjugation techniques have been developed rapidly in recent years and allow the building of protein polymers. However, a controlled protein polymerization process is always a challenge. Here, we have developed an enzymatic methodology for constructing polymerized protein step by

Transpeptidation reactions result in the formation of new peptide bonds and this can occur between two separate peptides or within the one peptide. These reactions are catalyzed by enzymes and when the N- and C-terminus of the one peptide are joined it results in the formation of cyclic proteins.

Breaking and forming peptidyl bonds are fundamental biochemical reactions in protein chemistry. Unlike proteases that are abundantly available, fast-acting ligases are rare. OaAEP1 is an enzyme isolated from the cyclotide-producing plant oldenlandia affinis that displayed weak peptide cyclase

The recent development of chemical and bio-conjugation techniques allows for the engineering of various protein polymers. However, most of the polymerization process is difficult to control. To meet this challenge, we develop an enzymatic procedure to build polyprotein using the combination of a

Cyclization via head-to-tail linkage of the termini of a peptide chain occurs in only a small percentage of proteins, but engenders the resultant cyclic proteins with exceptional stability. The mechanisms involved are poorly understood and this review attempts to summarize what is known of the