3s9a
From Proteopedia
Russell's viper venom serine proteinase, RVV-V (closed-form)
Structural highlights
FunctionVSPG_DABSI Venom serine protease that selectively activates factor V (F5) in a calcium-independent manner. It cleaves the Arg(1545)-Ser(1546) linkage in the human factor V molecule. Induces the coagulation of mammalian plasma.[1] Publication Abstract from PubMedRussell's viper venom factor V (FV) activator (RVV-V) is a thrombin-like proteinase that specifically cleaves the Arg1545-Ser1546 bond of FV. Here we present the crystal structure of RVV-V in complex with the FV14 peptide (residues 1533-1546 of human FV) determined at 1.8A resolution. The structure reveals multiple interactions between RVV-V and the seven residues, Ile1539 (P(7))-Arg1545 (P(1)), of the cleaved substrate. Comparison with substrate-free structures reveals conformational changes of the RVV-V loops upon substrate binding, suggesting that the multiple interactions are mediated by an induced-fit mechanism. The results provide an explanation for the narrow specificity of RVV-V. Structural basis of coagulation factor V recognition for cleavage by RVV-V.,Nakayama D, Ben Ammar Y, Miyata T, Takeda S FEBS Lett. 2011 Aug 23. PMID:21871889[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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