Structural highlights
Function
VSPG_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 PubMed
Russell'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 Also
References
- ↑ Tokunaga F, Nagasawa K, Tamura S, Miyata T, Iwanaga S, Kisiel W. The factor V-activating enzyme (RVV-V) from Russell's viper venom. Identification of isoproteins RVV-V alpha, -V beta, and -V gamma and their complete amino acid sequences. J Biol Chem. 1988 Nov 25;263(33):17471-81. PMID:3053712
- ↑ Nakayama D, Ben Ammar Y, Miyata T, Takeda S. Structural basis of coagulation factor V recognition for cleavage by RVV-V. FEBS Lett. 2011 Aug 23. PMID:21871889 doi:10.1016/j.febslet.2011.08.022
