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© Research
Publication : The protein journal

CCSV-MPase, a novel procoagulant metalloproteinase from Cerastes cerastes venom: purification, biochemical characterization and protein identification

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in The protein journal - 01 Oct 2010

Chérifi F, Rousselle JC, Namane A, Laraba-Djebari F

Link to Pubmed [PMID] – 20717713

Protein J. 2010 Oct;29(7):466-74

A procoagulant metalloproteinase called CCSV-MPase was purified from C. cerastes venom by successive chromatographic methods starting with gel-filtration through Sephadex G-75; ion-exchange DEAE-Cellulose A-50; affinity chromatography on Benzamidine Sepharose 6B and RP-HPLC on a C8 column. CCSV-MPase has been isolated to an extent of about tenfolds and its molecular mass was evaluated at 70 kDa by SDS-PAGE. CCSV-MPase hydrolyzes casein and fibrinogene as natural substrates. Its proteolytic activity was inhibited by EDTA and 1.10-phenanthroline, a chelators of bivalent cation metals and Zn(2+) respectively. CCSV-MPase is therefore a Zn(2+)-metalloproteinase with fibrinogenolytic but not hemorrhagic activity. It greatly decreased levels of plasmatic fibrinogen when administered to rats for 24 h. This fibrinogenase hydrolyzes the Bβ chain of human fibrinogen in vitro releasing fibrinopeptide B only. LC MS/MS analysis of tryptic fragments of CCSV-MPase demonstrated that it showed some sequence similarities with four other venom metalloproteinases. CCSV-MPase could be considered as a potential therapeutic agent as it is a non-hemorrhagic enzyme and could be useful in thrombotic diseases because of its defibrinogenation of blood.

http://www.ncbi.nlm.nih.gov/pubmed/20717713