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Botulinum toxin A is one of the most toxic substances known to man. It is constituted by a heavy chain which carries the receptor binding and membrane translocation domain, and a light chain, a metalloprotease responsible for the inhibition of neurotransmitter release and paralysis by the specific cleavage of SNAP-25, part of the exocytosis complex. Based on this protease activity, using quenched...
A novel, basic pro-coagulation metalloprotease (Russell's viper basic coagulant metalloprotease, RVBCMP) with an approximate molecular weight of 15kDa was purified from the venom of Daboia russelli russelli (Russell's viper) from eastern India. RVBCMP exerted dose-dependent coagulation of platelet-poor human plasma; however, RVBCMP possessed less coagulant activity as compared with the coagulant activity...
Bothropasin is a 48kDa hemorrhagic PIII snake venom metalloprotease (SVMP) isolated from Bothrops jararaca, containing disintegrin/cysteine-rich adhesive domains. Here we present the crystal structure of bothropasin complexed with the inhibitor POL647. The catalytic domain consists of a scaffold of two subdomains organized similarly to those described for other SVMPs, including the zinc and calcium-binding...
Snake venom metalloproteases encompass a large family of toxins, with approximately 200 members already catalogued, which exhibit a diversity of structures and biological functions. From this relatively large number, only a dozen examples of apoptosis-inducing metalloproteases, like VAP1 and 2 from the venom of Crotalus atrox, are known. Since most VAP1-like toxins ever characterized were purified...
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