Daboia russelii siamensis snake venom metalloproteinase (SVMP) (SVMP)

Daboia russelii siamensis snake venom metalloproteinases (SVMPs) are a major class of zinc-dependent enzymes found in the venom of the Eastern Russell's Viper (UniProt: P86540). These enzymes are primarily responsible for the severe local and systemic hemorrhage and tissue necrosis characteristic of envenomation (PubMed: 26003026). SVMPs function by proteolytically degrading the basement membrane and extracellular matrix of blood vessels, leading to vascular leakage and internal bleeding (PubMed: 30145355). Additionally, certain SVMPs in this species act as procoagulants by activating Factor X or prothrombin, contributing to life-threatening consumption coagulopathy (PubMed: 28235563). Therapeutically, these proteins are the primary targets of antivenoms, which use polyclonal antibodies to neutralize their toxic effects (WHO: Snake Antivenoms). Research is also focused on small-molecule inhibitors like batimastat, which competitively bind the zinc atom in the enzyme's active site to prevent tissue damage (PubMed: 29111116). These inhibitors are being explored as potential field-stable treatments to be administered immediately after a bite to mitigate permanent physical disability.

Other names

Russell's viper venom metalloproteinaseRVV-MPHemorrhagic toxinZinc-dependent metalloproteinaseDaboia russelii siamensis SVMP

Neutralization of toxic enzymatic activity through antibody-mediated binding (antivenom) or competitive inhibition of the zinc-dependent catalytic site (PubMed: 29111116).