Snake venom zinc protease that inhibits the classical and alternative pathways of complement by cleaving factor B, C6, C7, and C8. Also slowly and selectively degrades alpha-chain of fibrinogen (FGA), and shows edema-inducing activity. Binds 1 zinc ion per subunit. Inhibited by EDTA, EGTA, 1,10-phenanthroline and DTT. Not inhibited by PMSF and SBTI. Monomer. Expressed by the venom gland. Does not degrade beta- and gamma-chains of fibrinogen. Does not hydrolyze fibrin, azocasein and BAEE. Does not show hemorrhagic activity (PubMed:20837040). Belongs to the venom metalloproteinase (M12B) family. P-III subfamily. P-IIIa sub-subfamily.