Phospholipase A2 crotoxin basic subunit CBd

UniProtKB accession:  C0HM14

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Heterodimer CA-CB: Crotoxin is a potent presynaptic neurotoxin that possesses phospholipase A2 (PLA2) activity and exerts a lethal action by blocking neuromuscular transmission (PubMed:8513799). It consists of a non-covalent association of a basic and weakly toxic PLA2 subunit (CBa2, CBb, CBc, or CBd), with a small acidic, non-enzymatic and non-toxic subunit (CA1, CA2, CA3 or CA4) (PubMed:8513799). The complex acts by binding to a specific 48-kDa protein (R48) receptor located on presynaptic membranes, forming a transient ternary complex CA-CB-R48, followed by dissociation of the CA-CB complex and release of the CA subunit (PubMed:12657321). At equilibrium, only the CB subunits remain associated with the specific crotoxin receptor (PubMed:12657321). In addition to neurotoxicity, crotoxin has been found to exert myotoxicity, nephrotoxicity, and cardiovascular toxicity (By similarity). Moreover, anti-inflammatory, immunomodulatory, anti-tumor and analgesic effects of crotoxin have also been reported (By similarity).