UniProt functional annotation for D2YW39

UniProt code: D2YW39.

Organism: Calloselasma rhodostoma (Malayan pit viper) (Agkistrodon rhodostoma).
Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Lepidosauria; Squamata; Bifurcata; Unidentata; Episquamata; Toxicofera; Serpentes; Colubroidea; Viperidae; Crotalinae; Calloselasma.
 
Function: Potent inhibitor of collagen-induced platelet aggregation. It acts by binding to the integrin alpha2A domain and blocks collagen binding to integrin alpha-2/beta-1 (ITGA2/ITGB1). The gamma/delta subunits mainly contribute to this activity. {ECO:0000269|PubMed:11121411, ECO:0000269|PubMed:12871211}.
 
Subunit: Heterotetramer of subunit alpha, beta, gamma and delta; only the gamma and the delta subunits are disulfide-linked. Alpha-beta heterodimer and gamma-delta heterodimer associate orthogonally, giving a cruciform conformation (PubMed:19369383). This heterotetramer may covalently dimerizes thanks to the gamma subunit (PubMed:11121411). {ECO:0000269|PubMed:11121411, ECO:0000269|PubMed:19369383}.
Subcellular location: Secreted.
Tissue specificity: Expressed by the venom gland.
Similarity: Belongs to the snaclec family. {ECO:0000305}.

Annotations taken from UniProtKB at the EBI.