Alpha-conotoxin VxXXB

UniProtKB accession:  P0C1W6

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Alpha-conotoxins act on postsynaptic membranes, they bind to the nicotinic acetylcholine receptors (nAChR) and thus inhibit them. Through its two C-terminal domains, this homodimeric protein would bind to two nAChR allosteric sites, located outside the nAChR C-loop of the principal binding face and at the adjacent binding interface in a clockwise direction (PubMed:37124228). It specifically blocks mammalian neuronal nAChR of the alpha-7/CHRNA7 (IC(50)=0.4 nM), alpha-3-beta-2/CHRNA3-CHRNB2 (IC(50)=8.4 nM) and alpha-4-beta-2/CHRNA4-CHRNB2 (IC(50)=228 nM) subtypes (PubMed:16790424). It inhibits alpha-7/CHRNA7, alpha-3-beta-2/CHRNA3-CHRNB2 and alpha-4-beta-2/CHRNA4-CHRNB2 nAChR subtypes more efficiently than VxXXA and VxXXC (PubMed:16790424).