Alpha-conotoxin PeIA

UniProtKB accession:  Q1L777

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. This synthetic peptide potently and reversibly blocks alpha-9-alpha-10/CHRNA9-CHRNA10 nAChR (IC(50)=6.9-54.9 nM), alpha-3-beta-2/CHRNA3-CHRNB2 (IC(50)=9.7-97.5 nM) and alpha-6/alpha-3-beta-2-beta-3 (CHRNA6/CHRNA3-CHRNB2-CHRNB3) (IC(50)=11.1-17.2 nM) (PubMed:15983035, PubMed:21252227, PubMed:22914547, PubMed:23846688, PubMed:32101438). It also inhibits alpha-6/alpha-3-beta-4 (CHRNA6/CHRNA3-CHRNB4) nAChR with a higher potency on human (IC(50)=6.75 nM) than on rat receptors (IC(50)=130-147 nM) (PubMed:22914547, PubMed:33523678). Also shows a weak ability to inhibit alpha-3-beta-4/CHRNA3-CHRNB4 (IC(50)=480-1500 nM) (PubMed:15983035, PubMed:22914547). This synthetic toxin also inhibits N-type calcium channels (Ca2.2/CACNA1B) (IC(50)=1.1 nM) via the activation of the G protein-coupled GABA(B) receptor in DRG neurons (PubMed:21252227). Also exhibits inhibition of D.melanogaster alpha-7/CHRNA7 nAChRs (PubMed:25466886).