ID CXA12_CONCB Reviewed; 68 AA. AC P0C1W0; DT 19-SEP-2006, integrated into UniProtKB/Swiss-Prot. DT 19-SEP-2006, sequence version 1. DT 24-JUL-2007, entry version 6. DE Alpha-conotoxin Ca1.2 precursor. OS Conus caracteristicus (Characteristic cone). OC Eukaryota; Metazoa; Mollusca; Gastropoda; Orthogastropoda; OC Apogastropoda; Caenogastropoda; Sorbeoconcha; Hypsogastropoda; OC Neogastropoda; Conoidea; Conidae; Conus. OX NCBI_TaxID=89440; RN [1] RP NUCLEOTIDE SEQUENCE [MRNA]. RC TISSUE=Venom duct; RX PubMed=14701840; DOI=10.1074/jbc.M309654200; RA Santos A.D., McIntosh J.M., Hillyard D.R., Cruz L.J., Olivera B.M.; RT "The A-superfamily of conotoxins: structural and functional RT divergence."; RL J. Biol. Chem. 279:17596-17606(2004). CC -!- FUNCTION: Alpha-conotoxins act on postsynaptic membranes, they CC bind to the nicotinic acetylcholine receptors (nAChR) and thus CC inhibit them (By similarity). CC -!- SUBCELLULAR LOCATION: Secreted (By similarity). CC -!- TISSUE SPECIFICITY: Expressed by the venom duct. CC -!- SIMILARITY: Belongs to the conotoxin A superfamily. Alpha-type CC family. CC --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR InterPro; IPR013007; Alpha_conotoxin. DR InterPro; IPR009958; Toxin_8. DR Pfam; PF07365; Toxin_8; 1. DR PROSITE; PS60014; ALPHA_CONOTOXIN; FALSE_NEG. PE 2: Evidence at transcript level; KW Acetylcholine receptor inhibitor; Amidation; Neurotoxin; KW Postsynaptic neurotoxin; Secreted; Signal; Sulfation; Toxin. FT SIGNAL 1 21 Potential. FT PROPEP 22 48 By similarity. FT /FTId=PRO_0000249785. FT PEPTIDE 49 64 Alpha-conotoxin Ca1.2. FT /FTId=PRO_0000249786. FT PROPEP 65 68 By similarity. FT /FTId=PRO_0000249787. FT MOD_RES 63 63 Sulfotyrosine (By similarity). FT MOD_RES 64 64 Cysteine amide (G-65 provides amide FT group) (By similarity). FT DISULFID 50 56 By similarity. FT DISULFID 51 64 By similarity. SQ SEQUENCE 68 AA; 7326 MW; 618E8912BC5BE7AF CRC64; MGMRMMFTVF LLVVLATTVV SFTSDRASEG RNAAAKDKAS DLVALTVRGC CAIRECRLQN AAYCGGIY //