LOCUS SCX3_BUTOC 64 aa linear INV 16-OCT-2001 DEFINITION Neurotoxin III. ACCESSION P01485 PID g134354 VERSION P01485 GI:134354 DBSOURCE swissprot: locus SCX3_BUTOC, accession P01485; class: standard. created: Jul 21, 1986. sequence updated: Jul 21, 1986. annotation updated: Oct 16, 2001. xrefs: gi: gi: 69530 xrefs (non-sequence databases): HSSP P01484, InterPro IPR003614, InterPro IPR002061, InterPro IPR001219, Pfam PF00537, PRINTS PR00284, ProDom PD000908, SMART SM00505 KEYWORDS Neurotoxin; Sodium channel inhibitor; Amidation. SOURCE Tunisian scorpion. ORGANISM Buthus occitanus tunetanus Eukaryota; Metazoa; Arthropoda; Chelicerata; Arachnida; Scorpiones; Buthoidea; Buthidae; Buthus. REFERENCE 1 (residues 1 to 64) AUTHORS Vargas,O., Gregoire,J., Martin,M.-F., Bechis,G. and Rochat,H. TITLE Neurotoxins from the venoms of two scorpions: Buthus occitanus tunetanus and Buthus occitanus mardochei JOURNAL Toxicon 20, 79-79 (1982) REMARK SEQUENCE. COMMENT [FUNCTION] BINDS TO SODIUM CHANNELS AND INHIBITS THE INACTIVATION OF THE ACTIVATED CHANNELS, THEREBY BLOCKING NEURONAL TRANSMISSION. [SUBCELLULAR LOCATION] SECRETED. [SIMILARITY] BELONGS TO THE ALPHA/BETA-SCORPION TOXIN FAMILY. ALPHA-TOXIN SUBFAMILY. FEATURES Location/Qualifiers source 1..64 /organism="Buthus occitanus tunetanus" /db_xref="taxon:6871" Protein 1..64 /product="Neurotoxin III" Bond bond(12,63) /bond_type="disulfide" /note="BY SIMILARITY." Bond bond(16,36) /bond_type="disulfide" /note="BY SIMILARITY." Bond bond(22,46) /bond_type="disulfide" /note="BY SIMILARITY." Bond bond(26,48) /bond_type="disulfide" /note="BY SIMILARITY." Site 64 /site_type="amidation" ORIGIN 1 vkdgyivddr nctyfcgrna ycneectklk gesgycqwas pygnacycyk vpdhvrtkgp 61 grcn //