title: Complete amino acid sequence of a new type of lethal neurotoxin from the venom of the funnel-web spider Atrax robustus.
abstract: Robustoxin, the lethal neurotoxin isolated from the venom of the male Sydney funnel-web spider, Atrax robustus, is of unique structural type and physiological mode of action. The primary structure of this 42-residue peptide was determined to be H2N-Cys-Ala-Lys-Lys-Arg-Asn-Trp-Cys-Gly-Lys-Asn-Glu-Asp-Cys-Cys-Cys-Pro- Met-Lys-Cys-Ile-Tyr-Ala-Trp-Tyr-Asn-Gln-Gln-Gly-Ser-Cys-Gln-Thr-Thr-Ile- Thr-Gly-Leu-Phe-Lys-Lys-Cys-H. The disposition of disulphide-bridged cysteine residues at both the amino- and carboxy-termini and as a triplet at residues 14-16 appears to have no precedent amongst neurotoxins.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001180:Arthropod Venoms / Q000032:analysis*; D008297:Male; D013111:Spider Venoms / Q000032:analysis*
chemical_list: D001180:Arthropod Venoms; D013111:Spider Venoms; C044536:robustoxin