title: The amino-acid sequence of copper/zinc superoxide dismutase from swordfish liver. Comparison of copper/zinc superoxide dismutase sequences.
abstract: The amino acid sequence of copper/zinc superoxide dismutase from swordfish (Xiphias gladius) liver has been determined by alignment of the tryptic peptides according to the known sequence of bovine erythrocyte copper/zinc superoxide dismutase. This alignment has resulted in the ligands to the copper (His-47, 49, 76 and 94) and the zinc (His-76, 85, 134 and Asp-97) being conserved in all the copper/zinc superoxide dismutases sequenced so far. Also conserved in the sequences are the cysteines forming the intrachain disulphide bridge (Cys-58 and 160) and the essential arginine (Arg-157). Comparison of the amino acid sequence of swordfish liver copper/zinc superoxide dismutase with the bovine, human, horse, yeast and Photobacterium leiognathi indicates that the swordfish enzyme has a high homology with the other eukaryotic enzymes. Low homology is, however, observed with the P. leiognathi enzyme.
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D055598:Chemical Phenomena; D002621:Chemistry; D002918:Chymotrypsin; D003300:Copper; D005399:Fishes; D008099:Liver / Q000201:enzymology*; D013045:Species Specificity; D013482:Superoxide Dismutase / Q000302:isolation & purification; D014357:Trypsin; D015032:Zinc
chemical_list: C030389:bacteriocuprein; D003300:Copper; D013482:Superoxide Dismutase; D002918:Chymotrypsin; D014357:Trypsin; D015032:Zinc