title: Amino acid sequence of a lectin from Japanese frog (Rana japonica) eggs.
abstract: The complete amino acid sequence and the location of disulfide bonds of a lectin from Japanese frog (Rana japonica) eggs, which specifically agglutinates transformed cells, are presented. The sequence was determined by analysis of peptides generated by digestion of the S-carboxyamidomethylated protein with Achromobacter protease I, or chymotrypsin, and by chemical cleavage with BNPS-skatole or cyanogen bromide. The lectin is a single-chain protein consisting of 111 residues, with a pyroglutamyl residue at the amino terminus. Four disulfide bonds link half-cystinyl residue 19 to 72, 34 to 82, 52 to 97, and 94 to 111. The sequence and the location of the disulfide bonds are highly homologous to those of bull frog (Rana catesbeiana) egg S-lectin. They are also homologous to human angiogenin, a tumor angiogenesis factor, and a family of pancreatic ribonucleases.
authors.affiliation: Division of Biomedical Polymer Science, Fujita Health University, Aichi.
authors.forename: Y
authors.initials: Y
authors.lastname: Kamiya
authors.forename: F
authors.initials: F
authors.lastname: Oyama
authors.forename: R
authors.initials: R
authors.lastname: Oyama
authors.forename: F
authors.initials: F
authors.lastname: Sakakibara
authors.forename: K
authors.initials: K
authors.lastname: Nitta
authors.forename: H
authors.initials: H
authors.lastname: Kawauchi
authors.forename: Y
authors.initials: Y
authors.lastname: Takayanagi
authors.forename: K
authors.initials: K
authors.lastname: Titani
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002918:Chymotrypsin; D003488:Cyanogen Bromide; D004220:Disulfides / Q000737:chemistry; D004229:Dithiothreitol; D037102:Lectins / Q000737:chemistry*; D008969:Molecular Sequence Data; D010063:Ovum / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry / Q000302:isolation & purification; D011892:Rana catesbeiana; D011898:Ranidae; D012260:Ribonucleases; D012697:Serine Endopeptidases
chemical_list: D004220:Disulfides; D037102:Lectins; D010455:Peptides; D012260:Ribonucleases; D012697:Serine Endopeptidases; D002918:Chymotrypsin; C036813:lysyl endopeptidase; D003488:Cyanogen Bromide; D004229:Dithiothreitol