title: Amino acid sequence of winged bean (Psophocarpus tetragonolobus (L.) DC.) chymotrypsin inhibitor, WCI-3.
abstract: The complete amino acid sequence of winged bean chymotrypsin inhibitor 3 (WCI-3) was determined by the conventional methods. WCI-3 consisted of 183 amino acid residues, but was heterogeneous in the carboxyl terminal region owing to the loss of one to four carboxyl terminal amino acid residues. The sequence of WCI-3 was highly homologous with those of soybean trypsin inhibitor Tia, winged bean trypsin inhibitor WTI-1, and Erythrina latissima trypsin inhibitor DE-3. One of the reactive site peptide bonds of WCI-3 was identified as Leu(65)-Ser(66), which was located at the same position as those of the other Kunitz-family leguminous proteinase inhibitors.
authors.affiliation: Department of Chemistry, Osaka University College of Science.
authors.forename: H
authors.initials: H
authors.lastname: Shibata
authors.forename: S
authors.initials: S
authors.lastname: Hara
authors.forename: T
authors.initials: T
authors.lastname: Ikenaka
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D002918:Chymotrypsin / Q000037:antagonists & inhibitors*; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000032:analysis; D010940:Plant Proteins; D011480:Protease Inhibitors; D012639:Seeds / Q000032:analysis*; D014361:Trypsin Inhibitors / Q000032:analysis*
chemical_list: D010446:Peptide Fragments; D010940:Plant Proteins; D011480:Protease Inhibitors; D014361:Trypsin Inhibitors; C440588:WCI protein, Psophocarpus tetragonolobus; D002918:Chymotrypsin