title: Introduction of DPR, an enterostatin fragment peptide, into soybean beta-conglycinin alpha' subunit by site-directed mutagenesis.
abstract: DPR, a fragment peptide of enterostatin (VPDPR) having hypocholesterolemic activity, was introduced into the three homologous sites, EPR, DYR, and DPI, in the soybean beta-conglycinin alpha' subunit by site-directed mutagenesis. The modified beta-conglycinin was expressed in Escherichia coli and recovered in the soluble fraction. After purification on ion-exchange HPLC, the modified beta-conglycinin was digested by trypsin to release integrated DPR. The yield of DPR from 1 mole of the modified beta-conglycinin was 1.2 mole.
authors.affiliation: Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Takenaka
authors.forename: Naomi
authors.initials: N
authors.lastname: Doyama
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Maruyama
authors.forename: Shigeru
authors.initials: S
authors.lastname: Utsumi
authors.forename: Masaaki
authors.initials: M
authors.lastname: Yoshikawa
mesh_terms: D000595:Amino Acid Sequence; D052179:Antigens, Plant; D002851:Chromatography, High Pressure Liquid; D004926:Escherichia coli / Q000235:genetics; D005916:Globulins / Q000235:genetics* / Q000378:metabolism; D008969:Molecular Sequence Data; D016297:Mutagenesis, Site-Directed; D009842:Oligopeptides / Q000737:chemistry*; D010446:Peptide Fragments / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D021122:Protein Subunits; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D055314:Seed Storage Proteins; D030262:Soybean Proteins / Q000235:genetics* / Q000378:metabolism; D013025:Glycine max / Q000737:chemistry*; D014357:Trypsin / Q000378:metabolism
chemical_list: D052179:Antigens, Plant; D005916:Globulins; D009842:Oligopeptides; D010446:Peptide Fragments; D021122:Protein Subunits; D011994:Recombinant Proteins; D055314:Seed Storage Proteins; D030262:Soybean Proteins; C013894:beta-conglycinin protein, Glycine max; C107385:valyl-prolyl-aspartyl-prolyl-arginine; D014357:Trypsin