Introduction of DPR, an enterostatin fragment peptide, into soybean beta-conglycinin alpha' subunit by site-directed mutagenesis |
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Authors: | Takenaka Yasuyuki Doyama Naomi Maruyama Nobuyuki Utsumi Shigeru Yoshikawa Masaaki |
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Institution: | Division of Food Science and Biotechnology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan. |
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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. |
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