γ-GLUTAMYL PEPTIDES OF VIGNA RADIATA SEEDS

Article abstract of DOI:10.1016/0031-9422(86)88023-2

It has been reported elsewerw that Vigna radiata seeds contain a high concentration of γ-glutamyl-S-methylcysteine and its sulphoxide and that these compounds serve as index compounds for the chemotaxonomy of V. radiata.Beside these two γ-glutamyl peptides, nine other γ-glutamyl derivatives, of which three are new compounds, have been isolated and identified from V. radiata seeds.The structures of the new peptides, γ-glutamyl-S-methylcysteinyl-β-alanine (S-methylhomoglutathione), γ-glutamyl-N^δ-acetylornithine and γ-glutamyl-γ-glutamyl-S-methylcysteine, were confirmed by direct comparison with synthetic specimens.The other six γ-glutamyl derivatives were homoglutathione, γ-glutamyl glutamic acid, -aspartic acid, -phenylalanine, -leucine and -isoleucine.Key Word Index- Vigna radiata; Leguminosae; seeds; γ-glutamyl peptides; γ-glutamyl-S-methylcystenyl-β-alanine (S-methylhomoglutathione); γ-glutamyl-N^δ-acetylornithine; γ-glutamyl-γ-glutamyl-S-methylcysteine; homoglutathione; γ-glutamyl derivatives.