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Soluble and microsomal glutatione S-transferase activities in pea seedlings (Pisum sativum L.) by H. Diesperger; H. Sandermann is a Agricultural and Biological Sciences article available to read on EtoBox.

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Epicotyl and primary leaves of pea seedlings (Pisum sativum L., var. Alaska) were found to contain soluble and microsomal enzymes catalyzing the addition of glutathione to the olefinic double bond of cinnamic acid. Glutathione S-cinnamoyl transfer was also obtained with enzyme preparations from potato slices and cell suspension cultures of parsley and soybean.The pea transferases had pH-optima between pH 7.4 and 7.8 Km-values were 0.1-0.4 mM and 1-4 mM for cinnamic acid and glutathione, respectively. V-values were between 2-15 nmol mg(-1) protein x min.Chromatography on Sephacryl S-200 indicated that the soluble pea glutathione S-cinnamoyl transferase activity existed in molecular weight forms of 37,000, 75,000, and 150,000. The glutathione-dependent cleavage of the herbicide fluorodifen was catalyzed by a different soluble enzyme activity which eluted in molecular weight positions of 47,000 and/or 82,000.The microsomal fraction from pea primary leaves also catalyzed the conjugation of the carcinogen benzo[α]pyrene with glutathione.

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Author

H. Diesperger; H. Sandermann

Publisher

Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0032-0935)

Published

1979

Language

EN

Field

Agricultural and Biological Sciences (Life Sciences)