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Production of S-(+)-2-phenylpropionic acid from (R,S)-2-phenylpropionitrile by the combination of nitrile hydratase and stereoselective amidase in Rhodococcus equi TG328 by Thomas Gilligan; Hideaki Yamada; Toru Nagasawa is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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A new soil isolate, tentatively identified as Rhodococcus equi TG328, was found to be effective in the production of S-( + )-2-phenylpropionic acid from (R,S)-2-phenylpropionitrile. The conversion is catalysed by two enzymes. First, a nitrile hydratase converts the (R,S)-nitrile to (R,S)-2-phenylpropionamide. Second, a stereoselective amidase converts the S-( + )amide to S-( + )-2-phenylpropionic acid. Conditions for optimal enzyme production and accumulation of S-(+)-2-phenylpropionic acid by resting cells were studied. The reaction of resting cells for 30 h at 10 ° C with (R,S)-2-phenylpropionitrile resulted in the production of 100 g of S-(+)-2-phenylpropionic acid per litre of reaction mixture. The enantiometric excess of the purified S-(+)-2-phenylpropionic acid was 99.4%. The amount of S-(+)-2-phenylpropionic acid accumulated was enhanced by lower reaction temperatures. In addition, unreacted R-(-)-2-phenylpropionamide with 99.0% enantiometric excess was isolated.

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Author

Thomas Gilligan; Hideaki Yamada; Toru Nagasawa

Publisher

Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 1432-0614)

Published

1993

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)