期刊
BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY
卷 70, 期 12, 页码 3077-3080出版社
TAYLOR & FRANCIS LTD
DOI: 10.1271/bbb.60408
关键词
earthworm; biocatalyst; keto ester; stereoselective reduction; cell-free extract
We found the reducing activity toward carbonyl compounds in the cell-free extract of the earthworm, Lumbricus rubellus. The earthworm extract had a reducing activity for keto esters in the presence of NADH or NADPH as a coenzyme. The earthworm extract reduced ethyl 3-methyl-2-oxobutanoate to the corresponding alcohol with a high enantiomeric excess (91%, R-form) at 50 degrees C in the presence of NADH. In particular, ethyl 2-oxoheptanoate was exclusively reduced to the corresponding (R)-hydroxyl ester with a high enantiomeric excess (> 99%).
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