Carbonyl reductase, gene thereof and method of using the same

Chemistry: molecular biology and microbiology – Enzyme – proenzyme; compositions thereof; process for... – Oxidoreductase

Reexamination Certificate

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Details

C435S220000, C435S156000, C435S069100, C435S252200, C536S023200

Reexamination Certificate

active

10528000

ABSTRACT:
The present invention provides a novel polypeptide efficiently forming (R)-N-benzyl-3-pyrrolidinol, a polynucleotide coding for said polypeptide, and use of the same.The present invention relates to a polypeptide having the following physical and chemical properties (1) to (4):(1) activity: acting on N-benzyl-3-pyrrolidinone with NADH or NADPH as a coenzyme, to form (R)-N-benzyl-3-pyrrolidinol;(2) optimum pH for activity: 5.5 to 6.0;(3) optimum temperature for activity: 50° C. to 55° C.;(4) molecular weight: about 55,000 as determined by gel filtration analysis, about 28,000 as determined by SDS polyacrylamide gel electrophoresis analysis.The present invention also relates to a polypeptide comprising the amino acid sequence shown under SEQ ID NO:1 in the sequence listing, a polynucleotide coding for said polypeptide, and a transformant producing said polypeptide at high levels.

REFERENCES:
patent: 2004/0235124 (2004-11-01), Kawano et al.
patent: 4-218384 (1992-08-01), None
patent: 6-141876 (1994-05-01), None
patent: 654534 (1995-05-01), None
patent: 8-89261 (1996-04-01), None
patent: 10-150997 (1998-06-01), None
patent: 11-215995 (1999-08-01), None
patent: 03-31636 (2003-04-01), None
Li, Zhi, et al., “Preparation of optically activeN-benzyl-3-hydroxypyrrolidine by enzymatic hydroxylation,”Tetrahedron: Asymmetry, 10 (1999) 1323-1333.

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