title: A novel carbonyl reductase from Pichia stipitis for the production of ethyl (S)-4-chloro-3-hydroxybutanoate.
abstract: An NADPH-dependent carbonyl reductase (PsCR) gene from Pichia stipitis was cloned. It contains an open reading frame of 849 bp encoding 283 amino acids whose sequence had less than 60% identity to known reductases that produce ethyl (S)-4-chloro-3-hydroxybutanoates (S-CHBE). When expressed in Escherichia coli, the recombinant PsCR exhibited an activity of 27 U/mg using ethyl 4-chloro-3-oxobutanoate (COBE) as a substrate. Reduction of COBE to (S)-CHBE by transformants in an aqueous mono-phase system for 18 h, gave a molar yield of 94% and an optical purity of the (S)-isomer of more than 99% enantiomeric excess.
authors.affiliation: State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing University of Technology, Nanjing 210009, China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Ye
authors.forename: Ming
authors.initials: M
authors.lastname: Yan
authors.forename: Lin
authors.initials: L
authors.lastname: Xu
authors.forename: Hou
authors.initials: H
authors.lastname: Cao
authors.forename: Zhenjiang
authors.initials: Z
authors.lastname: Li
authors.forename: Yong
authors.initials: Y
authors.lastname: Chen
authors.forename: Shuya
authors.initials: S
authors.lastname: Li
authors.forename: Hanjie
authors.initials: H
authors.lastname: Ying
mesh_terms: D000090:Acetoacetates / Q000378:metabolism; D000429:Alcohol Oxidoreductases / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism*; D000595:Amino Acid Sequence; D002087:Butyrates / Q000378:metabolism*; D003001:Cloning, Molecular; D004926:Escherichia coli / Q000235:genetics; D005656:Fungal Proteins / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism*; D015870:Gene Expression; D007700:Kinetics; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D010084:Oxidation-Reduction; D010843:Pichia / Q000201:enzymology* / Q000235:genetics; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
chemical_list: D000090:Acetoacetates; D002087:Butyrates; D005656:Fungal Proteins; C121244:ethyl 4-chloro-3-hydroxybutanoate; C111982:ethyl 4-chloro-3-oxobutanoate; D000429:Alcohol Oxidoreductases