title: Residue size at position 87 of cytochrome P450 BM-3 determines its stereoselectivity in propylbenzene and 3-chlorostyrene oxidation.
abstract: We report here oxidation of propylbenzene and 3-chlorostyrene by wild-type cytochrome P450 BM-3 with high turnover (479 nmol 1-phenyl-1-propanol/min/nmol P450 and 300 nmol 3-chlorostyrene oxide/min/nmol P450). Furthermore, the residue size at position 87 of P450 BM-3 was found to play critical roles in determining stereoselectivity in oxidation of propylbenzene and 3-chlorostyrene. Replacement of Phe87 with Val, Ala and Gly resulted in decreases in optical purity of produced (R)-(+)-1-phenyl-1-propanol from 90.0 to 37.4, 26.0 and -15.6% e.e., respectively, and in increases in those of produced (R)-(+)-3-chlorostyrene oxide from -61.0 to -38.0, 67.0 and 94.6% e.e., respectively.
authors.affiliation: Division of Applied Life Science, Graduate School of Agriculture, Kyoto University, Japan.
authors.forename: Q S
authors.initials: QS
authors.lastname: Li
authors.forename: J
authors.initials: J
authors.lastname: Ogawa
authors.forename: R D
authors.initials: RD
authors.lastname: Schmid
authors.forename: S
authors.initials: S
authors.lastname: Shimizu
mesh_terms: D000595:Amino Acid Sequence; D019943:Amino Acid Substitution; D001410:Bacillus megaterium / Q000201:enzymology* / Q000235:genetics; D001426:Bacterial Proteins; D001555:Benzene Derivatives / Q000737:chemistry* / Q000378:metabolism*; D003577:Cytochrome P-450 Enzyme System / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D008401:Gas Chromatography-Mass Spectrometry; D006900:Hydroxylation; D006899:Mixed Function Oxygenases / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D009154:Mutation; D009251:NADPH-Ferrihemoprotein Reductase; D010084:Oxidation-Reduction; D013237:Stereoisomerism; D013329:Structure-Activity Relationship; D020058:Styrene / Q000737:chemistry* / Q000378:metabolism*; D013379:Substrate Specificity
chemical_list: D001426:Bacterial Proteins; D001555:Benzene Derivatives; C024268:n-propylbenzene; D020058:Styrene; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D009251:NADPH-Ferrihemoprotein Reductase; C052423:flavocytochrome P450 BM3 monoxygenases