title: cis-chlorobenzene dihydrodiol dehydrogenase (TcbB) from Pseudomonas sp. strain P51, expressed in Escherichia coli DH5alpha(pTCB149), catalyzes enantioselective dehydrogenase reactions.
abstract: cis-Chlorobenzene dihydrodiol dehydrogenase (CDD) from Pseudomonas sp. strain P51, cloned into Escherichia coli DH5alpha(pTCB149) was able to oxidize cis-dihydrodihydroxy derivatives (cis-dihydrodiols) of dihydronaphthalene, indene, and four para-substituted toluenes to the corresponding catechols. During the incubation of a nonracemic mixture of cis-1,2-indandiol, only the (+)-cis-(1R,2S) enantiomer was oxidized; the (-)-cis-(S,2R) enantiomer remained unchanged. CDD oxidized both enantiomers of cis-1,2-dihydroxy-1,2,3, 4-tetrahydronaphthalene, but oxidation of the (+)-cis-(1S,2R) enantiomer was delayed until the (-)-cis-(1R,2S) enantiomer was completely depleted. When incubated with nonracemic mixtures of para-substituted cis-toluene dihydrodiols, CDD always oxidized the major enantiomer at a higher rate than the minor enantiomer. When incubated with racemic 1-indanol, CDD enantioselectively transformed the (+)-(1S) enantiomer to 1-indanone. This stereoselective transformation shows that CDD also acted as an alcohol dehydrogenase. Additionally, CDD was able to oxidize (+)-cis-(1R,2S)-dihydroxy-1, 2-dihydronaphthalene, (+)-cis-monochlorobiphenyl dihydrodiols, and (+)-cis-toluene dihydrodiol to the corresponding catechols.
authors.affiliation: Swiss Federal Institute for Environmental Sciences and Technology (EAWAG), CH-8600 Dübendorf, Switzerland.
authors.forename: H
authors.initials: H
authors.lastname: Raschke
authors.forename: T
authors.initials: T
authors.lastname: Fleischmann
authors.forename: J R
authors.initials: JR
authors.lastname: Van Der Meer
authors.forename: H P
authors.initials: HP
authors.lastname: Kohler
mesh_terms: D001711:Biotransformation; D002851:Chromatography, High Pressure Liquid; D003001:Cloning, Molecular; D004926:Escherichia coli; D008401:Gas Chromatography-Mass Spectrometry; D007700:Kinetics; D010088:Oxidoreductases / Q000235:genetics / Q000378:metabolism*; D011549:Pseudomonas / Q000201:enzymology*; D011994:Recombinant Proteins / Q000378:metabolism; D013237:Stereoisomerism; D013379:Substrate Specificity
chemical_list: D011994:Recombinant Proteins; D010088:Oxidoreductases; C071576:chlorobenzene dehydrogenase