title: Improving Gluconobacter oxydans performance in the in situ removal of the inhibitor for asymmetric resolution of racemic 1-phenyl-1,2-ethanediol.
abstract: Gluconobacter oxydans DSM2003 was used to catalyze the oxidation of racemic 1-phenyl-1,2-ethanediol (PED) for the production of (S)-enantiomer. The oxidative product mandelic acid produced strong inhibition to this reaction and largely reduced the activity of biocatalyst, which was the key problem in the reaction. In order to overcome this bottleneck, an anion exchange resin was selected and introduced as adsorbent for the in situ removal of the inhibitor from the reaction system. This method increased the substrate concentration from 12 to 60 g/L and the yield of (S)-PED by approximately five times from 4.9 g/L, on the premise that the enantiomeric excess (ee) value of (S)-PED remained above 96% and the reaction time was no more than 20 h. Moreover, the final space-time yield was over 1.2g/L/h, which was higher than that reported from previous studies.
authors.affiliation: State Key Laboratory of Bioreactor Engineering, NewWorld Institute of Biotechnology, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China. Electronic address: lidaihuan@gmail.com.
authors.forename: Dai-Huan
authors.initials: DH
authors.lastname: Li
authors.affiliation: State Key Laboratory of Bioreactor Engineering, NewWorld Institute of Biotechnology, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China. Electronic address: jplin@ecust.edu.cn.
authors.forename: Jin-Ping
authors.initials: JP
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Bioreactor Engineering, NewWorld Institute of Biotechnology, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China. Electronic address: dzhwei@ecust.edu.cn.
authors.forename: Dong-Zhi
authors.initials: DZ
authors.lastname: Wei
mesh_terms: D000327:Adsorption; D000837:Anion Exchange Resins / Q000737:chemistry; D001673:Biodegradation, Environmental / Q000187:drug effects; D005026:Ethylene Glycols / Q000737:chemistry* / Q000378:metabolism*; D020600:Gluconobacter oxydans / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D008333:Mandelic Acids / Q000302:isolation & purification* / Q000494:pharmacology; D010084:Oxidation-Reduction / Q000187:drug effects; D013237:Stereoisomerism; D013379:Substrate Specificity / Q000187:drug effects
chemical_list: D000837:Anion Exchange Resins; D005026:Ethylene Glycols; D008333:Mandelic Acids; C031474:styrene glycol; C037938:mandelic acid
keywords: 1-Phenyl-1,2-ethanediol; Anion exchange resin; Asymmetry resolution; Biocatalysis; Gluconobacter oxydans