title: Optimization of fermentation conditions for P450 BM-3 monooxygenase production by hybrid design methodology.
abstract: Factorial design and response surface techniques were used to design and optimize increasing P450 BM-3 expression in E. coli. Operational conditions for maximum production were determined with twelve parameters under consideration: the concentration of FeCl(3), induction at OD(578) (optical density measured at 578 nm), induction time and inoculum concentration. Initially, Plackett-Burman (PB) design was used to evaluate the process variables relevant in relation to P450 BM-3 production. Four statistically significant parameters for response were selected and utilized in order to optimize the process. With the 416C model of hybrid design, response surfaces were generated, and P450 BM-3 production was improved to 57.90x10(-3) U/ml by the best combinations of the physicochemical parameters at optimum levels of 0.12 mg/L FeCl(3), inoculum concentration of 2.10%, induction at OD(578) equal to 1.07, and with 6.05 h of induction.
authors.affiliation: Department of Chemical and Biochemical Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Lu
authors.forename: Le-he
authors.initials: LH
authors.lastname: Mei
mesh_terms: D001410:Bacillus megaterium / Q000201:enzymology / Q000235:genetics; D001426:Bacterial Proteins / Q000096:biosynthesis* / Q000235:genetics; D001709:Biotechnology; D003577:Cytochrome P-450 Enzyme System / Q000096:biosynthesis* / Q000235:genetics; D004926:Escherichia coli / Q000201:enzymology / Q000235:genetics; D005285:Fermentation; D006899:Mixed Function Oxygenases / Q000096:biosynthesis* / Q000235:genetics; D009251:NADPH-Ferrihemoprotein Reductase; D011994:Recombinant Proteins / Q000096:biosynthesis / Q000235:genetics
chemical_list: D001426:Bacterial Proteins; D011994:Recombinant Proteins; D003577:Cytochrome P-450 Enzyme System; D006899:Mixed Function Oxygenases; D009251:NADPH-Ferrihemoprotein Reductase; C052423:flavocytochrome P450 BM3 monoxygenases