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We developed a system for bioconverting diverse compounds using P450s produced in Escherichia coli. Vectors for the expressing various P450 cDNAs quickly and easily in E. coli were developed by using several restriction enzyme sites. Three types of P450 (2C2, 2C29, and 2D22) were produced using these plasmids. Substrates were directly added to the incubation medium and metabolized. To obtain pure product from the medium, we first tried production of P450 in synthetic medium. The amount of another P450 2C43 produced in the synthetic medium was similar to the amount produced in Luria broth (LB) medium. Next, estradiol, a steroid, was added as a substrate, incubated, and the metabolite was extracted and analyzed by high-performance liquid chromatography. The metabolite extracted from synthetic medium was purer than that obtained from LB medium. Three P450s (2C29, 2C2, and 2A4) metabolized testosterone at different positions. P450 2C29 metabolized 7-ethoxycoumarin, androstendione, and dehydroepiandrosterone in this medium. P450s produced in the synthetic medium may be useful for producing various modified compounds for high-throughput screening.
Journal of Industrial Microbiology Biotechnology – Springer Journals
Published: Aug 5, 2006
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