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• W2038676586 abstract "The single mutant F87A of cytochrome P-450 BM-3 from Bacillus megaterium was engineered by rational evolution to achieve improved hydroxylation activity for medium chain length substrates (C8-C10). Rational evolution combines rational design and directed evolution to overcome the drawbacks of these methods when applied individually. Based on the X-ray structure of the enzyme, eight mutation sites (P25, V26, R47, Y51, S72, A74, L188, and M354) were identified by modeling. Sublibraries created by site-specific randomization mutagenesis of each single site were screened using a spectroscopic assay based on omega-p-nitrophenoxycarboxylic acids (pNCA). The mutants showing activity for shorter chain length substrates were combined, and these combi-libraries were screened again for mutants with even better catalytic properties. Using this approach, a P-450 BM-3 variant with five mutations (V26T, R47F, A74G, L188K, and F87A) that efficiently hydrolyzes 8-pNCA was obtained. The catalytic efficiency of this mutant towards omega-p-nitrophenoxydecanoic acid (10-pNCA) and omega-p-nitrophenoxydodecanoic acid (12-pNCA) is comparable to that of the wild-type P-450 BM-3." @default.
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• W2038676586 date "2001-02-01" @default.
• W2038676586 modified "2023-09-26" @default.
• W2038676586 title "Rational evolution of a medium chain-specific cytochrome P -450 BM-3 variant" @default.
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• W2038676586 doi "https://doi.org/10.1016/s0167-4838(00)00268-5" @default.
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