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- W2052607746 abstract "Cytochrome P450 BM-3 (CYP102) catalyzes the subterminal hydroxylation of fatty acids with a chain length of 12–22 carbons. The paper focuses on the regioselectivity and substrate specificity of the purified wild-type enzyme and five mutated variants towards caprylic, capric, and lauric acid. The enzymes were obtained by random mutagenic fine-tuning of the mutant F87A(LARV). F87A(LARV) was selected as the best enzyme variant in a previous study in which the single mutant F87A was subjected to rational evolution to achieve hydroxylation activity for short chain length substrates using a p-nitrophenolate-based spectrophotometric assay. The best mutants, F87V(LAR) and F87V(LARV), show a higher catalytic activity towards ω-(p-nitrophenoxy)decanoic acid (10-p-NCA) than F87A(LARV). In addition, they proved capable of hydroxylating ω-(p-nitrophenoxy)octanoic acid (8-p-NCA) which the wild-type enzyme is unable to do. Both variants catalyzed hydroxylation of capric acid, which is not a substrate for the wild-type, with a conversion rate of up to 57%. The chain length specificity of the mutants in fatty acid hydroxylation processes shows a good correlation with their activity towards p-NCA pseudosubstrates. The p-NCA assay therefore, allows high-throughput screening of large mutant libraries for the identification of enzyme variants with the desired catalytic activity towards fatty acids as the natural substrates." @default.
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- W2052607746 date "2001-11-01" @default.
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- W2052607746 title "Modification of the fatty acid specificity of cytochrome P450 BM-3 from Bacillus megaterium by directed evolution: a validated assay" @default.
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- W2052607746 doi "https://doi.org/10.1016/s1381-1177(01)00015-7" @default.
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