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- W2045441478 abstract "CYP175A1 is a thermophilic cytochrome P450 and hydroxylates beta-carotene. We previously identified a native electron transport system for CYP175A1. In this report, we constructed two fusion proteins consisting of CYP175A1, ferredoxin (Fdx), and ferredoxin-NADP(+) reductase (FNR): H(2)N-CYP175A1-Fdx-FNR-COOH (175FR) and H(2)N-CYP175A1-FNR-Fdx-COOH (175RF). Both 175FR and 175RF were expressed in Escherichia coli and purified. The V(max) value for beta-carotene hydroxylation was 25 times higher with 175RF than 175FR and 9 times higher with 175RF than CYP175A1 (non-fused protein), although the k(m) values of these enzymes were similar. 175RF retained 50% residual activity even at 80 degrees C. Furthermore, several mutants of the CYP175A1 domain of 175RF were prepared and one mutant (Q67G/Y68I) catalyzed the hydroxylation of an unnatural substrate, testosterone. Thus, this is the first report of a thermostable self-sufficient cytochrome P450 and the engineering of a thermophilic cytochrome P450 for the oxidation of an unnatural substrate." @default.
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- W2045441478 date "2009-06-01" @default.
- W2045441478 modified "2023-09-24" @default.
- W2045441478 title "Construction and engineering of a thermostable self-sufficient cytochrome P450" @default.
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- W2045441478 doi "https://doi.org/10.1016/j.bbrc.2009.04.064" @default.
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