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• W1964525206 endingPage "1449" @default.
• W1964525206 startingPage "1439" @default.
• W1964525206 abstract "Steroids are important pharmaceutically active compounds. In contrast to the liver drug-metabolising cytochrome P450s, which metabolise a variety of substrates, steroid hydroxylases generally display a rather narrow substrate specificity. It is therefore a challenging goal to change their regio- and stereoselectivity. CYP106A2 is one of only a few bacterial steroid hydroxylases and hydroxylates 3-oxo-Delta4-steroids mainly in 15beta-position. In order to gain insights into the structure and function of this enzyme, whose crystal structure is unknown, a homology model has been created. The substrate progesterone was then docked into the active site to predict which residues might affect substrate binding. The model was substantiated by using a combination of theoretical and experimental investigations. First, numerous computational structure evaluation tools assessed the plausibility of its protein geometry and its quality. Second, the model explains many key properties of common cytochrome P450s. Third, two sets of mutants have been heterologously expressed, and the influence of the mutations on the catalytic activity towards deoxycorticosterone and progesterone has been studied experimentally: the first set comprises six mutations located in the structurally variable regions of this enzyme that are very difficult to predict by cytochrome P450 modelling (K27R, I86T, E90V, I71T, D185G and I215T). For these positions, no participation in the active-site formation was predicted, or could be experimentally demonstrated. The second set comprises five mutants in substrate recognition site 6 (S394I, A395L, T396R, G397P and Q398S). For these residues, participation in active-site formation and an influence on substrate binding was predicted by docking. These mutants are based on an alignment with human CYP11B1, and in fact most of these mutants altered the active-site structure and the hydroxylation activity of CYP106A2 dramatically." @default.
• W1964525206 created "2016-06-24" @default.
• W1964525206 creator A5011303922 @default.
• W1964525206 creator A5051147436 @default.
• W1964525206 creator A5081948104 @default.
• W1964525206 creator A5089970062 @default.
• W1964525206 date "2008-06-16" @default.
• W1964525206 modified "2023-09-28" @default.
• W1964525206 title "Theoretical and Experimental Evaluation of a CYP106A2 Low Homology Model and Production of Mutants with Changed Activity and Selectivity of Hydroxylation" @default.
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• W1964525206 doi "https://doi.org/10.1002/cbic.200700670" @default.
• W1964525206 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/18481342" @default.
• W1964525206 hasPublicationYear "2008" @default.
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