Mechanisms of cytochrome P450 substrate oxidation: MiniReview
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منابع مشابه
Oxidation of Methoxyphenethylamines by Cytochrome P450 2D6
Cytochrome P450 (P450) 2D6 is involved in the oxidation of a large fraction ( 30%) of drugs used by humans and also catalyzes the O-demethylation of the model substrates 3and 4-methoxyphenethylamine followed by subsequent ring hydroxylation to dopamine. Burst kinetics were not observed; rate-limiting step(s) must occur prior to product formation. Rates of reduction of ferric P450 2D6 were stimu...
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Estrogen and its metabolites are believed to play important roles in breast cancer. The influence of genetic polymorphisms in the enzymes responsible for formation and disposition of estrogen on breast cancer risk may shed light on the importance of estrogen metabolites in this disease. However, for such studies to be valid, it is important to correctly identify the enzymes involved in estrogen...
متن کاملMechanism of oxidation reactions catalyzed by cytochrome p450 enzymes.
ion phase that leads to an alkyl radical coordinated to the iron-hydroxo complex by a weak OH---C hydrogen bond, labeled as CI; (ii) an alkyl (or OH) rotation phase whereby the alkyl group achieves a favorable orientation for rebound; and (iii) a rebound phase that leads to C-O bond making and the ferric-alcohol complexes, 4,2P. The two profiles remain close in energy throughout the first two p...
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M01A82W, M11A82W and M01A82WS72I are three cytochrome P450 BM3 (CYP102A1) variants. They can catalyze the hydroxylation of testosterone (TES) and norethisterone at different positions, thereby making them promising biocatalysts for steroid hydroxylation. With the aim of obtaining more hydroxylated steroid precursors it is necessary to probe the steroidal substrate diversity of these BM3 variant...
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Human cytochrome P450 (P450) 1B1 (CYP1B1) has recently been shown to be an important enzyme in the activation of diverse procarcinogens such as arylarenes, nitroarenes, and arylamines to reactive metabolites that cause DNA damage in the cells. However, it is not known whether this P450 enzyme also plays roles in the oxidation of certain drugs or model substrates commonly used in P450 assays. We...
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ژورنال
عنوان ژورنال: Journal of Biochemical and Molecular Toxicology
سال: 2007
ISSN: 1095-6670,1099-0461
DOI: 10.1002/jbt.20174