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Cytochrome P450 46A1 (CYP46A1) and NADPH-cytochrome P450 oxidoreductase (CPR) are the components of the brain microsomal mixed-function monooxygenase system that catalyzes the conversion of cholesterol to 24-hydroxycholesterol. Both CYP46A1 and CPR are monotopic membrane proteins that are anchored to the endoplasmic reticulum via the N-terminal transmembrane domain. The exact mode of peripheral association...
Mitochondrial cytochrome P450 enzymes (CYP or P450, EC 1.14.13.15) play an important role in metabolism of cholesterol. CYP27A1 hydroxylates cholesterol at position 27 and, thus, initiates cholesterol removal from many extrahepatic tissues. CYP11A1 is a steroidogenic P450 that converts cholesterol to pregnenolone, the first step in the biosynthesis of all steroid hormones. We utilized a new approach...
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