||Recombinant Human CYP3A4 was expressed in Saccharomyces cerevisiae.
||This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases that catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by glucocorticoids and some pharmacological agents. This enzyme is involved in the metabolism of approximately half the drugs in use today, including acetaminophen, codeine, cyclosporin A, diazepam and erythromycin. The enzyme also metabolizes some steroids and carcinogens. This gene is part of a cluster of cytochrome P450 genes on chromosome 7q21.1. Previously another CYP3A gene, CYP3A3, was thought to exist; however, it is now thought that this sequence represents a transcript variant of CYP3A4. Alternatively spliced transcript variants encoding different isoforms have been identified.
||50 mM Tris (pH 7.4), 1 mM EDTA, 20% glycerol
||activity: ≥10 units/pmol enzymesecondary activity: ≥20 units/mg protein (Reductase activity)
||P450 Activity: One unit will oxidize 1 picomole of testosterone per minute at pH 7.4 at 30 °C.Reductase Activity: One unit will reduce 1 nanomole of cytochrome C per minute in the presence of NADPH at pH 7.4 at 28 °C.
||≤60 mg/mL (Protein)≥10 pmol/mg protein (P450)