CYP2B6 Peptide - Middle Region Blocking Peptide

This gene, CYP2B6, encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which 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 phenobarbital. The enzyme is known to metabolize some xenobiotics, such as the anti-cancer drugs cyclophosphamide and ifosphamide. Transcript variants for this gene have been described; however, it has not been resolved whether these transcripts are in fact produced by this gene or by a closely related pseudogene, CYP2B7. Both the gene and the pseudogene are located in the middle of a CYP2A pseudogene found in a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. [provided by RefSeq, Jul 2008]

CYP2B6: cytochrome P450, subfamily IIB. Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Phosphorylation is accompanied by a decrease in enzyme activity.

Protein type: Lipid Metabolism - arachidonic acid; Cofactor and Vitamin Metabolism - retinol; Xenobiotic Metabolism - metabolism by cytochrome P450; Oxidoreductase; Xenobiotic Metabolism - drug metabolism - cytochrome P450; EC 1.14.14.1

Chromosomal Location of Human Ortholog: 19q13.2

Cellular Component: endoplasmic reticulum membrane; intracellular membrane-bound organelle; cytoplasm

Molecular Function: iron ion binding; oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen; heme binding; arachidonic acid epoxygenase activity; steroid hydroxylase activity; oxygen binding; monooxygenase activity

Biological Process: steroid metabolic process; ketone metabolic process; xenobiotic metabolic process; exogenous drug catabolic process; epoxygenase P450 pathway; drug metabolic process

Disease: Efavirenz, Poor Metabolism Of