CYP1A2: 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. Most active in catalyzing 2-hydroxylation. Caffeine is metabolized primarily by cytochrome CYP1A2 in the liver through an initial N3-demethylation. Also acts in the metabolism of aflatoxin B1 and acetaminophen. Participates in the bioactivation of carcinogenic aromatic and heterocyclic amines. Catalizes the N-hydroxylation of heterocyclic amines and the O- deethylation of phenacetin. Belongs to the cytochrome P450 family. 2 isoforms of the human protein are produced by alternative splicing.
Protein type: Secondary Metabolites Metabolism - caffeine; Amino Acid Metabolism - tryptophan; Xenobiotic Metabolism - metabolism by cytochrome P450; Cofactor and Vitamin Metabolism - retinol; Lipid Metabolism - linoleic acid; Oxidoreductase; Xenobiotic Metabolism - drug metabolism - cytochrome P450; EC 1.14.14.1
Cellular Component: endoplasmic reticulum; intracellular membrane-bound organelle; membrane
Molecular Function: demethylase activity; enzyme binding; heme binding; iron ion binding; metal ion binding; monooxygenase activity; oxidoreductase activity; oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen; 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
Biological Process: alkaloid metabolic process; aromatic compound metabolic process; cellular respiration; dibenzo-p-dioxin metabolic process; drug catabolic process; drug metabolic process; exogenous drug catabolic process; heterocycle metabolic process; hydrogen peroxide biosynthetic process; lipid metabolic process; lung development; monocarboxylic acid metabolic process; monoterpenoid metabolic process; porphyrin metabolic process; post-embryonic development; regulation of gene expression; steroid catabolic process; steroid metabolic process; toxin biosynthetic process; toxin metabolic process
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