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cytochrome P450 family 2, subfamily C, and similar cytochrome P450s This CYP2C-like group includes CYP2C, and similar CYPs including mammalian CYP2E1, also called 4-nitrophenol 2-hydroxylase, as well as chicken CYP2H1 and CYP2H2. The CYP2C subfamily is composed of four human members (CYP2C8, CYP2C9, CYP2C18, CYP2C19) that metabolize approximately 20% of clinically used drugs, and all four exhibit genetic polymorphisms that results in toxicity or altered efficacy of some drugs in affected individuals. CYP2E1 participates in the metabolism of endogenous substrates, including acetone and fatty acids, and exogenous compounds such as anesthetics, ethanol, nicotine, acetaminophen, aspartame, and chlorzoxazone, among others. The CYP2C-like subfamily belongs to the large cytochrome P450 (P450, CYP) superfamily of heme-containing proteins that catalyze a variety of oxidative reactions of a large number of structurally different endogenous and exogenous compounds in organisms from all major domains of life. CYPs bind their diverse ligands in a buried, hydrophobic active site, which is accessed through a substrate access channel formed by two flexible helices and their connecting loop. |
Jiyao W et al.(2023). "The conserved domain database in 2023.",