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cytochrome P450 family 2, subfamily K Members of CYP2K are present in fish, birds, and amphibians. CYP2K6 from zebrafish has been shown to catalyze the conversion of aflatoxin B1 (AFB1) to its cytotoxic derivative AFB1 exo-8,9-epoxide, while its ortholog in rainbow trout CYP2K1 is also capable of oxidizing lauric acid. In birds, CYP2K is one of the largest CYP2 subfamilies. The CYP2K 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.",