The Enzyme Database

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Accepted name: ultra-long-chain fatty acid ω-hydroxylase
Reaction: an ultra-long-chain fatty acid + [reduced NADPH—hemoprotein reductase] + O2 = an ultra-long-chain ω-hydroxy fatty acid + [oxidized NADPH—hemoprotein reductase] + H2O
Other name(s): CYP4F22 (gene name)
Systematic name: ultra-long-chain fatty acid,[reduced NADPH—hemoprotein reductase]:oxygen oxidoreductase (ω-hydroxylating)
Comments: The enzyme, which is expressed in the epidermis of mammals, catalyses the ω-hydroxylation of ultra-long-chain fatty acids (C28 to C36). The products are incorporated into acylceramides, epidermis-specific ceramide species that are very important for skin barrier formation.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc
1.  Ohno, Y., Nakamichi, S., Ohkuni, A., Kamiyama, N., Naoe, A., Tsujimura, H., Yokose, U., Sugiura, K., Ishikawa, J., Akiyama, M. and Kihara, A. Essential role of the cytochrome P450 CYP4F22 in the production of acylceramide, the key lipid for skin permeability barrier formation. Proc. Natl. Acad. Sci. USA 112 (2015) 7707–7712. [DOI] [PMID: 26056268]
[EC created 2021]

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