A cytochrome P450 monooxygenase involved in the metabolism of various endogenous substrates, including fatty acids and their oxygenated derivatives (oxylipins) (PubMed:24138531, PubMed:15364545, PubMed:18065749). Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase) (PubMed:15364545, PubMed:18065749, PubMed:24138531). Catalyzes with high efficiency the oxidation of the terminal carbon (omega-oxidation) of 3-hydroxy fatty acids, such as 3-hydroxyhexadecanoic and 3-hydroxyoctadecanoic acids, likely participating in the biosynthesis of long-chain 3-hydroxydicarboxylic acids (PubMed:18065749, PubMed:19932081). Omega-hydroxylates and inactivates phylloquinone (vitamin K1), and menaquinone-4 (MK-4, a form of vitamin K2), both acting as cofactors in blood coagulation (PubMed:24138531). Metabolizes with low efficiciency fatty acids, including (5Z,8Z,11Z,14Z)-eicosatetraenoic acid (arachidonate) and its oxygenated metabolite 8-hydroxyeicosatetraenoic acid (8-HETE) (PubMed:15364545, PubMed:19932081). Catalyzes N- and O-demethylation of drugs such as erythromycin, benzphetamine, ethylmorphine, chlorpromazine, imipramine and verapamil (PubMed:15364545). an organic molecule + O2 + reduced [NADPH--hemoprotein reductase] = an alcohol + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] an omega-methyl-long-chain fatty acid + O2 + reduced [NADPH--hemoprotein reductase] = an omega-hydroxy-long-chain fatty acid + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] dodecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 12-hydroxydodecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] hexadecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 16-hydroxyhexadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-octadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = 18-hydroxy-(9Z)-octadecenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (5Z,8Z,11Z,14Z)-eicosatetraenoate + O2 + reduced [NADPH--hemoprotein reductase] = 20-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoate + O2 + reduced [NADPH--hemoprotein reductase] = 22-hydroxy-(4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] 8-hydroxy-(5Z,9E,11Z,14Z)-eicosatetraenoate + O2 + reduced [NADPH--hemoprotein reductase] = 8,20-dihydroxy-(5Z,9E,11Z,14Z)-eicosatetraenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] 3-hydroxyhexadecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 3,16-dihydroxyhexadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] 3-hydroxyoctadecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 3,18-dihydroxyoctadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] O2 + phylloquinone + reduced [NADPH--hemoprotein reductase] = H(+) + H2O + omega-hydroxyphylloquinone + oxidized [NADPH--hemoprotein reductase] menaquinone-4 + O2 + reduced [NADPH--hemoprotein reductase] = H(+) + H2O + omega-hydroxymenaquinone-4 + oxidized [NADPH--hemoprotein reductase] kcat is 0.088 min(-1) with menaquinone-4 (MK-4) as substrate (PubMed:24138531). kcat is 1.8 min(-1) with hexadecanoic acid as substrate. kcat is 1.0 min(-1) with (9Z)-octadecenoic acid as substrate. kcat is 0.54 min(-1) with (5Z,8Z,11Z,14Z)-eicosatetraenoic acid (arachidonate) as substrate. kcat is 0.35 min(-1) with (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoic acid as substrate. kcat is 27.5 min(-1) with 3-hydroxyhexadecanoic acid as substrate (PubMed:19932081). Lipid metabolism; arachidonate metabolism. Lipid metabolism; oxylipin biosynthesis. Cofactor degradation; phylloquinone degradation. Xenobiotic degradation. Expressed mainly in human liver, followed by kidney, heart, and skeletal muscle. Belongs to the cytochrome P450 family.