A cytochrome P450 monooxygenase involved in the metabolism of fatty acids. Catalyzes predominantly the oxidation of the terminal carbon (omega-oxidation) of long-chain fatty acids (By similarity). Acts as a major omega-hydroxylase for dodecanoic (lauric) acid in liver (PubMed:17112342) (By similarity). In kidney, may play an important role in omega-hydroxylation of (5Z,8Z,11Z,14Z)-eicosatetraenoic acid (arachidonate) to 20-hydroxyeicosatetraenoic acid (20-HETE), a signaling molecule acting both as vasoconstrictive and natriuretic with overall effect on arterial blood pressure (By similarity). Also participates in the formation of anti-inflammatory hydroxyepoxyeicosatrienoic acids (HEETs) in kidney by converting 8,9-epoxyeicosatrienoic acid (EET) to 20,8,9-HEET, an activator of PPARA. Displays substantially lower fatty acid omega-1 hydroxylase activity (By similarity). 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). 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] dodecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 11-hydroxydodecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] O2 + reduced [NADPH--hemoprotein reductase] + tetradecanoate = 14-hydroxytetradecanoate + 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] (9Z,12Z)-octadecadienoate + O2 + reduced [NADPH--hemoprotein reductase] = 18-hydroxy-(9Z,12Z)-octadecadienoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z,12Z)-octadecadienoate + O2 + reduced [NADPH--hemoprotein reductase] = 17-hydroxy-(9Z,12Z)-octadecadienoate + 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] 8,9-epoxy-(5Z,11Z,14Z)-eicosatrienoate + O2 + reduced [NADPH--hemoprotein reductase] = 20-hydroxy-8,9-epoxy-(5Z,11Z,14Z)-eicosatrienoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Highly expressed in the kidneys of both genders. Mutant mice are hypertensive due to constitutive activation of renal epithelial sodium channels and increased sodium reabsorption. Belongs to the cytochrome P450 family.