Catalyzes the first step of sophorolipid biosynthesis. Catalyzes the terminal (at the omega-position) or subterminal (at the omega(-1)-position) hydroxylation of a fatty acid. This converts the fatty acid to a substrate for the subsequent glycosyltransferase reactions (PubMed:23516968, PubMed:24242247). Oleic acid is the preferred substrate, but it acts on various other C-16, C-18 and C-20 saturated and unsaturated fatty acids, namely palmitic, palmitoleic, stearic, linoleic, cis-9,10-epoxystearic, trans-9,10-epoxystearic and arachidonic acid (PubMed:24242247). 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] an (omega-1)-ethyl fatty acid + O2 + reduced [NADPH--hemoprotein reductase] = an (omega-1)-hydroxy-long-chain fatty acid + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-octadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = 18-hydroxy-(9Z)-octadecenoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-octadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = 17-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] hexadecanoate + O2 + reduced [NADPH--hemoprotein reductase] = 16-hydroxyhexadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] (9Z)-hexadecenoate + O2 + reduced [NADPH--hemoprotein reductase] = (9Z)-16-hydroxyhexadec-9-enoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] O2 + octadecanoate + reduced [NADPH--hemoprotein reductase] = 18-hydroxyoctadecanoate + H(+) + H2O + oxidized [NADPH--hemoprotein reductase] Optimum pH is 7. Optimum temperature is 25-30 degrees Celsius. Only expressed in stationary phase. Belongs to the cytochrome P450 family.