Flavin-containing monooxygenase 2 (FMO2), also known as dimethylaniline monooxygenase [N-oxide-forming] 2, is a mammalian enzyme that in humans is encoded by the FMO2 gene.[5][6][7] The gene is found in a cluster with the FMO1, FMO3, and FMO4 genes on chromosome 1.[7]
AliasesFMO2, FMO1B1, flavin containing monooxygenase 2, flavin containing dimethylaniline monoxygenase 2 Quick facts Identifiers, Aliases ...
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FMO2 is a member of the family of flavin-containing monooxygenases, NADPH-dependent enzymes that catalyze the oxidation of many drugs and xenobiotics. It catalyzes the N-oxidation of some primary alkylamines through an N-hydroxylamine intermediate.[7]
In humans, FMO2 is expressed in lung tissue.[8] The most common isoform, FMO2*2A, contains a premature stop codon, leading to a truncated protein with no catalytic activity that is probably rapidly degraded.[7] The other isoform, FMO2*1, present in sub-Saharan Africans (up to 50%), African-Americans (26%) and Hispanics (2–7%), is functional.[8][9] Its substrates include thioether-containing pesticides, the anti-tuberculosis drug ethionamide, as well as α-naphthylthiourea and other thioureas.[9]
