FMO4
Identifiers
Aliases	FMO4, FMO2, flavin containing monooxygenase 4, flavin containing dimethylaniline monoxygenase 4
External IDs	OMIM: 136131 MGI: 2429497 HomoloGene: 68219 GeneCards: FMO4
Gene location (Human) Chr. Chromosome 1 (human)[1] Band 1q24.3 Start 171,314,183 bp[1] End 171,342,084 bp[1]
Gene location (Mouse) Chr. Chromosome 1 (mouse)[2] Band 1 H2.1|1 70.34 cM Start 162,620,757 bp[2] End 162,641,541 bp[2]
RNA expression pattern Bgee Human Mouse (ortholog) Top expressed in kidney tubule right lobe of liver kidney glomerulus metanephric glomerulus ascending aorta Achilles tendon palpebral conjunctiva left coronary artery pancreatic ductal cell Top expressed in yolk sac jejunum proximal tubule duodenum ileum secondary oocyte kidney liver intestinal villus colon More reference expression data BioGPS More reference expression data
Orthologs Species Human Mouse Entrez 2329 226564 Ensembl ENSG00000076258 ENSMUSG00000026692 UniProt P31512 Q8VHG0 RefSeq (mRNA) NM_002022 NM_144878 RefSeq (protein) NP_002013 NP_659127 Location (UCSC) Chr 1: 171.31 – 171.34 Mb Chr 1: 162.62 – 162.64 Mb PubMed search [3] [4]
Wikidata
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Dimethylaniline monooxygenase [N-oxide-forming] 4 is an enzyme that in humans is encoded by the FMO4 gene.^[5][6]

Function

Metabolic N-oxidation of the diet-derived amino-trimethylamine (TMA) is mediated by flavin-containing monooxygenase and is subject to an inherited FMO3 polymorphism in man resulting in a small subpopulation with reduced TMA N-oxidation capacity resulting in fish odor syndrome Trimethylaminuria. Three forms of the enzyme, FMO1 found in fetal liver, FMO2 found in adult liver, and FMO3 are encoded by genes clustered in the 1q23-q25 region. Flavin-containing monooxygenases are NADPH-dependent flavoenzymes that catalyzes the oxidation of soft nucleophilic heteroatom centers in drugs, pesticides, and xenobiotics.^[6]

Cancer

FMO4 gene has been observed progressively downregulated in Human papillomavirus-positive neoplastic keratinocytes derived from uterine cervical preneoplastic lesions at different levels of malignancy. ^[7] For this reason, FMO4 is likely to be associated with tumorigenesis and may be a potential prognostic marker for uterine cervical preneoplastic lesions progression. ^[7]