COMT, Official Symbol COMTprovided by HGNC Official Full Name catechol-O-methyltransferaseprovided by HGNC Primary source HGNC:HGNC:2228 See related Ensembl:ENSG00000093010 MIM:116790; AllianceGenome:HGNC:2228 Gene type protein coding RefSeq status REVIEWED Organism Homo sapiens Lineage Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo Also known as HEL-S-98n Summary Catechol-O-methyltransferase catalyzes the transfer of a methyl group from S-adenosylmethionine to catecholamines, including the neurotransmitters dopamine, epinephrine, and norepinephrine. This O-methylation results in one of the major degradative pathways of the catecholamine transmitters. In addition to its role in the metabolism of endogenous substances, COMT is important in the metabolism of catechol drugs used in the treatment of hypertension, asthma, and Parkinson disease. COMT is found in two forms in tissues, a soluble form (S-COMT) and a membrane-bound form (MB-COMT). The differences between S-COMT and MB-COMT reside within the N-termini. Several transcript variants are formed through the use of alternative translation initiation sites and promoters. [provided by RefSeq, Sep 2008] Expression Ubiquitous expression in placenta (RPKM 32.2), adrenal (RPKM 24.9) and 25 other tissues See more Orthologs mouse all