COQ3

coenzyme Q3, methyltransferase

Summary

Ubiquinone, also known as coenzyme Q, or Q, is a critical component of the electron transport pathways of both eukaryotes and prokaryotes (Jonassen and Clarke, 2000 [PubMed 10777520]). This lipid consists of a hydrophobic isoprenoid tail and a quinone head group. The tail varies in length depending on the organism, but its purpose is to anchor coenzyme Q to the membrane. The quinone head group is responsible for the activity of coenzyme Q in the respiratory chain. The S. cerevisiae COQ3 gene encodes an O-methyltransferase required for 2 steps in the biosynthetic pathway of coenzyme Q. This enzyme methylates an early coenzyme Q intermediate, 3,4-dihydroxy-5-polyprenylbenzoic acid, as well as the final intermediate in the pathway, converting demethyl-ubiquinone to coenzyme Q. The COQ3 gene product is also capable of methylating the distinct prokaryotic early intermediate 2-hydroxy-6-polyprenyl phenol.[supplied by OMIM, Mar 2008]

Known Variants24 total

rsidPosition (GRCh37)AllelesClassClinVar
rs1476099546:99,817,513C/Tuncertain significance
rs7535068036:99,817,634A/Tuncertain significance
rs7614072046:99,817,635A/Tuncertain significance
rs7775422766:99,817,675A/Guncertain significance
rs25358232026:99,817,678G/Auncertain significance
rs1469343366:99,819,306G/Auncertain significance
rs1379667736:99,819,393G/Auncertain significance
rs7789043276:99,819,436T/Cuncertain significance
rs9921712056:99,823,823A/Guncertain significance
rs1459760446:99,823,838T/Cuncertain significance
rs7705544386:99,823,854G/Tuncertain significance
rs11620699826:99,823,880G/Auncertain significance
rs7655263536:99,823,911T/Cuncertain significance
rs1388738806:99,823,941C/Tlikely benign
rs11849320386:99,823,943C/Tuncertain significance
rs1422957826:99,824,005G/Alikely benign
rs12758036846:99,824,022C/Guncertain significance
rs5535977136:99,824,040C/Guncertain significance
rs25358417696:99,825,347T/Guncertain significance
rs115483366:99,825,348T/Cmissense variant
rs3693602916:99,831,646T/Clikely benign
rs25358570936:99,831,684C/Auncertain significance
rs111548116:99,836,809A/T
rs1464141086:99,841,982G/Tuncertain significance

Gene information from NCBI Gene. Variant classifications from ClinVar.