UGT1A8

Description

The UGT1A8 (UDP glucuronosyltransferase family 1 member A8) is a protein-coding gene located on chromosome 2.

UDP-glucuronosyltransferase 1-8 is an enzyme that in humans is encoded by the UGT1A8 gene.

== Function == This gene encodes a UDP-glucuronosyltransferase, an enzyme of the glucuronidation pathway that transforms small lipophilic molecules, such as steroids, bilirubin, hormones, and drugs, into water-soluble, excretable metabolites. This gene is part of a complex locus that encodes several UDP-glucuronosyltransferases. The locus includes thirteen unique alternate first exons followed by four common exons. Four of the alternate first exons are considered pseudogenes. Each of the remaining nine 5′ exons may be spliced to the four common exons, resulting in nine proteins with different N-termini and identical C-termini. Each first exon encodes the substrate binding site, and is regulated by its own promoter. The enzyme encoded by this gene has glucuronidase activity with many substrates including coumarins, phenols, anthraquinones, flavones, and some opioids.

== References ==

This article incorporates text from the United States National Library of Medicine, which is in the public domain.

[Isoform 1]: UDP-glucuronosyltransferase (UGT) that catalyzes phase II biotransformation reactions in which lipophilic substrates are conjugated with glucuronic acid to increase the metabolite's water solubility, thereby facilitating excretion into either the urine or bile (PubMed:15472229, PubMed:16595710, PubMed:18052087, PubMed:18004212, PubMed:18674515, PubMed:18719240, PubMed:19545173, PubMed:23288867). Essential for the elimination and detoxification of drugs, xenobiotics and endogenous compounds (PubMed:15472229, PubMed:16595710, PubMed:23288867). Catalyzes the glucuronidation of endogenous steroid hormones such as androgens and estrogens (PubMed:15472229, PubMed:16595710, PubMed:18719240, PubMed:23288867). Produces dihydrotestosterone (DHT) diglucuronide from the DHT after two subsequent glucoronidation steps (PubMed:16595710). Also catalyzes the glucuronidation of the isoflavones genistein, daidzein, glycitein, formononetin, biochanin A and prunetin, which are phytoestrogens with anticancer and cardiovascular properties (PubMed:18052087, PubMed:19545173). Involved in the glucuronidation of the AGTR1 angiotensin receptor antagonist caderastan, a drug which can inhibit the effect of angiotensin II (PubMed:18674515). Also metabolizes mycophenolate, an immunosuppressive agent (PubMed:15470161, PubMed:18004212). {ECO:0000269|PubMed:15470161, ECO:0000269|PubMed:15472229, ECO:0000269|PubMed:16595710, ECO:0000269|PubMed:18004212, ECO:0000269|PubMed:18052087, ECO:0000269|PubMed:18674515, ECO:0000269|PubMed:18719240, ECO:0000269|PubMed:19545173, ECO:0000269|PubMed:23288867}.

UGT1A8 is also known as GNT1, UDPGT, UDPGT 1-1, UDPGT 1-8, UGT-1A, UGT-1H, UGT1, UGT1-01, UGT1-08, UGT1.1, UGT1.8, UGT1A, UGT1A1, UGT1A8S, UGT1H, hUG-BR1.

Associated Diseases

WES Whole Exome Sequencing

Clinical Exome Sequencing