Recombinant Human UDP-glucuronosyltransferase 1A9 (UGT1A9), Truncated

Uniprot Id

O60656

Target Species

Human

Target Name

UGT1A9

Target Full Name

UDP-glucuronosyltransferase 1A9

Target Function

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. Essential for the elimination and detoxification of drugs, xenobiotics and endogenous compounds. Catalyzes the glucuronidation of endogenous estrogen hormones such as estradiol and estrone. Also catalyzes the glucuronidation of the isoflavones genistein, daidzein, glycitein, formononetin, biochanin A and prunetin, which are phytoestrogens with anticancer and cardiovascular properties. Involved in the glucuronidation of the AGTR1 angiotensin receptor antagonist caderastan, a drug which can inhibit the effect of angiotensin II. Involved in the biotransformation of 7-ethyl-10-hydroxycamptothecin (SN-38), the pharmacologically active metabolite of the anticancer drug irinotecan. Also metabolizes mycophenolate, an immunosuppressive agent.; Lacks UGT glucuronidation activity but acts as a negative regulator of isoform 1.

Target Subcellular Location

Endoplasmic reticulum membrane; Single-pass membrane protein.

Target Protein Families

UDP-glycosyltransferase family

Target Tissue Specificity

[Isoform 1]: Expressed in liver, kidney, colon, esophagus and small intestine.; [Isoform 2]: Expressed in liver, kidney, colon, esophagus and small intestine.

Target Synonyms

UGT1A9; GNT1; UGT1; UDP-glucuronosyltransferase 1A9; UGT1A9; UDP-glucuronosyltransferase 1-9; UDPGT 1-9; UGT1*9; UGT1-09; UGT1.9; UDP-glucuronosyltransferase 1-I; UGT-1I; UGT1I; lugP4

Target Background

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 is active on phenols.