UDPGTs are of major importance in the conjugation and subsequent elimination of potentially toxic xenobiotics and endogenous compounds. This isozyme displays activity toward several classes of xenobiotic substrates, including simple phenolic compounds, 7-hydroxylated coumarins, flavonoids, anthraquinones, and certain drugs and their hydroxylated metabolites. It also catalyzes the glucuronidation of endogenous estrogens and androgens.
The UGT2B15 gene encodes an enzyme responsible for glucuronidation, a phase II metabolic reaction that transforms small lipophilic molecules into water-soluble excretable, hormone metabolites. The UGT2B15 enzyme is highly expressed in the liver and mediates the metabolism of a wide range of substrates, including therapeutic medications such as benzodiazepines.