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:18719240). Catalyzes the glucuronidation of endogenous steroid hormones such as androgens (epitestosterone, androsterone) and estrogens (estradiol, epiestradiol) (PubMed:18719240) (By similarity). glucuronate acceptor + UDP-alpha-D-glucuronate = acceptor beta-D-glucuronoside + H(+) + UDP 17alpha-estradiol + UDP-alpha-D-glucuronate = 17alpha-estradiol 3-O-(beta-D-glucuronate) + H(+) + UDP 17alpha-estradiol + UDP-alpha-D-glucuronate = 17alpha-estradiol 17-O-(beta-D-glucuronate) + H(+) + UDP 17beta-estradiol + UDP-alpha-D-glucuronate = 17beta-estradiol 17-O-(beta-D-glucuronate) + H(+) + UDP 17beta-hydroxy-5alpha-androstan-3-one + UDP-alpha-D-glucuronate = 5alpha-dihydrotestosterone 17-O-(beta-D-glucuronate) + H(+) + UDP testosterone + UDP-alpha-D-glucuronate = H(+) + testosterone 17-O-(beta-D-glucuronate) + UDP Constitutively expressed. Belongs to the UDP-glycosyltransferase family.