• UGTs are glucuronyltransferases involved in the glucuronidation pathway. This involves the addition of glucuronic acid to excretables such as bilirubin, xenobiotics, and drugs. Substrates tend to be lipophilic in nature.
• Genetic defects in UGT1A1 sequences cause Cringer-Najar syndrome, which prevents the excretion of bilirubin from the liver.
• Glucuronidation is often involved in drug metabolism of substances such as drugs, pollutants, bilirubin, androgens, estrogens, mineralocorticoids, glucocorticoids, fatty acid derivatives, retinoids, and bile acids.