enzymology Enzymes () are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. A ...

, a bilirubin-glucuronoside glucuronosyltransferase () is an enzyme that

catalyzes Catalysis () is the process of increasing the rate of a chemical reaction by adding a substance known as a catalyst (). Catalysts are not consumed in the reaction and remain unchanged after it. If the reaction is rapid and the catalyst recyc ...

the chemical reaction :2 bilirubin-glucuronoside

\rightleftharpoons

bilirubin + bilirubin-bisglucuronoside Hence, this enzyme has one

substrate Substrate may refer to: Physical layers *Substrate (biology), the natural environment in which an organism lives, or the surface or medium on which an organism grows or is attached ** Substrate (locomotion), the surface over which an organism lo ...

, bilirubin-glucuronoside, and two products,

bilirubin Bilirubin (BR) (Latin for "red bile") is a red-orange compound that occurs in the normal catabolic pathway that breaks down heme in vertebrates. This catabolism is a necessary process in the body's clearance of waste products that arise from the ...

and bilirubin-bisglucuronoside. This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is bilirubin-glucuronoside:bilirubin-glucuronoside D-glucuronosyltransferase. Other names in common use include bilirubin monoglucuronide transglucuronidase, and bilirubin glucuronoside glucuronosyltransferase.

References

* EC 2.4.1 Enzymes of unknown structure {{2.4-enzyme-stub