Glutathione Gamma-glutamylcysteinyltransferase

In enzymology, a glutathione gamma-glutamylcysteinyltransferase (EC 2.3.2.15) is an enzyme that catalyzes the chemical reaction

glutathione + n-Gly Gly + n+1-Gly

Thus, the two substrates of this enzyme are glutathione and n-Gly]], whereas its two products are Gly and n+1-Gly]].

This enzyme belongs to the family of transferases, specifically the aminoacyltransferases. The systematic name of this enzyme class is glutathione:poly(4-glutamyl-cysteinyl)glycine 4-glutamylcysteinyltransferase. Other names in common use include phytochelatin synthase, and gamma-glutamylcysteine dipeptidyl transpeptidase.