Crocetin glucosyltransferase

Crocetin glucosyltransferase (EC 2.4.1.271, crocetin GTase, UGTCs2) is an enzyme with systematic name UDP-glucose:crocetin 8-O-D-glucosyltransferase. This enzyme catalyses the following chemical reaction

(1) UDP-glucose + crocetin ⇌ UDP + beta-D-glucosyl crocetin (2) UDP-glucose + beta-D-glucosyl crocetin ⇌ UDP + bis(beta-D-glucosyl) crocetin (3) UDP-glucose + beta-D-gentiobiosyl crocetin ⇌ UDP + beta-D-gentiobiosyl beta-D-glucosyl crocetin

In Crocus sativus this enzyme esterifies a free carboxyl group of crocetin or crocetin glycosyl ester.