Crocetin glucosyltransferase (, 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.
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