Reaction: (1) UDP-glucose + crocetin = UDP + β-D-glucosyl crocetin
(2) UDP-glucose + β-D-glucosyl crocetin = UDP + bis(β-D-glucosyl) crocetin
(3) UDP-glucose + β-D-gentiobiosyl crocetin = UDP + β-D-gentiobiosyl β-D-glucosyl crocetin
For diagram of reaction click here.
Other name(s): crocetin GTase; UGTCs2
Systematic name: UDP-glucose:crocetin 8-O-D-glucosyltransferase
Comments: In Crocus sativus this enzyme esterifies a free carboxyl group of crocetin or crocetin glycosyl ester.
Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number:
References:
1. Côté, F., Cormier, F., Dufresne, C. and Willemot, C. Properties of a glucosyltransferase involved in crocin synthesis. Plant Sci. 153 (2000) 55-63.
2. Moraga, A.R., Nohales, P.F., Perez, J.A. and Gomez-Gomez, L. Glucosylation of the saffron apocarotenoid crocetin by a glucosyltransferase isolated from Crocus sativus stigmas. Planta 219 (2004) 955-966. [PMID: 15605174]