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In enzymology, a scopoletin glucosyltransferase (EC 2.4.1.128) is an enzyme that catalyzes the chemical reaction

UDP-glucose + scopoletin UDP + scopolin

Thus, the two substrates of this enzyme are UDP-glucose and scopoletin, whereas its two products are UDP and scopolin.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-glucose:scopoletin O-beta-D-glucosyltransferase. Other names in common use include uridine diphosphoglucose-scopoletin glucosyltransferase, UDP-glucose:scopoletin glucosyltransferase, and SGTase. This enzyme participates in phenylpropanoid biosynthesis.

References

• Hino F, Okazaki M, Miura Y (1982). "Effect of 2,4-dichlorophenoxyacetic acid on glucosylation of scopoletin to scopolin in tobacco tissue-culture". Plant Physiol. 69 (4): 810–813. doi:10.1104/pp.69.4.810. PMC 426310. PMID 16662301.
• Betry, P.; Fliniaux, M.A.; Mackova, M.; Gillet, F.; Macek, T.; Jacquin-Dubreuil, A. (1995). "Scopoletin-glucosyltransferase Activity from Duboisia myoporoides; Improvement of Cultivation Conditions and Crude Extract Preparation Procedure". Journal of Plant Physiology. 146 (4): 503–507. doi:10.1016/S0176-1617(11)82015-8. ISSN 0176-1617.