In enzymology, a 2-coumarate O-beta-glucosyltransferase (EC 2.4.1.114) is an enzyme that catalyzes the chemical reaction

UDP-glucose + trans-2-hydroxycinnamate ${\displaystyle \rightleftharpoons }$ UDP + trans-beta-D-glucosyl-2-hydroxycinnamate

Thus, the two substrates of this enzyme are UDP-glucose and trans-2-hydroxycinnamate, whereas its two products are UDP and trans-beta-D-glucosyl-2-hydroxycinnamate.

This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-glucose:trans-2-hydroxycinnamate O-beta-D-glucosyltransferase. Other names in common use include uridine diphosphoglucose-o-coumarate glucosyltransferase, and UDPG:o-coumaric acid O-glucosyltransferase. This enzyme participates in phenylpropanoid biosynthesis.

• Kleinhofs A, Haskins FA, Gorz HJ (1967). "trans-o-Hydroxylcinnamic acid glucosylation in cell-free extracts of Melilotus alba". Phytochemistry. 6 (10): 1313–1318. doi:10.1016/S0031-9422(00)82872-1.
• Poulton JE, McRee BE, Conn EE (1980). "Intracellular localization of two enzymes involved in coumarin biosynthesis in Melilotus alba". Plant Physiol. 65 (2): 171–175. doi:10.1104/pp.65.2.171. PMC 440292. PMID 16661155.