Flavanone 7-O-beta-glucosyltransferase () is an enzyme that catalyzes the chemical reaction
The two substrates of this enzyme are UDP-glucose and a flavanone. Its products are UDP and the corresponding flavanone 7-O-beta-D-glucoside.
This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-glucose:flavanone 7-O-beta-D-glucosyltransferase. Other names in common use include uridine diphosphoglucose-flavanone 7-O-glucosyltransferase, naringenin 7-O-glucosyltransferase, and hesperetin 7-O-glucosyl-transferase.
An example of this reaction in flavonoid biosynthesis is the conversion of naringenin to prunin:
In some citrus fruits, the product prunin is converted to naringin, a compound which is responsible for the bitter taste of grapefruit.