Hydroxymandelonitrile glucosyltransferase (EC 2.4.1.178) is an enzyme that catalyzes the chemical reaction
The two substrates of this enzyme characterised from Triglochin maritima are 4-hydroxymandelonitrile and UDP-glucose. Its products are taxiphillin and uridine diphosphate (UDP). The enzyme is related to (R)-mandelonitrile β-glucosyltransferase (EC 2.4.1.354), which produces prunasin from mandelonitrile. These products are both cyanogenic glucosides. This enzyme belongs to the family of glycosyltransferases, specifically the hexosyltransferases. The systematic name of this enzyme class is UDP-glucose:4-hydroxymandelonitrile glucosyltransferase. Other names in common use include cyanohydrin glucosyltransferase, and uridine diphosphoglucose-cyanohydrin glucosyltransferase.
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