IUBMB Enzyme Nomenclature


Accepted name: (R)-mandelonitrile β-glucosyltransferase

Reaction: UDP-α-D-glucose + (R)-mandelonitrile = UDP + (R)-prunasin

Glossary: (R)-mandelonitrile = (2R)-hydroxy(phenyl)acetonitrile
(R)-prunasin = (2R)-(β-D-glucosyloxy)(phenyl)acetonitrile

Other name(s): UGT85A19 (gene name)

Systematic name: UDP-α-D-glucose:(R)-mandelonitrile β-D-glucosyltransferase (configuration-inverting)

Comments: The enzyme, characterized from Prunus dulcis (almond), is involved in the biosynthesis of the cyanogenic glycosides (R)-prunasin and (R)-amygdalin.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Franks, T. K., Yadollahi, A., Wirthensohn, M. G., Guerin, J. R., Kaiser, B. N., Sedgley, M. and Ford, C. M. A seed coat cyanohydrin glucosyltransferase is associated with bitterness in almond (Prunus dulcis) kernels. Funct. Plant Biol. 35 (2008) 236-246.

[EC created 2018]

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