Abstract: Uridine diphosphate (UDP) glycosyltransferases (UGTs) catalyze the transfer of glycosyl residues from activated nucleotide sugars to a wide range of acceptor molecules ( aglycones) , thus regulating properties of the acceptors, such as bioactivity, solubility and transport within the cell and throughout the organism. Glycosylation is a widesp read modification in grape secondarymetabolism pathway. It is involved in various functions, including the biosynthesis and storage of secondary compounds. Here, we highlight recent progress in biochemistry and molecular biology characteristics of UGTs in grape secondary metabolism pathway. The prospect for further research of these glycosyltransferases was also discussed.

Key words: grape, secondary metabolism, uridine diphosphate glycosyltransferases (UGTs), biochemistry and molecular biology