Gallate 1-beta-glucosyltransferase uses
UDP-glucose and
gallate to produce
UDP and
1-galloyl-β-D-glucose.
Beta-glucogallin O-galloyltransferase uses
1-O-galloyl-β-D-glucose to produce
D-glucose and
1-O,6-O-digalloyl-β-D-glucose.
Beta-glucogallin-tetrakisgalloylglucose O-galloyltransferase uses
1-O-galloyl-β-D-glucose and
1,2,3,6-tetrakis-O-galloyl-β-D-glucose to produce
D-glucose and
1,2,3,4,6-pentakis-O-galloyl-β-D-glucose (1,2,3,4,6-penta-O-galloyl-β-D-glucose, the common precursor of gallotannins and the related ellagitannins).
Tannase is a key enzyme in the degradation of gallotannins that uses
digallic acid and H2O to produce
gallic acid. ==See also==