Ellagitannin biosynthesis: oxidation of pentagalloylglucose to tellimagrandin II by an enzyme from Tellima grandiflora leaves

Abstract

First evidence of the in vitro oxidation of 1,2,3,4,6-pentagalloylglucose to the ellagitannins, tellimagrandin II and 1,4,6-tri-O-galloyl-2,3-O-hexahydroxydiphenoyl-β- D-glucose, has been obtained with a partially purified enzyme from leaves of Tellima grandiflora (fringe cups, Saxifragaceae).