ID   2.4.1.184
DE   galactolipid galactosyltransferase.
AN   DGDG synthase.
AN   digalactosyldiacylglycerol synthase.
AN   galactolipid-galactolipid galactosyltransferase.
AN   GGGT.
AN   interlipid galactosyltransferase.
CA   2 a 1,2-diacyl-3-O-(beta-D-galactosyl)-sn-glycerol = a 1,2-diacyl-3-
CA   O-[beta-D-galactosyl-(1->6)-beta-D-galactosyl]-sn-glycerol + a 1,2-
CA   diacyl-sn-glycerol.
CC   -!- The enzyme converts monogalactosyldiacylglycerol to
CC       digalactosyldiacylglycerol, trigalactosyldiacylglycerol and
CC       tetragalactosyldiacylglycerol.
CC   -!- All residues are connected by beta linkages.
CC   -!- The activity is localized to chloroplast envelope membranes, but it
CC       does not contribute to net galactolipid synthesis in plants, which is
CC       performed by EC 2.4.1.46 and EC 2.4.1.241.
CC   -!- Note that the beta,beta-digalactosyldiacylglycerol formed by this
CC       enzyme is different from the more common alpha,beta-
CC       digalactosyldiacylglycerol formed by EC 2.4.1.241.
CC   -!- The enzyme provides an important mechanism for the stabilization of
CC       the chloroplast membranes during freezing and drought stress.
DR   Q93Y07, SFR2_ARATH ;  Q8L6H7, SFR2_ORYSJ ;
//