Galaktolipid galaktoziltransferaza

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Galaktolipid galaktoziltransferaza
EC broj
CAS broj 66676-74-2
IntEnz IntEnz view
ExPASy NiceZyme view
MetaCyc metabolic pathway
PRIAM profile
PDB structures

Galaktolipid galaktoziltransferaza (EC, galaktolipid-galaktolipid galaktoziltransferaza, galaktolipid:galaktolipid galaktoziltransferaza, interlipidna galaktoziltransferaza, GGGT, DGDG sintaza, digalaktozildiacilglicerolna sintaza, 3-(beta-D-galaktozil)-1,2-diacil-sn-glicerol:mono-3-(beta-D-galaktozil)-1,2-diacil-sn-glicerol beta-D-galaktoziltransferaza) je enzim sa sistematskim imenom 3-(beta-D-galaktozil)-1,2-diacil-sn-glicerol:3-(beta-D-galaktozil)-1,2-diacil-sn-glicerol beta-D-galaktoziltransferaza.[1][2][3][4][5] Ovaj enzim katalizuje sledeću hemijsku reakciju

2 3-(beta-D-galaktozil)-1,2-diacil-sn-glicerol \rightleftharpoons 3-[alfa-D-galaktozil-(1->6)-beta-D-galaktozil]-1,2-diacil-sn-glicerol + 1,2-diacil-sn-glicerol

Daljim transferima galaktozilnih ostataka na digalaktozildiacilglicerol, trigalaktozildiacilglicerol i tetragalaktozildiacilglicerol se takođe formiraju.


  1. Dorne, A.-J., Block, M.A., Joyard, J. and Douce, R. (1982). „The galactolipid-galactolipid galactosyltransferase is located on the outer surface of the outer-membrane of the chloroplast envelope”. FEBS Lett. 145: 30-34 
  2. Heemskerk, J.W.M., Wintermans, J.F.G.M., Joyard, J., Block, M.A., Dorne, A.-J. and Douce, R. (1986). „Localization of galactolipid:galactolipid galactosyltransferase and acyltransferase in outer envelope membrane of spinach chloroplasts”. Biochim. Biophys. Acta 877: 281-289 
  3. Heemskerk, J.W.M., Jacobs, F.H.H. and Wintermans, J.F.G.M. (1988). „UDPgalactose-independent synthesis of monogalactosyldiacylglycerol. An enzymatic activity of the spinach chloroplast envelope”. Biochim. Biophys. Acta 961: 38-47 
  4. Kelly, A.A., Froehlich, J.E. and Dörmann, P. (2003). „Disruption of the two digalactosyldiacylglycerol synthase genes DGD1 and DGD2 in Arabidopsis reveals the existence of an additional enzyme of galactolipid synthesis”. Plant Cell 15: 2694-2706. PMID 14600212 
  5. Benning, C. and Ohta, H. (2005). „Three enzyme systems for galactoglycerolipid biosynthesis are coordinately regulated in plants”. J. Biol. Chem. 280: 2397-2400. PMID 15590685 


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