IUBMB Enzyme Nomenclature


Accepted name: monoglucosyldiacylglycerol epimerase

Reaction: a 1,2-diacyl-3-O-(β-D-glucopyranosyl)-sn-glycerol = a 1,2-diacyl-3-O-(β-D-galactopyranosyl)-sn-glycerol

Glossary: a 1,2-diacyl-3-O-(β-D-glucopyranosyl)-sn-glycerol = β-monoglucosyldiacylglycerol = GlcDG
a 1,2-diacyl-3-O-(β-D-galactopyranosyl)-sn-glycerol = β-monogalactosyldiacylglycerol = MGDG

Other name(s): glucolipid epimerase; mgdE (gene name)

Systematic name: 1,2-diacyl-3-O-(β-D-glucopyranosyl)-sn-glycerol 4-epimerase

Comments: The enzyme, characterized from cyanobacteria, is involves in the biosynthesis of galactolipids found in their photosynthetic membranes.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:


1. Sato, N. and Murata, N. Lipid biosynthesis in the blue-green alga, Anabaena variabilis II. Fatty acids and lipid molecular species. Biochim. Biophys. Acta 710 (1982) 279-289.

2. Awai, K., Ohta, H. and Sato, N. Oxygenic photosynthesis without galactolipids. Proc. Natl. Acad. Sci. USA 111 (2014) 13571-13575. [PMID: 25197079]

[EC created 2015]

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