Reaction: UDP-α-D-glucose + a 1,2-diacyl-sn-glycerol = UDP + a 1,2-diacyl-3-O-(β-D-glucopyranosyl)-sn-glycerol
Glossary: a 1,2-diacyl-3-O-(β-D-glucopyranosyl)-sn-glycerol = a β-monoglucosyldiacylglycerol = a GlcDG
Other name(s): mgdA (gene name)
Systematic name: UDP-α-D-glucose:1,2-diacyl-sn-glycerol 3-β-D-glucosyltransferase
Comments: The enzymes from cyanobacteria are involved in the biosynthesis of galactolipids found in their photosynthetic membranes. The enzyme belongs to the GT2 family of configuration-inverting glycosyltranferases . cf. EC 220.127.116.117, 1,2-diacylglycerol 3-α-glucosyltransferase.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number:
1. Sato, N. and Murata, N. Lipid biosynthesis in the blue-green-alga (cyanobacterium), Anabaena variabilis. 3. UDP-glucose-diacylglycerol glucosyltransferase activity in vitro. Plant Cell Physiol. 23 (1982) 1115-1120.
2. Awai, K., Kakimoto, T., Awai, C., Kaneko, T., Nakamura, Y., Takamiya, K., Wada, H. and Ohta, H. Comparative genomic analysis revealed a gene for monoglucosyldiacylglycerol synthase, an enzyme for photosynthetic membrane lipid synthesis in cyanobacteria. Plant Physiol. 141 (2006) 1120-1127. [PMID: 16714404]
3. Yuzawa, Y., Shimojima, M., Sato, R., Mizusawa, N., Ikeda, K., Suzuki, M., Iwai, M., Hori, K., Wada, H., Masuda, S. and Ohta, H. Cyanobacterial monogalactosyldiacylglycerol-synthesis pathway is involved in normal unsaturation of galactolipids and low-temperature adaptation of Synechocystis sp. PCC 6803. Biochim. Biophys. Acta 1841 (2014) 475-483. [PMID: 24370445]