LIPID MAPS® Gene/Proteome Database (LMPD)

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LMPD Record

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LMP010632

UniProt Annotations

Entry Information
Gene NameMonogalactosyldiacylglycerol synthase 1
Protein EntryMGDG1_ARATH
UniProt IDO81770
SpeciesArabidopsis
Comments
Comment typeDescription
Alternative ProductsEvent=Alternative splicing; Named isoforms=2; Name=1; IsoId=O81770-1; Sequence=Displayed; Name=2; IsoId=O81770-2; Sequence=VSP_035387, VSP_035388; Note=Derived from EST data. No experimental confirmation available.;
Biophysicochemical PropertiespH dependence: Optimum pH is 7.5.;
Catalytic ActivityUDP-alpha-D-galactose + 1,2-diacyl-sn-glycerol = UDP + 3-beta-D-galactosyl-1,2-diacyl-sn-glycerol.
Developmental StageHighly expressed throughout whole developmental stages. Transient increase in embryos at the globular stage. {ECO:0000269|PubMed:11553816, ECO:0000269|PubMed:17940034}.
Disruption PhenotypePlants show defects in chloroplast biogenesis and a dwarf and albino phenotype. The amount of monogalactosyldiacylglycerol was reduced by 98% in the mutant leaves, indicating that MGD2/MGD3 cannot compensate for loss of MGD1 function. {ECO:0000269|PubMed:10869420}.
FunctionInvolved in the synthesis of the major structural component of photosynthetic membranes. Required for proper thylakoid membrane biogenesis. Does not discriminate between prokaryotic (18:1/16:0) or eukaryotic (18:2/18:2) 1,2- diacylglycerol species, but operates with some preference for the prokaryotic one. {ECO:0000269|PubMed:10869420, ECO:0000269|PubMed:11171188, ECO:0000269|PubMed:11553816, ECO:0000269|PubMed:17940034}.
InductionInduced by illumination and cytokinin treatment in etiolated seedlings. Not induced by phosphate deprivation. {ECO:0000269|PubMed:11553816, ECO:0000269|PubMed:14730084}.
SimilarityBelongs to the glycosyltransferase 28 family. {ECO:0000305}.
Subcellular LocationPlastid, chloroplast inner membrane {ECO:0000305|PubMed:11171188, ECO:0000305|PubMed:11553816}.
SubunitHomodimer. {ECO:0000250}.
Tissue SpecificityExpressed in roots, stems, leaves, flowers, siliques and seeds. {ECO:0000269|PubMed:11171188, ECO:0000269|PubMed:11553816, ECO:0000269|PubMed:14730084}.