Taxonomic group: plant / Streptophyta
(Phylum: Streptophyta)
Organ / tissue: leaf
Publication DOI: 10.1105/tpc.7.11.1801Journal NLM ID: 9208688Publisher: Rockville, MD: American Society of Plant Physiologists
Institutions: Institut für Genbiologische Forschung Berlin GmbH, Germany
The galactolipids monogalactosyl and digalactosyl diacylglycerol occur in all higher plants and are the predominant lipid components of chloroplast membranes. They are thought to be of major importance to chloroplast morphology and physiology, although direct experimental evidence is still lacking. The enzymes responsible for final assembly of galactolipids are associated with the envelope membranes of plastids, and their biochemical analysis has been notoriously difficult. Therefore, we have chosen a genetic approach to study the biosynthesis and function of galactolipids in higher plants. We isolated a mutant of Arabidopsis that is deficient in digalactosyl diacylglycerol by directly screening a mutagenized M2 population for individuals with altered leaf lipid composition. This mutant carries a recessive nuclear mutation at a single locus designated dgd1. Backcrossed mutants show stunted growth, pale green leaf color, reduced photosynthetic capability, and altered thylakoid membrane ultrastructure.
Structure type: oligomer
Location inside paper: Table 2
Trivial name: DGDG
Contained glycoepitopes: IEDB_134624,IEDB_136044,IEDB_136906,IEDB_137472,IEDB_141794,IEDB_151528,IEDB_190606,IEDB_742248,SB_163,SB_165,SB_166,SB_187,SB_195,SB_7,SB_88
Methods: TLC, GC, TEM, genetic manipulations, radioactive labeling
Comments, role: In wild-type Arabidopsis, monogalactosyldiacylglycerol (MGDG) contains high amounts of 16:3 and 18:3 fatty acids, whereas digalactosyldiacylglycerol (DGDG) contains mostly 16:0 and 18:3 fatty acids.
Related record ID(s): 61035
NCBI Taxonomy refs (TaxIDs): 3702
Show glycosyltransferases
There is only one chemically distinct structure:
Found 
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