作者: Dimitris Petroutsos , Souad Amiar , Heni Abida , Lina-Juana Dolch , Olivier Bastien
DOI: 10.1016/J.PLIPRES.2014.02.001
关键词:
摘要: Photosynthetic membranes have a unique lipid composition that has been remarkably well conserved from cyanobacteria to chloroplasts. These are characterized by very high content in galactoglycerolipids, i.e., mono- and digalactosyldiacylglycerol (MGDG DGDG, respectively). Galactoglycerolipids make up the bulk of matrix which photosynthetic complexes embedded. They also known fulfill specific functions, such as stabilizing photosystems, being source polyunsaturated fatty acids for various purposes and, some eukaryotes, exported other subcellular compartments. The conservation MGDG DGDG suggests selection pressures might enzymes involved their biosynthesis, but this does not appear be case. Important evolutionary transitions comprise primary endosymbiosis (from symbiotic cyanobacterium chloroplast) secondary unicellular algal eukaryote plastid). In review, we compare biosynthetic pathways based on available molecular biochemical data, highlighting enzymatic reactions others diverged or lost, emergence parallel alternative systems originating metabolic pathways. Questions future research highlighted.