Contribution of negatively charged lipids to the architecture and interaction of photosynthetic membranes
Thylakoid membranes, the universal structure where photosynthesis takes place in all oxygenic photosynthetic organisms from cyanobacteria to higher plants, have a unique lipid composition. They contain a high fraction of two uncharged glycolipids, namely the galactoglycerolipids, i.e. mono- and di-galactosyldiacylglycerol (respectively MGDG and DGDG) and an anionic sulfolipid, i.e. sulfoquinovosyldiacylglycerol (SQDG). A remarkable feature of the evolution from cyanobacteria to higher plants is the conservation of MGDG, DGDG, SQDG and phosphatidylglycerol (PG), the major phospholipid of thylakoids. In previous studies [experiments 8-02-585 and 8-02-645], we showed that galactolipid bilayers differ from phospholipids in exhibiting shorter separation distances favoring the regular stacking of bilayers. We are now interested in the role of the anionic lipids SQDG and PG in this unusual lipid environment.
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BOLIK Stephanie; DEME Bruno; DERAGON Etienne; JOUHET Juliette and SCHNECK Emanuel. (2019). Contribution of negatively charged lipids to the architecture and interaction of photosynthetic membranes. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.8-02-878
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