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Besagni, Celine
Résultat de la recherche
Dual targeting of a mature plastoglobulin/fibrillin fusion protein to chloroplast plastoglobules and thylakoids in transplastomic tobacco plants
2013, Shanmugabalaji, Venkatasalam, Besagni, Celine, Eugeni Piller, Lucia, Douet, Véronique, Ruf, Stephanie, Bock, Ralph, Kessler, Félix
Plastid lipid droplets at the crossroads of prenylquinone metabolism
2012, Eugeni Piller, Lucia, Abraham, Marion, Dörmann, Peter, Kessler, Félix, Besagni, Celine
Chloroplast lipid droplet type II NAD(P)H quinone oxidoreductase is essential for prenylquinone metabolism and vitamin K1 accumulation
2011, Eugeni Piller, Lucia, Besagni, Celine, Ksas, Brigitte, Rumeau, Dominique, Bréhélin, Claire, Glauser, Gaëtan, Kessler, Félix, Havaux, Michel
Lipid droplets are ubiquitous cellular structures in eukaryotes and are required for lipid metabolism. Little is currently known about plant lipid droplets other than oil bodies. Here, we define dual roles for chloroplast lipid droplets (plastoglobules) in energy and prenylquinone metabolism. The prenylquinones?plastoquinone, plastochromanol-8, phylloquinone (vitamin K1), and tocopherol (vitamin E)?are partly stored in plastoglobules. This work shows that NAD(P)H dehydrogenase C1 (NDC1) (At5g08740), a type II NAD(P)H quinone oxidoreductase, associates with plastoglobules. NDC1 reduces a plastoquinone analog in vitro and affects the overall redox state of the total plastoquinone pool in vivo by reducing the plastoquinone reservoir of plastoglobules. Finally, NDC1 is required for normal plastochromanol-8 accumulation and is essential for vitamin K1 production.