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Chloroplast lipid droplet type II NAD(P)H quinone oxidoreductase is essential for prenylquinone metabolism and vitamin K1 accumulation
Auteur(s)
Eugeni Piller, Lucia
Ksas, Brigitte
Rumeau, Dominique
Bréhélin, Claire
Havaux, Michel
Date de parution
2011
In
Proceedings of the National Academy of Sciences
Vol.
34
No
108
De la page
14354
A la page
14359
Résumé
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.
Identifiants
Type de publication
journal article
