The biosynthetic capacities of the plastids and integration between cytoplasmic and chloroplast processes.

Norbert Rolland (1, 2) , Gilles Curien (1, 2) , Giovanni Finazzi (1, 2) , Marcel Kuntz (2, 1) , Eric Maréchal (1, 2) , Michel Matringe (1, 2) , Stéphane Ravanel (1, 2) , Daphné Seigneurin-Berny (1, 2)

1 BIG - Institut de Biosciences et de Biotechnologies de Grenoble (ex-IRTSV)
2 LPCV - Laboratoire de physiologie cellulaire végétale

Plastids are semiautonomous organelles derived from cyanobacterial ancestors. Following endosymbiosis, plastids have evolved to optimize their functions, thereby limiting metabolic redundancy with other cell compartments. Contemporary plastids have also recruited proteins produced by the nuclear genome of the host cell. In addition, many genes acquired from the cyanobacterial ancestor evolved to code for proteins that are targeted to cell compartments other than the plastid. Consequently, metabolic pathways are now a patchwork of enzymes of diverse origins, located in various cell compartments. Because of this, a wide range of metabolites and ions traffic between the plastids and other cell compartments. In this review, we provide a comprehensive analysis of the well-known, and of the as yet uncharacterized, chloroplast/cytosol exchange processes, which can be deduced from what is currently known about compartmentation of plant-cell metabolism.

Mots clés: plant; metabolism; cell compartment; plastid; chloroplast/cytosol exchange; envelope transporters; proteomics; review

Domaines: Biochimie, Biologie Moléculaire

Norbert Rolland, Gilles Curien, Giovanni Finazzi, Marcel Kuntz, Eric Maréchal, et al.. The biosynthetic capacities of the plastids and integration between cytoplasmic and chloroplast processes.. Annual Review of Genetics, 2012, 46, pp.233-64. ⟨10.1146/annurev-genet-110410-132544⟩. ⟨hal-00744117⟩