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Dobrenel T, Marchive C, Azzopardi M, Clément G, Moreau M, Sormani R, Robaglia C, Meyer C. Sugar metabolism and the plant target of rapamycin kinase: a sweet operaTOR? FRONTIERS IN PLANT SCIENCE 2013; 4:93. [PMID: 23641244 PMCID: PMC3640205 DOI: 10.3389/fpls.2013.00093] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 03/27/2013] [Indexed: 05/18/2023]
Abstract
In eukaryotes, the ubiquitous TOR (target of rapamycin) kinase complexes have emerged as central regulators of cell growth and metabolism. The plant TOR complex 1 (TORC1), that contains evolutionary conserved protein partners, has been shown to be implicated in various aspects of C metabolism. Indeed Arabidopsis lines affected in the expression of TORC1 components show profound perturbations in the metabolism of several sugars, including sucrose, starch, and raffinose. Metabolite profiling experiments coupled to transcriptomic analyses of lines affected in TORC1 expression also reveal a wider deregulation of primary metabolism. Moreover recent data suggest that the kinase activity of TORC1, which controls biological outputs like mRNA translation or autophagy, is directly regulated by soluble sugars.
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Affiliation(s)
- Thomas Dobrenel
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
| | - Chloé Marchive
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
| | - Marianne Azzopardi
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
| | - Gilles Clément
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
| | - Manon Moreau
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
- Laboratoire de Génétique et Biophysique des Plantes, UMR7265, DSV, IBEB, SBVME, CEA, CNRS, Faculté des Sciences de Luminy, Aix Marseille UniversitéMarseille, France
| | - Rodnay Sormani
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
| | - Christophe Robaglia
- Laboratoire de Génétique et Biophysique des Plantes, UMR7265, DSV, IBEB, SBVME, CEA, CNRS, Faculté des Sciences de Luminy, Aix Marseille UniversitéMarseille, France
| | - Christian Meyer
- Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Saclay Plant SciencesVersailles, France
- *Correspondence: Christian Meyer, Institut Jean-Pierre Bourgin, UMR 1318 INRA AgroParisTech, Institut National de la Recherche Agronomique Versailles, 78026 Versailles Cedex, France. e-mail:
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