title: The role of plant mitochondria in the biosynthesis of coenzymes.
abstract: This last decade, many efforts were undertaken to understand how coenzymes, including vitamins, are synthesized in plants. Surprisingly, these metabolic pathways were often "quartered" between different compartments of the plant cell. Among these compartments, mitochondria often appear to have a key role, catalyzing one or several steps in these pathways. In the present review we will illustrate these new and important biosynthetic functions found in plant mitochondria by describing the most recent findings about the synthesis of two vitamins (folate and biotin) and one non-vitamin coenzyme (lipoate). The complexity of these metabolic routes raise intriguing questions, such as how the intermediate metabolites and the end-product coenzymes are exchanged between the various cellular territories, or what are the physiological reasons, if any, for such compartmentalization.
authors.affiliation: Institut de Recherches en Technologies et Sciences pour le Vivant, UMR5168 CEA/CNRS/INRA/Université Joseph Fourier Grenoble, CEA-Grenoble, 17 rue des Martyrs, Grenoble Cedex 9, 38054, France, frebeille@cea.fr
authors.forename: Fabrice
authors.initials: F
authors.lastname: Rébeillé
authors.forename: Claude
authors.initials: C
authors.lastname: Alban
authors.forename: Jacques
authors.initials: J
authors.lastname: Bourguignon
authors.forename: Stéphane
authors.initials: S
authors.lastname: Ravanel
authors.forename: Roland
authors.initials: R
authors.lastname: Douce
mesh_terms: D001710:Biotin / Q000096:biosynthesis*; D003600:Cytosol / Q000378:metabolism; D005227:Fatty Acids / Q000096:biosynthesis; D005492:Folic Acid / Q000096:biosynthesis* / Q000737:chemistry; D008928:Mitochondria / Q000378:metabolism*; D010944:Plants / Q000378:metabolism*; D013763:Tetrahydrofolates / Q000096:biosynthesis; D008063:Thioctic Acid / Q000096:biosynthesis* / Q000737:chemistry
chemical_list: D005227:Fatty Acids; D013763:Tetrahydrofolates; C030371:5,6,7,8-tetrahydrofolic acid; D001710:Biotin; D008063:Thioctic Acid; D005492:Folic Acid