Physiological functions of malate shuttles in plants and algae
Résumé
The malate shuttle, as a valve for photosynthetic electron dissipation, has been proposed for >50 years, but only recently has this function been clearly demonstrated.
The plastidial NAD-MDH is essential for embryogenesis and chloroplast development. This role is not due to its enzymatic activity but rather to its ability to stabilize a large AAA-ATPase complex at the inner envelope. The plNAD-MDH is therefore a moonlighting protein.
The malate shuttle connects fatty acid biosynthesis in the chloroplast to mitochondrial reactive oxygen species (ROS) production and to programmed cell death in plants.
The malate shuttle connects fatty acid catabolism in the peroxisome to photosynthesis and chloroplast metabolism in algae.
Expression of malate shuttle components is responsive to CO2 levels. The latest results indicate its critical role in plant photorespiration and points to a possible role in the algal CO2-concentrating mechanism.
Domaines
Sciences du Vivant [q-bio]
Fichier principal
1. Dao et al annotated_revised clean version for hal.pdf (1.38 Mo)
Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)