Redox Modulation of Cyclic Electron Flow around Photosystem I in C3 Plants †
| Autor: | Pierre Joliot, Giles N. Johnson, Beena Nandha, Giovanni Finazzi, Cécile Breyton |
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| Přispěvatelé: | Institut de biologie structurale (IBS - UMR 5075 ), Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Physiologie membranaire et moléculaire du chloroplaste (PMMC), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Collège de France (CdF (institution)), Physico-chimie moléculaire des membranes biologiques (PCMMB), Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Institut de biologie structurale (IBS - UMR 5075), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC), Physiologie cellulaire et végétale (LPCV), Institut National de la Recherche Agronomique (INRA)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA)-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Centre National de la Recherche Scientifique (CNRS)-Université Paris Diderot - Paris 7 (UPD7), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
Chlorophyll
0106 biological sciences Photosynthetic reaction centre MESH: Oxidation-Reduction MESH: Photosystem I Protein Complex Photosystem II Photochemistry Photosystem I Thylakoids 01 natural sciences Biochemistry Electron Transport 03 medical and health sciences MESH: Thylakoids Spinacia oleracea Light-dependent reactions MESH: Electron Transport 030304 developmental biology Photosystem 0303 health sciences P700 Photosystem I Protein Complex biology [SDV.BBM.BS]Life Sciences [q-bio]/Biochemistry Molecular Biology/Structural Biology [q-bio.BM] Chemistry Cytochrome b6f complex MESH: Spinacia oleracea MESH: Cytochrome b6f Complex food and beverages biology.organism_classification Adaptation Physiological MESH: Adaptation Physiological Plant Leaves MESH: Plant Leaves [SDV.BBM.BS]Life Sciences [q-bio]/Biochemistry Molecular Biology/Biomolecules [q-bio.BM] Cytochrome b6f Complex Spinach Oxidation-Reduction MESH: Chlorophyll 010606 plant biology & botany |
| Zdroj: | Biochemistry Biochemistry, 2006, 45 (45), pp.13465-13475. ⟨10.1021/bi061439s⟩ Biochemistry, American Chemical Society, 2006, 45, pp.13465-13475 Biochemistry, American Chemical Society, 2006, 45 (45), pp.13465-13475. ⟨10.1021/bi061439s⟩ |
| ISSN: | 0006-2960 1520-4995 |
| DOI: | 10.1021/bi061439s⟩ |
| Popis: | International audience; We have investigated the occurrence of cyclic electron flow in intact spinach leaves. In particular, we have tested the hypothesis that cyclic flow requires the presence of supercomplexes in the thylakoid membrane or other strong associations between proteins. Using biochemical approaches, we found no evidence of the presence of supercomplexes related to cyclic electron flow, making previous structural explanations for the modulation of cyclic flow rather unlikely. On the other hand, we found that the fraction of photosystem I complexes engaged in cyclic flow could be modulated by changes in the redox state of the chloroplast stroma. Our findings support therefore a dynamic model for the occurrence of linear and cyclic electron flow in C3 plants, based on the competition between cytochrome b(6)f and FNR for electrons carried by ferredoxin. This would be ultimately regulated by the balance between the redox state of PSI acceptors and donors during photosynthesis, in a diffusing system. |
| Databáze: | OpenAIRE |
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