Redox regulation of PGRL1 at the onset of low light intensity
| Autor: | Inbal Dangoor, Vivekanand Tiwari, Tal Isaacson, Bat-Chen Wolf, Avihai Danon, Sapir Mufkadi |
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| Rok vydání: | 2020 |
| Předmět: |
Chlorophyll
0106 biological sciences 0301 basic medicine Light Arabidopsis Electrophoretic Mobility Shift Assay Plant Science Oxidative phosphorylation Biology Photosystem I Photosynthesis 01 natural sciences Redox 03 medical and health sciences Genetics Quenching (fluorescence) Arabidopsis Proteins Non-photochemical quenching Membrane Proteins Cell Biology Oxidative Regulation Light intensity 030104 developmental biology Biophysics Oxidation-Reduction 010606 plant biology & botany |
| Zdroj: | The Plant Journal. 103:715-725 |
| ISSN: | 1365-313X 0960-7412 |
| Popis: | PGR5-LIKE PHOTOSYNTHETIC PHENOTYPE1 (PGRL1) regulates photosystem I cyclic electron flow which transiently activates non-photochemical quenching at the onset of light. Here, we show that a disulfide-based mechanism of PGRL1 regulated this process in vivo at the onset of low light levels. We found that PGRL1 regulation depended on active formation of key regulatory disulfides in the dark, and that PGR5 was required for this activity. The disulfide state of PGRL1 was modulated in plants by counteracting reductive and oxidative components and reached a balanced state that depended on the light level. We propose that the redox regulation of PGRL1 fine-tunes a timely activation of photosynthesis at the onset of low light. |
| Databáze: | OpenAIRE |
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