Interaction of COP1 and UVR8 regulates UV-B-induced photomorphogenesis and stress acclimation in Arabidopsis
| Autor: | Catherine Cloix, Jean-Jacques Favory, Markus Funk, Attila Oravecz, Agnieszka Stec, Harald K. Seidlitz, Roman Ulm, Edward J. Oakeley, Henriette Gruber, Andreas Albert, Gareth I. Jenkins, Luca Rizzini, Ferenc Nagy |
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| Rok vydání: | 2008 |
| Předmět: |
UVR8
Chromosomal Proteins Non-Histone Ultraviolet Rays Acclimatization Ubiquitin-Protein Ligases Mutant Arabidopsis General Biochemistry Genetics and Molecular Biology Article Gene Expression Regulation Plant Stress Physiological Arabidopsis/physiology Molecular Biology Chromosomal Proteins Non-Histone/genetics/physiology Regulation of gene expression Genetics Hypocotyl/growth & development/physiology General Immunology and Microbiology biology Signal Transduction/physiology Arabidopsis Proteins General Neuroscience fungi Wild type biology.organism_classification Hypocotyl Ubiquitin ligase Cell biology Arabidopsis Proteins/genetics/physiology Mutation biology.protein Sunlight Photomorphogenesis Signal transduction Protein Binding Signal Transduction |
| Zdroj: | EMBO Journal, Vol. 28, No 5 (2009) pp. 591-601 Favory, J-J, Stec, A, Gruber, H, Rizzini, L, Oravecz, A, Funk, M, Albert, A, Cloix, C, Jenkins, G I, Oakeley, E J, Seidlitz, H K, Nagy, F & Ulm, R 2009, ' Interaction of COP1 and UVR8 regulates UV-B-induced photomorphogenesis and stress acclimation in Arabidopsis ', EMBO Journal, vol. 28, no. 5, pp. 591-601 . https://doi.org/10.1038/emboj.2009.4 |
| ISSN: | 1460-2075 0261-4189 |
| DOI: | 10.1038/emboj.2009.4 |
| Popis: | The ultraviolet-B (UV-B) portion of the solar radiation functions as an environmental signal for which plants have evolved specific and sensitive UV-B perception systems. The UV-B-specific UV RESPONSE LOCUS 8 (UVR8) and the multifunctional E3 ubiquitin ligase CONSTITUTIVELY PHOTOMORPHOGENIC 1 (COP1) are key regulators of the UV-B response. We show here that uvr8-null mutants are deficient in UV-B-induced photomorphogenesis and hypersensitive to UV-B stress, whereas overexpression of UVR8 results in enhanced UV-B photomorphogenesis, acclimation and tolerance to UV-B stress. By using sun simulators, we provide evidence at the physiological level that UV-B acclimation mediated by the UV-B-specific photoregulatory pathway is indeed required for survival in sunlight. At the molecular level, we demonstrate that the wild type but not the mutant UVR8 and COP1 proteins directly interact in a UV-B-dependent, rapid manner in planta. These data collectively suggest that UV-B-specific interaction of COP1 and UVR8 in the nucleus is a very early step in signalling and responsible for the plant's coordinated response to UV-B ensuring UV-B acclimation and protection in the natural environment. |
| Databáze: | OpenAIRE |
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