The CONSTANS flowering complex controls the protective response of photosynthesis in the green alga Chlamydomonas
| Autor: | Tomohito Yamasaki, Jun Minagawa, Konomi Fujimura-Kamada, Takuya Matsuo, Ryutaro Tokutsu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Transcription Genetic Ubiquitin-Protein Ligases Science Mutant General Physics and Astronomy Chlamydomonas reinhardtii Photosynthesis 01 natural sciences General Biochemistry Genetics and Molecular Biology Article 03 medical and health sciences Transcription (biology) Light responses lcsh:Science Promoter Regions Genetic Transcription factor Multidisciplinary biology Chemistry Chlamydomonas fungi Algal Proteins General Chemistry biology.organism_classification Ubiquitin ligase Cell biology 030104 developmental biology biology.protein Non-photochemical quenching lcsh:Q Signal transduction 010606 plant biology & botany Protein Binding Signal Transduction |
| Zdroj: | Nature Communications, Vol 10, Iss 1, Pp 1-10 (2019) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | Light is essential for photosynthesis, but the amounts of light that exceed an organism’s assimilation capacity can result in oxidative stress and even cell death. Plants and microalgae have developed a photoprotective response mechanism, qE, that dissipates excess light energy as thermal energy. In the green alga Chlamydomonas reinhardtii, qE is regulated by light-inducible photoprotective proteins, but the pathway from light perception to qE is not fully understood. Here, we show that the transcription factors CONSTANS and Nuclear transcription Factor Ys (NF-Ys) form a complex that governs light-dependent photoprotective responses in C. reinhardtii. The qE responses do not occur in CONSTANS or NF-Y mutants. The signal from light perception to the CONSTANS/NF-Ys complex is directly inhibited by the SPA1/COP1-dependent E3 ubiquitin ligase. This negative regulation mediated by the E3 ubiquitin ligase and the CONSTANS/NF-Ys complex is common to photoprotective response in algal photosynthesis and flowering in plants. In flowering plants, the CONSTANS (CO) and Nuclear Factor Y (NF-Y) transcription factors connect light perception to floral induction. Here Tokutsu et al. show that in the green alga Chlamydomonas, CO and NF-Y form an analogous complex that can prevent photodamage in response to excess light. |
| Databáze: | OpenAIRE |
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