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The ancestral symbiont sensor kinase CSK links photosynthesis with gene expression in chloroplasts
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Puthiyaveetil, Sujith, Kavanagh, T. Anthony, Cain, Peter, Life scientist, Sullivan, James A., Newell, Christine A., Gray, John C., Robinson, Colin, Van der Giezen, Mark, Rogers, Matthew B. and Allen, John F. (2008) The ancestral symbiont sensor kinase CSK links photosynthesis with gene expression in chloroplasts. Proceedings of the National Academy of Sciences of the United States of America, Volume 105 (Number 29). pp. 10061-10066. doi:10.1073/pnas.0803928105 ISSN 0027-8424.
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Official URL: http://dx.doi.org/10.1073/pnas.0803928105
Abstract
We describe a novel, typically prokaryotic, sensor kinase in chloroplasts of green plants. The gene for this chloroplast sensor kinase (CSK) is found in cyanobacteria, prokaryotes from which chloroplasts evolved. The CSK gene has moved, during evolution, from the ancestral chloroplast to the nuclear genomes of eukaryotic algae and green plants. The CSK protein is now synthesised in the cytosol of photosynthetic eukaryotes and imported into their chloroplasts as a protein precursor. In the model higher plant Arabidopsis thaliana, CSK is autophosphorylated and required for control of transcription of chloroplast genes by the redox state of an electron carrier connecting photosystems I and II. CSK therefore provides a redox regulatory mechanism that couples photosynthesis to gene expression. This mechanism is inherited directly from the cyanobacterial ancestor of chloroplasts, is intrinsic to chloroplasts, and is targeted to chloroplast genes.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QH Natural history > QH426 Genetics Q Science > QK Botany Q Science > QP Physiology |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Biological Sciences ( -2010) | ||||
| Library of Congress Subject Headings (LCSH): | Chloroplasts, Protein kinases, Gene expression, Transcription factors, Cells -- Evolution, Photosynthesis -- Genetic aspects, Arabidopsis thaliana -- Genetics | ||||
| Journal or Publication Title: | Proceedings of the National Academy of Sciences of the United States of America | ||||
| Publisher: | National Academy of Sciences | ||||
| ISSN: | 0027-8424 | ||||
| Official Date: | 22 July 2008 | ||||
| Dates: |
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| Volume: | Volume 105 | ||||
| Number: | Number 29 | ||||
| Number of Pages: | 6 | ||||
| Page Range: | pp. 10061-10066 | ||||
| DOI: | 10.1073/pnas.0803928105 | ||||
| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Funder: | Queen Mary and Westfield College (University of London), Royal Society (Great Britain), Wellcome Trust (London, England) |
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