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Photoperiodic control of the Arabidopsis proteome reveals a translational coincidence mechanism

View ORCID ProfileDaniel D Seaton, View ORCID ProfileAlexander Graf, View ORCID ProfileKatja Baerenfaller, View ORCID ProfileMark Stitt, View ORCID ProfileAndrew J. Millar, View ORCID ProfileWilhelm Gruissem
doi: https://doi.org/10.1101/182071
Daniel D Seaton
1SynthSys and School of Biological Sciences, C.H. Waddington Building, University of Edinburgh, Edinburgh EH9 3BF, Scotland, UK
5Current address: European Molecular Biology Laboratory, European Bioinformatics Institute, Wellcome Genome Campus, Hinxton, CB10 1SD, UK
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Alexander Graf
2Institute of Molecular Plant Biology, Department of Biology, ETH Zurich, Universitaetstrasse 2, 8092 Zurich, Switzerland
4Current address: Plant Proteomics Group, Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, 14476 Potsdam-Golm, Germany
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Katja Baerenfaller
2Institute of Molecular Plant Biology, Department of Biology, ETH Zurich, Universitaetstrasse 2, 8092 Zurich, Switzerland
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Mark Stitt
3System Regulation Group, Max Planck Institute of Molecular Plant Physiology, Am Muehlenberg 1, 14476 Potsdam-Golm, Germany
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Andrew J. Millar
1SynthSys and School of Biological Sciences, C.H. Waddington Building, University of Edinburgh, Edinburgh EH9 3BF, Scotland, UK
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Wilhelm Gruissem
2Institute of Molecular Plant Biology, Department of Biology, ETH Zurich, Universitaetstrasse 2, 8092 Zurich, Switzerland
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Abstract

Plants respond to seasonal cues, such as the photoperiod, to adapt to current conditions and to prepare for environmental changes in the season to come. To assess photoperiodic responses at the protein level, we quantified the proteome of the model plant Arabidopsis thaliana by mass spectrometry across four photoperiods. This revealed coordinated changes of abundance in proteins of photosynthesis, primary and secondary metabolism, including pigment biosynthesis, consistent with higher metabolic activity in long photoperiods. Higher translation rates in the daytime than the night likely contribute to these changes via rhythmic changes in RNA abundance. Photoperiodic control of protein levels might be greatest only if high translation rates coincide with high transcript levels in some photoperiods. We term this proposed mechanism ´translational coincidence´, mathematically model its components, and demonstrate its effect on the Arabidopsis proteome. Datasets from a green alga and a cyanobacterium suggest that translational coincidence contributes to seasonal control of the proteome in many phototrophic organisms. This may explain why many transcripts but not their cognate proteins exhibit diurnal rhythms.

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Posted August 29, 2017.
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Photoperiodic control of the Arabidopsis proteome reveals a translational coincidence mechanism
Daniel D Seaton, Alexander Graf, Katja Baerenfaller, Mark Stitt, Andrew J. Millar, Wilhelm Gruissem
bioRxiv 182071; doi: https://doi.org/10.1101/182071
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Photoperiodic control of the Arabidopsis proteome reveals a translational coincidence mechanism
Daniel D Seaton, Alexander Graf, Katja Baerenfaller, Mark Stitt, Andrew J. Millar, Wilhelm Gruissem
bioRxiv 182071; doi: https://doi.org/10.1101/182071

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