Cited by 69Circadian rhythm and melatoninAdvanced Proteomics Techniques and ApplicationsSleep and Wakefulness Research

The proteomic landscape of the suprachiasmatic nucleus clock reveals large-scale coordination of key biological processes

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Chiang, Cheng-Kang, Mehta, Neel, Patel, Abhilasha, Zhang, Peng, Ning, Zhibin, Mayne, Janice, Sun, Warren Y. L., Cheng, Hai-Ying M. +1 more·2014·PLoS Genetics

Abstract

The suprachiasmatic nucleus (SCN) acts as the central clock to coordinate circadian oscillations in mammalian behavior, physiology and gene expression. Despite our knowledge of the circadian transcriptome of the SCN, how it impacts genome-wide protein expression is not well understood. Here, we interrogated the murine SCN proteome across the circadian cycle using SILAC-based quantitative mass spectrometry. Of the 2112 proteins that were accurately quantified, 20% (421 proteins) displayed a time-of-day-dependent expression profile. Within this time-of-day proteome, 11% (48 proteins) were further defined as circadian based on a sinusoidal expression pattern with a ∼24 h period. Nine circadianly expressed proteins exhibited 24 h rhythms at the transcript level, with an average time lag that exceeded 8 h. A substantial proportion of the time-of-day proteome exhibited abrupt fluctuations at the anticipated light-to-dark and dark-to-light transitions, and was enriched for proteins involved in several key biological pathways, most notably, mitochondrial oxidative phosphorylation. Additionally, predicted targets of miR-133ab were enriched in specific hierarchical clusters and were inversely correlated with miR133ab expression in the SCN. These insights into the proteomic landscape of the SCN will facilitate a more integrative understanding of cellular control within the SCN clock.

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Crossref · 10.1371/journal.pgen.1004695

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  • It has been estimated that 6-20% of the murine proteome exhibits circadian rhythms in tissues such as the SCN and liver.

    “Similar to the reported proportion of rhythmic transcripts, it has been estimated that 6-20% of the murine proteome exhibits circadian rhythms in tissues such as the SCN (33,34) and liver (35)(36)(37).”

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Authors
Chiang, C.-K., Mehta, N., Patel, A., Zhang, P., Ning, Z., Mayne, J., Sun, W. Y. L., Cheng, H.-Y. M., & Figeys, D.
Affiliations
  • University of Ottawa (CA)
  • University of Toronto (CA)
Corresponding author
  • Cheng, Hai-Ying M.
  • Figeys, Daniel
Venue
PLoS Genetics
Published
2014-10-16
Volume
10
Issue
10
Pages
e1004695
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2088651867
Cited by
69
References
33
Citations by year
2026: 3 · 2025: 7 · 2024: 3 · 2023: 7 · 2022: 5 · 2021: 8 · 2020: 2 · 2019: 8 · 2018: 7 · 2017: 8 · 2016: 8 · 2015: 3
FWCI
3.09
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Canadian Institutes of Health Research (MOP86549, MOP#126090)
  • Natural Sciences and Engineering Research Council of Canada
  • Ontario Ministry of Research and Innovation
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Physical Sciences › Chemistry › Spectroscopy › Advanced Proteomics Techniques and Applications
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
suprachiasmatic nucleus, circadian clock, circadian rhythm, mitochondrial oxidative phosphorylation, circadian transcriptome, light-dark transition
MeSH terms
Animals, Circadian Rhythm, Gene Expression Regulation, Light, Male, Mice, Inbred C57BL, Oxidative Phosphorylation, Suprachiasmatic Nucleus, Proteome, Mitochondrial Proteins, MicroRNAs, Proteomics, Transcriptome, Protein Interaction Maps

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