Cited by 75Circadian rhythm and melatoninGenomics and Chromatin DynamicsChromatin Remodeling and Cancer

Coactivator-Dependent Oscillation of Chromatin Accessibility Dictates Circadian Gene Amplitude via REV-ERB Loading

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Zhu, Bokai, Gates, Leah A., Stashi, Erin, Dasgupta, Subhamoy, Gonzales, Naomi, Dean, Adam, Dacso, Clifford C., York, Brian +1 more·2015·Molecular Cell

Abstract

A central mechanism for controlling circadian gene amplitude remains elusive. We present evidence for a "facilitated repression (FR)" model that functions as an amplitude rheostat for circadian gene oscillation. We demonstrate that ROR and/or BMAL1 promote global chromatin decondensation during the activation phase of the circadian cycle to actively facilitate REV-ERB loading for repression of circadian gene expression. Mechanistically, we found that SRC-2 dictates global circadian chromatin remodeling through spatial and temporal recruitment of PBAF members of the SWI/SNF complex to facilitate loading of REV-ERB in the hepatic genome. Mathematical modeling highlights how the FR model sustains proper circadian rhythm despite fluctuations of REV-ERB levels. Our study not only reveals a mechanism for active communication between the positive and negative limbs of the circadian transcriptional loop but also establishes the concept that clock transcription factor binding dynamics is perhaps a central tenet for fine-tuning circadian rhythm.

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Authors
Zhu, B., Gates, L. A., Stashi, E., Dasgupta, S., Gonzales, N., Dean, A., Dacso, C. C., York, B., & O’Malley, B. W.
Affiliations
Baylor College of Medicine (US)
Corresponding author
O’Malley, Bert W.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2015-12
Volume
60
Issue
5
Pages
769-783
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2191489370
Cited by
75
References
37
Citations by year
2026: 5 · 2025: 4 · 2024: 6 · 2023: 4 · 2022: 11 · 2021: 3 · 2020: 7 · 2019: 8 · 2018: 6 · 2017: 15 · 2016: 6
FWCI
4.99
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • U.S. Public Health Service (NIDDK-P30 DK079638)
  • National Cancer Institute (F31CA171350)
  • National Institute of General Medical Sciences (GM-033976, R01GM033976)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01-DK59820, P01DK059820, P30DK079638, 3U19DK062434-10W1, U19DK062434)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD008188, R01HD007857)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
chromatin accessibility, ROR, Bmal1, SRC-2, PBAF, SWI/SNF chromatin remodeling, chromatin decondensation
MeSH terms
Animals, Chromatin, Circadian Rhythm, Gene Expression Regulation, Liver, Models, Biological, Mice, Nuclear Receptor Coactivator 2, ARNTL Transcription Factors, Nuclear Receptor Subfamily 1, Group D, Member 1, Nuclear Receptor Subfamily 1, Group F, Member 1

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