Cited by 326Genomics and Chromatin DynamicsEpigenetics and DNA MethylationChromatin Remodeling and Cancer

H3K27me3-rich genomic regions can function as silencers to repress gene expression via chromatin interactions

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Cai, Yichao, Zhang, Ying, Loh, Yan Ping, Tng, Jia Qi, Lim, Mei Chee, Cao, Zhendong, Raju, Anandhkumar, Lieberman Aiden, Erez +5 more·2021·Nature Communications

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Abstract

The mechanisms underlying gene repression and silencers are poorly understood. Here we investigate the hypothesis that H3K27me3-rich regions of the genome, defined from clusters of H3K27me3 peaks, may be used to identify silencers that can regulate gene expression via proximity or looping. We find that H3K27me3-rich regions are associated with chromatin interactions and interact preferentially with each other. H3K27me3-rich regions component removal at interaction anchors by CRISPR leads to upregulation of interacting target genes, altered H3K27me3 and H3K27ac levels at interacting regions, and altered chromatin interactions. Chromatin interactions did not change at regions with high H3K27me3, but regions with low H3K27me3 and high H3K27ac levels showed changes in chromatin interactions. Cells with H3K27me3-rich regions knockout also show changes in phenotype associated with cell identity, and altered xenograft tumor growth. Finally, we observe that H3K27me3-rich regions-associated genes and long-range chromatin interactions are susceptible to H3K27me3 depletion. Our results characterize H3K27me3-rich regions and their mechanisms of functioning via looping.

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  • EZH2 binding sites mostly overlapped with H3K27me3 peaks in P-S loop anchors.

    “Next, we performed CUT&Tag for EZH2, a subunit of Polycomb repressive complex II, in THP-1 cells and observed that EZH2 binding sites mostly overlapped with H3K27me3 peaks in the P-S loop anchors (Extended Data Fig. 6d), consistent with the previously reported promoter-silencer loops30,31.”

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Authors
Cai, Y., Zhang, Y., Loh, Y. P., Tng, J. Q., Lim, M. C., Cao, Z., Raju, A., Lieberman Aiden, E., Li, S., Manikandan, L., Tergaonkar, V., Tucker-Kellogg, G., & Fullwood, M. J.
Affiliations
  • National University of Singapore (SG)
  • Agency for Science, Technology and Research (SG)
Corresponding author
Fullwood, Melissa Jane
Venue
Nature Communications
Published
2021-01-29
Volume
12
Issue
1
Pages
719-719
ISSN
2041-1723 (ISSN-L)
OpenAlex
W3124680305
Cited by
321
References
90
Citations by year
2026: 49 · 2025: 65 · 2024: 79 · 2023: 58 · 2022: 52 · 2021: 17
FWCI
16.56
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • National University of Singapore (submittedVersion, cc-by)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
National Research Foundation Singapore (NRF-CRP17-2017-02)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chromatin Remodeling and Cancer
Keywords
H3K27me3, gene silencing, chromatin interactions, gene expression inhibition, H3K27ac, cell identity, xenograft tumor growth, polycomb repressive complex 2
MeSH terms
Chromatin Immunoprecipitation Sequencing, RNA-Seq, Animals, Chromatin, Female, Fibroblast Growth Factors, Histones, Humans, Insulin-Like Growth Factor II, Neoplasms, Gene Expression Regulation, Neoplastic, Xenograft Model Antitumor Assays, Silencer Elements, Transcriptional, Cell Line, Tumor, Mice, Gene Knockdown Techniques, Gene Knockout Techniques, Epigenetic Repression

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