Cited by 741DNA Repair MechanismsGenomics and Chromatin DynamicsChromatin Remodeling and Cancer

ATM-Dependent Chromatin Changes Silence Transcription In cis to DNA Double-Strand Breaks

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Shanbhag, Niraj M., Rafalska-Metcalf, Ilona U., Balane-Bolivar, Carlo, Janicki, Susan M., Greenberg, Roger A.·2010·Cell

Abstract

DNA double-strand breaks (DSBs) initiate extensive local and global alterations in chromatin structure, many of which depend on the ATM kinase. Histone H2A ubiquitylation (uH2A) on chromatin surrounding DSBs is one example, thought to be important for recruitment of repair proteins. uH2A is also implicated in transcriptional repression; an intriguing yet untested hypothesis is that this function is conserved in the context of DSBs. Using a novel reporter that allows for visualization of repair protein recruitment and local transcription in single cells, we describe an ATM-dependent transcriptional silencing program in cis to DSBs. ATM prevents RNA polymerase II elongation-dependent chromatin decondensation at regions distal to DSBs. Silencing is partially dependent on E3 ubiquitin ligases RNF8 and RNF168, whereas reversal of silencing relies on the uH2A deubiquitylating enzyme USP16. These findings give insight into the role of posttranslational modifications in mediating crosstalk between diverse processes occurring on chromatin.

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Crossref · 10.1016/j.cell.2010.04.038

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  • Prior work has shown that DSBs can disrupt expression of genes near breaks in cultured tumor cells.

    “DSBs were previously shown to interfere with the expression of break-proximal genes in tumor cell lines (11–13,42).”
  • Recent findings demonstrate transcriptional repression in cis to DSBs that depends on DNA damage signaling and ceases after DSB repair is complete.

    “Consistent with this, recent findings demonstrate transcriptional repression in cis to DSBs, which depends on DNA damage signaling and ceases after DSB repair is complete (10–13).”
  • This prior work on transcriptional repression in cis to DSBs is limited to highly proliferative tumor cell lines, and its implications for animal tissues remain unclear.

    “This work is, however, limited to highly proliferative tumor cell lines, and its implications for animal tissues, which often exhibit little or no proliferation, remain unclear.”
  • DSBs are known to trigger dynamic reorganization of chromatin near breaks, which can affect expression of both nearby and apparently undamaged genes.

    “DSBs are known to promote a dynamic reorganization of break-proximal chromatin, with the potential to affect the expression of both break-proximal and ostensibly undamaged genes (10,13,19,45,48–50).”
  • The findings suggest that most tissues can restore DSB-induced gene deregulation, though repair and silencing kinetics may vary with cell type and cell cycle state.

    “our findings, thus, suggest that most tissues have the potential to restore DSB-induced gene deregulation, although the kinetics of DSB repair and DNA damage-associated gene silencing may differ depending on cell type and/or cell cycle state.”

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Authors
Shanbhag, N. M., Rafalska-Metcalf, I. U., Balane-Bolivar, C., Janicki, S. M., & Greenberg, R. A.
Affiliations
  • Abramson Cancer Center (US)
  • The Wistar Institute (US)
Corresponding author
Greenberg, Roger A.
Venue
Cell
Publisher
Elsevier BV
Published
2010-06
Volume
141
Issue
6
Pages
970-981
ISSN
0092-8674 (ISSN-L)
OpenAlex
W2135144687
Cited by
737
References
53
Citations by year
2026: 30 · 2025: 28 · 2024: 45 · 2023: 45 · 2022: 49 · 2021: 71 · 2020: 51 · 2019: 45 · 2018: 38 · 2017: 49 · 2016: 45 · 2015: 44 · 2014: 46 · 2013: 54 · 2012: 42
FWCI
19.66
Type
journal article
Language
en
Open access
Locations
  • Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Genentech
  • National Cancer Institute (K08CA106597, T32CA115299, R01CA138835, 1-T32-CA-115299-01A2)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • 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
ATM kinase, DNA double-strand breaks, transcriptional silencing, chromatin decondensation, RNA polymerase II elongation, RNF8, RNF168, USP16, E3 ubiquitin ligase, post-translational modification
MeSH terms
Chromatin, DNA Damage, DNA-Binding Proteins, Histones, Humans, Transcription, Genetic, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Gene Silencing, Tumor Suppressor Proteins, Ubiquitin Thiolesterase, Cell Line, Tumor, DNA Breaks, Double-Stranded, Ubiquitination, Ataxia Telangiectasia Mutated Proteins

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