Cited by 299DNA Repair MechanismsGenomics and Chromatin DynamicsEffects of Radiation Exposure

Activation of the Cellular DNA Damage Response in the Absence of DNA Lesions

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Soutoglou, Evi, Misteli, Tom·2008·Science

Abstract

The cellular DNA damage response (DDR) is initiated by the rapid recruitment of repair factors to the site of DNA damage to form a multiprotein repair complex. How the repair complex senses damaged DNA and then activates the DDR is not well understood. We show that prolonged binding of DNA repair factors to chromatin can elicit the DDR in an ATM (ataxia telangiectasia mutated)– and DNAPK (DNA-dependent protein kinase)–dependent manner in the absence of DNA damage. Targeting of single repair factors to chromatin revealed a hierarchy of protein interactions within the repair complex and suggests amplification of the damage signal. We conclude that activation of the DDR does not require DNA damage and stable association of repair factors with chromatin is likely a critical step in triggering, amplifying, and maintaining the DDR signal.

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Crossref · 10.1126/science.1159051

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  • DNA damage response signaling can happen without a DNA lesion.

    “This conclusion is in line with earlier tethering experiments demonstrating that a DNA lesion is not an obligatory part of the DDR machinery and DDR signaling can occur in its absence, allowing for the possibility of DDR initiation by stimuli other than DNA damage, such as chromatin structure (Bonilla et al., 2008; Soutoglou and Misteli, 2008).”

    From Activation of DNA Damage Response Signaling by Condensed Chromatin (2014) · cites this paper as Soutoglou and Misteli, 2008

  • A DNA lesion is not required for the DNA damage response machinery.

    “This conclusion is in line with earlier tethering experiments demonstrating that a DNA lesion is not an obligatory part of the DDR machinery and DDR signaling can occur in its absence, allowing for the possibility of DDR initiation by stimuli other than DNA damage, such as chromatin structure (Bonilla et al., 2008; Soutoglou and Misteli, 2008).”

    From Activation of DNA Damage Response Signaling by Condensed Chromatin (2014) · cites this paper as Soutoglou and Misteli, 2008

  • The DDR activation by condensed chromatin is not due to DNA breaks induced by tethering, as no breaks were detected by TUNEL, Southern blot, or LM-PCR.

    “No labeling by terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) was detected”

    From Activation of DNA Damage Response Signaling by Condensed Chromatin (2014) · cites this paper as Soutoglou and Misteli, 2008

  • The MRN complex, MDC1, and H2AX are required for ATM recruitment to double-strand break sites for efficient ATM-mediated DDR activation.

    “The MRN complex, MDC1, and H2AX are essential for the recruitment of ATM to the site of DSBs for efficient ATM-mediated DDR activation.”
  • DDR activation requires stable association of DNA repair proteins in homologous recombination, not DNA damage itself.

    “suggesting that DDR activation requires the stable association of DNA repair proteins in HR, but not DNA damage per se [219]”

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Authors
Soutoglou, E., & Misteli, T.
Affiliations
National Institutes of Health (US)
Venue
Science
Published
2008-06-13
Volume
320
Issue
5882
Pages
1507-1510
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W2067328670
Cited by
299
References
21
Citations by year
2026: 2 · 2025: 3 · 2024: 9 · 2023: 9 · 2022: 9 · 2021: 7 · 2020: 10 · 2019: 11 · 2018: 14 · 2017: 15 · 2016: 13 · 2015: 15 · 2014: 26 · 2013: 21 · 2012: 19
FWCI
15.89
Type
journal article
Language
en
Open access
Locations
  • Science (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health
  • National Cancer Institute (Z01BC010309)
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
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
Keywords
DNA damage response, ATM, DNA repair proteins, chromatin binding, signal amplification, protein-protein interaction
MeSH terms
Tumor Suppressor p53-Binding Protein 1, Checkpoint Kinase 1, MRE11 Homologue Protein, Animals, Cell Cycle, Cells, Cultured, Chromatin, Chromosomal Proteins, Non-Histone, DNA Damage, DNA Repair, DNA-Binding Proteins, Histones, Nuclear Proteins, Phosphorylation, Protein Kinases, Recombinant Fusion Proteins, Signal Transduction, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Tumor Suppressor Proteins, NIH 3T3 Cells, DNA Repair Enzymes, Intracellular Signaling Peptides and Proteins, Adaptor Proteins, Signal Transducing, Mice, Ataxia Telangiectasia Mutated Proteins, Checkpoint Kinase 2

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