Cited by 88DNA Repair MechanismsBacterial Genetics and BiotechnologyGenomics and Chromatin Dynamics

Signaling from Mus81-Eme2-Dependent DNA Damage Elicited by Chk1 Deficiency Modulates Replication Fork Speed and Origin Usage

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Técher, Hervé, Koundrioukoff, Stéphane, Carignon, Sandra, Wilhelm, Therese, Millot, Gaël A., Lopez, Bernard S., Brison, Olivier, Debatisse, Michelle·2016·Cell Reports

Abstract

Mammalian cells deficient in ATR or Chk1 display moderate replication fork slowing and increased initiation density, but the underlying mechanisms have remained unclear. We show that exogenous deoxyribonucleosides suppress both replication phenotypes in Chk1-deficient, but not ATR-deficient, cells. Thus, in the absence of exogenous stress, depletion of either protein impacts the replication dynamics through different mechanisms. In addition, Chk1 deficiency, but not ATR deficiency, triggers nuclease-dependent DNA damage. Avoiding damage formation through invalidation of Mus81-Eme2 and Mre11, or preventing damage signaling by turning off the ATM pathway, suppresses the replication phenotypes of Chk1-deficient cells. Damage and resulting DDR activation are therefore the cause, not the consequence, of replication dynamics modulation in these cells. Together, we identify moderate reduction of precursors available for replication as an additional outcome of DDR activation. We propose that resulting fork slowing, and subsequent firing of backup origins, helps replication to proceed along damaged templates.

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  1. Alabert, C., Bukowski-Wills, J.C., Lee, S.B., Kustatscher, G., Nakamura, K., de Lima Alves, F., Menard, P., Mejlvang, J., Rappsilber, J., and Groth, A. (2014). Nascent chromatin capture proteomics determines chromatin dynamics during DNA replication and identifies unknown fork components. Nat. Cell Biol. 16 , 281-293. http://refhub.elsevier.com/S2211-1247(1501549-1/sref2)
  2. Zhao,H.,Watkins,J.L.,andPiwnica-Worms,H.(2002).Disruption ofthecheckpoint kinase 1/cell division cycle 25A pathway abrogates ionizing radiationinduced S and G2 checkpoints. Proc. Natl. Acad. Sci. USA 99 , 14795-14800. http://refhub.elsevier.com/S2211-1247(1501549-1/sref64)

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Authors
Técher, H., Koundrioukoff, S., Carignon, S., Wilhelm, T., Millot, G. A., Lopez, B. S., Brison, O., & Debatisse, M.
Affiliations
Centre National de la Recherche Scientifique (FR)
Corresponding author
Debatisse, Michelle
Venue
Cell Reports
Publisher
Elsevier BV
Published
2016-02
Volume
14
Issue
5
Pages
1114-1127
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2255888132
Cited by
88
References
65
Citations by year
2026: 5 · 2025: 1 · 2024: 3 · 2023: 9 · 2022: 8 · 2021: 11 · 2020: 8 · 2019: 10 · 2018: 11 · 2017: 16 · 2016: 6
FWCI
7.45
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • HAL (submittedVersion, cc-by-nc-nd)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Association pour la Recherche sur le Cancer
  • Agence Nationale de la Recherche (ANR-13-BSV6-0008)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
DNA damage response, MRE11, replication fork speed, origin firing, deoxyribonucleosides, ATM pathway, DNA replication initiation, replication stress
MeSH terms
Checkpoint Kinase 1, MRE11 Homologue Protein, Animals, Deoxyribonucleosides, DNA Damage, DNA Repair, DNA Replication, DNA-Binding Proteins, Endodeoxyribonucleases, Endonucleases, Humans, Protein Kinases, Signal Transduction, Replication Origin, Cell Line, Tumor, Cell Proliferation, Ataxia Telangiectasia Mutated Proteins

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