Cited by 502DNA Repair MechanismsEffects of Radiation ExposureCancer-related Molecular Pathways

The Mre11 complex is required for ATM activation and the G2/M checkpoint

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Carson, Christian T., Schwartz, Rachel A., Stracker, Travis H., Lilley, Caroline E., Lee, Darwin V., Weitzman, Matthew D.·2003·The EMBO Journal

Abstract

The maintenance of genome integrity requires a rapid and specific response to many types of DNA damage. The conserved and related PI3-like protein kinases, ataxia-telangiectasia mutated (ATM) and ATM-Rad3-related (ATR), orchestrate signal transduction pathways in response to genomic insults, such as DNA double-strand breaks (DSBs). It is unclear which proteins recognize DSBs and activate these pathways, but the Mre11/Rad50/NBS1 complex has been suggested to act as a damage sensor. Here we show that infection with an adenovirus lacking the E4 region also induces a cellular DNA damage response, with activation of ATM and ATR. Wild-type virus blocks this signaling through degradation of the Mre11 complex by the viral E1b55K/E4orf6 proteins. Using these viral proteins, we show that the Mre11 complex is required for both ATM activation and the ATM-dependent G(2)/M checkpoint in response to DSBs. These results demonstrate that the Mre11 complex can function as a damage sensor upstream of ATM/ATR signaling in mammalian cells.

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  1. Nghiem,P., Park,P.K., Kim,Y., Vaziri,C. and Schreiber,S.L. (2001) ATR inhibition selectively sensitizes G1 checkpoint-de®cient cells to lethal premature chromatin condensation. Proc. Natl Acad. Sci. USA, 98, 9092±9097.

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Authors
Carson, C. T., Schwartz, R. A., Stracker, T. H., Lilley, C. E., Lee, D. V., & Weitzman, M. D.
Affiliations
Salk Institute for Biological Studies (US)
Corresponding author
Weitzman, Matthew D.
Venue
The EMBO Journal
Published
2003-12-15
Volume
22
Issue
24
Pages
6610-6620
ISSN
  • 0261-4189 (ISSN-L)
  • 1460-2075
OpenAlex
W2031414445
Cited by
502
References
47
Citations by year
2026: 2 · 2025: 5 · 2024: 5 · 2023: 11 · 2022: 5 · 2021: 9 · 2020: 11 · 2019: 18 · 2018: 13 · 2017: 14 · 2016: 12 · 2015: 16 · 2014: 16 · 2013: 22 · 2012: 21
FWCI
17.12
Type
journal article
Language
en
Open access
Locations
  • The EMBO Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Joe W. and Dorothy Dorsett Brown Foundation
  • Wellcome Trust
  • National Institutes of Health (5r01ai043341-04, 5r01ca097093-13)
  • University of California, San Diego
  • National Cancer Institute (CA97093, R01-CA097093)
  • National Institute of Allergy and Infectious Diseases (AI43341)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Effects of Radiation Exposure
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
Mre11 complex, ATM activation, ATR, G2/M checkpoint, DNA double-strand breaks, DNA damage response, E4orf6, genome stability
MeSH terms
MRE11 Homologue Protein, Adenoviruses, Human, Ataxia Telangiectasia, Cell Cycle, Cell Line, Defective Viruses, DNA Damage, DNA-Binding Proteins, HeLa Cells, Humans, Mitosis, Recombinant Proteins, Virus Replication, Signal Transduction, Polymerase Chain Reaction, G2 Phase, Mutagenesis, Site-Directed, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Tumor Suppressor Proteins, Ataxia Telangiectasia Mutated Proteins

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