Cited by 48DNA Repair MechanismsEffects of Radiation ExposureDNA and Nucleic Acid Chemistry

Nucleotide excision repair-dependent DNA double-strand break formation and ATM signaling activation in mammalian quiescent cells

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Wakasugi, Mitsuo, Sasaki, Takuma, Matsumoto, Megumi, Nagaoka, Miyuki, Inoue, Keiko, Inobe, Manabu, Horibata, Katsuyoshi, Tanaka, Kiyoji +1 more·2014·Journal of Biological Chemistry

Abstract

Histone H2A variant H2AX is phosphorylated at Ser(139) in response to DNA double-strand break (DSB) and single-stranded DNA (ssDNA) formation. UV light dominantly induces pyrimidine photodimers, which are removed from the mammalian genome by nucleotide excision repair (NER). We previously reported that in quiescent G0 phase cells, UV induces ATR-mediated H2AX phosphorylation plausibly caused by persistent ssDNA gap intermediates during NER. In this study, we have found that DSB is also generated following UV irradiation in an NER-dependent manner and contributes to an earlier fraction of UV-induced H2AX phosphorylation. The NER-dependent DSB formation activates ATM kinase and triggers the accumulation of its downstream factors, MRE11, NBS1, and MDC1, at UV-damaged sites. Importantly, ATM-deficient cells exhibited enhanced UV sensitivity under quiescent conditions compared with asynchronously growing conditions. Finally, we show that the NER-dependent H2AX phosphorylation is also observed in murine peripheral T lymphocytes, typical nonproliferating quiescent cells in vivo. These results suggest that in vivo quiescent cells may suffer from NER-mediated secondary DNA damage including ssDNA and DSB.

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Crossref · 10.1074/jbc.m114.589747

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Authors
Wakasugi, M., Sasaki, T., Matsumoto, M., Nagaoka, M., Inoue, K., Inobe, M., Horibata, K., Tanaka, K., & Matsunaga, T.
Affiliations
  • Kanazawa University (JP)
  • The University of Osaka (JP)
Corresponding author
Matsunaga, Tsukasa
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2014-10
Volume
289
Issue
41
Pages
28730-28737
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2087293292
Cited by
48
References
40
Citations by year
2026: 2 · 2025: 1 · 2024: 5 · 2022: 5 · 2021: 3 · 2020: 8 · 2019: 3 · 2018: 8 · 2017: 4 · 2016: 7 · 2015: 2
FWCI
1.78
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (25640089, 22131009, 24510068, 26870867, 25281017)
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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
nucleotide excision repair, DNA double-strand break formation, ATM signaling, H2AX phosphorylation, UV-induced DNA damage, quiescent cells, G0 phase, ATR, MRE11, NBS1, MDC1, UV sensitivity, T cells, single-stranded DNA
MeSH terms
MRE11 Homologue Protein, Animals, Cell Line, Transformed, DNA Repair, DNA-Binding Proteins, DNA, Single-Stranded, Fibroblasts, Gene Expression Regulation, Histones, Humans, Nuclear Proteins, Phosphorylation, T-Lymphocytes, Ultraviolet Rays, Signal Transduction, Trans-Activators, Resting Phase, Cell Cycle, Cell Cycle Proteins, Adaptor Proteins, Signal Transducing, Mice, DNA Breaks, Double-Stranded, Primary Cell Culture, Ataxia Telangiectasia Mutated Proteins

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