Cited by 7DNA Repair MechanismsCancer-related Molecular PathwaysUbiquitin and proteasome pathways

Mitotic UV Irradiation Induces a DNA Replication-Licensing Defect that Potentiates G1 Arrest Response

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Morino, Masayuki, Nukina, Kohei, Sakaguchi, Hiroki, Maeda, Takeshi, Takahara, Michiyo, Shiomi, Yasushi, Nishitani, Hideo·2015·PLOS ONE

Abstract

Cdt1 begins to accumulate in M phase and has a key role in establishing replication licensing at the end of mitosis or in early G1 phase. Treatments that damage the DNA of cells, such as UV irradiation, induce Cdt1 degradation through PCNA-dependent CRL4-Cdt2 ubiquitin ligase. How Cdt1 degradation is linked to cell cycle progression, however, remains unclear. In G1 phase, when licensing is established, UV irradiation leads to Cdt1 degradation, but has little effect on the licensing state. In M phase, however, UV irradiation does not induce Cdt1 degradation. When mitotic UV-irradiated cells were released into G1 phase, Cdt1 was degraded before licensing was established. Thus, these cells exhibited both defective licensing and G1 cell cycle arrest. The frequency of G1 arrest increased in cells expressing extra copies of Cdt2, and thus in cells in which Cdt1 degradation was enhanced, whereas the frequency of G1 arrest was reduced in cell expressing an extra copy of Cdt1. The G1 arrest response of cells irradiated in mitosis was important for cell survival by preventing the induction of apoptosis. Based on these observations, we propose that mammalian cells have a DNA replication-licensing checkpoint response to DNA damage induced during mitosis.

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  1. [10]Abbas T, Dutta A (2011) CRL4Cdt2: master coordinator of cell cycle progression and genome stability. Cell Cycle 10: 241– 249. 21212733 PMC3025761

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Authors
Morino, M., Nukina, K., Sakaguchi, H., Maeda, T., Takahara, M., Shiomi, Y., & Nishitani, H.
Affiliations
University of Hyogo (JP)
Corresponding author
Nishitani, Hideo
Venue
PLOS ONE
Published
2015-03-23
Volume
10
Issue
3
Pages
e0120553
ISSN
1932-6203 (ISSN-L)
OpenAlex
W1965221920
Cited by
7
References
50
Citations by year
2025: 1 · 2022: 2 · 2020: 1 · 2018: 1 · 2017: 1 · 2016: 1
FWCI
0.43
Type
journal article
Language
en
Open access
Locations
  • PLoS ONE (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Japan Society for the Promotion of Science (25430171, 26291025)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Ubiquitin and proteasome pathways
Keywords
Cdt1, Cdt2, DNA replication licensing, G1 cell cycle arrest, PCNA, DNA damage checkpoint, apoptosis inhibition, cell cycle progression
MeSH terms
Chromatin, DNA Damage, DNA Replication, Gene Expression Regulation, Humans, Mitosis, Nuclear Proteins, Ultraviolet Rays, Cell Cycle Proteins, Ubiquitin-Protein Ligases, Cell Line, Tumor, Protein Stability, G1 Phase Cell Cycle Checkpoints, Proteolysis, Minichromosome Maintenance Proteins

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