Cited by 122DNA Repair MechanismsDNA and Nucleic Acid ChemistryPARP inhibition in cancer therapy

The human Rad9/Rad1/Hus1 damage sensor clamp interacts with DNA polymerase and increases its DNA substrate utilisation efficiency: implications for DNA repair

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Toueille, M.·2004·Nucleic Acids Research

Abstract

In eukaryotic cells, checkpoints are activated in response to DNA damage. This requires the action of DNA damage sensors such as the Rad family proteins. The three human proteins Rad9, Rad1 and Hus1 form a heterotrimeric complex (called the 9-1-1 complex) that is recruited onto DNA upon damage. DNA damage also triggers the recruitment of DNA repair proteins at the lesion, including specialized DNA polymerases. In this work, we showed that the 9-1-1 complex can physically interact with DNA polymerase beta in vitro. Functional analysis revealed that the 9-1-1 complex had a stimulatory effect on DNA polymerase beta activity. However, the presence of 9-1-1 complex neither affected DNA polymerase lambda, another X family DNA polymerase, nor the two replicative DNA polymerases alpha and delta. DNA polymerase beta stimulation resulted from an increase in its affinity for the primer-template and the interaction with the 9-1-1 complex stimulated deoxyribonucleotides misincorporation by DNA polymerase beta. In addition, the 9-1-1 complex enhanced DNA strand displacement synthesis by DNA polymerase beta on a 1 nt gap DNA substrate. Our data raise the possibility that the 9-1-1 complex might attract DNA polymerase beta to DNA damage sites, thus connecting directly checkpoints and DNA repair.

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  • The 9-1-1 complex interacts with BER proteins APE1, Pol β, FEN1, DNA ligase I, and DNA glycosylases MutY, NEIL1, and TDG, stimulating their DNA repair activities.

    “As a critical component of ATR-Chk1 checkpoint pathway, the 9-1-1 complex interacts with several BER proteins: APE1, Polymerase β (Pol β), FEN1, DNA ligase I, as well as DNA glycosylases MutY, NEIL1, and TDG, thereby stimulating their DNA repair activities [177–185] (Fig. 3).”

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Authors
Toueille, M.
Affiliations
University of Zurich (CH)
Corresponding author
Toueille, M.
Venue
Nucleic Acids Research
Published
2004-06-21
Volume
32
Issue
11
Pages
3316-3324
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W1981313684
Cited by
122
References
57
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 2 · 2022: 4 · 2020: 1 · 2016: 3 · 2015: 4 · 2014: 4 · 2013: 14 · 2012: 6
FWCI
4.74
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Zurich Open Repository and Archive (University of Zurich) (acceptedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich) (submittedVersion, other-oa)
  • Zurich Open Repository and Archive (University of Zurich)
Funders
  • National Science Foundation
  • Association pour la Recherche sur le Cancer
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (31.61361.00, 61361)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
  • Health Sciences › Medicine › Oncology › PARP inhibition in cancer therapy
Keywords
9-1-1 complex, Rad9, RAD1, Hus1, DNA damage checkpoint, DNA polymerase beta, DNA polymerase lambda, DNA repair, misincorporation, strand displacement synthesis, DNA damage sensor
MeSH terms
Base Sequence, Deoxyribonucleotides, DNA, DNA Damage, DNA Repair, Exonucleases, Humans, Templates, Genetic, Cell Cycle Proteins, DNA Polymerase beta, Schizosaccharomyces pombe Proteins, Macromolecular Substances

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