Cited by 40DNA Repair MechanismsCarcinogens and Genotoxicity AssessmentDNA and Nucleic Acid Chemistry

Roles of specialized DNA polymerases in mutagenesis by 8-hydroxyguanine in human cells

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Kamiya, Hiroyuki, Yamaguchi, Ayaka, Suzuki, Tetsuya, Harashima, Hideyoshi·2010·Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis

Abstract

The formation of 8-hydroxyguanine (8-OH-Gua, 7,8-dihydro-8-oxoguanine) in DNA and in the nucleotide pool results in G:C-->T:A and A:T-->C:G substitution mutations, respectively, due to the ability of 8-OH-Gua to pair with both C and A. In this study, shuttle plasmid DNAs containing 8-OH-Gua paired with C and A in the supF gene were transfected into human 293T cells, in which specialized DNA polymerases were knocked-down. The DNAs replicated in the cells were recovered and then introduced into an indicator strain of Escherichia coli. Mutation analysis indicated that the knock-downs of DNA polymerases eta and zeta by siRNAs enhanced the G:C-->T:A mutations caused by 8-OH-Gua:C. The 8-OH-Gua:C-induced mutation frequency was not further increased by double knock-downs of DNA polymerases eta and zeta, suggesting that the two DNA polymerases work in the same pathway. In addition, the reduction of DNA polymerase eta slightly decreased the A:T-->C:G substitutions caused by 8-OH-Gua:A. These results suggest that DNA polymerases eta and zeta are involved in the bypass of 8-OH-Gua in human cells.

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Crossref · 10.1016/j.mrfmmm.2010.02.001

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  • Pol eta can insert A or C opposite a site with 8-oxoG, which may result in a G to T transversion.

    “Pol eta can insert A or C opposite a site with 8-oxoG, which may result in a G to T transversion.”
  • Pol eta can perform bypass, with moderate efficiency, of 8-oxoG, which has a potentially important role in the suppression of mutations due to this oxidatively generated DNA lesion in human cells.

    “It can also perform the bypass, with moderate efficiency, of 8-oxoG, which has a potentially important role in the suppression of mutations due to this oxidatively generated DNA lesion in human cells [109,271].”

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Authors
Kamiya, H., Yamaguchi, A., Suzuki, T., & Harashima, H.
Affiliations
Hokkaido University (JP)
Corresponding author
Kamiya, Hiroyuki
Venue
Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis
Publisher
Elsevier BV
Published
2010-04
Volume
686
Issue
1-2
Pages
90-95
ISSN
  • 0027-5107 (ISSN-L)
  • 1386-1964
OpenAlex
W2048816529
Cited by
40
References
54
Citations by year
2025: 2 · 2024: 3 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 2 · 2019: 3 · 2018: 4 · 2017: 1 · 2016: 4 · 2015: 3 · 2014: 2 · 2013: 4 · 2012: 2
FWCI
1.30
Type
journal article
Language
en
Open access
Locations
  • Mutation research. Fundamental and molecular mechanisms of mutagenesis (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (submittedVersion)
  • Hokkaido University Collection of Scholarly and Academic Papers (Hokkaido University) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA and Nucleic Acid Chemistry
Keywords
8-oxoguanine, DNA polymerase eta, DNA polymerase zeta, mutagenesis, nucleotide pools, DNA replication, transfection, siRNA knockdown, HEK293T cells, mutational pathways
MeSH terms
Y-Family DNA Polymerases, DNA-Directed DNA Polymerase, Guanine, Humans, Plasmids, Mutagenesis

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