Cited by 34DNA Repair MechanismsDNA and Nucleic Acid ChemistryCarcinogens and Genotoxicity Assessment

The fidelity of the human leading and lagging strand DNA replication apparatus with 8-oxodeoxyguanosine triphosphate

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Minnick, Dana T., Pavlov, Youri I., Kunkel, Thomas A.·1994·Nucleic Acids Research

Abstract

A product of oxidative metabolism, 8-oxodeoxyguanosine triphosphate (8-O-dGTP), readily pairs with adenine during DNA replication, ultimately causing A.T-->C.G transversions. This study utilized 8-O-dGTP as a probe to examine the fidelity of the leading and lagging strand replication apparatus in extracts of HeLa cells. Simian virus (SV) 40 T antigen-dependent DNA replication reactions were performed with two M13mp2 vectors with the SV40 origin located on opposite sides of the lacZ alpha sequence used to score replication errors. The presence of 8-O-dGTP at equimolar concentration with each of the 4 normal dNTPs resulted in a > 46-fold increase in error rate for A.T-->C.G transversion over that observed in the absence of 8-O-dGTP. A similar average error rate was observed on the (+) and (-) strands in both vectors, suggesting that the fidelity of replication by leading and lagging strand replication proteins is similar for the dA.8-O-dGMP mispair. Replication fidelity in the presence of 8-O-dGTP was reduced on both strands when an inhibitor of exonucleolytic proofreading (dGMP) was added to the reaction. These data suggest that the majority of dA.8-O-dGMP mispairs are proofread by both leading and lagging strand replication proteins.

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Crossref · 10.1093/nar/22.25.5658

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  • MtDNA oxidation renders mtDNA more susceptible to mutation because oxidized bases are misread during replication and lead to nucleotide substitutions.

    “MtDNA oxidation, in turn, renders mtDNA more susceptible to mutation because oxidized bases are misread during replication and this leads to nucleotide substitutions [118–120].”

    From Brain aging, Alzheimer's disease, and mitochondria (2011) · cites this paper as [118]

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Authors
Minnick, D. T., Pavlov, Y. I., & Kunkel, T. A.
Affiliations
  • National Institutes of Health (US)
  • St Petersburg University (RU)
Corresponding author
Kunkel, Thomas A.
Venue
Nucleic Acids Research
Published
1994
Volume
22
Issue
25
Pages
5658-5664
ISSN
  • 0305-1048 (ISSN-L)
  • 1362-4962
OpenAlex
W2085060564
Cited by
34
References
28
Citations by year
2025: 1 · 2020: 1 · 2019: 2 · 2016: 1 · 2015: 2 · 2012: 1
FWCI
0.76
Type
journal article
Language
en
Open access
Locations
  • Nucleic Acids Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Carcinogens and Genotoxicity Assessment
Keywords
DNA replication fidelity, leading strand, lagging strand, oxidative DNA damage, exonuclease proofreading, SV40 T antigen, HeLa cells, dGMP
MeSH terms
Base Sequence, Deoxyguanine Nucleotides, DNA Repair, DNA Replication, Exonucleases, HeLa Cells, Humans, Molecular Sequence Data, Oxidation-Reduction, Mutagenesis

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