Error prone translesion synthesis past γ-hydroxypropano deoxyguanosine the primary acrolein-derived adduct in mammalian cells

Manorama Kanuri, Irina Minko, Lubomir V. Nechev, Thomas M. Harris, Constance M. Harris, Robert (Stephen) Lloyd

Research output: Contribution to journalArticle

69 Citations (Scopus)

Abstract

8-Hydroxy-5,6,7,8.tetrahydropyrimido[1,2-a]purin-10(3H)-one,3-(2′ -deoxyriboside) (1,N2-γ-hydroxyprano deoxyguanosine, γ-HOPdG) is a major DNA adduct that forms as a result of exposure to acrolein, an environmental pollutant and a product of endogenous lipid peroxidation. γ-HOPdG has been shown previously not to be a miscoding lesion when replicated in Escherichia coli. In contrast to those prokaryotic studies, in vivo replication and mutagenesis assays in COS-7 cells using single stranded DNA containing a specific γ-HOPdG adduct, revealed that the y-HOPdG adduct was significantly mutagenic. Analyses revealed both transversion and transition types of mutations at an overall mutagenic frequency of 7.4 × 10-2/translesion synthesis. In vitro γ-HOPdG strongly blocks DNA synthesis by two major polymerases, pol δ and pol ε. Replicative blockage ofpol δ by γ-HOPdG could be diminished by the addition of proliferating cell nuclear antigen, leading to highly mutagenic translesion bypass across this adduct. The differential functioning and processing capacities of the mammalian polymerases may be responsible for the higher mutation frequencies observed in this study when compared with the accurate and efficient nonmutagenic bypass observed in the bacterial system.

Original languageEnglish (US)
Pages (from-to)18257-18265
Number of pages9
JournalJournal of Biological Chemistry
Volume277
Issue number21
DOIs
StatePublished - May 24 2002
Externally publishedYes

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Acrolein
Environmental Pollutants
Deoxyguanosine
DNA Adducts
Single-Stranded DNA
COS Cells
Proliferating Cell Nuclear Antigen
Mutation Rate
Mutagenesis
Lipid Peroxidation
Cells
Escherichia coli
Mutation
DNA
Assays
Lipids
Processing
In Vitro Techniques

ASJC Scopus subject areas

  • Biochemistry

Cite this

Error prone translesion synthesis past γ-hydroxypropano deoxyguanosine the primary acrolein-derived adduct in mammalian cells. / Kanuri, Manorama; Minko, Irina; Nechev, Lubomir V.; Harris, Thomas M.; Harris, Constance M.; Lloyd, Robert (Stephen).

In: Journal of Biological Chemistry, Vol. 277, No. 21, 24.05.2002, p. 18257-18265.

Research output: Contribution to journalArticle

Kanuri, Manorama ; Minko, Irina ; Nechev, Lubomir V. ; Harris, Thomas M. ; Harris, Constance M. ; Lloyd, Robert (Stephen). / Error prone translesion synthesis past γ-hydroxypropano deoxyguanosine the primary acrolein-derived adduct in mammalian cells. In: Journal of Biological Chemistry. 2002 ; Vol. 277, No. 21. pp. 18257-18265.
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