Related Experiment Video

Updated: Sep 28, 2026

Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter
12:15

Quantification of three DNA Lesions by Mass Spectrometry and Assessment of Their Levels in Tissues of Mice Exposed to Ambient Fine Particulate Matter

Published on: May 29, 2019

How DNA lesions are turned into mutations within cells?

Vincent Pagès1, Robert P P Fuchs

  • 1UPR 9003 du CNRS, Cancerogenese et Mutagenese Moleculaire et Structurale, UPR Conventionnee avec l'Universite Louis Pasteur, ESBS, Blvd S. Brant, 67400 Strasbourg, France.

Oncogene
|December 17, 2002
PubMed

Insights

DNA damage is repaired by specialized enzymes, but some lesions persist. Translesion Synthesis (TLS) polymerases copy past DNA damage, albeit with a risk of mutations, which is a key area of ongoing research.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Genomes face constant damage from internal and external sources, affecting DNA integrity.
  • While DNA repair systems are efficient, some lesions escape removal before replication.
  • Replicative DNA polymerases struggle to bypass DNA lesions, necessitating alternative mechanisms.

Purpose of the Study:

  • To review recent advancements in the genetics and biochemistry of Translesion Synthesis (TLS).
  • To identify and discuss current challenges and hot topics in TLS research.

Main Methods:

  • Review of current literature on Translesion Synthesis.
  • Analysis of genetic and biochemical data related to TLS polymerases.

Main Results:

  • Discovery of specialized DNA polymerases that facilitate Translesion Synthesis (TLS).
  • TLS polymerases possess relaxed fidelity, enabling bypass of DNA lesions.
  • TLS activity carries a significant risk of inducing mutations due to low fidelity.

Conclusions:

  • Translesion Synthesis is a critical cellular mechanism for replicating damaged DNA.
  • The relaxed fidelity of TLS polymerases is essential for survival but introduces mutagenic potential.
  • Further research is needed to fully understand the genetics, biochemistry, and implications of TLS.

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