Genetic analysis of nucleotide excision repair in mammalian cells

G Weeda1, J H Hoeijmakers

  • 1Department of Cell Biology and Genetics, Erasmus University, Rotterdam, The Netherlands.

Insights

Nucleotide excision repair (NER) is a vital DNA repair system protecting against environmental damage and cellular mutations. Understanding NER gene function is crucial for preventing diseases like cancer.

Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • DNA damage from environmental factors and cellular processes can cause mutations.
  • Unrepaired DNA lesions disrupt critical cellular functions like transcription and replication.
  • Defective DNA repair mechanisms are linked to genetic disorders and increased cancer risk.

Purpose of the Study:

  • To review the advancements in understanding nucleotide excision repair.
  • To detail the journey from gene cloning to functional characterization of NER genes.

Main Methods:

  • Literature review of nucleotide excision repair research.
  • Analysis of gene cloning and characterization studies.
  • Synthesis of current knowledge on NER pathway functions.

Main Results:

  • Significant progress has been made in identifying and characterizing NER genes.
  • The complex mechanisms and functions of the NER pathway are increasingly understood.

Conclusions:

  • Nucleotide excision repair is a fundamental process for maintaining genomic stability.
  • Continued research into NER is essential for understanding and treating DNA repair-related diseases.

Related Concept Videos

Nucleotide Excision Repair01:08

Nucleotide Excision Repair

Overview
Base Excision Repair01:54

Base Excision Repair

One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
Long-patch Base Excision Repair01:02

Long-patch Base Excision Repair

Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
Nucleotide Excision Repair01:08

Nucleotide Excision Repair

Overview
Base Excision Repair01:54

Base Excision Repair

One of the common DNA damages is the chemical alteration of single bases by alkylation, oxidation, or deamination. The altered bases cause mispairing and strand breakage during replication. This type of damage causes minimal change to the DNA double helix structure and can be repaired by the base excision repair (BER) pathways. BER corrects damaged DNA sequences by removing the damaged base and restoring the original base sequence using the complementary strand as a template.
The first step of...
Nucleotide Excision Repair01:38

Nucleotide Excision Repair

DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...