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Related Experiment Video

Updated: Oct 2, 2025

Genome-wide Snapshot of Chromatin Regulators and States in Xenopus Embryos by ChIP-Seq
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XPG: a multitasking genome caretaker.

Alba Muniesa-Vargas1, Arjan F Theil1, Cristina Ribeiro-Silva1

  • 1Department of Molecular Genetics, Erasmus MC Cancer Institute, Oncode Institute, Erasmus University Medical Center, Rotterdam, The Netherlands.

Cellular and Molecular Life Sciences : CMLS
|March 1, 2022
PubMed
Summary
This summary is machine-generated.

The XPG/ERCC5 endonuclease plays a crucial role in DNA repair and genome maintenance. This study details its function in nucleotide excision repair and its additional roles in replication fork protection and R-loop resolution.

Keywords:
DNA damage responseNERStructureXPG/ERCC5Xeroderma pigmentosum–Cockayne syndrome

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • XPG/ERCC5 endonuclease identified as the gene for Xeroderma Pigmentosum group G.
  • Extensive studies elucidated its role in DNA damage excision during nucleotide excision repair (NER) with ERCC1-XPF.
  • Emerging evidence highlights XPG's functions beyond NER in genome maintenance.

Purpose of the Study:

  • To provide an overview of XPG's multifaceted roles in genome maintenance.
  • To detail the regulation of XPG's activity in NER.
  • To present evidence for XPG functions independent of NER.

Main Methods:

  • Biochemical studies
  • Structural analyses
  • Cell biological investigations

Main Results:

  • XPG is essential for DNA repair via NER.
  • XPG protects replication forks through homologous recombination.
  • XPG resolves R-loops, contributing to genome stability.

Conclusions:

  • XPG exhibits diverse functions in genome maintenance beyond its canonical NER role.
  • Understanding XPG's regulation and non-NER functions is critical.
  • Inherited XPG deficiency leads to various disease phenotypes, linked to its diverse cellular roles.