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Coupling between nucleotide excision repair and gene expression.

Adrián E Cambindo Botto1, Juan C Muñoz1, Manuel J Muñoz1,2

  • 1a Instituto de Fisiología, Biología Molecular y Neurociencias (IFIBYNE-UBA-CONICET) and Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires, Ciudad Universitaria , Buenos Aires , Argentina.

RNA Biology
|April 24, 2018
PubMed
Summary

Gene expression and DNA repair are intricately linked. Nucleotide Excision Repair (NER) influences gene expression during DNA damage, and its compromise in Xeroderma Pigmentosum (XP) may explain patient heterogeneity.

Keywords:
Gene expressionNucleotide Excision RepairUV lightXeroderma Pigmentosum

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Gene expression and DNA repair are essential cellular processes.
  • Recent evidence highlights complex interplay between transcription and repair.
  • Nucleotide Excision Repair (NER) is a major DNA repair pathway.

Purpose of the Study:

  • To elucidate the molecular mechanisms coupling transcription and DNA repair.
  • To understand how NER influences gene expression in genotoxic conditions.
  • To explore the link between NER deficiency, gene expression dysregulation, and clinical heterogeneity in Xeroderma Pigmentosum (XP).

Main Methods:

  • Review of experimental evidence on transcription-repair coupling.
  • Discussion of molecular mechanisms involving RNA Polymerase II (RNAPII) and NER.
  • Analysis of DNA damage response pathways, including ATR kinase activation.

Main Results:

  • RNAPII-dependent transcription impacts NER efficiency.
  • NER activity, via single-stranded DNA intermediates and ATR activation, modulates gene expression under genotoxic stress.
  • NER dysfunction in XP patients is associated with potential gene expression misregulation.

Conclusions:

  • There is a bidirectional relationship between transcription and NER.
  • Dysregulated gene expression due to compromised NER may contribute to the diverse clinical presentations of Xeroderma Pigmentosum (XP).
  • Further research into this coupling is crucial for understanding DNA repair disorders.