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SUMO and the DNA damage response.

Jai S Bhachoo1, Alexander J Garvin1

  • 1SUMO Biology Lab, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, West Yorkshire LS2 9JT, U.K.

Biochemical Society Transactions
|April 17, 2024
PubMed
Summary
This summary is machine-generated.

Small ubiquitin-like modifier (SUMO) conjugation is crucial for DNA damage repair (DDR) pathways in mammalian cells. Targeting SUMO machinery offers a promising strategy to enhance cancer therapies by exploiting cancer cells

Keywords:
DNA damage responseDNA synthesis and repairSUMOylationgenome integritypost translational modificationubiquitin signalling

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cell Biology

Background:

  • Genome integrity relies on specialized DNA damage repair (DDR) pathways.
  • Post-translational modifications, particularly SUMOylation, are integral to DDR signalling.
  • SUMOylation affects DNA repair factor recruitment, activity, and complex dynamics.

Purpose of the Study:

  • To review the impact of SUMO signalling on major mammalian DNA repair pathways.
  • To highlight common themes in SUMOylation's role across different DDR mechanisms.
  • To explore the therapeutic potential of targeting SUMO machinery in cancer.

Main Methods:

  • Literature review and synthesis of current research on SUMOylation and DNA repair.
  • Analysis of SUMOylation's influence on protein complex assembly and factor stability.
  • Examination of SUMOylation's interplay with ubiquitination in DDR.

Main Results:

  • SUMOylation is a recurring theme in DNA repair, influencing complex formation and factor turnover.
  • SUMOylation can promote DNA repair factor stability by competing with ubiquitin.
  • SUMOylated DNA repair factors can be subject to ubiquitin-dependent degradation or extraction.

Conclusions:

  • SUMO signalling is a critical regulator of DNA damage repair pathways.
  • Cancer cells exhibit SUMO 'addiction' for maintaining genomic stability.
  • Targeting SUMO pathways presents a viable strategy to augment DNA damaging therapies and exploit repair defects in cancer.