Related Experiment Video

Updated: Jun 23, 2026

Characterizing DNA Repair Processes at Transient and Long-lasting Double-strand DNA Breaks by Immunofluorescence Microscopy
08:31

Characterizing DNA Repair Processes at Transient and Long-lasting Double-strand DNA Breaks by Immunofluorescence Microscopy

Published on: June 8, 2018

DNA repair: a riddle at a double-strand break

Kevin Hiom1

  • 1MRC Laboratory of Molecular Biology, Cambridge, UK. hiom@mrc-lmb.cam.ac.uk

Current Biology : CB
|May 5, 2009
PubMed

Insights

Researchers discovered a new enzyme, RIDDLIN, that helps build DNA repair complexes. This enzyme is part of a ubiquitin-signaling pathway that activates DNA repair at double-strand breaks.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Genetics

Background:

  • Ubiquitin accumulation is a known hallmark of DNA damage sites.
  • Cellular mechanisms for assembling DNA repair complexes are crucial for genomic stability.

Purpose of the Study:

  • To identify novel components of the DNA damage response pathway.
  • To elucidate the role of ubiquitin signaling in DNA double-strand break repair.

Main Methods:

  • Identification and characterization of the ubiquitin ligase RIDDLIN.
  • Investigating the function of RIDDLIN in DNA repair complex assembly.
  • Analysis of ubiquitin signaling dynamics at DNA damage sites.

Main Results:

  • RIDDLIN was identified as a novel ubiquitin ligase.
  • RIDDLIN is recruited to DNA double-strand breaks.
  • Evidence for a ubiquitin-signaling cascade regulating DNA repair complex formation.

Conclusions:

  • RIDDLIN plays a key role in the ubiquitin-mediated regulation of DNA repair.
  • The discovery of RIDDLIN provides new insights into the DNA damage response.
  • Ubiquitin signaling is essential for efficient DNA double-strand break repair.

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