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TOPOVIBL-REC114 interaction regulates meiotic DNA double-strand breaks.

Alexandre Nore1, Ariadna B Juarez-Martinez2, Julie Clément1

  • 1Institut de Génétique Humaine (IGH), Centre National de la Recherche Scientifique, Univ Montpellier, Montpellier, France.

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|November 17, 2022
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Summary
This summary is machine-generated.

The REC114/TOPOVIBL interaction is crucial for programmed DNA double-strand breaks (DSBs) during meiosis. This interaction ensures the efficiency and timing of DSB formation, vital for fertility and genetic diversity.

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Area of Science:

  • Genetics
  • Molecular Biology
  • Cell Biology

Background:

  • Meiosis requires programmed DNA double-strand breaks (DSBs) for fertility and genetic diversity.
  • The TOPOVIL complex, comprising SPO11 and TOPOVIBL, catalyzes DSB formation.
  • Accessory factors like REC114 regulate DSB formation, but their precise roles are unclear.

Purpose of the Study:

  • To elucidate the role of REC114 in the TOPOVIL complex.
  • To investigate the functional significance of the REC114-TOPOVIBL interaction in meiotic DSB formation.

Main Methods:

  • Structural analysis to identify interacting domains between REC114 and TOPOVIBL.
  • Analysis of meiotic DSB formation in mouse mutants with altered REC114-TOPOVIBL binding.
  • Monitoring DSB activity genome-wide and in specific chromosomal regions (autosomes, subtelomeres).

Main Results:

  • REC114 directly interacts with TOPOVIBL through conserved domains.
  • Mutations disrupting REC114-TOPOVIBL binding significantly reduce DSB activity in oocytes.
  • In spermatocytes, DSB reduction is localized to subtelomeric regions, and autosomal DSB formation is delayed.

Conclusions:

  • REC114 is a key component of the TOPOVIL catalytic complex.
  • The REC114-TOPOVIBL interaction is essential for the efficiency and temporal regulation of meiotic DSB formation.
  • This interaction impacts DSB distribution and timing differently in oocytes and spermatocytes.