Principles of chromosome organization for meiotic recombination

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • Mathilde Biot - , University of Montpellier (Author)
  • Attila Toth - , Institute of Physiological Chemistry (Author)
  • Christine Brun - , University of Montpellier (Author)
  • Leon Guichard - , University of Montpellier (Author)
  • Bernard de Massy - , University of Montpellier (Author)
  • Corinne Grey - , University of Montpellier (Author)

Abstract

In meiotic cells, chromosomes are organized as chromatin loop arrays anchored to a protein axis. This organization is essential to regulate meiotic recombination, from DNA double-strand break (DSB) formation to their repair. In mammals, it is unknown how chromatin loops are organized along the genome and how proteins participating in DSB formation are tethered to the chromosome axes. Here, we identify three categories of axis-associated genomic sites: PRDM9 binding sites, where DSBs form; binding sites of the insulator protein CTCF; and H3K4me3-enriched sites. We demonstrate that PRDM9 promotes the recruitment of MEI4 and IHO1, two proteins essential for DSB formation. In turn, IHO1 anchors DSB sites to the axis components HORMAD1 and SYCP3. We discovered that IHO1, HORMAD1, and SYCP3 are associated at the DSB ends during DSB repair. Our results highlight how interactions of proteins with specific genomic elements shape the meiotic chromosome organization for recombination.

Details

Original languageEnglish
Pages (from-to)1826-1841.e5
JournalMolecular cell
Volume84
Issue number10
Publication statusPublished - 16 May 2024
Peer-reviewedYes

External IDs

Scopus 85192336629

Keywords

Keywords

  • Animals, Binding Sites, CCCTC-Binding Factor/metabolism, Cell Cycle Proteins/metabolism, Chromatin/metabolism, Chromosomes/genetics, DNA Breaks, Double-Stranded, DNA-Binding Proteins/metabolism, Histone-Lysine N-Methyltransferase/genetics, Histones/metabolism, Humans, Male, Meiosis/genetics, Mice, Nuclear Proteins/genetics, Recombination, Genetic

Library keywords