The kinetochore prevents centromere-proximal crossover recombination during meiosis

Nadine Vincenten, Lisa Marie Kuhl, Isabel Lam, Ashwini Oke, Alastair R.W. Kerr, Andreas Hochwagen, Jennifer Fung, Scott Keeney, Gerben Vader, Adèle L. Marston*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

During meiosis, crossover recombination is essential to link homologous chromosomes and drive faithful chromosome segregation. Crossover recombination is non-random across the genome, and centromere-proximal crossovers are associated with an increased risk of aneuploidy, including Trisomy 21 in humans. Here, we identify the conserved Ctf19/CCAN kinetochore sub-complex as a major factor that minimizes potentially deleterious centromere-proximal crossovers in budding yeast. We uncover multi-layered suppression of pericentromeric recombination by the Ctf19 complex, operating across distinct chromosomal distances. The Ctf19 complex prevents meiotic DNA break formation, the initiating event of recombination, proximal to the centromere. The Ctf19 complex independently drives the enrichment of cohesin throughout the broader pericentromere to suppress crossovers, but not DNA breaks. This non-canonical role of the kinetochore in defining a chromosome domain that is refractory to crossovers adds a new layer of functionality by which the kinetochore prevents the incidence of chromosome segregation errors that generate aneuploid gametes.

Original languageEnglish
Article numbere10850
JournaleLife
Volume4
Issue numberDECEMBER2015
DOIs
Publication statusPublished - 14 Dec 2015
Externally publishedYes

Cite this

Vincenten, N., Kuhl, L. M., Lam, I., Oke, A., Kerr, A. R. W., Hochwagen, A., ... Marston, A. L. (2015). The kinetochore prevents centromere-proximal crossover recombination during meiosis. eLife, 4(DECEMBER2015), [e10850]. https://doi.org/10.7554/eLife.10850