ArticleGenome biology2025
CENP-A/CENP-B uncoupling in the evolutionary reshuffling of centromeres in equids.
Article in Genome biology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed.
- Phased T2T horse and donkey assemblies from a mule reveal peculiar equid centromere evolution.Cell genomics · 2026Article
- Unconventional centromere architectures in Tapirus indicus reveal hotspots for satellite-free centromere formation in Perissodactyla.Communications biology · 2026Article
- 40 years of CENP-A: the foundation of a new era of centromere biology.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2025Article
- Article
- The dynamic centromere.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2025Review
- Centromeres drive and take a break.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2025Review
- CENP-A and centromere evolution in equids.Chromosome research : an international journal on the molecular, supramolecular and evolutionary aspects of chromosome biology · 2025Review
- CENP-A/CENP-B uncoupling in the evolutionary reshuffling of centromeres in equids.Genome biology · 2025Article
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6 authors.
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Abstract
backgroundWhile CENP-A is the epigenetic determinant of the centromeric function, the role of CENP-B, a centromeric protein binding a specific DNA sequence, the CENP-B-box, remains elusive. In the few mammalian species analyzed so far, the CENP-B box is contained in the major satellite repeat that is present at all centromeres, with the exception of the Y chromosome. We previously demonstrated that, in the genus Equus, numerous centromeres lack any satellite repeat.
resultsIn four Equus species, CENP-B is expressed but does not bind the majority of satellite-based centromeres, or the satellite-free ones, while it is localized at several ancestral, now-inactive, centromeres. Centromeres lacking CENP-B are functional and recruit normal amounts of CENP-A and CENP-C. The absence of CENP-B is related to the lack of CENP-B boxes rather than to peculiar features of the protein itself. CENP-B boxes are present in a previously undescribed repeat which is not the major satellite bound by CENP-A. Comparative sequence analysis suggests that this satellite was centromeric in the equid ancestor, lost centromeric function during evolution, and gave rise to a shorter CENP-A bound repeat not containing the CENP-B box but enriched in dyad symmetries.
conclusionsWe propose that the uncoupling between CENP-B and CENP-A may have played a role in the extensive evolutionary reshuffling of equid centromeres. This study provides new insights into the complexity of centromere organization in a largely biodiverse world where the majority of mammalian species still have to be studied.
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