A global view of human centromere variation and evolution.

Human centromeres exhibit extensive diversity with 226 haplotypes and up to 6% featuring di-kinetochore structures across populations.

• Why it matters: Understanding centromere variation is crucial because these regions are vital for chromosome segregation, yet their repetitive nature has limited comprehensive analysis, hindering insights into their evolution and stability.
• What they did: By assembling and analyzing 2,110 centromeres from diverse individuals using specialized bioinformatics, the study identified sequence variations, kinetochore configurations, and compared these to a large reference set, including mutation rates and introgression evidence.
• The result: Findings reveal rapid mutation rates, especially at kinetochore sites, and suggest an evolutionary 'arms race' that drives centromere diversity, providing a foundation for understanding chromosome stability and evolution.