Vertebrate centromeres in mitosis are functionally bipartite structures stabilized by cohesin

Carlos Sacristan, Kumiko Samejima, Lorena Andrade Ruiz, Moonmoon Deb, Maaike L A Lambers, Adam Buckle, Chris A Brackley, Daniel Robertson, Tetsuya Hori, Shaun Webb, Robert Kiewisz, Tristan Bepler, Eloïse van Kwawegen, Patrik Risteski, Kruno Vukušić, Iva M Tolić, Thomas Müller-Reichert, Tatsuo Fukagawa, Nick Gilbert, Davide MarenduzzoWilliam C Earnshaw, Geert J P L Kops

Onderzoeksoutput: Bijdrage aan wetenschappelijk tijdschrift/periodieke uitgaveArtikelWetenschappelijkpeer review

11 Citaten (Scopus)

Samenvatting

Centromeres are scaffolds for the assembly of kinetochores that ensure chromosome segregation during cell division. How vertebrate centromeres obtain a three-dimensional structure to accomplish their primary function is unclear. Using super-resolution imaging, capture-C, and polymer modeling, we show that vertebrate centromeres are partitioned by condensins into two subdomains during mitosis. The bipartite structure is found in human, mouse, and chicken cells and is therefore a fundamental feature of vertebrate centromeres. Super-resolution imaging and electron tomography reveal that bipartite centromeres assemble bipartite kinetochores, with each subdomain binding a distinct microtubule bundle. Cohesin links the centromere subdomains, limiting their separation in response to spindle forces and avoiding merotelic kinetochore-spindle attachments. Lagging chromosomes during cancer cell divisions frequently have merotelic attachments in which the centromere subdomains are separated and bioriented. Our work reveals a fundamental aspect of vertebrate centromere biology with implications for understanding the mechanisms that guarantee faithful chromosome segregation.

Originele taal-2Engels
Pagina's (van-tot)3006-3023.e26
TijdschriftCell
Volume187
Nummer van het tijdschrift12
DOI's
StatusGepubliceerd - 06 jun. 2024

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