Kinetochores coordinate pericentromeric cohesion and early DNA replication by Cdc7-Dbf4 kinase recruitment.
Mol Cell
; 50(5): 661-74, 2013 Jun 06.
Article
em En
| MEDLINE
| ID: mdl-23746350
Centromeres play several important roles in ensuring proper chromosome segregation. Not only do they promote kinetochore assembly for microtubule attachment, but they also support robust sister chromatid cohesion at pericentromeres and facilitate replication of centromeric DNA early in S phase. However, it is still elusive how centromeres orchestrate all these functions at the same site. Here, we show that the budding yeast Dbf4-dependent kinase (DDK) accumulates at kinetochores in telophase, facilitated by the Ctf19 kinetochore complex. This promptly recruits Sld3-Sld7 replication initiator proteins to pericentromeric replication origins so that they initiate replication early in S phase. Furthermore, DDK at kinetochores independently recruits the Scc2-Scc4 cohesin loader to centromeres in G1 phase. This enhances cohesin loading and facilitates robust pericentromeric cohesion in S phase. Thus, we have found the central mechanism by which kinetochores orchestrate early S phase DNA replication and robust sister chromatid cohesion at microtubule attachment sites.
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Base de dados:
MEDLINE
Assunto principal:
Saccharomyces cerevisiae
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Proteínas Serina-Treonina Quinases
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Cinetocoros
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Proteínas de Ciclo Celular
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Proteínas de Saccharomyces cerevisiae
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Replicação do DNA
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article