Cdc42 and mDia3 regulate microtubule attachment to kinetochores

Shingo Yasuda, Fabian Oceguera-Yanez, Takayuki Kato, Muneo Okamoto, Shigenobu Yonemura, Yasuhiko Terada, Toshimasa Ishizaki, Shuh Narumiya

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155 Citations (Scopus)

Abstract

During mitosis, the mitotic spindle, a bipolar structure composed of microtubules (MTs) and associated motor proteins, segregates sister chromatids to daughter cells. Initially some MTs emanating from one centrosome attach to the kinetochore at the centromere of one of the duplicated chromosomes. This attachment allows rapid poleward movement of the bound chromosome. Subsequent attachment of the sister kinetochore to MTs growing from the other centrosome results in the bi-orientation of the chromosome, in which interactions between kinetochores and the plus ends of MTs are formed and stabilized. These processes ensure alignment of chromosomes during metaphase and their correct segregation during anaphase. Although many proteins constituting the kinetochore have been identified and extensively studied, the signalling responsible for MT capture and stabilization is unclear. Small GTPases of the Rho family regulate cell morphogenesis by organizing the actin cytoskeleton and regulating MT alignment and stabilization. We now show that one member of this family, Cdc42, and its effector, mDia3, regulate MT attachment to kinetochores.

Original languageEnglish
Pages (from-to)767-771
Number of pages5
JournalNature
Volume428
Issue number6984
DOIs
Publication statusPublished - 2004 Apr 15

ASJC Scopus subject areas

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    Yasuda, S., Oceguera-Yanez, F., Kato, T., Okamoto, M., Yonemura, S., Terada, Y., Ishizaki, T., & Narumiya, S. (2004). Cdc42 and mDia3 regulate microtubule attachment to kinetochores. Nature, 428(6984), 767-771. https://doi.org/10.1038/nature02452