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Functional and spatial regulation of mitotic centromere-associated kinesin by cyclin-dependent kinase 1.

MPG-Autoren
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Friel,  Claire
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

Martin,  Claudia
Max Planck Society;

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Howard,  Jonathon
Max Planck Institute of Molecular Cell Biology and Genetics, Max Planck Society;

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Zitation

Sanhaji, M., Friel, C., Kreis, N.-N., Krämer, A., Martin, C., Howard, J., et al. (2010). Functional and spatial regulation of mitotic centromere-associated kinesin by cyclin-dependent kinase 1. Molecular and Cellular Biology, 30(11), 2594-2607.


Zitierlink: http://hdl.handle.net/21.11116/0000-0001-0B71-4
Zusammenfassung
Mitotic centromere-associated kinesin (MCAK) plays an essential role in spindle formation and in correction of improper microtubule-kinetochore attachments. The localization and activity of MCAK at the centromere/kinetochore are controlled by Aurora B kinase. However, MCAK is also abundant in the cytosol and at centrosomes during mitosis, and its regulatory mechanism at these sites is unknown. We show here that cyclin-dependent kinase 1 (Cdk1) phosphorylates T537 in the core domain of MCAK and attenuates its microtubule-destabilizing activity in vitro and in vivo. Phosphorylation of MCAK by Cdk1 promotes the release of MCAK from centrosomes and is required for proper spindle formation. Interfering with the regulation of MCAK by Cdk1 causes dramatic defects in spindle formation and in chromosome positioning. This is the first study demonstrating that Cdk1 regulates the localization and activity of MCAK in mitosis by directly phosphorylating the catalytic core domain of MCAK.