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Polo-Like Kinase Cdc5 Controls the Local Activation of Rho1 to Promote Cytokinesis
Satoshi Yoshida,1Keiko Kono,1,2Drew M. Lowery,3Sara Bartolini,1Michael B. Yaffe,3Yoshikazu Ohya,2David Pellman1*
The links between the cell cycle machinery and the cytoskeletalproteins controlling cytokinesis are poorly understood. Thesmall guanine nucleotide triphosphate (GTP)binding proteinRhoA stimulates type II myosin contractility and formin-dependentassembly of the cytokinetic actin contractile ring. We foundthat budding yeast Polo-like kinase Cdc5 controls the targetingand activation of Rho1 (RhoA) at the division site via Rho1guanine nucleotide exchange factors. This role of Cdc5 (Polo-likekinase) in regulating Rho1 is likely to be relevant to cytokinesisand asymmetric cell division in other organisms.
1 Department of Pediatric Oncology, Dana-Farber Cancer Institute and Division of Hematology/Oncology, Children's Hospital Boston and Harvard Medical School, Boston, MA 02115, USA. 2 Department of Integrated Biosciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba 277-8562, Japan. 3 Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
* To whom correspondence should be addressed. E-mail: david_pellman{at}dfci.harvard.edu
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S. M. Buttery, S. Yoshida, and D. Pellman (2007)
Mol. Biol. Cell
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Chemical genetics reveals the requirement for Polo-like kinase 1 activity in positioning RhoA and triggering cytokinesis in human cells.
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PNAS
104, 4383-4388
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