Phosphorylation of mitotic kinesin-like protein 2 by polo-like kinase 1 is required for cytokinesis
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We have investigated the function of mitotic kinesin-like protein (MKlp) 2, a kinesin localized to the central spindle, and demonstrate that its depletion results in a failure of cleavage furrow ingression and cytokinesis, and disrupts localization of polo-like kinase 1 (Plk1). MKlp2 is a target for Plk1, and phosphorylated MKlp2 binds to the polo box domain of Plk1. Plk1 also binds directly to microtubules and targets to the central spindle via its polo box domain, and this interaction controls the activity of Plk1 toward MKlp2. An antibody to the neck region of MKlp2 that prevents phosphorylation of MKlp2 by Plk1 causes a cytokinesis defect when introduced into cells. We propose that phosphorylation of MKlp2 by Plk1 is necessary for the spatial restriction of Plk1 to the central spindle during anaphase and telophase, and the complex of these two proteins is required for cytokinesis.
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NEEF, Rüdiger, Christian PREISINGER, Josephine SUTCLIFFE, Robert KOPAJTICH, Erich A. NIGG, Thomas U. MAYER, Francis A. BARR, 2003. Phosphorylation of mitotic kinesin-like protein 2 by polo-like kinase 1 is required for cytokinesis. In: The Journal of Cell Biology. 2003, 162(5), pp. 863-876. ISSN 0021-9525. Available under: doi: 10.1083/jcb.200306009BibTex
@article{Neef2003-09-01Phosp-14050, year={2003}, doi={10.1083/jcb.200306009}, title={Phosphorylation of mitotic kinesin-like protein 2 by polo-like kinase 1 is required for cytokinesis}, number={5}, volume={162}, issn={0021-9525}, journal={The Journal of Cell Biology}, pages={863--876}, author={Neef, Rüdiger and Preisinger, Christian and Sutcliffe, Josephine and Kopajtich, Robert and Nigg, Erich A. and Mayer, Thomas U. and Barr, Francis A.} }
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