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RSK2 is a kinetochore-associated protein that participates in the spindle assembly checkpoint

Oncogene volume 29, pages 3566–3574 (2010)Cite this article

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Abstract

The spindle assembly checkpoint (SAC) prevents anaphase onset until all the chromosomes have successfully attached to the spindle microtubules. The MAP kinase (MAPK) is an important player in this pathway, however its exact role is not fully understood. One major target of MAPK is the p90 ribosomal protein S6 kinase (RSKs) family. In this study, we analyse whether Rsk2 could participate in the activation of the SAC. Our data indicate that this protein is localized at the kinetochores under checkpoint conditions. Moreover, it is essential for the SAC activity in Xenopus egg extracts as its depletion prevents metaphase arrest as well as the kinetochore localization of the other SAC components. We also show that this kinase might also participate in the maintenance of the SAC in mammalian cells as Rsk2 knockdown in these cells prevents the kinetochore localization of Mad1, Mad2 and CENP-E under checkpoint conditions.

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Acknowledgements

We thank Dr JE Ferrell for the generous gift of the pFast-Rsk2 WT and the pFast-Rsk2 KD constructs. We thank Julian Cau from the Montpellier RIO Imaging facility (CRBM). This work was supported by the Ligue Nationale Contre le Cancer (Equipe Labellisée). AB and EB are fellows from the Fondation pour la Recherche Medicale and the Ligue Nationale Contre le Cancer, respectively.

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Author notes

  1. S Vigneron and E Brioudes: These authors contributed equally to this work.

Authors and Affiliations

  1. Universités Montpellier 2 et 1, Centre de Recherche de Biochimie Macromoléculaire, CNRS UMR 5237, Montpellier cedex 5, France

    S Vigneron, E Brioudes, A Burgess, J-C Labbé, T Lorca & A Castro

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  1. S Vigneron
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  2. E Brioudes
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  3. A Burgess
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  4. J-C Labbé
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  5. T Lorca
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  6. A Castro
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Correspondence to T Lorca or A Castro.

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Supplementary Information accompanies the paper on the Oncogene website

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Vigneron, S., Brioudes, E., Burgess, A. et al. RSK2 is a kinetochore-associated protein that participates in the spindle assembly checkpoint. Oncogene 29, 3566–3574 (2010). https://doi.org/10.1038/onc.2010.105

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  • DOI: https://doi.org/10.1038/onc.2010.105

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