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Mps1 is a kinetochore-associated kinase essential for the vertebrate mitotic checkpoint.

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Affiliations

  • 1. Ludwig Institute for Cancer Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA 92093, USA.
      Authors
    • Abrieu A 1
    (1 author)

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Cell, 01 Jul 2001, 106(1):83-93
https://doi.org/10.1016/s0092-8674(01)00410-x PMID: 11461704 

Abstract 

The mitotic checkpoint acts to inhibit entry into anaphase until all chromosomes have successfully attached to spindle microtubules. Unattached kinetochores are believed to release an activated form of Mad2 that inhibits APC/C-dependent ubiquitination and subsequent proteolysis of components needed for anaphase onset. Using Xenopus egg extracts, a vertebrate homolog of yeast Mps1p is shown here to be a kinetochore-associated kinase, whose activity is necessary to establish and maintain the checkpoint. Since high levels of Mad2 overcome checkpoint loss in Mps1-depleted extracts, Mps1 acts upstream of Mad2-mediated inhibition of APC/C. Mps1 is essential for the checkpoint because it is required for recruitment and retention of active CENP-E at kinetochores, which in turn is necessary for kinetochore association of Mad1 and Mad2.

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Read article at publisher's site: https://doi.org/10.1016/s0092-8674(01)00410-x

Read article for free, from open access legal sources, via Unpaywall: http://www.cell.com/article/S009286740100410X/pdfUnpaywall

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