The mouse Mps1p-like kinase regulates centrosome duplication

Harold A. Fisk, Mark Winey

Research output: Contribution to journalArticlepeer-review

192 Scopus citations


The yeast Mps1p protein kinase acts in centrosome duplication and the spindle assembly checkpoint. We demonstrate here that a mouse Mps1p ortholog (esk, which we designate mMps1p) regulates centrosome duplication. Endogenous mMps1p and overexpressed GFP-mMps1p localize to centrosomes and kinetochores in mouse cells. Overexpression of GFP-mMps1p causes reduplication of centrosomes during S phase arrest. In contrast, a kinase-deficient mutant blocks centrosome duplication altogether. Control of centrosome duplication by mMps1p requires a known regulator of the process, Cdk2. Inhibition of Cdk2 prevents centrosome reduplication and destabilizes mMps1p, causing its subsequent loss from centrosomes, suggesting that Cdk2 promotes mMps1p's centrosome duplication function by regulating its stability during S phase. Thus, mMps1p, an in vitro Cdk2 substrate, regulates centrosome duplication jointly with Cdk2.

Original languageEnglish (US)
Pages (from-to)95-104
Number of pages10
Issue number1
StatePublished - Jul 13 2001
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)


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