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Nat Chem Biol. 2010 May;6(5):359-68. doi: 10.1038/nchembio.345. Epub 2010 Apr 11.

Small-molecule kinase inhibitors provide insight into Mps1 cell cycle function.

Author information

1
Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts, USA.

Abstract

Mps1, a dual-specificity kinase, is required for the proper functioning of the spindle assembly checkpoint and for the maintenance of chromosomal stability. As Mps1 function has been implicated in numerous phases of the cell cycle, the development of a potent, selective small-molecule inhibitor of Mps1 should facilitate dissection of Mps1-related biology. We describe the cellular effects and Mps1 cocrystal structures of new, selective small-molecule inhibitors of Mps1. Consistent with RNAi studies, chemical inhibition of Mps1 leads to defects in Mad1 and Mad2 establishment at unattached kinetochores, decreased Aurora B kinase activity, premature mitotic exit and gross aneuploidy, without any evidence of centrosome duplication defects. However, in U2OS cells having extra centrosomes (an abnormality found in some cancers), Mps1 inhibition increases the frequency of multipolar mitoses. Lastly, Mps1 inhibitor treatment resulted in a decrease in cancer cell viability.

PMID:
20383151
PMCID:
PMC2857554
DOI:
10.1038/nchembio.345
[Indexed for MEDLINE]
Free PMC Article

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