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EMBO Rep. 2012 Sep;13(9):847-54. doi: 10.1038/embor.2012.93. Epub 2012 Jun 26.

Mps1 promotes rapid centromere accumulation of Aurora B.

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1
Department of Medical Oncology, University Medical Center Utrecht, Universiteitsweg 100, STR 2.129, 3584 CG Utrecht, The Netherlands.

Abstract

Aurora B localization to mitotic centromeres, which is required for proper chromosome alignment during mitosis, relies on Haspin-dependent histone H3 phosphorylation and on Bub1-dependent histone H2A phosphorylation--which interacts with Borealin through a Shugoshin (Sgo) intermediate. We demonstrate that Mps1 stimulates the latter recruitment axis. Mps1 activity enhances H2A-T120ph and is critical for Sgo1 recruitment to centromeres, thereby promoting Aurora B centromere recruitment in early mitosis. Importantly, chromosome biorientation defects caused by Mps1 inhibition are improved by restoring Aurora B centromere recruitment. As Mps1 kinetochore localization reciprocally depends on Aurora B, we propose that this Aurora B-Mps1 recruitment circuitry cooperates with the Aurora B-Haspin feedback loop to ensure rapid centromere accumulation of Aurora B at the onset of mitosis.

PMID:
22732840
PMCID:
PMC3432816
DOI:
10.1038/embor.2012.93
[Indexed for MEDLINE]
Free PMC Article
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