期刊
JOURNAL OF CELL BIOLOGY
卷 204, 期 6, 页码 947-963出版社
ROCKEFELLER UNIV PRESS
DOI: 10.1083/jcb.201307119
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资金
- National Institutes of Health [GM063045]
- Altria Group
- Robert R. Wagner Fellowship Fund
The Aurora B kinase coordinates kinetochore-microtubule attachments with spindle checkpoint signaling on each mitotic chromosome. We find that EB1, a microtubule plus end-tracking protein, is required to enrich Aurora B at inner centromeres in a microtubule-dependent manner. This regulates phosphorylation of both kinetochore and chromatin substrates. EB1 regulates the histone phosphorylation marks (histone H2A phospho-Thr120 and histone H3 phospho-Thr3) that localize Aurora B. The chromosomal passenger complex containing Aurora B can be found on a subset of spindle microtubules that exist near prometaphase kinetochores, known as preformed K-fibers (kinetochore fibers). Our data suggest that EB1 enables the spindle microtubules to regulate the phosphorylation of kinetochores through recruitment of the Aurora B kinase.
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