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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Cooper, Jeremy Tien, Jerry F. Umbreit, Neil T. Gestaut, Daniel R. Franck, Andrew D. Davis, Trisha N. Asbury, Charles L. Wordeman, Linda Gonen, Tamir |
| Description | Author Affiliation: Tien JF ( Department of Biochemistry, University of Washington, Seattle, WA 98195, USA.) |
| Abstract | The coupling of kinetochores to dynamic spindle microtubules is crucial for chromosome positioning and segregation, error correction, and cell cycle progression. How these fundamental attachments are made and persist under tensile forces from the spindle remain important questions. As microtubule-binding elements, the budding yeast Ndc80 and Dam1 kinetochore complexes are essential and not redundant, but their distinct contributions are unknown. In this study, we show that the Dam1 complex is a processivity factor for the Ndc80 complex, enhancing the ability of the Ndc80 complex to form load-bearing attachments to and track with dynamic microtubule tips in vitro. Moreover, the interaction between the Ndc80 and Dam1 complexes is abolished when the Dam1 complex is phosphorylated by the yeast aurora B kinase Ipl1. This provides evidence for a mechanism by which aurora B resets aberrant kinetochore–microtubule attachments. We propose that the action of the Dam1 complex as a processivity factor in kinetochore–microtubule attachment is regulated by conserved signals for error correction. |
| ISSN | 00219525 |
| e-ISSN | 15408140 |
| Journal | The Journal of Cell Biology |
| Issue Number | 4 |
| Volume Number | 189 |
| Language | English |
| Publisher | Rockefeller University Press (United States) |
| Publisher Date | 2010-05-17 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cell Cycle Proteins Metabolism Kinetochores Microtubule-Associated Proteins Microtubules Nuclear Proteins Protein-Serine-Threonine Kinases Saccharomyces Cerevisiae Proteins Aurora Kinases Genetics Green Fluorescent Proteins Saccharomyces Cerevisiae Spindle Apparatus Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Medicine |
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