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Current Biology
Article
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Current Biology
Article . 2011
License: Elsevier Non-Commercial
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Current Biology
Article . 2011 . Peer-reviewed
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CENP-C Is a Structural Platform for Kinetochore Assembly

Authors: Przewloka, Marcin R.; Venkei, Zsolt; Bolanos-Garcia, Victor M.; Debski, Janusz; Dadlez, Michal; Glover, David;

CENP-C Is a Structural Platform for Kinetochore Assembly

Abstract

Centromeres provide a region of chromatin upon which kinetochores are assembled in mitosis. Centromeric protein C (CENP-C) is a core component of this centromeric chromatin that, when depleted, prevents the proper formation of both centromeres and kinetochores. CENP-C localizes to centromeres throughout the cell cycle via its C-terminal part, whereas its N-terminal part appears necessary for recruitment of some but not all components of the Mis12 complex of the kinetochore. We now find that all kinetochore proteins belonging to the KMN (KNL1/Spc105, the Mis12 complex, and the Ndc80 complex) network bind to the N-terminal part of Drosophila CENP-C. Moreover, we show that the Mis12 complex component Nnf1 interacts directly with CENP-C in vitro. To test whether CENP-C's N-terminal part was sufficient to recruit KMN proteins, we targeted it to the centrosome by fusing it to a domain of Plk4 kinase. The Mis12 and Ndc80 complexes and Spc105 protein were then all recruited to centrosomes at the expense of centromeres, leading to mitotic abnormalities typical of cells with defective kinetochores. Thus, the N-terminal part of Drosophila CENP-C is sufficient to recruit core kinetochore components and acts as the principal linkage between centromere and kinetochore during mitosis.

Keywords

570, Agricultural and Biological Sciences(all), Biochemistry, Genetics and Molecular Biology(all), Chromosomal Proteins, Non-Histone, Blotting, Western, Fluorescent Antibody Technique, Mitosis, Cell Cycle Proteins, 540, Mass Spectrometry, Multiprotein Complexes, Image Processing, Computer-Assisted, Animals, Drosophila, Cloning, Molecular, Kinetochores, Microtubule-Associated Proteins, DNA Primers

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
240
Top 1%
Top 10%
Top 1%
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