Induced ectopic kinetochore assembly bypasses the requirement for CENP-A nucleosomes.
Induced ectopic kinetochore assembly bypasses the requirement for CENP-A nucleosomes.
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DOI:
10.1016/j.cell.2011.03.031
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发表时间:
2011-04-29
期刊:
影响因子:
64.5
通讯作者:
Cheeseman IM
中科院分区:
文献类型:
--
作者:
Gascoigne KE;Takeuchi K;Suzuki A;Hori T;Fukagawa T;Cheeseman IM
Accurate chromosome segregation requires assembly of the multi-protein kinetochore complex at centromeres. Although prior work identified the centromeric histone H3-variant CENP-A as the important upstream factor necessary for centromere specification, in human cells CENP-A is not sufficient for kinetochore assembly. Here, we demonstrate that two constitutive DNA-binding kinetochore components, CENP-C and CENP-T, function to direct kinetochore formation. Replacing the DNA-binding regions of CENP-C and CENP-T with alternate chromosome-targeting domains recruits these proteins to ectopic loci, resulting in CENP-A-independent kinetochore assembly. These ectopic kinetochore-like foci are functional based on the stoichiometric assembly of multiple kinetochore components including the microtubule-binding KMN network, the presence of microtubule attachments, the microtubule-sensitive recruitment of the spindle checkpoint protein Mad2, and the segregation behavior of foci-containing chromosomes. We additionally find that CENP-T phosphorylation regulates the mitotic assembly of both endogenous and ectopic kinetochores. Thus, CENP-C and CENP-T form a critical regulated platform for vertebrate kinetochore assembly.
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影响因子:
21.3
作者:
Carroll, Christopher W.;Silva, Mariana C. C.;Godek, Kristina M.;Jansen, Lars E. T.;Straight, Aaron F.
通讯作者:
Straight, Aaron F.
DOI:
10.1083/jcb.201001013
发表时间:
2010-06-28
期刊:
The Journal of cell biology
影响因子:
--
作者:
Carroll CW;Milks KJ;Straight AF
通讯作者:
Straight AF
影响因子:
11.4
作者:
Fukagawa, T;Mikami, Y;Ikemura, T
通讯作者:
Ikemura, T
影响因子:
64.5
作者:
Ciferri, Claudio;Pasqualato, Sebastiano;Musacchio, Andrea
通讯作者:
Musacchio, Andrea
影响因子:
64.5
作者:
Hori, Tetsuya;Amano, Miho;Fukagawa, Tatsuo
通讯作者:
Fukagawa, Tatsuo