Epigenetic centromere propagation and the nature of CENP-a nucleosomes.

Epigenetic centromere propagation and the nature of CENP-a nucleosomes.
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DOI:
10.1016/j.cell.2011.02.002
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发表时间:
2011-02-18
期刊:
影响因子:
64.5
通讯作者:
Cleveland DW
Cleveland DW
中科院分区:
生物学1区
文献类型:
--
作者:
Black BE;Cleveland DW

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Centromeres direct chromosome inheritance, but in multicellular organisms their positions on chromosomes are primarily specified epigenetically rather than by a DNA sequence. The major candidate for the epigenetic mark is chromatin assembled with the histone H3 variant, CENP-A. Recent studies offer conflicting evidence for the structure of CENP-A containing chromatin, including the histone composition and handedness of the DNA wrapped around the histones. We present a model for the assembly and deposition of centromeric nucleosomes that couples these processes to the cell cycle. This model not only reconciles the divergent data for the CENP-A containing nucleosomes but also provides insights about how centromere identity is stably inherited.
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