CENP-A and CENP-B collaborate to create an open centromeric chromatin state.
CENP-A and CENP-B collaborate to create an open centromeric chromatin state.
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CENP-A和CENP-B合作创建开放的着丝粒染色质状态。
DOI:
10.1038/s41467-023-43739-5
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发表时间:
2023-12-12
影响因子:
16.6
通讯作者:
Fierz, Beat
中科院分区:
文献类型:
--
作者:
Nagpal, Harsh;Ali-Ahmad, Ahmad;Hirano, Yasuhiro;Cai, Wei;Halic, Mario;Fukagawa, Tatsuo;Sekulic, Nikolina;Fierz, Beat
Centromeres are epigenetically defined via the presence of the histone H3 variant CENP-A. Contacting CENP-A nucleosomes, the constitutive centromere associated network (CCAN) and the kinetochore assemble, connecting the centromere to spindle microtubules during cell division. The DNA-binding centromeric protein CENP-B is involved in maintaining centromere stability and, together with CENP-A, shapes the centromeric chromatin state. The nanoscale organization of centromeric chromatin is not well understood. Here, we use single-molecule fluorescence and cryoelectron microscopy (cryoEM) to show that CENP-A incorporation establishes a dynamic and open chromatin state. The increased dynamics of CENP-A chromatin create an opening for CENP-B DNA access. In turn, bound CENP-B further opens the chromatin fiber structure and induces nucleosomal DNA unwrapping. Finally, removal of CENP-A increases CENP-B mobility in cells. Together, our studies show that the two centromere-specific proteins collaborate to reshape chromatin structure, enabling the binding of centromeric factors and establishing a centromeric chromatin state. Centromeres are defined by the histone variant CENP-A. Using single-molecule fluorescence and cryoEM, this study shows that CENP-A and the centromeric protein CENP-B collaborate to create dynamic and open chromatin, aiding centromeric factor binding.
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影响因子:
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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.
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Sekulic, Nikolina
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通讯作者:
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7.8
作者:
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