Cryo-electron microscopy structure of the H3-H4 octasome without histones H2A and H2B
Cryo-electron microscopy structure of the H3-H4 octasome without histones H2A and H2B
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不含组蛋白 H2A 和 H2B 的 H3-H4 八体的冷冻电镜结构
DOI:
10.1101/2021.10.27.466091
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Kurumizaka.
中科院分区:
文献类型:
--
作者:
K;Nozawa.;Y;Takizawa.;L;Pierrakeas.;K;Saikusa.;S Akashi.;E;Luk.; H;Kurumizaka.
The canonical nucleosome, which represents the predominant packaging unit in eukaryotic chromatin, has an octameric core made up of two histone H2A-H2B and H3-H4 dimers with ~147 base-pair (bp) DNA wrapping around it. Non-nucleosome particles with alterative histone stoichiometries and DNA wrapping configurations have been found, and they could profoundly influence genome architecture and function. Here we solved the structure of the H3-H4 octasome, which is a nucleosome-like particle with a core made up of four H3-H4 dimers. Two conformations, open and closed, are determined at 3.9 Å and 3.6 Å resolutions by cryo-electron microscopy, respectively. The H3-H4 octasome, made up of a di-tetrameric core, is wrapped by ~120 bp DNA in 1.5 negative superhelical turns. The symmetrical halves are connected by a unique H4-H4’ interface along the dyad axis.In vivocrosslinking of cysteine probes placed at another unique H3-H3’ interface demonstrated the existence of the H3-H4 octasome in cells.
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影响因子:
3
作者:
Mastronarde, DN
通讯作者:
Mastronarde, DN
DOI:
10.1038/nrm.2017.47
发表时间:
2017-09
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1073/pnas.88.23.10596
发表时间:
1991-12-01
影响因子:
11.1
作者:
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通讯作者:
VANHOLDE, KE
DOI:
10.1038/nrm3382
发表时间:
2012-06-22
期刊:
Nature reviews. Molecular cell biology
影响因子:
--
作者:
通讯作者:
--
影响因子:
14.9
作者:
R. Simon;R. Camerini‐Otero;G. Felsenfeld
通讯作者:
G. Felsenfeld