PRC1 and PRC2 are not required for targeting of H2A.Z to developmental genes in embryonic stem cells.

PRC1 and PRC2 are not required for targeting of H2A.Z to developmental genes in embryonic stem cells.
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DOI:
10.1371/journal.pone.0034848
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Eskeland R
Eskeland R
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Illingworth RS;Botting CH;Grimes GR;Bickmore WA;Eskeland R

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基本组蛋白变体H2A。Z定位于活性和沉默的染色质位点。在胚胎干细胞中,H2A。据报道,Z也与发育沉默基因上的多梳抑制复合体2 (PRC2)共定位。H2A的作用机理。Z靶向尚不清楚,但PRC2成分Suz12的作用已被提出。鉴于这种关联,我们希望确定polycomb是否在功能上指导H2A。ESCs中的Z结合。我们证明了PRC1组分Ring1B与ESCs中的多个复合物相互作用。此外,我们表明,尽管H2A的基因组分布。Z与PRC2, Ring1B和CpG岛的存在,H2A共定位。在没有Suz12、Eed (PRC2)或Ring1B (PRC1)的情况下,Z仍然覆盖多梳靶位点。因此我们得出结论,H2A。在胚胎干细胞中,Z以多梳独立的方式在发育沉默基因上积累。
The essential histone variant H2A.Z localises to both active and silent chromatin sites. In embryonic stem cells (ESCs), H2A.Z is also reported to co-localise with polycomb repressive complex 2 (PRC2) at developmentally silenced genes. The mechanism of H2A.Z targeting is not clear, but a role for the PRC2 component Suz12 has been suggested. Given this association, we wished to determine if polycomb functionally directs H2A.Z incorporation in ESCs. We demonstrate that the PRC1 component Ring1B interacts with multiple complexes in ESCs. Moreover, we show that although the genomic distribution of H2A.Z co-localises with PRC2, Ring1B and with the presence of CpG islands, H2A.Z still blankets polycomb target loci in the absence of Suz12, Eed (PRC2) or Ring1B (PRC1). Therefore we conclude that H2A.Z accumulates at developmentally silenced genes in ESCs in a polycomb independent manner.
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RING1B对于调节发育控制基因和PRC1蛋白而言至关重要,而不是胚胎细胞中的X失活。
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