RNA is essential for PRC2 chromatin occupancy and function in human pluripotent stem cells.

RNA is essential for PRC2 chromatin occupancy and function in human pluripotent stem cells.
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DOI:
10.1038/s41588-020-0662-x
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发表时间:
2020-09
期刊:
影响因子:
30.8
通讯作者:
Cech, Thomas R.
Cech, Thomas R.
中科院分区:
生物学1区
文献类型:
--
作者:
Long, Yicheng;Hwang, Taeyoung;Gooding, Anne R.;Goodrich, Karen J.;Rinn, John L.;Cech, Thomas R.

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许多调节转录的染色质结合蛋白和蛋白质复合物也结合RNA。其中之一,多梳抑制复合物2(PRC 2),沉积兼性异染色质的H3 K27 me 3标记,是干细胞分化所需的。PRC 2在体内和体外广泛结合RNA。然而,这种RNA结合的生物学重要性仍然没有解决。在这里,我们通过使用多种互补方法在人类诱导多能干细胞中解决这个问题。RNA酶A、转录的化学抑制剂或RNA结合缺陷突变体对RNA-PRC 2相互作用的干扰都破坏了PRC 2染色质占据和全基因组定位。PRC 2-RNA相互作用的生理相关性进一步通过遗传破坏后的心肌细胞分化缺陷来强调。我们的结论是PRC 2需要RNA结合的染色质定位在人类多能干细胞,反过来定义细胞状态。
Many chromatin-binding proteins and protein complexes that regulate transcription also bind RNA. One of these, Polycomb repressive complex 2 (PRC2), deposits the H3K27me3 mark of facultative heterochromatin and is required for stem cell differentiation. PRC2 binds RNAs broadly in vivo and in vitro. Yet, the biological importance of this RNA binding remains unsettled. Here, we tackle this question in human induced pluripotent stem cells by using multiple complementary approaches. Perturbation of RNA–PRC2 interaction by RNase A, by a chemical inhibitor of transcription or by an RNA-binding-defective mutant all disrupted PRC2 chromatin occupancy and localization genome wide. The physiological relevance of PRC2–RNA interactions is further underscored by a cardiomyocyte differentiation defect upon genetic disruption. We conclude that PRC2 requires RNA binding for chromatin localization in human pluripotent stem cells and in turn for defining cellular state.
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