PCGF5 is required for neural differentiation of embryonic stem cells.

PCGF5 is required for neural differentiation of embryonic stem cells.
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PCGF5是胚胎干细胞神经分化所必需的

DOI:
10.1038/s41467-018-03781-0
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发表时间:
2018-05-15
影响因子:
16.6
通讯作者:
Yao H
Yao H
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yao M;Zhou X;Zhou J;Gong S;Hu G;Li J;Huang K;Lai P;Shi G;Hutchins AP;Sun H;Wang H;Yao H

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多梳阻遏复合物1(PRC 1)是基因表达和发育的重要调控因子。PRC 1含有E3连接酶RING 1A/B,其在组蛋白H2 A(H2 AK 119 ub 1)处单泛素化赖氨酸119,并且基于PCGF亚基的存在被细分为六种主要复合物。在这里,我们报告说,PCGF 5,六个PCGF旁系同源物之一,是一个重要的要求,在分化的小鼠胚胎干细胞(mESCs)向神经细胞的命运。虽然PCGF 5不是mESC自我更新所必需的,但其缺失通过激活SMAD 2/TGF-β信号通路阻断mESC神经分化。PCGF 5功能丧失损害了神经特异性基因周围H2 AK 119 ub 1和H3 K27 me 3的减少,并使它们受到抑制。我们的研究结果表明,PCGF 5可能既是SMAD 2/TGF-β信号通路的抑制剂,又是神经分化的促进剂。总之,我们的研究结果揭示了PCGF 5在指导PRC 1控制细胞命运方面的关键上下文特异性功能。
Polycomb repressive complex 1 (PRC1) is an important regulator of gene expression and development. PRC1 contains the E3 ligases RING1A/B, which monoubiquitinate lysine 119 at histone H2A (H2AK119ub1), and has been sub-classified into six major complexes based on the presence of a PCGF subunit. Here, we report that PCGF5, one of six PCGF paralogs, is an important requirement in the differentiation of mouse embryonic stem cells (mESCs) towards a neural cell fate. Although PCGF5 is not required for mESC self-renewal, its loss blocks mESC neural differentiation by activating the SMAD2/TGF-β signaling pathway. PCGF5 loss-of-function impairs the reduction of H2AK119ub1 and H3K27me3 around neural specific genes and keeps them repressed. Our results suggest that PCGF5 might function as both a repressor for SMAD2/TGF-β signaling pathway and a facilitator for neural differentiation. Together, our findings reveal a critical context-specific function for PCGF5 in directing PRC1 to control cell fate.
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