Transcriptional regulation by coactivators in embryonic stem cells.

Transcriptional regulation by coactivators in embryonic stem cells.
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DOI:
10.1016/j.tcb.2012.04.002
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发表时间:
2012-06
影响因子:
19
通讯作者:
Tjian R
Tjian R
中科院分区:
生物学1区
文献类型:
--
作者:
Fong YW;Cattoglio C;Yamaguchi T;Tjian R

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胚胎干细胞,像所有的细胞类型一样,由其独特的转录信号来定义。ES细胞自我更新或退出多能状态并进入分化的能力需要其转录组和表观基因组的广泛变化。值得注意的是,控制每个细胞命运的转录程序必须保持足够的可塑性,以便只有少数转录激活因子的表达可以通过与出人意料的复杂的辅助激活因子集合合作来指定、限制和稳定新的状态,从而覆盖先前存在的状态。在这里,我们讨论我们理解的最新进展,即同一辅激活子如何解释由不同激活子编码的多行信息,并将来自不同调控因子的信号整合到干细胞特异性转录输出中。
Embryonic stem (ES) cells, like all cell types, are defined by their unique transcriptional signatures. The ability of ES cells to self-renew or exit the pluripotent state and enter differentiation requires extensive changes in their transcriptome and epigenome. Remarkably, transcriptional programs governing each cell fate must remain sufficiently malleable so that expression of only a handful of transcriptional activators can override the pre-existing state by collaborating with an unexpectedly elaborate collection of coactivators to specify, restrict and stabilize the new state. Here, we discuss recent advances in our understanding of how the same coactivator can interpret multiple lines of information encoded by different activators and integrate signals from diverse regulators into stem cell-specific transcriptional outputs.
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