CLOCK:BMAL1 is a pioneer-like transcription factor.

CLOCK:BMAL1 is a pioneer-like transcription factor.
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DOI:
10.1101/gad.228536.113
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发表时间:
2014-01-01
影响因子:
10.5
通讯作者:
Rosbash M
Rosbash M
中科院分区:
生物学1区
文献类型:
--
作者:
Menet JS;Pescatore S;Rosbash M

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哺乳动物的生物钟需要主转录因子CLOCK和BMAL 1来驱动节律性基因表达。在此,Menet等人报道了CLOCK:BMAL 1在DNA上的节律性结合促进了染色质的节律性开放。其机制包括CLOCK:BMAL 1与核小体的结合和染色质修饰,如组蛋白变体H2A.Z的掺入。这些数据表明,转录的时钟调节依赖于染色质可及性的节律调节,从而将先锋因子功能的概念扩展到急性基因调控。哺乳动物的生物钟依赖于主基因CLOCK和BMAL 1来驱动节律性基因表达并在昼夜节律控制下调节生物功能。在这里,我们表明,有节奏的时钟:BMAL 1 DNA结合促进有节奏的染色质开放。机制包括CLOCK:BMAL 1与核小体的结合和有节奏的染色质修饰;例如,组蛋白变体H2A.Z的掺入。这种节律性的染色质重塑介导了与CLOCK:BMAL 1相邻的其他转录因子的节律性结合,表明这些其他转录因子的活性有助于全基因组CLOCK:BMAL 1异质性转录输出。因此,这些数据表明,转录的时钟调节依赖于染色质可及性的节奏调节,并建议先锋功能的概念扩展到急性基因调控。
The mammalian circadian clock requires the master transcription factors CLOCK and BMAL1 to drive rhythmic gene expression. Here, Menet et al. report that rhythmic binding of CLOCK:BMAL1 on DNA promotes rhythmic chromatin opening. Mechanisms include CLOCK:BMAL1 binding to nucleosomes and chromatin modifications such as incorporation of histone variant H2A.Z. The data indicate that clock regulation of transcription relies on rhythmic regulation of chromatin accessibility, thus extending the concept of pioneer factor function to acute gene regulation. The mammalian circadian clock relies on the master genes CLOCK and BMAL1 to drive rhythmic gene expression and regulate biological functions under circadian control. Here we show that rhythmic CLOCK:BMAL1 DNA binding promotes rhythmic chromatin opening. Mechanisms include CLOCK:BMAL1 binding to nucleosomes and rhythmic chromatin modification; e.g., incorporation of the histone variant H2A.Z. This rhythmic chromatin remodeling mediates the rhythmic binding of other transcription factors adjacent to CLOCK:BMAL1, suggesting that the activity of these other transcription factors contributes to the genome-wide CLOCK:BMAL1 heterogeneous transcriptional output. These data therefore indicate that the clock regulation of transcription relies on the rhythmic regulation of chromatin accessibility and suggest that the concept of pioneer function extends to acute gene regulation.
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