开拓性活动区分了激活和非激活的SOX2结合位点
Michela Maresca1, Teun van den Brand1, Hangpeng Li2
1Division of Gene Regulation, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
The EMBO journal
|September 11, 2023
概括
像SOX2这样的先驱转录因子迅速保持色素的开放. 只有SOX2维护的可访问部位,而不是所有结合部位,直接预测基因表达,揭示了关键的调节作用.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 转录因子 (TFs) 通过与特定的DNA位点结合来调节全基因组的活动.
- 先进的TFs,如SOX2,对于建立和维持可访问的染色质至关重要,使其他TFs能够结合.
- 确定直接驱动基因转录的特定TF结合部位仍然是一个重大挑战.
研究的目的:
- 为了研究先驱转录因子SOX2在维持染色质可访问性的作用.
- 为了确定SOX2-保持开放的染色体位点和活跃的基因转录之间的关系.
- 使用基因组编辑功能验证与SOX2相关的监管元素.
主要方法:
- SOX2的急性蛋白质耗尽,以评估其对染色质可访问性的影响.
- 新生转录分析以将染色质状态与基因表达联系起来.
- 通过CRISPR-Cas9基因组编辑,在Klf2位置功能测试预测的调节元素.
主要成果:
- 在SOX2耗尽后一小时内,成千上万的可访问的染色蛋白位失去了,这表明了快速的周转.
- 由SOX2维护的开放色素位点对基因表达的高度预测.
- 其他与维持可访问性无关的SOX2结合位点,与基因表达有有限的相关性.
结论:
- SOX2的调节功能主要是在它积极维持染色质可访问性的部位发挥的.
- 不保持染色质可访问性的SOX2结合位点在很大程度上是基因调节的必不可少的.
- 这项研究强调了先驱因子在通过染色体调节来指导转录活动中的关键作用.
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