活动组装的nBAF复合物通过调节RNA聚合酶II生产性延长来调节快速即时早期基因转录
Karen G Cornejo1, Andie Venegas1, Morgan H Sono1
1Molecular and Cell Biology Department, School of Natural Sciences, University of California, Merced, 5200 North Lake Road, Merced, CA 95343, USA.
Cell reports
|October 16, 2024
概括
神经元SWI/SNF复合体 (nBAF) 通过促进RNA聚合酶II (RNA Pol II) 延长,对活动诱导的基因转录至关重要. 它克服了核体障碍,使神经元中早期基因的生产转录成为可能.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 基因规则 基因规则
背景情况:
- 信号依赖性RNA聚合酶II (RNA Pol II) 的生产延长对于基因转录至关重要,特别是神经元中直接早期基因 (IEGs).
- 在活动诱导的转录过程中,延长RNA Pol II在核细胞障碍中导航的机制在很大程度上是未知的.
研究的目的:
- 研究哺乳动物交换机/非发酵糖 (SWI/SNF) 复合体在神经活动诱导的转录中的作用.
- 阐明神经元SWI/SNF复合体 (nBAF) 促进RNA Pol II延长的机制.
主要方法:
- RNA干扰 (RNAi) 是一种RNA干扰.
- 使用降解剂和小分子抑制剂.
- 对神经元直接早期基因 (IEG) 转录的分析,包括Arc.
主要成果:
- 神经元SWI/SNF复合体 (nBAF) 对于活动诱导的神经元IEGs的转录至关重要.
- nBAF促进RNA Pol II在促进器处暂停,并依赖于RNA Pol II的信号进行招募 (加载).
- 在基因体内,nBAF通过与延伸复合体和延伸竞争性RNA Pol II.的相互作用来调解生产性RNA Pol II延伸.
- 活动诱导的nBAF组合,特别是ARID1A招募,及其ATPase活性对于RNA Pol II延长至关重要.
结论:
- 该nBAF复合体在调节RNA Pol II转录方面发挥着多方面的作用,包括促进者-近位事件和基因体延长.
- 这项研究揭示了由nBAF复合体介导的活性诱导的RNA Pol II延长的新型机制.
- 这些发现为与BAF复杂成分突变相关的人类疾病提供了潜在的见解.
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