人类BAF染色体重塑器处理由先驱转录因子OCT4-SOX2结合的核细胞
Joscha Weiss1, Luca Vecchia2, David Domjan3
1Institute for Cancer Research (ISREC), Swiss Federal Institute of Technology Lausanne (EPFL), Station 19, CH-1015 Lausanne, Switzerland; Friedrich Miescher Institute for Biomedical Research, Fabrikstrasse 24, 4058 Basel, Switzerland; University of Basel, Petersplatz 10, 4001 Basel, Switzerland.
Molecular cell
|February 12, 2026
概括
像OCT4-SOX2这样的先驱转录因子 (TF) 与核细胞体上的BAF复合体相互作用. BAF复合体使用两个方向,影响TF结合,并可能改变染色质重塑方向.
科学领域:
- 分子生物学分子生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 染色体动力学 染色体动力学
背景情况:
- 染色体重塑复合体通过改变核细胞的可访问性,对基因调节至关重要.
- 像OCT4-SOX2这样的先驱转录因子 (TF) 可以与凝聚的染色质结合,从而启动基因激活.
- 人类的BRG1/BRM相关因子 (BAF) 综合体是关键的ATP依赖性染色体重塑剂.
研究的目的:
- 研究先驱TF (OCT4-SOX2) 与核细胞上BAF复合物的相互作用的结构机制.
- 阐明BAF复合体是如何处理TF结合核体,并影响重塑结果的.
主要方法:
- 组合和单分子生物化学试验.
- 电子显微镜 (cryo-EM) 用于结构的确定.
- 核细胞重塑试验.核细胞重塑试验.
主要成果:
- 在BAF复合体中,OCT4-SOX2结合的核细胞在两个不同的方向上进行接触:进入点和退出点.
- 在ENTRY现场,最初的共存之后是潜在的TF碰撞,导致重塑方向逆转或TF解离.
- 在EXIT部位,BAF经历了构造变化,核细胞的亚群转移离开TF结合部位.
- 单分子研究揭示了频繁的重塑方向变化,确定了ADP-bound conformation作为潜在的中间体.
结论:
- BAF复杂的TF结合核细胞的处理涉及动态形状变化和可变的重塑结果.
- 了解这些相互作用是解读先驱因子和染色体重塑剂对基因转录的调节的关键.
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