使用Dam-IT的转录因子 (TF) 验证同时捕获全基因组TF-DNA结合,直接基因调节和植物细胞中的染色质可访问性
Will E Hinckley1, Austen Jack1, Aurelia Li1
1Department of Biology, Center for Genomics and Systems Biology, New York University, New York, NY.
bioRxiv : the preprint server for biology
|July 14, 2025
概括
我们开发了DamID-seq 纳入转录组学 (Dam-IT) 来同时测量转录因子DNA结合和基因调节. 据Dam-IT透露,bZIP1结合了可访问的DNA区域来调节基因,支持了"击中运行"模型.
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) 控制基因网络,但TF-DNA结合和基因调节通常被单独研究.
- 实验的局限性产生批量效应,使TF结合和基因表达之间的真正生物学关系的分析变得复杂.
研究的目的:
- 开发一种方法,可以同时测量TF-DNA结合,直接TF-基因调节以及同一细胞批中的染色质可访问性.
- 为了克服在TF监管研究中将生物信号与实验噪声分开的挑战.
主要方法:
- 开发了DamID-seq 纳入转录组学 (Dam-IT),这是一种用于同时分子分析的新技术.
- 采用了一种临时的,基于细胞的TF-target验证系统,可扩展和适应各种实验设计.
- 应用Dam-IT来研究bZIP1转录因子的结合和调节机制.
主要成果:
- 在一个单一的实验中,Dam-IT成功捕获了TF-DNA结合,直接基因调节和染色质可访问性.
- 证明bZIP1通过相对较低的染色质可访问性在DNA区域的结合事件直接调节基因.
- 提供了支持bZIP1.1.通过转录调节的"击中运行"机制的证据.
结论:
- Dam-IT提供了一种强大,综合的方法来研究TF监管网络,解决以前的实验限制.
- 这些发现阐明了bZIP1与DNA相互作用以调节基因表达的特定机制.
- 这项研究促进了我们对基因网络中转录因子动态和调控策略的理解.
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