一个节奏基因表达的调度器
Dimos Gaidatzis1,2, Maike Graf-Landua1,3, Stephen P Methot1
1Friedrich Miescher Institute for Biomedical Research (FMI), Basel, Switzerland.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
遗传振荡器精确时间基因表达. 这项研究揭示了转录因子结合如何安排C. elegans中的数千个基因,为发育生物学提供了一个框架.
科学领域:
- 发展生物学 发展生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 遗传振荡器对于在发育和生理学过程中精确的基因表达时间至关重要.
- C. elegans 变时钟可以作为一个模型系统来理解振荡器如何调节基因表达.
- 了解定时基因表达的调节机制对于各种生物过程至关重要.
研究的目的:
- 为了研究基因振荡器如何安排成千上万个基因的表达.
- 确定控制节律性基因表达的关键调节者和机制.
- 开发染色体和基因表达动态的预测模型.
主要方法:
- 单细胞RNA测序用于分析基因表达模式.
- 时间解析的ATAC-seq用于映射染色体可访问性动态.
- 开发一个整合转录因子结合数据的线性模型.
- 扰动实验 (GRH-1/Grainyhead) 用于验证模型预测.
主要成果:
- 在个体组织中观察到广泛的峰值相分散.
- 在成千上万的调节元素中,染色质可访问性的节奏变化.
- 确定了九个关键的转录因子,调节了峰值阶段和振幅.
- 证明这些因素可以通过破坏性干扰产生非节律活动.
- 在GRH-1扰动时精确预测基因表达和染色质动态.
结论:
- 组合性,非合作性转录因子结合提供了一个安排复杂基因表达模式的框架.
- 确定的监管原则适用于超出发展的动态生物过程.
- 这项研究提供了对转录因子对基因表达的定量控制的见解.
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