突发基因表达的细胞周期依赖性:从适应机械模型到单细胞RNA-seq数据的洞察力
Augustinas Sukys1,2,3, Ramon Grima1
1School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3JH, United Kingdom.
Nucleic acids research
|April 16, 2025
概括
细胞中的基因表达表现出爆裂的模式. 这项研究表明,在DNA复制后,突发频率减半,而突发大小保持稳定,突显了转录的细胞周期调节.
科学领域:
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
- 系统生物学 系统生物学
背景情况:
- 基因表达通常是爆发性的,其特点是爆发频率和爆发大小.
- 这些突破参数的细胞周期依赖性在转录组水平上还不清楚.
研究的目的:
- 为了描述基因表达的细胞周期依赖性,跨转录组的突发参数 (频率和大小).
- 为了研究DNA复制如何影响转录调节.
主要方法:
- 在G1和G2/M细胞周期阶段,对成千上万个小鼠基因的估计每基因突发参数 (频率,大小).
- 使用了适合单细胞RNA测序数据的机械模型.
- 采用深度学习用于细胞周期位置推断.
主要成果:
- 在DNA复制后,突发频率中位数大约减少了一半 (G2/M与G1),而突发大小基本保持不变.
- 突发参数比率的全基因组广泛分布表明了转录调节的显著异质性.
- 观察到爆破频率和尺寸比率之间的负相关性,表明合调节.
结论:
- 转录调节表现出显著的细胞周期依赖性,特别是影响突发频率后复制.
- 准确的建模需要考虑基因拷贝数的变化和细胞周期合的外部噪声.
- 爆破参数没有独立调节,这意味着协调的控制机制.
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