用增长合模型解决基因电路中出现的短暂振荡
Hari R Namboothiri1, Ayush Pandey2, Chelsea Y Hu1
1Department of Chemical Engineering, Texas A&M University, College Station, TX 77843, USA.
Science advances
|February 6, 2026
概括
合成基因电路由于细胞状态的变化而表现出意想不到的行为. 一个新的双尺度模型,基因表达跨增长阶段 (GEAGS),通过将基因表达与人口增长相结合,准确地预测了这些动态.
科学领域:
- 合成生物学 合成生物学
- 计算生物学 计算生物学
- 生物物理学的生物物理.
背景情况:
- 合成基因电路在批次培养中经常表现出不可预测的动态.
- 传统模型通常不考虑在生长过程中细胞生理状态的变化.
研究的目的:
- 开发一个多尺度建模框架,准确预测合成基因电路在不同增长阶段的行为.
- 解决标准模型和在降解标记蛋白报告器中观察到的短暂振荡表达之间的差异.
主要方法:
- 开发了跨增长阶段的基因表达 (GEAGS),一个双尺度建模框架.
- 结合细胞内基因表达与使用化学反应网络的物流人口增长.
- 嵌入增长阶段依赖的速度修改函数.
主要成果:
- GEAGS准确地复制了观察到的短暂的振荡表达模式.
- 确定了氨基酸循环和生长阶段过渡作为振荡的关键驱动因素.
- 通过将其应用于分层反电路来证明模型的适应性,解决预测不匹配.
结论:
- GEAGS提供了一个可通用的平台,用于预测合成基因电路中出现的行为.
- 强调多尺度建模对于在动态环境中强大的合成电路设计至关重要.
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