对B. subtilis的计算建模和动态分析能力基因调节电路具有多个时间延迟和外部噪声调节
Na Zhao1,2, Haihong Liu2,3, Fang Yan2,3
1Department of Mathematics, South China University of Technology, Guangzhou 510641, P. R. China.
Journal of bioinformatics and computational biology
|June 10, 2025
概括
这项研究以延迟微分方程和随机噪声为模型,模拟Bacillus subtilis的能力基因调节. 时间延迟和噪音对于诱导振荡至关重要,为细菌基因调节动态提供了洞察力.
科学领域:
- 生物数学是生物数学.
- 系统生物学 系统生物学
- 微生物遗传学 微生物遗传学
背景情况:
- 细菌表现出自发能力,一种基因交换的状态.
- 了解B. subtilis能力的监管机制对于其应用至关重要.
- 以前的模型往往简化了基因调节电路的复杂动态.
研究的目的:
- 为B. subtilis的能力基因调节开发一个全面的数学模型.
- 调查时间延迟和随机噪声对系统动态的影响.
- 为细菌能力调节提供理论见解.
主要方法:
- 制定了一个六维的连续延迟微分方程 (DDE) 模型.
- 该模型包含了两次延迟以表示监管反循环.
- 引入了一个随机元件来计算环境噪音.
主要成果:
- 时间延迟被确定为B. subtilis竞争回路中振荡行为的关键驱动因素.
- 对多次时间延迟的分析揭示了与单次延迟模型相比,复杂的动态.
- 随机噪声也诱导了振荡,其模式类似于现实世界观测.
- 参数,噪声和时间延迟之间的相互作用显著改变了系统动态.
结论:
- 开发的DDE和随机模型提供了对B. subtilis能力基因调节的更深入的理解.
- 时间延迟和噪音是影响能力电路振荡性质的重要因素.
- 这项研究为未来对细菌基因调节的实验研究提供了宝贵的理论基础.
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