温室菌体进化以整合宿主压力和定量信号在溶解-溶解生成决策中
John B Bruce1,2, Robyn Manley1, Elvina Smith1
1Environment and Sustainability Institute, University of Exeter, Penryn Campus, Exeter, United Kingdom.
PLoS biology
|January 6, 2026
概括
温的菌体通过宿主压力 (SOS) 和信号 (arbitrium) 来适应溶解/溶解性决定. 这种双重信号允许在不断变化的环境中灵活地制定生命史策略,优化感染动态.
科学领域:
- 微生物学 微生物学
- 进化生物学 进化生物学
- 流行病学 流行病学
背景情况:
- 温室菌体表现出化和 lysogenic 循环,调节基于环境线索的决定.
- 主体SOS应激反应和菌体产生的任意信号影响温和的菌体溶解/溶解决定.
- 在SOS和任意信号之间的潜在冲突需要了解菌体集成策略.
研究的目的:
- 通过使用进化流行病学理论,探索菌体如何进化,以整合SOS和任意信号,以做出溶解/溶解生成决策.
- 调查响应来自主机条件和外部主机可用性的补充信息的适应性价值.
- 通过实验验证使用phi3T菌体和Bacillus subtilis的理论预测.
主要方法:
- 进化流行病学理论应用于模拟菌体决策.
- 在感染Bacillus subtilis的phi3T菌体中对 lysis-lysogeny决策的实验研究.
- 分析菌体对不同宿主压力水平和任意度的反应行为.
主要成果:
- 预计SOS和任意信号的菌体集成是适应性的,提供互补的环境信息.
- 实验结果显示,溶解-溶解生成决定取决于集成宿主条件和任意信号数据.
- 当易受宿主稀缺时,自由菌体更有可能溶解压力宿主;在类似的条件下,菌体不太可能退出压力宿主.
结论:
- 菌体进化了塑性生命史策略,通过整合宿主内部 (压力) 和外部 (宿主可用性) 线索来优化感染动态.
- 这项研究为理解由多个环境信号驱动的病毒可塑性提供了理论框架.
- 双信号系统允许温和菌体在波动的环境中适应性调节其感染策略.
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