殖民地模式的多稳定性来自于可视化的开关
Pan Chu1,2, Jingwen Zhu1, Zhixin Ma1,2
1State Key Laboratory for Quantitative Synthetic Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
概括
细菌殖民地模式表现出多种稳定性,由于合成双稳定开关,形成不同的类型,如环或部门. 最初的细胞条件和基因网络在扩张过程中驱动模式的出现.
科学领域:
- 微生物学 微生物学
- 系统生物学 系统生物学
- 生物物理学的生物物理.
背景情况:
- 微生物殖民地发展是由机械,生化和环境因素之间的复杂相互作用形成的.
- 基因调节网络在殖民地形成期间控制空间模式方面发挥着至关重要的作用.
- 了解模式形成需要创新的方法来分析复杂的生物系统.
研究的目的:
- 为了研究细菌殖民地模式的多稳定性.
- 阐明驱动环状和板块状图案形成的机制.
- 探索基因调节网络和微环境线索在模式确定性和噪音诱导的对称性破坏中的作用.
主要方法:
- 利用定量成像技术来分析殖民地形态.
- 采用空间解析的转录组分析来理解基因表达模式.
- 开发了一种合成双稳定开关来控制模式形成.
主要成果:
- 在细菌殖民地模式中表现出多稳定性,观察到明显的环状和板块状形成.
- 鉴定了基因调节网络中的分支事件,作为单细胞决定性环形模式形成的关键驱动因素.
- 在范围扩展期间观察到噪音诱导的对称性破坏,由创始人效应放大,并受到初始细胞条件的影响.
结论:
- 细菌殖民地模式形成表现出多稳定性,由合成双稳定开关控制.
- 确定性 (基因网络,环境) 和随机性 (创始效应,初始条件) 过程都对新兴的自我组织行为作出贡献.
- 范围扩展使单个细胞能够产生复杂的模式,即使在均的环境中.
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