之间的相互作用会影响由VI型分泌系统驱动的细菌竞争的结果
Simon B Otto1, Richard Servajean2, Alexandre Lemopoulos1
1Laboratory of Molecular Microbiology, Global Health Institute, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland.
Current biology : CB
|May 15, 2024
概括
在Vibrio cholerae中,VI型分泌系统 (T6SS) 使用IV型 pili (T4Ps) 向并杀死非亲属细菌. 皮利多样性影响竞争,聚合保护亲属免受T6SS攻击.
科学领域:
- 微生物学 微生物学
- 细菌相互作用 细菌相互作用
- 分子生物学分子生物学
背景情况:
- 细菌的VI型分泌系统 (T6SS) 是细菌用来与其他细胞相互作用的依赖接触的武器.
- 细胞与细胞之间的接触对于T6SS功能至关重要,通常由像IV型 pili (T4Ps) 这样的表面结构介导.
- 众所周知,在Vibrio cholerae中,T4Ps在质表面上的相互作用中介,但它们在液体培养中T6SS中介杀死中的作用尚不清楚.
研究的目的:
- 调查T4Ps是否在液态生长条件下调解T6SS依赖的杀死非亲属Vibrio cholerae.
- 确定T4Ps的多样性如何影响细胞间接触和随后的T6SS介导的竞争.
- 确定影响T6SS针对竞争对手的因素,并探索自动聚合在T6SS防御中的作用.
主要方法:
- 在液体生长条件下对Vibrio cholerae相互作用的实验观测.
- 与T4Ps的存在和多样性相关的T6SS中介杀戮的分析.
- 开发一个基于物理的计算模型来模拟自聚动态.
主要成果:
- 通过Pilus介导的相互作用使得配备T6SS的Vibrio cholerae能够在液体培养中杀死非亲属细胞.
- 在T4Ps中自然存在的多样性会影响细胞间接触的频率和T6SS介导的竞争程度.
- 计算模型揭示了影响T6SS针对 pili 携带竞争对手的因素.
结论:
- 类型IV pili促进T6SS介导的非亲属Vibrio cholerae的杀死,从而造成了选择性的负担.
- 皮卢斯的多样性在V. cholerae参与T6SS介导竞争的能力方面发挥着关键作用.
- 由T4P多样性驱动的自动聚合和空间分离,提供了对T6SS攻击的保护.
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