以效应器为媒介的转录重新连接通过保留c-di-GMP对抗性来解决细菌间的冲突
Fugui Xu1, Zeyu Zhang1, Fengzhi Yuan2
1State Key Laboratory of Agricultural and Forestry Biosecurity, College of Plant Protection, Nanjing Agricultural University, Nanjing 210095, China.
Current biology : CB
|January 13, 2026
概括
细菌可以劫持竞争对手的蛋白质,以赢得冲突. 伪omonas保护体使用Lysobacter enzymogenes LtaE效应器来重新编程其信号,激活运动性并促进生存.
科学领域:
- 微生物学 微生物学
- 细菌的竞争 细菌的竞争
- 进化生物学是进化的生物学.
背景情况:
- 微生物竞争推动了细菌进攻和防御策略的演变.
- 细菌使用分泌系统来输送效应剂,但是劫持竞争对手的效应剂是不太了解的.
研究的目的:
- 研究细菌是否可以利用来自竞争对手的效应蛋白来解决物种间冲突.
- 为了阐明Pseudomonas保护菌从Lysobacter enzymogenes中劫持LtaE效应物的机制.
主要方法:
- 在Pseudomonas protegens.中研究了跨物种冲突解决.
- 通过IV型分泌系统 (T4SS) 分析了LtaE效应器的劫持.
- 使用生物化学分析来研究LtaE-FleQ相互作用和c-di-GMP结合抑制.
主要成果:
- P.protegens劫持LtaE以中和毒素并重新编程信号.
- LtaE与鞭毛主调节器FleQ结合,保护其免受抑制c-di-GMP的影响.
- 这种相互作用覆盖了静止信号,激活了鞭毛基因表达和逃脱运动性.
- LtaE广泛针对FleQ同类,将竞争对手的检测与运动性联系起来.
结论:
- 建立了一个新的细菌冲突解决模式,涉及到效应器劫持.
- 证明了非细胞毒性作用因子如何作为重编程转录网络的分子开关.
- 强调了效应器劫持在增强细菌表型可塑性和生存方面的作用.
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