循环-di-GMP通过出口ATPaseHrcN控制Pseudomonas注射器感染的III型效应体出口和症状的发展
Danny Ward1, Richard H Little1, Catriona M A Thompson1
1John Innes Centre, Norwich Research Park, Norwich, United Kingdom.
PLoS pathogens
|December 26, 2025
概括
伪omonas注射器的细菌感染依赖于3型注射体 (T3I) 效应器. 对HrcN的循环-di-GMP结合调节了T3I效应因子的传递,影响了植物疾病的发展.
科学领域:
- 植物病理学 植物病理学
- 细菌学 细菌学是一门学科.
- 分子生物学分子生物学
背景情况:
- 伪虫使用3型注射体 (T3I) 来分泌效应物到植物中,引起疾病.
- 效应体分泌受HrcN的调节,HrcN是一种ATPase,对T3I功能和细菌毒性至关重要.
- HrcN结合循环-di-GMP,但其在T3I调节和毒性中的作用尚不清楚.
研究的目的:
- 研究循环-di-GMP与HrcN结合对P. syringae植物感染的影响.
- 确定HrcN-cyclic-di-GMP相互作用如何影响T3I-effector分泌和转位.
- 阐明HrcN在控制细菌毒性和疾病症状中的作用.
主要方法:
- 预测的循环-di-GMP-HrcN结合部位的部位导向突变发生.
- 使用Arabidopsis thaliana和P. syringae突变的感染测定.
- 对T3I效应因子转移和细菌繁殖的分析.
主要成果:
- 突变HrcN结合部位并没有阻碍Arabidopsis叶中的细菌增殖.
- 突变者表现出明显减少的疾病症状,表明病毒性受损.
- 包括HopAA1-2在内的特定T3I效应因子的转位在HrcN突变中减少.
结论:
- 对HrcN的循环-di-GMP结合对于有效的T3I-effector转位和P. syringae的疾病发展至关重要.
- 这种结合代表了一种潜在的新型监管机制,可以控制效应因子分泌.
- 针对HrcN-cyclic-di-GMP相互作用可以提供控制细菌植物疾病的策略.
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