在Vibrio parahaemolyticus中,ArcB调节了定数感应系统,以调节1型III分泌系统
Ce Zhang1,2, Min Liu1,2, Ying Wu1,2
1Jiangsu Province Engineering Research Center for Marine Bio-resources Sustainable Utilization, Hohai University, Nanjing, China.
Gut microbes
|November 20, 2023
概括
病毒的病毒性依赖于一种新的"定数感知途径" (quorum sensing pathway). ArcB和LuxQ通过LuxO调节III型分泌系统1 (T3SS1) 的表达,影响细胞毒性.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 细菌病原体的产生
背景情况:
- 质量感应通过光转介电路调节许多Vibrio物种的毒性.
- 第三类分泌系统1 (T3SS1) 对Vibrio parahaemolyticus细胞毒性至关重要.
- 在V. parahaemolyticus中,T3SS1的确切的定数感应调节仍然不清楚.
研究的目的:
- 为了阐明控制Vibrio parahaemolyticus中的T3SS1表达的定数感知调节机制.
- 确定这条监管途径所涉及的关键组成部分.
主要方法:
- 研究了LuxQ,ArcB和LuxO之间的蛋白质相互作用.
- 在不同的氧气条件下分析了ArcB和LuxO的酸化状态.
- 评估了ArcB,LuxQ和LuxO在T3SS1基因表达中的作用.
主要成果:
- 确定了ArcB和LuxQ作为T3SS1表达的关键调节者,通过LuxO行动.
- 证明在高氧条件下,LuxQ可化ArcB,后者可化LuxO,激活T3SS1.1.
- 表明在低氧条件下,ArcB自化和化ArcA,但ArcA不参与T3SS1调节.
结论:
- 在V. parahaemolyticus中发现了一种涉及ArcB,LuxQ和LuxO的替代定数感应光继电通路,用于T3SS1调节.
- 这一发现揭示了对V. parahaemolyticus的基因表达和毒性进行环境调节的新层.
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