在Vibrio parahaemolyticus中,III型分泌系统2的表达调节是由触媒激活蛋白的触媒激活蛋白
Tomotaka Tanabe1, Mitsuki Tsukamoto1, Mahiro Shioda1
1Laboratory of Hygienic Chemistry, College of Pharmaceutical Sciences, Matsuyama University, Matsuyama, Ehime 790-8578, Japan.
FEMS microbiology letters
|July 25, 2024
概括
催化剂激活蛋白 (CAP) 通过调节T3SS2基因表达,特别是vpa1348.8.,增强Vibrio parahaemolyticus的毒性. 这种转录因子在细菌的致病机制中起着关键作用.
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:
- 维亚血解菌具有两种III型分泌系统 (T3SS1和T3SS2),这对其致病性至关重要.
- 细菌经常在肠道中遇到碳限制条件,影响毒性因子表达.
- 催化剂激活蛋白 (CAP) 是已知的碳代谢调节者,也是阴性细菌中毒性的调节者.
研究的目的:
- 研究catabolite激活蛋白 (CAP) 在Vibrio parahaemolyticus中调节T3SS1和T3SS2的表达中的作用.
主要方法:
- 基于乳酸脱酶的细胞毒性测试,以评估T3SS依赖的细胞毒性.
- 逆转录定量PCR (RT-qPCR) 用于分析基因表达水平.
- 电泳流动性转移测定 (EMSA) 和DNase I足迹测定,以确定CAP对促进地区具有约束力.
- 贝塔-银酸酶记者测定量化通过CAP调节的基因表达.
主要成果:
- 与T3SS1.1相比,CAP对T3SS2介导的细胞毒性有显著的贡献.
- 删除盖基因导致T3SS2相关基因的表达减少,包括vpa1348.8.
- 证明CAP与vpa1348的促进区结合并增强其表达.
结论:
- 在Vibrio parahaemolyticus中,CAP参与调节T3SS2介导的毒性.
- 转录因子CAP在细菌适应碳限制环境方面发挥作用.
- 通过CAP对vpa1348的调控是T3SS2依赖的致病性的一个关键机制.
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