鸟类致病性大肠杆菌的效应蛋白Hcp1通过与PHB2相互作用,导致线粒体功能障碍
Xiyang Wei1, Zhao Qi1, Xiaoru Wang1
1Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, College of Veterinary Medicine, Anhui Agricultural University, Hefei 230036, PR China; Anhui Province Engineering Laboratory for Animal Food Quality and Bio-safety, College of Veterinary Medicine, Anhui Agricultural University, Hefei 230036, PR China.
Veterinary microbiology
|May 24, 2025
概括
禽类致病性大肠杆菌 (APEC) 血解素联合调节蛋白1 (Hcp1) 破坏宿主细胞线粒体. 这种毒性因子与PHB2相互作用,导致线粒体功能障碍并影响APEC的致病性.
科学领域:
- 微生物学 微生物学
- 细胞生物学 细胞生物学
- 病变的发生和发病.
背景情况:
- 禽类致病性大肠杆菌 (APEC) 使用毒性因子向宿主细胞.
- 第六类分泌系统 (T6SS) 和它的效应因子血清素联合调节蛋白 (Hcp) 对APEC的致病性至关重要.
- 线粒体在宿主-病原体相互作用中发挥着重要作用,但APEC的Hcp1对线粒体功能的影响尚不清楚.
研究的目的:
- 研究Hcp1在APEC病毒性中的作用.
- 为了确定Hcp1对宿主细胞线粒体功能的影响.
- 确定Hcp1诱导线粒体功能障碍的分子机制.
主要方法:
- 在APEC中删除hcp1基因,以评估其对细菌毒性的影响.
- 用HD-11细胞化纯化的Hcp1以分析线粒体参数.
- 测量线粒体膜潜力,Ca2+度,活性氧物种 (ROS) 和ATP水平.
- 液体染色学-双重质谱学 (LC-MS/MS) 用于蛋白质的识别.
- 蛋白质与蛋白质相互作用的研究,包括分子对接和共免疫沉.
主要成果:
- 删除hcp1显著影响APEC的生物特征和毒性.
- 对HD-11细胞的Hcp1暴露导致线粒体膜潜能降低,线粒体Ca2+和ROS水平增加,ATP产生减少.
- 在LC-MS/MS中,Prohibitin 2 (PHB2) 被确定为一种潜在的Hcp1相互作用蛋白.
- 分子对接和共免疫沉证实了Hcp1和PHB2.2之间的相互作用.
结论:
- Hcp1是APEC的一个关键毒性因子.
- Hcp1通过准线粒体参数,诱导宿主细胞中的线粒体功能障碍.
- Hcp1与PHB2相互作用,这表明Hcp1介导的线粒体功能障碍和APEC致病性的机制.
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