质量检测LuxR蛋白VjbR和BabR共同调节感染期间的Brucella abortus生存率
Mitchell T Caudill1, S Tristan Stoyanof1, Clayton C Caswell1
1Center for One Health Research, Department of Biomedical Sciences and Pathobiology, Virginia Tech, VA-MD College of Veterinary Medicine, Blacksburg, Virginia, USA.
Journal of bacteriology
|February 27, 2025
概括
布鲁塞拉流产的生存依赖于涉及VjbR和BabR蛋白质的定数感应系统. 删除这两种蛋白质揭示了协同相互作用和广泛的遗传失调,影响了毒性因子控制.
科学领域:
- 微生物学 微生物学
- 细菌病原体的产生
- 检验委员会检测检验委员会检测.
背景情况:
- 布鲁塞拉堕胎使用一个N-乙同类素乳 (AHL) 定量检测系统来检测毒性.
- 这个系统涉及两个LuxR蛋白,VjbR和BabR,并调节了感染期间细菌生存的关键因素.
研究的目的:
- 调查VjbR和BabR在布鲁塞拉流产病毒性中的作用.
- 描述这些定数感应蛋白之间的相互作用及其对细菌生存和基因表达的影响.
主要方法:
- 产生一个缺乏VjbR和BabR (∆vjbR∆babR) 的布鲁塞拉堕胎菌株.
- 在各种条件下 (载体,AHL) 进行单一和双重删除菌株的转录组分析.
- 在慢性感染小鼠模型中评估细菌存活率 (C57BL/6).
主要成果:
- 双删除菌株在慢性感染模型中对存活率表现出协同效应.
- 转录组分析显示,在删除菌株中存在广泛的遗传失调,在双重突变体中具有有限的AHL反应.
- 据发现,定数传感调节了脱路径,尽管没有观察到氧化应激或无氧增长的显著差异.
- BabR表现出自我调节,并且发现VjbR可以轻微抑制BabR的表达.
结论:
- VjbR和BabR蛋白质在布鲁塞拉流产生存和毒性方面发挥着协调作用.
- 布鲁塞拉定数感应系统在生理上是活跃的,因此需要进一步研究VjbR和BabR的联合相互作用.
- 定数感应影响细菌的适应,包括脱路径.
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