铜感应转录因子ArsR2调节VjbR以维持Brucella abortus中的毒性
Feijie Zhi1,2,3, Kemeng Liu1,2,3, Hao Geng1,2,3
1State Key Laboratory for Animal Disease Control and Prevention, College of Veterinary Medicine, Lanzhou Veterinary Research Institute, Lanzhou University, Chinese Academy of Agricultural Sciences, Lanzhou, People's Republic of China.
Emerging microbes & infections
|September 19, 2024
概括
布鲁塞拉ArsR2蛋白对铜的稳态和B. abortus中的毒性至关重要. 删除ArsR2可以减少布鲁塞拉.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 动物病是一种由brucella引起的动物性疾病,导致动物的生殖问题和人类的慢性疾病.
- ArsR家族的转录调节器参与了各种细胞功能,但它们在布鲁塞拉菌中的作用尚不清楚.
- 维尔B型IV分泌系统 (T4SS) 对于布鲁塞拉病毒的毒性至关重要.
研究的目的:
- 调查布鲁塞拉菌中ArsR家族成员的功能,特别是B. abortus中的ArsR2.
- 阐明ArsR2在铜恒温和毒性基因调节中的作用.
- 了解涉及ArsR2,VjbR和T4SS的监管网络.
主要方法:
- 在B. abortus. 中对ArsR2的鉴定和表征.
- 使用转录组学进行基因表达分析.
- 研究ArsR2与VjbR的相互作用及其在T4SS调节中的作用.
- 在小鼠模型中进行病毒性测试.
主要成果:
- ArsR2被确定为一个非经典的ArsR成员,调节241个基因,包括VirB T4SS的基因.
- 在B. abortus中,ArsR2对于铜恒温是必不可少的.
- ArsR2直接针对VjbR,一个LuxR类型的转录调节器,以控制T4SS的生产.
- 铜调节ArsR2活动,但不调节VjbR活动.
- 在小鼠模型中,arsR2的删除显著减弱了毒性.
结论:
- ArsR2是B. abortus中的全球调节剂,对铜的恒温和毒性至关重要.
- ArsR2通过调节VjbR来控制T4SS表达,而铜则影响了这一过程.
- 这些发现提供了关于Brucella物种中ArsR介导的毒性调节的见解.
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