VapC36介导的内在应激适应是铜耐受性和Mycobacterium结核病的致病性所必需的
Arun Sharma1, Gopinath Chattopadhyay2, Manisha Singh1
1BRIC-Translational Health Science and Technology Institute, Faridabad-Gurugram expressway, Faridabad, Haryana, India.
Science advances
|February 11, 2026
概括
在Mycobacterium tuberculosis中,VapBC36毒素-抗毒素系统调节了铜的敏感性和毒性. 删除VapBC36成分增加了M.结核病对铜的敏感性,影响动物模型中的疾病进展.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 结核病研究 结核病研究
背景情况:
- 毒素-抗毒素 (TA) 系统对于细菌的生存和毒性至关重要.
- 在Mycobacterium结核病理学中VapBC36 TA系统的作用仍然在很大程度上未被描述.
研究的目的:
- 为了研究VapBC36 TA系统在Mycobacterium结核病中的功能.
- 确定VapBC36对M.结核病毒性和铜敏感性的影响.
主要方法:
- 对VapBC36相互作用和活性进行全系统分析.
- 在体外核糖核酶测定和铜结合研究.
- 在体内研究使用小鼠和试验猪模型的M.结核病感染.
主要成果:
- VapC36降解serX,并与相关的和非相关的抗毒素相互作用.
- 铜结合增强了VapC36核糖核酶的活性.
- 删除突变 (ΔC36, ΔBC36) 在体外和体内 (食铜的小鼠) 显示对铜的敏感性增加.
- 在几内亚猪中,ΔBC36表现出减弱的生长,但在小鼠中却没有.
结论:
- VapBC36在M.肺结核病理生理学中起着重要作用,特别是在调节铜恒温和毒性方面.
- 在不同的宿主模型中,VapBC36系统对M.结核病感染的贡献有所不同.
- 这些发现有助于更好地理解TA系统调节及其对菌根细菌病原发生的贡献.
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