RNA G四重复体抑制了 Mycobacterium tuberculosis 中的 PE/PPE 转录的翻译
Ashish Kumar1, Vinay Kamuju2, Perumal Vivekanandan1
1Kusuma School of Biological Sciences, Indian Institute of Technology, New Delhi, India.
The Journal of biological chemistry
|December 16, 2023
概括
在Mycobacterium结核病转录中,特别是PE/PPE基因中,RNA G-四重复合体 (rG4s) 非常丰富. 稳定这些rG4s可抑制细菌生长和基因表达,这表明它们是潜在的药物标.
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:
- 越来越多的人认识到RNA G-四重复体 (rG4s) 在基因调节中的作用.
- 它们在细菌中的功能,特别是在压力下,尚不清楚.
- 众所周知可以在恶劣条件下生存的菌根菌,为研究rG4s.提供了一个独特的模型.
研究的目的:
- 调查rG4s在致病性菌根细菌中的存在和作用,重点关注Mycobacterium结核病 (Mtb).
- 探索针对Mtb中的rG4s的治疗潜力.
主要方法:
- 生物信息分析以确定Mtb转录中的rG4丰富区域.
- 在体外实验中使用RNA寡核酸来确认G-四倍体的形成和稳定与BRACO19.
- 测试测量BRACO19对PE/PPE基因转录,Mtb生长和蛋白质翻译的影响.
- 使用THP-1细胞的感染模型来评估rG4稳定对宿主炎症反应的影响.
主要成果:
- rG4丰富是缓慢生长的病原菌菌的独特特征.
- Mtb转录包含许多折叠的rG4s,其中超过50%位于独特的PE/PPE基因家族.
- rG4配体BRACO19稳定这些结构,抑制PE/PPE基因转录和翻译,并选择性地抑制Mtb的生长.
- 由于rG4稳定,PE/PPE蛋白水平降低会减弱受感染细胞的炎症反应.
结论:
- RNA G四重复基因在Mtb的PE/PPE基因的转录后翻译控制中发挥着至关重要的作用.
- 在真菌细菌转录中的rG4s代表了结核病治疗的有希望的新药标.
- 针对rG4s提供了一种潜在的策略,通过破坏基本基因调节来对抗Mtb感染.
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