3'UTR衍生的小RNA配对对在巨细胞内对沙门氏菌代谢重编程的抗酸性
Takeshi Kanda1,2, Fang Liu3,4, Hoda Kooshapour5,6
1Department of Infection Biology, Institute of Medicine, University of Tsukuba, 305-8575Ibaraki, Japan.
Nucleic acids research
|December 29, 2025
概括
沙门氏菌使用AdiA蛋白来抵抗酸性. 从adiA mRNA中衍生出的小RNA,AdiZ,调节新陈代谢,并增强宿主巨细胞中的细菌生存.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 细菌病原体的产生
背景情况:
- 肠道细菌需要耐酸性才能在感染期间在宿主酸性环境中生存.
- 沙门氏菌是一种可选的细胞内病原体,利用阿尔金因脱碳酶 (AdiA) 系统对抗酸性.
- 阿迪亚mRNA的3'-未翻译区域 (UTR) 是调节性小RNA的来源.
研究的目的:
- 为了研究来自adiA mRNA的小RNA AdiZ的功能.
- 了解AdiZ如何促进沙门氏菌病原和宿主中的生存.
- 阐明AdiZ在细菌新陈代谢中的调节作用.
主要方法:
- 通过RNA-RNA互动原子分析来识别AdiZ标.
- 转录组分析以评估基因表达变化.
- 在体外结构探测和体内验证验证以确认RNA-RNA相互作用.
主要成果:
- 在adiA mRNA 3'-UTR被RNase E.加工成一个调节性小RNA,AdiZ.
- AdiZ直接与参与葡萄糖吸收 (ptsG),糖分解 (pykF) 和无氧呼吸 (dmsA) 的mRNA结合并进行负调节.
- AdiZ在巨细胞中被诱导,在酸性和缺氧条件下促进沙门氏菌的生存.
结论:
- 同时表达AdiA和AdiZ将氨酸依赖的酸性耐药性与沙门氏菌的代谢重编程联系起来.
- AdiZ在宿主细胞内的沙门氏菌适应和生存中发挥着关键作用.
- 这项研究揭示了一种新的调节机制,协调细菌病原体的抗压力和代谢适应.
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