在植物病原体的病毒性诱导条件下,Hfq调解了转录组范围的RNA结构组重编程
Canfeng Hua1, Jiadai Huang1, Yue Sun1
1Department of Biomedical Sciences, City University of Hong Kong, Hong Kong, China.
Cell reports
|July 25, 2024
概括
细菌mRNA结构在缺乏营养的条件下发生变化,影响Pseudomonas syringae中的基因表达和毒性. 这种RNA调节涉及Hfq,RpoS和CysB,突出显示了细菌中的保存机制.
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:
- 使者RNA (mRNA) 结构对于基因表达调节至关重要.
- 在植物细菌病原体中mRNA折叠的特定作用尚不清楚.
- 了解这些机制可以揭示控制细菌感染的新目标.
研究的目的:
- 研究营养条件对Pseudomonas syringae的mRNA结构的影响.
- 阐明mRNA结构影响细菌毒性的机制.
- 确定参与mRNA结构介导基因表达的关键调节因素.
主要方法:
- 用二甲基硫酸盐测序 (DMS-seq) 来绘制mRNA结构.
- 实验是在营养丰富和营养缺乏 (最小介质) 条件下进行的.
- 进行基因表达分析以确定关键的调节蛋白.
主要成果:
- 在最小的介质中观察到mRNA结构的显著变化,影响了全球翻译效率 (TE).
- 在营养缺乏条件下,发现Hfq蛋白的表达会增加.
- 转录调节器RpoS和CysB被确定为Hfq表达的直接激活剂.
结论:
- 营养压力诱导了Pseudomonas syringae中显著的mRNA结构变化,导致翻译效率的改变和毒性增加.
- 由RpoS和CysB调节的Hfq蛋白在这种mRNA介导的调节途径中起着核心作用.
- Hfq的保存性及其与RpoS的相互作用表明,在细菌中,基于RNA的基因控制和反循环具有广泛重要的机制.
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