由Vibrio harveyi中的hfq零突变引起的Pleiotropic表型
Yiqin Deng1, Shujun Zang1, Ziyang Lin1
1Key Laboratory of South China Sea Fishery Resources Exploitation & Utilization, Ministry of Agriculture and Rural Affairs, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China.
Microorganisms
|November 25, 2023
概括
这种Hfq蛋白对Vibrio harveyi的毒性至关重要,它调节了运动性和生物膜的形成. 删除Hfq显著降低了细菌的毒性,并影响了基因表达.
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:
- Hfq是细菌中的全球调节剂,对通过小调节RNA (sRNA) 进行转录后基因调节至关重要.
- 了解Hfq的作用对于破译细菌毒性机制至关重要,特别是在像Vibrio harveyi这样的海洋病原体中.
研究的目的:
- 调查Hfq在调节Vibrio harveyi.yi.毒性中的作用.
- 阐明Hfq影响细菌生理学和致病性的分子机制.
主要方法:
- 在V.中构建和描述一个无基因突变体 (∆hfq). 哈维伊菌株345.5. 这种菌株
- 通过宿主死亡率测试 (珍珠) 评估细菌毒性.
- 转录组分析 (RNA-Seq) 来识别差异表达的基因和sRNAs.
主要成果:
- ∆hfq突变显示对珍珠的毒性完全丧失,死亡率为0%,而野生类型的死亡率为80%.
- ∆hfq突变体表现出生长,运动,生物膜形成受损,以及对氧化应激和抗生素的抗性降低.
- 转录组分析显示,在16.39%的V.中出现了显著的变化. 哈维基基因,抑制毒性相关途径,如鞭毛组装和化学反应.
- 在没有Hfq的情况下,参与抗生素耐药性,外膜蛋白质合成,电子运输,氨基酸代谢和生物膜形成的11种sRNA显著下调.
结论:
- Hfq是V的关键正调节器. 毒性,主要是通过促进细菌的运动性和生物膜的形成.
- Hfq很可能通过结合sRNA来调节关键毒性途径中涉及的目标mRNA的表达来发挥其调节功能.
- 这项研究强调了Hfq在细菌生理学和发病过程中的多方面的作用,为控制V.提供了潜在的标. 哈维伊的感染.
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