在Hfq授权的RNA-RNA互动组中
Michael J Gebhardt1, Elizabeth A Farland1, Pallabi Basu1
1Division of Infectious Diseases, Boston Children's Hospital and Department of Pediatrics, Harvard Medical School, Boston, MA 02115.
概括
配合RNA的Hfq可以帮助小RNA (sRNA) 调节细菌. 在Pseudomonas aeruginosa中,PhrS被发现可以控制许多目标,而不仅仅是一个,通过双层机制影响定数感应.
科学领域:
- 细菌学 细菌学是一门学科.
- 在RNA生物学,RNA生物学.
- 基因规则 基因规则
背景情况:
- 通过调解RNA-RNA相互作用,RNA伴侣Hfq对细菌基因调节至关重要.
- Pseudomonas aeruginosa 具有众多的小RNA (sRNA),但它们的mRNA点和功能在很大程度上没有特征.
- 了解sRNA-目标相互作用是解读细菌中的调节网络的关键.
研究的目的:
- 在Pseudomonas aeruginosa中使用Hfq依赖RNA-RNA相互作用测序 (RIL-seq) 识别sRNA的mRNA标.
- 为了研究sRNA PhrS的调节机制,以前认为只针对一个mRNA.
- 阐明PhrS在质量检测信号PQS的合成中的作用.
主要方法:
- 在Pseudomonas aeruginosa中利用RIL-seq (RNA-chaperone依赖相互作用和深度测序) 来绘制RNA-RNA相互作用的地图.
- 生物信息分析以确定通过Hfq.介导的sRNA-mRNA配对.
- 实验验证PhrS-mRNA相互作用及其对基因表达的功能后果.
主要成果:
- 确定了P. aeruginosa.中众多已知和新型sRNA的mRNA标.
- 发现了涉及sRNA PhrS的广泛的RNA-RNA相互作用,揭示了它针对数百个转录.
- 证明PhrS用于PQS合成的双层调节机制,控制MvfR和AntR转录调节器.
结论:
- 在P. aeruginosa中,PhrS充当了基石sRNA,通过直接基配对来调节广泛的转录谱.
- 这项研究揭示了一个复杂的,双层的PQS合成的调节途径,由PhrS.
- 这些发现扩大了sRNA的已知目标,并突出了PhrS作为这种机会性病原体中的主调节器.
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