对大肠杆菌表写体的直接RNA测序揭示了热应激下的变化
Sebastián Riquelme-Barrios1, Leonardo Vásquez-Camus1, Siobhan A Cusack1
1Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany.
Nucleic acids research
|March 21, 2025
概括
这项研究揭示了在热应激下使用直接RNA测序的细菌表转录组动态. 大肠杆菌中的RNA修饰发生显著的变化,影响基因表达和细胞过程.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 微生物学 微生物学
背景情况:
- 表体转录组,或RNA修饰,调节了真核生物的基因表达,但在 prokaryotes 了解得很少.
- 了解细菌表写体对解读转录后调节至关重要.
研究的目的:
- 在热应激下研究大肠杆菌中的RNA修饰.
- 描述表皮转录组在细菌适应中的作用.
主要方法:
- 对大肠杆菌的纳米孔直接RNA测序.
- 质谱学,删除突变物和PCR用于RNA修饰分析.
- 在体外甲基化试验.
主要成果:
- 在rRNA,tRNA和mRNA中检测到多个RNA修饰.
- 在rRNA中已确认已知的5-甲基丁 (m5C) 和N6-甲基氨酸 (m6A);在mRNA中局部的m5C和m6A.
- 在热应激下观察到16SrRNA中m5C,m6A和N6,N6-二甲基亚丁诺辛的增加.
- 在45°C的反子循环中发现tRNA修饰丰度下降.
- 在热应激下显示了mRNA修饰丰富的转移,从代谢/RNA处理基因到细胞壁/膜传输基因.
结论:
- 直接RNA测序对于研究细菌表转录组是有效的.
- 热应激诱导细菌RNA修饰的显著变化.
- 经转录体调节在细菌应激反应和适应中发挥作用.
相关概念视频
RNA Stability
33.1K
Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...
33.1K
Ribosome Profiling
3.4K
Ribosome profiling or ribo-sequencing is a deep sequencing technique that produces a snapshot of active translation in a cell. It selectively sequences the mRNAs protected by ribosomes to get an insight into a cell’s translation landscape at any given point in time.
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
Applications of ribosome profiling
Ribosome profiling has many applications, including in vivo monitoring of translation inside a particular organ or tissue type and quantifying new protein synthesis levels.
The technique...
3.4K
RNA-seq
9.7K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
9.7K


