解开细菌中小RNA和RNase E之间的相互作用
Meshi Barsheshet Vigoda1, Liron Argaman1, Mark Kournos1
1Department of Microbiology and Molecular Genetics, IMRIC, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel.
Nucleic acids research
|July 22, 2024
概括
像GcvB这样的细菌小RNA (sRNA) 可以通过影响标RNA稳定性来影响基因表达. 这项研究表明,GcvB主要增强RNase E裂变,影响大肠杆菌中的转录水平.
科学领域:
- 细菌的基因调节 细菌的基因调节
- RNA与蛋白质的相互作用
- 分子生物学分子生物学
背景情况:
- 小RNAs (sRNAs) 是细菌基因表达的关键调节者,通常通过基配对调节翻译.
- 新兴证据表明,sRNAs也可以通过影响内核酶可访问性来影响目标mRNA的稳定性.
- sRNAs对转录稳定性的大规模影响及其潜在机制在很大程度上仍未被探索.
研究的目的:
- 量化研究特定的sRNA (GcvB) 和内啡核酶 (RNase E) 在调节基因表达中的功能相互作用.
- 阐明sRNAs影响大规模转录稳定的机制.
- 在模型细菌大肠杆菌中描述GcvB和RNase E之间的相互作用模式.
主要方法:
- 在大肠杆菌中利用大规模RNA测序 (RNA-seq) 方法.
- 使用双变异周期方法分析了gcvB和rne单个和双变异的数据.
- 执行了RNase E切割点的全转录组映射,以验证RNA-seq发现.
主要成果:
- 确定了GcvB和RNase E.之间的功能相互作用的不同模式.
- 证明主要的相互作用模式涉及GcvB增强RNase E介导的目标转录的分裂.
- 量化了GcvB对不同位的RNase E裂变增强效应的不同大小.
结论:
- GcvB不仅通过调节翻译,还通过促进其向mRNAs的降解,显著影响基因表达.
- GcvB和RNase E之间的功能相互作用是调节细菌基因表达的关键机制.
- 这项研究提供了对sRNA-endoribonuclease功能相互作用及其对转录稳定性的影响的全面,大规模视图.
相关概念视频
01:23Types of RNA
63.5K
Overview
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
Three main types of RNA are involved in protein synthesis: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA). These RNAs perform diverse functions and can be broadly classified as protein-coding or non-coding RNA. Non-coding RNAs play important roles in the regulation of gene expression in response to developmental and environmental changes. Non-coding RNAs in prokaryotes can be manipulated to develop more effective antibacterial drugs for human or animal use.
RNA...
63.5K
01:23RNA Interference
26.0K
RNA interference (RNAi) is a process in which a small non-coding RNA molecule blocks the post-transcriptional expression of a gene by binding to its messenger RNA (mRNA) and preventing the protein from being translated.
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
This process occurs naturally in cells, often through the activity of genomically-encoded microRNAs. Researchers can take advantage of this mechanism by introducing synthetic RNAs to deactivate specific genes for research or therapeutic purposes. For example, RNAi could be used...
26.0K
00:43Bacterial RNA Polymerase
29.4K
Unlike eukaryotes, bacteria use a single RNA Polymerase (RNAP) to transcribe all genes. The different subunits of bacterial RNAPhave distinct functions. The multisubunit structure of the bacterial RNAP helps the enzyme to maintain catalytic function, facilitate assembly, interact with DNA and RNA, and self-regulate its activity.
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
In most genes, the transcription site is a single base present upstream of the coding sequence. Though RNAP is a catalytically efficient enzyme, it does not recognize...
29.4K
02:47Ribozymes
11.2K
The term ribozyme is used for RNA that can act as an enzyme. Ribozymes are mainly found in selected viruses, bacteria, plant organelles, and lower eukaryotes. Ribozymes were first discovered in 1982 when Tom Cech’s laboratory observed Group I introns acting as enzymes. This was shortly followed by the discovery of another ribozyme, Ribonulcease P, by Sid Altman’s laboratory. Both Cech and Altman received the Nobel Prize in chemistry in 1989 for their work on ribozymes.
Ribozymes can...
Ribozymes can...
11.2K
00:58Eukaryotic RNA Polymerases
24.1K
RNA Polymerase (RNAP) is conserved in all animals, with bacterial, archaeal, and eukaryotic RNAPs sharing significant sequence, structural, and functional similarities. Among the three eukaryotic RNAPs, RNA Polymerase II is most similar to bacterial RNAP in terms of both structural organization and folding topologies of the enzyme subunits. However, these similarities are not reflected in their mechanism of action.
All three eukaryotic RNAPs require specific transcription factors, of which the...
All three eukaryotic RNAPs require specific transcription factors, of which the...
24.1K
02:43Nucleic Acids
44.0K
Nucleic acids are the most important macromolecules for the continuity of life. They carry the cell's genetic blueprint and carry instructions for its functioning.
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
DNA and RNA
The two main types of nucleic acids are deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). DNA is the genetic material in all living organisms, ranging from single-celled bacteria to multicellular mammals. It is in the nucleus of eukaryotes and in the organelles, chloroplasts, and mitochondria. In prokaryotes,...
44.0K