相关实验视频
Updated: Jan 16, 2026

07:02
An Assay for Quantifying Protein-RNA Binding in Bacteria
Published on: June 12, 2019
7.0K
RNA结合蛋白KhpA和KhpB与小调节RNA相互作用,并在Deinococcus radiodurans中影响全球基因表达
bioRxiv : the preprint server for biology
|September 26, 2025
概括
在Deinococcus radiodurans中发现了两种RNA结合蛋白,即KhpA和KhpB. 这些蛋白调节小调节性RNAs (sRNAs) 的稳定性和功能,影响基因表达和放射电阻.
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 是一个遗传学.
背景情况:
- 小调节RNA (sRNA) 对细菌的基因调节至关重要,通常与RNA结合蛋白相互作用,以获得稳定性和效率.
- 与格拉姆阴性物种相比,对格拉姆阳性细菌 (如Deinococcus radiodurans) 中sRNA结合蛋白的知识是有限的.
- Deinococcus radiodurans具有极大的抗辐射能力,使其调节机制对各种应用具有兴趣.
研究的目的:
- 在抗辐射细菌Deinococcus radiodurans中识别和表征新的sRNA结合蛋白.
- 研究这些蛋白质在sRNA稳定性,sRNA-目标相互作用和全球基因调节中的作用.
- 进一步了解D. radiodurans的转录后调节及其对放射电阻的贡献.
主要方法:
- 在D. radiodurans.中识别和表征KhpA和KhpB蛋白质.
- 对KhpA,KhpB和关键细菌sRNA (PprS,DSr9) 之间的相互作用进行分析.
- RNA测序 (RNA-seq) 来评估KhpA和KhpB的全球基因调控作用.
主要成果:
- 在D. radiodurans中,KhpA和KhpB被确定为sRNA结合蛋白,与特定的sRNA相互作用并影响其稳定性.
- 虽然KhpA和KhpB相互相互作用,但它们独立地结合sRNA,而不是作为一个复合体.
- 这些蛋白质促进sRNA-mRNA点相互作用,并在全球基因调节中发挥重叠和特定的作用.
结论:
- KhpA 和 KhpB 是 D. radiodurans. 中转录后网络的关键调节者.
- 这些蛋白质对于调节sRNA活性,基因表达和潜在的细菌极端抗辐射是至关重要的.
- 这些发现表明,KhpA和KhpB同类体代表了格拉姆阳性细菌中sRNA结合蛋白的新家族.
相关概念视频
Types of RNA
72.5K
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...
72.5K
Types of RNA
9.1K
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 regulating 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 Performs Diverse...
RNA Performs Diverse...
9.1K
Translational Regulation
535
Translational regulation in prokaryotes ensures efficient protein synthesis by controlling ribosome access to mRNA. This regulation is mediated by secondary RNA structures, including translational riboswitches, RNA thermometers, and small RNAs (sRNAs), which respond to intracellular and environmental signals to modulate gene expression.Translational RiboswitchesRiboswitches in the leader region of mRNAs can regulate translation by altering the accessibility of the Shine-Dalgarno (SD) sequence,...
535
Bacterial RNA Polymerase
32.5K
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...
32.5K
Other Stress Responses in Bacteria
347
Bacteria have global regulatory systems that control several types of stress mechanisms. These include Pho regulon and the heat shock response, which are essential systems for environmental adaptation, such as nutrient limitation and proteotoxic stress. The Pho regulon and the heat shock response exemplify bacterial resilience, enabling rapid adaptation to fluctuating environmental conditions.Pho RegulonBacteria require phosphorus for essential cellular processes, including nucleic acid...
347
RNA Polymerase II Accessory Proteins
10.8K
Proteins that regulate transcription can do so either via direct contact with RNA Polymerase or through indirect interactions facilitated by adaptors, mediators, histone-modifying proteins, and nucleosome remodelers. Direct interactions to activate transcription is seen in bacteria as well as in some eukaryotic genes. In these cases, upstream activation sequences are adjacent to the promoters, and the activator proteins interact directly with the transcriptional machinery. For example, in...
10.8K

