相关实验视频

Updated: Jan 13, 2026

Quantification of the Abundance and Charging Levels of Transfer RNAs in Escherichia coli

Quantification of the Abundance and Charging Levels of Transfer RNAs in Escherichia coli

Published on: August 22, 2017

寒冷冲击蛋白质在寒冷压力条件下调解了Escherichia coli中的核糖体RNA的转录

Haoxuan Li¹, Anna Maria Giuliodori², Xu Wang¹

¹Engineering Research Center, The Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, College of Life Sciences, Jilin Agricultural University, Changchun 130118, China.

|October 29, 2025

概括

像CspA,CspE和CspI这样的冷冲击蛋白 (CSP) 对于低温下大肠杆菌的生长至关重要. 删除多个CSP基因显著影响16SrRNA合成和细胞在寒冷中的生长.

科学领域:

微生物学微生物学
分子生物学分子生物学
细菌生理学细菌生理学

背景情况:

大肠杆菌对低温具有显著的适应能力.
核糖体生物生成对于细菌在寒冷条件下生长至关重要.
寒冷冲击蛋白 (CSP) 作为分子伴侣,在低温下促进生长.

研究的目的:

研究CSP CspA,CspE和CspI在调节Escherichia coli中的核糖体RNA (rRNA) 转录中的作用.
确定单个和多个CSP基因缺失对细菌生长和低温rRNA合成的影响.

主要方法:

对CspA,CspE和CspI的单个,双重和三重突变的基因删除分析.
在低温下评估细胞生长速度.
在寒冷压力条件下对16SrRNA合成的量化.

主要成果:

在低温下,CspA,CspE或CspI的单基因缺失对生长和rRNA合成的影响很小.
双重和三重基因删除导致显著的生长缺陷和受损的16S rRNA合成.
CspA,CspE和CspI的联合缺失对于维持16SrRNA合成和在低温下最佳生长至关重要.

结论:

在低温下,CspA,CspE和CspI在16SrRNA合成和大肠杆菌细胞生长中发挥着关键的合作作用.
这些发现表明存在补偿机制,可以减轻单个CSP删除的影响.
这些结果强调了多个CSP对于细菌强大的寒冷适应的重要性.

关键词:

抗寒性蛋白质是一种抗寒性蛋白质.这是一种核糖体RNA.转录延长延长转录延长

更多相关视频

Author Spotlight: Exploring Heat Shock Proteins in Malaria and Tuberculosis Infections

Author Spotlight: Exploring Heat Shock Proteins in Malaria and Tuberculosis Infections

Published on: March 8, 2024

Rapid In Vivo Fixation and Isolation of Translational Complexes from Eukaryotic Cells

Rapid In Vivo Fixation and Isolation of Translational Complexes from Eukaryotic Cells

Published on: December 25, 2021

相关概念视频

Stringent Response in E. coli

Stringent Response in E. coli

Bacterial growth is closely tied to nutrient availability, with cells proliferating exponentially under favorable conditions and entering a stationary phase when resources become scarce. This transition is mediated by a regulatory mechanism known as the stringent response, which allows bacteria to adapt to nutrient deprivation by modulating gene expression and metabolic activity.During nutrient scarcity, intracellular amino acid levels decline. It results in the accumulation of uncharged tRNAs...

Other Stress Responses in Bacteria

Other Stress Responses in Bacteria

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...

Translational Regulation

Translational Regulation

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,...

Bacterial Protein Maturation

Bacterial Protein Maturation

Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...

Types of RNA

Types of RNA

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...

Transcriptional Regulation: Riboswitches

Transcriptional Regulation: Riboswitches

Riboswitches are RNA elements that regulate gene expression by altering their secondary structures in response to specific effector molecules. These elements, located in the leader regions of certain mRNAs, act as transcriptional regulators by toggling between alternative conformations to control downstream gene expression. Riboswitch-mediated regulation is a precise mechanism for modulating biosynthetic pathways, as exemplified by the riboflavin biosynthesis pathway in Bacillus...