ribo-switch 调节基因对于 Pseudomonas aeruginosa 的重要性
Shirin Jahangirnejad1, Jean-Philippe Côté1, Daniel A Lafontaine1
1Department of Biology, Faculty of Science, RNA Group, Université de Sherbrooke, Sherbrooke, Quebec, Canada, J1K 2R1.
Journal of molecular biology
|February 20, 2026
概括
针对细菌核糖开关的新型抗生素是有希望的. 研究人员确定S-adenosyl-homocysteine (SAH) 酸酶是Pseudomonas aeruginosa在营养限制下生存的关键,这表明它是潜在的抗生素标.
科学领域:
- 微生物学和分子生物学
- 发现抗微生物药物 发现抗微生物药物
背景情况:
- 丝带切换器是具有抗生素标潜力的调节性RNA元素.
- 识别关键的 рибо开关控制基因对于开发新型抗菌药物至关重要.
- 已知的有限数量的重要核糖突变点阻碍了抗生素的开发.
研究的目的:
- 在营养有限的条件下,在Pseudomonas aeruginosa中识别必要的 рибо开关控制基因.
- 评估S-adenosyl-homocysteine (SAH) рибо开关作为潜在的抗菌标.
主要方法:
- 利用Pseudomonas aeruginosa的转子子库来选riboswitch控制的基因的基本性.
- 在营养有限的条件下评估细菌生长,有或没有S-adenosyl-methionine补充剂.
- 采用RT-qPCR分析SAH рибо交换机介导的基因表达.
- 在实验室中对SAH核糖开关-SAH相互作用进行了结构分析.
主要成果:
- 大多数由 рибо开关控制的基因对P. aeruginosa生长无关紧要.
- 在营养有限的条件下,S-adenosyl-homocysteine (SAH) 酶基因的失活完全抑制了生长.
- 通过补充S-adenosyl-methionine恢复了细菌的生长.
- 在SAH核开关显示SAH依赖的调节和结构变化在绑定.
结论:
- 在营养限制下,SAH酸酶基因对于P. aeruginosa的生存至关重要.
- 感应SAH的核糖开关是开发针对P. aeruginosa的新型抗生素的有希望的目标.
- 这项研究提供了一种方法,用于在营养有限的环境中发现新的 ribowitch 目标.
更多相关视频
08:57Identification of Novel Genes Associated with Alginate Production in Pseudomonas aeruginosa Using Mini-himar1 Mariner Transposon-mediated Mutagenesis
Published on: March 10, 2014
12.8K
07:10A Fluorescence-based Method to Study Bacterial Gene Regulation in Infected Tissues
Published on: February 19, 2019
9.5K
相关概念视频
01:56Riboswitches
9.8K
Riboswitches are non-coding mRNA domains that regulate the transcription and translation of downstream genes without the help of proteins. Riboswitches bind directly to a metabolite and can form unique stem-loop or hairpin structures in response to the amount of the metabolite present. They have two distinct regions – a metabolite-binding aptamer and an expression platform.
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
The aptamer has high specificity for a particular metabolite which allows riboswitches to specifically regulate...
9.8K
01:23Types of RNA
73.3K
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...
73.3K
01:23Transcriptional Regulation: Riboswitches
881
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...
881
01:28Gene Regulation in Microbial Communities: Quorum Sensing
750
Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
750
01:29Translational Regulation
701
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,...
701
01:28Global Regulatory Systems
759
Global regulatory systems in bacteria enable rapid and coordinated responses to environmental changes by integrating sensory inputs with gene expression, ensuring efficient adaptation to fluctuating conditions. Key global regulatory mechanisms include regulons, two-component systems, sigma factors, and secondary messengers.Regulons and Global RegulatorsA regulon is a collection of genes and operons controlled by a common global regulator. These regulators enable bacteria to prioritize resource...
759