针对核糖体的双功能合二次代谢物
Emilianne M Limbrick1, Michael Graf2, Dagmara K Derewacz1
1Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, United States.
Journal of the American Chemical Society
|July 26, 2020
概括
研究人员从Micromonospora carbonacea中发现了新的抗生素,即N和O. 这些化合物是埃弗尼尼米辛和罗萨米辛的结合物,通过向多个核糖体结合部位,显示出抗生素耐药性的潜力.
科学领域:
- 微生物学
- 自然产品化学
- 分子生物学
背景情况:
- 微生物可以产生多种抗生素,但联合作用很罕见.
- 埃弗尼诺米辛的生产者Micromonospora carbonacea含有尚未发现的生物活性代谢物.
- 抗生素抵抗需要新的治疗策略.
研究的目的:
- 为了研究氧化酶编码基因在Micromonospora carboncea.
- 描述生物体产生的新型抗生素化合物.
- 探索这些新型结合物的作用机制和潜力.
主要方法:
- 氧化酶编码基因的遗传功能分析.
- 新型抗生素的分离和结构阐明 (N,O和P的恒尼诺基因).
- 核糖体结合研究,包括连接物位移和化学保护试验.
- 对抗性突变的分析.
主要成果:
- 发现了N和O的Everninomicins,它们是由子部分连接的Everninomicin和Rosamicin的结合物.
- 通过非酶凝聚形成的Everninomicin P作为前体的鉴定
- 埃弗尼诺素P结合于宏和正素的核糖体位点.
- 通过准直角结合点来克服抗性突变.
结论:
- 对正交抗生素药的策略进行演示.
- 对抗生素显著的共价变异有明显的耐受性.
- 通过双部位向提出了一种新方法来对抗抗生素耐药性.
相关概念视频
Types of RNA
72.0K
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...
72.0K
Types of RNA
8.6K
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...
8.6K
Riboswitches
9.3K
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...
9.3K
Transcriptional Regulation: Riboswitches
393
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...
393
Ribosome Profiling
4.0K
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...
4.0K
Translational Regulation
427
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,...
427


