对差异性抗化物耐药Staphylococcus aureus菌株的核糖体进行结构研究
André Rivalta1, Aliza Fedorenko1, Alexandre Le Scornet2
1Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel.
Life science alliance
|June 9, 2025
概括
黄金葡萄球菌 (Staphylococcus aureus) 的抗菌耐药性是一个日益严重的威胁. 这项研究揭示了索利特罗米如何与耐药细菌核糖体结合,为开发新抗生素对抗耐药性感染提供了洞察力.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 药物发现 药物发现 药物发现
背景情况:
- 抗菌素耐药性 (AMR) 是一个重要的全球健康问题.
- 宏类抗生素对诸如金黄色葡萄球菌 (Staphylococcus aureus) 这样的病原体正在失去有效性.
- 埃尔姆家族的甲基转移酶通过修改23S核糖体RNA而导致宏类耐药性.
研究的目的:
- 为了研究 Staphylococcus aureus 中的化物-核糖体相互作用的结构基础.
- 了解ErmB介导的甲基化如何影响药物结合.
- 探索克服S. aureus中宏类耐药性的策略.
主要方法:
- 低温电子显微镜 (cryo-EM) 用于确定高分辨率的核糖体结构.
- 对具有不同 ermB 表达的金黄色菌株进行分析.
- 微生物学和生物化学分析以验证药物结合和耐药性.
主要成果:
- 确定了与索利胺结合的核糖体的高分辨率结构,包括具有A2058二甲基化的核糖体.
- 鉴定出了使索利思罗米辛结合的特定相互作用,尽管存在耐药性机制.
- 结构发现得到了微生物学和生物化学数据的支持.
结论:
- 索利思素可以结合耐药的金黄色细菌核糖体,即使是A2058二甲基化.
- 了解这些相互作用可以指导新型基托利德的开发.
- 进一步优化化物-核糖体相互作用可能会增强对抗耐药性黄金色杆菌的疗效.
相关概念视频
02:24Ribosome Profiling
3.5K
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...
3.5K
01:23Types of RNA
63.4K
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...
63.4K
02:53Ribosomal RNA Synthesis
13.2K
Ribosome synthesis is a highly complex and coordinated process involving more than 200 assembly factors. The synthesis and processing of ribosomal components occurs not only in the nucleolus but also in the nucleoplasm and the cytoplasm of eukaryotic cells.
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
Ribosome biogenesis begins with the synthesis of 5S and 45S pre-rRNAs by distinct RNA polymerases. The primary transcripts are extensively processed and modified before they are bound and folded by ribosomal proteins and assembly factors,...
13.2K