在真菌细菌中通过核糖体分裂和rRNA破坏的耐药性
Soneya Majumdar1, Amuliya Kashyap2, Ravi K Koripella1
1Division of Translational Medicine, New York State Department of Health, Albany, NY.
bioRxiv : the preprint server for biology
|June 25, 2024
概括
菌根HflX蛋白质通过破坏核糖体功能和隔离与抗生素结合的子单元,防止细菌生长,帮助抗生素耐药性. 这种机制涉及核糖体分裂和非活性化核糖体子单元.
科学领域:
- 结构生物学 结构生物学
- 微生物学 微生物学
- 分子生物学分子生物学
背景情况:
- HflX蛋白因其在拯救停滞的核糖体中的作用而闻名,并且与细菌的抗生素耐药性有关.
- 菌根菌具有独特的抗生素抵抗机制.
研究的目的:
- 为了阐明与核糖体子单元复合的真菌HflX的高分辨率结构.
- 揭示HflX介导的核糖体分裂和真菌细菌抗生素耐药性的独特机制.
主要方法:
- 使用了高分辨率的冷电子显微镜 (cryo-EM).
- 确定了真菌菌HflX与核糖体及其50S子单元的结构,无论是使用抗生素还是不使用抗生素.
主要成果:
- 确定了HflX介导的核糖体分裂和23SrRNA螺旋体的持续性破坏的新型机制.
- 菌根HflX作为一种抗结合因子,与先前分离的50S子单元结合.
- 在真菌细菌中,一种独特的HflX插入与代转移酶中心相互作用,与类和林科萨胺类抗生素重叠.
结论:
- 菌根HflX通过隔离与抗生素结合的非活性50S子单元而不是直接排斥而产生抗生素耐药性.
- 这些发现提供了对菌根菌中的新型抗生素耐药性策略的结构性见解.
相关概念视频
Types of RNA
63.5K
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...
63.5K
Riboswitches
8.1K
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...
8.1K
Transcription Attenuation in Prokaryotes
15.3K
Transcriptional attenuation occurs when RNA transcription is prematurely terminated due to the formation of a terminator mRNA hairpin structure. Bacteria use these hairpins to regulate the transcription process and control the synthesis of several amino acids including histidine, lysine, threonine, and phenylalanine. Transcription attenuation takes place in the non-coding regions of mRNA.
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
There are several different mechanisms used to attenuate transcription. In ribosome mediated...
15.3K
Treatment Resistant Cancers
3.3K
Cancer is the second leading cause of death in the United States. A cancer cell is genetically unstable and hence can mutate faster. They can also modify their microenvironment and escape immune surveillance. The difficulties in treating cancer are further compounded by the emergence of rapid resistance to anticancer drugs. The most common ways to attain resistance in cancer cells include alteration in drug transport and metabolism, modification of drug target, elevated DNA damage response, or...
3.3K
Defense Against Bacterial Pathogens
1.4K
The human immune system is a complex network of cells, tissues, and organs that work together to defend the body against bacterial infections. It consists of various immune cells, each playing a specific role in the defense mechanism.
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
Phagocytes
Phagocytes are the frontline soldiers of the immune system. They include neutrophils and macrophages. Neutrophils are the most abundant type of white blood cell and are quickly mobilized to the site of infection. Macrophages are larger cells that patrol...
1.4K
Ribosomal 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


