在Actinobacillus pleuropneumoniae apxIV操作子编码一个抗菌毒素免疫对
Eva Slivenecka1, David Jurnecka1, Jana Holubova1
1Institute of Microbiology of the Czech Academy of Sciences, Videnska 1083, Prague 142 00, Czech Republic.
Microbiological research
|December 31, 2024
概括
阿普西瓦蛋白和ORF1是Actinobacillus pleuropneumoniae中关键的毒性因素. 这项研究揭示了它们的毒素免疫功能和与细菌素的结构相似之处,提高了对猪肺炎的理解.
科学领域:
- 微生物学 微生物学
- 结构生物学 结构生物学
- 细菌病原体的产生
背景情况:
- 阿普西瓦是一种重复中毒素 (RTX) 外蛋白,是猪肺炎的原因 - - Actinobacillus pleuropneumoniae的主要毒性因子.
- 阿普西瓦及其相关的ORF1蛋白对A. pleuropneumoniae的毒性至关重要,但它们的致病机制尚不清楚.
研究的目的:
- 对ApxIVA和ORF1蛋白进行全面的结构和功能分析.
- 阐明它们对A. pleuropneumoniae病原性贡献的基础分子机制.
主要方法:
- 对ApxIVA和ORF1.1的结构分析.
- 功能性检测以确定抗微生物活性和免疫力.
- 对基因表达调节的研究.
主要成果:
- ApxIVA的N终端与素M (ColM) 类细菌素具有结构相似性,具有抗菌活性.
- ORF1作为一种免疫蛋白,保护细菌免受ApxIVA的抗菌作用,这表明有毒素免疫对.
- 胎牛血清可以在体外诱导ApxIVA和ORF1的产生.
结论:
- 阿普西瓦和ORF1形成了一个新的RTX毒素免疫系统.
- 这些发现为RTX决定因素的协调作用和ApxIVA生产的调节提供了洞察力.
- 这项研究增强了对A. pleuropneumoniae适应性和呼吸道入侵策略的理解.
更多相关视频
06:05Using the Overlay Assay to Qualitatively Measure Bacterial Production of and Sensitivity to Pneumococcal Bacteriocins
Published on: September 30, 2014
13.5K
08:51Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling
Published on: June 25, 2015
9.2K
相关概念视频
Antimicrobial Proteins
889
Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...
889
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
Prokaryotic Transcriptional Activators and Repressors
20.8K
The organization of prokaryotic genes in their genome is notably different from that of eukaryotes. Prokaryotic genes are organized, such that the genes for proteins involved in the same biochemical process or function are located together in groups. This group of genes, along with their regulatory elements, are collectively known as an operon. The functional genes in an operon are transcribed together to give a single strand of mRNA known as polycistronic mRNA.
Transcription of prokaryotic...
Transcription of prokaryotic...
20.8K
CRISPR and crRNAs
16.6K
Bacteria and archaea are susceptible to viral infections just like eukaryotes; therefore, they have developed a unique adaptive immune system to protect themselves. Clustered regularly interspaced short palindromic repeats and CRISPR-associated proteins (CRISPR-Cas) are present in more than 45% of known bacteria and 90% of known archaea.
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
The CRISPR-Cas system stores a copy of foreign DNA in the host genome and uses it to identify the foreign DNA upon reinfection. CRISPR-Cas has three different...
16.6K
Exon Recombination
3.5K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.5K
Antibiotic Selection
52.2K
Overview
52.2K
