相关实验视频
Updated: Jul 21, 2025
07:24
Pseudomonas aeruginosa Induced Lung Injury Model
Published on: October 29, 2014
18.6K
在 Pseudomonas 感染期间的免疫激活会导致局部细胞壁重塑,并改变 AGP 积累
Sang-Jin Kim1,2,3, Deepak D Bhandari1,2, Rylee Sokoloski1,2
1Great Lakes Bioenergy Research Center, Michigan State University, East Lansing, MI, 48824, USA.
The Plant journal : for cell and molecular biology
|July 27, 2023
概括
病原体入侵期间植物细胞壁 (CW) 的修改是局部化的,并且取决于病原体的毒性和宿主免疫力. 亚拉比诺 Galactan 蛋白 (AGPs) 对于限制病原体生长至关重要,并为增强植物防御提供了新的目标.
科学领域:
- 植物生物学 植物生物学
- 植物病理学 植物病理学
- 生物化学 生物化学
背景情况:
- 植物细胞壁 (CW) 是一个动态结构,参与植物对病原体的防御.
- 病原体诱导的CW多糖体的修饰对于限制病原体入侵至关重要,但仍然不太了解.
研究的目的:
- 在兼容互动过程中研究植物CW多糖的病原体诱导的变化.
- 确定宿主免疫力和病原体毒性在CW重塑中的作用.
- 为了确定涉及到工厂防御的特定CW组件.
主要方法:
- 使用了Pseudomonas syringae-Arabidopsis thaliana病理系统.
- 采用了CW和免疫信号缺陷突变物的组合.
- 分析了CW多糖化合物组成和沉积模式的变化.
- 进行基因分析以评估特定CW组件的作用.
主要成果:
- 伪omonas感染诱导局部CW修饰,而不是系统性修饰.
- 病原体诱导的CW多糖变化取决于病原体的毒性和宿主免疫反应.
- CW六的积累 (例如,银糖) 是由病原体驱动的,而糖的增加 (阿拉比诺,西洛) 则取决于免疫信号.
- 观察到不同的时间空间模式的阿拉伯甲蛋白 (AGP) 沉积和rhamnogalacturonan修饰.
- 在限制病原体生长方面,Arabinoxylan Pectin Arabinogalactan Protein1 (AXP1) 被确定为关键.
结论:
- 在相容的植物病原体相互作用期间,CW多糖的显著重塑发生.
- AGP在植物对病原体的防御中发挥着至关重要的作用.
- 向AGP为开发抗病原体作物提供了机会.
更多相关视频
06:56A Delayed Inoculation Model of Chronic Pseudomonas aeruginosa Wound Infection
Published on: February 20, 2020
8.5K
11:50Bacterial Leaf Infiltration Assay for Fine Characterization of Plant Defense Responses using the Arabidopsis thaliana-Pseudomonas syringae Pathosystem
Published on: October 1, 2015
21.9K
相关概念视频
01:28Gene Regulation in Microbial Communities: Quorum Sensing
40
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,...
40
01:29Archaeal Cell Wall
49
Archaeal cell walls are structurally and compositionally distinct from their bacterial counterparts, lacking the characteristic peptidoglycan layer found in most bacteria. Instead, archaeal cell walls exhibit remarkable diversity, utilizing materials such as pseudomurein, polysaccharides, and proteins to construct their protective outer layers. This structural flexibility is closely tied to archaea's ecological adaptability.S-Layers: The Common Archaeal Cell WallThe S-layer is the most...
49
01:09GPCRs Regulate Adenylyl Cylase Activity
5.7K
Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
5.7K
01:22Bacterial Cell Wall
59
The bacterial cell wall is an essential structural component that encases the plasma membrane, preserving cellular integrity, determining shape, and protecting against osmotic stress. This rigid yet flexible structure primarily comprises peptidoglycan, a polymer that forms a mesh-like matrix conferring mechanical strength and flexibility.Peptidoglycan Composition and StructurePeptidoglycan, the core of the bacterial cell wall, comprises alternating units of N-acetylglucosamine (NAG) and...
59
01:31Defense 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
01:28Peptidoglycan Synthesis
66
Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan...
66