非亲属性免疫蛋白提供了更广泛的防御在微生物群落中对细菌间效应物的防御
Abigail Knecht1,2, Denise Sirias1, Daniel R Utter3,4
1Departments of Molecular and Cellular Biology, Harvard University, Cambridge, United States.
eLife
|September 30, 2025
概括
细菌免疫蛋白可以防止各种效应因子,甚至是非同类的效应因子. 这挑战了现有的模型,并揭示了影响微生物社区动态的新机制.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 系统生物学 系统生物学
背景情况:
- 微生物群落是复杂的社会,细菌通过分泌的蛋白质相互作用,称为效应器.
- 现有的模型表明,免疫蛋白保护于特定的 (同源的) 作用因子,其交叉反应性有限.
研究的目的:
- 研究一种新发现的细菌免疫蛋白家族的保护能力.
- 挑战关于效应体-免疫蛋白相互作用及其特异性的普遍假设.
主要方法:
- 新型免疫蛋白域的特征,对结合和功能至关重要.
- 对 *Proteus mirabilis* 的非亲属效应因子的保护活性进行实验验证.
- 对人类微生物组中效应基因和免疫基因同时出现的模式的分析.
主要成果:
- 一个新的免疫蛋白家族可以结合和中和多样化的,非同源的PD-(D/E) XK含有作用因子.
- 仅仅是绑定对保护活动来说是不够的;特定的领域对功能至关重要.
- 发现效应基因和免疫基因在个体人类微生物组中同时存在.
结论:
- 细菌的保护机制比以前理解的要多样化,包括非相关的相互作用.
- 这些发现扩大了细菌间相互作用如何塑造复杂的微生物生态系统的模型.
- 这些基因的共同存在表明它们在调节人类微生物社区结构中的作用.
相关概念视频
Defense Against Bacterial Pathogens
2.6K
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...
2.6K
Antimicrobial Proteins
13.0K
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...
13.0K
Cross-reactivity
32.8K
Overview
32.8K
Defense Mechanism Against Infection
9.2K
Natural flora, body system defenses, and inflammation are natural barriers of the body against infectious agents regardless of previous exposure. Normal floras of the human body refer to the microbial population that colonizes the skin and mucous membranes.
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
In addition, many body organ systems have unique defenses against infection. The skin is an intact, multilayered surface preventing invasion by microorganisms unless impaired. Mucous membranes lining the mouth, nose, and eyelids are barriers...
9.2K
Introduction to Innate and Adaptive Immunity
8.8K
The human immune system is a complex defense mechanism that protects the body from harmful pathogens and foreign substances. It comprises two crucial components: innate and adaptive immunity.
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
Innate immunity is the body's natural, nonspecific defense system that acts quickly to protect against pathogens. It incorporates physical barriers like skin and mucous membranes and cellular elements such as phagocytes and natural killer cells. This part of our immune system provides an immediate,...
8.8K
Combined Effects of Drugs: Synergism
6.8K
Synergism is a useful mechanism where combining two or more drugs is more effective than each constituent used alone. Such combinations are also called supra-additive interactions. The drugs collectively enhance the final therapeutic effect by acting on different targets. Another advantage is that the low dose of each constituent drug is sufficient to achieve the desired effect. This helps reduce the duration of therapy and lower the adverse effects of these drugs.
Such synergistic combinations...
Such synergistic combinations...
6.8K


