缺少N相关的糖化酶会损害B7-H6的免疫功能
Hanqing Chen1,2, Yang Zhang3, Yu Shen1
1Jiangsu Institute of Clinical Immunology, the First Affiliated Hospital of Soochow University, Suzhou, China.
Frontiers in immunology
|November 30, 2023
概括
B7-H6的N连接糖化对其在触发NK细胞激活的功能至关重要. 特定的位点,N43和N208,对于B7-H6稳定性,膜表达和NK细胞介导免疫力至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
- 葡萄糖生物学 葡萄糖生物学
背景情况:
- B7-H6是一种免疫检查点分子,增强NK细胞细胞毒性.
- 在B7-H6功能中N-糖化酶的作用仍然在很大程度上未知.
研究的目的:
- 研究N-糖化对B7-H6蛋白功能的影响.
- 为了确定B7-H6活性关键的特定N-糖化位.
主要方法:
- PNGF酶消化和尼卡米辛处理以确认N-糖化.
- 位点导向的突变发生和电泳,以确定功能性糖化位点.
- 植物遗传学和结构分析,以评估糖甘的保存.
主要成果:
- B7-H6经历N-糖化,已确定了6个功能位点.
- 在的脊椎动物中保留了N43和N208的糖化位点.
- 这些部位对于B7-H6-介导的NK细胞激活,稳定性和膜表达至关重要.
- N208糖化防止B7-H6脱落,而N43突变损害了NKp30的结合.
结论:
- 与N相关的糖化对B7-H6的生物功能有显著影响.
- N43和N208糖化位点对于B7-H6活性至关重要.
- 向这些糖化位可以调节NK细胞介导的免疫力.
相关概念视频
B Cell Activation and Differentiation
1.7K
The adaptive immune response, a sophisticated defense mechanism, relies on the activation and differentiation of B lymphocytes, or B cells. These processes enable our bodies to mount a tailored response against specific pathogens such as bacteria, free virus particles, toxins, and parasites.
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
When naive B cells encounter a specific antigen that can bind to the B cell receptor (BCR) on their surface, they undergo sensitization to respond to the antigen's presence. Sensitization begins with...
1.7K
Proteoglycans
3.9K
Glycans, a class of complex heterogeneous molecules, can be covalently attached to proteins to form glycosylated proteins that regulate various physiological and pathological processes. Glycosylated proteins or glycoproteins comprise N-linked and O-linked oligosaccharides. O-glycosylation is the most common type of protein glycosylation. Here, glycans attach to the oxygen atom of the hydroxyl groups of Serine or Threonine residues. O-linked glycosylation occurs later in protein processing,...
3.9K
Immunodeficiency Diseases
947
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
There are three main causes of immunodeficiency...
947
Antigens Involved in Adaptive Immunity
502
An antigen is any substance the immune system identifies as foreign and potentially harmful to the body, prompting an immune response. Antigens have two functional properties: immunogenicity and reactivity. Immunogenicity is the ability of an antigen to stimulate a specific immune response. At the same time, reactivity describes the antigen's ability to react with the cells and antibodies produced in response to it.
Complete Antigens
Complete antigens possess both immunogenicity and...
Complete Antigens
Complete antigens possess both immunogenicity and...
502
Humoral Immune Responses
72.8K
Overview
72.8K
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


