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相关概念视频

Humoral Immune Responses01:36

Humoral Immune Responses

Overview
Antibody Structure01:10

Antibody Structure

Overview
Antibodies, also known as immunoglobulins (Ig), are essential players of the adaptive immune system. These antigen-binding proteins are produced by B cells and make up 20 percent of the total blood plasma by weight. In mammals, antibodies fall into five different classes, which each elicits a different biological response upon antigen binding.
The Y-Shaped Structure of Antibodies Consists of Four Polypeptide Chains
Antibodies consist of four polypeptide chains: two identical heavy...
Immunoglobulin-like Cell Adhesion Molecules01:31

Immunoglobulin-like Cell Adhesion Molecules

Immunoglobulin-like cell adhesion molecules or Ig-CAMs are a versatile group of cell surface glycoproteins belonging to the immunoglobulin protein superfamily. Ig-CAMs possess the characteristic immunoglobulin protein domains and other domains such as the fibronectin type III domain. The Ig domains are glycosylated to varying degrees in different Ig-CAMs.
Ig-CAMs exhibit either homophilic binding (to other Ig-CAMs) or heterophilic binding (to other ligands such as integrins). While most Ig-CAMs...
Antibody Structure and Classes01:25

Antibody Structure and Classes

Antibodies, also known as immunoglobulins, are produced by B cells in response to foreign substances, such as bacteria and viruses. These proteins are critical for recognizing and neutralizing these substances, protecting the body from potential harm.
The basic structure of an antibody consists of four protein chains: two identical heavy chains and two identical light chains. These chains are held together by disulfide bonds and other non-covalent interactions, forming a Y-shaped structure.
Antibody Actions01:26

Antibody Actions

Antibodies, or immunoglobulins, are critical players in the immune system's arsenal against invading pathogens. Produced by B cells and plasma cells, their primary role is to detect and bind to specific antigens, molecules found on the surface of pathogens like bacteria or viruses. Beyond antigen recognition, antibodies perform several vital functions that contribute to immune defense.
Neutralization
Antibodies can bind to pathogens, preventing them from infecting host cells. This process...
Complement System01:27

Complement System

The complement system is a group of approximately 20 plasma proteins that strengthen the body's defenses against infections through opsonization, inflammation, and cell lysis. Opsonization involves coating pathogens with complement proteins, making them more recognizable and facilitating phagocyte engulfment. Certain complement proteins induce inflammation that attracts immune cells to the site of infection. Cell lysis involves the destruction of pathogens through the formation of a membrane...

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相关实验视频

Updated: Jun 9, 2026

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
06:29

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

Published on: January 29, 2014

定义补充活性IgM的特征

Michael J Watson1, Charlie C Mundorff1, Eric M Lynch2

  • 1Department of Medicinal Chemistry, University of Washington, Seattle, WA 98195, United States.

Journal of molecular biology
|March 28, 2025
PubMed
概括
此摘要是机器生成的。

免疫球蛋白M (IgM) 抗体在与抗原结合时激活补充. 这项研究揭示了IgM的Fc域中的特定结构变化,这些变化引发了这一关键的免疫反应.

关键词:
在HDX-MS中使用HDX-MS.的IgM IgM 的情况.补充激活是补充的激活.德是最重要的.免疫球蛋白是一种免疫球蛋白.

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Double Labeling Immunofluorescence using Antibodies from the Same Species to Study Host-Pathogen Interactions
07:35

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相关实验视频

Last Updated: Jun 9, 2026

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells
06:29

Methods for Quantitative Detection of Antibody-induced Complement Activation on Red Blood Cells

Published on: January 29, 2014

A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection
09:12

A Protein Microarray Assay for Serological Determination of Antigen-specific Antibody Responses Following Clostridium difficile Infection

Published on: June 15, 2018

Double Labeling Immunofluorescence using Antibodies from the Same Species to Study Host-Pathogen Interactions
07:35

Double Labeling Immunofluorescence using Antibodies from the Same Species to Study Host-Pathogen Interactions

Published on: July 10, 2021

科学领域:

  • 免疫学 免疫学 免疫学
  • 结构生物学 结构生物学
  • 生物化学 生物化学

背景情况:

  • 免疫球蛋白M (IgM) 对于早期的适应性免疫和强烈的补充激活至关重要.
  • 在抗原结合时,IgM介导的补充激活的结构基础尚未完全理解.

研究的目的:

  • 研究IgM在抗原结合时的结构转变,从而导致补充成分C1的激活.
  • 阐明补充活性IgM构造的功能和结构特征.

主要方法:

  • 在体外补充激活测试.
  • 生物层干涉测量C1结合动力学.
  • 用质谱测量进行/交换以进行构造分析.

主要成果:

  • 只有在形成具有表面显示抗原的多价值复合物时,IgM才能启动补充激活.
  • 在过渡到活性构造过程中,Fc域的关键结构变化被确定.

结论:

  • 多价抗原结合对于IgM启动的补体激活至关重要.
  • 在IgM的Fc域中的特定构造变化定义了其补充活性状态,澄清了关键的免疫机制.