一个I类MHC分子的净化空和填充形式的热稳定性比较
M L Fahnestock1, I Tamir, L Narhi
1Division of Biology, California Institute of Technology, Pasadena 91125.
Science (New York, N.Y.)
|December 4, 1992
概括
空的I类主要基因相容性复合体 (MHC) 分子保持结构完整性和免疫反应性. 结合稳定了MHC I类分子,增强了它们对热变质的抵抗力.
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:
- 主体自身相容性复合体 (MHC) I类分子向T细胞呈现抗原.
- 结对MHC I类分子的稳定性和正确折叠至关重要.
- 了解无类MHC I类的结构和功能性质是必不可少的.
研究的目的:
- 研究无类I级MHC分子的结构和免疫特性.
- 确定结对I类MHC分子热稳定性的影响.
主要方法:
- 一个分泌的I类MHC分子的化和体外再化.
- 改性异构体的热稳定性分析.
- 计算自由能量来量化结稳定性的计算.
主要成果:
- 没有的I类异构体具有免疫反应,结构上与结合的形式相似.
- 与结形式相比,空的异构体表现出较低的热稳定性.
- 显著的空异体体群在生理温度下保持了原生形状.
结论:
- 一类MHC分子可以在没有的情况下采用稳定的本地形状.
- 结合显著稳定了MHC I类分子,增加了它对热变性化的抵抗力.
- 这项研究提供了对MHC I类分子中类诱导稳定性的定量测量.
相关概念视频
01:26Antigens Involved in Adaptive Immunity
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 reactivity.
Complete Antigens
Complete antigens possess both immunogenicity and reactivity.
01:31Antigen Processing Pathways
MHC molecules are key players in the immune response, enabling T cells to recognize and respond to specific antigens. They are present on the surface of all nucleated cells in the body and are instrumental in presenting antigens to T cells and activating them. T cells recognize the MHC-antigen complex and initiate an immune response. MHC class I and MHC class II are two main types of MHC molecules, each associated with a distinct antigen processing pathway.
MHC Class I: Presenting Endogenous...
MHC Class I: Presenting Endogenous...