三重体前融合HIV-1 Env的结构和免疫识别
Marie Pancera1, Tongqing Zhou1, Aliaksandr Druz1
1Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA.
研究人员确定了人类免疫缺陷病毒1型 (HIV-1) 包裹 (Env) 尖端在封闭状态下的结构. 这为HIV-1进入机制和用于疫苗开发的抗体识别提供了洞察力.
科学领域:
- 结构生物学 结构生物学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 人类免疫缺陷病毒1型 (HIV-1) 包裹 (Env) 尖端介导病毒进入宿主细胞.
- 恩维是中和抗体的主要目标,也是HIV-1疫苗开发的重点.
研究的目的:
- 为了确定成熟的,封闭的形状的HIV-1 Env trimer的高分辨率结构.
- 阐明gp41的融合前结构,并了解病毒进入所需的构造变化.
主要方法:
- 采用X射线晶体学,以3.5 Å分辨率确定HIV-1 Env片的结构.
- 使用PGT122和35O22的抗体稳定并捕获Env尖的成熟封闭状态.
主要成果:
- 该结构揭示了gp41的融合前形状,形成了一个膜-近接项圈.
- 确定了关键的结构特征,包括一个gp41-typtophan扣,并指出它们在聚变激活中的作用.
- 该研究绘制了有效的HIV-1中和反应的患病率和位置,突出了对N链 glycans 的识别和对表位变异的耐受性.
结论:
- 确定的结构为HIV-1 Env尖峰在进入过程中的构造状态提供了关键的见解.
- 了解这些结构参数对于设计有效的HIV-1疫苗和治疗抗体至关重要.
- 这些发现提升了我们对HIV-1使用的免疫逃避策略的了解,并确定了抗体识别的目标.
更多相关视频
07:29Determination of Molecular Structures of HIV Envelope Glycoproteins using Cryo-Electron Tomography and Automated Sub-tomogram Averaging
Published on: December 1, 2011
10:50Assessment of Immunologically Relevant Dynamic Tertiary Structural Features of the HIV-1 V3 Loop Crown R2 Sequence by ab initio Folding
Published on: September 15, 2010
相关概念视频
Viral Structure
Antigens Involved in Adaptive Immunity
Complete Antigens
Complete antigens possess both immunogenicity and...
T Cell Activation and Clonal Selection
Naive T cells that have not yet encountered an antigen express two primary CD...
Immune Response Against Viral Pathogens
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Antibody Structure
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...
Antibody Structure
