独特的膜适应性特征支持HIV-1抗体对MPER的中和活性
Carmen Domene1, Brian Wiley1,2, Sara Insausti3,4
1Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AX, U.K.
Molecular pharmaceutics
|April 9, 2025
概括
广泛中和的抗体向HIV的膜近端外部区域 (MPER) 适应病毒膜. 这种适应对于有效的中和至关重要,并为新型艾滋病毒疫苗的设计提供信息.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 结构生物学 结构生物学
背景情况:
- 艾滋病毒包膜糖蛋白的膜近端外部区域 (MPER) 是广泛中和抗体 (bnAbs) 的关键目标.
- 针对MPER的bnAbs需要与病毒膜相互作用,以获得最佳的抗原识别和中和.
研究的目的:
- 阐明bnAbs,特别是10E8与病毒膜相互作用的分子机制.
- 了解这种相互作用对bnAb 10E8.8抗病毒功能的相关性.
主要方法:
- 在三个系统上进行了全原子分子动力学模拟:Fab 10E8单独在类似病毒的脂质双层 (VL-LB) 上,Fab 10E8与MPER/跨膜域 (TMD) 复合体在VL-LB上,以及优化的Fab 10E8变体与MPER-TMD在VL-LB上.
- 通过比较模拟系统来得出原子尺度的Fab膜容纳配置文件.
主要成果:
- 这项研究得出了Fab 10E8如何适应病毒膜接口的原子尺度概况.
- 在表皮质结合后,Fab对病毒膜的适应被确定为MPER向中和活性的关键.
结论:
- 对病毒膜的Fab适应对于针对HIVMPER的bnAbs的中和功能至关重要.
- 获得的见解可以指导基于MPER的生物制品和疫苗的设计,用于预防和治疗艾滋病毒.
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