预流结构,HSV-1糖蛋白B的逃避和中和
Ryan S Roark1,2,3, Andrew J Schaub4, Wei Shi4
1Aaron Diamond AIDS Research Center, Columbia University Vagelos College of Physicians and Surgeons, New York, NY, USA.
Nature microbiology
|November 1, 2025
概括
研究人员稳定了简单疹病毒1糖蛋白B (HSV-1 gB) 在其预注射形式. 一种新型抗体通过准重新折叠的区域来中和HSV-1,揭示了病毒逃避的机制.
科学领域:
- 病毒学 病毒学
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
背景情况:
- 疹病毒的进入依赖于在输血前和输血后状态之间重新折叠的葡萄糖蛋白B (gB).
- 开发预注射特异性中和抗体一直很困难,阻碍了有效的抗病毒策略.
研究的目的:
- 为了稳定简单疹病毒的输血前域1糖蛋白B (HSV-1 gB).
- 为了确定预注射HSV-1 gB的结构.
- 为了隔离和表征预注射特异性中和抗体,针对HSV-1 gB.
主要方法:
- 稳定HSV-1 gB在其预注射形状中的稳定.
- 低温电子显微镜 (cryo-EM) 用于结构确定 (2.94.1 Å分辨率).
- 一种新型预注射特异性中和抗体 (WS.HSV-1.24) 的分离和表征.
主要成果:
- 成功稳定并确定了输血前HSV-1 gB的结构.
- 诱导的抗体结合了输血前和输血后的gB,但没有显著的血清中和.
- 确定了WS.HSV-1.24,一种中和抗体,准了对中和至关重要的域界面重新折叠区域.
- 揭示了iso-surface暴露和结构可塑性作为预注射HSV-1 gB.的关键特征.
结论:
- 预融合HSV-1 gB利用iso-surface显示和结构可塑性来逃避大多数抗体中和.
- 已识别的抗体WS.HSV-1.24针对一个易受攻击的重新折叠区域,为抗病毒开发提供了潜在的途径.
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