基于SARS-CoV-2 RBD中和抗体的统一拓分类系统化了各个变体的亲和趋势
Luis Fernando Cofas-Vargas1,2, Paola Mendoza-Espinosa1, Fernando D Montalvo-Sandoval3,4
1Instituto de Química, Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México, México.
mAbs
|October 21, 2025
概括
中和抗体 (NAbs) 的新分类揭示了SARS-CoV-2变种如何逃避抗体保护. 1-3类对Omicron失去亲和力,而4-5类仍然有效,指导未来的疫苗和治疗设计.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- SARS-CoV-2 尖端蛋白的受体结合域 (RBD) 对于病毒进入至关重要,也是中和抗体 (NAbs) 的首要目标.
- 了解病毒进化,特别是SARS-CoV-2变种 (如Omicron) 如何影响NAb疗效,对于开发有效的对策至关重要.
研究的目的:
- 开发针对SARS-CoV-2 RBD的NAbs的综合性,基于拓的分类.
- 分析病毒进化对NAb结合亲和力的影响,并确定治疗设计的保存表位特征.
主要方法:
- 分析了544个NAbs和60个纳米体-RBD复杂结构,以根据结合特征定义NAb类.
- 系统地绘制NAb抗原接触的地图,以确定经常出现的热点残留物.
- 使用超过2300个经过实验确定的跨病毒菌株和血统的解离常数进行比较亲和分析.
主要成果:
- 定义了五个主要的NAb类和两个子类,其特点是绑定区域,角度,HACE2竞争和热点使用.
- 确定了91个反复出现的热点残留物,其中一些在Omicron变种中保留.
- 1-3类的NAbs由于硬质冲突导致对Omicron变体的亲和力降低,而4-5类保持了高亲和力.
- 在体内表位预测器只确定了~40%的实验定义的热点.
结论:
- 开发的拓分类为理解NAb结合多样性及其与SARS-CoV-2变体的相互作用提供了一个整合性的结构框架.
- 保存的表位特征突出了广泛的疫苗和治疗NAb设计的潜在目标.
- 结构导向的方法对于准确预测抗体表位和指导下一代治疗方法的开发至关重要.
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