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两个纳米体的结构基础通过向超保守的表位来中和SARS-CoV-2 Omicron变体
Zengchao Sun1, Lu Wang2, Lingyun Li3
1Department of Biopharmaceutics, College of Food Science and Technology, Shanghai Ocean University, Shanghai 201306, China; State Key Laboratory of Drug Research, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
Journal of structural biology
|July 7, 2023
概括
研究人员确定了针对SARS-CoV-2受体结合域的强有力的纳米体,为抗击Omicron变种和未来的COVID-19大流行提供了有前途的战略.
科学领域:
- 结构生物学 结构生物学
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
背景情况:
- 像Omicron这样的SARS-CoV-2变种的出现需要新的治疗策略.
- 针对COVID-19的有效抗体药物供应仍然有限,这凸显了对新治疗方法的需求.
研究的目的:
- 识别和描述针对SARS-CoV-2受体结合域 (RBD) 的新型纳米体.
- 从结构上阐明这些纳米体的结合机制,并评估它们对抗SARS-CoV-2变种的中和潜力.
主要方法:
- 纳米体识别和亲和力选.
- 高性能液体色谱 (HPLC) 用于纳米体的分类.
- 用于确定三元复杂结构的X射线晶体学.
- 在体外测试以评估ACE2阻断和中和功效.
主要成果:
- 确定了对SARS-CoV-2 RBD.具有高度亲和力的纳米体 (NB1C6,NB1B5).
- 结构分析显示,在RBD的神秘部位上保留了结合表位.
- NB1B5有效地阻断了ACE2相互作用.
- 设计的多价值和双巴拉托普纳米体显示出对Omicron的高亲和力和中和力.
结论:
- NB1C6和NB1B5纳米体的目标是SARS-CoV-2 RBD上的保存,神秘的表位.
- 这些纳米体,特别是多价格格格式的纳米体,显示了中和Omicron和未来变种的巨大潜力.
- 保存的结合部位为设计针对新出现的SARS-CoV-2菌株的抗体提供了结构基础,以对抗COVID-19.
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