Structural Study of SARS-CoV-2 Antibodies Identifies a Broad-Spectrum Antibody That Neutralizes the Omicron Variant by Disassembling the Spike Trimer

作者：Wuqiang Zhan, Xiaolong Tian, Xiang Zhang, Shenghui Xing, Wenping Song, Qianying Liu, Aihua Hao, Yuxia Hu, Meng Zhang, Tianlei Ying, Zhenguo Chen, Fei Lan, Lei Sun · 发表于：Journal of Virology · 年份：2022 · DOI：10.1128/jvi.00480-22 · 被引用次数：33 · 研究领域：SARS-CoV-2 and COVID-19 Research、Bacillus and Francisella bacterial research、Viral gastroenteritis research and epidemiology

The emergence of the Omicron strain of SARS-CoV-2 caused higher immune escape, raising unprecedented concerns about the effectiveness of antibody therapies and vaccines. In this study, we identified a SARS-CoV-2 neutralizing antibody, 553-49, which neutralizes all variants by targeting a completely conserved novel epitope. In addition, we revealed that IgG 553-15 neutralizes SARS-CoV-2 by cross-linking virions and that 553-60 functions by blocking receptor binding. Comparison of different receptor binding domain (RBD) epitopes revealed that the 553-49 epitope is hidden in the S trimer and keeps a high degree of conservation during SARS-CoV-2 evolution, making 553-49 a promising therapeutic reagent against the emerging Omicron and future variants of SARS-CoV-2.