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Discovery and characterization of a pan-betacoronavirus S2-binding antibody
Structure ( IF 4.4 ) Pub Date : 2024-09-25 , DOI: 10.1016/j.str.2024.08.022
Nicole V. Johnson, Steven C. Wall, Kevin J. Kramer, Clinton M. Holt, Sivakumar Periasamy, Simone I. Richardson, Nelia P. Manamela, Naveenchandra Suryadevara, Emanuele Andreano, Ida Paciello, Giulio Pierleoni, Giulia Piccini, Ying Huang, Pan Ge, James D. Allen, Naoko Uno, Andrea R. Shiakolas, Kelsey A. Pilewski, Rachel S. Nargi, Rachel E. Sutton, Alexandria A. Abu-Shmais, Robert Parks, Barton F. Haynes, Robert H. Carnahan, James E. Crowe Jr., Emanuele Montomoli, Rino Rappuoli, Alexander Bukreyev, Ted M. Ross, Giuseppe A. Sautto, Jason S. McLellan, Ivelin S. Georgiev

The continued emergence of deadly human coronaviruses from animal reservoirs highlights the need for pan-coronavirus interventions for effective pandemic preparedness. Here, using linking B cell receptor to antigen specificity through sequencing (LIBRA-seq), we report a panel of 50 coronavirus antibodies isolated from human B cells. Of these, 54043-5 was shown to bind the S2 subunit of spike proteins from alpha-, beta-, and deltacoronaviruses. A cryoelectron microscopy (cryo-EM) structure of 54043-5 bound to the prefusion S2 subunit of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike defined an epitope at the apex of S2 that is highly conserved among betacoronaviruses. Although non-neutralizing, 54043-5 induced Fc-dependent antiviral responses in vitro, including antibody-dependent cellular cytotoxicity (ADCC) and antibody-dependent cellular phagocytosis (ADCP). In murine SARS-CoV-2 challenge studies, protection against disease was observed after introduction of Leu234Ala, Leu235Ala, and Pro329Gly (LALA-PG) substitutions in the Fc region of 54043-5. Together, these data provide new insights into the protective mechanisms of non-neutralizing antibodies and define a broadly conserved epitope within the S2 subunit.

中文翻译:


泛 β 冠状病毒 S2 结合抗体的发现和表征



从动物宿主中不断出现致命的人类冠状病毒,凸显了采取泛冠状病毒干预措施以有效防范大流行病的必要性。在这里,使用通过测序将 B 细胞受体与抗原特异性联系起来 (LIBRA-seq),我们报告了一组从人 B 细胞中分离的 50 种冠状病毒抗体。其中,54043-5 被证明可结合 α-、β-和 delta 冠状病毒的刺突蛋白的 S2 亚基。54043-5 的冷冻电子显微镜 (cryo-EM) 结构与严重急性呼吸系统综合症冠状病毒 2 (SARS-CoV-2) 刺突的融合前 S2 亚基结合,在 S2 的顶端定义了一个表位,该表位在 β 冠状病毒中高度保守。虽然是非中和的,但 54043-5 在 体外诱导了 Fc 依赖性抗病毒反应,包括抗体依赖性细胞毒性 (ADCC) 和抗体依赖性细胞吞噬作用 (ADCP)。在小鼠 SARS-CoV-2 攻击研究中,在 54043-5 的 Fc 区域引入 Leu234Ala、Leu235Ala 和 Pro329Gly (LALA-PG) 替换后观察到对疾病的保护作用。总之,这些数据为非中和抗体的保护机制提供了新的见解,并定义了 S2 亚基内广泛保守的表位。
更新日期:2024-09-25
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