Ultrapotent human antibodies protect against SARS-CoV-2 challenge via multiple mechanisms

M. Alejandra Tortorici, Martina Beltramello, Florian A. Lempp, Dora Pinto, Ha V. Dang, Laura E. Rosen, Matthew McCallum, John Bowen, Andrea Minola, Stefano Jaconi, Fabrizia Zatta, Anna De Marco, Barbara Guarino, Siro Bianchi, Elvin J. Lauron, Heather Tucker, Jiayi Zhou, Alessia Peter, Colin Havenar-Daughton, Jason A. WojcechowskyjJames Brett Case, Rita E. Chen, Hannah Kaiser, Martin Montiel-Ruiz, Marcel Meury, Nadine Czudnochowski, Roberto Spreafico, Josh Dillen, Cindy Ng, Nicole Sprugasci, Katja Culap, Fabio Benigni, Rana Abdelnabi, Shi Yan Caroline Foo, Michael A. Schmid, Elisabetta Cameroni, Agostino Riva, Arianna Gabrieli, Massimo Galli, Matteo S. Pizzuto, Johan Neyts, Michael S. Diamond, Herbert W. Virgin, Gyorgy Snell, Davide Corti, Katja Fink, David Veesler

Research output: Contribution to journalArticlepeer-review

350 Scopus citations


Efficient therapeutic options are needed to control the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that has caused more than 922,000 fatalities as of 13 September 2020. We report the isolation and characterization of two ultrapotent SARS-CoV-2 human neutralizing antibodies (S2E12 and S2M11) that protect hamsters against SARS-CoV-2 challenge. Cryo-electron microscopy structures show that S2E12 and S2M11 competitively block angiotensin-converting enzyme 2 (ACE2) attachment and that S2M11 also locks the spike in a closed conformation by recognition of a quaternary epitope spanning two adjacent receptor-binding domains. Antibody cocktails that include S2M11, S2E12, or the previously identified S309 antibody broadly neutralize a panel of circulating SARS-CoV-2 isolates and activate effector functions. Our results pave the way to implement antibody cocktails for prophylaxis or therapy, circumventing or limiting the emergence of viral escape mutants.

Original languageEnglish
Pages (from-to)950-957
Number of pages8
Issue number6519
StatePublished - Nov 20 2020


Dive into the research topics of 'Ultrapotent human antibodies protect against SARS-CoV-2 challenge via multiple mechanisms'. Together they form a unique fingerprint.

Cite this