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Deprecated: Implicit conversion from float 263.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell 2020 ; 181 (5): 1004-1015.e15 Nephropedia Template TP
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Structural Basis for Potent Neutralization of Betacoronaviruses by Single-Domain Camelid Antibodies #MMPMID32375025
Wrapp D; De Vlieger D; Corbett KS; Torres GM; Wang N; Van Breedam W; Roose K; van Schie L; Hoffmann M; Pohlmann S; Graham BS; Callewaert N; Schepens B; Saelens X; McLellan JS
Cell 2020[May]; 181 (5): 1004-1015.e15 PMID32375025show ga
Coronaviruses make use of a large envelope protein called spike (S) to engage host cell receptors and catalyze membrane fusion. Because of the vital role that these S proteins play, they represent a vulnerable target for the development of therapeutics. Here, we describe the isolation of single-domain antibodies (VHHs) from a llama immunized with prefusion-stabilized coronavirus spikes. These VHHs neutralize MERS-CoV or SARS-CoV-1 S pseudotyped viruses, respectively. Crystal structures of these VHHs bound to their respective viral targets reveal two distinct epitopes, but both VHHs interfere with receptor binding. We also show cross-reactivity between the SARS-CoV-1 S-directed VHH and SARS-CoV-2 S and demonstrate that this cross-reactive VHH neutralizes SARS-CoV-2 S pseudotyped viruses as a bivalent human IgG Fc-fusion. These data provide a molecular basis for the neutralization of pathogenic betacoronaviruses by VHHs and suggest that these molecules may serve as useful therapeutics during coronavirus outbreaks.