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Deprecated: Implicit conversion from float 233.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2021 ; 35 (1): 108950 Nephropedia Template TP
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Modular basis for potent SARS-CoV-2 neutralization by a prevalent VH1-2-derived antibody class #MMPMID33794145
Rapp M; Guo Y; Reddem ER; Yu J; Liu L; Wang P; Cerutti G; Katsamba P; Bimela JS; Bahna FA; Mannepalli SM; Zhang B; Kwong PD; Huang Y; Ho DD; Shapiro L; Sheng Z
Cell Rep 2021[Apr]; 35 (1): 108950 PMID33794145show ga
Antibodies with heavy chains that derive from the VH1-2 gene constitute some of the most potent severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-neutralizing antibodies yet identified. To provide insight into whether these genetic similarities inform common modes of recognition, we determine the structures of the SARS-CoV-2 spike in complex with three VH1-2-derived antibodies: 2-15, 2-43, and H4. All three use VH1-2-encoded motifs to recognize the receptor-binding domain (RBD), with heavy-chain N53I-enhancing binding and light-chain tyrosines recognizing F486(RBD). Despite these similarities, class members bind both RBD-up and -down conformations of the spike, with a subset of antibodies using elongated CDRH3s to recognize glycan N343 on a neighboring RBD-a quaternary interaction accommodated by an increase in RBD separation of up to 12 A. The VH1-2 antibody class, thus, uses modular recognition encoded by modular genetic elements to effect potent neutralization, with the VH-gene component specifying recognition of RBD and the CDRH3 component specifying quaternary interactions.