Journal: bioRxiv
Article Title: Optimizing a Human Monoclonal Antibody for Better Neutralization of SARS-CoV-2
doi: 10.1101/2024.12.04.626800
Figure Lengend Snippet: A. Top view of the RBD inner face in complex with the 19-77 antibody. 19-77 heavy chain and light chain are shown in marine and light blue, respectively. The residues in the RBD are colored by the sequence entropy in circulating SARS-CoV-2 variants. The blue and cyan boundaries show the footprints of 19-77 and human ACE2 (hACE2), respectively. B. Structure modeling of how A475V on the RBD affects 19-77 neutralization. The clashes are shown as red plates. C-E . Comparison of residues 455 and 456 on RBD and P100 HC in D614G ( C ), EG.5.1 ( D ) and HK.3 ( E ) structures. The van der Waals clashes are shown as green plates.
Article Snippet: To make human ACE2-Fc (hACE2) protein, pcDNA3-sACE2-WT(732)-IgG1 (Addgene plasmid #154104, gift of Erik Procko) plasmid was transfected into Expi293 cells using 1 mg/mL polyethyleneimine (PEI) at a ratio of 1:3, and the supernatants were collected after five days. hACE2 was purified from the cell supernatant by using rProtein A Sepharose (GE).
Techniques: Sequencing, Neutralization, Comparison