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Publication Abstract from PubMed

The increasing prevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) variants with the ability to escape existing humoral protection conferred by previous infection and/or immunization necessitates the discovery of broadly reactive neutralizing antibodies (nAbs). Utilizing mRNA display, we identify a set of antibodies against SARS-CoV-2 spike (S) proteins and characterize the structures of nAbs that recognize epitopes in the S1 subunit of the S glycoprotein. These structural studies reveal distinct binding modes for several antibodies, including the targeting of rare cryptic epitopes in the receptor-binding domain (RBD) of S that interact with angiotensin-converting enzyme 2 (ACE2) to initiate infection, as well as the S1 subdomain 1. Further, we engineer a potent ACE2-blocking nAb to sustain binding to S RBD with the E484K and L452R substitutions found in multiple SARS-CoV-2 variants. We demonstrate that mRNA display is an approach for the rapid identification of nAbs that can be used in combination to combat emerging SARS-CoV-2 variants.

Rapid identification of neutralizing antibodies against SARS-CoV-2 variants by mRNA display.,Tanaka S, Olson CA, Barnes CO, Higashide W, Gonzalez M, Taft J, Richardson A, Martin-Fernandez M, Bogunovic D, Gnanapragasam PNP, Bjorkman PJ, Spilman P, Niazi K, Rabizadeh S, Soon-Shiong P Cell Rep. 2022 Feb 8;38(6):110348. doi: 10.1016/j.celrep.2022.110348. Epub 2022 , Jan 20. PMID:35114110^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.