Abstract
COVID-19, caused by SARS-CoV-2, is currently spreading around the world and causing many casualties. Antibodies against such emerging infectious diseases are one of the important tools for basic viral research and the development of diagnostic and therapeutic agents. CR3022 is a monoclonal antibody against the receptor binding domain (RBD) of the spike protein (S protein) of SARS-CoV found in SARS patients, but it was also shown to have strong affinity for that of SARS-CoV-2. In this study, we produced large amounts of three formats of CR3022 antibodies (scFv, Fab and IgG) with high purity using a silkworm-baculovirus expression vector system. Furthermore, SPR measurements showed that the affinity of those silkworm-produced IgG antibodies to S protein was almost the same as that produced in mammalian expression system. These results indicate that the silkworm-baculovirus expression system is an excellent expression system for emerging infectious diseases that require urgent demand for diagnostic agents and therapeutic agents.
Keywords: CR3022 antibody; Fab; IgG; SARS-CoV-2; Silkworm-baculovirus expression vector system; Spike protein; scFv.
【저자키워드】 SARS-CoV-2, IgG, Spike protein, CR3022 antibody, Fab, Silkworm-baculovirus expression vector system, scFv., 【초록키워드】 COVID-19, Infectious diseases, S protein, spike, antibody, SARS-CoV, monoclonal antibody, Emerging infectious diseases, diagnostic, Infectious disease, SPR, Spike protein, Receptor binding domain, IgG antibody, Viral, IgG antibodies, RBD, Research, therapeutic agents, expression, affinity, CR3022, diagnostic agents, SAME AS, SARS patients, mammalian, expression vector, scFv, produced, shown, caused, the spike protein, 【제목키워드】 Production, System, Against,