The present disclosure provides antigen-binding proteins, such as fully human antibodies, that specifically bind the spike (S) protein of the SARS-CoV-2 coronavirus and uses thereof. In various embodiments, the anti-spike protein antibodies are neutralizing antibodies that prevent binding of the SARS-CoV-2 coronavirus to a target cell expressing the ACE2 protein. Included are anti-spike protein antibodies, antibody fragments, and single-chain antibodies, as well as pharmaceutical compositions that include such antibodies and antibody fragments. Also provided herein are nucleic acids and recombinant expression vectors that encode the anti-spike protein antibodies and antibody fragments disclosed herein and transgenic cells transected with such nucleic acids and expression vectors. Further provided are methods for preparing and using such anti-spike protein antibodies. Methods for using the anti-spike protein antibodies include methods of treating or preventing infection with a coronavirus, such as the SARS-CoV-2 coronavirus, by administering an antibody or antibody fragment as disclosed herein.

Provided are a coronavirus spike (S) protein-specific antibody and use thereof.

The present disclosure provides fully human antibodies that specifically bind the spike (S) protein of the SARS-CoV-2 coronavirus with high affinity, or antigen-binding proteins derived from such antibodies, and uses thereof. Included are anti-spike protein antibodies, antibody fragments, and single-chain antibodies, that are coronavirus neutralizing antibodies, as well as pharmaceutical compositions that include such antibodies and antibody fragments. Methods for using the anti-spike protein antibodies include methods of treating or preventing infection with a coronavirus, such as the SARS-CoV-2 coronavirus, by administering an antibody or antibody fragment as disclosed herein, including by intranasal delivery. Methods and compositions for treating or preventing coronavirus infection by administering a composition that includes a nucleic acid construct that encodes a neutralizing antibody are also provided.

The subject matter described herein relates to potent monoclonal and bispecific antibodies capable of neutralizing a SARS-CoV-2 viruses and methods of generating the antibodies.

Disclosed herein is a kit for detecting or quantifying a SARS-CoV-2 nucleocapsid phosphoprotein, including a first antibody, wherein a variable heavy chain domain comprises the amino acid sequence selected from the group consisting of SEQ ID NOs: 1, 3, 5, 7, 11, 13, 15, 17, 19, and 21, and a variable light chain domain comprises the amino acid sequence selected from the group consisting of SEQ ID NOs: 2, 4, 6, 8, 12, 14, 16, 18, 20, and 22; and a second antibody, wherein a variable heavy chain domain comprises the amino acid sequence selected from the group consisting of SEQ ID NOs: 9 and 13, and a variable light chain domain comprises the amino acid sequence selected from the group consisting of SEQ ID NOs: 10 and 14.

Aspects of the present disclosure relate to methods and systems designed to utilize antibodies and viral inactivating/lysis agents to detect SARS-CoV-2 on a microfluidic channel-based platform, for example in samples obtained from nasal swabs taken from infected individuals. The rapid and accurate point of care COVID-19 diagnostic tests that are disclosed herein can transform medical professional's testing capabilities, and in this way improve the ability to control the COVID-19 pandemic.

To address the need in the art, the inventors have comprehensively characterized the SARS-CoV-2-specific B cell repertoire in convalescent COVID-19 patients and generated mAbs against the spike, ORF8, and NP proteins. Together, the inventors' data reveal key insight into antigen specificity and B cell subset distribution upon SARS-CoV-2 infection in the context of age, sex, and disease severity. Aspects of the disclosure relate to novel antibody and antigen binding fragments. Further aspects relate to polypeptides comprising the antigen binding fragment(s) of the disclosure, and compositions comprising the polypeptides, antibodies, and/or antigen binding fragments of the disclosure. Also described are nucleic acids encoding an antibody or antigen binding fragment of the disclosure.

The present invention includes antibodies and antigen-binding fragments thereof that specifically bind a SARS-CoV-2 antigen and are in certain embodiments capable of neutralizing a SARS-CoV-2 infection. Polynucleotides encoding an antibody or an antigen-binding fragment, vectors and host cells that comprise a polynucleotide and pharmaceutical compositions are also included in this invention. Also described herein are methods of using the presently disclosed antibodies, antigen-binding fragments, polynucleotides, vectors, host cells, and compositions to diagnose, prevent or treat a SARS-CoV-2 infection.

The present technology relates to cell-free systems, methods, and kits for expressing proteins in vitro and evaluating the expressed proteins. In particular, the technology relates to cell-free systems, methods, and kits for expressing antibodies, antigen-binding fragment thereof, and antibody derivatives in vitro and evaluating the expressed antibodies, antigen-binding fragment thereof, and antibody derivatives.

Described herein are antibodies or variants thereof that specifically bind to coronavirus antigens, such as SARS-CoV-2 antigens. The antibodies can be neutralizing antibodies. Also provided are methods of using the antibodies, including methods of treating a subject infected with SARS-CoV-2, and methods of diagnosing a subject infected with SARS-CoV-2.