SARS-CoV-2 Nucleocapsid Antibody

Recombinant nucleoprotein of SARS-CoV (severe acute respiratory syndrome) .The nucleocapsid protein is expressed in the internal nucleocapsid of SARS-CoV-2.

This monoclonal antibody is aseptically packaged and formulated in 0.01 M phosphate buffered saline (PBS) pH 7.2 - 7.4, 150 mM NaCl with no carrier protein, potassium, calcium or preservatives added.

Functional grade preclinical antibodies may be stored sterile as received at 2-8˚ C for up to one month. For longer term storage, aseptically aliquot in working volumes without diluting and store at -80˚ C. Avoid Repeated Freeze Thaw Cycles.

Anti-SARS-CoV-2 Nucleocapsid, clone 1C7C7, specifically targets an epitope on the SARS-CoV-2 and SARS-CoV nucleocapsid protein. This antibody does not cross-react with the nucleocapsid of other common human coronaviruses, OC43 and 229E

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the causative agent of coronavirus disease 2019 (COVID-19), is an enveloped, single-stranded, positive-sense RNA virus that belongs to the Coronaviridae family 1. The SARS-CoV-2 genome, which shares 79.6% identity with SARS-CoV, encodes four essential structural proteins: the spike (S), envelope (E), membrane (M), and nucleocapsid protein (N) 2. The N protein is 46 kDa and consists of two highly conserved structural domains, the N-terminal domain (NTD) and C-terminal domain (CTD), connected by a linker region. The NTD and CTD are involved in RNA binding and self-oligomerization, respectively 3, 4. The primary function of the N protein is to bind to and package the viral RNA genome into a helical ribonucleoprotein complex 5. The N protein is also involved in other critical steps of the viral life cycle, including transcription, replication, and modulating infected cell signaling pathways 6, 7. The N protein is abundantly expressed during infection and is highly conserved, sharing 90% amino acid homology with the SARS-CoV N protein 8. It is also immunogenic, and antibodies 8,9 and memory T cells 10, 11 targeting the N protein are present in the sera of convalescent COVID-19 patients, identifying the N protein as a suitable candidate for vaccine development and diagnostic assays. Diagnostic assays based on the N protein effectively detect antibodies in the sera of patients infected with SARS-CoV-2 12. The N protein also contributes to immune evasion by antagonizing antiviral RNAi 13, suggesting its potential value as a targeted therapeutic.