Anti-SARS-CoV-2 Nucleocapsid (N) (Clone NP1-E9) – Biotin

SARS-CoV-2 Nucleocapsid (N) Protein

This Biotinylated antibody is formulated in 0.01 M phosphate buffered saline (150 mM NaCl) PBS pH 7.4, 1% BSA and 0.09% sodium azide as a preservative.

This biotinylated antibody is stable when stored at 2-8°C. Do not freeze.

Ships Overnight on Blue Ice

Anti-SARS-CoV-2 Nucleocapsid, clone NP1-E9, specifically targets an epitope on the SARS-CoV-2 nucleocapsid protein. Futhermore, it is reported to bind to the oligomerization domain of the N protein.

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.

The nucleocapsid protein is expressed in the internal nucleocapsid of SARS-CoV-2.

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