SARS-CoV-2 Nucleocapsid Protein, Human (His)

The SARS-CoV-2 nucleocapsid protein plays a crucial role in assembling the virion, forming the helical ribonucleocapsid (RNP), and interacting with the viral genome and membrane protein M. In addition to its structural function, it also enhances subgenomic viral RNA transcription and overall replication. SARS-CoV-2 Nucleocapsid Protein, Human (His) is the recombinant human-derived SARS-CoV-2 Nucleocapsid protein, expressed by E. coli , with N-6*His labeled tag. The total length of SARS-CoV-2 Nucleocapsid Protein, Human (His) is 419 a.a., with molecular weight of ~48 kDa.

The SARS-CoV-2 Nucleocapsid Protein assumes a pivotal role in virion assembly, orchestrating the packaging of the positive-strand viral genome RNA into a helical ribonucleocapsid (RNP) and establishing crucial interactions with the viral genome and membrane protein M. Beyond its structural functions, this protein significantly contributes to the efficiency of subgenomic viral RNA transcription and overall viral replication. Notably, it exhibits an additional role in modulating host chemokine function, a mechanism that may favor viral replication and transmission. The Nucleocapsid Protein achieves this modulation by being secreted into the extracellular space, where it competes with host chemokines for binding to host glycosaminoglycans (GAG), thus potentially disrupting host defense mechanisms and supporting the viral life cycle.

1.Measured by its binding ability in a functional ELISA. Immobilized SARS-CoV-2-N at 2 μg/mL can bind SARS-CoV-2-N Antibody and the EC₅₀ is 0.9081 -8.795 ng/mL.
2.Immobilized SARS-CoV-2 Nucleocapsid protein, His Tag at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV- 2 Nucleocapsid Antibody. The ED₅₀ for this effect is 5.118 ng/mL.

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  Immobilized SARS-CoV-2 Nucleocapsid protein, His Tag at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV-2 Nucleocapsid Antibody. The ED₅₀ for this effect is 5.118 ng/mL.

Human

E. coli

N-6*His

P0DTC9 (M1-A419)

43740575  [NCBI]

MSDNGPQNQRNAPRITFGGPSDSTGSNQNGERSGARSKQRRPQGLPNNTASWFTALTQHGKEDLKFPRGQGVPINTNSSPDDQIGYYRRATRRIRGGDGKMKDLSPRWYFYYLGTGPEAGLPYGANKDGIIWVATEGALNTPKDHIGTRNPANNAAIVLQLPQGTTLPKGFYAEGSRGGSQASSRSSSRSRNSSRNSTPGSSRGTSPARMAGNGGDAALALLLLDRLNQLESKMSGKGQQQQGQTVTKKSAAEASKKPRQKRTATKAYNVTQAFGRRGPEQTQGNFGDQELIRQGTDYKHWPQIAQFAPSASAFFGMSRIGMEVTPSGTWLTYTAAIKLDDKDPNFKDQVILLNKHIDAYKTFPPTEPKKDKKKKADETQALPQRQKKQQTVTLLPAADLDDFSKQLQQSMSSADSTQA

Approximately 48-50 kDa

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  Greater than 90% as determined by reducing SDS-PAGE.

Lyophilized powder

Lyophilized from a 0.2 μm solution of 20 mM Tris-HC1, 0.5 M NaCl, 6% Trehalose, pH 8.0 or 50 mM Tris-HCL, 300 mM NaCl, pH 8.0.

<1 EU/μg, determined by LAL method.

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH₂O.

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Room temperature in continental US; may vary elsewhere.