Recombinant SARS-CoV-2 ORF8 His Protein

Name: Recombinant SARS-CoV-2 ORF8 His Protein
Brand: Novus Biologicals
SKU: NBP3-07089

Novus Biologicals, part of Bio-Techne | Catalog # NBP3-07089

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Product Specifications
Scientific Data
Preparation & Storage
Background
Product Documents
Specific Notices

Key Product Details

Tag

His

Conjugate

Unconjugated

Applications

ELISA, SDS-PAGE, Western Blot

View all SARS-CoV-2 ORF8 Proteins and Enzymes »

Product Specifications

Description

A recombinant protein with a His tag corresponding to the amino acids 16-121 aa of SARS-CoV-2 ORF8

Source: E.coli

Accession: QHD43422.1

Purity

>80% SDS-PAGE

Predicted Molecular Mass

13.4 kDa.
Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors.

Protein / Peptide Type

Recombinant Protein

Scientific Data Images for Recombinant SARS-CoV-2 ORF8 His Protein

SDS-PAGE: Recombinant SARS-CoV-2 ORF8 His Protein [NBP3-07089]

SDS-Page: Recombinant SARS-CoV-2 ORF8 His Protein [NBP3-07089] - SARS-CoV-2 ORF8 Recombinant Protein, His Tag on SDS-PAGE under reducing (R) condition. The gel was stained overnight with Coomassie Blue. The purity of the protein is greater than 80%.

Formulation, Preparation and Storage

NBP3-07089

Formulation	PBS, pH 7.4
Preservative	No Preservative
Concentration	Please see the vial label for concentration. If unlisted please contact technical services.
Shipping	The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage	Store at -20 degrees C. Avoid freeze/thaw cycles.

Background: SARS-CoV-2 ORF8

SARS-CoV-2 Open Reading Frame 8 (ORF8) is one of the nine downstream accessory protein open reading frames of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the causative agent of COVID-19 (1). SARS-CoV-2 ORF8 is 121 amino acids (aa) in length with a theoretical molecular weight of 13.8 kDa (2, 3). One particular difference between SARS-CoV-2 and SARS-CoV is that SARS-CoV-2 has one ORF8 protein, while SARS-CoV has two ORF8 proteins (ORF8a and ORF8b) (3). The aa sequence alignment of SARS-CoV-2's ORF8 has 31.7% sequence identity and 70.7% sequence similarity with SARS-CoV ORF8a (3). Furthermore, SARS-CoV-2 ORF8 has a 40.5% sequence identity and 66.7% sequence similarity is with SARS-CoV ORF8b (3). Despite this low sequence identity and similarity, the ORF8 structure and function appears to be well conserved (4). Both ORF8 proteins appear to be localized to the ER and have an N-terminal hydrophobic region, a conserved glycosylation site, and cysteine residues capable of forming disulfide bonds (4).

Studies have revealed that SARS-CoV-2 ORF8 has a role in host immune suppression during viral infection as it is an inhibitor of the type I interferon pathway (4, 5). Specifically, ORF8 has been shown to have antagonistic properties on interferon-beta (IFN-beta), the NF-kappabeta-responsive promoter, and the interferon-stimulated response element (ISRE) (4,5). Additionally, ORF8 colocalizes with the ER and lysosomal proteins Calnexin and LAMP1, playing a role in major histocompatibility complex class I (MHC-I) downregulation and degradation (4, 6). These results suggest that inhibiting ORF8 may be a potential approach for improving immune surveillance and more quickly eliminating SARS-CoV-2 infection (4-6).

References

1. Michel, C. J., Mayenr, C., Poch, O., & Thompson, J. D. (2020). Characterization of accessory genes in coronavirus genomes. Virology journal. https://doi.org/10.1186/s12985-020-01402-1

2. UniProt (P0DTC8)

3. Yoshimoto F. K. (2020). The Proteins of Severe Acute Respiratory Syndrome Coronavirus-2 (SARS CoV-2 or n-COV19), the Cause of COVID-19. The protein journal. https://doi.org/10.1007/s10930-020-09901-4

4. Mohammad, S., Bouchama, A., Mohammad Alharbi, B., Rashid, M., Saleem Khatlani, T., Gaber, N. S., & Malik, S. S. (2020). SARS-CoV-2 ORF8 and SARS-CoV ORF8ab: Genomic Divergence and Functional Convergence. Pathogens (Basel, Switzerland). https://doi.org/10.3390/pathogens9090677

5. Li, J. Y., Liao, C. H., Wang, Q., Tan, Y. J., Luo, R., Qiu, Y., & Ge, X. Y. (2020). The ORF6, ORF8 and nucleocapsid proteins of SARS-CoV-2 inhibit type I interferon signaling pathway. Virus research. https://doi.org/10.1016/j.virusres.2020.198074

6. Zhang Y., Zhang J., Chen Y., Luo B., Yuan Y., Huang F., Yang T., Yu F., Liu J., Liu B., et al. (2020). The ORF8 Protein of SARS-CoV-2 Mediates Immune Evasion through Potently Downregulating MHC-I. bioRxiv. https://doi.org/10.1101/2020.05.24.111823.

Alternate Names

2019-nCoV ORF8, 2019-nCoV ORF8 Protein, COVID-19 Non-structural protein 8, COVID-19 ns8, COVID-19 ORF8, Human coronavirus ORF8 Protein, Non-structural protein 8, ns8, ORF8 protein, SARS-CoV-2, SARS-CoV-2 Non-structural protein 8, SARS-CoV-2 ns8, SARSCoV2 ORF8 Protein, SARS-CoV-2 ORF8 Protein, Severe Acute Respiratory Syndrome Coronavirus 2 ORF8 Protein

Gene Symbol

ORF8

Additional SARS-CoV-2 ORF8 Products

Product Documents for Recombinant SARS-CoV-2 ORF8 His Protein

Product Datasheets

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COA

Product Specific Notices for Recombinant SARS-CoV-2 ORF8 His Protein

This product is for research use only and is not approved for use in humans or in clinical diagnosis. This product is guaranteed for 1 year from date of receipt.

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