SARS-CoV-2 (2019-nCoV) Spike S1-Fc Recombinant Protein

COVID-19 Spike S1 Research.
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SARS-CoV-2 (2019-nCoV) Spike S1-Fc Recombinant Protein: Product Information

Purity
> 90 % as determined by SDS-PAGE.
Endotoxin
< 1.0 EU per μg protein as determined by the LAL method.
Activity
Measured by its binding ability in a functional ELISA.
Immobilized human ACE2 protein (His tag) at 2μg/mL (100μL/well) can bind SARS-CoV-2 (2019-nCoV) Spike Protein (S1 Subunit, Fc Tag)(40591-V02H), the EC50 of SARS-CoV-2 (2019-nCoV) Spike Protein (S1 Subunit, Fc Tag) is 10-50 ng/mL.
Protein Construction
A DNA sequence encoding the SARS-CoV-2 (2019-nCoV) spike protein S1 Subunit (YP_009724390.1) (Val16-Arg685) was expressed with the Fc region of human IgG1 at the C-terminus.
Accession#
Expressed Host
HEK293 Cells
Species
SARS-CoV-2
Predicted N Terminal
Val16
Molecule Mass
The recombinant SARS-CoV-2 (2019-nCoV) Spike Protein (S1 Subunit, Fc Tag) consists of 908 amino acids and predicts a molecular mass of 101.7 kDa.
Formulation
Lyophilized from sterile PBS, pH 7.4.
Please contact us for any concerns or special requirements.
Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween80 are added as protectants before lyophilization.
Please refer to the specific buffer information in the hard copy of CoA.
Shipping
In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Stability & Storage
Samples are stable for up to twelve months from date of receipt at -20℃ to -80℃
Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution
A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.

SARS-CoV-2 (2019-nCoV) Spike S1-Fc Recombinant Protein: Images

Measured by its binding ability in a functional ELISA. Immobilized human ACE2 protein (His tag) at 2μg/mL (100μL/well) can bind SARS-CoV-2 (2019-nCoV) Spike Protein (S1 Subunit, Fc Tag)(40591-V02H), the EC50 of SARS-CoV-2 (2019-nCoV) Spike Protein (S1 Subunit, Fc Tag) is 10-50 ng/mL.

Coronavirus spike Background Information

The spike (S) glycoprotein of coronaviruses contains protrusions that will only bind to certain receptors on the host cell. Known receptors bind S1 are ACE2, angiotensin-converting enzyme 2; DPP4, dipeptidyl peptidase-4; APN, aminopeptidase N; CEACAM, carcinoembryonic antigen-related cell adhesion molecule 1; Sia, sialic acid; O-ac Sia, O-acetylated sialic acid. The spike is essential for both host specificity and viral infectivity. The term 'peplomer' is typically used to refer to a grouping of heterologous proteins on the virus surface that function together. The spike (S) glycoprotein of coronaviruses is known to be essential in the binding of the virus to the host cell at the advent of the infection process. It's been reported that SARS-CoV-2 (COVID-19 coronavirus, 2019-nCoV) can infect the human respiratory epithelial cells through interaction with the human ACE2 receptor. The spike protein is a large type I transmembrane protein containing two subunits, S1 and S2. S1 mainly contains a receptor binding domain (RBD), which is responsible for recognizing the cell surface receptor. S2 contains basic elements needed for the membrane fusion. The S protein plays key parts in the induction of neutralizing-antibody and T-cell responses, as well as protective immunity. The main functions for the Spike protein are summarized as: Mediate receptor binding and membrane fusion; Defines the range of the hosts and specificity of the virus; Main component to bind with the neutralizing antibody; Key target for vaccine design; Can be transmitted between different hosts through gene recombination or mutation of the receptor binding domain (RBD), leading to a higher mortality rate.
References
  • Shen S, et al. (2007) Expression, glycosylation, and modification of the spike (S) glycoprotein of SARS CoV. Methods Mol Biol. 379: 127-35.
  • Du L, et al. (2009) The spike protein of SARS-CoV--a target for vaccine and therapeutic development. Nat Rev Microbiol. 7 (3): 226-36.
  • Xiao X, et al. (2004) The SARS-CoV S glycoprotein. Cell Mol Life Sci. 61 (19-20): 2428-30.

SARS-CoV-2 Coronavirus spike Proteins

  • Analysis of SARS-CoV-2 Antibodies in COVID-19 Convalescent Blood using a Coronavirus Antigen Microarray
    Author
    De Assis, RR;Jain, A;Nakajima, R;Jasinskas, A;
    Year
    2020
    Journal
    BioRxiv
  • Analysis of Serologic Cross-Reactivity Between Common Human Coronaviruses and SARS-CoV-2 Using Coronavirus Antigen Microarray
    Author
    Khan, S;Nakajima, R;Jain, A;De Assis, RR;Jasinskas, A;
    Year
    2020
    Journal
    BioRxiv
  • Functional and Genetic Analysis of Viral Receptor ACE2 Orthologs Reveals a Broad Potential Host Range of SARS-CoV-2
    Author
    Liu, Y;Hu, G;Wang, Y;Zhao, X;Ji, F;Ren, W;Gong, M;
    Year
    2020
    Journal
    bioRxiv
    Application
    FACS
  • Alveolar macrophage dysfunction and cytokine storm in the pathogenesis of two severe COVID-19 patients
    Author
    Wang, C;Xie, J;Zhao, L;Fei, X;Zhang, H;Tan, Y;Nie, X;Zhou, L;Liu, Z;Ren, Y;Yuan, L;Zhang, Y;Zhang, J;Liang, L;Chen, X;Liu, X;Wang, P;Han, X;Weng, X;Chen, Y;Yu, T;Zhang, X;Cai, J;Chen, R;Shi, Z;Bian, X;
    Year
    2020
    Journal
    EBioMedicine
    Application
    labeling cells
  • The structure-activity relationship of the interactions of SARS-CoV-2 spike glycoproteins with glucuronomannan and sulfated galactofucan from Saccharina japonica
    Author
    Jin, W;Zhang, W;Mitra, D;McCandless, MG;Sharma, P;Tandon, R;Zhang, F;Linhardt, RJ;
    Year
    2020
    Journal
    International journal of biological macromolecules
    Application
    SPR
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