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Your Position: ホーム > Protein > Spike protein > SPN-C5226

SARS-CoV-2 Spike Trimer Protein, His Tag (XD/BA.1 x AY.4 recombinant) (MALS verified)

  • Synonym
    Spike,S protein,Spike glycoprotein,S glycoprotein
  • Source
    SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (SPN-C5226) is expressed from human 293 cells (HEK293). It contains AA Val 16 - Pro 1213 (Accession # QHD43416.1 (T19R, A27S, T95I, G142D, EFR156G, NL211I, INS214EPE, G339D, S371L, S373P, S375F, K417N, N440K, G446S, S477N, T478K, E484A, Q493R, G496S, Q498R, N501Y, Y505H, T547K, D614G, H655Y, N679K, P681H, N764K, D796Y, N856K, Q954H, N969K, L981F, R683A, R685A, F817P, A892P, A899P, A942P, K986P, V987P)). The spike mutations are predicted as the SARS-CoV-2 variant (Pango lineage: XD). The recombinant protein is expressed from human 293 cells (HEK293) with T4 fibritin trimerization motif and a polyhistidine tag at the C-terminus. Proline substitutions (F817P, A892P, A899P, A942P, K986P, V987P) and alanine substitutions (R683A and R685A) are introduced to stabilize the trimeric prefusion state of SARS-CoV-2 S protein and abolish the furin cleavage site, respectively.
    Predicted N-terminus: Val 16
  • Molecular Characterization

    This protein carries a polyhistidine tag at the C-terminus

    The protein has a calculated MW of 138.5 kDa. The protein migrates as 160-190 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

  • Endotoxin
    Less than 1.0 EU per μg by the LAL method.
  • Purity

    >95% as determined by SDS-PAGE.

    >95% as determined by SEC-MALS.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS with trehalose as protectant.

    Contact us for customized product form or formulation.

  • Reconstitution

    Please see Certificate of Analysis for specific instructions.

    For best performance, we strongly recommend you to follow the reconstitution protocol provided in the CoA.

  • Storage

    For long term storage, the product should be stored at lyophilized state at -20°C or lower.

    Please avoid repeated freeze-thaw cycles.

    This product is stable after storage at:

    1. -20°C to -70°C for 12 months in lyophilized state;
    2. -70°C for 3 months under sterile conditions after reconstitution.
SDS-PAGE
Spike protein SDS-PAGE

SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) on SDS-PAGE under reducing (R) condition. The gel was stained with Coomassie Blue. The purity of the protein is greater than 95%.

SEC-MALS
Spike protein MALS images

The purity of SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (Cat. No. SPN-C5226) is more than 95% and the molecular weight of this protein is around 551-608 kDa verified by SEC-MALS.

Bioactivity-ELISA
 Spike protein ELISA

Immobilized SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (Cat. No. SPN-C5226) at 1 μg/mL (100 μL/well) can bind Human ACE2, Fc Tag (Cat. No. AC2-H5257) with a linear range of 0.4-25 ng/mL (QC tested).

 Spike protein ELISA

Immobilized SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (Cat. No. SPN-C5226) at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV-2 Spike RBD Antibody, Chimeric mAb, Human IgG1 (Cat. No. S1N-M122) with a linear range of 0.1-3 ng/mL (Routinely tested).

 Spike protein ELISA

Immobilized Human ACE2, Fc Tag (Cat. No. AC2-H5257) at 5 μg/mL (100 μL/well) can bind SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (Cat. No. SPN-C5226) with a linear range of 0.1-13 ng/mL (Routinely tested).

 Spike protein ELISA

Serial dilutions of Anti-SARS-CoV-2 Spike RBD Broadly Neutralizing Antibody, Human IgG1 (Cat. No. SPD-M265) were added into Human ACE2, Fc Tag (Cat. No. AC2-H5257) : SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (Cat. No. SPN-C5226) binding reactions. The half maximal inhibitory concentration (IC50) is 0.1198 μg/mL (Routinely tested).

 Spike protein ELISA

Serial dilutions of Anti-SARS-CoV-2 Spike RBD Antibody, Mouse IgG1 (Omicron Specific) (Cat. No. SPD-M305) were added into Human ACE2, Fc Tag (Cat. No. AC2-H5257) : SARS-CoV-2 Spike Trimer, His Tag (XD/BA.1 x AY.4 recombinant) (Cat. No. SPN-C5226) binding reactions. The half maximal inhibitory concentration (IC50) is 3.646 μg/mL (Routinely tested).

  • Background
    It's been reported that SARS-CoV-2 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.
  • Clinical and Translational Updates

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