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Your Position: Home > Protein > Spike RBD > SPD-C522z

SARS-CoV-2 Spike RBD Protein, His Tag (BA.2.75.2/Omicron) (MALS verified)

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  • Synonym
    Spike,S protein RBD,Spike glycoprotein Receptor-binding domain,S glycoprotein RBD,Spike protein RBD
  • Source
    SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) (SPD-C522z) is expressed from human 293 cells (HEK293). It contains AA Arg 319 - Lys 537 (Accession # QHD43416.1 (G339H, R346T, S371F, S373P, S375F, T376A, D405N, R408S, K417N, N440K, G446S, N460K, S477N, T478K, E484A, F486S, Q498R, N501Y, Y505H)). The spike mutations are identified on the SARS-CoV-2 Omicron variant (Pango lineage: BA.2.75.2).
    Predicted N-terminus: Arg 319
  • Molecular Characterization

    This protein carries a polyhistidine tag at the C-terminus

    The protein has a calculated MW of 26.6 kDa. The protein migrates as 33-37 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.

    >90% as determined by SEC-MALS.

  • Formulation

    Lyophilized from 0.22 μm filtered solution in PBS, pH7.4 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 RBD SDS-PAGE

SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) 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 RBD MALS images

The purity of SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) (Cat. No. SPD-C522z) is more than 90% and the molecular weight of this protein is around 28-38 kDa verified by SEC-MALS.

Bioactivity-ELISA
 Spike RBD ELISA

Immobilized Human ACE2, Fc Tag (Cat. No. AC2-H5257) at 5 μg/mL (100 μL/well) can bind SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) (Cat. No. SPD-C522z) with a linear range of 10-78 ng/mL (QC tested).

 Spike RBD ELISA

Immobilized SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) (Cat. No. SPD-C522z) at 1 μg/mL (100 μL/well) can bind Human ACE2, Fc Tag (Cat. No. AC2-H5257) with a linear range of 0.2-4 ng/mL (Routinely tested).

 Spike RBD ELISA

Immobilized SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) (Cat. No. SPD-C522z) at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV-2 Spike RBD Broadly Neutralizing Antibody, Human IgG1 (Cat. No. SPD-M265) with a linear range of 0.1-1 ng/mL (Routinely tested).

 Spike RBD ELISA

Immobilized SARS-CoV-2 Spike RBD, His Tag (BA.2.75.2/Omicron) (Cat. No. SPD-C522z) at 1 μg/mL (100 μL/well) can bind Anti-SARS-CoV-2 Spike RBD Antibody, Chimeric mAb, Human IgG1 (AM130) (Cat. No. S1N-M13A1) with a linear range of 0.1-2 ng/mL (Routinely tested).

  • Background
    Its been reported that coronavirus 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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