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Home > Proteins & Peptides > A-Z Proteins  > Biotinylated Recombinant SARS-CoV-2 Spike RBD

Biotinylated Recombinant SARS-CoV-2 Spike RBD

COVID-19 Virus Spike RBD, 2019-nCoV S1 RBD, Receptor-Binding Domain

Catalog No. Product Name Size List Price (US$) Quantity
BP003051 Biotinylated Recombinant SARS-CoV-2 Spike RBD-His-Avi 50 ug 380.00
BP003051 Biotinylated Recombinant SARS-CoV-2 Spike RBD-His-Avi 400 ug 2400.00
BP003063 Biotinylated Recombinant SARS-CoV-2 Spike RBD-Fc-Avi 50 ug 380.00
BP003063 Biotinylated Recombinant SARS-CoV-2 Spike RBD-Fc-Avi 400 ug 2400.00
Description

BP003051: Biotinylated Recombinant SARS-CoV-2 Spike RBD-His-Avi (S1 RBD)

Source: recombinant SARS-CoV-2 Spike RBD (S1 RBD, Arg319-Asn532) was expressed in mammalian cells with a His tag and Avi at the C-terminus.
Accession: QHD43416.1
Predicted molecular mass: 27 kDa. Due to glycosylation, the biotinylated recombinant SARS-CoV-2 S1 RBD migrates to 36-40 kDa based on the Bis-Tris PAGE result.
Endotoxin: Less than 1 EU per ug by the LAL method.
Activity: Immobilized biotinylated recombinant SARS-CoV-2 Spike RBD-His-Avi protein at 1 ug/ml (100 ul/well). Dose response curve for the recombinant human ACE2-Fc fusion protein with the EC50 of 100 ng/ml determined by ELISA.
Formulation: The biotinylated recombinant SARS-CoV-2 Spike RBD-His-Avi was lyophilized from 0.22 um filtered solution in 20 mM PB (pH 7.4). Normally 5% trehalose is added as protectant before lyophilization.
Purity: > 95% by PAGE under reduced condition, and SEC-HPLC.

Shipping: The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:
Use a manual defrost freezer and avoid repeated freeze-thaw cycles.
12 months from date of receipt, -20 to -70°C as supplied.
1 month, 2 to 8°C under sterile conditions after reconstitution.
3 months, -20 to -70°C under sterile conditions after reconstitution.

Background

The receptor binding domain (RBD) in the S1 subunit, or called S1 RBD, of the SARS-CoV-2 spike (S) glycoprotein plays the most important roles in viral attachment, fusion and entry, and serves as a target for development of virus entry inhibitors, neutralizing antibodies, and vaccines. There are two subunits, S1 and S2, in the SARS-CoV-2 spike (S) glycoprotein. The S1 subunit, the N-terminal 14–685 amino acids of S protein, contains N-terminal domain (NTD), receptor binding domain (RBD), and receptor binding motif (RBM). The SARS-CoV and SARS-CoV-2 S proteins mediate viral entry into host cells by binding to a host receptor, angiotensin-converting enzyme 2 (ACE2), through the receptor-binding domain (RBD), and then fusing the viral and host membranes through the S2 subunit. The ACE2-binding affinity of the Spike RBD of SARS-CoV-2 is 10- to 20-fold higher than that of SARS-CoV.

Both His-tagged and Fc-fused recombinant SARS-CoV-2 S1 RBD are available with an Avi site, which is for biotinylation. Please ask for a quote if you need protein mutants or a protein with different modification or components.

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