SARS-CoV-2 Spike RBD Protein, His Tag (BA.3/Omicron) (MALS verified)

SARS-CoV-2 Spike RBD, His Tag (BA.3/Omicron) (SPD-C522i) is expressed from human 293 cells (HEK293). It contains AA Arg 319 - Lys 537 (Accession # QHD43416.1 (G339D,S371F,S373P,S375F,D405N,K417N,N440K,G446S,S477N,T478K,E484A,Q493R,Q498R,N501Y,Y505H)). The spike mutations are identified on the SARS-CoV-2 Omicron variant (Pango lineage: BA.3; GISAID clade: GRA; Nextstrain clade: 21M).

Product Specifications

Background

It's 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.

Specifications

This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 26.8 kDa. The protein migrates as 33-37 kDa under reducing (R) condition (SDS-PAGE) due to glycosylation.

Expression Region

Arg 319 - Lys 537

Host

HEK 293

Target

Spike RBD

Conjugation

Unconjugated

Tag

C-10×His

Source

SARS-CoV-2

Stability

-20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution._x000D_For long term storage, the product should be stored at lyophilized state at -20°C or lower.

Endotoxin

1.0 EU per μg

Purity

95%

Bioactivity

Immobilized SARS-CoV-2 Spike RBD, His Tag (BA.3/Omicron) (Cat. No. SPD-C522i) at 2 μg/mL (100 μL/well) can bind Human ACE2, Fc Tag (Cat. No. AC2-H5257) with a linear range of 1-31 ng/mL (QC tested).