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Recombinant SARS-CoV-2 (COVID-19) S protein (D614G, R683A, R685A), His Tag, Super stable trimer (MALS verified), 50µg  

Recombinant SARS-CoV-2 (COVID-19) S protein (D614G, R683A, R685A), His Tag, Super stable trimer (MALS verified), 50µg

Recombinant SARS-CoV-2 (COVID-19) S protein (D614G, R683A, R685A), Super stable trimer (MALS verified), expressed from human 293 cells (HEK293), His Tag

Synonyms: Recombinant, protein, S protein, Spike glycoprotein, S glycoprotein, COVID-19

More details

SPN-C52H3-50

Availability: within 7 days

540,00 €

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.

Source
Recombinant SARS-CoV-2 S protein (D614G, R683A, R685A), His Tag, Super stable trimer (SPN-C52H3) is the ectodomain of SARS-CoV-2 S protein that contains AA Val 16 - Pro 1213 (Accession # QHD43416.1) and D614G mutation, which has become increasingly common in SARS-CoV-2 viruses from around the world . 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.

Molecular Characterization
This protein carries a polyhistidine tag at the C-terminus. The protein has a calculated MW of 138.0 kDa. The protein migrates as 170-200 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. Normally Trehalose are added as protectants before lyophilization.

Reconstitution
See Certificate of Analysis for reconstitution instructions and specific concentrations.

Bioactivity
Please refer to product data sheet.

Storage
Avoid repeated freeze-thaw cycles.
-20°C to -70°C for 12 months in lyophilized state; -70°C for 3 months under sterile conditions after reconstitution

References

(1) Wan Y, et al. J Virol. 2020. pii: JVI.00127-20.
(2) Benvenuto D, et al. J Med Virol. 2020.
(3) Chang CY, et al. AMB Express. 2020. 10(1):20.