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Recombinant SARS-CoV-2 S-trimer Protein (His Tag)

  • Cat.No.:PKSR030489

  • Expression host: HEK293 Cells

To Purchase PKSR030489

  • 50μg
  • 1mg
Price: $415


Synonyms 2019-nCov S protein;2019-nCoV Spike glycoprotein;2019-nCoV S glycoprotein
Species SARS-CoV-2
Expression_host HEK293 Cells
Sequence Cys15-Gln1208
Accession QHD43416.1
Application Immunogen(E-AB-V1021,E-AB-V1022,E-AB-V1023,E-AB-V1026,E-AB-V1027)
Mol_Mass 136.6 kDa
AP_Mol_Mass 170-220 kDa
Tag C-His
Bio_Activity Loaded Human ACE-2-Fc on Protein A Biosensor, can bind 2019-nCoV S-trimer Protein-His with an affinity constant of 0.125 nM as determined in BLI assay.


Purity > 95 % as determined by reducing SDS-PAGE.
Endotoxin level < 1.0 EU per μg of the protein as determined by the LAL method.
Storage Store at < -20°C, stable for 6 months. Please minimize freeze-thaw cycles.
Shipping This product is provided as liquid. It is shipped at frozen temperature with blue ice/gel packs. Upon receipt, store it immediately at < - 20°C.
Formulation Supplied as a 0.2 μm filtered solution of PBS, pH7.4.
Reconstitution Not Applicable


The spike (S) glycoprotein of coronaviruses contains protrusions that will only bind to certain receptors on the host cell. Known receptors bind S1 are ACE2, angiotensin-converting enzyme 2; DPP4, dipeptidyl peptidase-4; APN, aminopeptidase N; CEACAM, carcinoembryonic antigen-related cell adhesion molecule 1; Sia, sialic acid; O-ac Sia, O-acetylated sialic acid. The spike is essential for both host specificity and viral infectivity. The spike (S) glycoprotein of coronaviruses is known to be essential in the binding of the virus to the host cell at the advent of the infection process. It's been reported that SARS-CoV-2 (COVID-19 coronavirus, 2019-nCoV) 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. The main functions for the Spike protein are summarized as: Mediate receptor binding and membrane fusion; Defines the range of the hosts and specificity of the virus; Main component to bind with the neutralizing antibody; Key target for vaccine design; Can be transmitted between different hosts through gene recombination or mutation of the receptor binding domain (RBD), leading to a higher mortality rate.


    A high-affinity aptamer with base-appended base-modified DNA bound to isolated authentic SARS-CoV-2 strains wild-type and B.1.617.2 (delta variant)

    DOI: 10.1016/j.bbrc.2022.04.071

    PMID: 35617879


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