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Recombinant 2019-nCoV S1 Protein (His Tag)(Active)

  • Cat.No.:PKSR030514

  • Expression host: Baculovirus-Insect Cells

To Purchase PKSR030514

Size:
  • 100µg
Price: $1084
Qty:

Description

Synonyms coronavirus spike; cov spike; ncov RBD; ncov s1; ncov s2; ncov spike; NCP-CoV RBD; NCP-CoV s1; NCP-CoV s2; NCP-CoV Spike; novel coronavirus RBD; novel coronavirus s1; novel coronavirus s2; novel coronavirus spike; RBD; S1; S2; Spike RBD
Species virus
Expression_host Baculovirus-Insect Cells
Sequence Met1-Arg685
Accession YP_009724390.1
Mol_Mass 76.45 kDa
Tag C-His
Bio_Activity Measured by its binding ability in a functional ELISA. Immobilized Recombinant Human ACE2 Protein (mFc Tag)(Cat#PKSR030509) at 2 μg/mL (100 μL/well) can bind Recombinant 2019-nCoV S1 Protein, Biotinylated (His Tag) (Cat#PKSR030514), the EC50 of PKSR030514 is 300-700 ng/mL.

Properties

Purity > 90 % as determined by reducing SDS-PAGE.
Endotoxin level < 1.0 EU per µg as determined by the LAL method.
Storage Lyophilized proteins are stable for up to 12 months when stored at -20 to -80°C. Reconstituted protein solution can be stored at 4-8℃ for 2-7 days. Aliquots of reconstituted samples are stable at < -20℃ for 3 months.
Shipping This product is provided as lyophilized powder which is shipped with ice packs.
Formulation Lyophilized from sterile 20 mM Tris, 300 mM NaCl, 10 % glycerol, pH 7.5.
Reconstitution Please refer to the printed manual for detailed information.

Background

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 term 'peplomer' is typically used to refer to a grouping of heterologous proteins on the virus surface that function together. 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.

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