1. Recombinant Proteins
  2. Viral Proteins
  3. SARS-CoV-2 Proteins
  4. SARS-CoV-2 Spike Proteins
  5. SARS-CoV-2 S Protein RBD
  6. SARS-CoV-2 S Protein RBD (HEK293)

SARS-CoV-2 S Protein RBD (HEK293)

Cat. No.: HY-P73396
COA Handling Instructions

The SARS-Cov-2 S glycoprotein is a SARS-Cov-2 S glycoprotein. The amino acid sequence 1261-1267a.a of the SARS-Cov-2 S glycoprotein is transmembrane. The SARS-Cov-2 S glycoprotein is a highly glycosylated trimer, each of which consists of 1260 amino acids (residues 14-1273), divided into four structural domains: the n-terminal domain (NTD), the c-terminal domain (CTD, also known as the receptor-binding domain, RBD), and two subdomains (SD1 and SD2). SARS-CoV-2 S Protein RBD (HEK293) is the recombinant Virus-derived SARS-CoV-2 S protein RBD, expressed by HEK293 , with tag free. The total length of SARS-CoV-2 S Protein RBD (HEK293) is 223 a.a., with molecular weight of approximately 34 kDa.

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  • Biological Activity

  • Technical Parameters

  • Properties

  • Documentation

Description

The SARS-Cov-2 S glycoprotein is a SARS-Cov-2 S glycoprotein. The amino acid sequence 1261-1267a.a of the SARS-Cov-2 S glycoprotein is transmembrane. The SARS-Cov-2 S glycoprotein is a highly glycosylated trimer, each of which consists of 1260 amino acids (residues 14-1273), divided into four structural domains: the n-terminal domain (NTD), the c-terminal domain (CTD, also known as the receptor-binding domain, RBD), and two subdomains (SD1 and SD2). SARS-CoV-2 S Protein RBD (HEK293) is the recombinant Virus-derived SARS-CoV-2 S protein RBD, expressed by HEK293 , with tag free. The total length of SARS-CoV-2 S Protein RBD (HEK293) is 223 a.a., with molecular weight of approximately 34 kDa.

Background

SARS-Cov-2 is a enveloped positive-sense single-stranded RNA virus that causes COVID-19.
SARS-CoV-2 possesses four structural proteins, namely the envelope protein (E), spike or surface glycoprotein (S), membrane protein (M), and nucleocapsid protein (N).
The SARS-Cov-2 S glycoprotein is located on the exterior of the viral particle, giving the coronavirus its crown-like appearance.
The SARS-Cov-2 S glycoprotein can mediate the attachment and entry of viral particles into host cells and is an important target for vaccine development, antibody therapy, and antigen-based diagnostic esting[1][2][3][4][5].

Biological Activity

1. Measured by its binding ability in a functional ELISA. Immobilized SARS-CoV-2 S Protein RBD at 2 μg/mL (100 μL/well) can bind ACE2 Protein, Human (mFc) and the EC50 is 20-80 ng/mL.
2. Immobilized Human ACE2 at 2 μg/mL (100 μL/well) can bind SARS-CoV-2 S protein. The ED50 for this effect is 10.95 ng/mL, corresponding to a specific activity is 9.13×104 Unit/mg.

  • Immobilized Human ACE2 at 2μg/mL (100 μL/well) can bind SARS-CoV-2 S protein. The ED50 for this effect is 10.95ng/mL, corresponding to a specific activity is 9.13×104 Unit/mg.
Species

Virus

Source

HEK293

Tag

Tag Free

Accession

YP_009724390.1 (R319-F541)

Gene ID

43740568  [NCBI]

Molecular Construction
N-term
Spike RBD (R319-F541)
Accession # YP_009724390.1
C-term
Synonyms
2019-nCov RBD Protein; 2019-nCoV Spike RBD Protein; S protein RBD; 2019-nCoV S protein RBD
AA Sequence

RVQPTESIVRFPNITNLCPFGEVFNATRFASVYAWNRKRISNCVADYSVLYNSASFSTFKCYGVSPTKLNDLCFTNVYADSFVIRGDEVRQIAPGQTGKIADYNYKLPDDFTGCVIAWNSNNLDSKVGGNYNYLYRLFRKSNLKPFERDISTEIYQAGSTPCNGVEGFNCYFPLQSYGFQPTNGVGYQPYRVVVLSFELLHAPATVCGPKKSTNLVKNKCVNF

Molecular Weight

approximately 34 kDa

Purity
  • Greater than 90% as determined by reducing SDS-PAGE.
Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.2 μm filtered solution of PBS, pH 7.4 (Normally 5 % - 8 % trehalose, mannitol and 0.01% Tween 80 are added as protectants before lyophilization.) or 20 mM PB, 150 mM NaCl, pH 7.4.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O.

Storage & Stability

Stored at -20°C for 2 years. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

SARS-CoV-2 S Protein RBD (HEK293) Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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