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SARS-CoV-2 (2019-nCoV) Spike/RBD Protein

Introduction

The spike 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 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 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.

Protein Construction:

A DNA sequence encoding the SARS-CoV-2 (2019-nCoV) Spike Protein (RBD) (Gln321-Ser591) was expressed.

Species:

SARS-CoV-2

Expressed Host:

HEK293 Cells

Purity:

> 95% as determined by SDS-PAGE.

Endotoxin:

< 1.0 EU per μg protein as determined by the LAL method.

Predicted N Terminal:

Gln

Molecule Weight:

The recombinant SARS-CoV-2 (2019-nCoV) Spike Protein (RBD) consists of 271 amino acids and predicts a molecular mass of 30.3 kDa.

Protein Storage Buffer:

PBS, 50% glycerol, pH 7.4.

 

SDS-PAGE:

Reference:

  1. Shen S, et al. (2007) Expression, glycosylation, and modification of the spike (S) glycoprotein of SARS CoV. Methods Mol Biol. 379: 127-35.
  2. Du L, et al. (2009) The spike protein of SARS-CoV–a target for vaccine and therapeutic development. Nat Rev Microbiol. 7 (3): 226-36.
  3. Xiao X, et al. (2004) The SARS-CoV S glycoprotein. Cell Mol Life Sci. 61 (19-20): 2428-30.

 

To Order

Buy Cat. No. Product Name Unit Price
P101 SARS-CoV-2 (2019-nCoV) Spike/RBD Protein 100 µg $460

Documents

Protocol (PDF): P101  
MSDS (PDF):  MSDS-P101