Recombinant SARS-COV-2 Spike RBD (L452R,E484Q) Protein (RPCB0890)

Product Name:	Recombinant SARS-COV-2 Spike RBD (L452R,E484Q) Protein
SKU:	RPCB0890
Size:	10µg
Tag:	C-His
Reactivity:	SARS-COV-2
Expression Host:	HEK293 cells

Protein Description:	High quality, high purity and low endotoxin recombinant Recombinant SARS-COV-2 Spike RBD(L452R,E484Q) Protein , tested reactivity in HEK293 cells and has been validated in SDS-PAGE.100% guaranteed.
Endotoxin:	<0.1 EU/μg of the protein by LAL method.
Purity:	> 95% by SDS-PAGE.
Formulation:	Lyophilized from a 0.22 μm filtered solution of PBS, pH 7.4.
Gene ID:	43740568（RBD）(L452R,E484Q)

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.

Storage:	Store at -20℃.Store the lyophilized protein at -20℃ to -80 ℃ up to 1 year from the date of receipt.After reconstitution, the protein solution is stable at -20℃ for 3 months, at 2-8℃ for up to 1 week.
Reconstitution:	Centrifuge the vial before opening. Reconstitute to a concentration of 0.1-0.5 mg/mL in sterile distilled water. Avoid vortex or vigorously pipetting the protein. For long term storage, it is recommended to add a carrier protein or stablizer (e.g. 0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose), and aliquot the reconstituted protein solution to minimize free-thaw cycles.
Swiss-Prot:	P0DTC2

	Recombinant SARS-COV-2 Spike RBD(L452R,E484Q) Protein was determined by SDS-PAGE with Coomassie Blue, showing a band at 36kDa.
	Immobilized SARS-CoV-2 Spike RBD at 2μg/mL (100 μL/well) can bind recombinant Human ACE2 with a linear range of 0.03-37.5 ng/mL.