Recombinant SARS-CoV-2 B.1.617.2 S Alexa Fluor® 488 Protein

Catalog #: AFG10878 Datasheet / COA / SDS

(GCN4-IZ) His-tag India Variant (Delta)

Catalog #	Availability	Size / Price	Qty
AFG10878-020

Detection of ACE-2 on HEK293 Transfectants with Recombinant SARS-CoV-2 Spike B.1.617.2 (GCN4-IZ) His-tag Alexa Fluor® 488 by Flow Cytometry.

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Summary Product Datasheets Carrier Free Data Images Reconstitution Calculator Background Related Research Areas

Recombinant SARS-CoV-2 B.1.617.2 S Alexa Fluor® 488 Protein Summary

Learn more about Fluorokines^TM Fluorescent-Labeled Proteins

Product Specifications

Purity

>95%, by SDS-PAGE visualized with Silver Staining and quantitative densitometry by Coomassie® Blue Staining.

Endotoxin Level

<1.0 EU per 1 μg of the protein by the LAL method.

Activity

Measured by flow cytometry for its ability to bind HEK293 human embryonic kidney cells transfected with human ACE-2 at 0.25-1.00 µg/mL (100 µL/well).

Please Note: Optimal dilutions should be determined by each laboratory for each application.

Source

Human embryonic kidney cell, HEK293-derived sars-cov-2 Spike protein

SARS-CoV-2 B.1.617.2 Spike (Val16-Lys1211) (Thr19Arg, Gly142Asp, Glu156Gly, Phe157 del, Arg158 del, Leu452Arg, Thr478Lys, Asp614Gly, Pro681Arg, Asp950Asn)(Arg682Ser, Arg685Ser, Lys986Pro, Val987Pro) Accession # YP_009724390.1	GCN4-IZ	6-His tag
N-terminus		C-terminus

Accession #

YP_009724390.1

N-terminal Sequence
Analysis

Val16

Structure / Form

Labeled with Alexa Fluor® 488 via amines
Excitation Wavelength: 488 nm
Emission Wavelength: 515-545 nm

Predicted Molecular Mass

138 kDa

SDS-PAGE

144-170 kDa, under reducing conditions.

Product Datasheets

AFG10878

Product Datasheet

COA

SDS

AFG10878

Formulation	Supplied as a 0.2 μm filtered solution in PBS with BSA as a carrier protein.
Shipping	The product is shipped with dry ice or equivalent. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	Protect from light. Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 6 months from date of receipt, -20 to -70 °C as supplied. 1 month, 2 to 8 °C under sterile conditions after opening. 3 months, -20 to -70 °C under sterile conditions after opening.

Scientific Data

Flow Cytometry

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HEK293 human embryonic kidney cells transfected with human ACE-2 were stained with (A) 1 µg/mL (100 µL/well) Recombinant SARS-CoV-2 Spike B.1.617.2 (GCN4-IZ) His-tag Alexa Fluor® 488 Protein (Catalog # AFG10878) or (B) unstained.

SDS-PAGE

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2 μg/lane of Recombinant SARS-CoV-2 B.1.617.2 S Alexa Fluor® 488 Protein (AFG10878) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 144-170 kDa.

Reconstitution Calculator

Background: Spike

SARS-CoV-2, which causes the global pandemic coronavirus disease 2019 (Covid-19), belongs to a family of viruses known as coronaviruses that also include MERS and SARS-CoV-1. Coronaviruses are commonly comprised of four structural proteins: Spike protein (S), Envelope protein (E), Membrane protein (M) and Nucleocapsid protein (N) (1). The SARS-CoV-2 S protein is a glycoprotein that mediates membrane fusion and viral entry. The S protein is homotrimeric, with each ~180-kDa monomer consisting of two subunits, S1 and S2 (2). In SARS-CoV-2, as with most coronaviruses, proteolytic cleavage of the S protein into S1 and S2 subunits is required for activation. The S1 subunit is focused on attachment of the protein to the host receptor while the S2 subunit is involved with cell fusion (3-5). A metallopeptidase, angiotensin-converting enzyme 2 (ACE-2), has been identified as a functional receptor for SARS-CoV-2 through interaction with a receptor binding domain (RBD) located at the C-terminus of S1 subunit (6, 7). The S protein of SARS-CoV-2 shares 75% and 29% amino acid sequence identity with S protein of SARS-CoV-1 and MERS, respectively. The SARS-CoV-2 delta variant (B.1.617.2) carrying the amino acid substitution L452R and T478K in the RBD was identified as a prevalent strain in India and has been detected in more than 40 countries (8, 9). It has higher transmissible rate and more resistant to vaccine (10).

References

Wu, F. et al. (2020) Nature 579:265.
Tortorici, M.A. and D. Veesler (2019) Adv. Virus Res. 105:93.
Bosch, B.J. et al. (2003). J. Virol. 77:8801.
Belouzard, S. et al. (2009) Proc. Natl. Acad. Sci. 106:5871.
Millet, J.K. and G.R. Whittaker (2015) Virus Res. 202:120.
Li, W. et al. (2003) Nature 426:450.
Wong, S.K. et al. (2004) J. Biol. Chem. 279:3197.
Yadav, P.D. et al. (2021) bioRxiv https://doi.org/10.1101/2021.04.23.441101.
Cherian, S. et al. (2021) bioRxiv https://doi.org/10.1101/2021.04.22.440932.
Bernal, J. et al. (2021) medRxiv https://doi.org/10.1101/2021.05.22.21257658.

Long Name

Spike Protein

Entrez Gene IDs

918758 (HCoV-229E); 2943499 (HCoV-NL63); 39105218 (HCoV-OC43); 37616432 (MERS-CoV); 1489668 (SARS-CoV); 43740568 (SARS-CoV-2)

Alternate Names

2019-nCoV S Protein; 2019-nCoV Spike; COVID-19 Spike; E2; Human coronavirus spike glycoprotein; Peplomer protein; S glycoprotein; S Protein; SARS-COV-2 S protein; SARS-COV-2 Spike glycoprotein; SARSCOV2 Spike protein; SARS-CoV-2; Severe Acute Respiratory Syndrome Coronavirus 2 Spike Protein; Spike glycoprotein; Spike; surface glycoprotein

Product Specific Notices

This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.
This product is provided under an agreement between Life Technologies Corporation and R&D Systems, Inc, and the manufacture, use, sale or import of this product is subject to one or more US patents and corresponding non-US equivalents, owned by Life Technologies Corporation and its affiliates. The purchase of this product conveys to the buyer the non-transferable right to use the purchased amount of the product and components of the product only in research conducted by the buyer (whether the buyer is an academic or for-profit entity). The sale of this product is expressly conditioned on the buyer not using the product or its components (1) in manufacturing; (2) to provide a service, information, or data to an unaffiliated third party for payment; (3) for therapeutic, diagnostic or prophylactic purposes; (4) to resell, sell, or otherwise transfer this product or its components to any third party, or for any other commercial purpose. Life Technologies Corporation will not assert a claim against the buyer of the infringement of the above patents based on the manufacture, use or sale of a commercial product developed in research by the buyer in which this product or its components was employed, provided that neither this product nor any of its components was used in the manufacture of such product. For information on purchasing a license to this product for purposes other than research, contact Life Technologies Corporation, Cell Analysis Business Unit, Business Development, 29851 Willow Creek Road, Eugene, OR 97402, Tel: (541) 465-8300. Fax: (541) 335-0354.