Recombinant SARS-CoV-2 AY.1 Spike (GCN4-IZ) His Protein, CF

Catalog #: 10922-CV 1 Review Datasheet

Delta Plus Variant

Catalog #	Availability	Size / Price	Qty
10922-CV-100

Recombinant SARS-CoV-2 AY.1 Spike (GCN4-IZ) His-tag Protein SDS-PAGE.

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

Recombinant SARS-CoV-2 AY.1 Spike (GCN4-IZ) His Protein, CF Summary

Product Specifications

Purity

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

Endotoxin Level

<0.10 EU per 1 μg of the protein by the LAL method.

Activity

Measured by its binding ability in a functional ELISA with Recombinant Human ACE-2 His-tag (Catalog # 933-ZN).

Source

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

SARS-CoV-2 AY.1 Spike (Val16-Lys1211)(Thr19Arg, Thr95Ile, Gly142Asp, Glu156Gly, Phe157 del, Arg158 del, Trp258Leu, Lys417Asn, 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

Predicted Molecular Mass

138 kDa

SDS-PAGE

142-170 kDa, under reducing conditions.

Product Datasheets

10922-CV

Product Datasheet

Carrier Free

What does CF mean?

CF stands for Carrier Free (CF). We typically add Bovine Serum Albumin (BSA) as a carrier protein to our recombinant proteins. Adding a carrier protein enhances protein stability, increases shelf-life, and allows the recombinant protein to be stored at a more dilute concentration. The carrier free version does not contain BSA.

What formulation is right for me?

In general, we advise purchasing the recombinant protein with BSA for use in cell or tissue culture, or as an ELISA standard. In contrast, the carrier free protein is recommended for applications, in which the presence of BSA could interfere.

10922-CV

Formulation	Lyophilized from a 0.2 μm filtered solution in PBS with Trehalose.
Reconstitution	Reconstitute at 500 μg/mL in PBS.
Shipping	The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.
Stability & Storage:	Use a manual defrost freezer and avoid repeated freeze-thaw cycles. 12 months from date of receipt, -20 to -70 °C as supplied. 1 month, 2 to 8 °C under sterile conditions after reconstitution. 3 months, -20 to -70 °C under sterile conditions after reconstitution.

Scientific Data

SDS-PAGE

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2 μg/lane of Recombinant SARS-CoV-2 AY.1 Spike (GCN4-IZ) His-tag Protein (Catalog # 10922-CV) was resolved with SDS-PAGE under reducing (R) and non-reducing (NR) conditions and visualized by Coomassie® Blue staining, showing bands at 142-170 kDa.

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 (ACE2), 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 (aa) sequence identity with the S protein of SARS-CoV-1 and MERS, respectively. AY.1 is a sublineage of SARS-CoV-2 delta plus variant which carries the aa substitution L417N, L452R, and T478K in the RBD. It was first identified in India and quickly spread to US through England and Japan. It is reported to partially escape neutralization of antibodies and vaccines (8).

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.
Kannan, S.R. et al. (2021) J. Autoimmun. 124:https://doi.org/10.1016/j.jaut.2021.102715.

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