SARS-CoV-2 Spike S1 Antibody - BSA Free

Novus Biologicals | Catalog # NBP3-26918

Novus Biologicals
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Key Product Details

Species Reactivity

SARS-CoV-2

Applications

Immunohistochemistry, Western Blot, ELISA, Immunocytochemistry/ Immunofluorescence

Label

Unconjugated

Antibody Source

Polyclonal Rabbit IgG

Format

BSA Free
View all SARS-CoV-2 Spike S1 Primary Antibodies »

Product Specifications

Immunogen

SARS-CoV-2 Spike S1 Antibody was raised against a peptide corresponding to 16 amino acids near the amino terminus of SARS-CoV-2 (COVID-19) Spike S1 glycoprotein. The immunogen is located within the first 50 amino acids of SARS-CoV-2 (COVID-19) Spike S1 protein.

Clonality

Polyclonal

Host

Rabbit

Isotype

IgG

Scientific Data Images for SARS-CoV-2 Spike S1 Antibody - BSA Free

Immunohistochemistry: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] -

Immunohistochemistry: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] - Validation of SARS-CoV-2 Spike S1 in COVID-19 Patient Lung. Analysis of paraffin-embedded COVID-19 patient lung tissue using anti- SARS-CoV-2 Spike S1 antibody (0.5 ug/mL). Tissue was fixed with formaldehyde and blocked with 10% serum for 1 h at RT; antigen retrieval was by heat mediation with a citrate buffer (pH6). Samples were incubated with primary antibody overnight at 4C. A goat anti-rabbit IgG H&L (HRP) at 1/250 was used as secondary. Counter stained with Hematoxylin. Strong signal of SARS-COV-2 spike protein was observed in macrophage of COVID-19 patient lung, but not in non-COVID-19 patient lung.

Western Blot: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] -

Western Blot: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] - Validation with SARS-CoV-2 Spike Recombinant Protein. Loading: 50 ng per lane of SARS-CoV-2 Spike S1 recombinant protein. Antibodies: SARS-CoV-2 Spike S1, NBP3-26918, 1h incubation at RT in 5% NFDM/TBST. Secondary: Goat anti-rabbit IgG HRP conjugate at 1:10000 dilution. Lane 1: 1 ug/mL and Lane 2: 2 ug/mL.

ELISA: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] -

ELISA: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] - Validation with SARS-CoV-2 Spike Recombinant Protein. Antibodies: SARS-CoV-2 Spike S1 antibody, NBP3-26918. A direct ELISA was performed using SARS-CoV-2 (COVID-19) Spike S1 recombinant protein as coating antigen and the anti-SARS-CoV-2 Spike S1 antibody as the capture antibody. Secondary: Goat anti-rabbit IgG HRP conjugate at 1:20000 dilution. Detection range is from 8 ng/mL to 1000 ng/mL.

Immunocytochemistry/Immunofluorescence: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] -

Immunocytochemistry/Immunofluorescence: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] - Validation of SARS-CoV-2 Spike S1 in 293 Transfected Cells. Analysis of 4% paraformaldehyde-fixed Spike transfected 293 cells labeling SARS-CoV-2 Spike S1 with NBP3-26918 at 5 ug/mL, followed by goat anti-rabbit IgG secondary antibody at 1/500 dilution (green) and DAPI staining (blue).

Western Blot: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] -

Western Blot: SARS-CoV-2 Spike S1 Antibody - BSA Free [NBP3-26918] - Overexpression Validation in Spike Transfected 293 Cells. Loading: 10 ug per lane of 293 cell lysate. Antibodies: SARS-CoV-2 Spike S1, NBP3-26918 (1 ug/mL), 1h incubation at RT in 5% NFDM/TBST. Secondary: Goat anti-rabbit IgG HRP conjugate at 1:10000 dilution. Lane 1: WT 293 cells and Lane 2: SARS-CoV-2 Spike overexpressed 293 cells.

Applications for SARS-CoV-2 Spike S1 Antibody - BSA Free

Application
Recommended Usage

Immunohistochemistry

0.5 ug/mL

Western Blot

1-2 ug/mL
Application Notes
SARS-CoV-2 Spike S1 Antibody can be used for the detection of SARS-CoV-2 (COVID-19) Spike protein in ELISA. It will detect 4 ng of free peptide at 1 ug/mL.

Formulation, Preparation, and Storage

Purification

Peptide affinity purified

Formulation

PBS

Format

BSA Free

Preservative

0.02% Sodium Azide

Concentration

1 mg/ml

Shipping

The product is shipped with polar packs. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store at 4C short term. Aliquot and store at -20C long term. Avoid freeze-thaw cycles.

Background: SARS-CoV-2 Spike S1

The SARS-CoV-2 Spike protein is one of the four major structural proteins of severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2), the causative agent of COVID-19 (1,2). The spike protein is the largest of the structural proteins, which also include the membrane (M), envelope (E), and nucleocapsid (N) proteins (1,2). The SARS-CoV-2 spike protein is a 1273 amino acid (aa) heterotrimeric class I fusion protein with each monomer having a theoretical molecular weight of approximately 180 kDa (1). The club-shaped spike protein contains several functional regions and domains including the S1 globular head region which contains the N-terminal receptor-binding domain (RBD) and the S2 stem region that contains the C-terminal fusion domain, two heptad regions, a transmembrane domain, and a cytoplasmic tail (1,2). The viral spike protein is critical for attachment of the virus with the host cell, resulting in fusion and virus entry into the cell (1,2). More specifically, the RBD of the spike protein is responsible for binding to the cell surface receptor angiotensin converting enzyme 2 (ACE2) (1,2). This spike-ACE2 interaction results in a conformational change permitting furin cleavage between the S1 and S2 domains and then cleavage at S2' by TMPRRS2, or another protease, allowing membrane fusion (1,2).

Given the critical role of the spike protein RBD in the interaction with the ACE2 receptor and viral entry, a number of neutralizing antibodies against the RBD have been developed as potential therapeutics for treating COVID-19 (3). These antibodies bind the RBD domain on the S1 subunit inhibiting the interaction with ACE2 (3). However, more studies need to be done as neutralizing antibodies can result in antibody-dependent enhancement, in which the viral entry and replication within the host cell is increased (4). One potential way to combat antibody-dependent enhancement is the use of nanobodies (4). Furthermore, there are currently several vaccine strategies that are in clinical trials, or recently federally approved, that utilize the spike protein in different forms (e.g. full length, S1 RBD, RBD-Fc, N-terminal) for protecting against SARS-CoV-2 infection (4,5). These vaccine strategies include DNA vaccines, viral vector-based vaccines, RNA vaccines, and subunit vaccines (4,5).

References

1. Pillay T. S. (2020). Gene of the month: the 2019-nCoV/SARS-CoV-2 novel coronavirus spike protein. Journal of Clinical Pathology. https://doi.org/10.1136/jclinpath-2020-206658

2. Malik Y. A. (2020). Properties of Coronavirus and SARS-CoV-2. The Malaysian Journal of Pathology.

3. Ho M. (2020). Perspectives on the development of neutralizing antibodies against SARS-CoV-2. Antibody Therapeutics. https://doi.org/10.1093/abt/tbaa009

4. Samrat, S. K., Tharappel, A. M., Li, Z., & Li, H. (2020). Prospect of SARS-CoV-2 spike protein: Potential role in vaccine and therapeutic development. Virus Research. https://doi.org/10.1016/j.virusres.2020.198141

5. Sternberg, A., & Naujokat, C. (2020). Structural features of coronavirus SARS-CoV-2 spike protein: Targets for vaccination. Life Sciences. https://doi.org/10.1016/j.lfs.2020.118056

Alternate Names

SARS-CoV-2

Gene Symbol

S

Additional SARS-CoV-2 Spike S1 Products

Product Documents for SARS-CoV-2 Spike S1 Antibody - BSA Free

Certificate of Analysis

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Product Specific Notices for SARS-CoV-2 Spike S1 Antibody - BSA Free

This product is for research use only and is not approved for use in humans or in clinical diagnosis. Primary Antibodies are guaranteed for 1 year from date of receipt.

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Protocols

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