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S1-His Ultra

R6,825.00 – R9,750.00

We have recombinantly produced the S1 subunit, attached to a 6 X Histidine Tag. This antigen is available in 100ug research amounts, as well as mg amounts.

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SKU: Ag_105 Categories: , Tag:

Description

The Spike glycoprotein exists as a trimer located on the outside of the viral membrane. Within the S are two main subunits: S1 and S2. We have recombinantly produced the S1 subunit, attached to a 6 X Histidine Tag. The predicted molecular weight of this protein is 76kDa, however due to the extensive glycosylation it is observed to run at 120kDa. This antigen is available in 100ug research amounts, as well as mg amounts. Our S1-His has been externally validated, appearing in a UCT publication showing it is recognised by SARS-CoV-2 positive patient serum. It is also on an antibody test kit that has been SAHPRA approved and shown to have specificity of 100% and Sensitivity for IgM of 94% and IgG of 100%.

www.pubmed.ncbi.nlm.nih.gov/34025604/
www.medrxiv.org/content/10.1101/2020.08.04.20167940v1

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OVERVIEW

Product Name SARS-CoV-2 Spike S1, His Tag, Ultra
Source SARS-CoV-2 Spike Protein (Genbank # MN908947.3)
Expression host Nicotiana benthamiana
Tag C-terminal 6xHis Tag
Description The S1 portion of the Spike protein of SARS-CoV-2 fused to a polyhistidine and a SEKDEL tag at the C-terminus was recombinantly
expressed in Nicotiana benthamiana plants.
Concentration Approximately 1 mg/ml or variable
Volume Variable
Storage Short term: 2 – 8°C
Long term: -20°C (Aliquot and avoid freeze thaw cycles)

PROPERTIES

Form Liquid
Colour Clear light red-brown liquid
Preparation instructions None. Store immediately.
Storage buffer 0.1M Phosphate Buffered saline, pH 7.4
Preservative: none
Purification notes This product was purified using affinity chromatography.
Purity ≥85% as determined by SDS-PAGE
Stability Stability studies are in progress. Similar products suggest at least a year from manufacturing date when stored under the conditions indicated above.
General notes The spike glycoprotein of SARS-CoV-2 is known to interact with the ACE2 receptor on human respiratory epithelial cells. The receptor binding domain (RBD) is part of the S1 subunit of the spike and is responsible for recognizing the ACE2 receptor.

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