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Vaccinia Virus B18R / B19R Protein (His Tag)

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Vaccinia Virus B18R Protein Product Information
Protein Construction:A DNA sequence encoding the B18R (P25213) (Met1-Glu351) was expressed with a C-terminal polyhistidine tag.
Species:Vaccinia Virus
Expressed Host:Baculovirus-Insect Cells
Shipping:In general, recombinant proteins are provided as lyophilized powder which are shipped at ambient temperature.
Bulk packages of recombinant proteins are provided as frozen liquid. They are shipped out with blue ice unless customers require otherwise.
Vaccinia Virus B18R Protein QC Testing
Purity:> 90 % as determined by SDS-PAGE
Endotoxin:< 1.0 EU per μg of the protein as determined by the LAL method
Stability:Samples are stable for up to twelve months from date of receipt at -70℃
Predicted N Terminal:His 20
Molecule Mass:The secreted recombinant B18R consists of 342 amino acids and predicts a molecular mass of 39.8 KDa. The apparent molecular mass of the protein is approximately 46 KDa in SDS-PAGE under reducing conditions due to glycosylation.
Formulation:Lyophilized from sterile PBS, pH 7.4.
1. Normally 5 % - 8 % trehalose and mannitol are added as protectants before lyophilization. Specific concentrations are included in the hardcopy of COA.
2. Please contact us for any concerns or special requirements.
Vaccinia Virus B18R Protein Usage Guide
Storage:Store it under sterile conditions at -20℃ to -80℃. It is recommended that the protein be aliquoted for optimal storage. Avoid repeated freeze-thaw cycles.
Reconstitution:A hardcopy of COA with reconstitution instruction is sent along with the products. Please refer to it for detailed information.
Vaccinia Virus B18R Protein SDS-PAGE
Vaccinia Virus B18R Protein (His Tag) SDS-PAGE
Vaccinia Virus B18R Protein (His Tag) SDS-PAGE
Other B18R Recombinant Protein Products
B18R / B19R Background

B18R is a type I interferon (IFN)-binding protein, which is encoded by the B18R open reading frame in the WR (Western Reserve)strain of vaccinia virus. It is also known as B19R in the Copenhagen strain of Vaccinia. B18R exists in a soluble and a membrane-bound form. As a type I IFN receptor, B18R has a broad species specificity. It has high affinity for human IFN-alpha and also binds rabbit, bovine, rat, pig, and mouse IFN-alpha and IFN-beta. It has been shown that secreted B18R binds to uninfected and infected cells. It presents at the cell surface and protects cells from the antiviral state induced by IFN-alpha and IFN-beta. Binding of soluble recombinant B18R protects cultured cells from IFN and allows vaccinia virus replication.

Vaccinia Virus B18R / B19R References
  1. I Vancov. et al., 1998, J Gen Virol July. 79 (7): 1647-9.
  2. Colamonici OR. et al., 1995, J Biol Chem. 270 (27): 15974-8.
  3. Goebel SJ. et al., 1990, Virology 179: 247-66.
  4. Goebel SJ. et al., 2010, J Cell Biol. 190 (4): 533-9.
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Catalog: 40020-V08B-10
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