Recombinant Human IFN-alpha H2/IFNA14 Protein, CF Summary
Details of Functionality |
Measured in anti-viral assays using HeLa human cervical epithelial carcinoma cells infected with encephalomyocarditis (EMC) virus. Meager, A. (1987) in Lymphokines and Interferons, a Practical Approach. Clemens, M.J. et al. (eds): IRL Press. 129. The ED50 for this effect is 1.50-15.0 pg/mL. |
Source |
Human embryonic kidney cell, HEK293-derived IFN-alpha H2/IFNA14 protein Cys24-Asp189 |
Accession # |
|
N-terminal Sequence |
Cys24 |
Protein/Peptide Type |
Recombinant Proteins |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain. |
Endotoxin Note |
<0.10 EU per 1 μg of the protein by the LAL method. |
Applications/Dilutions
Dilutions |
|
Theoretical MW |
20 kDa. Disclaimer note: The observed molecular weight of the protein may vary from the listed predicted molecular weight due to post translational modifications, post translation cleavages, relative charges, and other experimental factors. |
SDS-PAGE |
22-26 kDa, under reducing conditions. |
Packaging, Storage & Formulations
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.
|
Buffer |
Lyophilized from a 0.2 μm filtered solution in PBS. |
Purity |
>95%, by SDS-PAGE under reducing conditions and visualized by silver stain. |
Reconstitution Instructions |
Reconstitute at 100 μg/mL in PBS. |
Notes
This product is produced by and ships from R&D Systems, Inc., a Bio-Techne brand.
Alternate Names for Recombinant Human IFN-alpha H2/IFNA14 Protein, CF
Background
Interferons
(IFN) are a family of cytokines with potent antiviral, antiproliferative and
immunomodulatory properties, classified based on their binding specificity to
cell surface receptors (1). Human IFNA2 was originally cloned in the early ‘80s
and now more than a dozen closely related IFN alpha subtypes have been
identified in both the human and mouse genome, each sharing about 80% amino
acid (aa) sequence homology (2-4). Structurally, type I IFNs belong to the class of
five helical‑bundle cytokines, with the IFNA subtypes containing 2 conserved disulfide
bonds (5). The
extracellular domain (ECD) of mature human IFNA14, shares 58% aa sequence identity
with mouse IFNA14. The type I IFNs bind to the interferon alpha receptor
(IFNAR), which consists of two subunits: IFNAR1 (alpha‑subunit) and IFNAR2
(beta-subunit) (6, 7). Individual IFNA subtypes are
known to display unique efficacies to viral protection, and IFNA14 has been
shown to be a strong inducer of IFN-stimulated genes and anti-viral protection
(8). IFNA14 has been shown to
be potent against HIV-1 by up‑regulating the transcription of two intrinsic
restriction factors with well-established anti-HIV-1 activity, MX2 and tetherin
(9).
- Pestka, S. et al. (1987) Annu Rev Biochem. 56:727.
- Goeddel, D.V. et al. (1980) Nature 287:411.
- Matsumiya, T. et al. (2007) J. Immunol. 179:4542.
- Schreiber, G. and J. Piehler (2015) Trends Immunol. 36:139.
- Wittling, M.C. et al. (2021) Front Immunol. 11:605673.
- van Pesch, V. et al. (2004) J. Virol. 78:8219.
- James, C.M. et al. (2007) Vaccine. 25(10):1856.
- Moll, H.P. et al. (2011) Cytokine. 53:52.
- Lavender, K.J. et al. (2016) J Virol. 90:6001.
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