Human IFNAR2 (His Tag) recombinant protein

Human IFNAR2 (His Tag) recombinant protein

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Interferon-alpha/beta receptor beta chain (IFNAR2) is a type I membrane protein that forms one of the two chains of a receptor for interferons alpha and beta. Binding and activation of the receptor stimulates Janus protein kinases, which in turn phosphorylate several proteins, including STAT1 and STAT2. Initial cell-surface IFNAR2 expression at diagnosis assessed by flow cytometry widely distributed but showed overall significantly higher expression in CML patients when compared with normal controls. In 15 fresh patients who subsequently received IFNα therapy, IFNAR2 expression at diagnosis was significantly higher in cytogenetic good responders than in poor responders. Down-regulation of IFNAR2 expression during IFNα therapy was observed only in good responders but not in poor responders. The encoded protein also functions as an antiviral factor. IFNAR2 may associate with IFNAR1 to form the type I interferon receptor. This protein serves as a receptor for interferons alpha and beta. IFNAR2 is also involved in IFN-mediated STAT1, STAT2 and STAT3 activation. Isoform 1 and isoform 2 are directly involved in signal transduction due to their association with the TYR kinase, JAK1. Isoform 3 is a potent inhibitor of type I IFN receptor activity. Following binding of IFNα2, IFNAR2 is internalized, but, instead of being routed towards degradation as it is when complexed to IFNβ, it recycles back to the cell surface.

Interferon alpha/beta receptor 2

IFNAR-2; IFN-R-2; IFNAR2; IFNABR; IFN-R; IFN-ALPHA-REC; AI747302; IFNARB

P48551

IFNAR2; IFNABR; IFNARB

Human Cells

A DNA sequence encoding the extracellular domain of human IFNAR2 isoform a (NP_997468.1) (Met 1-Lys 243) was expressed, fused with a polyhistidine tag at the C-terminus.

Human

The recombinant human IFNAR2 consists of 228 amino acids and predicts a molecular mass of 26.2 kDa. As a result of glycosylation, the rh IFNAR2 migrates as an approximately 45 kDa band in SDS-PAGE under reducing conditions.

> 95 % as determined by SDS-PAGE

Measured by its ability to inhibit rh IFNβ mediated protection of WISH human amnion cells infected with vesicular stomatitis virus (VSV) to viral lysis. The EC₅₀ for this effect is typically 0.08-0.4 μg/ml.