| Post Translational Modifications | Phosphorylated on tyrosine residues upon interferon binding. Phosphorylation at Tyr-335 or Tyr-510 are sufficient to mediate interferon dependent activation of STAT1, STAT2 and STAT3 leading to antiproliferative effects on many different cell types. |
| Function | Together with IFNAR1, forms the heterodimeric receptor for type I interferons (including interferons alpha, beta, epsilon, omega and kappa). Type I interferon binding activates the JAK-STAT signaling cascade, resulting in transcriptional activation or repression of interferon-regulated genes that encode the effectors of the interferon response. Mechanistically, type I interferon-binding brings the IFNAR1 and IFNAR2 subunits into close proximity with one another, driving their associated Janus kinases (JAKs) (TYK2 bound to IFNAR1 and JAK1 bound to IFNAR2) to cross-phosphorylate one another. The activated kinases phosphorylate specific tyrosine residues on the intracellular domains of IFNAR1 and IFNAR2, forming docking sites for the STAT transcription factors (STAT1, STAT2 and STAT). STAT proteins are then phosphorylated by the JAKs, promoting their translocation into the nucleus to regulate expression of interferon-regulated genes. Isoform 2: May be potent inhibitors of type I IFN receptor activity. Isoform 3: May be potent inhibitors of type I IFN receptor activity. |
| Protein Name | Interferon Alpha/Beta Receptor 2Ifn-R-2Ifn-Alpha/Beta Receptor 2Type I Interferon Receptor 2 |
| Database Links | Reactome: R-MMU-909733Reactome: -MMU-912694 |
| Cellular Localisation | Isoform 1: Cell MembraneSingle-Pass Type I Membrane ProteinIsoform 2: SecretedIsoform 3: Secreted |
| Alternative Protein Names | Interferon Alpha/Beta Receptor 2 proteinIfn-R-2 proteinIfn-Alpha/Beta Receptor 2 proteinType I Interferon Receptor 2 proteinIfnar2 protein |
Information sourced from Uniprot.org
