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Updated: Aug 8, 2026

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes
10:00

High-throughput Quantitative Real-time RT-PCR Assay for Determining Expression Profiles of Types I and III Interferon Subtypes

Published on: March 24, 2015

The human type I interferon receptor. Identification of the interferon beta-specific receptor-associated

E Croze1, D Russell-Harde, T C Wagner

  • 1Department of Protein Biochemistry and Biophysics, Berlex Biosciences, Richmond, California 94804, USA. ed_Croze@berlex.com

The Journal of Biological Chemistry
|December 27, 1996
PubMed

Insights

The interferon beta (IFN-beta)-specific phosphoprotein is IFNAR2.2, a key component of the type I interferon receptor. This protein associates with IFNAR1 upon IFN-beta stimulation, but not IFN-alpha, indicating differential receptor interactions.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • The type I interferon receptor complex is crucial for cellular responses to interferons.
  • Understanding the specific roles of receptor components like IFNAR1 and IFNAR2.2 is essential for deciphering interferon signaling pathways.

Purpose of the Study:

  • To identify the interferon beta (IFN-beta)-specific receptor-associated phosphoprotein.
  • To investigate the differential interactions of IFNAR1 and IFNAR2.2 with IFN-beta and IFN-alpha.

Main Methods:

  • Utilized specific antibodies for immunoprecipitation of IFNAR1 and IFNAR2.2.
  • Analyzed tyrosine phosphorylation status of receptor components upon interferon stimulation.
  • Compared receptor complex formation in Daudi cells treated with IFN-beta versus IFN-alpha.

Main Results:

  • Identified IFNAR2.2 as the IFN-beta-specific phosphoprotein, associating with IFNAR1 upon IFN-beta stimulation.
  • Observed IFNAR2.2 associated with IFNAR1 only after IFN-beta treatment, not IFN-alpha treatment.
  • Both IFNAR1 and IFNAR2.2 undergo tyrosine phosphorylation with both IFN-alpha and IFN-beta stimulation.

Conclusions:

  • IFNAR2.2 is the specific phosphoprotein associated with the type I interferon receptor upon IFN-beta stimulation.
  • IFN-beta and IFN-alpha exhibit distinct interaction patterns with the IFNAR1 and IFNAR2.2 receptor chains.
  • Despite shared receptor chains and phosphorylation, IFN-alpha and IFN-beta interact differently with the type I interferon receptor complex.

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