TRADD interacts with STAT1-α and influences interferon-γ signaling

Academic Article


  • Tumor necrosis factor receptor 1 (TNFR1)-associated death domain protein (TRADD) is essential in recruiting signaling molecules to the TNFR1 receptor complex. Interferon-γ (IFN-γ) is a potent activator of macrophages and uses signal transducer and activator of transcription 1-α (STAT1-α) for signal transduction. Here we demonstrate that IFN-γ induces the formation of a nuclear-localized TRADD-STAT1-α complex. IFN-γ-mediated STAT1-α phosphorylation was prolonged in cells with reduced TRADD expression. Moreover, we noted an increase in IFN-γ-mediated STAT1-α DNA-binding activity, nuclear presence and transcriptional potential in the TRADD knockdown cells. These data indicate that TRADD may be involved in IFN-γ signaling by forming a complex with STAT1-α within the nucleus and regulating IFN-γ-mediated STAT1-α activation.
  • Published In

  • Nature Immunology  Journal
  • Digital Object Identifier (doi)

    Author List

  • Wesemann DR; Qin H; Kokorina N; Benveniste EN
  • Start Page

  • 199
  • End Page

  • 207
  • Volume

  • 5
  • Issue

  • 2