TRADD protein is an essential component of the RIG-like helicase antiviral pathway

Immunity. 2008 May;28(5):651-61. doi: 10.1016/j.immuni.2008.03.013. Epub 2008 Apr 24.


Upon detection of viral RNA, the helicases RIG-I and/or MDA5 trigger, via their adaptor Cardif (also known as IPS-1, MAVS, or VISA), the activation of the transcription factors NF-kappaB and IRF3, which collaborate to induce an antiviral type I interferon (IFN) response. FADD and RIP1, known as mediators of death-receptor signaling, are implicated in this antiviral pathway; however, the link between death-receptor and antiviral signaling is not known. Here we showed that TRADD, a crucial adaptor of tumor necrosis factor receptor (TNFRI), was important in RIG-like helicase (RLH)-mediated signal transduction. TRADD is recruited to Cardif and orchestrated complex formation with the E3 ubiquitin ligase TRAF3 and TANK and with FADD and RIP1, leading to the activation of IRF3 and NF-kappaB. Loss of TRADD prevented Cardif-dependent activation of IFN-beta, reduced the production of IFN-beta in response to RNA viruses, and enhanced vesicular stomatitis virus replication. Thus, TRADD is not only an essential component of proinflammatory TNFRI signaling, but is also required for RLH-Cardif-dependent antiviral immune responses.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adaptor Proteins, Signal Transducing / metabolism
  • Animals
  • DNA Helicases / metabolism*
  • Fas-Associated Death Domain Protein / metabolism
  • GTPase-Activating Proteins / metabolism
  • Humans
  • Interferon Regulatory Factor-3 / immunology
  • Interferon Regulatory Factor-3 / metabolism*
  • Interferon Type I / immunology
  • Interferon Type I / metabolism
  • Membrane Proteins / metabolism
  • Mice
  • Mice, Knockout
  • Mice, Mutant Strains
  • NF-kappa B / metabolism
  • Nerve Tissue Proteins / metabolism
  • Receptors, Cell Surface
  • Rhabdoviridae Infections / immunology*
  • Rhabdoviridae Infections / virology
  • Signal Transduction
  • TNF Receptor-Associated Death Domain Protein / metabolism*
  • TNF Receptor-Associated Factor 3 / immunology
  • TNF Receptor-Associated Factor 3 / metabolism
  • Ubiquitin-Protein Ligases / metabolism
  • Vesiculovirus / immunology*
  • Vesiculovirus / physiology


  • Adaptor Proteins, Signal Transducing
  • Fadd protein, mouse
  • Fas-Associated Death Domain Protein
  • GTPase-Activating Proteins
  • IRF3 protein, human
  • Interferon Regulatory Factor-3
  • Interferon Type I
  • Membrane Proteins
  • NF-kappa B
  • Nerve Tissue Proteins
  • Ralbp1 protein, mouse
  • Receptors, Cell Surface
  • Robo3 protein, mouse
  • TNF Receptor-Associated Death Domain Protein
  • TNF Receptor-Associated Factor 3
  • Tank protein, mouse
  • Ubiquitin-Protein Ligases
  • DNA Helicases