Suppression of Type I Interferon Signaling by Flavivirus NS5.
- Author(s): Thurmond, Stephanie;
- Wang, Boxiao;
- Song, Jikui;
- Hai, Rong
- et al.
Published Web Locationhttps://doi.org/10.3390/v10120712
Type I interferon (IFN-I) is the first line of mammalian host defense against viral infection. To counteract this, the flaviviruses, like other viruses, have encoded a variety of antagonists, and use a multi-layered molecular defense strategy to establish their infections. Among the most potent antagonists is non-structural protein 5 (NS5), which has been shown for all disease-causing flaviviruses to target different steps and players of the type I IFN signaling pathway. Here, we summarize the type I IFN antagonist mechanisms used by flaviviruses with a focus on the role of NS5 in regulating one key regulator of type I IFN, signal transducer and activator of transcription 2 (STAT2).