PUBLICATION
Zebrafish mylipb attenuates antiviral innate immunity through two synergistic mechanisms targeting transcription factor irf3
- Authors
- Li, Z., Li, J., Li, Z., Song, Y., Wang, Y., Wang, C., Yuan, L., Xiao, W., Wang, J.
- ID
- ZDB-PUB-240514-5
- Date
- 2024
- Source
- PLoS pathogens 20: e1012227e1012227 (Journal)
- Registered Authors
- Wang, Jing, Xiao, Wuhan
- Keywords
- none
- MeSH Terms
-
- Animals
- Autophagy/immunology
- Humans
- Immunity, Innate*
- Interferon Regulatory Factor-3*/metabolism
- Phosphorylation
- Rhabdoviridae Infections/immunology
- Ubiquitination
- Zebrafish*
- Zebrafish Proteins*/genetics
- Zebrafish Proteins*/metabolism
- PubMed
- 38739631 Full text @ PLoS Pathog.
Citation
Li, Z., Li, J., Li, Z., Song, Y., Wang, Y., Wang, C., Yuan, L., Xiao, W., Wang, J. (2024) Zebrafish mylipb attenuates antiviral innate immunity through two synergistic mechanisms targeting transcription factor irf3. PLoS pathogens. 20:e1012227e1012227.
Abstract
IFN regulatory factor 3 (IRF3) is the transcription factor crucial for the production of type I IFN in viral defence and inflammatory responses. The activity of IRF3 is strictly modulated by post-translational modifications (PTMs) to effectively protect the host from infection while avoiding excessive immunopathology. Here, we report that zebrafish myosin-regulated light chain interacting protein b (mylipb) inhibits virus-induced type I IFN production via two synergistic mechanisms: induction of autophagic degradation of irf3 and reduction of irf3 phosphorylation. In vivo, mylipb-null zebrafish exhibit reduced lethality and viral mRNA levels compared to controls. At the cellular level, overexpression of mylipb significantly reduces cellular antiviral capacity, and promotes viral proliferation. Mechanistically, mylipb associates with irf3 and targets Lys 352 to increase K6-linked polyubiquitination, dependent on its E3 ubiquitin ligase activity, leading to autophagic degradation of irf3. Meanwhile, mylipb acts as a decoy substrate for the phosphokinase tbk1 to attenuate irf3 phosphorylation and cellular antiviral responses independent of its enzymatic activity. These findings support a critical role for zebrafish mylipb in the limitation of antiviral innate immunity through two synergistic mechanisms targeting irf3.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping