The cytokine TNF can trigger highly proinflammatory RIPK1-dependent cell death. Here, we show that the two adapter proteins, TANK and AZI2, suppress TNF-induced cell death by regulating the activation of TBK1 kinase. Mice lacking either TANK or AZI2 do not show an overt phenotype. Conversely, animals deficient in both adapters are born in a sub-Mendelian ratio and suffer from severe multi-organ inflammation, excessive antibody production, male sterility, and early mortality, which can be rescued by TNFR1 deficiency and significantly improved by expressing a kinase-dead form of RIPK1. Mechanistically, TANK and AZI2 both recruit TBK1 to the TNF receptor signaling complex, but with distinct kinetics due to interaction with different complex components. While TANK binds directly to the adapter NEMO, AZI2 is recruited later via deubiquitinase A20. In summary, our data show that TANK and AZI2 cooperatively sustain TBK1 activity during different stages of TNF receptor assembly to protect against autoinflammation.
- MeSH
- adaptorové proteiny signální transdukční * metabolismus genetika MeSH
- buněčná smrt MeSH
- endopeptidasy MeSH
- intracelulární signální peptidy a proteiny metabolismus genetika MeSH
- lidé MeSH
- myši inbrední C57BL MeSH
- myši knockoutované * MeSH
- myši MeSH
- protein-serin-threoninkinasy interagující s receptory * metabolismus genetika MeSH
- protein-serin-threoninkinasy * metabolismus genetika MeSH
- receptory TNF - typ I * metabolismus genetika MeSH
- signální transdukce MeSH
- TNF-alfa * metabolismus MeSH
- TNFAIP3 metabolismus genetika MeSH
- zánět metabolismus MeSH
- zvířata MeSH
- Check Tag
- lidé MeSH
- mužské pohlaví MeSH
- myši MeSH
- ženské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
