
| 10.4049/jimmunol.1301601
http://scihub22266oqcxt.onion/10.4049/jimmunol.1301601
 24929003!�!24929003
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J+Immunol 2014 ; 193 (2): 840-8 Nephropedia Template TP
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DOK3 is required for IFN-beta production by enabling TRAF3/TBK1 complex formation and IRF3 activation #MMPMID24929003Kim SS; Lee KG; Chin CS; Ng SK; Pereira NA; Xu S; Lam KPJ Immunol 2014[Jul]; 193 (2): 840-8 PMID24929003show ga
The downstream of kinase (DOK) family of adaptors is generally involved in the negative regulation of signaling pathways. DOK1, 2, and 3 were shown to attenuate TLR4 signaling by inhibiting Ras-ERK activation. In this study, we elucidated a novel role for DOK3 in IFN-beta production. Macrophages lacking DOK3 were impaired in IFN-beta synthesis upon influenza virus infection or polyinosinic-polyribocytidylic acid stimulation. In the absence of DOK3, the transcription factor IFN regulatory factor 3 was not phosphorylated and could not translocate to the nucleus to activate ifn-beta gene expression. Interestingly, polyinosinic-polyribocytidylic acid-induced formation of the upstream TNFR-associated factor (TRAF) 3/TANK-binding kinase (TBK) 1 complex was compromised in dok3(-/-) macrophages. DOK3 was shown to bind TBK1 and was required for its activation. Furthermore, we demonstrated that overexpression of DOK3 and TBK1 could significantly enhance ifn-beta promoter activity. DOK3 was also shown to bind TRAF3, and the binding of TRAF3 and TBK1 to DOK3 required the tyrosine-rich C-terminal domain of DOK3. We further revealed that DOK3 was phosphorylated by Bruton's tyrosine kinase. Hence, DOK3 plays a critical and positive role in TLR3 signaling by enabling TRAF3/TBK1 complex formation and facilitating TBK1 and IFN regulatory factor 3 activation and the induction of IFN-beta production.|Adaptor Proteins, Signal Transducing/genetics/*metabolism[MESH]|Animals[MESH]|Blotting, Western[MESH]|Cells, Cultured[MESH]|Gene Expression[MESH]|HEK293 Cells[MESH]|Host-Pathogen Interactions[MESH]|Humans[MESH]|Interferon Regulatory Factor-3/genetics/*metabolism[MESH]|Interferon-beta/genetics/*metabolism[MESH]|Macrophages/cytology/metabolism/virology[MESH]|Mice[MESH]|Mice, Inbred C57BL[MESH]|Mice, Knockout[MESH]|Microscopy, Confocal[MESH]|Orthomyxoviridae/physiology[MESH]|Phosphorylation/drug effects[MESH]|Poly I-C/pharmacology[MESH]|Promoter Regions, Genetic/genetics[MESH]|Protein Binding[MESH]|Protein Serine-Threonine Kinases/genetics/*metabolism[MESH]|Reverse Transcriptase Polymerase Chain Reaction[MESH]|Signal Transduction/drug effects/genetics[MESH]|TNF Receptor-Associated Factor 3/genetics/*metabolism[MESH]
  
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