T3JAM, a novel protein that specifically interacts with TRAF3 and promotes the activation of JNK(1).
Previous studies suggest that localization of tumor necrosis factor receptor (TNFR)-associated factor (TRAF) family members is important for regulating their signal transduction. During a screen for TRAF3-associated proteins that potentially alter TRAF3 subcellular localization and enable signal transduction, we identified a novel protein, T3JAM (TRAF3-interacting Jun N-terminal kinase (JNK)-activating modulator). This protein associates specifically with TRAF3 but not other TRAF family members. Coexpression of T3JAM with TRAF3 recruits TRAF3 to the detergent-insoluble fraction. More importantly, T3JAM and TRAF3 synergistically activate JNK but not nuclear factor (NF)-kappaB. Our studies indicate that T3JAM may function as an adapter molecule that specifically regulates TRAF3-mediated JNK activation.
Medical Scientist Training Program, University of California Los Angeles, Los Angeles, CA 90095, USA.
Hajir
H
Dadgostar
Sean E
SE
Doyle
Arash
A
Shahangian
Daniel E
DE
Garcia
Genhong
G
Cheng
D000595:Amino Acid Sequence; D000818:Animals; D002460:Cell Line; D004789:Enzyme Activation; D006801:Humans; D048031:JNK Mitogen-Activated Protein Kinases; D051379:Mice; D008810:Mice, Inbred C57BL; D008869:Microtubule-Associated Proteins / Q000378:metabolism*; D020928:Mitogen-Activated Protein Kinases / Q000378:metabolism*; D008969:Molecular Sequence Data; D009928:Organ Specificity; D017434:Protein Structure, Tertiary; D011506:Proteins / Q000378:metabolism*; D018124:Receptors, Tumor Necrosis Factor / Q000378:metabolism; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction; D013347:Subcellular Fractions / Q000378:metabolism; D013379:Substrate Specificity; D048008:TNF Receptor-Associated Factor 3; D014162:Transfection; D020798:Two-Hybrid System Techniques
D008869:Microtubule-Associated Proteins; D011506:Proteins; D018124:Receptors, Tumor Necrosis Factor; D048008:TNF Receptor-Associated Factor 3; C412724:TRAF3IP1 protein, human; D048031:JNK Mitogen-Activated Protein Kinases; D020928:Mitogen-Activated Protein Kinases