TRAF3IP2 encodes an E3 ubiquitin ligase that serves as a crucial adapter molecule in IL-17A-mediated signaling pathways 1. The protein catalyzes Lys-63-linked polyubiquitination of target proteins, particularly TRAF6, which leads to activation of NF-κB and MAPK pathways essential for inflammatory responses 1. TRAF3IP2 interacts with IL-17 receptor chains through SEFIR domains and is required for proper IL-17A signaling, making it vital for immune system function 12. The gene shows significant disease relevance, with mutations associated with familial candidiasis and psoriasis 3. Genetic variants in TRAF3IP2 contribute to susceptibility for multiple autoimmune conditions including systemic lupus erythematosus, where specific polymorphisms increase disease risk and pericarditis development 4. The gene is also associated with Behçet's disease, Vogt-Koyanagi-Harada syndrome, and autoimmune thyroid diseases 56. In ulcerative colitis, TRAF3IP2 mutations are frequently selected for their ability to downregulate IL-17 and pro-inflammatory signals 7. Additionally, the antisense RNA TRAF3IP2-AS1 regulates necroptosis in pancreatic cancer, influencing metastatic potential 8.