TNF receptor-associated factor 5 (TRAF5)

TNF receptor-associated factor 5 (TRAF5) is an intracellular adaptor and signal transducer protein that links members of the tumor necrosis factor (TNF) receptor superfamily to downstream signaling pathways[1][7]. It contains a meprin and TRAF homology (MATH) domain, a RING-type zinc finger domain, and two TRAF-type zinc fingers, which contribute to its function in protein-protein interactions and signal transduction[1][2]. TRAF5 is particularly expressed in lymphocytes (B and T cells) and mediates activation of key immune signaling cascades such as NF-κB and MAP kinase pathways in response to stimulation of TNF receptor family members, including CD40, CD27, and GITR[3][5]. It can have both positive and negative regulatory effects: it promotes lymphocyte survival and proliferation through TNFR family signaling but suppresses excessive inflammatory signaling through Toll-like receptors (TLRs) and IL-6 receptor pathways[3][5]. Genetic variants and altered expression of TRAF5 are implicated in a range of inflammatory and autoimmune diseases (such as rheumatoid arthritis and lupus), as well as certain cancers, but no approved therapeutic agents directly target TRAF5 at present[7][5][3].

Other names

TRAF5RNF84RING finger protein 84MGC:39780

No explicit drugs directly target TRAF5; generally, drugs targeting pathways upstream or downstream, such as TNF signaling, may indirectly affect TRAF5 function.