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TNF receptor-associated factor 4 (TRAF4) also known as RING finger protein 83 (RNF83) is a protein that in humans is encoded by the TRAF4 gene.[1][2][3]

TRAF4 is a member of the TNF receptor associated factor (TRAF) family, a family of scaffold proteins.[4] TRAF proteins connect IL-1R/Toll and TNF receptors with signaling factors that lead to the activation of NF-κB and mitogen-activated protein kinases. However, TRAF4 is not known to interact with TNF receptors and its cellular functions are not well understood.[5]

Protein interactions

TRAF4 has been shown to interact with neurotrophin receptor, p75 (NTR/NTSR1),[6][7] and negatively regulate NTR induced cell death and NF-kappa B activation. This protein has been found to bind to p47phox, a cytosolic regulatory factor included in a multi-protein complex known as NAD(P)H oxidase. This protein thus, is thought to be involved in the oxidative activation of MAPK8/JNK. Alternatively spliced transcript variants have been observed but the full-length nature of only one has been determined.[3]

A recent report indicates that TRAF4 binds to NOD-Like Receptors NOD1 and NOD2, and specifically inhibits activation of NF-κB by the activated NOD2-RIP2 complex [8]


  1. Regnier CH, Tomasetto C, Moog-Lutz C, Chenard MP, Wendling C, Basset P, Rio MC (Dec 1995). "Presence of a new conserved domain in CART1, a novel member of the tumor necrosis factor receptor-associated protein family, which is expressed in breast carcinoma". J Biol Chem. 270 (43): 25715–21. doi:10.1074/jbc.270.43.25715. PMID 7592751.
  2. Tomasetto C, Regnier C, Moog-Lutz C, Mattei MG, Chenard MP, Lidereau R, Basset P, Rio MC (Jan 1996). "Identification of four novel human genes amplified and overexpressed in breast carcinoma and localized to the q11-q21.3 region of chromosome 17". Genomics. 28 (3): 367–76. doi:10.1006/geno.1995.1163. PMID 7490069.
  3. 3.0 3.1 "Entrez Gene: TRAF4 TNF receptor-associated factor 4".
  4. Wajant H, Henkler F, Scheurich P (June 2001). "The TNF-receptor-associated factor family: scaffold molecules for cytokine receptors, kinases and their regulators". Cell. Signal. 13 (6): 389–400. doi:10.1016/S0898-6568(01)00160-7. PMID 11384837.
  5. Kedinger V, Rio MC (2007). "TRAF4, the unique family member". Adv. Exp. Med. Biol. Advances in Experimental Medicine and Biology. 597: 60–71. doi:10.1007/978-0-387-70630-6_5. ISBN 978-0-387-70629-0. PMID 17633017.
  6. Ye X, Mehlen P, Rabizadeh S, VanArsdale T, Zhang H, Shin H, Wang JJ, Leo E, Zapata J, Hauser CA, Reed JC, Bredesen DE (October 1999). "TRAF family proteins interact with the common neurotrophin receptor and modulate apoptosis induction". J. Biol. Chem. 274 (42): 30202–8. doi:10.1074/jbc.274.42.30202. PMID 10514511.
  7. Krajewska M, Krajewski S, Zapata JM, Van Arsdale T, Gascoyne RD, Berern K, McFadden D, Shabaik A, Hugh J, Reynolds A, Clevenger CV, Reed JC (June 1998). "TRAF-4 expression in epithelial progenitor cells. Analysis in normal adult, fetal, and tumor tissues". Am. J. Pathol. 152 (6): 1549–61. PMC 1858434. PMID 9626059.
  8. Marinis JM, Homer CR, McDonald C, Abbott DW (2011). "A Novel Motif in the Crohn's Disease Susceptibility Protein, NOD2, Allows TRAF4 to Down-regulate Innate Immune Responses". J. Biol. Chem. 286 (3): 1938–1950. doi:10.1074/jbc.M110.189308. PMC 3023490. PMID 21097508.

Further reading