FEATURES

FAMILY

DESCRIPTION

Also known as TRAF2_HUMAN, TRAF2, TRAP3. Regulates activation of NF-kappa-B and JNK and plays a central role in the regulation of cell survival and apoptosis. Required for normal antibody isotype switching from IgM to IgG. Has E3 ubiquitin-protein ligase activity and promotes 'Lys-63'-linked ubiquitination of target proteins, such as BIRC3, RIPK1 and TICAM1. Is an essential constituent of several E3 ubiquitin-protein ligase complexes, where it promotes the ubiquitination of target proteins by bringing them into contact with other E3 ubiquitin ligases. Regulates BIRC2 and BIRC3 protein levels by inhibiting their autoubiquitination and subsequent degradation; this does not depend on the TRAF2 RING-type zinc finger domain. Plays a role in mediating activation of NF-kappa-B by EIF2AK2/PKR. In complex with BIRC2 or BIRC3, promotes ubiquitination of IKBKE. Homotrimer (PubMed:8069916). Heterotrimer with TRAF1 (PubMed:8069916). Heterotrimer with TRAF3 (via TRAF domain) (PubMed:15383523, PubMed:20447407). The domain containing the RING-type and the first TRAF-type zinc finger can also form homodimers (in vitro) (PubMed:19810754). Interacts with TNFRSF1B/TNFR2 (PubMed:7639698, PubMed:8069916, PubMed:10206649). Interacts with TNFRSF5/CD40 (PubMed:9718306). Interacts with TNFRSF4, TNFRSF7/CD27, TNFRSF8/CD30, TNFRSF9/CD137, TNFRSF11A/RANK, TNFRSF13B/TACI, TNFRSF14, TNFRSF16/NGFR, TNFRSF17/BCMA, TNFRSF18/AITR, TNFRSF19/TROY, TNFRSF19L/RELT and EDAR (PubMed:8627180, PubMed:9153189, PubMed:9692890, PubMed:9488716, PubMed:9774460, PubMed:9607925, PubMed:9418902, PubMed:10037686, PubMed:10514511, PubMed:10809768, PubMed:10880535, PubMed:11035039, PubMed:10411888). Stimulation of TNF-alpha receptor TNFRSF1A leads to the formation of two distinct signaling complexes. Plasma membrane-bound complex I is composed of TNFRSF1A, TRADD, RIPK1, TRAF2 and BIRC2/c-IAP1 or BIRC3 which interacts with CHUCK/IKK-alpha, IKBKB/IKK-beta and IKBKG/IKK-gamma promoting cell survival (PubMed:21307340, PubMed:18981220). Subsequently, TRADD, RIPK1 and TRAF2 dissociate from TNFRSF1A and form cytoplasmic complex II with FADD and caspase CASP8 promoting cell apoptosis (PubMed:21307340). Interacts with TRADD (PubMed:10892748). Identified in a complex with TNFRSF1A, RIPK1 and IKBKB/IKK-beta (PubMed:18981220). Interacts with RIPK2 (PubMed:9705938). Interacts with BIRC2 and BIRC3 N-terminus; a single BIRC2 or BIRC3 molecule interacts with a heterotrimer formed by TRAF1 and TRAF2, or a TRAF2 homotrimer (PubMed:11907583, PubMed:19506082, PubMed:20447407, PubMed:20385093). Identified in a complex composed of TRAF2, TRAF3, BIRC2 and BIRC3 (By similarity). Interacts with BIRC2; the interaction promotes BIRC2 stability (PubMed:19506082). Interaction with BIRC2 and/or BIRC3 is essential for ubiquitination of IKBKE, degradation of NFKBIA and activation of NF-kappa-B (By similarity). Within complex I, phosphorylated TRAF2 interacts (via 'Lys-63'-linked polyubiquitin chains) with CHUCK/IKK-alpha, IKBKB/IKK-beta, IKBKG/IKK-gamma TAB2, TAB3 and TAK1 in response to TNF-alpha stimulation (PubMed:19150425). Within complex I, interacts with UXT isoform 1 (via TPQE motif); the interaction prevents the recruitment of FADD and CASP8/caspase 8 to complex I (PubMed:21307340). Forms a complex composed of TNFRSF8/CD30 or TNFRSF1B/TNFR2, and TRAF1, TRAF2 and E3 ligase TRAIP (PubMed:9104814). Within the complex, interacts with TRAIP; the interaction inhibits TRAF2-mediated NF-kappa B activation (PubMed:9104814). Component of a complex composed of TANK and TBK1 (PubMed:10581243). Interacts with TRPC4AP (By similarity). Interacts with MAP3K1/MEKK1, MAP3K5/ASK1 and MAP3K11/MLK3 in response to TNF-alpha stimulation; the interaction leads to JNK activation (PubMed:10346818, PubMed:19918265, PubMed:9774977). Component of a complex composed of MAP3K14/NIK BIRC3 and TRAF3; the interaction leads to BIRC2/3-mediated ubiquitination of TRAF3 upon CD40 engagement in a TRAF2-dependent manner (By similarity). Interacts with MAP3K14/NIK in response to TNF-alpha stimulation; the interaction leads to NF-kappa B activation (PubMed:9020361). Interacts with PEG3; the interaction may promote TRAF2-mediated NF-kappa B activation (By similarity). Interacts with HIVEP3; the interaction may inhibit TNF-alpha-TRAF2-mediated NF-kappa B and JNK activation (By similarity). Interacts with TANK/ITRAF; the interaction prevents interaction between TNFRSF1B/TNFR2 and TRAF2 (PubMed:8710854). Interacts with deubiquitinating enzyme CYLD; the interaction results in the deubiquitination and inactivation of TRAF2 (PubMed:12917691). Interacts with SIAH2; the interaction leads to TRAF2 ubiquitination and degradation (PubMed:12411493). Interacts with E2 conjugating enzyme UBE2N/Ubc13, E3 ligase ITCH and RNF11 in response to TNF-alpha stimulation (By similarity). Interacts with ubiquitin-ed

EXTERNAL LINKS

TRAF2

Mutations

Mutation(s) distribution

Mutations table