| 2004 |
TRAF7 was identified as a novel TRAF family member containing a RING finger domain, zinc finger domain, and seven WD40 repeats. It specifically interacted with MEKK3 and potentiated MEKK3-mediated AP1 and CHOP activation; depletion by antisense RNA inhibited this activation. Overexpression induced caspase-dependent apoptosis. Domain mapping showed TRAF7 uses distinct domains for MEKK3 signaling versus apoptosis induction. |
Co-immunoprecipitation, antisense RNA depletion, overexpression with reporter assays, domain mapping, caspase activity assays |
The Journal of biological chemistry |
High |
15001576
|
| 2005 |
TRAF7 binds to the DNA-binding domain of c-Myb via its WD40 repeats and stimulates sumoylation of c-Myb at Lys-523 and Lys-499 (same sites as PIASy-induced sumoylation). TRAF7 has E3 ubiquitin ligase activity for self-ubiquitination. TRAF7 inhibited c-Myb-induced transactivation dependent on sumoylation sites. Overexpressed TRAF7 localizes to the cytoplasm and sequesters c-Myb and SUMO1 there, thereby negatively regulating c-Myb activity. |
Co-immunoprecipitation, domain mapping, sumoylation assay, transcriptional reporter assay, immunofluorescence/subcellular fractionation, mutagenesis of sumoylation sites |
Molecular biology of the cell |
High |
16162816
|
| 2005 |
Activation of TLR2 signaling induces activation of IKKs-IκBα and MKK3/6-p38 pathways not only through TRAF6 but also through TRAF7. CYLD tumor suppressor acts as a negative regulator of both TRAF6 and TRAF7, likely via a deubiquitination-dependent mechanism, forming an autoregulatory feedback loop controlling NF-κB-dependent inflammatory responses. |
Overexpression, reporter assays for NF-κB and p38 activation, TLR2 ligand stimulation (PGN, MALP-2, Pam3CSK4), cytokine measurement |
The Journal of biological chemistry |
Medium |
16230348
|
| 2011 |
TRAF7 physically associates with NEMO (IKKγ) and p65/RelA. TRAF7 promotes Lys-29-linked polyubiquitination of both NEMO and p65, leading to their lysosomal degradation and repression of NF-κB transcriptional activity. TRAF7 also influences p65 nuclear distribution and promotes cell death. |
Co-immunoprecipitation, ubiquitination assays with K29-linkage-specific analysis, lysosomal inhibitor experiments, microarray expression analysis, cell death assays |
The Journal of biological chemistry |
High |
21518757
|
| 2010 |
Traf7 is a direct transcriptional target of MyoD1 in muscle cells. Traf7 depletion accelerates myogenesis partly through downregulation of NF-κB activity. NEMO was identified as a Traf7-interacting protein by proteomic screen, and ubiquitylation of NEMO is regulated exclusively by Traf7 activity in myoblasts, coupling MyoD1 function to NF-κB activity. |
ChIP (MyoD1 binding to Traf7 promoter), siRNA depletion with myogenic differentiation assays, proteomic/co-IP screen identifying NEMO, ubiquitylation assays in myoblasts |
EMBO reports |
High |
20948544
|
| 2017 |
Expression of mutant (but not wild-type) TRAF7 in vitro led to increased phosphorylation of NF-κB and increased expression of L1CAM, a marker of NF-κB pathway activation, demonstrating that adenomatoid tumor-associated TRAF7 WD40 domain mutations drive aberrant NF-κB pathway activation. |
In vitro expression of wild-type vs. mutant TRAF7, Western blot for p-NF-κB and L1CAM, immunohistochemistry |
Modern pathology |
Medium |
29148537
|
| 2019 |
TRAF7 interacts with KLF4 protein via its N-terminus and promotes ubiquitin-mediated proteasomal degradation of KLF4, thereby promoting HCC cell migration and invasion. Restoration of KLF4 abrogated TRAF7-induced cell motility. |
Co-immunoprecipitation, ubiquitination assay, KLF4 overexpression rescue, migration/invasion assays in vitro and in vivo |
Cancer letters |
Medium |
31730901
|
| 2019 |
Robo4 binds to TRAF7 through interaction with the C-terminus of Robo4 in endothelial cells. TRAF7 is required for Robo4-mediated suppression of TNFα-induced vascular hyperpermeability and stabilization of VE-cadherin at cell junctions. Loss of TRAF7 abrogates Robo4's protective function, and Robo4-/- mice show increased vascular leakage and mortality in endotoxemia. |
Co-immunoprecipitation, deletion assays, gain- and loss-of-function studies, Robo4 knockout mouse endotoxemia model, permeability assays, VE-cadherin localization |
Journal of cell science |
High |
30510113
|
| 2021 |
TRAF7 loss-of-function mutations disrupt either its catalytic E3 ligase activity or its interaction with RAS GTPases. TRAF7 acts as a proteostatic regulator of RAS-related small GTPases; TRAF7 loss in meningeal cells alters actin dynamics and promotes anchorage-independent growth by inducing CDC42 and RAS signaling. KLF4 loss of function disrupts a negative feedback loop (TRAF7-loss-driven RAS/MAPK pathway activates KLF4-dependent transcription of the Semaphorin pathway) and enhances TRAF7 mutant-mediated cell transformation. |
TRAF7 ubiquitinome and proteome analysis, interactome mapping, in vitro meningioma model from primary meningeal cells, genetic epistasis, actin dynamics assays, anchorage-independent growth assays |
Cancer research |
High |
34215617
|
| 2021 |
TRAF7 directly interacted with MEKK3 in neuronal/glial cells. Brain-specific TRAF7 deletion ameliorated neuronal death and neuroinflammation after TBI. MEKK3 overexpression abrogated the protective effects of TRAF7 knockout, establishing TRAF7 upstream of MEKK3 in NF-κB and MAPK signaling in brain. |
Brain-specific conditional knockout mice, Co-immunoprecipitation of TRAF7-MEKK3, MEKK3 overexpression rescue, primary cortical neuron/glial OGD/R model, cytokine measurement, NF-κB/MAPK pathway analysis |
International immunopharmacology |
Medium |
34953447
|
| 2021 |
TRAF7 promotes ubiquitin-proteasome-mediated degradation of p53 at K48 site in hepatocellular carcinoma cells. Physical interaction between TRAF7 and p53 was identified. TRAF7's pro-tumorigenic functions (inhibiting apoptosis, promoting proliferation/invasion) depended on p53 in rescue assays. |
Co-immunoprecipitation, ubiquitination assay specifying K48-linkage, rescue assays with p53, overexpression/knockdown with cell phenotype assays |
Cell death discovery |
Medium |
34775479
|
| 2023 |
TRAF7 interacts with TBK1 and promotes K48-linked polyubiquitination and proteasomal degradation of TBK1 through its RING domain, impairing IRF3 activation and IFN-β production. The conserved cysteine at position 131 of TRAF7 is necessary for this function. TRAF7 knockout facilitated IRF3 activation and increased antiviral gene transcription. |
Co-immunoprecipitation, K48-specific ubiquitination assay, TRAF7 RING domain mutagenesis (C131 mutation), TRAF7 knockout cells, IRF3 activation assays, IFN-β reporter assay |
Virologica Sinica |
High |
37086853
|
| 2023 |
Targeted deletion of TRAF7 in mice is embryonic lethal due to impaired endothelium integrity, similar to Mekk3-, Mek5- or Erk5-deficient mice, with significantly lower expression of KLF2 downstream of MEKK3-MEK5-ERK5. TRAF7 associates with SCRIB (planar cell polarity protein) via its N-terminal region, while MEKK3 associates with the C-terminal WD40 domain. SCRIB and TRAF7 together mediate fluid shear stress-induced ERK5 phosphorylation in endothelial cells. |
Conditional knockout mouse (embryonic and endothelial-specific), Co-immunoprecipitation domain mapping of TRAF7-SCRIB and TRAF7-MEKK3, shear stress assays in cultured endothelial cells, ERK5/KLF2 Western blotting |
iScience |
High |
37583551
|
| 2023 |
TRAF7 mutants (associated with meningioma/congenital heart defects) operate in a dominant-negative manner by heterodimerizing with wild-type TRAF7 protein. Somatic and inherited TRAF7 mutations disrupt TRAF7-IFT57 interactions, leading to cilia degradation. TRAF7 knockdown in Xenopus and zebrafish caused cardiac, craniofacial, and ciliary defects. TRAF7-mutant meningioma primary cultures lack cilia. |
Heterodimerization assay (dominant-negative mechanism), Co-IP of TRAF7-IFT57, primary culture ciliogenesis assay, TRAF7 morpholino knockdown in Xenopus and zebrafish |
Proceedings of the National Academy of Sciences of the United States of America |
High |
37043537
|
| 2024 |
TRAF7 is an E3 ligase that forms a complex with E2 enzymes UBE2G1 and/or UBE2T to promote K48-linked polyubiquitination and proteasomal degradation of the circadian transcription factor DBP. TRAF7 knockout in NIH3T3 cells impairs time-of-day-dependent regulation of DBP levels, and TRAF7 overexpression shortens the circadian period. |
Proteomic analysis of DBP-interacting proteins, dominant-negative E2 screen (19 variants), Co-IP of TRAF7-UBE2G1/UBE2T-DBP complex, K48-specific ubiquitination assay, TRAF7 knockout in NIH3T3, circadian period assay |
Communications biology |
High |
39379486
|
| 2024 |
TRAF7 interacts with KLF4 and promotes its ubiquitin-mediated degradation. H2S S-sulfhydrates TRAF7 at Cys327, which weakens the TRAF7-KLF4 interaction and reduces ubiquitination of KLF4, thereby stabilizing KLF4 and upregulating VE-cadherin to protect endothelial barrier integrity. A TRAF7-Cys327 mutant mimicking S-sulfhydration recapitulated these protective effects. |
S-sulfhydration assay, Co-immunoprecipitation, ubiquitination assay, TRAF7-Cys327 mutagenesis, VE-cadherin expression/localization, endothelial permeability assay |
Free radical biology & medicine |
High |
38479633
|
| 2024 |
The C. trachomatis effector Tri1 specifically interacts with TRAF7 during infection, recruits TRAF7 to the Chlamydia inclusion, and displaces native TRAF7 binding partners MEKK2 and MEKK3. The Tri1 coiled-coil domain is necessary for interaction with the TRAF7 WD40 domain. These findings confirm MEKK2 and MEKK3 as endogenous TRAF7 WD40-binding partners. |
Co-affinity purification, immunofluorescence confocal imaging, proteomics, domain deletion assays, infection-based interaction studies |
Microbiology spectrum |
Medium |
38814079
|
| 2025 |
TRAF7 interacts with SOX12 protein and promotes K48-linked ubiquitination-mediated proteasomal degradation of SOX12 in esophageal squamous cell carcinoma cells. TRAF7's inhibitory effects on tumor cell proliferation and migration partly depended on SOX12, as shown by rescue experiments. |
Co-immunoprecipitation, K48-specific ubiquitination assay, rescue assay with SOX12 overexpression, cell proliferation and migration assays |
Biochemistry and cell biology |
Medium |
40623321
|
| 2018 |
In vitro analyses of de novo germline TRAF7 missense mutations found in patients with developmental delay and congenital anomalies showed reduced ERK1/2 phosphorylation, indicating that TRAF7 promotes ERK1/2 signaling under normal conditions. |
In vitro expression of patient-derived TRAF7 mutants, Western blot for ERK1/2 phosphorylation |
American journal of human genetics |
Low |
29961569
|