| 1999 |
ECSIT is a cytosolic adaptor protein that bridges TRAF6 to MEKK-1 in the Toll/IL-1 signaling pathway, and acts as a regulator of MEKK-1 processing; wild-type ECSIT accelerates MEKK-1 processing while a dominant-negative fragment blocks MEKK-1 processing and NF-κB activation. |
Co-immunoprecipitation, dominant-negative overexpression, NF-κB reporter assays |
Genes & development |
High |
10465784
|
| 2007 |
ECSIT localizes to mitochondria via an N-terminal targeting signal, where it interacts with the assembly chaperone NDUFAF1 in 500–850 kDa complexes; RNAi knockdown of ECSIT severely impairs mitochondrial complex I assembly and function. |
Affinity purification, reciprocal RNAi knockdowns, subcellular fractionation, blue native PAGE |
Genes & development |
High |
17344420
|
| 2003 |
ECSIT is essential for BMP signaling during mouse embryogenesis; it constitutively associates with Smad4 and associates with Smad1 in a BMP-inducible manner, and together with Smad1/Smad4 binds to the promoters of specific BMP target genes. |
Targeted null mutation (knockout mouse), co-immunoprecipitation, chromatin immunoprecipitation, shRNA knockdown |
Genes & development |
High |
14633973
|
| 2014 |
Upon LPS stimulation, ECSIT forms a high-molecular-weight endogenous complex with TAK1 and TRAF6; ECSIT interacts with each protein and regulates TAK1 activity to activate NF-κB, and ECSIT mutants lacking specific interaction domains for TAK1 or TRAF6 cannot restore NF-κB activation. |
Co-immunoprecipitation of endogenous proteins, shRNA knockdown, domain-deletion mutagenesis, NF-κB reporter assays, cytokine measurement |
The Journal of biological chemistry |
High |
25371197
|
| 2014 |
ECSIT ubiquitination at lysine 372 (K372) is required for its interaction with p65/p50 NF-κB proteins and their nuclear colocalization; K372A mutant ECSIT fails to interact with NF-κB subunits and cannot restore NF-κB DNA-binding activity or cytokine production in ECSIT-knockdown cells. |
Co-immunoprecipitation, site-directed mutagenesis (K372A), nuclear fractionation, NF-κB DNA-binding assay, shRNA knockdown rescue |
Molecular biology of the cell |
High |
25355951
|
| 2018 |
ECSIT deletion in macrophages causes complete disruption of complex I activity, loss of the CI holoenzyme and multiple subassemblies, shifts metabolism to glycolysis, and causes defective mitophagy; ECSIT associates with the mitophagy regulator PINK1 and undergoes Parkin-dependent ubiquitination. |
Conditional knockout mouse, Seahorse metabolic flux, blue native PAGE for complex assembly, co-immunoprecipitation with PINK1, ubiquitination assay |
Cell reports |
High |
29514094
|
| 2012 |
TRIM59 interacts with ECSIT as an adaptor protein in the TLR signaling pathway and negatively regulates NF-κB and IRF-3/7-mediated signaling; TRIM59 overexpression inhibits phosphorylation and dimerization of IRF3 and IRF7. |
Co-immunoprecipitation, luciferase reporter assay, shRNA knockdown, phosphorylation/dimerization analysis |
Biochemical and biophysical research communications |
Medium |
22588174
|
| 2014 |
ECSIT acts as an essential scaffolding protein bridging RIG-I and MDA5 to VISA (MAVS) on mitochondria, mediating virus-triggered type I IFN induction; overexpression potentiated IRF3 activation and IFNB1 expression, while knockdown impaired antiviral responses. |
Co-immunoprecipitation, overexpression, shRNA knockdown, IRF3 activation assay, IFNB1 expression analysis |
Journal of innate immunity |
Medium |
25228397
|
| 2017 |
Peroxiredoxin-6 (Prdx6) competitively interacts with ECSIT for TRAF6 binding via TRAF6's C-terminal TRAF-C domain, thereby disrupting the TRAF6-ECSIT complex and suppressing TLR4-induced mROS production and NF-κB activation. |
Co-immunoprecipitation, competitive binding assay, shRNA knockdown, mitochondrial ROS measurement, NF-κB reporter assay |
Frontiers in cellular and infection microbiology |
Medium |
28393051
|
| 2018 |
The ECSIT V140A mutation increases ECSIT's affinity for the S100A8/S100A9 heterodimer, leading to potentiated NF-κB activation and increased NADPH oxidase activity, triggering hyperinflammation in extranodal NK/T cell lymphoma. |
Exome sequencing, knock-in mouse model, co-immunoprecipitation, NADPH oxidase activity assay, NF-κB reporter assay, xenograft mouse model |
Nature medicine |
High |
29291352
|
| 2019 |
Cereblon (CRBN) disrupts the ECSIT-TRAF6 complex by interacting with ECSIT, thereby inhibiting TRAF6-induced ubiquitination of ECSIT and suppressing mROS production and bactericidal activity following TLR4 stimulation. |
Co-immunoprecipitation, ubiquitination assay, shRNA/CRISPR knockdown/knockout, mitochondrial ROS measurement, bacterial survival assay |
Frontiers in immunology |
Medium |
31620128
|
| 2019 |
p62 interacts with the internal domain of ECSIT, competitively inhibiting TRAF6-ECSIT complex formation and attenuating ECSIT ubiquitination, thereby negatively regulating TLR4-mediated NF-κB activation. |
Co-immunoprecipitation, p62 knockout MEF cells, ubiquitination assay, NF-κB activation assay, in vivo LPS challenge |
Immune network |
Medium |
31281713
|
| 2021 |
Human ECSIT is highly labile compared to murine ECSIT; low-level human ECSIT expression leads to reduced complex I assembly and activity, impaired oxidative phosphorylation, reduced ATP production, and severe cardiac hypertrophy with impaired mitophagy in aging humanized mice. |
Humanized knock-in mouse, Seahorse metabolic flux, complex I activity assay, mitochondrial fractionation, mitophagy assay, cardiomyocyte-specific conditional knockout |
JCI insight |
High |
34032637
|
| 2023 |
An ENU-induced N209I mutation in ECSIT causes tissue-specific defects in complex I assembly, with profound effects in heart tissue (loss of CI expression and assembly, hypertrophic cardiomyopathy) but not in other tissues, revealing tissue-specific requirements for ECSIT in complex I assembly. |
ENU mutagenesis mouse model, Seahorse extracellular flux, blue native PAGE, biochemical CI activity assay, histology |
Cardiovascular research |
High |
37395010
|
| 2023 |
ECSIT promotes RANKL-induced mitochondrial stimulation in osteoclasts via TRAF6 interaction and mitochondrial localization; RANKL promotes ECSIT-TRAF6 interaction and ECSIT mitochondrial translocation, while estradiol abrogates these effects; ECSIT silencing abolishes estrogen's anti-osteoclastogenic effects. |
Co-immunoprecipitation, subcellular fractionation, shRNA knockdown, Seahorse metabolic flux, complex I activity assay, ROS measurement, osteoclast differentiation assay |
Frontiers in endocrinology |
Medium |
37152948
|
| 2023 |
ECSIT loss in intestinal epithelium leads to metabolic reprogramming toward amino acid-based metabolism, demethylation and upregulation of eIF4F pathway genes, enhanced YAP protein translation, and transformation of intestinal cells to stem-like cells promoting tumorigenesis. |
Intestinal cell-specific ECSIT knockout mouse, metabolomics, methylation analysis, polysome profiling, Western blot, intestinal organoids |
Advanced science |
Medium |
37409430
|
| 2024 |
ECSIT mediates memory CD8+ T cell differentiation by controlling fumarate synthesis; ECSIT ablation in T cells causes loss of fumarate, leading to KDM5-mediated demethylation of the TCF-1 promoter and abrogation of TCF-1 expression, impairing memory CD8+ T cell development. |
T cell-specific ECSIT knockout, metabolomics (fumarate measurement), ChIP/methylation analysis, viral infection model, tumor models |
Nature cell biology |
High |
38326554
|
| 2025 |
A 42-kDa ECSIT isoform (ECSIT-X4) localizes to mitochondria of adult cardiomyocytes and interacts with STAT3, increasing mitochondrial STAT3 levels and serine 727 phosphorylation, thereby promoting mitochondrial bioenergetics and protecting against pressure overload-induced cardiac hypertrophy. |
AAV9-mediated gene therapy, cardiomyocyte-specific knockout mouse, co-immunoprecipitation with STAT3, mitochondrial fractionation, Seahorse metabolic flux, TAC surgical model |
Advanced science |
Medium |
39746855
|
| 2014 |
Hepatitis B virus X protein (HBx) augments IL-1β-induced NF-κB activation by directly interacting with ECSIT (via HBx aa 51-80); co-expression of HBx and ECSIT increases IKK and IκB phosphorylation, and ECSIT knockdown abolishes this augmentation. |
GST pulldown, co-immunoprecipitation, CytoTrap two-hybrid, deletion mutagenesis, siRNA knockdown, NF-κB reporter assay |
Virus research |
Medium |
25449573
|
| 2026 |
Mitochondria-targeted ECSIT overexpression promotes localization of the deubiquitinase OTUD3 to mitochondria; OTUD3 then stabilizes SIRT3 via deubiquitination, inhibiting mitochondrial DNA oxidation and alleviating metabolic disorders in MASH. |
Mitochondria-targeted ECSIT transgenic mice, co-immunoprecipitation, deubiquitination assay, HFHC/MCD diet MASH models, mitochondrial fractionation |
Advanced science |
Medium |
41640247
|
| 2025 |
Mycobacterium tuberculosis HBHA virulence factor binds directly to ECSIT, disrupting the ECSIT-TRAF6 complex and inhibiting ECSIT ubiquitination in BCG-infected macrophages, thereby suppressing autophagy and promoting intracellular mycobacterial persistence; ECSIT deficiency abolishes HBHA-mediated autophagy suppression. |
Direct binding assay, co-immunoprecipitation, ECSIT knockdown (RAW264.7), LC3-II/Beclin-1 autophagy assay, intracellular bacterial survival assay |
Frontiers in immunology |
Medium |
41209015
|
| 2026 |
ECSIT stabilizes the β-catenin complex and sustains Wnt signaling, regulating Lgr5+ intestinal stem cell proliferation and differentiation; intestinal epithelium-specific ECSIT knockout reduces β-catenin nuclear translocation and Lgr5 stem cell numbers, worsening chemotherapy-induced intestinal mucositis. |
Intestinal epithelium-specific ECSIT knockout mouse, Lgr5-specific inducible knockout, single-cell RNA-seq, β-catenin nuclear fractionation, ECSIT complementation rescue |
Life sciences |
Medium |
41611204
|