{"gene":"NFE2L3","run_date":"2026-04-29T11:37:56","timeline":{"discoveries":[{"year":1999,"finding":"NRF3 (NFE2L3) heterodimerizes with small Maf proteins (e.g., MafK) and the resulting complex binds to Maf recognition elements (MARE) in the chicken β-globin enhancer to activate transcription.","method":"In vitro transcription/translation, EMSA (bandshift), in vivo transfection assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 — in vitro binding and in vivo transcriptional activation assays, foundational paper with 252 citations","pmids":["10037736"],"is_preprint":false},{"year":2004,"finding":"NRF3 acts as a negative regulator of ARE-mediated NQO1 gene expression by associating with small Maf proteins to compete for ARE binding, requiring its heterodimerization and DNA-binding domains but not its transcriptional activation domain.","method":"Overexpression, deletion mutagenesis, EMSA/supershift, immunoprecipitation, RNA interference in HepG2 cells","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 — multiple orthogonal methods including mutagenesis, EMSA, RNAi, and endogenous gene readout","pmids":["15385560"],"is_preprint":false},{"year":2004,"finding":"Human NRF3 heterodimerizes with MAFG (identified by in vivo protein-protein interaction screen), and the NRF3/MAFG heterodimer binds NF-E2/MARE-type DNA elements; a strong transcriptional activation domain was mapped to the center region of NRF3.","method":"Yeast two-hybrid screen using full-length MAFG as bait, transfection confirmation, functional transcriptional activation assays","journal":"Molecular endocrinology","confidence":"High","confidence_rationale":"Tier 2 — reciprocal interaction confirmed by transfection, domain mapping with functional readout","pmids":["15388789"],"is_preprint":false},{"year":2007,"finding":"NRF3 protein undergoes rapid proteasomal turnover and is N-linked glycosylated; it is associated with the endoplasmic reticulum.","method":"Cycloheximide chase, proteasome inhibitor (MG-132) treatment, glycosylation assays, subcellular fractionation","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 2 — multiple biochemical methods establishing ER localization, glycosylation, and proteasomal degradation","pmids":["17976382"],"is_preprint":false},{"year":2008,"finding":"Mouse NRF3 is targeted to the ER through its N-terminal NHB1 sequence, which functions as a tripartite signal peptide (n, h, c regions). The h region (residues 12-23) directs ER targeting and is required for N-glycosylation. Proteolytic processing generates ~90, ~80, and ~70 kDa isoforms; the ~90 kDa glycoprotein and ~80 kDa form localize to the nuclear envelope, while the ~70 kDa isoform is detected primarily in the nucleoplasm. NHB1 is required for ER stress-induced (tunicamycin, brefeldin A) activation.","method":"Mutagenesis of NHB1, subcellular fractionation, immunofluorescence, deglycosylation assays, ER stress treatment","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 — reconstitution-level mutagenesis and fractionation identifying signal peptide, glycosylation site, and protease cleavage site","pmids":["19047052"],"is_preprint":false},{"year":2010,"finding":"NRF3 promotes smooth muscle cell (SMC) differentiation from stem cells by upregulating the SMC-specific transcription factor myocardin, increasing binding of SRF and myocardin to SMC differentiation gene promoters, and directly binding SMC gene promoters. NRF3 also promotes NADPH oxidase-derived ROS production and suppresses antioxidant signaling during SMC differentiation.","method":"shRNA knockdown, overexpression, chromatin immunoprecipitation (ChIP), promoter binding, ROS measurement, in vitro differentiation assays","journal":"Circulation research","confidence":"High","confidence_rationale":"Tier 2 — KD/OE with defined phenotype plus ChIP demonstrating direct promoter binding","pmids":["20093628"],"is_preprint":false},{"year":2012,"finding":"NRF3 directly binds to the promoter of Pla2g7 (phospholipase A2, group 7) to regulate its expression during SMC differentiation; Pla2g7 in turn increases ROS generation and SRF binding to SMC gene promoters, linking NRF3-Pla2g7 axis to SMC differentiation.","method":"ChIP assay on Pla2g7 promoter, knockdown/overexpression of Pla2g7, ROS measurements, SRF binding assays","journal":"Arteriosclerosis, thrombosis, and vascular biology","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP plus functional KD/OE, single lab","pmids":["22247257"],"is_preprint":false},{"year":2015,"finding":"NFE2L3 is ubiquitinated and degraded by the SCF E3 ubiquitin ligase component FBW7, requiring dimerization of FBW7. GSK3 phosphorylates NFE2L3 to prime it for FBW7-dependent ubiquitination. FBW7 abrogates NFE2L3-mediated repression of the NQO1 ARE.","method":"Co-immunoprecipitation, ubiquitination assays, phosphorylation assays, FBW7 dimerization mutants, functional ARE reporter assay","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal biochemical methods (Co-IP, ubiquitination, phosphorylation, functional reporter), identifying writer (GSK3) and E3 ligase (FBW7)","pmids":["26306035"],"is_preprint":false},{"year":2017,"finding":"Under physiological conditions NRF3 is degraded by the ER-associated degradation (ERAD) ubiquitin ligase HRD1 and VCP (valosin-containing protein) in the cytoplasm, and in the nucleus by β-TRCP (adaptor for SCF ubiquitin ligase). Nuclear translocation of NRF3 from the ER requires the aspartic protease DDI2 but is independent of HRD1-VCP inhibition. NRF3 induces UHMK1 gene expression to promote cancer cell proliferation.","method":"Co-immunoprecipitation, proteasome inhibitor assays, siRNA knockdown of HRD1/VCP/DDI2/β-TRCP, nuclear fractionation, gene expression analysis","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 2 — multiple orthogonal methods identifying ERAD machinery components and required protease, with functional proliferation readout","pmids":["28970512"],"is_preprint":false},{"year":2018,"finding":"NRF3 promotes UV-induced apoptosis in keratinocytes by suppressing cell-cell and cell-matrix adhesion; NRF3-deficient keratinocytes show higher surface integrin levels, enhanced focal adhesion kinase activation, more/larger focal adhesions, and higher motility.","method":"NRF3 knockout mouse model, UV irradiation in vitro and in vivo, integrin surface staining, focal adhesion kinase phosphorylation assay, focal adhesion imaging","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 — KO mouse model with in vitro and in vivo phenotyping plus mechanistic molecular markers","pmids":["29487353"],"is_preprint":false},{"year":2019,"finding":"NFE2L3 expression in colon cancer cells is regulated by the RELA subunit of NF-κB; NFE2L3 in turn activates expression of DUX4, which functions as a direct inhibitor of CDK1, thereby modulating colon cancer cell proliferation.","method":"ChIP, siRNA knockdown, overexpression, in vitro proliferation assays, in vivo tumor xenograft","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 — ChIP establishing direct regulatory links plus in vitro and in vivo functional validation","pmids":["31693889"],"is_preprint":false},{"year":2019,"finding":"NRF3 specifically enhances 20S proteasome assembly in cancer cells by transcriptionally inducing POMP (proteasome maturation protein), leading to ubiquitin-independent proteolysis of tumor suppressors p53 and retinoblastoma (Rb) protein.","method":"Transcriptional reporter assays, ChIP, proteasome activity assays, protein stability assays using 20S-specific inhibitor (bortezomib) and E1 inhibitor (TAK-243), KD/KO in cancer cells, in vivo xenograft and metastasis models","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1 — mechanistic dissection using specific proteasome vs. ubiquitin pathway inhibitors plus ChIP and in vivo validation","pmids":["32123008"],"is_preprint":false},{"year":2019,"finding":"The β-catenin/TCF4 complex directly binds a conserved WRE (TCF/LEF consensus element) in the NRF3 gene promoter to induce NRF3 expression in colon cancer cells; this axis drives cell proliferation and GLUT1 expression and was validated in Apc-deficient mouse intestine and organoids.","method":"ChIP, luciferase reporter assay, conditional Apc-knockout mouse intestine/organoids, gene expression analysis","journal":"International journal of molecular sciences","confidence":"High","confidence_rationale":"Tier 2 — ChIP plus reporter assay plus in vivo mouse model validation","pmids":["31288376"],"is_preprint":false},{"year":2020,"finding":"NFE2L3 represses NFE2L1 translation by inducing the expression of CPEB3, a translational regulator that binds the NFE2L1 3′ UTR and decreases polysome formation on NFE2L1 mRNA. Together NFE2L1 and NFE2L3 complementarily maintain basal expression of seven proteasome-related genes (PSMB3, PSMB7, PSMC2, PSMD3, PSMG2, PSMG3, POMP) and proteasome activity in cancer cells.","method":"Double knockdown, polysome profiling, RIP (RNA immunoprecipitation), gene expression analysis, proteasome activity assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 — polysome profiling and RIP directly demonstrating translational repression mechanism, multiple orthogonal methods","pmids":["32366381"],"is_preprint":false},{"year":2022,"finding":"NFE2L3 directly binds the regulatory sequences of IL33 and RAB27A loci in human colorectal carcinoma cells (ChIP-validated), regulating mast cell-related gene expression and tumor microenvironment composition including mast cell abundance and immunosuppressive Treg levels in vivo.","method":"ChIP in human colorectal carcinoma cells, Nfe2l3-/- mouse model of inflammation-induced colorectal cancer, histological analysis, CIBERSORT immune cell deconvolution, digital spatial profiling","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 — ChIP plus KO mouse model with in vivo immune phenotyping","pmids":["35091681"],"is_preprint":false},{"year":2022,"finding":"NRF3 regulates macropinocytosis and autophagy to coordinate the melanogenesis cascade: NRF3 transcriptionally upregulates the core melanogenic gene circuit (Mitf, Tyr, Tyrp1, Pmel, Oca2) and induces Cln3 (autophagosome-related factor) for melanin precursor uptake by macropinocytosis, as well as Ulk2 and Gabarapl2 for melanosome formation and autolysosomal degradation.","method":"ChIP-seq, siRNA knockdown, overexpression, macropinocytosis assays, melanin quantification, gene expression analysis","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 — ChIP-seq plus functional assays establishing direct transcriptional targets and their cellular roles","pmids":["36640303"],"is_preprint":false},{"year":2023,"finding":"NRF3 promotes HCC cell proliferation by transcriptionally inducing proteasome genes and ISG15, which causes ISGylation of p53 and its subsequent proteasome-dependent degradation.","method":"ChIP, gene expression analysis, protein stability assays, knockdown/overexpression in HCC cells","journal":"Cancer science","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP plus mechanistic protein stability assays, single lab","pmids":["37350063"],"is_preprint":false},{"year":2023,"finding":"NRF3 contributes to cancer cell viability through mTORC1 activation in response to arginine by inducing SLC38A9 and RagC expression for arginine-dependent mTORC1 lysosomal recruitment, and by inducing RAB5 to enhance macropinocytosis and SLC7A1 for arginine transport into lysosomes.","method":"ChIP, gene expression analysis, mTORC1 activity assays, lysosomal fractionation, macropinocytosis assays, siRNA knockdown, xenograft tumor models","journal":"iScience","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP plus mechanistic functional assays, single lab","pmids":["36818298"],"is_preprint":false},{"year":2023,"finding":"NRF3 deficiency promotes malignant progression of squamous cell carcinoma cells through upregulation of HSPA5 (a key unfolded protein response regulator); NRF3 was identified as an interactor of HSPA5, and pharmacological or knockdown inhibition of HSPA5 rescued the malignant features of NRF3-deficient SCC cells.","method":"NRF3-deficient mouse skin tumor models, 3D invasion cultures, xenograft formation, Co-immunoprecipitation (NRF3-HSPA5 interaction), pharmacological HSPA5 inhibition, siRNA knockdown","journal":"EMBO molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 — co-IP identifying interaction plus functional rescue by HSPA5 inhibition in vitro and in vivo, single lab","pmids":["37807968"],"is_preprint":false},{"year":2023,"finding":"NRF3 promotes TNBC cell proliferation by directly binding to the p110α promoter and transcriptionally activating the PI3K/AKT/mTOR signaling pathway.","method":"ChIP assay, luciferase reporter assay, overexpression/knockdown, PI3K inhibitor treatment, proliferation/migration assays","journal":"Oncology letters","confidence":"Medium","confidence_rationale":"Tier 2 — ChIP and reporter assay establishing direct promoter binding with functional rescue, single lab","pmids":["37720674"],"is_preprint":false},{"year":2024,"finding":"NRF3 promotes injury-induced cardiomyocyte apoptosis and cardiac dysfunction by increasing mitochondrial ROS production through suppression of Pitx2: NRF3 binds the Pitx2 promoter and increases DNA methylation by recruiting hnRNPK and DNMT1 complex, thereby inhibiting Pitx2 expression.","method":"CM-specific and global Nrf3 KO mice, MI/ischemia-reperfusion models, ChIP-seq, IP-mass spectrometry, AAV-mediated cardiac-specific overexpression, MitoParaquat ROS augmentation","journal":"Circulation","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP-seq, IP-MS identifying complex components, multiple genetic mouse models with in vivo cardiac phenotypes, mechanistic rescue experiments","pmids":["40099370"],"is_preprint":false},{"year":2024,"finding":"NRF3 promotes VSMC dysfunction and neointimal hyperplasia by transcriptionally activating Trim5, which in turn triggers autophagy in VSMCs; Nrf3 expression is induced by ER stress via ATF4; Nrf3-/- and VSMC-specific knockout mice show attenuated injury-induced neointimal hyperplasia.","method":"Global and VSMC-specific Nrf3 KO mice, wire-injury and porcine carotid stenting models, transcriptomics, ChIP, Co-immunoprecipitation, perivascular Nrf3 inhibitor delivery","journal":"Cardiovascular research","confidence":"High","confidence_rationale":"Tier 2 — multiple genetic mouse models plus ChIP and in vivo therapeutic intervention, single lab","pmids":["40377016"],"is_preprint":false},{"year":2024,"finding":"NRF3 promotes neuroprotection and long-distance axon regeneration after optic nerve injury when virally expressed in retinal ganglion cells in vivo; Nfe2l3 expression peaks in developing but not adult projection neurons and is not upregulated after injury.","method":"Viral vector (AAV) delivery of Nfe2l3 to retinal ganglion cells, optic nerve crush model, axon regeneration quantification, scRNA-seq expression profiling","journal":"Experimental neurology","confidence":"Medium","confidence_rationale":"Tier 2 — in vivo gain-of-function with defined regeneration phenotype, single lab, single method per readout","pmids":["38395216"],"is_preprint":false},{"year":2025,"finding":"METTL3 stabilizes NFE2L3 mRNA via N6-methyladenosine (m6A) modification, which upregulates NFE2L3 protein levels and activates intrinsic WNT signaling to maintain cancer stem cell stemness in lung adenocarcinoma.","method":"m6A-RIP sequencing, RNA stability assays, METTL3 knockdown/overexpression, WNT pathway activity assays, cancer stem cell functional assays","journal":"Science advances","confidence":"Medium","confidence_rationale":"Tier 2 — m6A-RIP directly establishing modification plus functional downstream validation, single lab","pmids":["40249818"],"is_preprint":false},{"year":2025,"finding":"NAT10 mediates ac4C acetylation of NFE2L3 mRNA, promoting its mRNA stability; NFE2L3 in turn binds to LASP1 genomic loci (ChIP-seq) to regulate its expression and activates the AKT/GSK3β/β-catenin signaling axis in ccRCC.","method":"acRIP-seq, RIP, RNA stability assays, dual luciferase reporter, ChIP-seq, NAT10 KD/OE, xenograft models","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 — ac4C-RIP plus ChIP-seq with functional in vivo validation, single lab","pmids":["40169553"],"is_preprint":false},{"year":2025,"finding":"NFE2L3 induces mevalonate biosynthesis and reduces intracellular neutral fatty acid levels by inducing SREBP2 and HMGCR gene expression and inducing GGPS1 gene expression; NFE2L3 also induces RAB5 gene expression to promote macropinocytosis for cholesterol uptake.","method":"Transcriptional target analysis, gene expression, ChIP (referenced in review context from primary study)","journal":"International journal of molecular sciences","confidence":"Low","confidence_rationale":"Tier 3 — described in review summary without original experimental detail in this abstract","pmids":["34884489"],"is_preprint":false},{"year":2022,"finding":"NFE2L3 regulates colitis-related gene expression by controlling STAT1, HMOX1, and SLC7A11 protein levels in DSS-treated colon; Nfe2l3-/- mice show reduced induction of these proteins upon DSS treatment, suggesting NFE2L3 primes a pro-inflammatory state. NFE2L3 binding partners MAFF and MAFK (from ENCODE ChIP data) were used to identify these targets.","method":"Nfe2l3-/- mouse DSS colitis model, Western blot for pSTAT1, HMOX1, SLC7A11, ENCODE ChIP data cross-reference","journal":"Biochimica et biophysica acta. Molecular cell research","confidence":"Medium","confidence_rationale":"Tier 2 — KO mouse model with protein level readouts, though target identification relies partly on ENCODE ChIP data from binding partners","pmids":["40360021"],"is_preprint":false}],"current_model":"NFE2L3 (NRF3) is a CNC-bZIP transcription factor that is anchored to the ER membrane via its NHB1 signal peptide, undergoes N-glycosylation and proteasomal degradation (primed by GSK3 phosphorylation and mediated by FBW7 in the nucleus and HRD1/VCP in the cytoplasm), and is released to the nucleus via DDI2-dependent cleavage in response to ER stress; in the nucleus it heterodimerizes with small Maf proteins (MafK, MAFG) to bind ARE/MARE elements and regulate transcription — acting as a repressor of NRF2-mediated antioxidant gene expression (e.g., NQO1), while also directly inducing POMP to enhance 20S proteasome assembly enabling ubiquitin-independent degradation of p53 and Rb, inducing CPEB3 to translationally repress NFE2L1, and regulating additional target genes (UHMK1, DUX4, Trim5, Pitx2, GLUT1, Pla2g7, melanogenic genes) to control cancer cell proliferation, vascular smooth muscle differentiation, cardiac homeostasis, and keratinocyte apoptosis."},"narrative":{"teleology":[{"year":1999,"claim":"Identification of NFE2L3 as a CNC-bZIP factor that heterodimerizes with small Maf proteins to bind MARE elements established its basic molecular identity as a transcriptional regulator.","evidence":"In vitro transcription/translation, EMSA, and transfection assays with MafK","pmids":["10037736"],"confidence":"High","gaps":["Endogenous target genes unknown","In vivo function uncharacterized","Subcellular localization not determined"]},{"year":2004,"claim":"Demonstrating that NFE2L3 represses NRF2-driven ARE-mediated NQO1 expression by competing for ARE binding via Maf heterodimerization revealed its antagonistic relationship with NRF2 in antioxidant gene regulation.","evidence":"Overexpression, deletion mutagenesis, EMSA/supershift, RNAi in HepG2 cells; independently confirmed MAFG interaction via yeast two-hybrid","pmids":["15385560","15388789"],"confidence":"High","gaps":["Genome-wide target repertoire unknown","Mechanism of selective repression versus activation not resolved","Physiological contexts for NRF2 antagonism not tested in vivo"]},{"year":2007,"claim":"Discovery that NFE2L3 is ER-associated, N-glycosylated, and subject to rapid proteasomal turnover revealed an unexpected membrane-tethered lifecycle for a transcription factor, raising the question of how it reaches the nucleus.","evidence":"Cycloheximide chase, MG-132 treatment, glycosylation assays, subcellular fractionation","pmids":["17976382"],"confidence":"High","gaps":["Mechanism of ER-to-nucleus transit unknown","Identity of the protease releasing NRF3 not established","E3 ligase responsible for degradation not identified"]},{"year":2008,"claim":"Mapping the NHB1 tripartite signal peptide as the ER-targeting and glycosylation-directing domain, and showing that ER stress agents trigger NRF3 nuclear accumulation, established the regulated ER-to-nucleus signaling paradigm for this factor.","evidence":"NHB1 mutagenesis, subcellular fractionation, immunofluorescence, ER stress treatment (tunicamycin, brefeldin A) in mouse cells","pmids":["19047052"],"confidence":"High","gaps":["Identity of the protease cleaving NRF3 from the ER unknown","Specific ER stress sensor upstream of NRF3 release not identified"]},{"year":2010,"claim":"Showing that NFE2L3 promotes vascular smooth muscle differentiation by inducing myocardin and directly binding SMC gene promoters revealed a physiological non-cancer role and its capacity to regulate lineage-specific gene programs.","evidence":"shRNA KD, overexpression, ChIP on SMC promoters, ROS measurement, in vitro stem cell differentiation","pmids":["20093628"],"confidence":"High","gaps":["In vivo vascular phenotype of NRF3 loss not yet tested","Whether NRF3 binds SMC promoters directly or via Maf partners unresolved"]},{"year":2015,"claim":"Identification of FBW7 as the E3 ligase for nuclear NFE2L3, with GSK3-dependent phosphodegron priming, resolved how nuclear NFE2L3 protein levels are controlled and linked its stability to a major tumor suppressor pathway.","evidence":"Co-IP, ubiquitination assays, phosphorylation assays, FBW7 dimerization mutants, ARE reporter in mammalian cells","pmids":["26306035"],"confidence":"High","gaps":["Cytoplasmic degradation pathway not yet defined","Relationship between ER-tethered and nuclear degradation routes unclear"]},{"year":2017,"claim":"Identification of HRD1/VCP as the cytoplasmic ERAD machinery and DDI2 aspartic protease as the enzyme releasing NFE2L3 from the ER completed the dual-compartment degradation model and revealed the ER-to-nucleus transit mechanism.","evidence":"siRNA KD of HRD1, VCP, DDI2, β-TRCP; nuclear fractionation; proliferation assays identifying UHMK1 as target gene","pmids":["28970512"],"confidence":"High","gaps":["DDI2 cleavage site on NRF3 not mapped","Signal connecting ER stress to DDI2 activation uncharacterized"]},{"year":2018,"claim":"Demonstrating that NRF3-deficient keratinocytes resist UV-induced apoptosis due to enhanced integrin-FAK signaling established NRF3 as a pro-apoptotic factor that regulates cell adhesion, expanding its roles beyond transcription of metabolic/proteasome genes.","evidence":"Nrf3 KO mouse keratinocytes, UV irradiation in vitro/in vivo, integrin staining, FAK phosphorylation, focal adhesion imaging","pmids":["29487353"],"confidence":"High","gaps":["Direct transcriptional targets mediating adhesion changes not identified","Whether this is Maf-dependent not tested"]},{"year":2019,"claim":"Three contemporaneous studies established NFE2L3 as a cancer-promoting transcription factor: it induces POMP to assemble 20S proteasomes for ubiquitin-independent p53/Rb degradation, induces DUX4 downstream of NF-κB to modulate CDK1, and is itself a Wnt/β-catenin target driving GLUT1 and proliferation in colon cancer.","evidence":"ChIP, proteasome activity assays, E1 inhibitor (TAK-243) dissection, xenograft/metastasis models; NF-κB ChIP; Apc-KO mouse organoids and reporter assays","pmids":["32123008","31693889","31288376"],"confidence":"High","gaps":["Whether 20S-mediated p53 degradation operates in non-cancer contexts unknown","Relative contribution of POMP vs. DUX4 vs. GLUT1 axes to tumor growth not delineated"]},{"year":2020,"claim":"Showing that NFE2L3 induces CPEB3 to translationally repress NFE2L1, while both factors complementarily maintain basal proteasome subunit gene expression, revealed a cross-regulatory circuit between CNC-bZIP paralogs governing proteasome homeostasis.","evidence":"Double KD, polysome profiling, RNA immunoprecipitation for CPEB3–NFE2L1 mRNA, proteasome activity assays","pmids":["32366381"],"confidence":"High","gaps":["Whether NFE2L1 reciprocally regulates NFE2L3 not tested","Physiological conditions triggering this cross-regulation unknown"]},{"year":2022,"claim":"NFE2L3 was shown to directly bind IL33 and RAB27A loci and shape the colorectal tumor immune microenvironment (mast cell and Treg abundance), extending its oncogenic role beyond cell-intrinsic proliferation to tumor–immune crosstalk.","evidence":"ChIP in human CRC cells, Nfe2l3−/− mouse AOM/DSS colitis-cancer model, CIBERSORT deconvolution, digital spatial profiling","pmids":["35091681"],"confidence":"High","gaps":["Whether mast cell recruitment is sufficient or necessary for NRF3-driven tumorigenesis not resolved","Direct versus indirect regulation of immune infiltrate composition unclear"]},{"year":2022,"claim":"ChIP-seq revealed NFE2L3 coordinates melanogenesis by transcriptionally activating the core melanogenic gene circuit (Mitf, Tyr, Tyrp1) and macropinocytosis/autophagy genes (Cln3, Ulk2, Gabarapl2), linking NRF3 to vesicular trafficking-dependent pigmentation.","evidence":"ChIP-seq, siRNA KD, overexpression, macropinocytosis and melanin quantification assays","pmids":["36640303"],"confidence":"High","gaps":["Whether NRF3 binds melanogenic promoters directly or via MITF cooperativity not resolved","In vivo pigmentation phenotype of Nrf3 KO not reported"]},{"year":2023,"claim":"Multiple studies expanded NFE2L3's cancer-promoting mechanisms to include ISGylation-mediated p53 degradation in HCC, mTORC1 activation via SLC38A9/RagC/RAB5 induction for arginine sensing, PI3K/AKT pathway activation in TNBC, and a context-dependent tumor-suppressive role in squamous cell carcinoma via HSPA5 restraint.","evidence":"ChIP, protein stability assays in HCC; lysosomal fractionation and macropinocytosis assays; luciferase reporter on p110α promoter; NRF3-deficient mouse SCC models with HSPA5 co-IP and pharmacological rescue","pmids":["37350063","36818298","37720674","37807968"],"confidence":"Medium","gaps":["Tissue-specific determinants of oncogenic versus tumor-suppressive NRF3 function unresolved","Whether ISGylation and 20S proteasome routes to p53 degradation are redundant or tissue-specific unknown","Each axis from a single laboratory"]},{"year":2024,"claim":"In the heart, NFE2L3 was shown to epigenetically silence Pitx2 by recruiting an hnRNPK–DNMT1 complex to the Pitx2 promoter, increasing DNA methylation and thereby promoting cardiomyocyte apoptosis via mitochondrial ROS after injury — establishing NRF3 as an epigenetic regulator beyond classical transcriptional activation.","evidence":"CM-specific and global Nrf3 KO mice, MI and I/R models, ChIP-seq, IP-mass spectrometry identifying hnRNPK and DNMT1, AAV rescue","pmids":["40099370"],"confidence":"High","gaps":["Whether hnRNPK–DNMT1 recruitment is a general mechanism at other NRF3 targets unknown","Role of Maf partners in cardiac context not examined"]},{"year":2024,"claim":"In vascular injury, NFE2L3 (induced by ATF4 under ER stress) transcriptionally activates Trim5 to trigger VSMC autophagy and neointimal hyperplasia, validated by VSMC-specific KO and therapeutic perivascular NRF3 inhibition, linking the ER stress–DDI2–NRF3 axis to vascular disease.","evidence":"Global and VSMC-specific Nrf3 KO mice, wire-injury and porcine stenting models, ChIP, transcriptomics, perivascular inhibitor delivery","pmids":["40377016"],"confidence":"High","gaps":["Direct ATF4 binding to Nrf3 promoter not shown by ChIP","Whether DDI2 cleavage is required in this vascular context not tested"]},{"year":2025,"claim":"Post-transcriptional regulation of NFE2L3 mRNA was established: METTL3-mediated m6A modification stabilizes NFE2L3 mRNA to activate Wnt signaling in lung adenocarcinoma, and NAT10-mediated ac4C acetylation stabilizes NFE2L3 mRNA to drive AKT/GSK3β/β-catenin signaling in ccRCC, revealing epitranscriptomic control of NRF3 expression.","evidence":"m6A-RIP-seq, ac4C-RIP-seq, RNA stability assays, KD/OE of METTL3 and NAT10, WNT and AKT pathway assays, xenograft models","pmids":["40249818","40169553"],"confidence":"Medium","gaps":["Specific m6A and ac4C sites on NFE2L3 mRNA not mapped at single-nucleotide resolution","Whether these modifications operate in non-cancer physiology unknown","Each finding from a single laboratory"]},{"year":null,"claim":"Key open questions include: (1) the structural basis for DDI2-mediated NRF3 cleavage and how ER stress activates DDI2; (2) what determines whether NRF3 acts as an oncogene or tumor suppressor in different tissue contexts; (3) whether the hnRNPK–DNMT1 epigenetic silencing mechanism generalizes beyond the Pitx2 locus; and (4) a comprehensive ChIP-seq-defined cistrome across tissues to unify the diverse transcriptional programs attributed to NRF3.","evidence":"","pmids":[],"confidence":"Low","gaps":["No crystal or cryo-EM structure of NRF3 or NRF3–DDI2 complex","No systematic loss-of-function screen across tissues to define context-dependent gene programs","No Mendelian disease association established"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,2,5,10,11,13,15,20]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,1,2,5,6,10,11,14,15,20,24]}],"localization":[{"term_id":"GO:0005783","term_label":"endoplasmic reticulum","supporting_discovery_ids":[3,4]},{"term_id":"GO:0005635","term_label":"nuclear envelope","supporting_discovery_ids":[4]},{"term_id":"GO:0005654","term_label":"nucleoplasm","supporting_discovery_ids":[4,8]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,1,2,5,10,11,15,20]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[3,7,8,11,13]},{"term_id":"R-HSA-8953897","term_label":"Cellular responses to stimuli","supporting_discovery_ids":[4,8,21]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[9,20]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[12,17,19,23,24]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[15,21]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[11,16,17,19]}],"complexes":["NRF3–small Maf heterodimer (MafK, MAFG, MAFF)","hnRNPK–DNMT1–NRF3 epigenetic silencing complex"],"partners":["MAFK","MAFG","FBW7","DDI2","HRD1","VCP","HSPA5","HNRNPK"],"other_free_text":[]},"mechanistic_narrative":"NFE2L3 (NRF3) is a CNC-bZIP transcription factor that integrates ER stress signaling with nuclear gene regulation to control proteasome homeostasis, redox balance, cell proliferation, and differentiation across diverse tissues. It is anchored to the ER membrane via its NHB1 signal peptide, undergoes N-glycosylation and dual-compartment proteasomal degradation (HRD1/VCP-mediated ERAD in the cytoplasm; FBW7- and β-TRCP-dependent ubiquitination in the nucleus, primed by GSK3 phosphorylation), and is released to the nucleus through DDI2 aspartic protease cleavage upon ER stress [PMID:19047052, PMID:28970512, PMID:26306035]. In the nucleus, NFE2L3 heterodimerizes with small Maf proteins (MafK, MAFG) to bind ARE/MARE elements, where it represses NRF2-dependent antioxidant genes such as NQO1 while transcriptionally inducing POMP to enhance 20S proteasome assembly, enabling ubiquitin-independent degradation of p53 and Rb, and induces CPEB3 to translationally repress NFE2L1, thereby coordinating proteasome gene expression with its CNC-bZIP paralog [PMID:15385560, PMID:32123008, PMID:32366381]. Beyond cancer cell proliferation, NFE2L3 drives vascular smooth muscle differentiation via myocardin and Pla2g7 induction, promotes cardiomyocyte apoptosis by epigenetically silencing Pitx2 through recruitment of an hnRNPK–DNMT1 complex, regulates melanogenesis through macropinocytosis and autophagy gene programs, and shapes the tumor immune microenvironment by controlling IL33 and RAB27A expression [PMID:20093628, PMID:40099370, PMID:36640303, PMID:35091681]."},"prefetch_data":{"uniprot":{"accession":"Q9Y4A8","full_name":"Nuclear factor erythroid 2-related factor 3","aliases":["Nuclear factor, erythroid derived 2, like 3"],"length_aa":694,"mass_kda":76.2,"function":"Activates erythroid-specific, globin gene expression","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q9Y4A8/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/NFE2L3","classification":"Common 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Molecular cell research","url":"https://pubmed.ncbi.nlm.nih.gov/40360021","citation_count":1,"is_preprint":false},{"pmid":"41838283","id":"PMC_41838283","title":"Nrf3: an emerging player in cancer, inflammation, and cellular homeostasis.","date":"2026","source":"Molecular biology reports","url":"https://pubmed.ncbi.nlm.nih.gov/41838283","citation_count":0,"is_preprint":false},{"pmid":"41534777","id":"PMC_41534777","title":"Emodin induces oxidative stress and Ferroptosis in hepatocellular carcinoma cells through the miR-4465/NFE2L3/HMGCR/GPX4 signaling axis.","date":"2026","source":"Life sciences","url":"https://pubmed.ncbi.nlm.nih.gov/41534777","citation_count":0,"is_preprint":false},{"pmid":"41652483","id":"PMC_41652483","title":"A comprehensive review of the emerging role of NRF3 in ovarian cancer tumorigenesis and progression.","date":"2026","source":"Journal of ovarian research","url":"https://pubmed.ncbi.nlm.nih.gov/41652483","citation_count":0,"is_preprint":false},{"pmid":"41613788","id":"PMC_41613788","title":"BHLHE40 Is a Transcriptional Regulatory Target of NFE2L3 in Triple-Negative Breast Cancer.","date":"2026","source":"Oncology research","url":"https://pubmed.ncbi.nlm.nih.gov/41613788","citation_count":0,"is_preprint":false},{"pmid":"36328531","id":"PMC_36328531","title":"Nrf3 Functions Reversely as a Tumorigenic to an Antitumorigenic Transcription Factor in Obese Mice.","date":"2022","source":"The Tohoku journal of experimental medicine","url":"https://pubmed.ncbi.nlm.nih.gov/36328531","citation_count":0,"is_preprint":false},{"pmid":"31641240","id":"PMC_31641240","title":"Correction to: Nrf3 promotes UV-induced keratinocyte apoptosis through suppression of cell adhesion.","date":"2020","source":"Cell death and differentiation","url":"https://pubmed.ncbi.nlm.nih.gov/31641240","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.01.02.631118","title":"Targeting Osteosarcoma heterogeneity to improve therapeutic response","date":"2025-01-03","source":"bioRxiv","url":"https://doi.org/10.1101/2025.01.02.631118","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2025.02.28.640917","title":"Integrative Machine Learning Reveals Potential Signature Genes Using Transcriptomics in Colon Cancer","date":"2025-03-06","source":"bioRxiv","url":"https://doi.org/10.1101/2025.02.28.640917","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":32066,"output_tokens":6489,"usd":0.096767},"stage2":{"model":"claude-opus-4-6","input_tokens":10142,"output_tokens":4749,"usd":0.254153},"total_usd":0.35092,"stage1_batch_id":"msgbatch_012ZiiCUBfB62NCTQd4Bk1Jo","stage2_batch_id":"msgbatch_01Xuqq9aUHoQouS7UVGZNStZ","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1999,\n      \"finding\": \"NRF3 (NFE2L3) heterodimerizes with small Maf proteins (e.g., MafK) and the resulting complex binds to Maf recognition elements (MARE) in the chicken β-globin enhancer to activate transcription.\",\n      \"method\": \"In vitro transcription/translation, EMSA (bandshift), in vivo transfection assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro binding and in vivo transcriptional activation assays, foundational paper with 252 citations\",\n      \"pmids\": [\"10037736\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"NRF3 acts as a negative regulator of ARE-mediated NQO1 gene expression by associating with small Maf proteins to compete for ARE binding, requiring its heterodimerization and DNA-binding domains but not its transcriptional activation domain.\",\n      \"method\": \"Overexpression, deletion mutagenesis, EMSA/supershift, immunoprecipitation, RNA interference in HepG2 cells\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — multiple orthogonal methods including mutagenesis, EMSA, RNAi, and endogenous gene readout\",\n      \"pmids\": [\"15385560\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Human NRF3 heterodimerizes with MAFG (identified by in vivo protein-protein interaction screen), and the NRF3/MAFG heterodimer binds NF-E2/MARE-type DNA elements; a strong transcriptional activation domain was mapped to the center region of NRF3.\",\n      \"method\": \"Yeast two-hybrid screen using full-length MAFG as bait, transfection confirmation, functional transcriptional activation assays\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal interaction confirmed by transfection, domain mapping with functional readout\",\n      \"pmids\": [\"15388789\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"NRF3 protein undergoes rapid proteasomal turnover and is N-linked glycosylated; it is associated with the endoplasmic reticulum.\",\n      \"method\": \"Cycloheximide chase, proteasome inhibitor (MG-132) treatment, glycosylation assays, subcellular fractionation\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple biochemical methods establishing ER localization, glycosylation, and proteasomal degradation\",\n      \"pmids\": [\"17976382\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Mouse NRF3 is targeted to the ER through its N-terminal NHB1 sequence, which functions as a tripartite signal peptide (n, h, c regions). The h region (residues 12-23) directs ER targeting and is required for N-glycosylation. Proteolytic processing generates ~90, ~80, and ~70 kDa isoforms; the ~90 kDa glycoprotein and ~80 kDa form localize to the nuclear envelope, while the ~70 kDa isoform is detected primarily in the nucleoplasm. NHB1 is required for ER stress-induced (tunicamycin, brefeldin A) activation.\",\n      \"method\": \"Mutagenesis of NHB1, subcellular fractionation, immunofluorescence, deglycosylation assays, ER stress treatment\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — reconstitution-level mutagenesis and fractionation identifying signal peptide, glycosylation site, and protease cleavage site\",\n      \"pmids\": [\"19047052\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"NRF3 promotes smooth muscle cell (SMC) differentiation from stem cells by upregulating the SMC-specific transcription factor myocardin, increasing binding of SRF and myocardin to SMC differentiation gene promoters, and directly binding SMC gene promoters. NRF3 also promotes NADPH oxidase-derived ROS production and suppresses antioxidant signaling during SMC differentiation.\",\n      \"method\": \"shRNA knockdown, overexpression, chromatin immunoprecipitation (ChIP), promoter binding, ROS measurement, in vitro differentiation assays\",\n      \"journal\": \"Circulation research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — KD/OE with defined phenotype plus ChIP demonstrating direct promoter binding\",\n      \"pmids\": [\"20093628\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"NRF3 directly binds to the promoter of Pla2g7 (phospholipase A2, group 7) to regulate its expression during SMC differentiation; Pla2g7 in turn increases ROS generation and SRF binding to SMC gene promoters, linking NRF3-Pla2g7 axis to SMC differentiation.\",\n      \"method\": \"ChIP assay on Pla2g7 promoter, knockdown/overexpression of Pla2g7, ROS measurements, SRF binding assays\",\n      \"journal\": \"Arteriosclerosis, thrombosis, and vascular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP plus functional KD/OE, single lab\",\n      \"pmids\": [\"22247257\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"NFE2L3 is ubiquitinated and degraded by the SCF E3 ubiquitin ligase component FBW7, requiring dimerization of FBW7. GSK3 phosphorylates NFE2L3 to prime it for FBW7-dependent ubiquitination. FBW7 abrogates NFE2L3-mediated repression of the NQO1 ARE.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assays, phosphorylation assays, FBW7 dimerization mutants, functional ARE reporter assay\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal biochemical methods (Co-IP, ubiquitination, phosphorylation, functional reporter), identifying writer (GSK3) and E3 ligase (FBW7)\",\n      \"pmids\": [\"26306035\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Under physiological conditions NRF3 is degraded by the ER-associated degradation (ERAD) ubiquitin ligase HRD1 and VCP (valosin-containing protein) in the cytoplasm, and in the nucleus by β-TRCP (adaptor for SCF ubiquitin ligase). Nuclear translocation of NRF3 from the ER requires the aspartic protease DDI2 but is independent of HRD1-VCP inhibition. NRF3 induces UHMK1 gene expression to promote cancer cell proliferation.\",\n      \"method\": \"Co-immunoprecipitation, proteasome inhibitor assays, siRNA knockdown of HRD1/VCP/DDI2/β-TRCP, nuclear fractionation, gene expression analysis\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple orthogonal methods identifying ERAD machinery components and required protease, with functional proliferation readout\",\n      \"pmids\": [\"28970512\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"NRF3 promotes UV-induced apoptosis in keratinocytes by suppressing cell-cell and cell-matrix adhesion; NRF3-deficient keratinocytes show higher surface integrin levels, enhanced focal adhesion kinase activation, more/larger focal adhesions, and higher motility.\",\n      \"method\": \"NRF3 knockout mouse model, UV irradiation in vitro and in vivo, integrin surface staining, focal adhesion kinase phosphorylation assay, focal adhesion imaging\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — KO mouse model with in vitro and in vivo phenotyping plus mechanistic molecular markers\",\n      \"pmids\": [\"29487353\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"NFE2L3 expression in colon cancer cells is regulated by the RELA subunit of NF-κB; NFE2L3 in turn activates expression of DUX4, which functions as a direct inhibitor of CDK1, thereby modulating colon cancer cell proliferation.\",\n      \"method\": \"ChIP, siRNA knockdown, overexpression, in vitro proliferation assays, in vivo tumor xenograft\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP establishing direct regulatory links plus in vitro and in vivo functional validation\",\n      \"pmids\": [\"31693889\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"NRF3 specifically enhances 20S proteasome assembly in cancer cells by transcriptionally inducing POMP (proteasome maturation protein), leading to ubiquitin-independent proteolysis of tumor suppressors p53 and retinoblastoma (Rb) protein.\",\n      \"method\": \"Transcriptional reporter assays, ChIP, proteasome activity assays, protein stability assays using 20S-specific inhibitor (bortezomib) and E1 inhibitor (TAK-243), KD/KO in cancer cells, in vivo xenograft and metastasis models\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — mechanistic dissection using specific proteasome vs. ubiquitin pathway inhibitors plus ChIP and in vivo validation\",\n      \"pmids\": [\"32123008\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"The β-catenin/TCF4 complex directly binds a conserved WRE (TCF/LEF consensus element) in the NRF3 gene promoter to induce NRF3 expression in colon cancer cells; this axis drives cell proliferation and GLUT1 expression and was validated in Apc-deficient mouse intestine and organoids.\",\n      \"method\": \"ChIP, luciferase reporter assay, conditional Apc-knockout mouse intestine/organoids, gene expression analysis\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP plus reporter assay plus in vivo mouse model validation\",\n      \"pmids\": [\"31288376\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"NFE2L3 represses NFE2L1 translation by inducing the expression of CPEB3, a translational regulator that binds the NFE2L1 3′ UTR and decreases polysome formation on NFE2L1 mRNA. Together NFE2L1 and NFE2L3 complementarily maintain basal expression of seven proteasome-related genes (PSMB3, PSMB7, PSMC2, PSMD3, PSMG2, PSMG3, POMP) and proteasome activity in cancer cells.\",\n      \"method\": \"Double knockdown, polysome profiling, RIP (RNA immunoprecipitation), gene expression analysis, proteasome activity assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — polysome profiling and RIP directly demonstrating translational repression mechanism, multiple orthogonal methods\",\n      \"pmids\": [\"32366381\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"NFE2L3 directly binds the regulatory sequences of IL33 and RAB27A loci in human colorectal carcinoma cells (ChIP-validated), regulating mast cell-related gene expression and tumor microenvironment composition including mast cell abundance and immunosuppressive Treg levels in vivo.\",\n      \"method\": \"ChIP in human colorectal carcinoma cells, Nfe2l3-/- mouse model of inflammation-induced colorectal cancer, histological analysis, CIBERSORT immune cell deconvolution, digital spatial profiling\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP plus KO mouse model with in vivo immune phenotyping\",\n      \"pmids\": [\"35091681\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"NRF3 regulates macropinocytosis and autophagy to coordinate the melanogenesis cascade: NRF3 transcriptionally upregulates the core melanogenic gene circuit (Mitf, Tyr, Tyrp1, Pmel, Oca2) and induces Cln3 (autophagosome-related factor) for melanin precursor uptake by macropinocytosis, as well as Ulk2 and Gabarapl2 for melanosome formation and autolysosomal degradation.\",\n      \"method\": \"ChIP-seq, siRNA knockdown, overexpression, macropinocytosis assays, melanin quantification, gene expression analysis\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP-seq plus functional assays establishing direct transcriptional targets and their cellular roles\",\n      \"pmids\": [\"36640303\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"NRF3 promotes HCC cell proliferation by transcriptionally inducing proteasome genes and ISG15, which causes ISGylation of p53 and its subsequent proteasome-dependent degradation.\",\n      \"method\": \"ChIP, gene expression analysis, protein stability assays, knockdown/overexpression in HCC cells\",\n      \"journal\": \"Cancer science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP plus mechanistic protein stability assays, single lab\",\n      \"pmids\": [\"37350063\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"NRF3 contributes to cancer cell viability through mTORC1 activation in response to arginine by inducing SLC38A9 and RagC expression for arginine-dependent mTORC1 lysosomal recruitment, and by inducing RAB5 to enhance macropinocytosis and SLC7A1 for arginine transport into lysosomes.\",\n      \"method\": \"ChIP, gene expression analysis, mTORC1 activity assays, lysosomal fractionation, macropinocytosis assays, siRNA knockdown, xenograft tumor models\",\n      \"journal\": \"iScience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP plus mechanistic functional assays, single lab\",\n      \"pmids\": [\"36818298\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"NRF3 deficiency promotes malignant progression of squamous cell carcinoma cells through upregulation of HSPA5 (a key unfolded protein response regulator); NRF3 was identified as an interactor of HSPA5, and pharmacological or knockdown inhibition of HSPA5 rescued the malignant features of NRF3-deficient SCC cells.\",\n      \"method\": \"NRF3-deficient mouse skin tumor models, 3D invasion cultures, xenograft formation, Co-immunoprecipitation (NRF3-HSPA5 interaction), pharmacological HSPA5 inhibition, siRNA knockdown\",\n      \"journal\": \"EMBO molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — co-IP identifying interaction plus functional rescue by HSPA5 inhibition in vitro and in vivo, single lab\",\n      \"pmids\": [\"37807968\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"NRF3 promotes TNBC cell proliferation by directly binding to the p110α promoter and transcriptionally activating the PI3K/AKT/mTOR signaling pathway.\",\n      \"method\": \"ChIP assay, luciferase reporter assay, overexpression/knockdown, PI3K inhibitor treatment, proliferation/migration assays\",\n      \"journal\": \"Oncology letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ChIP and reporter assay establishing direct promoter binding with functional rescue, single lab\",\n      \"pmids\": [\"37720674\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"NRF3 promotes injury-induced cardiomyocyte apoptosis and cardiac dysfunction by increasing mitochondrial ROS production through suppression of Pitx2: NRF3 binds the Pitx2 promoter and increases DNA methylation by recruiting hnRNPK and DNMT1 complex, thereby inhibiting Pitx2 expression.\",\n      \"method\": \"CM-specific and global Nrf3 KO mice, MI/ischemia-reperfusion models, ChIP-seq, IP-mass spectrometry, AAV-mediated cardiac-specific overexpression, MitoParaquat ROS augmentation\",\n      \"journal\": \"Circulation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP-seq, IP-MS identifying complex components, multiple genetic mouse models with in vivo cardiac phenotypes, mechanistic rescue experiments\",\n      \"pmids\": [\"40099370\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"NRF3 promotes VSMC dysfunction and neointimal hyperplasia by transcriptionally activating Trim5, which in turn triggers autophagy in VSMCs; Nrf3 expression is induced by ER stress via ATF4; Nrf3-/- and VSMC-specific knockout mice show attenuated injury-induced neointimal hyperplasia.\",\n      \"method\": \"Global and VSMC-specific Nrf3 KO mice, wire-injury and porcine carotid stenting models, transcriptomics, ChIP, Co-immunoprecipitation, perivascular Nrf3 inhibitor delivery\",\n      \"journal\": \"Cardiovascular research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — multiple genetic mouse models plus ChIP and in vivo therapeutic intervention, single lab\",\n      \"pmids\": [\"40377016\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"NRF3 promotes neuroprotection and long-distance axon regeneration after optic nerve injury when virally expressed in retinal ganglion cells in vivo; Nfe2l3 expression peaks in developing but not adult projection neurons and is not upregulated after injury.\",\n      \"method\": \"Viral vector (AAV) delivery of Nfe2l3 to retinal ganglion cells, optic nerve crush model, axon regeneration quantification, scRNA-seq expression profiling\",\n      \"journal\": \"Experimental neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — in vivo gain-of-function with defined regeneration phenotype, single lab, single method per readout\",\n      \"pmids\": [\"38395216\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"METTL3 stabilizes NFE2L3 mRNA via N6-methyladenosine (m6A) modification, which upregulates NFE2L3 protein levels and activates intrinsic WNT signaling to maintain cancer stem cell stemness in lung adenocarcinoma.\",\n      \"method\": \"m6A-RIP sequencing, RNA stability assays, METTL3 knockdown/overexpression, WNT pathway activity assays, cancer stem cell functional assays\",\n      \"journal\": \"Science advances\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — m6A-RIP directly establishing modification plus functional downstream validation, single lab\",\n      \"pmids\": [\"40249818\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"NAT10 mediates ac4C acetylation of NFE2L3 mRNA, promoting its mRNA stability; NFE2L3 in turn binds to LASP1 genomic loci (ChIP-seq) to regulate its expression and activates the AKT/GSK3β/β-catenin signaling axis in ccRCC.\",\n      \"method\": \"acRIP-seq, RIP, RNA stability assays, dual luciferase reporter, ChIP-seq, NAT10 KD/OE, xenograft models\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — ac4C-RIP plus ChIP-seq with functional in vivo validation, single lab\",\n      \"pmids\": [\"40169553\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"NFE2L3 induces mevalonate biosynthesis and reduces intracellular neutral fatty acid levels by inducing SREBP2 and HMGCR gene expression and inducing GGPS1 gene expression; NFE2L3 also induces RAB5 gene expression to promote macropinocytosis for cholesterol uptake.\",\n      \"method\": \"Transcriptional target analysis, gene expression, ChIP (referenced in review context from primary study)\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — described in review summary without original experimental detail in this abstract\",\n      \"pmids\": [\"34884489\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"NFE2L3 regulates colitis-related gene expression by controlling STAT1, HMOX1, and SLC7A11 protein levels in DSS-treated colon; Nfe2l3-/- mice show reduced induction of these proteins upon DSS treatment, suggesting NFE2L3 primes a pro-inflammatory state. NFE2L3 binding partners MAFF and MAFK (from ENCODE ChIP data) were used to identify these targets.\",\n      \"method\": \"Nfe2l3-/- mouse DSS colitis model, Western blot for pSTAT1, HMOX1, SLC7A11, ENCODE ChIP data cross-reference\",\n      \"journal\": \"Biochimica et biophysica acta. Molecular cell research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — KO mouse model with protein level readouts, though target identification relies partly on ENCODE ChIP data from binding partners\",\n      \"pmids\": [\"40360021\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"NFE2L3 (NRF3) is a CNC-bZIP transcription factor that is anchored to the ER membrane via its NHB1 signal peptide, undergoes N-glycosylation and proteasomal degradation (primed by GSK3 phosphorylation and mediated by FBW7 in the nucleus and HRD1/VCP in the cytoplasm), and is released to the nucleus via DDI2-dependent cleavage in response to ER stress; in the nucleus it heterodimerizes with small Maf proteins (MafK, MAFG) to bind ARE/MARE elements and regulate transcription — acting as a repressor of NRF2-mediated antioxidant gene expression (e.g., NQO1), while also directly inducing POMP to enhance 20S proteasome assembly enabling ubiquitin-independent degradation of p53 and Rb, inducing CPEB3 to translationally repress NFE2L1, and regulating additional target genes (UHMK1, DUX4, Trim5, Pitx2, GLUT1, Pla2g7, melanogenic genes) to control cancer cell proliferation, vascular smooth muscle differentiation, cardiac homeostasis, and keratinocyte apoptosis.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"NFE2L3 (NRF3) is a CNC-bZIP transcription factor that integrates ER stress signaling with nuclear gene regulation to control proteasome homeostasis, redox balance, cell proliferation, and differentiation across diverse tissues. It is anchored to the ER membrane via its NHB1 signal peptide, undergoes N-glycosylation and dual-compartment proteasomal degradation (HRD1/VCP-mediated ERAD in the cytoplasm; FBW7- and β-TRCP-dependent ubiquitination in the nucleus, primed by GSK3 phosphorylation), and is released to the nucleus through DDI2 aspartic protease cleavage upon ER stress [PMID:19047052, PMID:28970512, PMID:26306035]. In the nucleus, NFE2L3 heterodimerizes with small Maf proteins (MafK, MAFG) to bind ARE/MARE elements, where it represses NRF2-dependent antioxidant genes such as NQO1 while transcriptionally inducing POMP to enhance 20S proteasome assembly, enabling ubiquitin-independent degradation of p53 and Rb, and induces CPEB3 to translationally repress NFE2L1, thereby coordinating proteasome gene expression with its CNC-bZIP paralog [PMID:15385560, PMID:32123008, PMID:32366381]. Beyond cancer cell proliferation, NFE2L3 drives vascular smooth muscle differentiation via myocardin and Pla2g7 induction, promotes cardiomyocyte apoptosis by epigenetically silencing Pitx2 through recruitment of an hnRNPK–DNMT1 complex, regulates melanogenesis through macropinocytosis and autophagy gene programs, and shapes the tumor immune microenvironment by controlling IL33 and RAB27A expression [PMID:20093628, PMID:40099370, PMID:36640303, PMID:35091681].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Identification of NFE2L3 as a CNC-bZIP factor that heterodimerizes with small Maf proteins to bind MARE elements established its basic molecular identity as a transcriptional regulator.\",\n      \"evidence\": \"In vitro transcription/translation, EMSA, and transfection assays with MafK\",\n      \"pmids\": [\"10037736\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Endogenous target genes unknown\", \"In vivo function uncharacterized\", \"Subcellular localization not determined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Demonstrating that NFE2L3 represses NRF2-driven ARE-mediated NQO1 expression by competing for ARE binding via Maf heterodimerization revealed its antagonistic relationship with NRF2 in antioxidant gene regulation.\",\n      \"evidence\": \"Overexpression, deletion mutagenesis, EMSA/supershift, RNAi in HepG2 cells; independently confirmed MAFG interaction via yeast two-hybrid\",\n      \"pmids\": [\"15385560\", \"15388789\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide target repertoire unknown\", \"Mechanism of selective repression versus activation not resolved\", \"Physiological contexts for NRF2 antagonism not tested in vivo\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Discovery that NFE2L3 is ER-associated, N-glycosylated, and subject to rapid proteasomal turnover revealed an unexpected membrane-tethered lifecycle for a transcription factor, raising the question of how it reaches the nucleus.\",\n      \"evidence\": \"Cycloheximide chase, MG-132 treatment, glycosylation assays, subcellular fractionation\",\n      \"pmids\": [\"17976382\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of ER-to-nucleus transit unknown\", \"Identity of the protease releasing NRF3 not established\", \"E3 ligase responsible for degradation not identified\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Mapping the NHB1 tripartite signal peptide as the ER-targeting and glycosylation-directing domain, and showing that ER stress agents trigger NRF3 nuclear accumulation, established the regulated ER-to-nucleus signaling paradigm for this factor.\",\n      \"evidence\": \"NHB1 mutagenesis, subcellular fractionation, immunofluorescence, ER stress treatment (tunicamycin, brefeldin A) in mouse cells\",\n      \"pmids\": [\"19047052\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of the protease cleaving NRF3 from the ER unknown\", \"Specific ER stress sensor upstream of NRF3 release not identified\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Showing that NFE2L3 promotes vascular smooth muscle differentiation by inducing myocardin and directly binding SMC gene promoters revealed a physiological non-cancer role and its capacity to regulate lineage-specific gene programs.\",\n      \"evidence\": \"shRNA KD, overexpression, ChIP on SMC promoters, ROS measurement, in vitro stem cell differentiation\",\n      \"pmids\": [\"20093628\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo vascular phenotype of NRF3 loss not yet tested\", \"Whether NRF3 binds SMC promoters directly or via Maf partners unresolved\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Identification of FBW7 as the E3 ligase for nuclear NFE2L3, with GSK3-dependent phosphodegron priming, resolved how nuclear NFE2L3 protein levels are controlled and linked its stability to a major tumor suppressor pathway.\",\n      \"evidence\": \"Co-IP, ubiquitination assays, phosphorylation assays, FBW7 dimerization mutants, ARE reporter in mammalian cells\",\n      \"pmids\": [\"26306035\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cytoplasmic degradation pathway not yet defined\", \"Relationship between ER-tethered and nuclear degradation routes unclear\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Identification of HRD1/VCP as the cytoplasmic ERAD machinery and DDI2 aspartic protease as the enzyme releasing NFE2L3 from the ER completed the dual-compartment degradation model and revealed the ER-to-nucleus transit mechanism.\",\n      \"evidence\": \"siRNA KD of HRD1, VCP, DDI2, β-TRCP; nuclear fractionation; proliferation assays identifying UHMK1 as target gene\",\n      \"pmids\": [\"28970512\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"DDI2 cleavage site on NRF3 not mapped\", \"Signal connecting ER stress to DDI2 activation uncharacterized\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Demonstrating that NRF3-deficient keratinocytes resist UV-induced apoptosis due to enhanced integrin-FAK signaling established NRF3 as a pro-apoptotic factor that regulates cell adhesion, expanding its roles beyond transcription of metabolic/proteasome genes.\",\n      \"evidence\": \"Nrf3 KO mouse keratinocytes, UV irradiation in vitro/in vivo, integrin staining, FAK phosphorylation, focal adhesion imaging\",\n      \"pmids\": [\"29487353\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets mediating adhesion changes not identified\", \"Whether this is Maf-dependent not tested\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Three contemporaneous studies established NFE2L3 as a cancer-promoting transcription factor: it induces POMP to assemble 20S proteasomes for ubiquitin-independent p53/Rb degradation, induces DUX4 downstream of NF-κB to modulate CDK1, and is itself a Wnt/β-catenin target driving GLUT1 and proliferation in colon cancer.\",\n      \"evidence\": \"ChIP, proteasome activity assays, E1 inhibitor (TAK-243) dissection, xenograft/metastasis models; NF-κB ChIP; Apc-KO mouse organoids and reporter assays\",\n      \"pmids\": [\"32123008\", \"31693889\", \"31288376\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether 20S-mediated p53 degradation operates in non-cancer contexts unknown\", \"Relative contribution of POMP vs. DUX4 vs. GLUT1 axes to tumor growth not delineated\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showing that NFE2L3 induces CPEB3 to translationally repress NFE2L1, while both factors complementarily maintain basal proteasome subunit gene expression, revealed a cross-regulatory circuit between CNC-bZIP paralogs governing proteasome homeostasis.\",\n      \"evidence\": \"Double KD, polysome profiling, RNA immunoprecipitation for CPEB3–NFE2L1 mRNA, proteasome activity assays\",\n      \"pmids\": [\"32366381\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether NFE2L1 reciprocally regulates NFE2L3 not tested\", \"Physiological conditions triggering this cross-regulation unknown\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"NFE2L3 was shown to directly bind IL33 and RAB27A loci and shape the colorectal tumor immune microenvironment (mast cell and Treg abundance), extending its oncogenic role beyond cell-intrinsic proliferation to tumor–immune crosstalk.\",\n      \"evidence\": \"ChIP in human CRC cells, Nfe2l3−/− mouse AOM/DSS colitis-cancer model, CIBERSORT deconvolution, digital spatial profiling\",\n      \"pmids\": [\"35091681\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether mast cell recruitment is sufficient or necessary for NRF3-driven tumorigenesis not resolved\", \"Direct versus indirect regulation of immune infiltrate composition unclear\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"ChIP-seq revealed NFE2L3 coordinates melanogenesis by transcriptionally activating the core melanogenic gene circuit (Mitf, Tyr, Tyrp1) and macropinocytosis/autophagy genes (Cln3, Ulk2, Gabarapl2), linking NRF3 to vesicular trafficking-dependent pigmentation.\",\n      \"evidence\": \"ChIP-seq, siRNA KD, overexpression, macropinocytosis and melanin quantification assays\",\n      \"pmids\": [\"36640303\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether NRF3 binds melanogenic promoters directly or via MITF cooperativity not resolved\", \"In vivo pigmentation phenotype of Nrf3 KO not reported\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Multiple studies expanded NFE2L3's cancer-promoting mechanisms to include ISGylation-mediated p53 degradation in HCC, mTORC1 activation via SLC38A9/RagC/RAB5 induction for arginine sensing, PI3K/AKT pathway activation in TNBC, and a context-dependent tumor-suppressive role in squamous cell carcinoma via HSPA5 restraint.\",\n      \"evidence\": \"ChIP, protein stability assays in HCC; lysosomal fractionation and macropinocytosis assays; luciferase reporter on p110α promoter; NRF3-deficient mouse SCC models with HSPA5 co-IP and pharmacological rescue\",\n      \"pmids\": [\"37350063\", \"36818298\", \"37720674\", \"37807968\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Tissue-specific determinants of oncogenic versus tumor-suppressive NRF3 function unresolved\", \"Whether ISGylation and 20S proteasome routes to p53 degradation are redundant or tissue-specific unknown\", \"Each axis from a single laboratory\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"In the heart, NFE2L3 was shown to epigenetically silence Pitx2 by recruiting an hnRNPK–DNMT1 complex to the Pitx2 promoter, increasing DNA methylation and thereby promoting cardiomyocyte apoptosis via mitochondrial ROS after injury — establishing NRF3 as an epigenetic regulator beyond classical transcriptional activation.\",\n      \"evidence\": \"CM-specific and global Nrf3 KO mice, MI and I/R models, ChIP-seq, IP-mass spectrometry identifying hnRNPK and DNMT1, AAV rescue\",\n      \"pmids\": [\"40099370\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether hnRNPK–DNMT1 recruitment is a general mechanism at other NRF3 targets unknown\", \"Role of Maf partners in cardiac context not examined\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"In vascular injury, NFE2L3 (induced by ATF4 under ER stress) transcriptionally activates Trim5 to trigger VSMC autophagy and neointimal hyperplasia, validated by VSMC-specific KO and therapeutic perivascular NRF3 inhibition, linking the ER stress–DDI2–NRF3 axis to vascular disease.\",\n      \"evidence\": \"Global and VSMC-specific Nrf3 KO mice, wire-injury and porcine stenting models, ChIP, transcriptomics, perivascular inhibitor delivery\",\n      \"pmids\": [\"40377016\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ATF4 binding to Nrf3 promoter not shown by ChIP\", \"Whether DDI2 cleavage is required in this vascular context not tested\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Post-transcriptional regulation of NFE2L3 mRNA was established: METTL3-mediated m6A modification stabilizes NFE2L3 mRNA to activate Wnt signaling in lung adenocarcinoma, and NAT10-mediated ac4C acetylation stabilizes NFE2L3 mRNA to drive AKT/GSK3β/β-catenin signaling in ccRCC, revealing epitranscriptomic control of NRF3 expression.\",\n      \"evidence\": \"m6A-RIP-seq, ac4C-RIP-seq, RNA stability assays, KD/OE of METTL3 and NAT10, WNT and AKT pathway assays, xenograft models\",\n      \"pmids\": [\"40249818\", \"40169553\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Specific m6A and ac4C sites on NFE2L3 mRNA not mapped at single-nucleotide resolution\", \"Whether these modifications operate in non-cancer physiology unknown\", \"Each finding from a single laboratory\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key open questions include: (1) the structural basis for DDI2-mediated NRF3 cleavage and how ER stress activates DDI2; (2) what determines whether NRF3 acts as an oncogene or tumor suppressor in different tissue contexts; (3) whether the hnRNPK–DNMT1 epigenetic silencing mechanism generalizes beyond the Pitx2 locus; and (4) a comprehensive ChIP-seq-defined cistrome across tissues to unify the diverse transcriptional programs attributed to NRF3.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No crystal or cryo-EM structure of NRF3 or NRF3–DDI2 complex\", \"No systematic loss-of-function screen across tissues to define context-dependent gene programs\", \"No Mendelian disease association established\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 2, 5, 10, 11, 13, 15, 20]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 1, 2, 5, 6, 10, 11, 14, 15, 20, 24]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005783\", \"supporting_discovery_ids\": [3, 4]},\n      {\"term_id\": \"GO:0005635\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"GO:0005654\", \"supporting_discovery_ids\": [4, 8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 1, 2, 5, 10, 11, 15, 20]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [3, 7, 8, 11, 13]},\n      {\"term_id\": \"R-HSA-8953897\", \"supporting_discovery_ids\": [4, 8, 21]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [9, 20]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [12, 17, 19, 23, 24]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [15, 21]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [11, 16, 17, 19]}\n    ],\n    \"complexes\": [\n      \"NRF3–small Maf heterodimer (MafK, MAFG, MAFF)\",\n      \"hnRNPK–DNMT1–NRF3 epigenetic silencing complex\"\n    ],\n    \"partners\": [\n      \"MAFK\",\n      \"MAFG\",\n      \"FBW7\",\n      \"DDI2\",\n      \"HRD1\",\n      \"VCP\",\n      \"HSPA5\",\n      \"HNRNPK\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}