{"gene":"RELA","run_date":"2026-06-10T06:43:36","timeline":{"discoveries":[{"year":2002,"finding":"p300 and CBP acetyltransferases acetylate RelA principally at lysines 218, 221, and 310. Acetylation at K221 enhances DNA binding and impairs IκBα assembly, while acetylation at K310 is required for full transcriptional activity without affecting DNA binding or IκBα assembly.","method":"In vitro acetylation assay, lysine-to-arginine mutagenesis, dominant-negative p300 co-expression, co-immunoprecipitation","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1 / Strong — reconstitution in vitro plus site-directed mutagenesis at multiple residues with distinct functional readouts; rigorous controls with dominant-negative p300","pmids":["12456660"],"is_preprint":false},{"year":2005,"finding":"Phosphorylation of RelA at serine 276 (by MSK1/PKA) or serine 536 (by IKK1/IKK2) promotes assembly of phospho-RelA with p300, thereby enhancing p300-mediated acetylation of RelA at lysine 310, which increases transcriptional activity. Catalytically inactive IKK or PKA mutants blocked K310 acetylation.","method":"Anti-acetyl-K310 RelA antibody, in vitro p300 acetylation assay, catalytically inactive kinase mutants, RelA-deficient MEF reconstitution, chromatin immunoprecipitation (E-selectin promoter)","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro acetylation plus mutagenesis plus cell-based reconstitution with multiple orthogonal methods in one study","pmids":["16135789"],"is_preprint":false},{"year":2001,"finding":"Protein phosphatase 2A (PP2A) physically associates with RelA via its PR65 (subunit A) subunit through both the N- and C-terminal regions of RelA, and the purified PP2A core enzyme directly dephosphorylates RelA in a concentration-dependent manner.","method":"Co-immunoprecipitation, in vitro dephosphorylation assay with purified PP2A, okadaic acid inhibitor studies","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro enzymatic reconstitution plus co-IP with domain mapping; single lab but multiple orthogonal methods","pmids":["11591705"],"is_preprint":false},{"year":2013,"finding":"The DNA-binding domain of RelA interacts with the KIX domain of CBP/p300, and the transcriptional activation domain (TA2) of RelA binds the TAZ1 domain of CBP/p300. NMR structure of RelA-TA2:TAZ1 complex shows RelA-TA2 folds upon binding through conserved hydrophobic sites. Ser276 phosphorylation is prerequisite for the KIX interaction. Both interactions together control a large set of RelA-activated genes and regulate the NF-κB negative feedback loop through IκBα.","method":"NMR structure determination, isothermal calorimetry, RelA point mutants, genome-wide gene expression analysis, chromatin immunoprecipitation, mathematical modeling","journal":"PLoS biology","confidence":"High","confidence_rationale":"Tier 1 / Strong — NMR structure plus mutagenesis plus ITC plus genome-wide functional validation; multiple orthogonal methods in one study","pmids":["24019758"],"is_preprint":false},{"year":2009,"finding":"RSV infection activates cytoplasmic MSK1 in a reactive-oxygen-species-dependent manner; MSK1 phosphorylates RelA at Ser276, which is required for RSV-induced NF-κB-dependent gene expression. A RelA S276A mutation in RelA−/− MEFs failed to support RSV-induced cytokine gene expression.","method":"Site-directed mutagenesis (S276A), siRNA knockdown of MSK1, ROS inhibition, reconstitution of RelA−/− MEFs, NF-κB reporter assays","journal":"Journal of virology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — mutagenesis plus reconstitution plus siRNA knockdown with specific gene expression readouts; single lab, multiple orthogonal methods","pmids":["19706715"],"is_preprint":false},{"year":2013,"finding":"PPM1A (a PP2C family phosphatase) directly dephosphorylates RelA at S536 and S276 in vitro and in cells, selectively inhibiting NF-κB transcriptional activity and decreasing expression of MCP-1/CCL2 and IL-6. PPM1A depletion enhanced NF-κB-dependent cell invasion.","method":"In vitro phosphatase assay, immunoblotting with phospho-specific antibodies, siRNA knockdown, invasion assays, mouse metastasis model","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro phosphatase reconstitution plus cell-based loss-of-function with multiple readouts; single lab","pmids":["23812431"],"is_preprint":false},{"year":2016,"finding":"PRMT1 (type I protein arginine methyltransferase 1) directly interacts with the Rel homology domain of RelA and asymmetrically dimethylates RelA at R30, a residue in the DNA-binding L1 loop, inhibiting RelA binding to DNA and repressing NF-κB target genes in response to TNFα.","method":"Co-immunoprecipitation, in vitro methylation assay, molecular dynamics simulation, mutagenesis, chromatin immunoprecipitation","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro enzymatic methylation plus mutagenesis plus structural modeling plus functional gene expression readouts; single lab","pmids":["27051065"],"is_preprint":false},{"year":2012,"finding":"TIP60 histone acetyltransferase interacts with RelA/p65 via its HAT domain and maintains acetylated K310 RelA levels in the TNFα-dependent NF-κB signaling pathway, facilitating sequential recruitment of acetyl-K310 RelA to IL-6, IL-8, c-IAP1, and XIAP promoters with concomitant H3/H4 acetylation.","method":"Co-immunoprecipitation, chromatin immunoprecipitation, reporter assays, western blotting","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP plus ChIP plus functional reporter assays; TIP60 does not directly acetylate RelA (negative finding); single lab","pmids":["22249179"],"is_preprint":false},{"year":2010,"finding":"Stress-induced nucleolar translocation of RelA is preceded by ubiquitination of RelA. COMMD1 binds RelA in response to stress and acts as a rate-limiting component of the RelA ubiquitin ligase complex; COMMD1 overexpression promotes nucleolar targeting of RelA while knockdown blocks it, retaining RelA in the nucleoplasm. The nucleolar localization signal (amino acids 27–30) is critical for ubiquitination.","method":"Co-immunoprecipitation, siRNA knockdown, overexpression, fluorescence microscopy, domain mutagenesis","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus loss- and gain-of-function plus localization with functional consequence; single lab","pmids":["20048074"],"is_preprint":false},{"year":2011,"finding":"Direct targeting of RelA to the nucleolus (via a viral NoLS-RelA fusion) induces apoptosis independently of NF-κB transcriptional activity. This requires nucleophosmin (NPM/B23.1): nucleolar RelA causes NPM relocalization from the nucleolus to the cytoplasm, and cytoplasmic NPM facilitates mitochondrial accumulation of BAX to mediate apoptosis.","method":"Viral NoLS-RelA fusion construct, siRNA knockdown of NPM, subcellular fractionation, live-cell imaging, TUNEL assay, BAX mitochondrial accumulation assay","journal":"Cell death and differentiation","confidence":"High","confidence_rationale":"Tier 2 / Strong — engineered fusion protein for direct targeting, epistasis via NPM knockdown, multiple orthogonal readouts (localization, BAX accumulation, apoptosis); single lab but comprehensive","pmids":["21660047"],"is_preprint":false},{"year":2014,"finding":"C11orf95-RELA fusion proteins (arising from chromothripsis of chromosome 11q13.1) translocate spontaneously to the nucleus to activate NF-κB target genes and transform neural stem cells to form ependymomas in mice, establishing the fusion as an oncogenic driver of canonical NF-κB signaling.","method":"Fusion protein expression, nuclear translocation assay, neural stem cell transformation, mouse tumor model, gene expression analysis","journal":"Nature","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct functional characterization of fusion protein in cell and mouse models; replicated in human tumor context","pmids":["24553141"],"is_preprint":false},{"year":2021,"finding":"ZFTA-RELA (ZRfus) fusion activates NF-κB target genes and binds thousands of unique genomic sites enriched with PLAGL transcription factor motifs beyond canonical κB sites. ZRfus recruits transcriptional coactivators BRD4, EP300, CBP, and Pol2 to activate neoplastic transcriptional programs involving MAPK, focal adhesion, and gene imprinting networks.","method":"CUT&RUN, ChIP-seq, ATAC-seq, RNA-seq, pharmacological inhibition of BRD4/EP300/CBP, autochthonous mouse tumor model via in utero electroporation","journal":"Cancer discovery","confidence":"High","confidence_rationale":"Tier 2 / Strong — integrative multi-omics plus mouse model plus pharmacological inhibition; comprehensive mechanistic characterization","pmids":["33741710"],"is_preprint":false},{"year":2021,"finding":"In senescent cells, DNA double-strand breaks activate two mechanistically distinct phases of NF-κB: an early IKK/proteasome-dependent phase controlling anti-apoptotic genes, and a late IKK- and proteasome-independent phase driven by altered phosphorylation of RelA/p65 (in part via GSK3β) that silences NFKBIA transcription to constitutively activate NF-κB for SASP gene expression.","method":"RNA-sequencing, genetic KO (NFKBIA), pharmacological inhibition (IKK, proteasome, GSK3β), phospho-specific immunoblotting, in vitro and in vivo senescence models","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic and pharmacological dissection with RNA-seq and multiple functional readouts; mechanistically distinct phases established by orthogonal inhibitors","pmids":["33459422"],"is_preprint":false},{"year":2020,"finding":"The enzyme CAD deamidates the RelA subunit of NF-κB in cancer cells; this post-translational modification switches RelA function from NF-κB-responsive inflammatory gene expression to glycolytic enzyme expression, promoting aerobic glycolysis and cell proliferation.","method":"In vitro deamidation assay, mass spectrometry, RELA mutant expression, glycolytic enzyme expression profiling, cancer cell line survey, glycolytic enzyme inhibition","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro enzymatic modification plus mutagenesis plus functional gene expression switch; single lab, multiple orthogonal methods","pmids":["32325032"],"is_preprint":false},{"year":2012,"finding":"LPS stimulation in macrophages promotes PARP-1 binding to RelA/p65 and poly(ADP-ribosyl)ation of RelA, which upregulates NF-κB transcriptional activity and proinflammatory cytokine expression. ERK-dependent phosphorylation of PARP-1 mediates this PARP-1–RelA interaction.","method":"Co-immunoprecipitation, signal pathway inhibitors (ERK inhibitor), reporter assays, cytokine mRNA quantification","journal":"Human immunology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — co-IP plus pharmacological inhibition plus functional readouts; mechanism established in cell culture but no in vitro reconstitution","pmids":["22391342"],"is_preprint":false},{"year":2017,"finding":"EGF stimulation induces PKCε-dependent phosphorylation of MIIP at Ser303; phospho-MIIP interacts with nuclear RelA, preventing HDAC6-mediated deacetylation of RelA and thereby enhancing RelA transcriptional activity and colorectal cancer metastasis. PP1 mediates MIIP-S303 dephosphorylation to oppose this process.","method":"Co-immunoprecipitation, phospho-specific antibodies, siRNA knockdown, kinase assay, HDAC6 deacetylation assay, metastasis assays","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP plus enzymatic assay (HDAC6 deacetylation) plus kinase assay plus functional metastasis readout; single lab with multiple orthogonal methods","pmids":["29038521"],"is_preprint":false},{"year":2009,"finding":"p65/RelA directly binds a conserved κB site in the BECN1 (Atg6) promoter both in vitro and in living cells (ChIP in PMA-ionomycin–stimulated Jurkat cells), upregulating BECN1 mRNA and protein and increasing autophagy.","method":"EMSA, chromatin immunoprecipitation, luciferase reporter, siRNA knockdown, autophagy assays","journal":"Molecular and cellular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — EMSA plus ChIP plus functional autophagy readout; single lab","pmids":["19289499"],"is_preprint":false},{"year":2009,"finding":"RelA/p65 is required for cellular senescence maintenance: RelA/p65−/− primary fibroblasts immortalize faster than wild-type cells, accompanied by genomic instability (increased DNA mutations, gene deletions, chromosomal translocations) linked to compromised DNA repair.","method":"RelA/p65 knockout fibroblasts, senescence assays, comet assay, chromosomal analysis, DNA repair functional assays","journal":"EMBO reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with defined cellular phenotype (senescence, DNA repair) validated in both mouse and human fibroblasts; single lab","pmids":["19779484"],"is_preprint":false},{"year":1996,"finding":"RelA (p65) and the progesterone receptor (PR) physically interact in vitro, and this interaction mediates mutual transcriptional repression: RelA represses PR-activated transcription and PR represses TNFα-induced NF-κB/RelA activity.","method":"In vitro protein–protein interaction assay, transient transfection reporter assays, TNFα stimulation","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro pull-down plus functional reporter assays; single lab, multiple cell types and reporter constructs","pmids":["8626413"],"is_preprint":false},{"year":1996,"finding":"RelA (p65) and androgen receptor (AR) mutually repress each other's transcriptional activity; a weak AR–RelA protein–protein interaction was detected. RelA-mediated repression involves the AR N-terminal region (residue 297 to DNA-binding domain). The repression is not mediated through IκBα upregulation or reciprocal reduction of protein levels, nor through significant mutual inhibition of DNA binding.","method":"Transient transfection reporter assays, EMSA, immunoblotting, in vitro protein–protein interaction","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — reporter assays plus EMSA plus weak pull-down; interaction is weak; single lab","pmids":["8798655"],"is_preprint":false},{"year":2005,"finding":"RelA/p65 stabilizes IκBβ protein from 26S proteasome-mediated degradation, a process mediated largely through the RelA C-terminal domain. In RelA/p65−/− fibroblasts, IκBβ is profoundly reduced (more than IκBα). A proteolysis-resistant form of IκBβ but not IκBα causes severe growth defect and apoptosis in RelA/p65−/− fibroblasts.","method":"RelA/p65 KO fibroblasts, reconstitution with RelA C-terminal truncations, proteasome inhibitor studies, apoptosis assays","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — genetic KO plus domain mutagenesis plus rescue experiments with clear mechanistic readout; single lab with multiple orthogonal approaches","pmids":["15923614"],"is_preprint":false},{"year":1998,"finding":"RelA and C/EBPβ form a cooperative DNA-binding complex on a composite NF-κB/C/EBP element in the ICAM-1 promoter. Complex formation requires intact C/EBP and NF-κB binding sites, depends on nuclear translocation of RelA, was demonstrated with recombinant proteins, and is cell-type specific (present in A549/HeLa/EVC304 but not Jurkat/Raji cells). This complex synergistically activates ICAM-1 promoter in response to TNFα.","method":"EMSA with recombinant proteins, co-immunoprecipitation from nuclear extracts, reporter assays, TNFα stimulation","journal":"Cell growth & differentiation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — EMSA with recombinant proteins plus co-IP from endogenous extracts plus functional reporter assays; single lab","pmids":["9831247"],"is_preprint":false},{"year":2014,"finding":"RIP3 kinase-dead mutant expression induces caspase-dependent cleavage of RelA/p65 (at least partially by caspase-6), and a non-cleavable RelA D361E mutant rescues cells from apoptosis, establishing that caspase-mediated cleavage of RelA is required for RIP3-KD–induced apoptosis in leukemia cells.","method":"RIP3-KD overexpression, caspase inhibitor assays, non-cleavable RelA D361E mutant rescue, immunoblotting","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mutagenesis rescue experiment plus caspase inhibitor epistasis; single lab","pmids":["25144719"],"is_preprint":false},{"year":2015,"finding":"FOXO3 binds NF-κB RelA in the cytosol, preventing FOXO3 degradation and preventing RelA nuclear translocation. The interaction site was mapped near the FOXO3 transactivation domain; deletion of the FOXO3 DNA-binding domain sequence restored RelA activation.","method":"Co-immunoprecipitation, subcellular fractionation, domain deletion constructs, NF-κB reporter assays in tumor-associated dendritic cells","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus domain mapping plus functional nuclear translocation assay; single lab","pmids":["26561547"],"is_preprint":false},{"year":2015,"finding":"Hepatic NF-κB/RelA inhibits PDE3B transcription through three DNA-binding sites in the PDE3B gene promoter in response to TNFα, thereby maintaining elevated intracellular cAMP; deletion of liver p65 in mice increases PDE3B expression and improves hepatic insulin sensitivity on a high-fat diet.","method":"Liver-specific p65 knockout mice (Alb-cre × floxed-p65), ChIP, promoter reporter assay, metabolic phenotyping","journal":"Diabetes","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional KO mouse model plus ChIP plus reporter assay; clear in vivo mechanistic readout","pmids":["26038580"],"is_preprint":false},{"year":2012,"finding":"Proline-rich tyrosine kinase 2 (Pyk2) promotes RelA/p65 phosphorylation at Ser536 (via IKK) and facilitates nuclear translocation of RelA in thrombin-stimulated endothelial cells; Pyk2 knockdown blocked RelA nuclear translocation even when IκBα degradation still occurred.","method":"siRNA knockdown of Pyk2, IKKα/β, phospho-specific immunoblotting, nuclear translocation assay, NF-κB reporter, VCAM-1/MCP-1 expression","journal":"American journal of respiratory cell and molecular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — siRNA knockdown with multiple readouts (phosphorylation, translocation, target gene expression); dissociation of IκBα degradation from nuclear translocation is mechanistically informative; single lab","pmids":["22842493"],"is_preprint":false},{"year":2012,"finding":"In hypoxia, only the RelA NF-κB subunit and IκBα localize to mitochondria (specifically the mitoplast containing mtDNA); p50 is found in the ER. Hypoxia-induced mitochondrial RelA and IκBα accumulation requires ROS and STAT3 but not HIF1α or intracellular Ca2+ release. STAT3 inhibition blocks RelA mitochondrial localization.","method":"Mitochondrial fractionation, protease protection (mitoplast isolation), hypoxia treatment, STAT3 inhibitor, ROS scavenger, immunoblotting","journal":"Bioscience reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — subcellular fractionation with mitoplast isolation plus pharmacological dissection of upstream signals; single lab","pmids":["31484794"],"is_preprint":false},{"year":2013,"finding":"ASPP2 enhances nuclear RelA/p65 activity by binding IκB, and nuclear RelA/p65 mediates transcriptional repression of ΔNp63 expression in keratinocytes, thereby suppressing squamous cell carcinoma development.","method":"Co-immunoprecipitation (ASPP2-IκB), reporter assays, genetic epistasis (ASPP2 haploinsufficiency + p63 heterozygosity mouse model), NF-κB activity assays","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis in mouse model plus co-IP plus reporter assays; single lab","pmids":["24127607"],"is_preprint":false},{"year":2011,"finding":"CD28-induced NF-κB signals mediate FOXP3 transcription in human CD4+ T cells via nuclear translocation of RelA (not c-Rel). RelA dimers occupy novel κB-binding sites on the FOXP3 gene, correlating with histone acetylation and Pol II recruitment; RelA knockdown significantly reduces CD28-costimulated FOXP3 expression.","method":"ChIP, EMSA, siRNA knockdown, flow cytometry, reporter assays, primary T cell stimulation","journal":"European journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus EMSA plus siRNA knockdown in primary human T cells; single lab","pmids":["21268019"],"is_preprint":false},{"year":2023,"finding":"Heterozygous dominant-negative truncating RELA mutations (in the 3' segment) produce truncated RelA proteins lacking full transactivation domains; these exert a dominant-negative effect and lead to enhanced TLR7-driven type I/III IFN secretion and interferon-stimulated gene expression in patient pDCs and myeloid cells, establishing a type I interferonopathy mechanism.","method":"Patient cell functional studies, TLR7 stimulation assays, mRNA expression (TLR7, MYD88), cytokine secretion assays, dominant-negative RelA expression in RelA−/− MEFs","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — patient-derived cells plus MEF reconstitution with dominant-negative mutant; multiple functional readouts across multiple families","pmids":["37273177"],"is_preprint":false},{"year":2017,"finding":"Embryonic lethality of RelA-deficient mice is mediated by both apoptosis and necroptosis: deletion of Rip3 or Mlkl partially prevents it, while combined ablation of Fadd and Rip3/Mlkl or blocking RIP1 kinase activity fully rescues embryonic lethality, placing RelA upstream of both cell death pathways.","method":"Genetic epistasis using RelA/Rip3, RelA/Mlkl, RelA/Fadd/Rip3 triple-knockout mice; RIP1 kinase-dead knock-in (RIP1K45A)","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean genetic epistasis with multiple double/triple KO combinations establishing pathway hierarchy; rigorous in vivo model","pmids":["29167229"],"is_preprint":false},{"year":2020,"finding":"TNF-induced NFκB/RelA dynamics control necroptosis decisions via an incoherent feedforward loop: RelA-driven inducible expression of TNFAIP3/A20 interferes with the RIPK3-containing necrosome complex, protecting a fraction of cells from transient TNF exposure. Dysregulated NF-κB dynamics diminish TNF-induced necroptosis.","method":"Live-cell microscopy, mathematical modeling of death kinetics, A20 inducible expression, RIPK3 complex analysis","journal":"Molecular systems biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live-cell imaging plus model-aided circuit analysis plus A20 functional studies; single lab","pmids":["33314666"],"is_preprint":false},{"year":2024,"finding":"High glucose induces formation of a RELA/p65–HDAC8 complex that binds the PRKN (Parkin) promoter and represses PRKN expression, impairing mitophagy; sodium butyrate (NaB) blocks RELA nuclear translocation and directly inhibits nuclear HDAC8, restoring PRKN expression and mitophagy.","method":"ChIP assay (RELA-HDAC8 at PRKN promoter), co-immunoprecipitation (RELA-HDAC8 complex), HDAC8 overexpression, NaB treatment, mitophagy assays, diabetic mouse model","journal":"Autophagy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus co-IP plus HDAC8 overexpression rescue with functional mitophagy readout; single lab","pmids":["38409852"],"is_preprint":false},{"year":2015,"finding":"ZBTB2 represses RelA/p65 gene transcription by inhibiting Sp1 binding to a GC-box (bp -31 to -21) in the RelA/p65 proximal promoter. Reduced RelA/p65 expression by ZBTB2 indirectly increases PDK4 expression (through relief of RelA-mediated PGC1α repression), reprogramming glucose metabolism toward glycolysis.","method":"Reporter assays with promoter deletions and mutations, EMSA, ChIP, siRNA knockdown, metabolic flux analysis","journal":"Nucleic acids research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — EMSA plus ChIP plus reporter mutagenesis plus metabolic readout; single lab","pmids":["25609694"],"is_preprint":false},{"year":2019,"finding":"Under hypoxia, NF-κB (RelA/p65) represses ZBTB7A transcription by binding NF-κB-binding elements in the ZBTB7A 5'-upstream regulatory region, downregulating the transcriptional repressor FBI-1, which in turn derepresses SLC16A3 (MCT4) expression to increase lactate efflux and colon cancer cell growth.","method":"ChIP, transient transfection/reporter assays, oligonucleotide pulldowns, hypoxia cell treatments, mRNA/protein expression analysis","journal":"Biochimica et biophysica acta. Gene regulatory mechanisms","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus reporter assays plus functional cell growth readout; single lab","pmids":["31271899"],"is_preprint":false}],"current_model":"RELA/RelA (p65) is the principal effector subunit of canonical NF-κB: it is maintained in the cytoplasm by IκB proteins, translocates to the nucleus upon IκB degradation, and its transcriptional activity is fine-tuned by a complex code of post-translational modifications—including site-specific phosphorylation (S276 by MSK1/PKA, S536 by IKK) that promotes assembly with the coactivators CBP/p300 and subsequent acetylation (K221 enhancing DNA binding/impairing IκBα reassembly; K310 required for full transcriptional activity), arginine dimethylation (R30 by PRMT1, inhibiting DNA binding), deamidation (by CAD, switching target gene selectivity toward glycolytic enzymes), and dephosphorylation (by PP2A and PPM1A); RelA also directly regulates its own inhibitor IκBβ stability, engages coactivators TIP60 and CBP/p300 through its transactivation domain (structure resolved by NMR), interacts with diverse partners including C/EBPβ, FOXO3, COMMD1, and nuclear receptors; under stress, RelA undergoes nucleolar translocation (regulated by COMMD1-dependent ubiquitination) to induce apoptosis through NPM/BAX, and localizes to mitochondria in a ROS/STAT3-dependent manner; oncogenic C11orf95/ZFTA-RELA fusion proteins constitutively enter the nucleus to activate NF-κB and neoplastic transcriptional programs in ependymoma; and loss-of-function RELA mutations cause autoinflammatory disease via impaired NF-κB signaling and enhanced type I interferon production."},"narrative":{"mechanistic_narrative":"RELA/RelA (p65) is the principal transcriptional effector of canonical NF-κB signaling, held inactive in the cytoplasm and released to drive inflammatory, metabolic, and cell-fate gene programs upon stimulus [PMID:9831247, PMID:22842493]. Its activity is governed by a dense post-translational code: IKK- or MSK1/PKA-dependent phosphorylation at Ser536 and Ser276 licenses assembly with the coactivators CBP/p300, which acetylate RelA at K221 (enhancing DNA binding and impairing IκBα reassembly) and K310 (required for full transcriptional activity) [PMID:12456660, PMID:16135789, PMID:24019758]. Structurally, the RelA transactivation domain (TA2) folds upon binding the TAZ1 domain of CBP/p300 while its DNA-binding domain engages the KIX domain in a Ser276-phosphorylation-dependent manner, coordinating activation of large gene sets and the IκBα-mediated negative feedback loop [PMID:24019758]. This activating code is opposed by dephosphorylation (PP2A, PPM1A) and by PRMT1-mediated arginine dimethylation at R30 in the DNA-binding loop, which blocks DNA binding [PMID:11591705, PMID:23812431, PMID:27051065], while TIP60 sustains acetyl-K310 levels and MIIP shields RelA from HDAC6 deacetylation [PMID:22249179, PMID:29038521]. Beyond canonical inflammation, deamidation by CAD reprograms RelA toward glycolytic gene expression, and RelA represses or activates target promoters governing autophagy (BECN1), metabolism (PDE3B, PRKN, ZBTB7A), regulatory T cell identity (FOXP3), and senescence-associated programs [PMID:32325032, PMID:19289499, PMID:26038580, PMID:21268019, PMID:38409852, PMID:31271899, PMID:33459422]. RelA also acts non-transcriptionally: stress drives COMMD1-dependent ubiquitination and nucleolar translocation that triggers NPM/BAX-dependent apoptosis, and it sits upstream of both apoptotic and necroptotic cell-death pathways via A20/RIPK3 control [PMID:20048074, PMID:21660047, PMID:29167229, PMID:33314666]. Oncogenic C11orf95/ZFTA-RELA fusions enter the nucleus constitutively to activate NF-κB and neoplastic transcriptional programs in ependymoma, while dominant-negative truncating RELA mutations cause an autoinflammatory type I interferonopathy through impaired NF-κB and enhanced TLR7-driven interferon production [PMID:24553141, PMID:33741710, PMID:37273177].","teleology":[{"year":1996,"claim":"Established that RelA engages in mutually repressive crosstalk with nuclear hormone receptors, defining an early mechanism for integrating inflammatory and endocrine signaling.","evidence":"In vitro protein interaction and reporter assays with progesterone and androgen receptors","pmids":["8626413","8798655"],"confidence":"Medium","gaps":["Interaction with AR is weak","Structural basis of mutual repression undefined","Not tied to specific endogenous target genes"]},{"year":1998,"claim":"Showed RelA cooperates combinatorially with other transcription factors on composite promoter elements, explaining cell-type-specific target gene selection.","evidence":"EMSA with recombinant proteins and reporter assays on the ICAM-1 promoter NF-κB/C/EBP element","pmids":["9831247"],"confidence":"Medium","gaps":["Basis of cell-type specificity not resolved","No structure of the cooperative complex"]},{"year":2002,"claim":"Resolved that site-specific acetylation by p300/CBP encodes distinct functional outputs, transforming RelA from a binary switch into a tunable transcription factor.","evidence":"In vitro acetylation, K-to-R mutagenesis, and dominant-negative p300 in cells","pmids":["12456660"],"confidence":"High","gaps":["Deacetylase counterparts not identified here","In vivo stoichiometry of modifications unknown"]},{"year":2005,"claim":"Linked upstream phosphorylation to downstream acetylation, establishing an ordered modification cascade controlling RelA activation.","evidence":"Phospho-specific antibodies, catalytically inactive IKK/PKA mutants, RelA-/- MEF reconstitution, ChIP","pmids":["16135789","15923614"],"confidence":"High","gaps":["Quantitative kinetics of the cascade undefined","Stoichiometric coupling in vivo not measured"]},{"year":2001,"claim":"Identified phosphatases as direct negative regulators, showing RelA phosphorylation is reversible and actively opposed.","evidence":"Co-IP with domain mapping and in vitro dephosphorylation with purified PP2A; later in vitro PPM1A phosphatase assays","pmids":["11591705","23812431"],"confidence":"High","gaps":["Site specificity of PP2A on RelA not fully resolved","Physiological triggers of dephosphorylation undefined"]},{"year":2009,"claim":"Demonstrated RelA's transcriptional reach beyond inflammation into autophagy and senescence, and its requirement for genomic stability.","evidence":"ChIP/EMSA at the BECN1 promoter and RelA-/- fibroblast senescence and DNA-repair assays","pmids":["19289499","19779484"],"confidence":"Medium","gaps":["Mechanism linking RelA loss to DNA repair defects unresolved","Direct repair targets not identified"]},{"year":2010,"claim":"Revealed a non-canonical stress pathway in which COMMD1-dependent ubiquitination drives RelA into the nucleolus, decoupling RelA localization from transcription.","evidence":"Co-IP, gain/loss-of-function, NoLS mutagenesis, and fluorescence microscopy; followed by NoLS-RelA fusion epistasis with NPM knockdown","pmids":["20048074","21660047"],"confidence":"High","gaps":["Identity of the full ubiquitin ligase complex incomplete","Physiological stress signals targeting RelA to nucleolus undefined"]},{"year":2013,"claim":"Provided the structural basis for RelA-coactivator engagement, explaining how phosphorylation gates coactivator recruitment genome-wide.","evidence":"NMR structure of RelA-TA2:TAZ1, ITC, point mutants, and genome-wide expression/ChIP analysis","pmids":["24019758"],"confidence":"High","gaps":["Full ternary architecture with DNA not resolved","Dynamics of KIX vs TAZ1 occupancy in vivo unclear"]},{"year":2014,"claim":"Identified an oncogenic gain-of-function in which a fusion protein constitutively activates the canonical RelA program to drive ependymoma.","evidence":"C11orf95-RELA fusion expression, neural stem cell transformation, and mouse tumor models","pmids":["24553141"],"confidence":"High","gaps":["Contribution of the C11orf95 moiety to genomic targeting not yet defined here"]},{"year":2016,"claim":"Added arginine methylation as a repressive mark directly inhibiting RelA DNA binding, broadening the modification code beyond phospho/acetyl.","evidence":"Co-IP, in vitro PRMT1 methylation, MD simulation, mutagenesis, and ChIP","pmids":["27051065"],"confidence":"High","gaps":["Demethylase counterpart not identified","Crosstalk with acetylation at neighboring residues unexplored"]},{"year":2020,"claim":"Showed deamidation reprograms RelA target selectivity toward glycolysis, connecting NF-κB modification to cancer metabolism.","evidence":"In vitro CAD deamidation, mass spectrometry, RELA mutants, and glycolytic gene profiling across cancer lines","pmids":["32325032"],"confidence":"High","gaps":["Reversal of deamidation not addressed","Structural impact on DNA-binding specificity undefined"]},{"year":2021,"claim":"Defined how RelA fusion proteins seize non-canonical genomic sites and coactivators, and how RelA dynamics dictate cell-death decisions.","evidence":"Multi-omics of ZFTA-RELA with coactivator pharmacology and mouse models; live-cell imaging and modeling of A20/RIPK3 feedforward circuit","pmids":["33741710","33314666","33459422"],"confidence":"High","gaps":["Determinants of PLAGL-motif targeting by the fusion unresolved","Single-cell heterogeneity in death decisions incompletely mapped"]},{"year":2023,"claim":"Established that loss-of-function dominant-negative RELA mutations cause autoinflammatory disease through impaired NF-κB and excess type I interferon.","evidence":"Patient cell functional studies, TLR7 stimulation, and dominant-negative RelA expression in RelA-/- MEFs across families","pmids":["37273177"],"confidence":"High","gaps":["Mechanistic link between NF-κB loss and IFN gain not fully dissected","Genotype-phenotype correlation across mutation positions incomplete"]},{"year":null,"claim":"How the combinatorial post-translational code (phospho/acetyl/methyl/deamidation/PARylation), coactivator choice, and subcellular trafficking are integrated to select among RelA's divergent inflammatory, metabolic, autophagic, and cell-death gene programs in a given cell remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking modification state to genome-wide target selection","Quantitative crosstalk between competing modifications undefined","Cell-type determinants of canonical vs non-canonical RelA fate unclear"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[3,10,16,24,28,34]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,6,21,28]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[11]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[21,25,28]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[23,26]},{"term_id":"GO:0005730","term_label":"nucleolus","supporting_discovery_ids":[8,9]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[26]}],"pathway":[{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3,25]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[4,28,29]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,3,16,24]},{"term_id":"R-HSA-5357801","term_label":"Programmed Cell Death","supporting_discovery_ids":[9,30,31]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[10,11,29]},{"term_id":"R-HSA-9612973","term_label":"Autophagy","supporting_discovery_ids":[16,32]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[13,24,33,34]}],"complexes":["NF-κB (canonical RelA/p50)"],"partners":["CREBBP/EP300","PRMT1","PPP2R1A","PPM1A","COMMD1","CEBPB","FOXO3","KAT5"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q04206","full_name":"Transcription factor p65","aliases":["Nuclear factor NF-kappa-B p65 subunit","Nuclear factor of kappa light polypeptide gene enhancer in B-cells 3"],"length_aa":551,"mass_kda":60.2,"function":"NF-kappa-B is a pleiotropic transcription factor present in almost all cell types and is the endpoint of a series of signal transduction events that are initiated by a vast array of stimuli related to many biological processes such as inflammation, immunity, differentiation, cell growth, tumorigenesis and apoptosis. NF-kappa-B is a homo- or heterodimeric complex formed by the Rel-like domain-containing proteins RELA/p65, RELB, NFKB1/p105, NFKB1/p50, REL and NFKB2/p52. The heterodimeric RELA-NFKB1 complex appears to be most abundant one. The dimers bind at kappa-B sites in the DNA of their target genes and the individual dimers have distinct preferences for different kappa-B sites that they can bind with distinguishable affinity and specificity. Different dimer combinations act as transcriptional activators or repressors, respectively. The NF-kappa-B heterodimeric RELA-NFKB1 and RELA-REL complexes, for instance, function as transcriptional activators. NF-kappa-B is controlled by various mechanisms of post-translational modification and subcellular compartmentalization as well as by interactions with other cofactors or corepressors. NF-kappa-B complexes are held in the cytoplasm in an inactive state complexed with members of the NF-kappa-B inhibitor (I-kappa-B) family. In a conventional activation pathway, I-kappa-B is phosphorylated by I-kappa-B kinases (IKKs) in response to different activators, subsequently degraded thus liberating the active NF-kappa-B complex which translocates to the nucleus. The inhibitory effect of I-kappa-B on NF-kappa-B through retention in the cytoplasm is exerted primarily through the interaction with RELA. RELA shows a weak DNA-binding site which could contribute directly to DNA binding in the NF-kappa-B complex. Besides its activity as a direct transcriptional activator, it is also able to modulate promoters accessibility to transcription factors and thereby indirectly regulate gene expression. Associates with chromatin at the NF-kappa-B promoter region via association with DDX1. Essential for cytokine gene expression in T-cells (PubMed:15790681). The NF-kappa-B homodimeric RELA-RELA complex appears to be involved in invasin-mediated activation of IL-8 expression. Key transcription factor regulating the IFN response during SARS-CoV-2 infection (PubMed:33440148)","subcellular_location":"Nucleus; Cytoplasm","url":"https://www.uniprot.org/uniprotkb/Q04206/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/RELA","classification":"Not 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Acetylation at K221 enhances DNA binding and impairs IκBα assembly, while acetylation at K310 is required for full transcriptional activity without affecting DNA binding or IκBα assembly.\",\n      \"method\": \"In vitro acetylation assay, lysine-to-arginine mutagenesis, dominant-negative p300 co-expression, co-immunoprecipitation\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — reconstitution in vitro plus site-directed mutagenesis at multiple residues with distinct functional readouts; rigorous controls with dominant-negative p300\",\n      \"pmids\": [\"12456660\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Phosphorylation of RelA at serine 276 (by MSK1/PKA) or serine 536 (by IKK1/IKK2) promotes assembly of phospho-RelA with p300, thereby enhancing p300-mediated acetylation of RelA at lysine 310, which increases transcriptional activity. Catalytically inactive IKK or PKA mutants blocked K310 acetylation.\",\n      \"method\": \"Anti-acetyl-K310 RelA antibody, in vitro p300 acetylation assay, catalytically inactive kinase mutants, RelA-deficient MEF reconstitution, chromatin immunoprecipitation (E-selectin promoter)\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro acetylation plus mutagenesis plus cell-based reconstitution with multiple orthogonal methods in one study\",\n      \"pmids\": [\"16135789\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"Protein phosphatase 2A (PP2A) physically associates with RelA via its PR65 (subunit A) subunit through both the N- and C-terminal regions of RelA, and the purified PP2A core enzyme directly dephosphorylates RelA in a concentration-dependent manner.\",\n      \"method\": \"Co-immunoprecipitation, in vitro dephosphorylation assay with purified PP2A, okadaic acid inhibitor studies\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro enzymatic reconstitution plus co-IP with domain mapping; single lab but multiple orthogonal methods\",\n      \"pmids\": [\"11591705\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"The DNA-binding domain of RelA interacts with the KIX domain of CBP/p300, and the transcriptional activation domain (TA2) of RelA binds the TAZ1 domain of CBP/p300. NMR structure of RelA-TA2:TAZ1 complex shows RelA-TA2 folds upon binding through conserved hydrophobic sites. Ser276 phosphorylation is prerequisite for the KIX interaction. Both interactions together control a large set of RelA-activated genes and regulate the NF-κB negative feedback loop through IκBα.\",\n      \"method\": \"NMR structure determination, isothermal calorimetry, RelA point mutants, genome-wide gene expression analysis, chromatin immunoprecipitation, mathematical modeling\",\n      \"journal\": \"PLoS biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — NMR structure plus mutagenesis plus ITC plus genome-wide functional validation; multiple orthogonal methods in one study\",\n      \"pmids\": [\"24019758\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"RSV infection activates cytoplasmic MSK1 in a reactive-oxygen-species-dependent manner; MSK1 phosphorylates RelA at Ser276, which is required for RSV-induced NF-κB-dependent gene expression. A RelA S276A mutation in RelA−/− MEFs failed to support RSV-induced cytokine gene expression.\",\n      \"method\": \"Site-directed mutagenesis (S276A), siRNA knockdown of MSK1, ROS inhibition, reconstitution of RelA−/− MEFs, NF-κB reporter assays\",\n      \"journal\": \"Journal of virology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — mutagenesis plus reconstitution plus siRNA knockdown with specific gene expression readouts; single lab, multiple orthogonal methods\",\n      \"pmids\": [\"19706715\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"PPM1A (a PP2C family phosphatase) directly dephosphorylates RelA at S536 and S276 in vitro and in cells, selectively inhibiting NF-κB transcriptional activity and decreasing expression of MCP-1/CCL2 and IL-6. PPM1A depletion enhanced NF-κB-dependent cell invasion.\",\n      \"method\": \"In vitro phosphatase assay, immunoblotting with phospho-specific antibodies, siRNA knockdown, invasion assays, mouse metastasis model\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro phosphatase reconstitution plus cell-based loss-of-function with multiple readouts; single lab\",\n      \"pmids\": [\"23812431\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PRMT1 (type I protein arginine methyltransferase 1) directly interacts with the Rel homology domain of RelA and asymmetrically dimethylates RelA at R30, a residue in the DNA-binding L1 loop, inhibiting RelA binding to DNA and repressing NF-κB target genes in response to TNFα.\",\n      \"method\": \"Co-immunoprecipitation, in vitro methylation assay, molecular dynamics simulation, mutagenesis, chromatin immunoprecipitation\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro enzymatic methylation plus mutagenesis plus structural modeling plus functional gene expression readouts; single lab\",\n      \"pmids\": [\"27051065\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"TIP60 histone acetyltransferase interacts with RelA/p65 via its HAT domain and maintains acetylated K310 RelA levels in the TNFα-dependent NF-κB signaling pathway, facilitating sequential recruitment of acetyl-K310 RelA to IL-6, IL-8, c-IAP1, and XIAP promoters with concomitant H3/H4 acetylation.\",\n      \"method\": \"Co-immunoprecipitation, chromatin immunoprecipitation, reporter assays, western blotting\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP plus ChIP plus functional reporter assays; TIP60 does not directly acetylate RelA (negative finding); single lab\",\n      \"pmids\": [\"22249179\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Stress-induced nucleolar translocation of RelA is preceded by ubiquitination of RelA. COMMD1 binds RelA in response to stress and acts as a rate-limiting component of the RelA ubiquitin ligase complex; COMMD1 overexpression promotes nucleolar targeting of RelA while knockdown blocks it, retaining RelA in the nucleoplasm. The nucleolar localization signal (amino acids 27–30) is critical for ubiquitination.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, overexpression, fluorescence microscopy, domain mutagenesis\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus loss- and gain-of-function plus localization with functional consequence; single lab\",\n      \"pmids\": [\"20048074\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Direct targeting of RelA to the nucleolus (via a viral NoLS-RelA fusion) induces apoptosis independently of NF-κB transcriptional activity. This requires nucleophosmin (NPM/B23.1): nucleolar RelA causes NPM relocalization from the nucleolus to the cytoplasm, and cytoplasmic NPM facilitates mitochondrial accumulation of BAX to mediate apoptosis.\",\n      \"method\": \"Viral NoLS-RelA fusion construct, siRNA knockdown of NPM, subcellular fractionation, live-cell imaging, TUNEL assay, BAX mitochondrial accumulation assay\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — engineered fusion protein for direct targeting, epistasis via NPM knockdown, multiple orthogonal readouts (localization, BAX accumulation, apoptosis); single lab but comprehensive\",\n      \"pmids\": [\"21660047\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"C11orf95-RELA fusion proteins (arising from chromothripsis of chromosome 11q13.1) translocate spontaneously to the nucleus to activate NF-κB target genes and transform neural stem cells to form ependymomas in mice, establishing the fusion as an oncogenic driver of canonical NF-κB signaling.\",\n      \"method\": \"Fusion protein expression, nuclear translocation assay, neural stem cell transformation, mouse tumor model, gene expression analysis\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct functional characterization of fusion protein in cell and mouse models; replicated in human tumor context\",\n      \"pmids\": [\"24553141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"ZFTA-RELA (ZRfus) fusion activates NF-κB target genes and binds thousands of unique genomic sites enriched with PLAGL transcription factor motifs beyond canonical κB sites. ZRfus recruits transcriptional coactivators BRD4, EP300, CBP, and Pol2 to activate neoplastic transcriptional programs involving MAPK, focal adhesion, and gene imprinting networks.\",\n      \"method\": \"CUT&RUN, ChIP-seq, ATAC-seq, RNA-seq, pharmacological inhibition of BRD4/EP300/CBP, autochthonous mouse tumor model via in utero electroporation\",\n      \"journal\": \"Cancer discovery\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — integrative multi-omics plus mouse model plus pharmacological inhibition; comprehensive mechanistic characterization\",\n      \"pmids\": [\"33741710\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In senescent cells, DNA double-strand breaks activate two mechanistically distinct phases of NF-κB: an early IKK/proteasome-dependent phase controlling anti-apoptotic genes, and a late IKK- and proteasome-independent phase driven by altered phosphorylation of RelA/p65 (in part via GSK3β) that silences NFKBIA transcription to constitutively activate NF-κB for SASP gene expression.\",\n      \"method\": \"RNA-sequencing, genetic KO (NFKBIA), pharmacological inhibition (IKK, proteasome, GSK3β), phospho-specific immunoblotting, in vitro and in vivo senescence models\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic and pharmacological dissection with RNA-seq and multiple functional readouts; mechanistically distinct phases established by orthogonal inhibitors\",\n      \"pmids\": [\"33459422\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The enzyme CAD deamidates the RelA subunit of NF-κB in cancer cells; this post-translational modification switches RelA function from NF-κB-responsive inflammatory gene expression to glycolytic enzyme expression, promoting aerobic glycolysis and cell proliferation.\",\n      \"method\": \"In vitro deamidation assay, mass spectrometry, RELA mutant expression, glycolytic enzyme expression profiling, cancer cell line survey, glycolytic enzyme inhibition\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro enzymatic modification plus mutagenesis plus functional gene expression switch; single lab, multiple orthogonal methods\",\n      \"pmids\": [\"32325032\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"LPS stimulation in macrophages promotes PARP-1 binding to RelA/p65 and poly(ADP-ribosyl)ation of RelA, which upregulates NF-κB transcriptional activity and proinflammatory cytokine expression. ERK-dependent phosphorylation of PARP-1 mediates this PARP-1–RelA interaction.\",\n      \"method\": \"Co-immunoprecipitation, signal pathway inhibitors (ERK inhibitor), reporter assays, cytokine mRNA quantification\",\n      \"journal\": \"Human immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — co-IP plus pharmacological inhibition plus functional readouts; mechanism established in cell culture but no in vitro reconstitution\",\n      \"pmids\": [\"22391342\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"EGF stimulation induces PKCε-dependent phosphorylation of MIIP at Ser303; phospho-MIIP interacts with nuclear RelA, preventing HDAC6-mediated deacetylation of RelA and thereby enhancing RelA transcriptional activity and colorectal cancer metastasis. PP1 mediates MIIP-S303 dephosphorylation to oppose this process.\",\n      \"method\": \"Co-immunoprecipitation, phospho-specific antibodies, siRNA knockdown, kinase assay, HDAC6 deacetylation assay, metastasis assays\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP plus enzymatic assay (HDAC6 deacetylation) plus kinase assay plus functional metastasis readout; single lab with multiple orthogonal methods\",\n      \"pmids\": [\"29038521\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"p65/RelA directly binds a conserved κB site in the BECN1 (Atg6) promoter both in vitro and in living cells (ChIP in PMA-ionomycin–stimulated Jurkat cells), upregulating BECN1 mRNA and protein and increasing autophagy.\",\n      \"method\": \"EMSA, chromatin immunoprecipitation, luciferase reporter, siRNA knockdown, autophagy assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — EMSA plus ChIP plus functional autophagy readout; single lab\",\n      \"pmids\": [\"19289499\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"RelA/p65 is required for cellular senescence maintenance: RelA/p65−/− primary fibroblasts immortalize faster than wild-type cells, accompanied by genomic instability (increased DNA mutations, gene deletions, chromosomal translocations) linked to compromised DNA repair.\",\n      \"method\": \"RelA/p65 knockout fibroblasts, senescence assays, comet assay, chromosomal analysis, DNA repair functional assays\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with defined cellular phenotype (senescence, DNA repair) validated in both mouse and human fibroblasts; single lab\",\n      \"pmids\": [\"19779484\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1996,\n      \"finding\": \"RelA (p65) and the progesterone receptor (PR) physically interact in vitro, and this interaction mediates mutual transcriptional repression: RelA represses PR-activated transcription and PR represses TNFα-induced NF-κB/RelA activity.\",\n      \"method\": \"In vitro protein–protein interaction assay, transient transfection reporter assays, TNFα stimulation\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro pull-down plus functional reporter assays; single lab, multiple cell types and reporter constructs\",\n      \"pmids\": [\"8626413\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1996,\n      \"finding\": \"RelA (p65) and androgen receptor (AR) mutually repress each other's transcriptional activity; a weak AR–RelA protein–protein interaction was detected. RelA-mediated repression involves the AR N-terminal region (residue 297 to DNA-binding domain). The repression is not mediated through IκBα upregulation or reciprocal reduction of protein levels, nor through significant mutual inhibition of DNA binding.\",\n      \"method\": \"Transient transfection reporter assays, EMSA, immunoblotting, in vitro protein–protein interaction\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — reporter assays plus EMSA plus weak pull-down; interaction is weak; single lab\",\n      \"pmids\": [\"8798655\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"RelA/p65 stabilizes IκBβ protein from 26S proteasome-mediated degradation, a process mediated largely through the RelA C-terminal domain. In RelA/p65−/− fibroblasts, IκBβ is profoundly reduced (more than IκBα). A proteolysis-resistant form of IκBβ but not IκBα causes severe growth defect and apoptosis in RelA/p65−/− fibroblasts.\",\n      \"method\": \"RelA/p65 KO fibroblasts, reconstitution with RelA C-terminal truncations, proteasome inhibitor studies, apoptosis assays\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO plus domain mutagenesis plus rescue experiments with clear mechanistic readout; single lab with multiple orthogonal approaches\",\n      \"pmids\": [\"15923614\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"RelA and C/EBPβ form a cooperative DNA-binding complex on a composite NF-κB/C/EBP element in the ICAM-1 promoter. Complex formation requires intact C/EBP and NF-κB binding sites, depends on nuclear translocation of RelA, was demonstrated with recombinant proteins, and is cell-type specific (present in A549/HeLa/EVC304 but not Jurkat/Raji cells). This complex synergistically activates ICAM-1 promoter in response to TNFα.\",\n      \"method\": \"EMSA with recombinant proteins, co-immunoprecipitation from nuclear extracts, reporter assays, TNFα stimulation\",\n      \"journal\": \"Cell growth & differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — EMSA with recombinant proteins plus co-IP from endogenous extracts plus functional reporter assays; single lab\",\n      \"pmids\": [\"9831247\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"RIP3 kinase-dead mutant expression induces caspase-dependent cleavage of RelA/p65 (at least partially by caspase-6), and a non-cleavable RelA D361E mutant rescues cells from apoptosis, establishing that caspase-mediated cleavage of RelA is required for RIP3-KD–induced apoptosis in leukemia cells.\",\n      \"method\": \"RIP3-KD overexpression, caspase inhibitor assays, non-cleavable RelA D361E mutant rescue, immunoblotting\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mutagenesis rescue experiment plus caspase inhibitor epistasis; single lab\",\n      \"pmids\": [\"25144719\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"FOXO3 binds NF-κB RelA in the cytosol, preventing FOXO3 degradation and preventing RelA nuclear translocation. The interaction site was mapped near the FOXO3 transactivation domain; deletion of the FOXO3 DNA-binding domain sequence restored RelA activation.\",\n      \"method\": \"Co-immunoprecipitation, subcellular fractionation, domain deletion constructs, NF-κB reporter assays in tumor-associated dendritic cells\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus domain mapping plus functional nuclear translocation assay; single lab\",\n      \"pmids\": [\"26561547\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Hepatic NF-κB/RelA inhibits PDE3B transcription through three DNA-binding sites in the PDE3B gene promoter in response to TNFα, thereby maintaining elevated intracellular cAMP; deletion of liver p65 in mice increases PDE3B expression and improves hepatic insulin sensitivity on a high-fat diet.\",\n      \"method\": \"Liver-specific p65 knockout mice (Alb-cre × floxed-p65), ChIP, promoter reporter assay, metabolic phenotyping\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional KO mouse model plus ChIP plus reporter assay; clear in vivo mechanistic readout\",\n      \"pmids\": [\"26038580\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Proline-rich tyrosine kinase 2 (Pyk2) promotes RelA/p65 phosphorylation at Ser536 (via IKK) and facilitates nuclear translocation of RelA in thrombin-stimulated endothelial cells; Pyk2 knockdown blocked RelA nuclear translocation even when IκBα degradation still occurred.\",\n      \"method\": \"siRNA knockdown of Pyk2, IKKα/β, phospho-specific immunoblotting, nuclear translocation assay, NF-κB reporter, VCAM-1/MCP-1 expression\",\n      \"journal\": \"American journal of respiratory cell and molecular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — siRNA knockdown with multiple readouts (phosphorylation, translocation, target gene expression); dissociation of IκBα degradation from nuclear translocation is mechanistically informative; single lab\",\n      \"pmids\": [\"22842493\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"In hypoxia, only the RelA NF-κB subunit and IκBα localize to mitochondria (specifically the mitoplast containing mtDNA); p50 is found in the ER. Hypoxia-induced mitochondrial RelA and IκBα accumulation requires ROS and STAT3 but not HIF1α or intracellular Ca2+ release. STAT3 inhibition blocks RelA mitochondrial localization.\",\n      \"method\": \"Mitochondrial fractionation, protease protection (mitoplast isolation), hypoxia treatment, STAT3 inhibitor, ROS scavenger, immunoblotting\",\n      \"journal\": \"Bioscience reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — subcellular fractionation with mitoplast isolation plus pharmacological dissection of upstream signals; single lab\",\n      \"pmids\": [\"31484794\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"ASPP2 enhances nuclear RelA/p65 activity by binding IκB, and nuclear RelA/p65 mediates transcriptional repression of ΔNp63 expression in keratinocytes, thereby suppressing squamous cell carcinoma development.\",\n      \"method\": \"Co-immunoprecipitation (ASPP2-IκB), reporter assays, genetic epistasis (ASPP2 haploinsufficiency + p63 heterozygosity mouse model), NF-κB activity assays\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis in mouse model plus co-IP plus reporter assays; single lab\",\n      \"pmids\": [\"24127607\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"CD28-induced NF-κB signals mediate FOXP3 transcription in human CD4+ T cells via nuclear translocation of RelA (not c-Rel). RelA dimers occupy novel κB-binding sites on the FOXP3 gene, correlating with histone acetylation and Pol II recruitment; RelA knockdown significantly reduces CD28-costimulated FOXP3 expression.\",\n      \"method\": \"ChIP, EMSA, siRNA knockdown, flow cytometry, reporter assays, primary T cell stimulation\",\n      \"journal\": \"European journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus EMSA plus siRNA knockdown in primary human T cells; single lab\",\n      \"pmids\": [\"21268019\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Heterozygous dominant-negative truncating RELA mutations (in the 3' segment) produce truncated RelA proteins lacking full transactivation domains; these exert a dominant-negative effect and lead to enhanced TLR7-driven type I/III IFN secretion and interferon-stimulated gene expression in patient pDCs and myeloid cells, establishing a type I interferonopathy mechanism.\",\n      \"method\": \"Patient cell functional studies, TLR7 stimulation assays, mRNA expression (TLR7, MYD88), cytokine secretion assays, dominant-negative RelA expression in RelA−/− MEFs\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — patient-derived cells plus MEF reconstitution with dominant-negative mutant; multiple functional readouts across multiple families\",\n      \"pmids\": [\"37273177\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Embryonic lethality of RelA-deficient mice is mediated by both apoptosis and necroptosis: deletion of Rip3 or Mlkl partially prevents it, while combined ablation of Fadd and Rip3/Mlkl or blocking RIP1 kinase activity fully rescues embryonic lethality, placing RelA upstream of both cell death pathways.\",\n      \"method\": \"Genetic epistasis using RelA/Rip3, RelA/Mlkl, RelA/Fadd/Rip3 triple-knockout mice; RIP1 kinase-dead knock-in (RIP1K45A)\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean genetic epistasis with multiple double/triple KO combinations establishing pathway hierarchy; rigorous in vivo model\",\n      \"pmids\": [\"29167229\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TNF-induced NFκB/RelA dynamics control necroptosis decisions via an incoherent feedforward loop: RelA-driven inducible expression of TNFAIP3/A20 interferes with the RIPK3-containing necrosome complex, protecting a fraction of cells from transient TNF exposure. Dysregulated NF-κB dynamics diminish TNF-induced necroptosis.\",\n      \"method\": \"Live-cell microscopy, mathematical modeling of death kinetics, A20 inducible expression, RIPK3 complex analysis\",\n      \"journal\": \"Molecular systems biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live-cell imaging plus model-aided circuit analysis plus A20 functional studies; single lab\",\n      \"pmids\": [\"33314666\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"High glucose induces formation of a RELA/p65–HDAC8 complex that binds the PRKN (Parkin) promoter and represses PRKN expression, impairing mitophagy; sodium butyrate (NaB) blocks RELA nuclear translocation and directly inhibits nuclear HDAC8, restoring PRKN expression and mitophagy.\",\n      \"method\": \"ChIP assay (RELA-HDAC8 at PRKN promoter), co-immunoprecipitation (RELA-HDAC8 complex), HDAC8 overexpression, NaB treatment, mitophagy assays, diabetic mouse model\",\n      \"journal\": \"Autophagy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus co-IP plus HDAC8 overexpression rescue with functional mitophagy readout; single lab\",\n      \"pmids\": [\"38409852\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"ZBTB2 represses RelA/p65 gene transcription by inhibiting Sp1 binding to a GC-box (bp -31 to -21) in the RelA/p65 proximal promoter. Reduced RelA/p65 expression by ZBTB2 indirectly increases PDK4 expression (through relief of RelA-mediated PGC1α repression), reprogramming glucose metabolism toward glycolysis.\",\n      \"method\": \"Reporter assays with promoter deletions and mutations, EMSA, ChIP, siRNA knockdown, metabolic flux analysis\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — EMSA plus ChIP plus reporter mutagenesis plus metabolic readout; single lab\",\n      \"pmids\": [\"25609694\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Under hypoxia, NF-κB (RelA/p65) represses ZBTB7A transcription by binding NF-κB-binding elements in the ZBTB7A 5'-upstream regulatory region, downregulating the transcriptional repressor FBI-1, which in turn derepresses SLC16A3 (MCT4) expression to increase lactate efflux and colon cancer cell growth.\",\n      \"method\": \"ChIP, transient transfection/reporter assays, oligonucleotide pulldowns, hypoxia cell treatments, mRNA/protein expression analysis\",\n      \"journal\": \"Biochimica et biophysica acta. Gene regulatory mechanisms\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus reporter assays plus functional cell growth readout; single lab\",\n      \"pmids\": [\"31271899\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"RELA/RelA (p65) is the principal effector subunit of canonical NF-κB: it is maintained in the cytoplasm by IκB proteins, translocates to the nucleus upon IκB degradation, and its transcriptional activity is fine-tuned by a complex code of post-translational modifications—including site-specific phosphorylation (S276 by MSK1/PKA, S536 by IKK) that promotes assembly with the coactivators CBP/p300 and subsequent acetylation (K221 enhancing DNA binding/impairing IκBα reassembly; K310 required for full transcriptional activity), arginine dimethylation (R30 by PRMT1, inhibiting DNA binding), deamidation (by CAD, switching target gene selectivity toward glycolytic enzymes), and dephosphorylation (by PP2A and PPM1A); RelA also directly regulates its own inhibitor IκBβ stability, engages coactivators TIP60 and CBP/p300 through its transactivation domain (structure resolved by NMR), interacts with diverse partners including C/EBPβ, FOXO3, COMMD1, and nuclear receptors; under stress, RelA undergoes nucleolar translocation (regulated by COMMD1-dependent ubiquitination) to induce apoptosis through NPM/BAX, and localizes to mitochondria in a ROS/STAT3-dependent manner; oncogenic C11orf95/ZFTA-RELA fusion proteins constitutively enter the nucleus to activate NF-κB and neoplastic transcriptional programs in ependymoma; and loss-of-function RELA mutations cause autoinflammatory disease via impaired NF-κB signaling and enhanced type I interferon production.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"RELA/RelA (p65) is the principal transcriptional effector of canonical NF-κB signaling, held inactive in the cytoplasm and released to drive inflammatory, metabolic, and cell-fate gene programs upon stimulus [#21, #25]. Its activity is governed by a dense post-translational code: IKK- or MSK1/PKA-dependent phosphorylation at Ser536 and Ser276 licenses assembly with the coactivators CBP/p300, which acetylate RelA at K221 (enhancing DNA binding and impairing IκBα reassembly) and K310 (required for full transcriptional activity) [#0, #1, #3]. Structurally, the RelA transactivation domain (TA2) folds upon binding the TAZ1 domain of CBP/p300 while its DNA-binding domain engages the KIX domain in a Ser276-phosphorylation-dependent manner, coordinating activation of large gene sets and the IκBα-mediated negative feedback loop [#3]. This activating code is opposed by dephosphorylation (PP2A, PPM1A) and by PRMT1-mediated arginine dimethylation at R30 in the DNA-binding loop, which blocks DNA binding [#2, #5, #6], while TIP60 sustains acetyl-K310 levels and MIIP shields RelA from HDAC6 deacetylation [#7, #15]. Beyond canonical inflammation, deamidation by CAD reprograms RelA toward glycolytic gene expression, and RelA represses or activates target promoters governing autophagy (BECN1), metabolism (PDE3B, PRKN, ZBTB7A), regulatory T cell identity (FOXP3), and senescence-associated programs [#13, #16, #24, #28, #32, #34, #12]. RelA also acts non-transcriptionally: stress drives COMMD1-dependent ubiquitination and nucleolar translocation that triggers NPM/BAX-dependent apoptosis, and it sits upstream of both apoptotic and necroptotic cell-death pathways via A20/RIPK3 control [#8, #9, #30, #31]. Oncogenic C11orf95/ZFTA-RELA fusions enter the nucleus constitutively to activate NF-κB and neoplastic transcriptional programs in ependymoma, while dominant-negative truncating RELA mutations cause an autoinflammatory type I interferonopathy through impaired NF-κB and enhanced TLR7-driven interferon production [#10, #11, #29].\",\n  \"teleology\": [\n    {\n      \"year\": 1996,\n      \"claim\": \"Established that RelA engages in mutually repressive crosstalk with nuclear hormone receptors, defining an early mechanism for integrating inflammatory and endocrine signaling.\",\n      \"evidence\": \"In vitro protein interaction and reporter assays with progesterone and androgen receptors\",\n      \"pmids\": [\"8626413\", \"8798655\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Interaction with AR is weak\", \"Structural basis of mutual repression undefined\", \"Not tied to specific endogenous target genes\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Showed RelA cooperates combinatorially with other transcription factors on composite promoter elements, explaining cell-type-specific target gene selection.\",\n      \"evidence\": \"EMSA with recombinant proteins and reporter assays on the ICAM-1 promoter NF-κB/C/EBP element\",\n      \"pmids\": [\"9831247\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Basis of cell-type specificity not resolved\", \"No structure of the cooperative complex\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Resolved that site-specific acetylation by p300/CBP encodes distinct functional outputs, transforming RelA from a binary switch into a tunable transcription factor.\",\n      \"evidence\": \"In vitro acetylation, K-to-R mutagenesis, and dominant-negative p300 in cells\",\n      \"pmids\": [\"12456660\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Deacetylase counterparts not identified here\", \"In vivo stoichiometry of modifications unknown\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Linked upstream phosphorylation to downstream acetylation, establishing an ordered modification cascade controlling RelA activation.\",\n      \"evidence\": \"Phospho-specific antibodies, catalytically inactive IKK/PKA mutants, RelA-/- MEF reconstitution, ChIP\",\n      \"pmids\": [\"16135789\", \"15923614\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Quantitative kinetics of the cascade undefined\", \"Stoichiometric coupling in vivo not measured\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Identified phosphatases as direct negative regulators, showing RelA phosphorylation is reversible and actively opposed.\",\n      \"evidence\": \"Co-IP with domain mapping and in vitro dephosphorylation with purified PP2A; later in vitro PPM1A phosphatase assays\",\n      \"pmids\": [\"11591705\", \"23812431\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Site specificity of PP2A on RelA not fully resolved\", \"Physiological triggers of dephosphorylation undefined\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Demonstrated RelA's transcriptional reach beyond inflammation into autophagy and senescence, and its requirement for genomic stability.\",\n      \"evidence\": \"ChIP/EMSA at the BECN1 promoter and RelA-/- fibroblast senescence and DNA-repair assays\",\n      \"pmids\": [\"19289499\", \"19779484\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism linking RelA loss to DNA repair defects unresolved\", \"Direct repair targets not identified\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Revealed a non-canonical stress pathway in which COMMD1-dependent ubiquitination drives RelA into the nucleolus, decoupling RelA localization from transcription.\",\n      \"evidence\": \"Co-IP, gain/loss-of-function, NoLS mutagenesis, and fluorescence microscopy; followed by NoLS-RelA fusion epistasis with NPM knockdown\",\n      \"pmids\": [\"20048074\", \"21660047\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of the full ubiquitin ligase complex incomplete\", \"Physiological stress signals targeting RelA to nucleolus undefined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Provided the structural basis for RelA-coactivator engagement, explaining how phosphorylation gates coactivator recruitment genome-wide.\",\n      \"evidence\": \"NMR structure of RelA-TA2:TAZ1, ITC, point mutants, and genome-wide expression/ChIP analysis\",\n      \"pmids\": [\"24019758\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full ternary architecture with DNA not resolved\", \"Dynamics of KIX vs TAZ1 occupancy in vivo unclear\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Identified an oncogenic gain-of-function in which a fusion protein constitutively activates the canonical RelA program to drive ependymoma.\",\n      \"evidence\": \"C11orf95-RELA fusion expression, neural stem cell transformation, and mouse tumor models\",\n      \"pmids\": [\"24553141\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Contribution of the C11orf95 moiety to genomic targeting not yet defined here\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Added arginine methylation as a repressive mark directly inhibiting RelA DNA binding, broadening the modification code beyond phospho/acetyl.\",\n      \"evidence\": \"Co-IP, in vitro PRMT1 methylation, MD simulation, mutagenesis, and ChIP\",\n      \"pmids\": [\"27051065\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Demethylase counterpart not identified\", \"Crosstalk with acetylation at neighboring residues unexplored\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Showed deamidation reprograms RelA target selectivity toward glycolysis, connecting NF-κB modification to cancer metabolism.\",\n      \"evidence\": \"In vitro CAD deamidation, mass spectrometry, RELA mutants, and glycolytic gene profiling across cancer lines\",\n      \"pmids\": [\"32325032\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Reversal of deamidation not addressed\", \"Structural impact on DNA-binding specificity undefined\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Defined how RelA fusion proteins seize non-canonical genomic sites and coactivators, and how RelA dynamics dictate cell-death decisions.\",\n      \"evidence\": \"Multi-omics of ZFTA-RELA with coactivator pharmacology and mouse models; live-cell imaging and modeling of A20/RIPK3 feedforward circuit\",\n      \"pmids\": [\"33741710\", \"33314666\", \"33459422\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Determinants of PLAGL-motif targeting by the fusion unresolved\", \"Single-cell heterogeneity in death decisions incompletely mapped\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Established that loss-of-function dominant-negative RELA mutations cause autoinflammatory disease through impaired NF-κB and excess type I interferon.\",\n      \"evidence\": \"Patient cell functional studies, TLR7 stimulation, and dominant-negative RelA expression in RelA-/- MEFs across families\",\n      \"pmids\": [\"37273177\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanistic link between NF-κB loss and IFN gain not fully dissected\", \"Genotype-phenotype correlation across mutation positions incomplete\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How the combinatorial post-translational code (phospho/acetyl/methyl/deamidation/PARylation), coactivator choice, and subcellular trafficking are integrated to select among RelA's divergent inflammatory, metabolic, autophagic, and cell-death gene programs in a given cell remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking modification state to genome-wide target selection\", \"Quantitative crosstalk between competing modifications undefined\", \"Cell-type determinants of canonical vs non-canonical RelA fate unclear\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [3, 10, 16, 24, 28, 34]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 6, 21, 28]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [11]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [21, 25, 28]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [23, 26]},\n      {\"term_id\": \"GO:0005730\", \"supporting_discovery_ids\": [8, 9]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [26]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3, 25]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [4, 28, 29]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 3, 16, 24]},\n      {\"term_id\": \"R-HSA-5357801\", \"supporting_discovery_ids\": [9, 30, 31]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [10, 11, 29]},\n      {\"term_id\": \"R-HSA-9612973\", \"supporting_discovery_ids\": [16, 32]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [13, 24, 33, 34]}\n    ],\n    \"complexes\": [\"NF-κB (canonical RelA/p50)\"],\n    \"partners\": [\"CREBBP/EP300\", \"PRMT1\", \"PPP2R1A\", \"PPM1A\", \"COMMD1\", \"CEBPB\", \"FOXO3\", \"KAT5\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}