| 2002 |
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. |
In vitro acetylation assay, lysine-to-arginine mutagenesis, dominant-negative p300 co-expression, co-immunoprecipitation |
The EMBO journal |
High |
12456660
|
| 2005 |
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. |
Anti-acetyl-K310 RelA antibody, in vitro p300 acetylation assay, catalytically inactive kinase mutants, RelA-deficient MEF reconstitution, chromatin immunoprecipitation (E-selectin promoter) |
Molecular and cellular biology |
High |
16135789
|
| 2001 |
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. |
Co-immunoprecipitation, in vitro dephosphorylation assay with purified PP2A, okadaic acid inhibitor studies |
The Journal of biological chemistry |
High |
11591705
|
| 2013 |
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. |
NMR structure determination, isothermal calorimetry, RelA point mutants, genome-wide gene expression analysis, chromatin immunoprecipitation, mathematical modeling |
PLoS biology |
High |
24019758
|
| 2009 |
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. |
Site-directed mutagenesis (S276A), siRNA knockdown of MSK1, ROS inhibition, reconstitution of RelA−/− MEFs, NF-κB reporter assays |
Journal of virology |
High |
19706715
|
| 2013 |
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. |
In vitro phosphatase assay, immunoblotting with phospho-specific antibodies, siRNA knockdown, invasion assays, mouse metastasis model |
Oncogene |
High |
23812431
|
| 2016 |
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. |
Co-immunoprecipitation, in vitro methylation assay, molecular dynamics simulation, mutagenesis, chromatin immunoprecipitation |
Proceedings of the National Academy of Sciences of the United States of America |
High |
27051065
|
| 2012 |
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. |
Co-immunoprecipitation, chromatin immunoprecipitation, reporter assays, western blotting |
The Journal of biological chemistry |
Medium |
22249179
|
| 2010 |
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. |
Co-immunoprecipitation, siRNA knockdown, overexpression, fluorescence microscopy, domain mutagenesis |
Cancer research |
Medium |
20048074
|
| 2011 |
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. |
Viral NoLS-RelA fusion construct, siRNA knockdown of NPM, subcellular fractionation, live-cell imaging, TUNEL assay, BAX mitochondrial accumulation assay |
Cell death and differentiation |
High |
21660047
|
| 2014 |
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. |
Fusion protein expression, nuclear translocation assay, neural stem cell transformation, mouse tumor model, gene expression analysis |
Nature |
High |
24553141
|
| 2021 |
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. |
CUT&RUN, ChIP-seq, ATAC-seq, RNA-seq, pharmacological inhibition of BRD4/EP300/CBP, autochthonous mouse tumor model via in utero electroporation |
Cancer discovery |
High |
33741710
|
| 2021 |
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. |
RNA-sequencing, genetic KO (NFKBIA), pharmacological inhibition (IKK, proteasome, GSK3β), phospho-specific immunoblotting, in vitro and in vivo senescence models |
The EMBO journal |
High |
33459422
|
| 2020 |
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. |
In vitro deamidation assay, mass spectrometry, RELA mutant expression, glycolytic enzyme expression profiling, cancer cell line survey, glycolytic enzyme inhibition |
Cell metabolism |
High |
32325032
|
| 2012 |
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. |
Co-immunoprecipitation, signal pathway inhibitors (ERK inhibitor), reporter assays, cytokine mRNA quantification |
Human immunology |
Medium |
22391342
|
| 2017 |
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. |
Co-immunoprecipitation, phospho-specific antibodies, siRNA knockdown, kinase assay, HDAC6 deacetylation assay, metastasis assays |
Nature communications |
High |
29038521
|
| 2009 |
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. |
EMSA, chromatin immunoprecipitation, luciferase reporter, siRNA knockdown, autophagy assays |
Molecular and cellular biology |
Medium |
19289499
|
| 2009 |
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. |
RelA/p65 knockout fibroblasts, senescence assays, comet assay, chromosomal analysis, DNA repair functional assays |
EMBO reports |
Medium |
19779484
|
| 1996 |
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. |
In vitro protein–protein interaction assay, transient transfection reporter assays, TNFα stimulation |
The Journal of biological chemistry |
Medium |
8626413
|
| 1996 |
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. |
Transient transfection reporter assays, EMSA, immunoblotting, in vitro protein–protein interaction |
The Journal of biological chemistry |
Medium |
8798655
|
| 2005 |
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. |
RelA/p65 KO fibroblasts, reconstitution with RelA C-terminal truncations, proteasome inhibitor studies, apoptosis assays |
Molecular and cellular biology |
High |
15923614
|
| 1998 |
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. |
EMSA with recombinant proteins, co-immunoprecipitation from nuclear extracts, reporter assays, TNFα stimulation |
Cell growth & differentiation |
Medium |
9831247
|
| 2014 |
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. |
RIP3-KD overexpression, caspase inhibitor assays, non-cleavable RelA D361E mutant rescue, immunoblotting |
Cell death & disease |
Medium |
25144719
|
| 2015 |
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. |
Co-immunoprecipitation, subcellular fractionation, domain deletion constructs, NF-κB reporter assays in tumor-associated dendritic cells |
Journal of immunology |
Medium |
26561547
|
| 2015 |
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. |
Liver-specific p65 knockout mice (Alb-cre × floxed-p65), ChIP, promoter reporter assay, metabolic phenotyping |
Diabetes |
High |
26038580
|
| 2012 |
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. |
siRNA knockdown of Pyk2, IKKα/β, phospho-specific immunoblotting, nuclear translocation assay, NF-κB reporter, VCAM-1/MCP-1 expression |
American journal of respiratory cell and molecular biology |
Medium |
22842493
|
| 2012 |
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. |
Mitochondrial fractionation, protease protection (mitoplast isolation), hypoxia treatment, STAT3 inhibitor, ROS scavenger, immunoblotting |
Bioscience reports |
Medium |
31484794
|
| 2013 |
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. |
Co-immunoprecipitation (ASPP2-IκB), reporter assays, genetic epistasis (ASPP2 haploinsufficiency + p63 heterozygosity mouse model), NF-κB activity assays |
Proceedings of the National Academy of Sciences of the United States of America |
Medium |
24127607
|
| 2011 |
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. |
ChIP, EMSA, siRNA knockdown, flow cytometry, reporter assays, primary T cell stimulation |
European journal of immunology |
Medium |
21268019
|
| 2023 |
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. |
Patient cell functional studies, TLR7 stimulation assays, mRNA expression (TLR7, MYD88), cytokine secretion assays, dominant-negative RelA expression in RelA−/− MEFs |
The Journal of experimental medicine |
High |
37273177
|
| 2017 |
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. |
Genetic epistasis using RelA/Rip3, RelA/Mlkl, RelA/Fadd/Rip3 triple-knockout mice; RIP1 kinase-dead knock-in (RIP1K45A) |
Journal of immunology |
High |
29167229
|
| 2020 |
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. |
Live-cell microscopy, mathematical modeling of death kinetics, A20 inducible expression, RIPK3 complex analysis |
Molecular systems biology |
Medium |
33314666
|
| 2024 |
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. |
ChIP assay (RELA-HDAC8 at PRKN promoter), co-immunoprecipitation (RELA-HDAC8 complex), HDAC8 overexpression, NaB treatment, mitophagy assays, diabetic mouse model |
Autophagy |
Medium |
38409852
|
| 2015 |
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. |
Reporter assays with promoter deletions and mutations, EMSA, ChIP, siRNA knockdown, metabolic flux analysis |
Nucleic acids research |
Medium |
25609694
|
| 2019 |
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. |
ChIP, transient transfection/reporter assays, oligonucleotide pulldowns, hypoxia cell treatments, mRNA/protein expression analysis |
Biochimica et biophysica acta. Gene regulatory mechanisms |
Medium |
31271899
|