| 2001 |
BRG1 (SMARCA4) fractionates into two distinct complexes that differ in activity and subunit composition; both BRG1-containing complexes and the hBrm complex can remodel nucleosomal arrays, increase restriction enzyme accessibility, and hydrolyze ATP in a DNA-dependent manner. One BRG1 complex and the hBrm complex contain mSin3A components, and BRG1, hBrm, and BAF155 directly interact with mSin3A in vitro, linking hSWI/SNF to gene repression machinery. |
Epitope-tagged cell lines, biochemical fractionation, nucleosome remodeling assays, ATPase assays, restriction enzyme accessibility assays, in vitro pulldown |
Genes & development |
High |
11238380
|
| 2001 |
LKB1 (STK11) physically associates with BRG1, requiring the N-terminus of LKB1 and the helicase domain of BRG1. LKB1 stimulates the ATPase activity of BRG1. Expression of a kinase-dead LKB1 mutant blocks BRG1-induced growth arrest (flat-cell formation) in SW13 cells, demonstrating LKB1 kinase activity is required for BRG1-dependent growth arrest. |
Co-immunoprecipitation, domain-mapping pulldown, ATPase activity assay, cell-based growth arrest assay with kinase-dead mutant |
The Journal of biological chemistry |
High |
11445556
|
| 2004 |
BRG1 reintroduction into BRG1-mutant breast tumor cells induces growth arrest accompanied by upregulation of CDK inhibitors p21 and p15; p21 protein is recruited to a complex with CDK2 to inhibit its activity. BRG1 associates with the p21 promoter in a p53-independent manner, suggesting direct transcriptional activation of p21. |
BRG1 re-expression in BRG1-null cells, microarray/RT-PCR, protein co-immunoprecipitation (p21-CDK2 complex), chromatin immunoprecipitation (ChIP) |
Molecular and cellular biology |
Medium |
14673169
|
| 2004 |
STAT3 recruits BRG1 to the p21waf1 promoter upon cytokine stimulation; BRG1 loading results in increased chromatin accessibility at the proximal p21waf1 promoter and association of RNA Polymerase II, establishing BRG1 as a downstream effector of STAT3-mediated chromatin remodeling and transcription initiation. |
Co-immunoprecipitation, pulldown, chromatin immunoprecipitation (ChIP), Southern blot restriction enzyme accessibility assay |
Oncogene |
Medium |
15286705
|
| 2006 |
BRG1 disrupts a positioned nucleosome at the TG-repeat sequence in the CSF1 promoter and induces Z-DNA formation. Both BRG1 remodeling activity and Z-DNA formation are required cooperatively for effective chromatin remodeling of the CSF1 promoter; active transcription expands but is not required to initiate Z-DNA formation. |
Nucleosome positioning assays, chromatin remodeling assays, Z-DNA antibody immunoprecipitation, restriction enzyme accessibility, transcription inhibition experiments |
Molecular and cellular biology |
Medium |
16537901
|
| 2013 |
BRG1 promotes COUP-TFII expression in venous endothelial cells during murine embryogenesis by binding conserved regulatory elements within the COUP-TFII promoter and remodeling chromatin to increase promoter accessibility, thereby governing venous specification. Conditional endothelial deletion of Brg1 results in downregulated COUP-TFII and aberrant arterial marker expression on veins. |
Conditional knockout mouse model, ChIP, chromatin accessibility assay, immunofluorescence |
Development (Cambridge, England) |
Medium |
23406903
|
| 2015 |
BRG1 co-localizes with H3K27ac at distal enhancers and is required for robust H3K27 acetylation at enhancers activated during mesoderm induction. BRG1 is also required to maintain Polycomb-mediated H3K27me3 repression at non-mesodermal developmental regulators, demonstrating a dual role in activating lineage-specific enhancers and maintaining repression of alternative lineage genes. |
ESC-based directed differentiation, Brg1 conditional knockout, ChIP-seq for H3K27ac and H3K27me3, gene expression analysis |
Development (Cambridge, England) |
Medium |
25813539
|
| 2015 |
Evf2 lncRNA is present in a ribonucleoprotein complex with BRG1 (SMARCA4) and BAF170 (SMARCC2) in the developing mouse forebrain. Evf2 RNA directly inhibits BRG1 ATPase and chromatin remodeling activities in vitro. BRG1 interacts with DLX1 and Evf2 through distinct binding sites. RNA-mediated inhibition of BRG1 ATPase/remodeling is promiscuous in vitro. Coffin-Siris syndrome mutations localize to the BRG1 RNA-binding and DLX1-binding domains. |
Mass spectrometry, co-immunoprecipitation, in vitro ATPase assay, in vitro remodeling assay, nuclear colocalization imaging |
Development (Cambridge, England) |
High |
26138476
|
| 2015 |
Brg1 controls chromatin remodeling and transcriptional activation at the Pax7 promoter in muscle satellite cells, and is required for viability and proliferation of primary myoblasts. Loss of Brg1 causes apoptosis; reintroduction of catalytically active Brg1 or Pax7 rescues the apoptotic phenotype. |
Conditional Brg1 deletion in primary satellite cells, ChIP, apoptosis assays, rescue with active Brg1 vs. Pax7 |
Journal of cellular physiology |
Medium |
26036967
|
| 2015 |
BRG1 is required for glucocorticoid receptor (GR)-mediated transcription. BRG1 pre-occupies GR binding sites (GBSs) prior to hormone exposure and is required for recruitment of pioneer factors FOXA1 and GATA3 to GBSs. GR interaction with FOXA1 and GATA3 binding sites was restricted to sites pre-bound by BRG1. |
BRG1 knockdown in human breast cancer cells, ChIP-seq for BRG1/GR/FOXA1/GATA3, transcriptional activation assays |
eLife |
Medium |
29792595
|
| 2015 |
Ku70 (XRCC6) associates with a BRG1 fragment encompassing the HSA and BRK domains. Ku70/86 and components of the TOP2β/PARP1 complex are required for NR-mediated SWI/SNF-dependent transcriptional activation from endogenous promoters. GR/BRG1-dependent TOP2β-mediated transient double-strand DNA breaks are required for efficient GR-stimulated transcription. |
BRG1 domain-fragment pulldown, ChIP, transcriptional activation assay, TOP2β inhibition experiments |
Molecular and cellular biology |
Medium |
26055322
|
| 2017 |
SMARCA4 cancer missense mutations target conserved ATPase surfaces and disrupt the mechanochemical cycle of chromatin remodeling. Heterozygous expression of dominant-negative SMARCA4 mutants alters the open chromatin landscape at thousands of sites, causing loss of DNA accessibility at active enhancers (H3K27ac loss, H3K4me1 retained) and inducing pro-oncogenic expression changes including increased MYC expression. |
ATPase mechanochemical analysis, ATAC-seq, ChIP-seq (H3K27ac, H3K4me1), Polycomb ChIP-seq, gene expression analysis in cells expressing dominant-negative mutants |
Nature structural & molecular biology |
High |
29323272
|
| 2017 |
BRG1 bromodomain (BRD) has moderate specificity for H3K14ac. Both BRG1 and hBRM BRDs have DNA-binding activity through a surface basic patch; the BRD and an adjacent AT-hook make multivalent contacts with DNA showing affinity for AT-rich elements. Histone-binding activity does not substantially contribute to nucleosome targeting in vitro, and neither BRD histone nor DNA binding contribute to global chromatin affinity of BRG1 in mouse ESCs. |
Biochemical binding assays, NMR, SELEX, mutagenesis of basic patch, in vitro nucleosome binding assays, mouse ESC chromatin binding |
Nature communications |
High |
28706277
|
| 2017 |
BRG1 knockdown globally alters long-range genomic interactions and reduces TAD boundary strength, suggesting BRG1 affects nucleosome occupancy around CTCF sites at TAD boundaries and may regulate CTCF and topoisomerase complex recruitment. |
BRG1 knockdown, Hi-C/genome organization analysis, CTCF ChIP |
Nucleus (Austin, Tex.) |
Low |
28060558
|
| 2018 |
SCFFBW7 ubiquitin ligase mediates BRG1 protein degradation. CK1δ phosphorylates BRG1 at Ser31/Ser35 residues to facilitate BRG1 binding to FBW7, leading to ubiquitination-mediated degradation. Stabilization of BRG1 in gastric cancer cells suppresses E-cadherin expression and promotes metastasis. |
Co-immunoprecipitation, site-directed mutagenesis (Ser31/Ser35), ubiquitination assay, kinase assay, E-cadherin expression analysis |
Nature communications |
High |
30177679
|
| 2018 |
HDAC3 inhibition by entinostat decreases SMARCA4 chromatin remodeling activity, which in turn derepresses miR-27a, leading to destabilization of PAX3:FOXO1 mRNA and chemotherapy sensitization in alveolar rhabdomyosarcoma cells. |
HDAC3 inhibition, SMARCA4 activity assays, miR-27a expression analysis, mRNA stability assays, in vivo mouse models |
Science signaling |
Medium |
30459282
|
| 2019 |
Xist lncRNA directly interacts with BRG1, and in vitro RNA binding inhibits nucleosome-remodeling and ATPase activities of BRG1. In cells, Xist expels BRG1 from the inactive X chromosome; Xist deletion allows selective return of BRG1 in cis, which correlates with cohesin binding and restoration of TADs and formation of de novo 'superloops'. |
In vitro ATPase assay, in vitro nucleosome remodeling assay, RNA-protein interaction assay, ChIP-seq, ATAC-seq, Hi-C, Xist deletion cell system |
Nature structural & molecular biology |
High |
30664740
|
| 2019 |
PTEN loss stabilizes BRG1 protein through inhibition of the AKT/GSK3β/FBXW7 axis. Increased BRG1 in PTEN-deficient prostate cancer cells drives chromatin remodeling into a protumorigenic transcriptome, creating a synthetic lethal dependency on BRG1. |
Genetically engineered mouse models, organoid assays, protein stability analysis, co-immunoprecipitation, ChIP, BRG1 inhibitor treatment |
The Journal of clinical investigation |
Medium |
30496141
|
| 2019 |
BRG1 interacts with KDM3A histone demethylase on the MUC1 promoter in a STAT1- and RelA-dependent manner, demethylating H3K9 to activate MUC1 transcription in breast cancer cells. |
ChIP, co-immunoprecipitation, siRNA knockdown of BRG1/KDM3A, histone modification analysis |
Biochemical and biophysical research communications |
Medium |
30824191
|
| 2019 |
BRG1 interacts with RORγ and is recruited to the Elovl3 promoter; BRG1 also interacts with histone acetyltransferase p300 to activate Elovl3 transcription in response to androgen and TGF-β in prostate cancer cells. |
Co-immunoprecipitation, ChIP, siRNA knockdown, gene expression analysis |
Biochimica et biophysica acta. Gene regulatory mechanisms |
Low |
31154107
|
| 2020 |
BRG1 (SMARCA4)-containing SWI/SNF complexes physically interact with RPA complexes, as shown by quantitative mass spectrometry and co-immunoprecipitation. BRG1 loss in lung cancer cells leads to increased origin firing mediated by CDC6 and activation of replication stress responses, creating dependency on ATR kinase. |
Co-immunoprecipitation, quantitative mass spectrometry, single-molecule replication fork dynamics (DNA fiber assay), pharmacological ATR inhibition |
Cancer research |
Medium |
32690724
|
| 2020 |
Acute depletion of BRG1 (via auxin-inducible degron in knock-in mice) leads to decreased nascent RNA production and RNA Polymerase II binding at many genes, correlated with loss of BRG1 occupancy, diminished chromatin accessibility at DHSs, decreased p300 binding, and narrower nucleosome spacing at TF motifs, enhancers, and TSSs. Acute BRG1 depletion also severely compromises TSA-induced histone acetylation. |
Auxin-inducible degron knock-in mouse, SLAM-seq (nascent RNA), ChIP-seq (RNAPII, BRG1, p300), ATAC-seq, nucleosome mapping |
Nature communications |
High |
38811575
|
| 2020 |
CK2 (casein kinase 2) interacts with Brg1 and phosphorylates it in a mitotic-specific manner (hyperphosphorylation during mitosis). CK2-mediated phosphorylation is associated with partitioning of Brg1 to soluble chromatin during mitosis, and this phosphorylation pattern is conserved across multiple cell types and organisms. |
Co-immunoprecipitation, phosphorylation/kinase assays, subcellular fractionation, cell-cycle synchronization, immunofluorescence in embryonic somites and primary myoblasts |
International journal of molecular sciences |
Medium |
32019271
|
| 2021 |
PRMT1-mediated H4R3me2a histone modification directly recruits SMARCA4 to chromatin. SMARCA4 and PRMT1 cooperatively promote CRC progression by activating EGFR and TNS4 transcription. The SMARCA4 R1157W mutation enhances recruitment to H4R3me2a and increases SWI/SNF ATPase activity. |
Co-immunoprecipitation, ChIP-seq, ChIP, cell viability/migration assays, in vivo mouse CRC model, ATPase activity assay for R1157W mutant |
Genome medicine |
Medium |
33853662
|
| 2021 |
Smarca4 loss impairs the function of all three classes of SWI/SNF complexes (BAF, PBAF, GBAF), resulting in decreased chromatin accessibility at lung lineage transcription factor motifs, ultimately driving dedifferentiated tumor states and accelerated metastasis in a cell-type-dependent manner. |
Conditional Smarca4 knockout mouse lung cancer model, ATAC-seq, scRNA-seq, chromatin accessibility analysis, SWI/SNF complex immunoprecipitation |
Cancer discovery |
High |
34561242
|
| 2021 |
KDM2B interacts with Brg1 (the SWI/SNF ATPase subunit) to facilitate chromatin accessibility at the Il6 promoter specifically, and this interaction is required for IL-6 induction in macrophages/dendritic cells without altering histone demethylation at the locus. |
Co-immunoprecipitation, ChIP, KDM2B-conditional knockout mice, ATAC/chromatin accessibility assay |
Cellular & molecular immunology |
Medium |
31197256
|
| 2021 |
Brg1 is required for NKp46+ ILC3 differentiation by promoting T-bet expression. Brg1 binds to both the Tbx21 and Csf2 gene loci in ILC3s, promoting active histone modifications at Tbx21 (activating T-bet) and repressive modifications at Csf2 (suppressing GM-CSF), through a cell-intrinsic mechanism that restrains intestinal inflammation. |
ILC3-specific Brg1 conditional KO, mixed bone marrow chimera, flow cytometry, ChIP for histone modifications at Tbx21 and Csf2 loci |
Mucosal immunology |
Medium |
32612160
|
| 2021 |
Neuronal activity induces BRG1 phosphorylation at a serine residue sensitive to CaMKII inhibition. Phosphorylation alters BRG1 interaction with the NuRD repressor complex and cohesin, modulating enhancer-promoter looping, RNA Pol II recruitment, and enhancer RNA expression. Non-phosphorylatable BRG1 knockin mice fail to efficiently induce activity-dependent genes and show anxiety-like phenotypes. |
CaMKII inhibition, BRG1 phosphorylation mapping, co-immunoprecipitation (NuRD, cohesin), ChIP-seq, enhancer RNA quantification, knockin mouse behavior phenotyping |
Cell reports |
Medium |
34260936
|
| 2021 |
SMARCA4 loss renders lung cancer cells and primary SCCOHT cells highly sensitive to inhibition of KDM6A/UTX and KDM6B/JMJD3 histone demethylases. SMARCA4-mutant cells show impaired transactivation, aberrant H3K27me3 accumulation, and significantly reduced KDM6A/KDM6B levels compared to SMARCA4-intact cells. |
SMARCA4-mutant cell lines, KDM6 inhibitor (GSK-J4) treatment, in vivo orthotopic tumor models, H3K27me3 ChIP, gene expression analysis |
Nature communications |
Medium |
34262032
|
| 2021 |
OTUD6A deubiquitinase stabilizes BRG1 by erasing K27-linked polyubiquitination, thereby preventing its degradation in prostate cancer cells. OTUD6A catalytic activity (not dead-mutant) is required for this stabilization and for prostate cancer cell progression. |
Mass spectrometry substrate screening, co-immunoprecipitation, ubiquitination assay, catalytic dead mutant, in vivo PDX and GEM models |
Communications biology |
Medium |
35233061
|
| 2022 |
SMARCA4/2 loss represses GLUT1 expression, reduces glucose uptake and glycolysis, and increases dependency on oxidative phosphorylation fueled by elevated glutamine import via SLC38A2. SMARCA4/2-deficient cells are sensitive to OXPHOS inhibitors and glutamine metabolism inhibitors; alanine supplementation competes with glutamine uptake via SLC38A2 and selectively kills SMARCA4/2-deficient cells. |
SMARCA4/2 double-knockout cells, metabolic flux assays, glucose uptake assays, SLC38A2 knockdown, in vitro and patient-derived xenograft treatment experiments |
Nature communications |
Medium |
37210563
|
| 2022 |
Hemogen recruits SWI/SNF complex ATPase BRG1 as a coactivator to regulate nucleosome accessibility and H3K27ac enrichment at erythroid gene promoters and enhancers. BRG1 is largely dependent on hemogen to regulate chromatin accessibility at erythroid gene promoters/enhancers in mouse fetal liver, as shown by hemogen-knockout animals. |
Co-immunoprecipitation, ChIP-seq in WT and hemogen-KO mice, ATAC-seq, hemogen-knockout/knockin mouse models |
Blood |
Medium |
35297980
|
| 2022 |
Brg1 loss leads to immediate increased tolerance to aneuploidy in chromosomally stable cells, and fitness recovery over time correlates with chromosome gain, demonstrating BRG1 normally suppresses aneuploidy tolerance. |
BRG1 deletion in chromosomally stable cell line, karyotype analysis, fitness/proliferation assays over time, proteomics |
Nature communications |
Medium |
35365638
|
| 2022 |
SMARCA4 colocalizes with SOX10 at gene regulatory elements in diffuse midline glioma (DMG) cells; SMARCA4 chromatin binding is reduced upon depletion of SOX10 or H3.3K27M mutation. SMARCA4 controls expression of genes involved in cell growth and the extracellular matrix in DMG. |
ChIP-seq for SMARCA4 and SOX10, SMARCA4 KO/knockdown, H3.3K27M depletion, gene expression analysis, patient-derived xenograft models |
Cancer discovery |
Medium |
36305747
|
| 2023 |
Brg1 interacts with lysine demethylase Kdm7aa in cardiac endothelial cells; this complex fine-tunes H3K4me3 at the promoter regions of Notch family genes, modulating Notch transcription during zebrafish heart regeneration. Dominant-negative Brg1 expression in endothelium causes abnormal Notch activation and inhibits myocardial regeneration. |
Co-immunoprecipitation, ChIP-seq (H3K4me3), RNA-seq, endothelium-specific dominant-negative Brg1 overexpression in zebrafish |
NPJ Regenerative medicine |
Medium |
37029137
|
| 2023 |
Brg1 directly binds to the CXCL14 promoter and activates its transcription in hepatocytes, driving neutrophil trafficking during alcoholic liver disease. Pharmaceutical inhibition of Brg1 with PFI-3 reduces CXCL14 expression and alleviates ALD pathogenesis. |
Hepatocyte-specific Brg1 manipulation, RNA-seq, ChIP at CXCL14 promoter, flow cytometry, PFI-3 small molecule inhibitor treatment, in vivo ALD mouse models |
EMBO molecular medicine |
Medium |
36722664
|
| 2023 |
The SMARCA4 R1157W mutation facilitates recruitment to PRMT1-mediated H4R3me2a chromatin and enhances the ATPase activity of the SWI/SNF complex, reinforcing transcriptional activation of EGFR and TNS4 to promote CRC cell proliferation. |
SMARCA4 R1157W mutant expression, ATPase activity assay, ChIP, organoid proliferation assays, xenograft models, PRMT1/SMARCA4 inhibitor combination |
NPJ precision oncology |
Medium |
36922568
|
| 2023 |
Brg1 controls stemness and metastasis of pancreatic ductal adenocarcinoma through regulation of the hypoxia pathway. Brg1 is required for HIF-1α to bind its target genes, augmenting the hypoxia transcriptional program that maintains cancer stem-like properties and enables liver metastasis. |
Dual recombinase conditional Brg1 deletion in established PDAC, splenic injection/peritoneal dissemination metastasis models, ChIP for HIF-1α binding, gene expression analysis |
Oncogene |
Medium |
37198398
|
| 2024 |
SMARCA4 loss in ovarian cancer models results in up-regulation of long-terminal RNA repeats, increased expression of interferon-stimulated genes, and up-regulation of antigen presentation machinery, dependent on STING, MAVS, and IRF3 signaling but independent of type I interferon receptor. Mouse tumors with SMARCA4 loss show increased cytotoxic T cell, NK cell, and myeloid infiltration. |
SMARCA4 knockout in ovarian cancer cells, RNA-seq, STING/MAVS/IRF3 knockdown epistasis, immune cell flow cytometry in mouse tumor models, BRG1 inhibitor treatment of SMARCA4-proficient cells |
Science advances |
Medium |
39630912
|
| 2024 |
The BRG1 AT-hook of the esBAF complex preferentially binds RNA and associates with eRNA transcribed from intronic and intergenic regions. SWI/SNF is globally recruited in cis by eRNA to cell-type-specific enhancers; this facilitates recruitment of MLL3/4, p300/CBP, and Mediator to stage-specific enhancers and super-enhancers. |
RNA binding assays (AT-hook), eRNA co-immunoprecipitation, ChIP-seq for BRG1/MLL3/4/p300/Mediator at enhancers, cell lineage differentiation stages |
Molecular cell |
Medium |
38593804
|
| 2020 |
NMR spectroscopy and molecular modelling of the BRG1 AT-hook/bromodomain composite domain reveal the structural basis of DNA specificity. SELEX-seq identified preferred DNA sequences for this domain; cancer mutations in the DNA-binding pocket alter the mode of DNA association. |
NMR spectroscopy, SELEX-seq, molecular modelling, mutagenesis of cancer-associated residues |
Biochimica et biophysica acta. Gene regulatory mechanisms |
High |
32376391
|
| 2018 |
BRG1 binds to the Sox9 promoter in pancreatic acinar cells to regulate Sox9 expression and is critical for recruitment of upstream regulators PDX1 to the Sox9 promoter and enhancer. BRG1 loss blocks acinar-to-ductal metaplasia (ADM) and PanIN formation; Sox9 overexpression rescues the PanIN-attenuated phenotype of BRG1-deficient mice. |
Acinar-specific Brg1 conditional KO in Kras-mutant mice, ChIP at Sox9 promoter/enhancer, Sox9 overexpression rescue experiment, dual recombinase system for established PanIN deletion |
The Journal of clinical investigation |
High |
30010625
|
| 2017 |
BRG1/BRM repress c-Myc expression in adult cardiomyocytes; loss of both BRG1 and BRM leads to upregulated c-MYC and progressive ventricular dysfunction with conduction defects. BRG1/BRM and c-MYC have opposite effects on cardiac conduction gene expression; BRG1/BRM occupancy is diminished at target genes in human heart failure cases. |
Tamoxifen-inducible cardiomyocyte-specific Brg1/Brm double KO, echocardiography, electrocardiography, inducible c-MYC overexpression, ChIP in human heart failure specimens |
Journal of molecular and cellular cardiology |
Medium |
28232072
|
| 2018 |
SMARCAL1 and BRG1 co-localize on the promoters of ATM and ATR; downregulation of both results in transcriptional repression of ATM/ATR and override of the G2/M checkpoint. On DNA damage, phospho-ATM binds to the promoters of SMARCAL1, BRG1, ATM, and ATR, creating a feedback regulatory loop. |
ChIP (SMARCAL1, BRG1 at ATM/ATR promoters), siRNA knockdown, cell cycle checkpoint assays, phospho-ATM ChIP |
Biochimica et biophysica acta. Gene regulatory mechanisms |
Medium |
30317028
|