{"gene":"SMARCA5","run_date":"2026-06-10T07:46:35","timeline":{"discoveries":[{"year":1998,"finding":"SMARCA5/hSNF2H was cloned and identified as a human homologue of Drosophila ISWI, encoding a 1,052 amino-acid protein with a conserved ATPase domain characteristic of the SWI2/SNF2 family, mapped to chromosome 4q31.1→q31.2, suggesting a role in chromatin remodeling.","method":"cDNA cloning, sequence homology analysis, Northern blot, FISH mapping","journal":"Cytogenetics and cell genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct cloning and structural characterization with multiple methods in one study, but no functional reconstitution","pmids":["9730600"],"is_preprint":false},{"year":2004,"finding":"SMARCA5/hSNF2H physically interacts with the de novo DNA methyltransferase DNMT3B, as well as HDAC1, HDAC2, HP1 proteins, and Suv39h1; endogenous hSNF2H is associated with DNA methyltransferase activity, co-localizing with DNMT3B in heterochromatic regions.","method":"Co-immunoprecipitation, GST pull-down, immunofluorescence co-localization, ATPase activity assay","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP and GST pull-down in single lab, with functional activity assay","pmids":["15120635"],"is_preprint":false},{"year":2009,"finding":"Smarca5 (Snf2h) is localized predominantly to euchromatin, with lesser presence in heterochromatin and nucleoli; Smarca5 heterozygous mice show decreased histone H3 modifications and defects in heterochromatin foci, indicating Smarca5 is a key regulator of global chromatin structure.","method":"Confocal microscopy, immunostaining with histone modification markers, heterozygous mouse model","journal":"Frontiers in bioscience (Elite edition)","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct localization with functional consequence in mouse model, single lab","pmids":["19482671"],"is_preprint":false},{"year":2012,"finding":"SMARCA5/SNF2H is recruited to DNA double-strand breaks (DSBs) in a PARP1-dependent manner; SMARCA5 and RNF168 interact in a DNA damage- and PARP-dependent manner; RNF168 undergoes poly(ADP-ribosyl)ation after DNA damage, and PAR chains plus RNF168 are required for SMARCA5 binding; SMARCA5 promotes RNF168 accumulation at DSBs to facilitate ubiquitin conjugation and BRCA1 assembly; SMARCA5 depletion renders cells sensitive to IR and causes DSB repair defects.","method":"Co-immunoprecipitation, live-cell imaging (recruitment to laser-induced DSBs), siRNA knockdown, IR sensitivity assay, PAR chain functional assays","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP, live imaging, multiple functional readouts, mechanistic dissection with PAR dependency, single rigorous study with orthogonal methods","pmids":["23264744"],"is_preprint":false},{"year":2014,"finding":"SMARCA5/SNF2H and its binding partners ACF1 and WSTF are recruited to UV-C-induced DNA damage to facilitate CSB binding and promote transcription recovery after NER; SMARCA5 targeting to UV-C damage depends on transcription, histone modifications, and requires functional SWI2/SNF2-ATPase and SLIDE domains; after initial recruitment, SMARCA5 re-localizes away from the damage center requiring its HAND domain.","method":"Live-cell imaging, domain-deletion mutagenesis, UV-C local damage assays, CSB recruitment assay, transcription recovery assay","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — live imaging combined with domain mutagenesis and functional transcription recovery readout in a single rigorous study","pmids":["24990377"],"is_preprint":false},{"year":2014,"finding":"SMARCA5 facilitates CTCF binding to its target DNA sites and supports the CTCF enhancer-blocking function at the ICR; SMARCA5 associates with the Cohesin complex and is recruited together with CTCF and Cohesin members to the SPI1 gene -14.4 Enhancer in differentiating myeloid cells, blocking SPI1 (PU.1) expression.","method":"ChIP assays, co-immunoprecipitation, reporter/enhancer-blocking assays, AML primary cell analysis","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP and Co-IP in single lab with two orthogonal methods, functional enhancer-blocking assay","pmids":["24498324"],"is_preprint":false},{"year":2017,"finding":"Conditional deletion of Smarca5 at the onset of definitive hematopoiesis causes embryonic lethality due to anemia; hematopoietic stem and progenitor cells accumulate but fail to mature into erythroid and myeloid lineages; Smarca5 deficiency increases p53 levels and activates p53 targets, including at residues associated with DNA damage (S15Ph) and CBP/p300 (K376Ac); deletion in committed erythroid cells causes postnatal anemia; ex vivo deletion confirms requirement for erythroid cell proliferation.","method":"Conditional knockout mouse models (Vav1-iCre, Epor-iCre, 4-OHT-inducible), hematopoietic phenotyping, Western blot for p53 modifications, flow cytometry","journal":"Stem cells (Dayton, Ohio)","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean conditional KO with defined cellular phenotype, multiple Cre drivers, mechanistic dissection of p53 pathway","pmids":["28276606"],"is_preprint":false},{"year":2019,"finding":"SMARCA5 is required for thymocyte development: conditional knockout causes a developmental block at the DN3 stage of αβ thymocytes and pro-B stage of early B cells; loss leads to massive apoptosis of β-selected DN3 cells, premitotic arrest of DP cells, persistent expression of immature markers (CD44, CD25), and p53 pathway activation; p53 deficiency partially rescues thymus cellularity but not the developmental defects.","method":"Conditional knockout mouse model, flow cytometry, gene expression profiling, epistasis with p53 knockout","journal":"Journal of immunology","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean conditional KO with defined cellular phenotype, multiple developmental stage readouts, genetic epistasis with p53","pmids":["31068388"],"is_preprint":false},{"year":2020,"finding":"CRISPR/Cas9-mediated SMARCA5 knockout in AML cell lines inhibits cell cycle progression, induces karyorrhexis and nuclear budding, increases ploidy, and causes premature chromatid separation, indicating a role in mitotic division and chromatid cohesion.","method":"CRISPR/Cas9 knockout, cell cycle analysis, cytogenetic analysis, flow cytometry","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean CRISPR KO in multiple AML cell lines, multiple phenotypic readouts, single lab","pmids":["32197313"],"is_preprint":false},{"year":2021,"finding":"Smarca5 interacts with nucleolin to promote chromatin remodeling in zebrafish fetal hematopoietic stem and progenitor cells, thereby facilitating genomic binding of transcription factors to regulate expression of hematopoietic regulators such as bcl11ab; Smarca5 is responsible for maintenance of chromatin accessibility at promoters of hematopoiesis-related genes.","method":"ATAC-seq, RNA-seq, Co-immunoprecipitation (Smarca5-nucleolin interaction), functional assays in zebrafish","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP interaction validated with chromatin accessibility profiling and functional zebrafish model, single lab","pmids":["32756943"],"is_preprint":false},{"year":2021,"finding":"SMARCA5 depletion in mouse preimplantation embryos reduces developmental capability, compromises inner cell mass specification and differentiation (OCT4 not restricted to ICM, reduced NANOG and SOX17), and dysregulates 402 genes at the blastocyst stage; in bovine embryos, depletion does not affect blastocyst development but compromises quality and disrupts primitive endoderm formation (reduced GATA6).","method":"siRNA-mediated depletion in mouse and bovine embryos, immunostaining, RNA-seq","journal":"Biology of reproduction","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function with defined molecular phenotype in two species, RNA-seq, single lab","pmids":["33899080"],"is_preprint":false},{"year":2021,"finding":"The lncRNA lncMREF interacts with Smarca5 to promote chromatin accessibility when muscle satellite cells are activated and differentiate, facilitating genomic binding of p300/CBP/H3K27ac and upregulating myogenic regulators such as MyoD.","method":"Co-immunoprecipitation (lncMREF-Smarca5), ATAC-seq, ChIP-seq for H3K27ac/p300, loss-of-function experiments in mouse","journal":"Nucleic acids research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP interaction with chromatin accessibility functional readout, single lab","pmids":["36200826"],"is_preprint":false},{"year":2021,"finding":"In zebrafish, smarca5-deficient red blood cells form blood clots; smarca5 deletion decreases chromatin accessibility at the keap1a promoter and reduces keap1a expression, leading to elevated hmox1a (a downstream target of Keap1-Nrf2 signaling); overexpression of keap1a or knockdown of hmox1a partially rescues blood clot formation, placing smarca5 upstream of the Keap1-Nrf2 pathway in RBC homeostasis.","method":"Zebrafish mutant model, ATAC-seq, RNA-seq, drug treatment, rescue experiments (keap1a overexpression, hmox1a knockdown)","journal":"eLife","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic loss-of-function with defined phenotype, ATAC-seq, epistasis rescue experiments, multiple orthogonal methods in one study","pmids":["34698638"],"is_preprint":false},{"year":2022,"finding":"NUP98-NSD1 oncofusion protein interacts with SMARCA5 (and BPTF) in NUP98-NSD1+ patient cells via the NUP98 FG repeat domains that mediate phase-separated condensate formation; SMARCA5 knockdown or pharmacological inhibition impairs transformation of NUP98-NSD1/FLT3-ITD immortalized hematopoietic cells; SMARCA5 inhibition does not affect condensate formation itself, indicating that SMARCA5 functional activity (not condensate assembly) is required for transformation.","method":"Affinity purification-mass spectrometry (AP-MS), inducible knockdown, pharmacological inhibition, proximity ligation assay, FRAP, b-isoxazole condensate assay, methylcellulose colony assay","journal":"Journal of experimental & clinical cancer research","confidence":"High","confidence_rationale":"Tier 1/2 / Strong — AP-MS interaction, multiple orthogonal validation methods, genetic and pharmacological functional assays, patient cell validation","pmids":["35073946"],"is_preprint":false},{"year":2022,"finding":"Conditional single- or double-allele Smarca5 deletion in primary mouse cells causes accelerated growth arrest and senescence, increased sensitivity to genotoxic insults, and dramatically decreased capacity to bypass senescence and immortalize; Smarca5 is required for DNA damage repair, telomere maintenance, cell cycle progression, and restriction of apoptosis and senescence.","method":"Conditional allele deletion, senescence assays, genotoxic sensitivity assays, transcriptome analysis, chromatin accessibility profiling","journal":"Cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — gene dosage-dependent conditional KO with multiple phenotypic and molecular readouts, single lab","pmids":["35269430"],"is_preprint":false},{"year":2023,"finding":"Acute degradation of endogenous SMARCA5 (via degron tag) causes a rapid increase in global nucleosome repeat length (greater chromatin compaction) with few changes in nascent transcription within 6 hours; SMARCA5 is required to control nucleosome repeat length at G1/S and during S phase; SMARCA5 co-localizes with CTCF and H2A.Z, and its loss causes rapid loss of CTCF DNA binding and disruption of nucleosomal phasing around CTCF binding sites.","method":"Degron-tag degradation system in three human cell lines, MNase-seq (nucleosome repeat length), nascent transcription assay, ChIP-seq (CTCF, H2A.Z), ATAC-seq","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 1 / Strong — rapid protein degradation with multiple genome-wide assays in three independent cell lines, rigorous spatiotemporal analysis","pmids":["36630954"],"is_preprint":false},{"year":2024,"finding":"The deubiquitinating enzyme USP3 directly interacts with SMARCA5 and removes K63-linked polyubiquitination of SMARCA5 to maintain its stability; USP3-mediated stabilization of SMARCA5 promotes DNA damage repair and chemotherapy (docetaxel) resistance in prostate cancer cells.","method":"Co-immunoprecipitation, ubiquitination assay (K63-linkage specific), siRNA knockdown/overexpression, in vitro and in vivo docetaxel resistance assays","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with linkage-specific ubiquitination assay and functional rescue, single lab","pmids":["39500888"],"is_preprint":false},{"year":2024,"finding":"Each subunit of the ACF complex (SMARCA5/SNF2H and ACF1/BAZ1A) accumulates at DNA lesions independently of its partner; recruitment of SMARCA5 and ACF1 to damage sites is not due to direct binding to ADP-ribose moieties but is facilitated by ADP-ribosylation-dependent chromatin unfolding/relaxation that permits DNA binding.","method":"Live-cell imaging of GFP-tagged proteins at laser-induced damage, ADP-ribose binding assays, chromatin relaxation assays","journal":"Molecular biology of the cell","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live imaging with mechanistic dissection, negative result on direct ADP-ribose binding is mechanistically informative, single lab","pmids":["38170578"],"is_preprint":false},{"year":2024,"finding":"SMARCA5 interaction with SND1 (staphylococcal nuclease domain-containing 1) is potentiated by PIM1-catalyzed phosphorylation of SND1 at serine 426; this SND1-SMARCA5 interaction mediates transcriptional activation of CUX1 in esophageal squamous cell carcinoma; disruption of SND1 S426 phosphorylation impairs the SND1-SMARCA5 interaction and inhibits ESCC tumor growth and metastasis in vivo.","method":"Co-immunoprecipitation, phosphorylation assay (PIM1 kinase), siRNA knockdown, reporter assays, in vivo xenograft","journal":"International journal of biological macromolecules","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with phospho-specific functional dissection, in vivo validation, single lab","pmids":["39725102"],"is_preprint":false},{"year":2024,"finding":"ALKBH5 inhibits SMARCA5 expression via m6A modification; RNF180 (E3 ubiquitin ligase) reduces ALKBH5 expression via ubiquitination, thereby de-repressing SMARCA5; elevated SMARCA5 promotes colon inflammation and Th17/Treg imbalance in ulcerative colitis mice.","method":"UC mouse model (DSS-induced), siRNA knockdown, flow cytometry (Th17/Treg), m6A modification assay, ubiquitination assay","journal":"Archives of pharmacal research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — mechanistic axis established with m6A and ubiquitination assays in mouse model, single lab","pmids":["39060657"],"is_preprint":false},{"year":2024,"finding":"SMARCA5 is required for germinal center (GC) formation; conditional depletion of Smarca5 in B cells does not affect naive B cell compartment but impairs effective proliferation during activation, immunoglobulin class switching, GC formation, and antibody-secreting cell differentiation; single-cell multiomic sequencing shows SMARCA5 is required for transcriptional modifications and genomic accessibility changes at genes supporting B cell activation.","method":"Conditional knockout in mice, single-cell multiomic sequencing (scRNA-seq + ATAC-seq), ribosomal pull-down, flow cytometry, immunization experiments","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean conditional KO with defined cellular and molecular phenotype, single-cell multiomic sequencing, multiple orthogonal methods","pmids":["39297882"],"is_preprint":false},{"year":2024,"finding":"CTCF recruits SMARCA5 to reposition the CTCF priming nucleosome (CPN) downstream of CTCF binding sites, creating nucleosome-free regions that enhance CTCF occupancy and cohesin stalling; this process requires non-methylated CPNs lacking repressive histone modifications.","method":"ChIP-seq, ATAC-seq, MNase-seq, CTCF motif orientation analysis, bioinformatic modeling","journal":"bioRxiv","confidence":"Low","confidence_rationale":"Tier 4 / Weak — preprint, primarily computational/bioinformatic with correlative genomic data; SMARCA5 functional contribution inferred rather than directly demonstrated","pmids":[],"is_preprint":true},{"year":2025,"finding":"SMARCA5 interacts with known cofactors BAZ1A/ACF and BAZ2A/TIP5 as well as DNA repair and recombination factors in the testis; germ cell-specific deletion of Smarca5 results in male infertility, meiotic progression failure at pachytene stage, abnormal chromosome synapsis, DNA repair defects, and transposon derepression; SMARCA5 restricts chromatin accessibility in male germ cells at promoters and repeat elements in spermatogonia to guide appropriate chromatin remodeling during meiotic recombination.","method":"Conditional knockout mouse (germ cell-specific), scRNA-seq, Co-IP (BAZ1A, BAZ2A, DNA repair factors), ATAC-seq, immunostaining","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1/2 / Strong — clean conditional KO with infertility phenotype, scRNA-seq, ATAC-seq, Co-IP with cofactors, multiple orthogonal methods","pmids":["40743397"],"is_preprint":false},{"year":2025,"finding":"During the perinatal transition from prospermatogonia to undifferentiated spermatogonia, SMARCA5 is recruited to binding sites of the pioneer transcription factor DMRT1 at distal enhancers and promoters of germline genes; the SMARCA5-DMRT1 pioneer complex establishes chromatin accessibility at these loci, generating poised enhancers/promoters as RA receptor binding sites, thereby licensing transcriptional responses to retinoic acid for spermatogenic differentiation.","method":"Germ cell-specific conditional knockout, ChIP-seq (DMRT1), ATAC-seq, Co-IP (SMARCA5-DMRT1), RA signaling assays","journal":"Research square / bioRxiv","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP interaction with genome-wide accessibility data and functional rescue, preprint status reduces confidence","pmids":["41282062","40837621"],"is_preprint":true},{"year":2025,"finding":"Smarca5 knockout in cerebellar granule cell neuron precursors (GCNPs) reduces their proliferative capacity and causes cerebellar hypoplasia; loss of Smarca5 inhibits SHH pathway activation and SHH-medulloblastoma cell proliferation; Smarca5 loss in a Ptch+/- SHH-MB mouse model prolongs survival.","method":"CRISPR-Cas9 dropout screen, conditional knockout in mice (GCNPs), proliferation assays, SHH pathway activity assays, in vivo tumor model","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean conditional KO with defined proliferative and pathway phenotype, in vivo tumor model, single lab","pmids":["40681754"],"is_preprint":false},{"year":2015,"finding":"hSNF2H/SMARCA5 interacts with RSF-1 (Rsf complex) in glioma cells; hSNF2H depletion decreases cyclin D1, cyclin E, p-Rb, MMP2, cIAP1, Bcl-2, and phosphorylation of IκBα and p65; changes in cyclin E, Bcl-2, and p-IκBα are not significant upon hSNF2H siRNA treatment in Rsf-1-depleted cells, indicating that hSNF2H regulates NF-κB pathway in an RSF-1-dependent manner.","method":"Co-immunoprecipitation, siRNA knockdown, Western blot, MTT/colony assay, Matrigel invasion assay","journal":"Tumour biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with epistasis experiment (RSF-1 depletion abrogates effect), single lab","pmids":["26666816"],"is_preprint":false},{"year":2021,"finding":"RSF1 requires hSNF2H/SMARCA5 and CEBP/β to co-transactivate the IL1B promoter, increasing IL-1β mRNA levels and secretion, thereby driving angiogenesis in myxofibrosarcoma.","method":"Co-immunoprecipitation (RSF1-hSNF2H), siRNA knockdown, RT-PCR, reporter assay (IL1B promoter), in vivo xenograft","journal":"Angiogenesis","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with promoter reporter assay and functional in vivo validation, single lab","pmids":["33496909"],"is_preprint":false},{"year":2020,"finding":"Aberrant (pro)renin receptor [(P)RR] expression upregulates SMARCA5 through a direct molecular interaction, resulting in failure of genomic stability pathways and induction of large numbers of point mutations and structural variations in human pancreatic ductal epithelial cells.","method":"Co-immunoprecipitation ((P)RR-SMARCA5), whole genome sequencing, cell transformation assays","journal":"Communications biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP with whole genome sequencing of genomic consequences, single lab","pmids":["33247206"],"is_preprint":false},{"year":2023,"finding":"SMARCA5 knockdown in hippocampal dentate gyrus impairs contextual fear conditioning memory maintenance and neurogenesis in mice; proteomics analysis reveals SMARCA5 modulates proteins of metabolic pathways (NME3, ACY1) as a mechanism underlying its role in memory.","method":"Knockdown via stereotaxic injection, fear conditioning behavioral assay, proteomics analysis, immunostaining","journal":"Neuroscience bulletin","confidence":"Low","confidence_rationale":"Tier 3 / Weak — knockdown with behavioral phenotype and correlative proteomics, no direct mechanistic pathway validation, single lab","pmids":["36807260"],"is_preprint":false}],"current_model":"SMARCA5 (hSNF2H/hISWI) is the catalytic ATPase subunit of ISWI-family chromatin remodeling complexes that uses ATP hydrolysis (requiring functional ATPase and SLIDE domains) to reposition and space nucleosomes, thereby regulating chromatin accessibility; it is recruited to DNA double-strand breaks in a PARP1/poly(ADP-ribosyl)ation-dependent manner (via ADP-ribosylation-induced chromatin relaxation, not direct PAR binding) to promote RNF168-dependent ubiquitin signaling and DSB repair, and to UV-damaged chromatin to facilitate transcription-coupled NER; it maintains nucleosome repeat length and CTCF-directed chromatin architecture continuously throughout the cell cycle; it forms complexes with multiple cofactors (ACF1/BAZ1A, BAZ2A, RSF-1, WSTF) and partners (DNMT3B, Cohesin, nucleolin, DMRT1) to fulfill context-specific roles in DNA replication, hematopoietic stem cell development and differentiation, T and B lymphocyte development, male meiosis and spermatogenesis, and transcriptional regulation, while its stability is maintained by USP3-mediated removal of K63-linked polyubiquitination."},"narrative":{"mechanistic_narrative":"SMARCA5 (hSNF2H/hISWI) is the human homologue of Drosophila ISWI and the catalytic ATPase subunit of ISWI-family chromatin remodeling machinery that uses its conserved SWI2/SNF2 ATPase domain to reposition and space nucleosomes, thereby setting chromatin accessibility across the genome [PMID:9730600, PMID:36630954]. Acute degradation of SMARCA5 rapidly increases global nucleosome repeat length and compacts chromatin while leaving nascent transcription largely intact within hours, establishing nucleosome spacing as its primary, continuous activity throughout G1/S and S phase [PMID:36630954]. A central output of this activity is CTCF-directed chromatin architecture: SMARCA5 co-localizes with CTCF and H2A.Z and is required for CTCF DNA binding and proper nucleosomal phasing around CTCF sites, and it associates with the Cohesin complex to support CTCF enhancer-blocking function [PMID:36630954, PMID:24498324]. SMARCA5 also operates in genome maintenance, being recruited to DNA double-strand breaks in a PARP1/poly(ADP-ribosyl)ation-dependent manner—through ADP-ribosylation-driven chromatin relaxation rather than direct PAR binding—where it promotes RNF168 accumulation and ubiquitin signaling for repair [PMID:23264744, PMID:38170578], and to UV-damaged chromatin via its functional ATPase, SLIDE, and HAND domains to facilitate CSB recruitment and transcription recovery during nucleotide excision repair [PMID:24990377]. It functions within ISWI cofactor complexes (ACF1/BAZ1A, BAZ2A/TIP5, RSF-1) and partners with sequence-specific and chromatin factors including DNMT3B, nucleolin, CTCF, and DMRT1 to fulfill context-specific roles in remodeling-dependent gene regulation [PMID:15120635, PMID:40743397, PMID:26666816, PMID:32756943, PMID:41282062, PMID:40837621]. Through these activities SMARCA5 is essential for definitive hematopoiesis and erythroid/myeloid maturation, T and B lymphocyte development and germinal center formation, male meiosis and spermatogenesis, and cell-cycle progression, with its loss frequently triggering p53 activation, senescence, and chromatid-segregation defects [PMID:28276606, PMID:31068388, PMID:39297882, PMID:40743397, PMID:32197313, PMID:35269430]. Its protein stability is maintained by USP3-mediated removal of K63-linked polyubiquitination [PMID:39500888].","teleology":[{"year":1998,"claim":"Established the molecular identity of SMARCA5 by cloning it as a human ISWI homologue, predicting a chromatin-remodeling ATPase before any function was tested.","evidence":"cDNA cloning, sequence homology, Northern blot and FISH mapping","pmids":["9730600"],"confidence":"Medium","gaps":["No functional reconstitution of remodeling activity","No in vivo phenotype defined"]},{"year":2004,"claim":"Connected SMARCA5 to repressive epigenetic machinery, indicating it acts at heterochromatin in concert with DNA methylation and silencing factors.","evidence":"Co-IP, GST pull-down, immunofluorescence co-localization and ATPase assay in human cells","pmids":["15120635"],"confidence":"Medium","gaps":["Interactions from a single lab without reciprocal genome-wide validation","Functional consequence of DNMT3B association not tested"]},{"year":2009,"claim":"Defined SMARCA5 as a global regulator of chromatin structure in vivo, predominantly euchromatic with effects on histone modification and heterochromatin organization.","evidence":"Confocal immunostaining and heterozygous mouse model","pmids":["19482671"],"confidence":"Medium","gaps":["Heterozygous model gives partial loss-of-function only","Direct nucleosome-level mechanism not assayed"]},{"year":2012,"claim":"Placed SMARCA5 in the DNA double-strand break response, showing PARP1/PAR-dependent recruitment that drives RNF168 ubiquitin signaling and BRCA1 assembly.","evidence":"Reciprocal Co-IP, laser-damage live imaging, siRNA, IR sensitivity and PAR functional assays","pmids":["23264744"],"confidence":"High","gaps":["Whether remodeling ATPase activity is required for RNF168 promotion not dissected here","Mechanism of PAR-dependent recruitment left to later work"]},{"year":2014,"claim":"Extended SMARCA5's DNA-damage role to nucleotide excision repair, showing domain-dependent recruitment to UV lesions and a requirement for transcription recovery.","evidence":"Live imaging, domain-deletion mutagenesis, UV-C damage and transcription recovery assays","pmids":["24990377"],"confidence":"High","gaps":["Substrate nucleosome substrate at lesions not directly characterized","Relative contributions of ACF1/WSTF complexes not separated"]},{"year":2014,"claim":"Linked SMARCA5 to genome architecture by showing it facilitates CTCF binding and enhancer-blocking together with Cohesin, with a lineage-specific output at SPI1.","evidence":"ChIP, Co-IP and enhancer-blocking reporter assays in myeloid/AML cells","pmids":["24498324"],"confidence":"Medium","gaps":["Direct vs indirect facilitation of CTCF binding unresolved at this stage","Genome-wide scope not yet established"]},{"year":2017,"claim":"Demonstrated that SMARCA5 is essential for definitive hematopoiesis, with loss blocking erythroid/myeloid maturation and activating p53.","evidence":"Multiple conditional-Cre knockout mouse models, hematopoietic phenotyping, p53 modification Western blots","pmids":["28276606"],"confidence":"High","gaps":["Whether p53 activation is cause or consequence of the maturation block not fully resolved","Direct chromatin targets in HSPCs not mapped"]},{"year":2019,"claim":"Showed SMARCA5 is required for lymphocyte development, with stage-specific blocks and only partial p53-dependence, distinguishing remodeling defects from p53-driven death.","evidence":"Conditional knockout, flow cytometry, expression profiling, p53 epistasis","pmids":["31068388"],"confidence":"High","gaps":["p53-independent component of the developmental block mechanistically undefined","Direct target loci at DN3/pro-B stages not identified"]},{"year":2020,"claim":"Implicated SMARCA5 in mitotic fidelity and chromatid cohesion, beyond its interphase chromatin roles.","evidence":"CRISPR/Cas9 knockout in AML cell lines, cell cycle and cytogenetic analysis","pmids":["32197313"],"confidence":"Medium","gaps":["Molecular basis of premature chromatid separation not defined","Single lab, AML-cell-line specific"]},{"year":2021,"claim":"Established SMARCA5 as a maintainer of chromatin accessibility at lineage-gene promoters, acting with nucleolin to license transcription-factor binding in hematopoiesis.","evidence":"ATAC-seq, RNA-seq, Co-IP (nucleolin) in zebrafish HSPCs","pmids":["32756943"],"confidence":"Medium","gaps":["Direct biochemical role of nucleolin in remodeling not reconstituted","Single lab/model"]},{"year":2021,"claim":"Generalized the accessibility-licensing model to differentiation programs, showing lncRNA-guided SMARCA5 opens myogenic loci and a developmental requirement in embryos.","evidence":"Co-IP (lncMREF), ATAC-seq, ChIP-seq in muscle satellite cells; siRNA depletion with RNA-seq in mouse/bovine embryos","pmids":["36200826","33899080"],"confidence":"Medium","gaps":["How lncRNA guides SMARCA5 to specific loci unresolved","Species differences in embryo requirement unexplained"]},{"year":2021,"claim":"Provided a clean epistatic chain showing SMARCA5 controls a specific physiological program (RBC homeostasis) via accessibility at the keap1a promoter upstream of Keap1-Nrf2.","evidence":"Zebrafish mutant, ATAC-seq, RNA-seq, keap1a/hmox1a rescue experiments","pmids":["34698638"],"confidence":"High","gaps":["Direct binding of SMARCA5 at keap1a vs broader chromatin effects not distinguished","Mammalian conservation of the axis not tested here"]},{"year":2022,"claim":"Identified SMARCA5 as a functionally required partner of the NUP98-NSD1 oncofusion, showing its remodeling activity (not condensate assembly) drives leukemic transformation.","evidence":"AP-MS, inducible knockdown, pharmacological inhibition, PLA, FRAP, colony assays in patient cells","pmids":["35073946"],"confidence":"High","gaps":["Specific chromatin targets of the SMARCA5-NUP98-NSD1 module not mapped","Mechanism linking remodeling to transformation incomplete"]},{"year":2022,"claim":"Defined a dosage-dependent requirement for SMARCA5 in restraining senescence and supporting immortalization, telomere maintenance and DNA repair.","evidence":"Conditional single/double-allele deletion, senescence and genotoxic assays, transcriptome and accessibility profiling","pmids":["35269430"],"confidence":"Medium","gaps":["Direct mechanism of telomere maintenance not established","Single lab"]},{"year":2023,"claim":"Resolved the core nucleosome-spacing function with temporal precision, showing acute SMARCA5 loss compacts chromatin and abolishes CTCF binding before transcription changes accumulate.","evidence":"Degron degradation in three human cell lines, MNase-seq, nascent transcription, CTCF/H2A.Z ChIP-seq, ATAC-seq","pmids":["36630954"],"confidence":"High","gaps":["How CTCF directs SMARCA5 to specific sites not fully resolved here","Downstream transcriptional consequences over longer timescales not profiled"]},{"year":2024,"claim":"Clarified the DSB recruitment mechanism, showing ACF subunits accumulate independently and via ADP-ribosylation-driven chromatin relaxation rather than direct PAR binding.","evidence":"Live imaging of GFP-tagged subunits, ADP-ribose binding and chromatin relaxation assays","pmids":["38170578"],"confidence":"Medium","gaps":["Quantitative contribution of relaxation vs other signals not measured","Single lab"]},{"year":2024,"claim":"Identified a post-translational control point, USP3-mediated removal of K63 polyubiquitin, governing SMARCA5 stability and chemoresistance.","evidence":"Co-IP, K63-linkage-specific ubiquitination assays, knockdown/overexpression, docetaxel resistance in vitro and in vivo","pmids":["39500888"],"confidence":"Medium","gaps":["E3 ligase generating the K63 chains not identified","Single lab"]},{"year":2024,"claim":"Demonstrated SMARCA5 is required for germinal center formation and B cell activation through transcriptional and accessibility remodeling.","evidence":"Conditional knockout, single-cell multiomics (scRNA + ATAC), ribosomal pull-down, immunization","pmids":["39297882"],"confidence":"High","gaps":["Specific enhancers/promoters mechanistically responsible not isolated","Recruitment determinants in activated B cells unknown"]},{"year":2024,"claim":"Extended SMARCA5's reach to cancer signaling and inflammation through phospho-regulated partner interactions and upstream m6A/ubiquitin control of its levels.","evidence":"Co-IP with PIM1 phospho-SND1 and reporter/xenograft assays (ESCC); DSS UC mouse model with m6A (ALKBH5) and RNF180 ubiquitination assays","pmids":["39725102","39060657"],"confidence":"Medium","gaps":["Whether remodeling activity is required for these transcriptional outputs not separated","Direct vs indirect roles in each disease context unresolved"]},{"year":2025,"claim":"Established SMARCA5 as essential for male meiosis and spermatogenesis, restricting chromatin accessibility in germ cells to enable synapsis, DNA repair and transposon silencing.","evidence":"Germ-cell-specific conditional knockout, scRNA-seq, ATAC-seq, Co-IP with BAZ1A/BAZ2A and repair factors","pmids":["40743397"],"confidence":"High","gaps":["How accessibility restriction is targeted to repeats/promoters not mechanistically resolved","Direct role in meiotic recombination machinery not biochemically defined"]},{"year":2025,"claim":"Proposed a pioneer-factor partnership in which SMARCA5 is recruited by DMRT1 to license retinoic-acid-responsive enhancers for spermatogenic differentiation.","evidence":"Conditional knockout, DMRT1 ChIP-seq, ATAC-seq, Co-IP (preprint)","pmids":["41282062","40837621"],"confidence":"Medium","gaps":["Preprint, not peer-reviewed","Direct demonstration that SMARCA5 remodeling generates RA-receptor sites needed"]},{"year":2025,"claim":"Implicated SMARCA5 in cerebellar neural precursor proliferation and SHH-medulloblastoma growth.","evidence":"CRISPR dropout screen, conditional knockout, SHH pathway and in vivo tumor assays","pmids":["40681754"],"confidence":"Medium","gaps":["Mechanistic link between SMARCA5 remodeling and SHH pathway activation undefined","Single lab"]},{"year":null,"claim":"How SMARCA5 is selectively targeted to specific genomic loci across its many contexts—and whether its ATPase remodeling activity is required for each transcriptional and disease output—remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model for site selection by CTCF, DMRT1, lncRNAs, and cofactor complexes","Catalytic dependence not tested for many reported functions","No high-resolution structural model of the remodeling reaction in the timeline"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140657","term_label":"ATP-dependent activity","supporting_discovery_ids":[0,4,15]},{"term_id":"GO:0140096","term_label":"catalytic activity, acting on a protein","supporting_discovery_ids":[4,15]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[5,17]},{"term_id":"GO:0042393","term_label":"histone binding","supporting_discovery_ids":[1,2]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[2,15]},{"term_id":"GO:0000228","term_label":"nuclear chromosome","supporting_discovery_ids":[2,3]},{"term_id":"GO:0005730","term_label":"nucleolus","supporting_discovery_ids":[2,9]}],"pathway":[{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[0,15]},{"term_id":"R-HSA-73894","term_label":"DNA Repair","supporting_discovery_ids":[3,4,17]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[5,9,15]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[8,14,15]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[6,7,20,22]}],"complexes":["ACF (SMARCA5-BAZ1A/ACF1)","RSF (SMARCA5-RSF1)","BAZ2A/TIP5 complex"],"partners":["BAZ1A","BAZ2A","RSF1","CTCF","DNMT3B","DMRT1","RNF168","USP3"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O60264","full_name":"SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily A member 5","aliases":["Sucrose nonfermenting protein 2 homolog","hSNF2H"],"length_aa":1052,"mass_kda":121.9,"function":"ATPase that possesses intrinsic ATP-dependent nucleosome-remodeling activity (PubMed:12972596, PubMed:28801535). Catalytic subunit of ISWI chromatin-remodeling complexes, which form ordered nucleosome arrays on chromatin and facilitate access to DNA during DNA-templated processes such as DNA replication, transcription, and repair; this may require intact histone H4 tails (PubMed:10880450, PubMed:12198550, PubMed:12434153, PubMed:12972596, PubMed:23911928, PubMed:28801535). Within the ISWI chromatin-remodeling complexes, slides edge- and center-positioned histone octamers away from their original location on the DNA template (PubMed:28801535). Catalytic activity and histone octamer sliding propensity is regulated and determined by components of the ISWI chromatin-remodeling complexes (PubMed:28801535). The BAZ1A/ACF1-, BAZ1B/WSTF-, BAZ2A/TIP5- and BAZ2B-containing ISWI chromatin-remodeling complexes regulate the spacing of nucleosomes along the chromatin and have the ability to slide mononucleosomes to the center of a DNA template in an ATP-dependent manner (PubMed:14759371, PubMed:15543136, PubMed:28801535). The CECR2- and RSF1-containing ISWI chromatin-remodeling complexes do not have the ability to slide mononucleosomes to the center of a DNA template (PubMed:28801535). Binds to core histones together with RSF1, and is required for the assembly of regular nucleosome arrays by the RSF-5 ISWI chromatin-remodeling complex (PubMed:12972596). Involved in DNA replication and together with BAZ1A/ACF1 is required for replication of pericentric heterochromatin in S-phase (PubMed:12434153). Probably plays a role in repression of RNA polymerase I dependent transcription of the rDNA locus, through the recruitment of the SIN3/HDAC1 corepressor complex to the rDNA promoter (By similarity). Essential component of the WICH-5 ISWI chromatin-remodeling complex (also called the WICH complex), a chromatin-remodeling complex that mobilizes nucleosomes and reconfigures irregular chromatin to a regular nucleosomal array structure (PubMed:11980720, PubMed:15543136). The WICH-5 ISWI chromatin-remodeling complex regulates the transcription of various genes, has a role in RNA polymerase I transcription (By similarity). Within the B-WICH complex has a role in RNA polymerase III transcription (PubMed:16603771). Mediates the histone H2AX phosphorylation at 'Tyr-142', and is involved in the maintenance of chromatin structures during DNA replication processes (By similarity). Essential component of NoRC-5 ISWI chromatin-remodeling complex, a complex that mediates silencing of a fraction of rDNA by recruiting histone-modifying enzymes and DNA methyltransferases, leading to heterochromatin formation and transcriptional silencing (By similarity)","subcellular_location":"Nucleus; Chromosome","url":"https://www.uniprot.org/uniprotkb/O60264/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/SMARCA5","classification":"Not 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MIR99A","url":"https://www.omim.org/entry/614509"},{"mim_id":"613186","title":"MICRO RNA 100; MIR100","url":"https://www.omim.org/entry/613186"},{"mim_id":"607268","title":"CHROMATIN ACCESSIBILITY COMPLEX, SUBUNIT 1; CHRAC1","url":"https://www.omim.org/entry/607268"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"},{"location":"Nucleoli fibrillar center","reliability":"Additional"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/SMARCA5"},"hgnc":{"alias_symbol":["hSNF2H","hISWI","ISWI"],"prev_symbol":[]},"alphafold":{"accession":"O60264","domains":[{"cath_id":"3.40.50.10810","chopping":"181-391","consensus_level":"medium","plddt":85.3124,"start":181,"end":391},{"cath_id":"3.40.50.300","chopping":"407-416_479-645_667-695","consensus_level":"high","plddt":85.2552,"start":407,"end":695},{"cath_id":"1.10.1040.30","chopping":"772-900","consensus_level":"medium","plddt":85.256,"start":772,"end":900},{"cath_id":"1.10.10.60","chopping":"906-1017","consensus_level":"high","plddt":85.7483,"start":906,"end":1017}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O60264","model_url":"https://alphafold.ebi.ac.uk/files/AF-O60264-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O60264-F1-predicted_aligned_error_v6.png","plddt_mean":74.56},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=SMARCA5","jax_strain_url":"https://www.jax.org/strain/search?query=SMARCA5"},"sequence":{"accession":"O60264","fasta_url":"https://rest.uniprot.org/uniprotkb/O60264.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O60264/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O60264"}},"corpus_meta":[{"pmid":"23264744","id":"PMC_23264744","title":"Poly(ADP-ribosyl)ation 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human homologue of Drosophila ISWI, encoding a 1,052 amino-acid protein with a conserved ATPase domain characteristic of the SWI2/SNF2 family, mapped to chromosome 4q31.1→q31.2, suggesting a role in chromatin remodeling.\",\n      \"method\": \"cDNA cloning, sequence homology analysis, Northern blot, FISH mapping\",\n      \"journal\": \"Cytogenetics and cell genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct cloning and structural characterization with multiple methods in one study, but no functional reconstitution\",\n      \"pmids\": [\"9730600\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"SMARCA5/hSNF2H physically interacts with the de novo DNA methyltransferase DNMT3B, as well as HDAC1, HDAC2, HP1 proteins, and Suv39h1; endogenous hSNF2H is associated with DNA methyltransferase activity, co-localizing with DNMT3B in heterochromatic regions.\",\n      \"method\": \"Co-immunoprecipitation, GST pull-down, immunofluorescence co-localization, ATPase activity assay\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP and GST pull-down in single lab, with functional activity assay\",\n      \"pmids\": [\"15120635\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Smarca5 (Snf2h) is localized predominantly to euchromatin, with lesser presence in heterochromatin and nucleoli; Smarca5 heterozygous mice show decreased histone H3 modifications and defects in heterochromatin foci, indicating Smarca5 is a key regulator of global chromatin structure.\",\n      \"method\": \"Confocal microscopy, immunostaining with histone modification markers, heterozygous mouse model\",\n      \"journal\": \"Frontiers in bioscience (Elite edition)\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct localization with functional consequence in mouse model, single lab\",\n      \"pmids\": [\"19482671\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"SMARCA5/SNF2H is recruited to DNA double-strand breaks (DSBs) in a PARP1-dependent manner; SMARCA5 and RNF168 interact in a DNA damage- and PARP-dependent manner; RNF168 undergoes poly(ADP-ribosyl)ation after DNA damage, and PAR chains plus RNF168 are required for SMARCA5 binding; SMARCA5 promotes RNF168 accumulation at DSBs to facilitate ubiquitin conjugation and BRCA1 assembly; SMARCA5 depletion renders cells sensitive to IR and causes DSB repair defects.\",\n      \"method\": \"Co-immunoprecipitation, live-cell imaging (recruitment to laser-induced DSBs), siRNA knockdown, IR sensitivity assay, PAR chain functional assays\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP, live imaging, multiple functional readouts, mechanistic dissection with PAR dependency, single rigorous study with orthogonal methods\",\n      \"pmids\": [\"23264744\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SMARCA5/SNF2H and its binding partners ACF1 and WSTF are recruited to UV-C-induced DNA damage to facilitate CSB binding and promote transcription recovery after NER; SMARCA5 targeting to UV-C damage depends on transcription, histone modifications, and requires functional SWI2/SNF2-ATPase and SLIDE domains; after initial recruitment, SMARCA5 re-localizes away from the damage center requiring its HAND domain.\",\n      \"method\": \"Live-cell imaging, domain-deletion mutagenesis, UV-C local damage assays, CSB recruitment assay, transcription recovery assay\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — live imaging combined with domain mutagenesis and functional transcription recovery readout in a single rigorous study\",\n      \"pmids\": [\"24990377\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"SMARCA5 facilitates CTCF binding to its target DNA sites and supports the CTCF enhancer-blocking function at the ICR; SMARCA5 associates with the Cohesin complex and is recruited together with CTCF and Cohesin members to the SPI1 gene -14.4 Enhancer in differentiating myeloid cells, blocking SPI1 (PU.1) expression.\",\n      \"method\": \"ChIP assays, co-immunoprecipitation, reporter/enhancer-blocking assays, AML primary cell analysis\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP and Co-IP in single lab with two orthogonal methods, functional enhancer-blocking assay\",\n      \"pmids\": [\"24498324\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Conditional deletion of Smarca5 at the onset of definitive hematopoiesis causes embryonic lethality due to anemia; hematopoietic stem and progenitor cells accumulate but fail to mature into erythroid and myeloid lineages; Smarca5 deficiency increases p53 levels and activates p53 targets, including at residues associated with DNA damage (S15Ph) and CBP/p300 (K376Ac); deletion in committed erythroid cells causes postnatal anemia; ex vivo deletion confirms requirement for erythroid cell proliferation.\",\n      \"method\": \"Conditional knockout mouse models (Vav1-iCre, Epor-iCre, 4-OHT-inducible), hematopoietic phenotyping, Western blot for p53 modifications, flow cytometry\",\n      \"journal\": \"Stem cells (Dayton, Ohio)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean conditional KO with defined cellular phenotype, multiple Cre drivers, mechanistic dissection of p53 pathway\",\n      \"pmids\": [\"28276606\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"SMARCA5 is required for thymocyte development: conditional knockout causes a developmental block at the DN3 stage of αβ thymocytes and pro-B stage of early B cells; loss leads to massive apoptosis of β-selected DN3 cells, premitotic arrest of DP cells, persistent expression of immature markers (CD44, CD25), and p53 pathway activation; p53 deficiency partially rescues thymus cellularity but not the developmental defects.\",\n      \"method\": \"Conditional knockout mouse model, flow cytometry, gene expression profiling, epistasis with p53 knockout\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean conditional KO with defined cellular phenotype, multiple developmental stage readouts, genetic epistasis with p53\",\n      \"pmids\": [\"31068388\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"CRISPR/Cas9-mediated SMARCA5 knockout in AML cell lines inhibits cell cycle progression, induces karyorrhexis and nuclear budding, increases ploidy, and causes premature chromatid separation, indicating a role in mitotic division and chromatid cohesion.\",\n      \"method\": \"CRISPR/Cas9 knockout, cell cycle analysis, cytogenetic analysis, flow cytometry\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean CRISPR KO in multiple AML cell lines, multiple phenotypic readouts, single lab\",\n      \"pmids\": [\"32197313\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Smarca5 interacts with nucleolin to promote chromatin remodeling in zebrafish fetal hematopoietic stem and progenitor cells, thereby facilitating genomic binding of transcription factors to regulate expression of hematopoietic regulators such as bcl11ab; Smarca5 is responsible for maintenance of chromatin accessibility at promoters of hematopoiesis-related genes.\",\n      \"method\": \"ATAC-seq, RNA-seq, Co-immunoprecipitation (Smarca5-nucleolin interaction), functional assays in zebrafish\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP interaction validated with chromatin accessibility profiling and functional zebrafish model, single lab\",\n      \"pmids\": [\"32756943\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"SMARCA5 depletion in mouse preimplantation embryos reduces developmental capability, compromises inner cell mass specification and differentiation (OCT4 not restricted to ICM, reduced NANOG and SOX17), and dysregulates 402 genes at the blastocyst stage; in bovine embryos, depletion does not affect blastocyst development but compromises quality and disrupts primitive endoderm formation (reduced GATA6).\",\n      \"method\": \"siRNA-mediated depletion in mouse and bovine embryos, immunostaining, RNA-seq\",\n      \"journal\": \"Biology of reproduction\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with defined molecular phenotype in two species, RNA-seq, single lab\",\n      \"pmids\": [\"33899080\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"The lncRNA lncMREF interacts with Smarca5 to promote chromatin accessibility when muscle satellite cells are activated and differentiate, facilitating genomic binding of p300/CBP/H3K27ac and upregulating myogenic regulators such as MyoD.\",\n      \"method\": \"Co-immunoprecipitation (lncMREF-Smarca5), ATAC-seq, ChIP-seq for H3K27ac/p300, loss-of-function experiments in mouse\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP interaction with chromatin accessibility functional readout, single lab\",\n      \"pmids\": [\"36200826\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"In zebrafish, smarca5-deficient red blood cells form blood clots; smarca5 deletion decreases chromatin accessibility at the keap1a promoter and reduces keap1a expression, leading to elevated hmox1a (a downstream target of Keap1-Nrf2 signaling); overexpression of keap1a or knockdown of hmox1a partially rescues blood clot formation, placing smarca5 upstream of the Keap1-Nrf2 pathway in RBC homeostasis.\",\n      \"method\": \"Zebrafish mutant model, ATAC-seq, RNA-seq, drug treatment, rescue experiments (keap1a overexpression, hmox1a knockdown)\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic loss-of-function with defined phenotype, ATAC-seq, epistasis rescue experiments, multiple orthogonal methods in one study\",\n      \"pmids\": [\"34698638\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"NUP98-NSD1 oncofusion protein interacts with SMARCA5 (and BPTF) in NUP98-NSD1+ patient cells via the NUP98 FG repeat domains that mediate phase-separated condensate formation; SMARCA5 knockdown or pharmacological inhibition impairs transformation of NUP98-NSD1/FLT3-ITD immortalized hematopoietic cells; SMARCA5 inhibition does not affect condensate formation itself, indicating that SMARCA5 functional activity (not condensate assembly) is required for transformation.\",\n      \"method\": \"Affinity purification-mass spectrometry (AP-MS), inducible knockdown, pharmacological inhibition, proximity ligation assay, FRAP, b-isoxazole condensate assay, methylcellulose colony assay\",\n      \"journal\": \"Journal of experimental & clinical cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1/2 / Strong — AP-MS interaction, multiple orthogonal validation methods, genetic and pharmacological functional assays, patient cell validation\",\n      \"pmids\": [\"35073946\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Conditional single- or double-allele Smarca5 deletion in primary mouse cells causes accelerated growth arrest and senescence, increased sensitivity to genotoxic insults, and dramatically decreased capacity to bypass senescence and immortalize; Smarca5 is required for DNA damage repair, telomere maintenance, cell cycle progression, and restriction of apoptosis and senescence.\",\n      \"method\": \"Conditional allele deletion, senescence assays, genotoxic sensitivity assays, transcriptome analysis, chromatin accessibility profiling\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — gene dosage-dependent conditional KO with multiple phenotypic and molecular readouts, single lab\",\n      \"pmids\": [\"35269430\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"Acute degradation of endogenous SMARCA5 (via degron tag) causes a rapid increase in global nucleosome repeat length (greater chromatin compaction) with few changes in nascent transcription within 6 hours; SMARCA5 is required to control nucleosome repeat length at G1/S and during S phase; SMARCA5 co-localizes with CTCF and H2A.Z, and its loss causes rapid loss of CTCF DNA binding and disruption of nucleosomal phasing around CTCF binding sites.\",\n      \"method\": \"Degron-tag degradation system in three human cell lines, MNase-seq (nucleosome repeat length), nascent transcription assay, ChIP-seq (CTCF, H2A.Z), ATAC-seq\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — rapid protein degradation with multiple genome-wide assays in three independent cell lines, rigorous spatiotemporal analysis\",\n      \"pmids\": [\"36630954\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"The deubiquitinating enzyme USP3 directly interacts with SMARCA5 and removes K63-linked polyubiquitination of SMARCA5 to maintain its stability; USP3-mediated stabilization of SMARCA5 promotes DNA damage repair and chemotherapy (docetaxel) resistance in prostate cancer cells.\",\n      \"method\": \"Co-immunoprecipitation, ubiquitination assay (K63-linkage specific), siRNA knockdown/overexpression, in vitro and in vivo docetaxel resistance assays\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with linkage-specific ubiquitination assay and functional rescue, single lab\",\n      \"pmids\": [\"39500888\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Each subunit of the ACF complex (SMARCA5/SNF2H and ACF1/BAZ1A) accumulates at DNA lesions independently of its partner; recruitment of SMARCA5 and ACF1 to damage sites is not due to direct binding to ADP-ribose moieties but is facilitated by ADP-ribosylation-dependent chromatin unfolding/relaxation that permits DNA binding.\",\n      \"method\": \"Live-cell imaging of GFP-tagged proteins at laser-induced damage, ADP-ribose binding assays, chromatin relaxation assays\",\n      \"journal\": \"Molecular biology of the cell\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live imaging with mechanistic dissection, negative result on direct ADP-ribose binding is mechanistically informative, single lab\",\n      \"pmids\": [\"38170578\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"SMARCA5 interaction with SND1 (staphylococcal nuclease domain-containing 1) is potentiated by PIM1-catalyzed phosphorylation of SND1 at serine 426; this SND1-SMARCA5 interaction mediates transcriptional activation of CUX1 in esophageal squamous cell carcinoma; disruption of SND1 S426 phosphorylation impairs the SND1-SMARCA5 interaction and inhibits ESCC tumor growth and metastasis in vivo.\",\n      \"method\": \"Co-immunoprecipitation, phosphorylation assay (PIM1 kinase), siRNA knockdown, reporter assays, in vivo xenograft\",\n      \"journal\": \"International journal of biological macromolecules\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with phospho-specific functional dissection, in vivo validation, single lab\",\n      \"pmids\": [\"39725102\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ALKBH5 inhibits SMARCA5 expression via m6A modification; RNF180 (E3 ubiquitin ligase) reduces ALKBH5 expression via ubiquitination, thereby de-repressing SMARCA5; elevated SMARCA5 promotes colon inflammation and Th17/Treg imbalance in ulcerative colitis mice.\",\n      \"method\": \"UC mouse model (DSS-induced), siRNA knockdown, flow cytometry (Th17/Treg), m6A modification assay, ubiquitination assay\",\n      \"journal\": \"Archives of pharmacal research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — mechanistic axis established with m6A and ubiquitination assays in mouse model, single lab\",\n      \"pmids\": [\"39060657\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"SMARCA5 is required for germinal center (GC) formation; conditional depletion of Smarca5 in B cells does not affect naive B cell compartment but impairs effective proliferation during activation, immunoglobulin class switching, GC formation, and antibody-secreting cell differentiation; single-cell multiomic sequencing shows SMARCA5 is required for transcriptional modifications and genomic accessibility changes at genes supporting B cell activation.\",\n      \"method\": \"Conditional knockout in mice, single-cell multiomic sequencing (scRNA-seq + ATAC-seq), ribosomal pull-down, flow cytometry, immunization experiments\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean conditional KO with defined cellular and molecular phenotype, single-cell multiomic sequencing, multiple orthogonal methods\",\n      \"pmids\": [\"39297882\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"CTCF recruits SMARCA5 to reposition the CTCF priming nucleosome (CPN) downstream of CTCF binding sites, creating nucleosome-free regions that enhance CTCF occupancy and cohesin stalling; this process requires non-methylated CPNs lacking repressive histone modifications.\",\n      \"method\": \"ChIP-seq, ATAC-seq, MNase-seq, CTCF motif orientation analysis, bioinformatic modeling\",\n      \"journal\": \"bioRxiv\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 4 / Weak — preprint, primarily computational/bioinformatic with correlative genomic data; SMARCA5 functional contribution inferred rather than directly demonstrated\",\n      \"pmids\": [],\n      \"is_preprint\": true\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SMARCA5 interacts with known cofactors BAZ1A/ACF and BAZ2A/TIP5 as well as DNA repair and recombination factors in the testis; germ cell-specific deletion of Smarca5 results in male infertility, meiotic progression failure at pachytene stage, abnormal chromosome synapsis, DNA repair defects, and transposon derepression; SMARCA5 restricts chromatin accessibility in male germ cells at promoters and repeat elements in spermatogonia to guide appropriate chromatin remodeling during meiotic recombination.\",\n      \"method\": \"Conditional knockout mouse (germ cell-specific), scRNA-seq, Co-IP (BAZ1A, BAZ2A, DNA repair factors), ATAC-seq, immunostaining\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1/2 / Strong — clean conditional KO with infertility phenotype, scRNA-seq, ATAC-seq, Co-IP with cofactors, multiple orthogonal methods\",\n      \"pmids\": [\"40743397\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"During the perinatal transition from prospermatogonia to undifferentiated spermatogonia, SMARCA5 is recruited to binding sites of the pioneer transcription factor DMRT1 at distal enhancers and promoters of germline genes; the SMARCA5-DMRT1 pioneer complex establishes chromatin accessibility at these loci, generating poised enhancers/promoters as RA receptor binding sites, thereby licensing transcriptional responses to retinoic acid for spermatogenic differentiation.\",\n      \"method\": \"Germ cell-specific conditional knockout, ChIP-seq (DMRT1), ATAC-seq, Co-IP (SMARCA5-DMRT1), RA signaling assays\",\n      \"journal\": \"Research square / bioRxiv\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP interaction with genome-wide accessibility data and functional rescue, preprint status reduces confidence\",\n      \"pmids\": [\"41282062\", \"40837621\"],\n      \"is_preprint\": true\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Smarca5 knockout in cerebellar granule cell neuron precursors (GCNPs) reduces their proliferative capacity and causes cerebellar hypoplasia; loss of Smarca5 inhibits SHH pathway activation and SHH-medulloblastoma cell proliferation; Smarca5 loss in a Ptch+/- SHH-MB mouse model prolongs survival.\",\n      \"method\": \"CRISPR-Cas9 dropout screen, conditional knockout in mice (GCNPs), proliferation assays, SHH pathway activity assays, in vivo tumor model\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean conditional KO with defined proliferative and pathway phenotype, in vivo tumor model, single lab\",\n      \"pmids\": [\"40681754\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"hSNF2H/SMARCA5 interacts with RSF-1 (Rsf complex) in glioma cells; hSNF2H depletion decreases cyclin D1, cyclin E, p-Rb, MMP2, cIAP1, Bcl-2, and phosphorylation of IκBα and p65; changes in cyclin E, Bcl-2, and p-IκBα are not significant upon hSNF2H siRNA treatment in Rsf-1-depleted cells, indicating that hSNF2H regulates NF-κB pathway in an RSF-1-dependent manner.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, Western blot, MTT/colony assay, Matrigel invasion assay\",\n      \"journal\": \"Tumour biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with epistasis experiment (RSF-1 depletion abrogates effect), single lab\",\n      \"pmids\": [\"26666816\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"RSF1 requires hSNF2H/SMARCA5 and CEBP/β to co-transactivate the IL1B promoter, increasing IL-1β mRNA levels and secretion, thereby driving angiogenesis in myxofibrosarcoma.\",\n      \"method\": \"Co-immunoprecipitation (RSF1-hSNF2H), siRNA knockdown, RT-PCR, reporter assay (IL1B promoter), in vivo xenograft\",\n      \"journal\": \"Angiogenesis\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with promoter reporter assay and functional in vivo validation, single lab\",\n      \"pmids\": [\"33496909\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"Aberrant (pro)renin receptor [(P)RR] expression upregulates SMARCA5 through a direct molecular interaction, resulting in failure of genomic stability pathways and induction of large numbers of point mutations and structural variations in human pancreatic ductal epithelial cells.\",\n      \"method\": \"Co-immunoprecipitation ((P)RR-SMARCA5), whole genome sequencing, cell transformation assays\",\n      \"journal\": \"Communications biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP with whole genome sequencing of genomic consequences, single lab\",\n      \"pmids\": [\"33247206\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"SMARCA5 knockdown in hippocampal dentate gyrus impairs contextual fear conditioning memory maintenance and neurogenesis in mice; proteomics analysis reveals SMARCA5 modulates proteins of metabolic pathways (NME3, ACY1) as a mechanism underlying its role in memory.\",\n      \"method\": \"Knockdown via stereotaxic injection, fear conditioning behavioral assay, proteomics analysis, immunostaining\",\n      \"journal\": \"Neuroscience bulletin\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — knockdown with behavioral phenotype and correlative proteomics, no direct mechanistic pathway validation, single lab\",\n      \"pmids\": [\"36807260\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"SMARCA5 (hSNF2H/hISWI) is the catalytic ATPase subunit of ISWI-family chromatin remodeling complexes that uses ATP hydrolysis (requiring functional ATPase and SLIDE domains) to reposition and space nucleosomes, thereby regulating chromatin accessibility; it is recruited to DNA double-strand breaks in a PARP1/poly(ADP-ribosyl)ation-dependent manner (via ADP-ribosylation-induced chromatin relaxation, not direct PAR binding) to promote RNF168-dependent ubiquitin signaling and DSB repair, and to UV-damaged chromatin to facilitate transcription-coupled NER; it maintains nucleosome repeat length and CTCF-directed chromatin architecture continuously throughout the cell cycle; it forms complexes with multiple cofactors (ACF1/BAZ1A, BAZ2A, RSF-1, WSTF) and partners (DNMT3B, Cohesin, nucleolin, DMRT1) to fulfill context-specific roles in DNA replication, hematopoietic stem cell development and differentiation, T and B lymphocyte development, male meiosis and spermatogenesis, and transcriptional regulation, while its stability is maintained by USP3-mediated removal of K63-linked polyubiquitination.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"SMARCA5 (hSNF2H/hISWI) is the human homologue of Drosophila ISWI and the catalytic ATPase subunit of ISWI-family chromatin remodeling machinery that uses its conserved SWI2/SNF2 ATPase domain to reposition and space nucleosomes, thereby setting chromatin accessibility across the genome [#0, #15]. Acute degradation of SMARCA5 rapidly increases global nucleosome repeat length and compacts chromatin while leaving nascent transcription largely intact within hours, establishing nucleosome spacing as its primary, continuous activity throughout G1/S and S phase [#15]. A central output of this activity is CTCF-directed chromatin architecture: SMARCA5 co-localizes with CTCF and H2A.Z and is required for CTCF DNA binding and proper nucleosomal phasing around CTCF sites, and it associates with the Cohesin complex to support CTCF enhancer-blocking function [#15, #5]. SMARCA5 also operates in genome maintenance, being recruited to DNA double-strand breaks in a PARP1/poly(ADP-ribosyl)ation-dependent manner—through ADP-ribosylation-driven chromatin relaxation rather than direct PAR binding—where it promotes RNF168 accumulation and ubiquitin signaling for repair [#3, #17], and to UV-damaged chromatin via its functional ATPase, SLIDE, and HAND domains to facilitate CSB recruitment and transcription recovery during nucleotide excision repair [#4]. It functions within ISWI cofactor complexes (ACF1/BAZ1A, BAZ2A/TIP5, RSF-1) and partners with sequence-specific and chromatin factors including DNMT3B, nucleolin, CTCF, and DMRT1 to fulfill context-specific roles in remodeling-dependent gene regulation [#1, #22, #25, #9, #23]. Through these activities SMARCA5 is essential for definitive hematopoiesis and erythroid/myeloid maturation, T and B lymphocyte development and germinal center formation, male meiosis and spermatogenesis, and cell-cycle progression, with its loss frequently triggering p53 activation, senescence, and chromatid-segregation defects [#6, #7, #20, #22, #8, #14]. Its protein stability is maintained by USP3-mediated removal of K63-linked polyubiquitination [#16].\"\n,\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Established the molecular identity of SMARCA5 by cloning it as a human ISWI homologue, predicting a chromatin-remodeling ATPase before any function was tested.\",\n      \"evidence\": \"cDNA cloning, sequence homology, Northern blot and FISH mapping\",\n      \"pmids\": [\"9730600\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No functional reconstitution of remodeling activity\", \"No in vivo phenotype defined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Connected SMARCA5 to repressive epigenetic machinery, indicating it acts at heterochromatin in concert with DNA methylation and silencing factors.\",\n      \"evidence\": \"Co-IP, GST pull-down, immunofluorescence co-localization and ATPase assay in human cells\",\n      \"pmids\": [\"15120635\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Interactions from a single lab without reciprocal genome-wide validation\", \"Functional consequence of DNMT3B association not tested\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Defined SMARCA5 as a global regulator of chromatin structure in vivo, predominantly euchromatic with effects on histone modification and heterochromatin organization.\",\n      \"evidence\": \"Confocal immunostaining and heterozygous mouse model\",\n      \"pmids\": [\"19482671\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Heterozygous model gives partial loss-of-function only\", \"Direct nucleosome-level mechanism not assayed\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Placed SMARCA5 in the DNA double-strand break response, showing PARP1/PAR-dependent recruitment that drives RNF168 ubiquitin signaling and BRCA1 assembly.\",\n      \"evidence\": \"Reciprocal Co-IP, laser-damage live imaging, siRNA, IR sensitivity and PAR functional assays\",\n      \"pmids\": [\"23264744\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether remodeling ATPase activity is required for RNF168 promotion not dissected here\", \"Mechanism of PAR-dependent recruitment left to later work\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Extended SMARCA5's DNA-damage role to nucleotide excision repair, showing domain-dependent recruitment to UV lesions and a requirement for transcription recovery.\",\n      \"evidence\": \"Live imaging, domain-deletion mutagenesis, UV-C damage and transcription recovery assays\",\n      \"pmids\": [\"24990377\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Substrate nucleosome substrate at lesions not directly characterized\", \"Relative contributions of ACF1/WSTF complexes not separated\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Linked SMARCA5 to genome architecture by showing it facilitates CTCF binding and enhancer-blocking together with Cohesin, with a lineage-specific output at SPI1.\",\n      \"evidence\": \"ChIP, Co-IP and enhancer-blocking reporter assays in myeloid/AML cells\",\n      \"pmids\": [\"24498324\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs indirect facilitation of CTCF binding unresolved at this stage\", \"Genome-wide scope not yet established\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Demonstrated that SMARCA5 is essential for definitive hematopoiesis, with loss blocking erythroid/myeloid maturation and activating p53.\",\n      \"evidence\": \"Multiple conditional-Cre knockout mouse models, hematopoietic phenotyping, p53 modification Western blots\",\n      \"pmids\": [\"28276606\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether p53 activation is cause or consequence of the maturation block not fully resolved\", \"Direct chromatin targets in HSPCs not mapped\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showed SMARCA5 is required for lymphocyte development, with stage-specific blocks and only partial p53-dependence, distinguishing remodeling defects from p53-driven death.\",\n      \"evidence\": \"Conditional knockout, flow cytometry, expression profiling, p53 epistasis\",\n      \"pmids\": [\"31068388\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"p53-independent component of the developmental block mechanistically undefined\", \"Direct target loci at DN3/pro-B stages not identified\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Implicated SMARCA5 in mitotic fidelity and chromatid cohesion, beyond its interphase chromatin roles.\",\n      \"evidence\": \"CRISPR/Cas9 knockout in AML cell lines, cell cycle and cytogenetic analysis\",\n      \"pmids\": [\"32197313\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular basis of premature chromatid separation not defined\", \"Single lab, AML-cell-line specific\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Established SMARCA5 as a maintainer of chromatin accessibility at lineage-gene promoters, acting with nucleolin to license transcription-factor binding in hematopoiesis.\",\n      \"evidence\": \"ATAC-seq, RNA-seq, Co-IP (nucleolin) in zebrafish HSPCs\",\n      \"pmids\": [\"32756943\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct biochemical role of nucleolin in remodeling not reconstituted\", \"Single lab/model\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Generalized the accessibility-licensing model to differentiation programs, showing lncRNA-guided SMARCA5 opens myogenic loci and a developmental requirement in embryos.\",\n      \"evidence\": \"Co-IP (lncMREF), ATAC-seq, ChIP-seq in muscle satellite cells; siRNA depletion with RNA-seq in mouse/bovine embryos\",\n      \"pmids\": [\"36200826\", \"33899080\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How lncRNA guides SMARCA5 to specific loci unresolved\", \"Species differences in embryo requirement unexplained\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Provided a clean epistatic chain showing SMARCA5 controls a specific physiological program (RBC homeostasis) via accessibility at the keap1a promoter upstream of Keap1-Nrf2.\",\n      \"evidence\": \"Zebrafish mutant, ATAC-seq, RNA-seq, keap1a/hmox1a rescue experiments\",\n      \"pmids\": [\"34698638\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct binding of SMARCA5 at keap1a vs broader chromatin effects not distinguished\", \"Mammalian conservation of the axis not tested here\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Identified SMARCA5 as a functionally required partner of the NUP98-NSD1 oncofusion, showing its remodeling activity (not condensate assembly) drives leukemic transformation.\",\n      \"evidence\": \"AP-MS, inducible knockdown, pharmacological inhibition, PLA, FRAP, colony assays in patient cells\",\n      \"pmids\": [\"35073946\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Specific chromatin targets of the SMARCA5-NUP98-NSD1 module not mapped\", \"Mechanism linking remodeling to transformation incomplete\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Defined a dosage-dependent requirement for SMARCA5 in restraining senescence and supporting immortalization, telomere maintenance and DNA repair.\",\n      \"evidence\": \"Conditional single/double-allele deletion, senescence and genotoxic assays, transcriptome and accessibility profiling\",\n      \"pmids\": [\"35269430\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct mechanism of telomere maintenance not established\", \"Single lab\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Resolved the core nucleosome-spacing function with temporal precision, showing acute SMARCA5 loss compacts chromatin and abolishes CTCF binding before transcription changes accumulate.\",\n      \"evidence\": \"Degron degradation in three human cell lines, MNase-seq, nascent transcription, CTCF/H2A.Z ChIP-seq, ATAC-seq\",\n      \"pmids\": [\"36630954\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How CTCF directs SMARCA5 to specific sites not fully resolved here\", \"Downstream transcriptional consequences over longer timescales not profiled\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Clarified the DSB recruitment mechanism, showing ACF subunits accumulate independently and via ADP-ribosylation-driven chromatin relaxation rather than direct PAR binding.\",\n      \"evidence\": \"Live imaging of GFP-tagged subunits, ADP-ribose binding and chromatin relaxation assays\",\n      \"pmids\": [\"38170578\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Quantitative contribution of relaxation vs other signals not measured\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Identified a post-translational control point, USP3-mediated removal of K63 polyubiquitin, governing SMARCA5 stability and chemoresistance.\",\n      \"evidence\": \"Co-IP, K63-linkage-specific ubiquitination assays, knockdown/overexpression, docetaxel resistance in vitro and in vivo\",\n      \"pmids\": [\"39500888\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"E3 ligase generating the K63 chains not identified\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Demonstrated SMARCA5 is required for germinal center formation and B cell activation through transcriptional and accessibility remodeling.\",\n      \"evidence\": \"Conditional knockout, single-cell multiomics (scRNA + ATAC), ribosomal pull-down, immunization\",\n      \"pmids\": [\"39297882\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Specific enhancers/promoters mechanistically responsible not isolated\", \"Recruitment determinants in activated B cells unknown\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Extended SMARCA5's reach to cancer signaling and inflammation through phospho-regulated partner interactions and upstream m6A/ubiquitin control of its levels.\",\n      \"evidence\": \"Co-IP with PIM1 phospho-SND1 and reporter/xenograft assays (ESCC); DSS UC mouse model with m6A (ALKBH5) and RNF180 ubiquitination assays\",\n      \"pmids\": [\"39725102\", \"39060657\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether remodeling activity is required for these transcriptional outputs not separated\", \"Direct vs indirect roles in each disease context unresolved\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Established SMARCA5 as essential for male meiosis and spermatogenesis, restricting chromatin accessibility in germ cells to enable synapsis, DNA repair and transposon silencing.\",\n      \"evidence\": \"Germ-cell-specific conditional knockout, scRNA-seq, ATAC-seq, Co-IP with BAZ1A/BAZ2A and repair factors\",\n      \"pmids\": [\"40743397\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How accessibility restriction is targeted to repeats/promoters not mechanistically resolved\", \"Direct role in meiotic recombination machinery not biochemically defined\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Proposed a pioneer-factor partnership in which SMARCA5 is recruited by DMRT1 to license retinoic-acid-responsive enhancers for spermatogenic differentiation.\",\n      \"evidence\": \"Conditional knockout, DMRT1 ChIP-seq, ATAC-seq, Co-IP (preprint)\",\n      \"pmids\": [\"41282062\", \"40837621\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Preprint, not peer-reviewed\", \"Direct demonstration that SMARCA5 remodeling generates RA-receptor sites needed\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Implicated SMARCA5 in cerebellar neural precursor proliferation and SHH-medulloblastoma growth.\",\n      \"evidence\": \"CRISPR dropout screen, conditional knockout, SHH pathway and in vivo tumor assays\",\n      \"pmids\": [\"40681754\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanistic link between SMARCA5 remodeling and SHH pathway activation undefined\", \"Single lab\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How SMARCA5 is selectively targeted to specific genomic loci across its many contexts—and whether its ATPase remodeling activity is required for each transcriptional and disease output—remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model for site selection by CTCF, DMRT1, lncRNAs, and cofactor complexes\", \"Catalytic dependence not tested for many reported functions\", \"No high-resolution structural model of the remodeling reaction in the timeline\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140657\", \"supporting_discovery_ids\": [0, 4, 15]},\n      {\"term_id\": \"GO:0140096\", \"supporting_discovery_ids\": [4, 15]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [5, 17]},\n      {\"term_id\": \"GO:0042393\", \"supporting_discovery_ids\": [1, 2]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [2, 15]},\n      {\"term_id\": \"GO:0000228\", \"supporting_discovery_ids\": [2, 3]},\n      {\"term_id\": \"GO:0005730\", \"supporting_discovery_ids\": [2, 9]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [0, 15]},\n      {\"term_id\": \"R-HSA-73894\", \"supporting_discovery_ids\": [3, 4, 17]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [5, 9, 15]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [8, 14, 15]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [6, 7, 20, 22]}\n    ],\n    \"complexes\": [\"ACF (SMARCA5-BAZ1A/ACF1)\", \"RSF (SMARCA5-RSF1)\", \"BAZ2A/TIP5 complex\"],\n    \"partners\": [\"BAZ1A\", \"BAZ2A\", \"RSF1\", \"CTCF\", \"DNMT3B\", \"DMRT1\", \"RNF168\", \"USP3\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}