{"gene":"EBF2","run_date":"2026-06-09T23:54:42","timeline":{"discoveries":[{"year":2013,"finding":"EBF2 recruits PPARγ to brown adipose-specific binding sites to determine brown versus white adipocyte identity; the EBF DNA-binding motif is highly enriched within brown adipose-specific PPARγ binding sites identified by ChIP-seq, and expression of EBF2 in myoblasts or white preadipose cells reprograms cells to a brown fat fate.","method":"ChIP-seq, ectopic expression in myoblasts/white preadipose cells, Ebf2 knockout mice","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 / Strong — genome-wide ChIP-seq, genetic KO, ectopic expression in multiple cell types, replicated across models","pmids":["23499423"],"is_preprint":false},{"year":2017,"finding":"EBF2 physically interacts with the BAF chromatin remodeling complex (via BRG1) and recruits it to lineage-specific enhancers in brown adipocytes; EBF2 directly transcriptionally activates DPF3, a brown fat-selective BAF subunit, which in turn is required for chromatin accessibility at EBF2-bound enhancers and for brown fat gene programming.","method":"ChIP-seq, co-immunoprecipitation (EBF2–BRG1 interaction), DPF3 loss-of-function (ATAC-seq/chromatin accessibility), direct promoter activation assays","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — reciprocal Co-IP, ChIP-seq, chromatin accessibility assays, genetic KO phenotype, multiple orthogonal methods in one study","pmids":["28428261"],"is_preprint":false},{"year":2021,"finding":"ZFP423 physically interacts with EBF2 and recruits the NuRD corepressor complex to EBF2-bound thermogenic gene enhancers in white adipocytes; disruption of the ZFP423–EBF2 protein–protein interaction via CRISPR-Cas9 editing triggers an EBF2 NuRD-to-BAF coregulator switch, shifts PPARγ occupancy toward thermogenic genes, and induces widespread browning of WAT.","method":"Co-IP, CRISPR-Cas9 disruption of protein–protein interaction, ChIP-seq (PPARγ occupancy), Zfp423 conditional KO","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal Co-IP, CRISPR editing, ChIP-seq occupancy data, genetic KO with defined phenotype, multiple orthogonal methods","pmids":["34620682"],"is_preprint":false},{"year":2005,"finding":"EBF2 binds to sequences in the Opg (osteoprotegerin) promoter and transactivates it in synergy with the Wnt-responsive LEF1/TCF:β-catenin pathway; loss of Ebf2 in mice causes downregulation of OPG, leading to increased osteoclast numbers and reduced bone mass.","method":"Promoter binding/transactivation assays, Ebf2 targeted knockout mice, osteoclast phenotype analysis","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 2 / Moderate — direct promoter binding and transactivation, genetic KO with defined phenotypic readout, two orthogonal methods (binding + KO phenotype)","pmids":["16326388"],"is_preprint":false},{"year":2006,"finding":"EBF1 and EBF2 promote adipogenesis by directly activating the PPARγ1 and C/EBPα promoters; EBF1 is itself induced by C/EBPβ/δ; knockdown of Ebf1/Ebf2 by shRNA blocks 3T3-L1 differentiation, placing EBF proteins within the core adipogenic transcriptional cascade.","method":"Promoter activation assays (direct binding), shRNA knockdown in 3T3-L1 cells, ectopic expression in NIH 3T3 fibroblasts","journal":"Molecular and cellular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct promoter binding, loss-of-function shRNA with phenotypic readout, single lab","pmids":["17060461"],"is_preprint":false},{"year":2003,"finding":"Loss of Ebf2 in mice causes defective migration of GnRH-synthesizing neurons, impaired formation of the neuroendocrine axis, and hypogonadotropic hypogonadism; Ebf2-null peripheral nerves show axon-sorting defects, hypomyelination, and severely reduced motor nerve conduction velocity, establishing EBF2 as required for GnRH neuron migration and peripheral nerve development.","method":"Targeted Ebf2 gene deletion in mice, histological/neuroanatomical analysis, electrophysiology (motor nerve conduction velocity)","journal":"Development (Cambridge, England)","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO with multiple distinct phenotypic readouts (neuroendocrine axis, peripheral nerve electrophysiology), well-characterized model","pmids":["12466206"],"is_preprint":false},{"year":2014,"finding":"Ebf2 marks and regulates embryonic brown adipogenic precursor cells; Ebf2-expressing cells from brown fat tissue uniformly differentiate into brown adipocytes, those from white fat into beige adipocytes; loss of Ebf2 reduces brown preadipose-signature genes while ectopic Ebf2 expression in myoblasts activates brown preadipose-specific genes.","method":"Ebf2-GFP reporter mouse, prospective cell isolation, RNA-seq, loss-of-function (Ebf2 KO), ectopic expression in myoblasts","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 2 / Strong — prospective cell isolation, genetic KO, ectopic expression, RNA-seq, multiple orthogonal approaches","pmids":["25197048"],"is_preprint":false},{"year":2015,"finding":"EBF2 is required for beige adipocyte development; Ebf2 knockout mice fail to induce UCP1 or a thermogenic program in subcutaneous WAT following adrenergic stimulation, and EBF2 overexpression in adipocyte cultures or transgenic adipose tissue is sufficient to induce UCP1 expression, brown-like differentiation, and increased mitochondrial function.","method":"Ebf2 KO mice, transgenic Ebf2 overexpression in adipose tissue, primary adipose cell cultures, adrenergic stimulation, UCP1 and mitochondrial function assays","journal":"Molecular metabolism","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO and transgenic OE in vivo, primary cell culture assays, multiple orthogonal readouts","pmids":["26844207"],"is_preprint":false},{"year":2009,"finding":"EBF2 functions as a transcriptional activator of OPG in osteosarcoma; knockdown of EBF2 reduces OPG levels and increases sensitivity to TRAIL-induced apoptosis, demonstrating that EBF2-driven OPG expression contributes to TRAIL resistance in osteosarcoma.","method":"Lentiviral shRNA knockdown of EBF2, real-time PCR, ELISA (OPG protein), caspase-3/7 apoptosis assay","journal":"Clinical cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function with defined downstream molecular and functional readouts (OPG levels and TRAIL apoptosis sensitivity), single lab","pmids":["19671856"],"is_preprint":false},{"year":2011,"finding":"Ebf2 is expressed in Schwann cells; loss of Ebf2 delays the onset of myelination, downregulates Schwann cell differentiation markers, causes nodal region abnormalities, shorter internodal length, and impairs motor nerve conduction velocity and amplitude, establishing EBF2 as required for peripheral nerve myelination and Schwann cell differentiation.","method":"Ebf2 KO mice, immunohistochemistry, electrophysiology (nerve conduction), morphometric analysis","journal":"Neurobiology of disease","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic KO with multiple independent phenotypic readouts (histology, electrophysiology, axonal caliber), replicated across developmental timepoints","pmids":["21220016"],"is_preprint":false},{"year":2016,"finding":"EBF1 and EBF2 act as positive regulators of myelination in Schwann cells; combined knockdown of Ebf genes in myelinating dorsal root ganglia cultures severely impairs myelin formation, rescued by specific overexpression; EBF target gene profiling identifies Gliomedin as a direct target regulated by EBF factors in peripheral myelination.","method":"siRNA/shRNA knockdown and overexpression in DRG myelinating cultures, EBF target gene profiling, promoter regulation assays for Gliomedin","journal":"Molecular neurobiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — loss-of-function with rescue, target gene identification, single lab","pmids":["27889898"],"is_preprint":false},{"year":2012,"finding":"Loss of Ebf2 causes a transient decrease in Cajal-Retzius cell numbers on the cortical surface due to a migratory defect originating from the cortical hem; both EBF2 and EBF3 directly control CR cell migration in vitro.","method":"Ebf2 KO mice, fate-mapping studies, in vitro cortical hem preparations with migration assays","journal":"Developmental biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with in vivo and in vitro migration assays, multiple methods, single lab","pmids":["22421355"],"is_preprint":false},{"year":2011,"finding":"Ebf2 overexpression increases the generation of early-born neurons including Cajal-Retzius cells, while Ebf2 knockdown decreases it, demonstrating a direct regulatory role for EBF2 in cortical neurogenesis and CR neuron generation without affecting other layer-specific neurons.","method":"Lentiviral-mediated knockdown and overexpression in cortical cultures, Ebf2-EGFP transgenic reporter line","journal":"Developmental neuroscience","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — KD/OE with defined neuronal phenotype, single lab, single platform","pmids":["22042145"],"is_preprint":false},{"year":2015,"finding":"Loss of Ebf2 in vivo causes a marked reduction in dopaminergic neuron number specifically in the midbrain periaqueductal gray matter but not in the substantia nigra or ventral tegmental area, demonstrating a selective requirement for EBF2 in PAG DA neuron development.","method":"Ebf2 KO mice, immunohistochemistry, quantification of TH+ neurons across midbrain subregions","journal":"Developmental neurobiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO with region-specific phenotypic readout, single lab","pmids":["25762221"],"is_preprint":false},{"year":2023,"finding":"EBF2 binds H3K4me1 (monomethylated histone H3 Lys4) and cooperates with KMT2D (which catalyzes H3K4me1) at the KLLN gene promoter region to activate KLLN transcription; KMT2D and EBF2 cooperatively suppress PDAC cell proliferation, migration, and invasion through KLLN upregulation.","method":"ChIP-seq, RNA-seq, co-occupancy analysis, functional assays (proliferation, migration, invasion), EBF2 identified as H3K4me1-binding protein","journal":"Advanced science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP-seq identifying EBF2 as H3K4me1 reader, functional KD assays, single lab","pmids":["38015024"],"is_preprint":false},{"year":2024,"finding":"SOX4 activates EBF2 transcription by directly binding its promoter; SOX4 and EBF2 cooperate to activate thermogenic gene expression in brown adipose tissue; phosphorylation of SOX4 at Ser235 by PKA promotes its nuclear translocation and thereby enhances EBF2 transcription.","method":"Sox4 conditional KO mice, SOX4 overexpression in BAT, ChIP assays (SOX4 binding to EBF2 promoter), co-immunoprecipitation (SOX4–EBF2 complex), PKA phosphorylation assays","journal":"Cell death and differentiation","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ChIP, genetic KO with thermogenic phenotype, single lab","pmids":["39402212"],"is_preprint":false},{"year":2025,"finding":"The deubiquitinating enzyme USP2 physically interacts with EBF2 and stabilizes it by removing ubiquitin, thereby preventing EBF2 degradation; BAT-specific Usp2 knockdown impairs thermogenic programs, while Usp2 overexpression in BAT protects against obesity; EBF2 was identified as the substrate of USP2 mediating its thermogenic function.","method":"Co-immunoprecipitation, quantitative proteomics (substrate identification), adeno-associated virus and lentivirus KD/OE in vivo and in vitro, metabolic phenotyping","journal":"Molecular metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, proteome-wide substrate identification, genetic KD/OE with metabolic phenotype, single lab","pmids":["40189098"],"is_preprint":false},{"year":2025,"finding":"EBF2 directly regulates mitochondrial membrane phospholipid composition in brown adipocytes; Myf5Cre-driven Ebf2 deletion drastically reduces cardiolipin and phosphatidylethanolamine abundance and alters acyl chain remodeling; EBF2 directly binds the Srebf1 promoter and regulates expression of cardiolipin/PE-synthesizing genes; Ebf2 deletion reduces DRP1 and OPA1 levels, impairing mitochondrial fission-fusion dynamics.","method":"Myf5Cre conditional Ebf2 KO mice, lipidomics, ChIP (EBF2 binding to Srebf1), gene expression analysis, electron microscopy","journal":"Journal of lipid research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO, direct ChIP binding, lipidomics, multiple orthogonal methods, single lab","pmids":["40865612"],"is_preprint":false},{"year":2026,"finding":"Cars2-generated cysteine persulfide post-translationally modifies EBF2 via persulfidation; persulfidated EBF2 shows enhanced interaction with PPARγ and BRG1, increasing recruitment of the EBF2–PPARγ complex to browning gene promoters to drive brown fat development and thermogenesis; Cars2 is itself a direct transcriptional target of EBF2.","method":"Co-IP (EBF2–PPARγ and EBF2–BRG1 interactions after persulfidation), ChIP (EBF2-PPARγ complex at browning gene promoters), Cars2 KO in thermogenic fat, H2S donor treatment, EBF2 persulfidation biochemical assays","journal":"Advanced science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ChIP, genetic KO, biochemical persulfidation assays, single lab","pmids":["41849685"],"is_preprint":false},{"year":2026,"finding":"EBF2 contains a low-complexity C-terminal domain (CTD) that drives biomolecular condensate (phase separation) formation; deletion of the CTD or mutation of conserved proline residues disrupts EBF2 phase separation without affecting genomic occupancy; EBF2 condensates sequester the transcriptional repressor ZFP423 and exclude HDAC1, creating a permissive chromatin environment for thermogenic gene expression; fusion of an IDR from FUS but not MED1 rescues condensate function.","method":"EBF2 ΔCTD/proline mutants in vitro and in male mice, live-cell condensate imaging, co-immunoprecipitation (ZFP423/HDAC1 in condensates), ChIP, small-molecule condensate screen","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — domain deletion mutagenesis, condensate imaging, Co-IP, ChIP, in vivo mouse model, single lab","pmids":["42026085"],"is_preprint":false},{"year":2026,"finding":"A heterozygous nonsense EBF2 variant (p.E165X) impairs adipocyte differentiation and adipose tissue remodeling in vitro and in Ebf2E165X/+ knock-in mice; the variant causes excess accumulation of undifferentiated CD34+ cells, defective extracellular matrix remodeling, abnormal adipocyte hypertrophy, reduced adiponectin/leptin expression, glucose intolerance, and downregulation of mitochondrial fatty acid metabolism genes specifically in adipose tissue.","method":"Heterozygous knock-in (Ebf2E165X/+) mice, in vitro adipogenesis assays, gene expression analysis, metabolic phenotyping, histology","journal":"The Journal of clinical investigation","confidence":"High","confidence_rationale":"Tier 2 / Strong — patient variant modeled in knock-in mice and in vitro, multiple orthogonal readouts (cell differentiation, ECM, metabolic phenotype), peer-reviewed","pmids":["41615236"],"is_preprint":false},{"year":2024,"finding":"EBF2 interacts with transcriptional co-activators CBP/P300 to induce H3K27ac deposition and chromatin activation at brown adipose tissue-associated genes, driving progressive specification of the brown fat lineage from Pax7+ mesodermal stem cells; EBF2 expression during a critical embryonic window (E10.5–E14.5 in mouse) is required for BAT lineage specification.","method":"ChIP-seq (H3K4me3, H3K27me3, H3K27ac dynamics), Co-IP (EBF2–CBP/P300 interaction), comparative mouse/pig analysis, ectopic EBF2 expression in mesodermal stem cells","journal":"Journal of advanced research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ChIP-seq, ectopic expression, comparative species analysis, single lab","pmids":["39736442"],"is_preprint":false},{"year":2025,"finding":"SOX4 forms two independent complexes with EBF2 and with PPARγ to promote thermogenic gene expression in BAT; SOX4 directly binds the promoter regions of thermogenic genes independent of EBF2; deletion of SOX4 in BAT (Sox4-BKO mice) downregulates thermogenic and oxidative phosphorylation genes and reduces mitochondrial numbers.","method":"Co-immunoprecipitation (SOX4–EBF2 and SOX4–PPARγ complexes), ChIP (SOX4 direct binding to thermogenic gene promoters), Sox4 conditional KO (Ucp1Cre+), in vitro loss-of-function","journal":"Advanced biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP, ChIP, genetic KO with phenotypic readout, single lab","pmids":["40977422"],"is_preprint":false},{"year":2018,"finding":"miR-204-5p directly binds the 3' UTR of EBF2 mRNA to regulate its stability; overexpression of EBF2 inhibits apoptosis and promotes migration and invasion of osteosarcoma cells, and EBF2 overexpression rescues the pro-apoptotic/anti-migratory phenotype caused by miR-204-5p overexpression.","method":"Luciferase reporter assay (miR-204-5p binding to EBF2 3'UTR), EBF2 overexpression rescue experiments, apoptosis assays, migration/invasion assays, xenograft model","journal":"Biochimie","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — luciferase 3'UTR assay, rescue experiment, in vivo xenograft, single lab","pmids":["30529043"],"is_preprint":false}],"current_model":"EBF2 is a helix-loop-helix transcription factor that determines brown/beige adipocyte identity by recruiting PPARγ to brown-selective enhancers, physically interacting with the BAF chromatin remodeling complex (via BRG1) and DPF3 to remodel chromatin, and forming phase-separated condensates that sequester the repressor ZFP423 while excluding HDAC1; it is stabilized by the deubiquitinase USP2 and activated post-translationally by Cars2-mediated persulfidation (which enhances its interaction with PPARγ and BRG1); upstream, SOX4 (activated by PKA phosphorylation) directly transcribes EBF2, while ZFP423 antagonizes EBF2 by recruiting the NuRD corepressor to EBF2-bound enhancers; beyond fat, EBF2 activates OPG transcription in osteoblast progenitors to regulate osteoclast differentiation via RANK-RANKL signaling, and is required for GnRH neuron migration, peripheral nerve myelination (in part through direct regulation of the Gliomedin promoter), Cajal-Retzius cell migration from the cortical hem, and midbrain PAG dopaminergic neuron development."},"narrative":{"mechanistic_narrative":"EBF2 is a sequence-specific helix-loop-helix transcription factor that acts as a master determinant of brown and beige adipocyte identity, marking embryonic brown adipogenic precursors and reprogramming myoblasts or white preadipocytes toward a thermogenic fate [PMID:23499423, PMID:25197048, PMID:26844207]. Mechanistically, EBF2 recruits PPARγ to brown-fat-selective enhancers and physically engages the BAF chromatin-remodeling complex through BRG1, while transcriptionally activating the brown-selective BAF subunit DPF3 to open chromatin at its target enhancers [PMID:23499423, PMID:28428261]; it also cooperates with CBP/P300 to deposit H3K27ac during a defined embryonic window of BAT lineage specification and itself reads the H3K4me1 mark [PMID:39736442, PMID:38015024]. EBF2 nucleates phase-separated condensates via a low-complexity C-terminal domain that sequester the repressor ZFP423 and exclude HDAC1 to create a permissive thermogenic chromatin environment, counteracting the antagonistic ZFP423–NuRD corepressor module that otherwise restrains EBF2-bound enhancers in white fat [PMID:42026085, PMID:34620682]. Its activity is tuned post-translationally—stabilized against degradation by the deubiquitinase USP2 and activated by Cars2-dependent persulfidation that strengthens its interaction with PPARγ and BRG1—and upstream by SOX4, which is induced by PKA and directly transcribes EBF2 [PMID:40189098, PMID:41849685, PMID:39402212]. Beyond adipose tissue, EBF2 directly transactivates the osteoprotegerin (Opg) promoter to regulate osteoclast differentiation and bone mass [PMID:16326388], and is required for GnRH neuron migration, peripheral nerve myelination and Schwann cell differentiation, Cajal-Retzius cell migration, and midbrain PAG dopaminergic neuron development [PMID:12466206, PMID:21220016, PMID:22421355, PMID:25762221]. A heterozygous nonsense EBF2 variant (p.E165X) impairs adipocyte differentiation and adipose remodeling and causes glucose intolerance in knock-in mice, linking EBF2 dysfunction to metabolic disease [PMID:41615236].","teleology":[{"year":2003,"claim":"Established the first in vivo requirements for EBF2, showing it is essential for neuroendocrine and peripheral nervous system development before any role in fat was known.","evidence":"Targeted Ebf2 deletion in mice with neuroanatomy and nerve electrophysiology","pmids":["12466206"],"confidence":"High","gaps":["Direct transcriptional targets in GnRH neurons and nerve not identified","Cell-autonomous vs non-autonomous mechanism unresolved"]},{"year":2005,"claim":"Identified the first direct EBF2 target gene, Opg, defining a transcriptional mechanism linking EBF2 to bone homeostasis via osteoclast control.","evidence":"Promoter binding/transactivation assays and Ebf2 KO mice with bone phenotype","pmids":["16326388"],"confidence":"High","gaps":["Cofactors at the Opg promoter beyond LEF1/TCF not fully defined","Direct vs indirect contribution to bone mass not dissected"]},{"year":2006,"claim":"Placed EBF proteins within the core adipogenic cascade by showing they directly activate PPARγ1 and C/EBPα, before brown-specific roles were known.","evidence":"Promoter activation assays and shRNA knockdown in 3T3-L1 cells","pmids":["17060461"],"confidence":"Medium","gaps":["EBF1 vs EBF2 specific contributions not separated","Single lab"]},{"year":2013,"claim":"Revealed the defining function of EBF2 as a brown-fat determinant that recruits PPARγ to brown-selective enhancers, explaining how a shared adipogenic factor specifies lineage identity.","evidence":"ChIP-seq, ectopic expression in myoblasts/white preadipocytes, Ebf2 KO mice","pmids":["23499423"],"confidence":"High","gaps":["Chromatin-remodeling machinery not yet identified","How brown-specific enhancer selection is achieved unresolved"]},{"year":2014,"claim":"Defined EBF2 as a prospective marker and regulator of embryonic brown adipogenic precursors, distinguishing brown vs beige fates by cellular origin.","evidence":"Ebf2-GFP reporter mice, prospective cell isolation, RNA-seq, KO and ectopic expression","pmids":["25197048"],"confidence":"High","gaps":["Molecular basis of brown vs beige fate divergence not defined"]},{"year":2015,"claim":"Extended EBF2's requirement to inducible beige fat, showing it is necessary and sufficient for the adrenergically driven thermogenic program in WAT.","evidence":"Ebf2 KO and adipose-transgenic OE mice, primary cultures, UCP1/mitochondrial assays","pmids":["26844207"],"confidence":"High","gaps":["Connection between adrenergic signaling and EBF2 activity not mechanistically traced"]},{"year":2017,"claim":"Provided the chromatin-remodeling mechanism for EBF2 function, showing it recruits BAF via BRG1 and activates the brown-selective subunit DPF3 to open its target enhancers.","evidence":"Reciprocal Co-IP, ChIP-seq, ATAC-seq with DPF3 loss-of-function, promoter assays","pmids":["28428261"],"confidence":"High","gaps":["Structural basis of EBF2–BRG1 interaction unknown","How DPF3 enforces brown selectivity not resolved"]},{"year":2021,"claim":"Defined the molecular antagonism restraining EBF2 in white fat, showing ZFP423 recruits NuRD to EBF2 enhancers and that breaking this interaction triggers a corepressor-to-coactivator switch and browning.","evidence":"Co-IP, CRISPR disruption of the PPI, PPARγ ChIP-seq, Zfp423 conditional KO","pmids":["34620682"],"confidence":"High","gaps":["Signals controlling the ZFP423–EBF2 interaction in vivo not identified"]},{"year":2024,"claim":"Identified upstream transcriptional and signaling control of EBF2 by SOX4, linking PKA signaling to EBF2 induction and thermogenesis.","evidence":"Sox4 conditional KO and OE, ChIP at the EBF2 promoter, Co-IP, PKA phosphorylation assays","pmids":["39402212","40977422"],"confidence":"Medium","gaps":["Whether SOX4 and EBF2 functions are separable in vivo not fully resolved","Single lab"]},{"year":2024,"claim":"Showed EBF2 reads H3K4me1 and cooperates with KMT2D to activate KLLN, extending EBF2's coactivator partnerships and revealing a tumor-suppressive role in PDAC.","evidence":"ChIP-seq, RNA-seq, co-occupancy, functional proliferation/invasion assays","pmids":["38015024"],"confidence":"Medium","gaps":["Generality of H3K4me1 reading across EBF2 target loci untested","Single lab"]},{"year":2024,"claim":"Connected EBF2 to histone acetylation by showing it recruits CBP/P300 to deposit H3K27ac during a critical embryonic window of BAT specification.","evidence":"ChIP-seq histone mark dynamics, Co-IP, ectopic expression, comparative species analysis","pmids":["39736442"],"confidence":"Medium","gaps":["Temporal coordination with BAF/DPF3 remodeling not integrated","Single lab"]},{"year":2025,"claim":"Revealed post-translational stabilization of EBF2 by the deubiquitinase USP2 as a control point for thermogenic capacity and obesity resistance.","evidence":"Co-IP, proteome-wide substrate ID, AAV/lentiviral KD/OE in vivo, metabolic phenotyping","pmids":["40189098"],"confidence":"Medium","gaps":["E3 ligase opposing USP2 not identified","Single lab"]},{"year":2025,"claim":"Linked EBF2 directly to mitochondrial phospholipid biology, showing it binds Srebf1 and controls cardiolipin/PE synthesis and fission-fusion machinery in brown adipocytes.","evidence":"Myf5Cre Ebf2 KO, lipidomics, ChIP at Srebf1, electron microscopy","pmids":["40865612"],"confidence":"Medium","gaps":["Whether mitochondrial defects are direct or secondary to lost identity unclear","Single lab"]},{"year":2026,"claim":"Demonstrated that EBF2 forms phase-separated condensates that sequester ZFP423 and exclude HDAC1, providing a biophysical mechanism for creating a permissive thermogenic chromatin environment.","evidence":"ΔCTD/proline mutants in vitro and in mice, live-cell imaging, Co-IP, ChIP, IDR swaps","pmids":["42026085"],"confidence":"Medium","gaps":["Endogenous condensate dynamics in vivo not fully quantified","Single lab"]},{"year":2026,"claim":"Identified Cars2-mediated persulfidation as a post-translational activation switch enhancing EBF2 interaction with PPARγ and BRG1, with EBF2 also transcribing Cars2 in a feedforward loop.","evidence":"Co-IP after persulfidation, ChIP, Cars2 KO, H2S donor and persulfidation biochemistry","pmids":["41849685"],"confidence":"Medium","gaps":["Persulfidated residues on EBF2 not mapped","Single lab"]},{"year":2026,"claim":"Established a disease link by showing a heterozygous EBF2 nonsense variant impairs adipose differentiation and remodeling and causes metabolic dysfunction.","evidence":"Ebf2E165X/+ knock-in mice, in vitro adipogenesis, metabolic phenotyping, histology","pmids":["41615236"],"confidence":"High","gaps":["Human patient genetics beyond the modeled variant not detailed","Mechanism of dominant effect not fully dissected"]},{"year":null,"claim":"How EBF2's many post-translational, condensate, and cofactor inputs are integrated to achieve tissue-specific target selection, and how its neuronal/skeletal roles relate mechanistically to its adipose function, remain open.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of EBF2–PPARγ or EBF2–BRG1 complexes","Direct targets in neurons largely unidentified","Integration of persulfidation, ubiquitination, and condensate formation not unified"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,1,3,4,6,7]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[0,3,17]},{"term_id":"GO:0042393","term_label":"histone binding","supporting_discovery_ids":[14]},{"term_id":"GO:0140313","term_label":"molecular sequestering activity","supporting_discovery_ids":[19]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[1,2,19]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[0,1,3]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[1,19,21]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[5,6,9,11]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[7,17,20]}],"complexes":["BAF chromatin remodeling complex"],"partners":["PPARG","BRG1","DPF3","ZFP423","SOX4","USP2","CBP/P300","HDAC1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9HAK2","full_name":"Transcription factor COE2","aliases":["Early B-cell factor 2","EBF-2"],"length_aa":575,"mass_kda":62.6,"function":"Transcription factor that, in osteoblasts, activates the decoy receptor for RANKL, TNFRSF11B, which in turn regulates osteoclast differentiation. Acts in synergy with the Wnt-responsive LEF1/CTNNB1 pathway. Recognizes variations of the palindromic sequence 5'-ATTCCCNNGGGAATT-3' (By similarity)","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q9HAK2/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/EBF2","classification":"Not Classified","n_dependent_lines":1,"n_total_lines":1208,"dependency_fraction":0.0008278145695364238},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/EBF2","total_profiled":1310},"omim":[{"mim_id":"617256","title":"SOLUTE CARRIER FAMILY 7, MEMBER 13; SLC7A13","url":"https://www.omim.org/entry/617256"},{"mim_id":"609935","title":"EARLY B-CELL FACTOR 4; EBF4","url":"https://www.omim.org/entry/609935"},{"mim_id":"609934","title":"EARLY B-CELL FACTOR 2; EBF2","url":"https://www.omim.org/entry/609934"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"},{"location":"Nuclear bodies","reliability":"Additional"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"adipose 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in EBF2 was segregated with imperforate anus in a family across three generations.","date":"2018","source":"American journal of medical genetics. Part A","url":"https://pubmed.ncbi.nlm.nih.gov/29704291","citation_count":3,"is_preprint":false},{"pmid":"40977422","id":"PMC_40977422","title":"SOX4 Regulates Thermogenesis in Brown Adipose Tissue via Independent Complexes with EBF2 and PPARγ.","date":"2025","source":"Advanced biology","url":"https://pubmed.ncbi.nlm.nih.gov/40977422","citation_count":2,"is_preprint":false},{"pmid":"40189098","id":"PMC_40189098","title":"Deubiquitinating enzyme USP2 regulates brown adipose tissue thermogenesis via controlling EBF2 stabilization.","date":"2025","source":"Molecular metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/40189098","citation_count":1,"is_preprint":false},{"pmid":"40865612","id":"PMC_40865612","title":"EBF2 regulates cardiolipin and phosphatidylethanolamine remodeling and mitochondrial dynamics in brown fat.","date":"2025","source":"Journal of lipid research","url":"https://pubmed.ncbi.nlm.nih.gov/40865612","citation_count":0,"is_preprint":false},{"pmid":"41615236","id":"PMC_41615236","title":"EBF2 variant identified in a patient with atypical partial lipodystrophy causes adipose fibrosis and dysfunction.","date":"2026","source":"The Journal of clinical investigation","url":"https://pubmed.ncbi.nlm.nih.gov/41615236","citation_count":0,"is_preprint":false},{"pmid":"41859334","id":"PMC_41859334","title":"Postnatal expression of the transcription factor Ebf2 in motivation, reward, and pain-related circuits of the mouse brain.","date":"2026","source":"Frontiers in neuroanatomy","url":"https://pubmed.ncbi.nlm.nih.gov/41859334","citation_count":0,"is_preprint":false},{"pmid":"42026085","id":"PMC_42026085","title":"EBF2 condensates enable adipose thermogenesis through ZFP423 sequestration and epigenetic remodeling.","date":"2026","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/42026085","citation_count":0,"is_preprint":false},{"pmid":"41849685","id":"PMC_41849685","title":"Cars2-Mediated Cysteine Catabolism Drives Brown Fat Development and Thermogenesis Through Persulfidating EBF2.","date":"2026","source":"Advanced science (Weinheim, Baden-Wurttemberg, Germany)","url":"https://pubmed.ncbi.nlm.nih.gov/41849685","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.11.04.686561","title":"Brown Adipose Tissue Dysfunction Links Obesogen Exposure to Reduced Energy Expenditure and Transgenerational Obesity","date":"2025-11-05","source":"bioRxiv","url":"https://doi.org/10.1101/2025.11.04.686561","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.06.24.24309093","title":"Early B-cell transcription factor-2 defect as a novel cause of lipodystrophy: disruption of the adipose tissue character and integrity","date":"2024-06-24","source":"bioRxiv","url":"https://doi.org/10.1101/2024.06.24.24309093","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":20812,"output_tokens":6315,"usd":0.07858,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":15176,"output_tokens":4780,"usd":0.09769,"stage2_stop_reason":"end_turn"},"total_usd":0.17627,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2013,\n      \"finding\": \"EBF2 recruits PPARγ to brown adipose-specific binding sites to determine brown versus white adipocyte identity; the EBF DNA-binding motif is highly enriched within brown adipose-specific PPARγ binding sites identified by ChIP-seq, and expression of EBF2 in myoblasts or white preadipose cells reprograms cells to a brown fat fate.\",\n      \"method\": \"ChIP-seq, ectopic expression in myoblasts/white preadipose cells, Ebf2 knockout mice\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genome-wide ChIP-seq, genetic KO, ectopic expression in multiple cell types, replicated across models\",\n      \"pmids\": [\"23499423\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"EBF2 physically interacts with the BAF chromatin remodeling complex (via BRG1) and recruits it to lineage-specific enhancers in brown adipocytes; EBF2 directly transcriptionally activates DPF3, a brown fat-selective BAF subunit, which in turn is required for chromatin accessibility at EBF2-bound enhancers and for brown fat gene programming.\",\n      \"method\": \"ChIP-seq, co-immunoprecipitation (EBF2–BRG1 interaction), DPF3 loss-of-function (ATAC-seq/chromatin accessibility), direct promoter activation assays\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — reciprocal Co-IP, ChIP-seq, chromatin accessibility assays, genetic KO phenotype, multiple orthogonal methods in one study\",\n      \"pmids\": [\"28428261\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"ZFP423 physically interacts with EBF2 and recruits the NuRD corepressor complex to EBF2-bound thermogenic gene enhancers in white adipocytes; disruption of the ZFP423–EBF2 protein–protein interaction via CRISPR-Cas9 editing triggers an EBF2 NuRD-to-BAF coregulator switch, shifts PPARγ occupancy toward thermogenic genes, and induces widespread browning of WAT.\",\n      \"method\": \"Co-IP, CRISPR-Cas9 disruption of protein–protein interaction, ChIP-seq (PPARγ occupancy), Zfp423 conditional KO\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal Co-IP, CRISPR editing, ChIP-seq occupancy data, genetic KO with defined phenotype, multiple orthogonal methods\",\n      \"pmids\": [\"34620682\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"EBF2 binds to sequences in the Opg (osteoprotegerin) promoter and transactivates it in synergy with the Wnt-responsive LEF1/TCF:β-catenin pathway; loss of Ebf2 in mice causes downregulation of OPG, leading to increased osteoclast numbers and reduced bone mass.\",\n      \"method\": \"Promoter binding/transactivation assays, Ebf2 targeted knockout mice, osteoclast phenotype analysis\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct promoter binding and transactivation, genetic KO with defined phenotypic readout, two orthogonal methods (binding + KO phenotype)\",\n      \"pmids\": [\"16326388\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"EBF1 and EBF2 promote adipogenesis by directly activating the PPARγ1 and C/EBPα promoters; EBF1 is itself induced by C/EBPβ/δ; knockdown of Ebf1/Ebf2 by shRNA blocks 3T3-L1 differentiation, placing EBF proteins within the core adipogenic transcriptional cascade.\",\n      \"method\": \"Promoter activation assays (direct binding), shRNA knockdown in 3T3-L1 cells, ectopic expression in NIH 3T3 fibroblasts\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct promoter binding, loss-of-function shRNA with phenotypic readout, single lab\",\n      \"pmids\": [\"17060461\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Loss of Ebf2 in mice causes defective migration of GnRH-synthesizing neurons, impaired formation of the neuroendocrine axis, and hypogonadotropic hypogonadism; Ebf2-null peripheral nerves show axon-sorting defects, hypomyelination, and severely reduced motor nerve conduction velocity, establishing EBF2 as required for GnRH neuron migration and peripheral nerve development.\",\n      \"method\": \"Targeted Ebf2 gene deletion in mice, histological/neuroanatomical analysis, electrophysiology (motor nerve conduction velocity)\",\n      \"journal\": \"Development (Cambridge, England)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO with multiple distinct phenotypic readouts (neuroendocrine axis, peripheral nerve electrophysiology), well-characterized model\",\n      \"pmids\": [\"12466206\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Ebf2 marks and regulates embryonic brown adipogenic precursor cells; Ebf2-expressing cells from brown fat tissue uniformly differentiate into brown adipocytes, those from white fat into beige adipocytes; loss of Ebf2 reduces brown preadipose-signature genes while ectopic Ebf2 expression in myoblasts activates brown preadipose-specific genes.\",\n      \"method\": \"Ebf2-GFP reporter mouse, prospective cell isolation, RNA-seq, loss-of-function (Ebf2 KO), ectopic expression in myoblasts\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — prospective cell isolation, genetic KO, ectopic expression, RNA-seq, multiple orthogonal approaches\",\n      \"pmids\": [\"25197048\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"EBF2 is required for beige adipocyte development; Ebf2 knockout mice fail to induce UCP1 or a thermogenic program in subcutaneous WAT following adrenergic stimulation, and EBF2 overexpression in adipocyte cultures or transgenic adipose tissue is sufficient to induce UCP1 expression, brown-like differentiation, and increased mitochondrial function.\",\n      \"method\": \"Ebf2 KO mice, transgenic Ebf2 overexpression in adipose tissue, primary adipose cell cultures, adrenergic stimulation, UCP1 and mitochondrial function assays\",\n      \"journal\": \"Molecular metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO and transgenic OE in vivo, primary cell culture assays, multiple orthogonal readouts\",\n      \"pmids\": [\"26844207\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"EBF2 functions as a transcriptional activator of OPG in osteosarcoma; knockdown of EBF2 reduces OPG levels and increases sensitivity to TRAIL-induced apoptosis, demonstrating that EBF2-driven OPG expression contributes to TRAIL resistance in osteosarcoma.\",\n      \"method\": \"Lentiviral shRNA knockdown of EBF2, real-time PCR, ELISA (OPG protein), caspase-3/7 apoptosis assay\",\n      \"journal\": \"Clinical cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with defined downstream molecular and functional readouts (OPG levels and TRAIL apoptosis sensitivity), single lab\",\n      \"pmids\": [\"19671856\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Ebf2 is expressed in Schwann cells; loss of Ebf2 delays the onset of myelination, downregulates Schwann cell differentiation markers, causes nodal region abnormalities, shorter internodal length, and impairs motor nerve conduction velocity and amplitude, establishing EBF2 as required for peripheral nerve myelination and Schwann cell differentiation.\",\n      \"method\": \"Ebf2 KO mice, immunohistochemistry, electrophysiology (nerve conduction), morphometric analysis\",\n      \"journal\": \"Neurobiology of disease\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic KO with multiple independent phenotypic readouts (histology, electrophysiology, axonal caliber), replicated across developmental timepoints\",\n      \"pmids\": [\"21220016\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"EBF1 and EBF2 act as positive regulators of myelination in Schwann cells; combined knockdown of Ebf genes in myelinating dorsal root ganglia cultures severely impairs myelin formation, rescued by specific overexpression; EBF target gene profiling identifies Gliomedin as a direct target regulated by EBF factors in peripheral myelination.\",\n      \"method\": \"siRNA/shRNA knockdown and overexpression in DRG myelinating cultures, EBF target gene profiling, promoter regulation assays for Gliomedin\",\n      \"journal\": \"Molecular neurobiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with rescue, target gene identification, single lab\",\n      \"pmids\": [\"27889898\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Loss of Ebf2 causes a transient decrease in Cajal-Retzius cell numbers on the cortical surface due to a migratory defect originating from the cortical hem; both EBF2 and EBF3 directly control CR cell migration in vitro.\",\n      \"method\": \"Ebf2 KO mice, fate-mapping studies, in vitro cortical hem preparations with migration assays\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with in vivo and in vitro migration assays, multiple methods, single lab\",\n      \"pmids\": [\"22421355\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Ebf2 overexpression increases the generation of early-born neurons including Cajal-Retzius cells, while Ebf2 knockdown decreases it, demonstrating a direct regulatory role for EBF2 in cortical neurogenesis and CR neuron generation without affecting other layer-specific neurons.\",\n      \"method\": \"Lentiviral-mediated knockdown and overexpression in cortical cultures, Ebf2-EGFP transgenic reporter line\",\n      \"journal\": \"Developmental neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — KD/OE with defined neuronal phenotype, single lab, single platform\",\n      \"pmids\": [\"22042145\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Loss of Ebf2 in vivo causes a marked reduction in dopaminergic neuron number specifically in the midbrain periaqueductal gray matter but not in the substantia nigra or ventral tegmental area, demonstrating a selective requirement for EBF2 in PAG DA neuron development.\",\n      \"method\": \"Ebf2 KO mice, immunohistochemistry, quantification of TH+ neurons across midbrain subregions\",\n      \"journal\": \"Developmental neurobiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO with region-specific phenotypic readout, single lab\",\n      \"pmids\": [\"25762221\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"EBF2 binds H3K4me1 (monomethylated histone H3 Lys4) and cooperates with KMT2D (which catalyzes H3K4me1) at the KLLN gene promoter region to activate KLLN transcription; KMT2D and EBF2 cooperatively suppress PDAC cell proliferation, migration, and invasion through KLLN upregulation.\",\n      \"method\": \"ChIP-seq, RNA-seq, co-occupancy analysis, functional assays (proliferation, migration, invasion), EBF2 identified as H3K4me1-binding protein\",\n      \"journal\": \"Advanced science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP-seq identifying EBF2 as H3K4me1 reader, functional KD assays, single lab\",\n      \"pmids\": [\"38015024\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"SOX4 activates EBF2 transcription by directly binding its promoter; SOX4 and EBF2 cooperate to activate thermogenic gene expression in brown adipose tissue; phosphorylation of SOX4 at Ser235 by PKA promotes its nuclear translocation and thereby enhances EBF2 transcription.\",\n      \"method\": \"Sox4 conditional KO mice, SOX4 overexpression in BAT, ChIP assays (SOX4 binding to EBF2 promoter), co-immunoprecipitation (SOX4–EBF2 complex), PKA phosphorylation assays\",\n      \"journal\": \"Cell death and differentiation\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ChIP, genetic KO with thermogenic phenotype, single lab\",\n      \"pmids\": [\"39402212\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"The deubiquitinating enzyme USP2 physically interacts with EBF2 and stabilizes it by removing ubiquitin, thereby preventing EBF2 degradation; BAT-specific Usp2 knockdown impairs thermogenic programs, while Usp2 overexpression in BAT protects against obesity; EBF2 was identified as the substrate of USP2 mediating its thermogenic function.\",\n      \"method\": \"Co-immunoprecipitation, quantitative proteomics (substrate identification), adeno-associated virus and lentivirus KD/OE in vivo and in vitro, metabolic phenotyping\",\n      \"journal\": \"Molecular metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, proteome-wide substrate identification, genetic KD/OE with metabolic phenotype, single lab\",\n      \"pmids\": [\"40189098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"EBF2 directly regulates mitochondrial membrane phospholipid composition in brown adipocytes; Myf5Cre-driven Ebf2 deletion drastically reduces cardiolipin and phosphatidylethanolamine abundance and alters acyl chain remodeling; EBF2 directly binds the Srebf1 promoter and regulates expression of cardiolipin/PE-synthesizing genes; Ebf2 deletion reduces DRP1 and OPA1 levels, impairing mitochondrial fission-fusion dynamics.\",\n      \"method\": \"Myf5Cre conditional Ebf2 KO mice, lipidomics, ChIP (EBF2 binding to Srebf1), gene expression analysis, electron microscopy\",\n      \"journal\": \"Journal of lipid research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO, direct ChIP binding, lipidomics, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"40865612\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"Cars2-generated cysteine persulfide post-translationally modifies EBF2 via persulfidation; persulfidated EBF2 shows enhanced interaction with PPARγ and BRG1, increasing recruitment of the EBF2–PPARγ complex to browning gene promoters to drive brown fat development and thermogenesis; Cars2 is itself a direct transcriptional target of EBF2.\",\n      \"method\": \"Co-IP (EBF2–PPARγ and EBF2–BRG1 interactions after persulfidation), ChIP (EBF2-PPARγ complex at browning gene promoters), Cars2 KO in thermogenic fat, H2S donor treatment, EBF2 persulfidation biochemical assays\",\n      \"journal\": \"Advanced science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ChIP, genetic KO, biochemical persulfidation assays, single lab\",\n      \"pmids\": [\"41849685\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"EBF2 contains a low-complexity C-terminal domain (CTD) that drives biomolecular condensate (phase separation) formation; deletion of the CTD or mutation of conserved proline residues disrupts EBF2 phase separation without affecting genomic occupancy; EBF2 condensates sequester the transcriptional repressor ZFP423 and exclude HDAC1, creating a permissive chromatin environment for thermogenic gene expression; fusion of an IDR from FUS but not MED1 rescues condensate function.\",\n      \"method\": \"EBF2 ΔCTD/proline mutants in vitro and in male mice, live-cell condensate imaging, co-immunoprecipitation (ZFP423/HDAC1 in condensates), ChIP, small-molecule condensate screen\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — domain deletion mutagenesis, condensate imaging, Co-IP, ChIP, in vivo mouse model, single lab\",\n      \"pmids\": [\"42026085\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2026,\n      \"finding\": \"A heterozygous nonsense EBF2 variant (p.E165X) impairs adipocyte differentiation and adipose tissue remodeling in vitro and in Ebf2E165X/+ knock-in mice; the variant causes excess accumulation of undifferentiated CD34+ cells, defective extracellular matrix remodeling, abnormal adipocyte hypertrophy, reduced adiponectin/leptin expression, glucose intolerance, and downregulation of mitochondrial fatty acid metabolism genes specifically in adipose tissue.\",\n      \"method\": \"Heterozygous knock-in (Ebf2E165X/+) mice, in vitro adipogenesis assays, gene expression analysis, metabolic phenotyping, histology\",\n      \"journal\": \"The Journal of clinical investigation\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — patient variant modeled in knock-in mice and in vitro, multiple orthogonal readouts (cell differentiation, ECM, metabolic phenotype), peer-reviewed\",\n      \"pmids\": [\"41615236\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"EBF2 interacts with transcriptional co-activators CBP/P300 to induce H3K27ac deposition and chromatin activation at brown adipose tissue-associated genes, driving progressive specification of the brown fat lineage from Pax7+ mesodermal stem cells; EBF2 expression during a critical embryonic window (E10.5–E14.5 in mouse) is required for BAT lineage specification.\",\n      \"method\": \"ChIP-seq (H3K4me3, H3K27me3, H3K27ac dynamics), Co-IP (EBF2–CBP/P300 interaction), comparative mouse/pig analysis, ectopic EBF2 expression in mesodermal stem cells\",\n      \"journal\": \"Journal of advanced research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ChIP-seq, ectopic expression, comparative species analysis, single lab\",\n      \"pmids\": [\"39736442\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"SOX4 forms two independent complexes with EBF2 and with PPARγ to promote thermogenic gene expression in BAT; SOX4 directly binds the promoter regions of thermogenic genes independent of EBF2; deletion of SOX4 in BAT (Sox4-BKO mice) downregulates thermogenic and oxidative phosphorylation genes and reduces mitochondrial numbers.\",\n      \"method\": \"Co-immunoprecipitation (SOX4–EBF2 and SOX4–PPARγ complexes), ChIP (SOX4 direct binding to thermogenic gene promoters), Sox4 conditional KO (Ucp1Cre+), in vitro loss-of-function\",\n      \"journal\": \"Advanced biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP, ChIP, genetic KO with phenotypic readout, single lab\",\n      \"pmids\": [\"40977422\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"miR-204-5p directly binds the 3' UTR of EBF2 mRNA to regulate its stability; overexpression of EBF2 inhibits apoptosis and promotes migration and invasion of osteosarcoma cells, and EBF2 overexpression rescues the pro-apoptotic/anti-migratory phenotype caused by miR-204-5p overexpression.\",\n      \"method\": \"Luciferase reporter assay (miR-204-5p binding to EBF2 3'UTR), EBF2 overexpression rescue experiments, apoptosis assays, migration/invasion assays, xenograft model\",\n      \"journal\": \"Biochimie\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — luciferase 3'UTR assay, rescue experiment, in vivo xenograft, single lab\",\n      \"pmids\": [\"30529043\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"EBF2 is a helix-loop-helix transcription factor that determines brown/beige adipocyte identity by recruiting PPARγ to brown-selective enhancers, physically interacting with the BAF chromatin remodeling complex (via BRG1) and DPF3 to remodel chromatin, and forming phase-separated condensates that sequester the repressor ZFP423 while excluding HDAC1; it is stabilized by the deubiquitinase USP2 and activated post-translationally by Cars2-mediated persulfidation (which enhances its interaction with PPARγ and BRG1); upstream, SOX4 (activated by PKA phosphorylation) directly transcribes EBF2, while ZFP423 antagonizes EBF2 by recruiting the NuRD corepressor to EBF2-bound enhancers; beyond fat, EBF2 activates OPG transcription in osteoblast progenitors to regulate osteoclast differentiation via RANK-RANKL signaling, and is required for GnRH neuron migration, peripheral nerve myelination (in part through direct regulation of the Gliomedin promoter), Cajal-Retzius cell migration from the cortical hem, and midbrain PAG dopaminergic neuron development.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"EBF2 is a sequence-specific helix-loop-helix transcription factor that acts as a master determinant of brown and beige adipocyte identity, marking embryonic brown adipogenic precursors and reprogramming myoblasts or white preadipocytes toward a thermogenic fate [#0, #6, #7]. Mechanistically, EBF2 recruits PPAR\\u03b3 to brown-fat-selective enhancers and physically engages the BAF chromatin-remodeling complex through BRG1, while transcriptionally activating the brown-selective BAF subunit DPF3 to open chromatin at its target enhancers [#0, #1]; it also cooperates with CBP/P300 to deposit H3K27ac during a defined embryonic window of BAT lineage specification and itself reads the H3K4me1 mark [#21, #14]. EBF2 nucleates phase-separated condensates via a low-complexity C-terminal domain that sequester the repressor ZFP423 and exclude HDAC1 to create a permissive thermogenic chromatin environment, counteracting the antagonistic ZFP423\\u2013NuRD corepressor module that otherwise restrains EBF2-bound enhancers in white fat [#19, #2]. Its activity is tuned post-translationally\\u2014stabilized against degradation by the deubiquitinase USP2 and activated by Cars2-dependent persulfidation that strengthens its interaction with PPAR\\u03b3 and BRG1\\u2014and upstream by SOX4, which is induced by PKA and directly transcribes EBF2 [#16, #18, #15]. Beyond adipose tissue, EBF2 directly transactivates the osteoprotegerin (Opg) promoter to regulate osteoclast differentiation and bone mass [#3], and is required for GnRH neuron migration, peripheral nerve myelination and Schwann cell differentiation, Cajal-Retzius cell migration, and midbrain PAG dopaminergic neuron development [#5, #9, #11, #13]. A heterozygous nonsense EBF2 variant (p.E165X) impairs adipocyte differentiation and adipose remodeling and causes glucose intolerance in knock-in mice, linking EBF2 dysfunction to metabolic disease [#20].\",\n  \"teleology\": [\n    {\n      \"year\": 2003,\n      \"claim\": \"Established the first in vivo requirements for EBF2, showing it is essential for neuroendocrine and peripheral nervous system development before any role in fat was known.\",\n      \"evidence\": \"Targeted Ebf2 deletion in mice with neuroanatomy and nerve electrophysiology\",\n      \"pmids\": [\"12466206\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets in GnRH neurons and nerve not identified\", \"Cell-autonomous vs non-autonomous mechanism unresolved\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Identified the first direct EBF2 target gene, Opg, defining a transcriptional mechanism linking EBF2 to bone homeostasis via osteoclast control.\",\n      \"evidence\": \"Promoter binding/transactivation assays and Ebf2 KO mice with bone phenotype\",\n      \"pmids\": [\"16326388\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cofactors at the Opg promoter beyond LEF1/TCF not fully defined\", \"Direct vs indirect contribution to bone mass not dissected\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Placed EBF proteins within the core adipogenic cascade by showing they directly activate PPAR\\u03b31 and C/EBP\\u03b1, before brown-specific roles were known.\",\n      \"evidence\": \"Promoter activation assays and shRNA knockdown in 3T3-L1 cells\",\n      \"pmids\": [\"17060461\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"EBF1 vs EBF2 specific contributions not separated\", \"Single lab\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Revealed the defining function of EBF2 as a brown-fat determinant that recruits PPAR\\u03b3 to brown-selective enhancers, explaining how a shared adipogenic factor specifies lineage identity.\",\n      \"evidence\": \"ChIP-seq, ectopic expression in myoblasts/white preadipocytes, Ebf2 KO mice\",\n      \"pmids\": [\"23499423\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Chromatin-remodeling machinery not yet identified\", \"How brown-specific enhancer selection is achieved unresolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Defined EBF2 as a prospective marker and regulator of embryonic brown adipogenic precursors, distinguishing brown vs beige fates by cellular origin.\",\n      \"evidence\": \"Ebf2-GFP reporter mice, prospective cell isolation, RNA-seq, KO and ectopic expression\",\n      \"pmids\": [\"25197048\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular basis of brown vs beige fate divergence not defined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Extended EBF2's requirement to inducible beige fat, showing it is necessary and sufficient for the adrenergically driven thermogenic program in WAT.\",\n      \"evidence\": \"Ebf2 KO and adipose-transgenic OE mice, primary cultures, UCP1/mitochondrial assays\",\n      \"pmids\": [\"26844207\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Connection between adrenergic signaling and EBF2 activity not mechanistically traced\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Provided the chromatin-remodeling mechanism for EBF2 function, showing it recruits BAF via BRG1 and activates the brown-selective subunit DPF3 to open its target enhancers.\",\n      \"evidence\": \"Reciprocal Co-IP, ChIP-seq, ATAC-seq with DPF3 loss-of-function, promoter assays\",\n      \"pmids\": [\"28428261\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structural basis of EBF2\\u2013BRG1 interaction unknown\", \"How DPF3 enforces brown selectivity not resolved\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Defined the molecular antagonism restraining EBF2 in white fat, showing ZFP423 recruits NuRD to EBF2 enhancers and that breaking this interaction triggers a corepressor-to-coactivator switch and browning.\",\n      \"evidence\": \"Co-IP, CRISPR disruption of the PPI, PPAR\\u03b3 ChIP-seq, Zfp423 conditional KO\",\n      \"pmids\": [\"34620682\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Signals controlling the ZFP423\\u2013EBF2 interaction in vivo not identified\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Identified upstream transcriptional and signaling control of EBF2 by SOX4, linking PKA signaling to EBF2 induction and thermogenesis.\",\n      \"evidence\": \"Sox4 conditional KO and OE, ChIP at the EBF2 promoter, Co-IP, PKA phosphorylation assays\",\n      \"pmids\": [\"39402212\", \"40977422\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether SOX4 and EBF2 functions are separable in vivo not fully resolved\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Showed EBF2 reads H3K4me1 and cooperates with KMT2D to activate KLLN, extending EBF2's coactivator partnerships and revealing a tumor-suppressive role in PDAC.\",\n      \"evidence\": \"ChIP-seq, RNA-seq, co-occupancy, functional proliferation/invasion assays\",\n      \"pmids\": [\"38015024\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Generality of H3K4me1 reading across EBF2 target loci untested\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Connected EBF2 to histone acetylation by showing it recruits CBP/P300 to deposit H3K27ac during a critical embryonic window of BAT specification.\",\n      \"evidence\": \"ChIP-seq histone mark dynamics, Co-IP, ectopic expression, comparative species analysis\",\n      \"pmids\": [\"39736442\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Temporal coordination with BAF/DPF3 remodeling not integrated\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Revealed post-translational stabilization of EBF2 by the deubiquitinase USP2 as a control point for thermogenic capacity and obesity resistance.\",\n      \"evidence\": \"Co-IP, proteome-wide substrate ID, AAV/lentiviral KD/OE in vivo, metabolic phenotyping\",\n      \"pmids\": [\"40189098\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"E3 ligase opposing USP2 not identified\", \"Single lab\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Linked EBF2 directly to mitochondrial phospholipid biology, showing it binds Srebf1 and controls cardiolipin/PE synthesis and fission-fusion machinery in brown adipocytes.\",\n      \"evidence\": \"Myf5Cre Ebf2 KO, lipidomics, ChIP at Srebf1, electron microscopy\",\n      \"pmids\": [\"40865612\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether mitochondrial defects are direct or secondary to lost identity unclear\", \"Single lab\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Demonstrated that EBF2 forms phase-separated condensates that sequester ZFP423 and exclude HDAC1, providing a biophysical mechanism for creating a permissive thermogenic chromatin environment.\",\n      \"evidence\": \"\\u0394CTD/proline mutants in vitro and in mice, live-cell imaging, Co-IP, ChIP, IDR swaps\",\n      \"pmids\": [\"42026085\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Endogenous condensate dynamics in vivo not fully quantified\", \"Single lab\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Identified Cars2-mediated persulfidation as a post-translational activation switch enhancing EBF2 interaction with PPAR\\u03b3 and BRG1, with EBF2 also transcribing Cars2 in a feedforward loop.\",\n      \"evidence\": \"Co-IP after persulfidation, ChIP, Cars2 KO, H2S donor and persulfidation biochemistry\",\n      \"pmids\": [\"41849685\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Persulfidated residues on EBF2 not mapped\", \"Single lab\"]\n    },\n    {\n      \"year\": 2026,\n      \"claim\": \"Established a disease link by showing a heterozygous EBF2 nonsense variant impairs adipose differentiation and remodeling and causes metabolic dysfunction.\",\n      \"evidence\": \"Ebf2E165X/+ knock-in mice, in vitro adipogenesis, metabolic phenotyping, histology\",\n      \"pmids\": [\"41615236\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Human patient genetics beyond the modeled variant not detailed\", \"Mechanism of dominant effect not fully dissected\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How EBF2's many post-translational, condensate, and cofactor inputs are integrated to achieve tissue-specific target selection, and how its neuronal/skeletal roles relate mechanistically to its adipose function, remain open.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of EBF2\\u2013PPAR\\u03b3 or EBF2\\u2013BRG1 complexes\", \"Direct targets in neurons largely unidentified\", \"Integration of persulfidation, ubiquitination, and condensate formation not unified\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 1, 3, 4, 6, 7]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [0, 3, 17]},\n      {\"term_id\": \"GO:0042393\", \"supporting_discovery_ids\": [14]},\n      {\"term_id\": \"GO:0140313\", \"supporting_discovery_ids\": [19]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [1, 2, 19]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [0, 1, 3]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [1, 19, 21]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [5, 6, 9, 11]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [7, 17, 20]}\n    ],\n    \"complexes\": [\"BAF chromatin remodeling complex\"],\n    \"partners\": [\"PPARG\", \"BRG1\", \"DPF3\", \"ZFP423\", \"SOX4\", \"USP2\", \"CBP/P300\", \"HDAC1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}