{"gene":"ESRRB","run_date":"2026-04-28T17:46:03","timeline":{"discoveries":[{"year":1997,"finding":"Targeted disruption of Esrrb in mice causes severely impaired placental formation with overabundance of trophoblast giant cells and deficiency of diploid trophoblast, and this phenotype is rescued by aggregation with tetraploid wild-type cells contributing exclusively to extra-embryonic tissues, establishing Esrrb's cell-autonomous role in chorion/trophoblast development.","method":"Targeted gene disruption (knockout mouse), tetraploid rescue experiment","journal":"Nature","confidence":"High","confidence_rationale":"Tier 1-2 — clean knockout with defined cellular phenotype, genetic rescue by tetraploid complementation, foundational paper with 340 citations","pmids":["9285590"],"is_preprint":false},{"year":2007,"finding":"ERRβ (Esrrb) controls the cell fate and gene expression of endolymph-producing epithelial cells (strial marginal cells and vestibular dark cells) in the inner ear; loss of Nr3b2 causes failure to express ion channel/transporter genes and partial transformation toward adjacent Pendrin-expressing epithelial fate, with secondary loss of underlying intermediate cells and strial capillaries.","method":"Nr3b2 knockout mouse, transcriptome comparison, genetically mosaic mice","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 2 — clean KO with defined cellular and molecular phenotypes, mosaic analysis adds cell-autonomy evidence","pmids":["17765677"],"is_preprint":false},{"year":2007,"finding":"Short-form human ERRβ (SFhERRbeta) physically interacts with Nrf2 (not by competing for ARE DNA-binding sites) and potently represses Nrf2 transcriptional activity on antioxidant response element-mediated gene expression; SFhERRbeta also alters the subcellular localization of Nrf2, and deletion mapping showed interaction through multiple sites of SFhERRbeta.","method":"Co-immunoprecipitation, confocal immunofluorescence, deletion mutant analysis, reporter assays","journal":"Molecular and cellular endocrinology","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP plus functional reporter assay in single lab, localization data included","pmids":["17920186"],"is_preprint":false},{"year":2008,"finding":"ESRRB binds two ERRE sites in the proximal 5'-UTR of the mouse Oct4 gene to activate its transcription; ESRRB physically interacts with NANOG through their DNA-binding domains, and this interaction reciprocally modulates their transcriptional activities to maintain ESC pluripotency.","method":"Reporter assay, ChIP, co-immunoprecipitation, domain mapping, stable transfection","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods (ChIP, Co-IP, domain mapping, reporter), single lab but strong mechanistic follow-up","pmids":["18957414"],"is_preprint":false},{"year":2008,"finding":"Loss-of-function mutations in ESRRB (frameshift, missense in DNA-binding domain at p.A110V, and ligand-binding domain at p.L320P, p.V342L, p.L347P) cause autosomal-recessive nonsyndromic hearing impairment DFNB35; molecular modeling indicates mutations affect structure/stability of DNA-binding and ligand-binding domains.","method":"Homozygosity mapping, mutation analysis, molecular modeling, RNA in situ hybridization, immunohistochemistry","journal":"American journal of human genetics","confidence":"High","confidence_rationale":"Tier 2 — genetic loss-of-function with defined phenotype, domain-specific mutations replicated in multiple families across populations","pmids":["18179891"],"is_preprint":false},{"year":2009,"finding":"Esrrb functions in conjunction with Oct4 and Sox2 to mediate reprogramming of mouse embryonic fibroblasts to induced pluripotent stem cells, and Esrrb targets many genes involved in self-renewal and pluripotency in ES cells, enabling reprogramming without exogenous Klf transcription factors.","method":"Retroviral transduction, iPSC generation, expression and epigenetic profiling, in vivo differentiation, chimaera formation","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 2 — direct gain-of-function in reprogramming with multiple functional readouts; 359 citations, widely replicated","pmids":["19136965"],"is_preprint":false},{"year":2010,"finding":"ERRβ overexpression in retina induces rod-specific gene expression; ERRβ mutation causes rod photoreceptor dysfunction and degeneration; inverse agonists of ERRβ trigger rapid rod degeneration rescued by constitutively active ERRβ mutants; ERRβ coordinates expression of genes rate-limiting for ATP generation and consumption in photoreceptors; ERRβ activity rescues Crx loss-of-function photoreceptor defects.","method":"Overexpression in wild-type and Nrl-/- retinas, knockout mouse, pharmacological inverse agonists, constitutively active mutants, epistasis with Crx","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1-2 — multiple complementary loss-of-function and gain-of-function approaches with defined molecular and cellular phenotypes","pmids":["20534447"],"is_preprint":false},{"year":2012,"finding":"Esrrb is a direct target of Tcf3 repression downstream of Gsk3 inhibition in ESCs; Esrrb knockdown/knockout eliminates response to Gsk3 inhibition and causes loss of pluripotency, while forced Esrrb expression phenocopies Gsk3 inhibition or Tcf3 deletion by sustaining self-renewal, placing Esrrb as necessary and sufficient downstream of the Gsk3/Tcf3 axis.","method":"Genome localization (ChIP-seq), transcriptome analysis, knockdown, knockout, forced expression, functional colony-forming assays","journal":"Cell stem cell","confidence":"High","confidence_rationale":"Tier 2 — genetic epistasis with multiple orthogonal approaches, 320 citations","pmids":["23040478"],"is_preprint":false},{"year":2012,"finding":"Nanog directly binds the Esrrb locus, enhances RNA Pol II binding, and stimulates Esrrb transcription; Esrrb overexpression maintains LIF-independent self-renewal in Nanog-/- ESCs and can reprogram Nanog-/- EpiSCs; Esrrb deletion abolishes Nanog's ability to confer LIF-independent self-renewal, placing Esrrb functionally downstream of Nanog.","method":"ChIP-seq, inducible Nanog protein systems, Nanog-/- ESCs, overexpression, rescue assays","journal":"Cell stem cell","confidence":"High","confidence_rationale":"Tier 1-2 — direct ChIP evidence of Nanog binding Esrrb locus, combined with genetic rescue experiments, 267 citations","pmids":["23040477"],"is_preprint":false},{"year":2012,"finding":"Ncoa3 interacts with Esrrb via Esrrb's ligand-binding domain and bridges Esrrb to RNA polymerase II complexes; Ncoa3 is required for Esrrb function in ESC self-renewal and reprogramming; Ncoa3 shares overlapping gene regulatory functions with Esrrb and cooperates genome-wide with Oct4-Sox2-Nanog circuitry at active enhancers.","method":"Co-immunoprecipitation, domain mapping, ChIP-seq, microarray, knockdown, overexpression","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 — reciprocal Co-IP with domain mapping, ChIP-seq, and functional knockdown with defined phenotype, all in single lab","pmids":["23019124"],"is_preprint":false},{"year":2013,"finding":"Dax1 physically interacts with Esrrb through its LXXLL motifs (binding the activation- and ligand-binding domains of Esrrb) and represses Esrrb transcriptional activity; Esrrb directly binds the Dax1 promoter via ERRE1 to activate Dax1 expression independently of Oct3/4; Oct3/4, Dax1, and Esrrb show competitive inhibition among complexes, forming a regulatory loop for pluripotency.","method":"Co-immunoprecipitation, domain mapping (LXXLL motif), reporter assay, ChIP, gain-of-function/loss-of-function","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 — reciprocal interaction mapped to specific domains, combined with direct promoter binding by ChIP and functional reporter assays","pmids":["23508100"],"is_preprint":false},{"year":2013,"finding":"Esrrb and Sox2 co-bind a constrained composite DNA motif (Esrrb-Sox motif, 2–8 bp gap) in ESCs as identified by genome-wide ChIP-seq co-motif discovery; the Esrrb-Sox2 complex regulates genes (e.g., Klf4, Klf5, Nr0b1) that distinguish ESCs from epiblast stem cells.","method":"ChIP-seq, co-motif discovery algorithm (fexcom), knockdown experiments","journal":"Stem cells","confidence":"Medium","confidence_rationale":"Tier 2-3 — genome-wide co-binding identified computationally and validated by knockdown, single lab","pmids":["23169531"],"is_preprint":false},{"year":2014,"finding":"ERRβ overexpression in breast cancer cells activates FST (Follistatin) and BCAS2 transcription via direct binding (identified by ChIP cloning and gel supershift); ERRβ physically interacts with ERα (Co-IP); ERRβ-mediated BCAS2 upregulation inhibits FST transcription through downregulation of β-catenin/TCF4 recruitment to the FST promoter, and FST promotes apoptosis/E-cadherin expression while BCAS2 downregulates cyclin D1 to block G1/S transition.","method":"ChIP cloning, gel supershift assay, Co-immunoprecipitation, western blot, confocal microscopy, qRT-PCR","journal":"British journal of cancer","confidence":"Medium","confidence_rationale":"Tier 2-3 — direct ChIP identification of target genes with Co-IP for protein interaction; single lab","pmids":["24667650"],"is_preprint":false},{"year":2015,"finding":"In trophoblast stem (TS) cells, Esrrb is a downstream target of Fgf signalling; Esrrb directly binds and regulates TS cell-specific transcription factors Elf5 and Eomes; Esrrb interactome in TS cells (by mass spectrometry) includes the histone demethylase Lsd1 and the RNA Polymerase II-associated Integrator complex, distinct from its ES cell interactome.","method":"ChIP-seq, mass spectrometry interactome, loss-of-function, gain-of-function, Fgf signaling manipulation","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1-2 — MS-defined interactome combined with ChIP-seq and functional assays; multiple orthogonal methods","pmids":["26206133"],"is_preprint":false},{"year":2016,"finding":"Esrrb remains dynamically bound to key regulatory regions during mitosis in pluripotent ESCs (mitotic bookmarking); mitotic Esrrb binding is driven by specific recognition of its DNA-binding motif and is associated with early transcriptional re-activation of target genes after mitosis completion.","method":"Live-cell imaging, ChIP-seq during mitosis, FRAP, motif analysis","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 2 — direct mitotic chromatin binding established by ChIP-seq with motif validation and functional link to gene re-activation; 120 citations","pmids":["27723719"],"is_preprint":false},{"year":2016,"finding":"Esrrb directly binds the Gata6 promoter at ERRE2 to activate Gata6 expression; this activity is repressed by Dax1 (which associates with Esrrb bound to ERRE2 but does not itself bind ERRE2) and enhanced by Ncoa3; Dax1 also associates with Ncoa3 to repress Ncoa3 transcriptional activity, maintaining ES cell undifferentiated state.","method":"Biotin DNA pulldown, ChIP, reporter assay, overexpression, co-immunoprecipitation","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2-3 — direct DNA binding confirmed by pulldown and ChIP, protein interactions confirmed by Co-IP, single lab","pmids":["27601327"],"is_preprint":false},{"year":2018,"finding":"Esrrb acts as a pioneer factor in reprogramming of epiblast stem cells to naive pluripotency by binding to silenced enhancers containing stable nucleosomes and hypermethylated DNA that are inaccessible to Oct4, Sox2, Nanog; Esrrb binding is accompanied by local loss of DNA methylation, LIF-dependent p300 engagement, and nucleosome displacement, leading to recruitment of core pluripotency factors within ~2 days.","method":"ATAC-seq, bisulfite sequencing, ChIP-seq, time-course reprogramming assays","journal":"Cell stem cell","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal epigenomic methods defining sequential mechanistic steps; 63 citations","pmids":["29910149"],"is_preprint":false},{"year":2017,"finding":"Esrrb activates oxidative phosphorylation (OXPHOS) during reprogramming while Zic3 represses it; the combined action of Esrrb (OXPHOS activation) and Zic3 (glycolysis activation) achieves a hybrid energy metabolism (glycolysis + OXPHOS) required for efficient naive pluripotency induction; Esrrb-mediated OXPHOS activation is also critical for conversion of primed PSCs to the naive state.","method":"Overexpression, metabolic flux analysis, seahorse assay, reprogramming efficiency assays","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 — direct metabolic measurements combined with gain/loss-of-function assays defining specific pathway roles","pmids":["28467928"],"is_preprint":false},{"year":2018,"finding":"Esrrb downregulation in Nanog-low ESCs triggers loss of NANOG and OCT4 binding at Class I regulatory elements associated with naive-specific genes, while Class II elements retain OCT4 but lose NANOG binding, demonstrating that Esrrb level determines the chromatin occupancy of core pluripotency TFs and restricts potency during naive pluripotency exit.","method":"Fluorescent reporter lines, FACS sorting, ChIP-seq in Esrrb-positive vs Esrrb-negative cells","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 — ChIP-seq in purified cell populations with defined TF occupancy changes linked to functional potency differences","pmids":["30275266"],"is_preprint":false},{"year":2019,"finding":"ESRRB is O-GlcNAcylated by O-GlcNAc transferase (OGT) at serine 25; this modification stabilizes ESRRB protein, promotes its transcriptional activity, and facilitates its interactions with OCT4 and NANOG, thereby supporting mESC self-renewal and pluripotency.","method":"Metabolic labeling with azido-sugar reporters, mass spectrometry, site-directed mutagenesis (S25 mutation), Co-immunoprecipitation, transcriptional activity assays","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 1 — site-specific PTM identified by MS and confirmed by mutagenesis, writer identified (OGT), functional consequences measured by Co-IP and activity assays","pmids":["31492838"],"is_preprint":false},{"year":2019,"finding":"In trophoblast stem cells, Esrrb directly binds an enhancer at the Bmp4 locus (identified by ChIP-seq and luciferase reporter assay) and activates Bmp4 expression in the extraembryonic ectoderm; loss of this enhancer (CRISPR deletion) or Esrrb itself reduces Bmp4 expression and primordial germ cell numbers.","method":"ChIP-seq, luciferase reporter assay, CRISPR/Cas9 enhancer deletion, microarray, PGC counting","journal":"Developmental biology","confidence":"High","confidence_rationale":"Tier 1-2 — enhancer identified by ChIP-seq, validated by reporter assay, causally confirmed by CRISPR deletion of the enhancer in vivo","pmids":["31315026"],"is_preprint":false},{"year":2020,"finding":"ERRβ protein is targeted for proteasomal degradation by the SCF E3 ubiquitin ligase complex activated by NEDDylation; inhibition of NEDDylation with MLN4924 restores ERRβ expression in breast cancer cells, reduces proliferation and migration, and ERRβ recruits the co-activator p300 to target gene promoters (p21Cip1/Waf1, E-cadherin) to upregulate their expression.","method":"In vitro and in vivo degradation assays, MLN4924 inhibitor, ChIP (p300 recruitment), western blot, cell proliferation/migration assays","journal":"Cell death & disease","confidence":"Medium","confidence_rationale":"Tier 2-3 — biochemical degradation pathway identified with inhibitor validation; p300 recruitment by ChIP; single lab","pmids":["32839427"],"is_preprint":false},{"year":2020,"finding":"The canonical Wnt/β-catenin pathway signals through Esrrb as its central downstream factor to regulate tissue-scale organization (morphogenesis and maintenance) of the murine pluripotent epiblast during diapause; autocrine Wnt activity controls epiblast architecture when development is paused.","method":"3D in vitro model of epiblast development, Wnt pathway manipulation, Esrrb conditional knockout, live imaging","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 — genetic epistasis in 3D model with in vivo diapause context; single lab","pmids":["33127892"],"is_preprint":false},{"year":2021,"finding":"Oocyte-specific linker histone H1foo physically interacts with Esrrb; Esrrb is necessary for H1foo-dependent chromatin decondensation at specific target loci (oocyte-specific genes), as shown by ChIP-seq of H1foo-overexpressing ESCs and endogenous H1foo in oocytes.","method":"ChIP-seq, Co-immunoprecipitation, overexpression, chromatin accessibility analysis","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP plus ChIP-seq establishing functional requirement of Esrrb for H1foo chromatin activity; single lab","pmids":["34023782"],"is_preprint":false},{"year":2021,"finding":"Esrrb and Nr5a2 conjointly occupy a large common set of regulatory elements in naive mouse ESCs and together control binding of Oct4, Sox2, and Nanog to DNA; double knockout of Esrrb and Nr5a2 collapses the pluripotency network and causes ESC differentiation, paralleling the requirement for Oct4 and Sox2.","method":"Single and double knockout, ChIP-seq, transcriptome analysis","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 — genetic epistasis by double KO combined with genome-wide TF occupancy changes, clear phenotype","pmids":["34397088"],"is_preprint":false},{"year":2022,"finding":"ERR2 (Esrrb/ERRβ) and ERR3 (ERRγ) are required in motor neurons for gamma motor neuron functional properties (low firing thresholds, high firing rates) necessary for muscle proprioception and movement control; gain-of-function in chick suggests ERR2/3 operate via transcriptional activation of neural activity modulators.","method":"Selective motor neuron knockout, electrophysiology, gain-of-function in chick, transcriptomics","journal":"PLoS biology","confidence":"High","confidence_rationale":"Tier 2 — selective KO with electrophysiological phenotype and complementary gain-of-function; rigorously defined cellular phenotype","pmids":["36542664"],"is_preprint":false},{"year":2022,"finding":"Esrrb is upregulated during G2/M phase of the cell cycle and drives extraembryonic endoderm (XEN) differentiation in a cell-cycle-dependent manner; ESRRB knockout ESCs lose the potential to differentiate into XEN, and G1 cells forced to overexpress Esrrb acquire XEN differentiation capacity; ESRRB associates with XEN-poised enhancers.","method":"Cell-cycle reporter system, scRNA-seq, CRISPR knockout, overexpression, ATAC-seq/ChIP-seq on WT vs KO ESCs","journal":"Stem cell reports","confidence":"Medium","confidence_rationale":"Tier 2-3 — cell-cycle-resolved loss/gain-of-function with chromatin enhancer association; single lab","pmids":["35594859"],"is_preprint":false},{"year":2023,"finding":"ESRRB activates transcription of SMAD7 (a TGFβ pathway inhibitor) in cervical cancer cells, blocking phosphorylation and nuclear translocation of SMAD2/3, thereby downregulating CDKN1A and upregulating CCNA2 and MYC; MYC in turn transactivates ESRRB and upregulates SMAD7, forming a positive feedback loop that promotes cell-cycle progression.","method":"CRISPR/Cas9 knockout, ectopic expression, reporter assays, western blot for pSMAD2/3, cell-cycle analysis, xenograft tumor model","journal":"Cancer research","confidence":"High","confidence_rationale":"Tier 2 — CRISPR KO and rescue with defined molecular pathway (SMAD7/TGFβ), multiple orthogonal readouts, in vivo validation","pmids":["37350664"],"is_preprint":false},{"year":2023,"finding":"ESRRB is required and sufficient to activate formative gene expression programs in naive-to-formative epiblast transition; Esrrb genetic inactivation leads to illegitimate mesendoderm/extra-embryonic marker expression, impaired formative transcription, failure to self-organize in 3D, and impaired primordial germ cell generation; ESRRB occupies key formative gene loci in naive cells and throughout the formative state.","method":"Genetic inactivation, gain-of-function, 3D organoid self-organization assay, ChIP-seq, transcriptome analysis, PGCLC differentiation assay","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 2 — combined loss- and gain-of-function with genome-wide occupancy, 3D functional assay, and developmental phenotypes","pmids":["37106060"],"is_preprint":false},{"year":2024,"finding":"ESRRB is lactylated on K228 and K232 in response to intracellular lactate (linked to glycolysis); lactylation enhances ESRRB activity in promoting ESC self-renewal (in absence of LIF) and XEN differentiation by increasing its binding at target genes.","method":"Mass spectrometry, site-directed mutagenesis (K228/K232), ChIP-seq, functional self-renewal and differentiation assays","journal":"International journal of molecular sciences","confidence":"Medium","confidence_rationale":"Tier 1-2 — site-specific PTM identified by MS, confirmed by mutagenesis, linked to target gene binding by ChIP-seq; single lab","pmids":["38473939"],"is_preprint":false},{"year":2025,"finding":"ERK phosphorylates ESRRB at Serine 42 and Serine 43; dephosphorylated ESRRB (mimicking MEK inhibition) shows enhanced binding to pluripotency genes and promotes self-renewal, while phosphorylated ESRRB shows increased binding to extraembryonic endoderm (XEN) genes and promotes XEN differentiation.","method":"Quantitative phosphoproteomics, site-directed mutagenesis (S42A/S43A phosphomutants), ChIP-seq, functional differentiation assays","journal":"Stem cell reports","confidence":"High","confidence_rationale":"Tier 1 — kinase-substrate relationship confirmed by phosphoproteomics + mutagenesis, with ChIP-seq showing altered DNA binding at distinct gene sets","pmids":["39919750"],"is_preprint":false},{"year":2025,"finding":"In naïve ESCs, ESRRB co-opts MIR (mammalian-wide interspersed repeat) SINE-derived enhancers for naïve-specific gene expression; ESRRB binding to MIR enhancers promotes formation of enhancer-to-super-enhancer loops regulating pluripotency genes; ESRRB co-occupies MIR elements with the structural protein YY1; loss of an ESRRB-bound MIR enhancer impairs self-renewal.","method":"Hi-C, H3K27ac HiChIP, CRISPR-guided TE proteomics, CRISPR MIR enhancer deletion, ChIP-seq","journal":"Genome biology","confidence":"Medium","confidence_rationale":"Tier 2 — genome-wide 3D chromatin + CRISPR deletion establishes functional enhancer; Co-occupancy with YY1 by ChIP-seq; single lab","pmids":["40296153"],"is_preprint":false}],"current_model":"ESRRB is an orphan nuclear receptor that functions as a sequence-specific transcription factor and pioneer factor at the hub of the naive pluripotency network: it is activated downstream of Gsk3 inhibition/Wnt-β-catenin/Tcf3 and Nanog/LIF-Jak-Stat3 signaling, directly binds and activates Oct4, Dax1, Bmp4, Gata6, Elf5, Eomes, and formative gene loci, recruits co-activators Ncoa3 and p300 and interacts with the Integrator complex and histone demethylase Lsd1, acts as a mitotic bookmarking factor to maintain regulatory element accessibility through cell division, drives reprogramming by pioneering closed/methylated chromatin to recruit Oct4-Sox2-Nanog, and has its activity fine-tuned by post-translational modifications including O-GlcNAcylation (OGT at S25, stabilizing and activating), lactylation (K228/K232, enhancing target binding), and ERK phosphorylation (S42/S43, redirecting binding from pluripotency to XEN genes); loss-of-function causes placental failure, inner ear degeneration (DFNB35 hearing loss), rod photoreceptor degeneration, loss of gamma motor neuron functional properties, and collapse of naive pluripotency."},"narrative":{"teleology":[{"year":1997,"claim":"The first loss-of-function study established that ESRRB is cell-autonomously required for chorion/trophoblast development, revealing its essential role in extraembryonic tissue formation.","evidence":"Targeted knockout mouse with tetraploid rescue demonstrating placental-restricted phenotype","pmids":["9285590"],"confidence":"High","gaps":["Downstream transcriptional targets in trophoblast were unknown","Whether ESRRB has embryonic (non-extraembryonic) roles was unresolved"]},{"year":2007,"claim":"Beyond placenta, ESRRB was shown to control cell fate in the inner ear (strial marginal cells) and to physically interact with Nrf2 to repress antioxidant response element-mediated transcription, broadening its known tissue repertoire and revealing a protein-interaction-based repressive mechanism.","evidence":"Inner ear knockout with transcriptomic and mosaic analysis; Co-IP and reporter assays for Nrf2 interaction","pmids":["17765677","17920186"],"confidence":"High","gaps":["Whether Nrf2 repression is physiologically relevant in vivo was not tested","Mechanism of ESRRB-driven cell identity specification in inner ear was not resolved at the chromatin level"]},{"year":2008,"claim":"ESRRB was placed at the heart of the pluripotency network by showing it directly activates Oct4 transcription via ERRE sites and physically interacts with NANOG through DNA-binding domains; simultaneously, human genetic studies linked ESRRB loss-of-function mutations to DFNB35 hearing impairment.","evidence":"ChIP, reporter assays, Co-IP with domain mapping in ESCs; homozygosity mapping and mutation analysis in multiple families","pmids":["18957414","18179891"],"confidence":"High","gaps":["Upstream signals regulating ESRRB expression in ESCs were unknown","How mutations in distinct domains (DBD vs LBD) differentially affect function was not mechanistically resolved"]},{"year":2009,"claim":"ESRRB was demonstrated to be sufficient to replace Klf4 in somatic cell reprogramming to iPSCs, establishing it as a functional reprogramming factor and not merely a marker of pluripotency.","evidence":"Retroviral transduction of Esrrb with Oct4/Sox2 generating iPSCs with chimaera contribution","pmids":["19136965"],"confidence":"High","gaps":["Mechanism by which ESRRB accesses closed chromatin during reprogramming was unknown","Whether ESRRB functions as a pioneer factor was not yet addressed"]},{"year":2010,"claim":"ESRRB was shown to coordinate metabolic gene programs (ATP generation/consumption) essential for rod photoreceptor survival, with inverse agonists causing rapid degeneration rescued by constitutively active mutants, revealing a ligand-responsive metabolic function in post-mitotic neurons.","evidence":"Knockout, overexpression, pharmacological inverse agonists, and epistasis with Crx in mouse retina","pmids":["20534447"],"confidence":"High","gaps":["Identity of an endogenous ligand for ESRRB remained unresolved","Whether the metabolic role in photoreceptors generalizes to other ESRRB-expressing tissues was unknown"]},{"year":2012,"claim":"A burst of studies positioned ESRRB as the necessary and sufficient effector downstream of both the Gsk3/Tcf3 axis and Nanog, identified Ncoa3 as the co-activator bridging ESRRB to RNA Pol II, and defined Dax1 as a direct target and feedback repressor—mapping the core signaling and co-factor architecture of ESRRB in ESC self-renewal.","evidence":"Genetic epistasis, ChIP-seq, reciprocal Co-IP with domain mapping, microarray, knockout and overexpression in ESCs and EpiSCs","pmids":["23040478","23040477","23019124"],"confidence":"High","gaps":["Whether other co-activators or chromatin remodelers are involved was unknown","Structural basis of Ncoa3-ESRRB interaction was not determined"]},{"year":2013,"claim":"Co-motif discovery and functional studies showed that ESRRB and Sox2 co-bind a composite DNA element to regulate naive-specific genes, and detailed LXXLL-mediated Dax1-ESRRB interaction was mapped, refining the combinatorial logic at ESRRB-occupied regulatory elements.","evidence":"ChIP-seq co-motif analysis, domain mapping of LXXLL motifs, reporter assays, knockdown","pmids":["23169531","23508100"],"confidence":"Medium","gaps":["Whether Esrrb-Sox2 composite binding is required vs. redundant with individual binding was not resolved","Structural basis of LXXLL-mediated repression not determined"]},{"year":2015,"claim":"Mass spectrometry of the ESRRB interactome in trophoblast stem cells revealed cell-type-specific partners including the Integrator complex and histone demethylase Lsd1, and showed that ESRRB directly regulates TS-specific transcription factors Elf5 and Eomes downstream of Fgf signaling.","evidence":"IP-MS interactome, ChIP-seq, Fgf pathway manipulation in trophoblast stem cells","pmids":["26206133"],"confidence":"High","gaps":["Functional requirement for Lsd1 or Integrator in ESRRB-driven TS cell maintenance was not tested","Whether ESRRB recruits Lsd1 to specific loci was not shown"]},{"year":2016,"claim":"ESRRB was established as a mitotic bookmarking factor that remains dynamically bound to its DNA motif through cell division, ensuring rapid transcriptional re-activation of target genes in daughter cells—providing a mechanism for epigenetic memory of pluripotency through mitosis.","evidence":"Mitotic ChIP-seq, live-cell imaging, FRAP in ESCs","pmids":["27723719"],"confidence":"High","gaps":["Whether mitotic bookmarking is essential for self-renewal or dispensable was not genetically tested","Mechanism by which ESRRB resists mitotic chromatin compaction was unresolved"]},{"year":2017,"claim":"ESRRB was shown to activate oxidative phosphorylation during reprogramming to naive pluripotency, establishing that it directly programs metabolic state (not just transcription factor networks) as part of cell identity conversion.","evidence":"Seahorse metabolic flux analysis, overexpression during reprogramming","pmids":["28467928"],"confidence":"High","gaps":["Direct ESRRB target genes mediating OXPHOS activation were not fully characterized","Whether metabolic reprogramming is a cause or consequence of pluripotency acquisition was not disambiguated"]},{"year":2018,"claim":"Two studies resolved ESRRB's chromatin-level mechanisms: it acts as a pioneer factor that binds stable nucleosomes and hypermethylated DNA at silenced enhancers to recruit Oct4-Sox2-Nanog during reprogramming, and its downregulation during naive exit causes selective loss of NANOG and OCT4 occupancy at naive-specific regulatory elements.","evidence":"ATAC-seq, bisulfite sequencing, ChIP-seq time-course during EpiSC reprogramming; ChIP-seq in FACS-sorted Esrrb-positive vs -negative ESCs","pmids":["29910149","30275266"],"confidence":"High","gaps":["Whether ESRRB's pioneer activity requires specific co-factors or is intrinsic to its DBD was not determined","The relationship between pioneer binding and mitotic bookmarking was not explored"]},{"year":2019,"claim":"O-GlcNAcylation at S25 by OGT was identified as the first post-translational modification tuning ESRRB, stabilizing the protein and enhancing its interactions with OCT4 and NANOG; separately, ESRRB was shown to directly activate a Bmp4 enhancer in trophoblast stem cells to regulate primordial germ cell specification.","evidence":"Metabolic labeling, mass spectrometry, S25 mutagenesis, Co-IP in ESCs; ChIP-seq and CRISPR enhancer deletion at Bmp4 locus","pmids":["31492838","31315026"],"confidence":"High","gaps":["Whether O-GlcNAcylation affects pioneer or bookmarking activity was not tested","Whether other glycosylation sites exist on ESRRB was not exhaustively mapped"]},{"year":2021,"claim":"ESRRB and Nr5a2 were shown to jointly occupy regulatory elements and together control Oct4/Sox2/Nanog binding genome-wide; double knockout collapsed the pluripotency network, revealing functional redundancy that had masked ESRRB's full essentiality in earlier single-knockout studies.","evidence":"Double knockout ESCs, ChIP-seq, transcriptome analysis","pmids":["34397088"],"confidence":"High","gaps":["Whether Nr5a2 compensates for ESRRB at the pioneer/bookmarking level was not tested","Structural basis for Nr5a2 and ESRRB co-occupancy at the same elements was not resolved"]},{"year":2022,"claim":"Cell-cycle-resolved studies showed that ESRRB is upregulated during G2/M and drives extraembryonic endoderm differentiation in a cell-cycle-dependent manner; separately, ESRRB was found essential for gamma motor neuron functional properties, extending its post-mitotic roles beyond sensory cells to the motor system.","evidence":"Cell-cycle reporter with scRNA-seq, CRISPR KO and overexpression in ESCs; selective motor neuron knockout with electrophysiology","pmids":["35594859","36542664"],"confidence":"High","gaps":["How cell-cycle phase mechanistically alters ESRRB target selection was not determined","Direct transcriptional targets in gamma motor neurons were not fully defined"]},{"year":2023,"claim":"ESRRB was shown to be required for formative-state gene activation during the naive-to-formative epiblast transition, and in cervical cancer it activates SMAD7 to inhibit TGFβ signaling and forms a positive feedback loop with MYC, revealing context-dependent transcriptional programs beyond pluripotency maintenance.","evidence":"Genetic inactivation and gain-of-function in 3D organoid and PGCLC assays; CRISPR KO and rescue with xenograft in cancer cells","pmids":["37106060","37350664"],"confidence":"High","gaps":["Whether the ESRRB-SMAD7-MYC loop operates in normal development was not tested","How ESRRB transitions from naive to formative gene programs mechanistically was not resolved"]},{"year":2024,"claim":"Lactylation at K228/K232 was identified as a metabolite-responsive modification that enhances ESRRB binding to target genes and promotes both self-renewal and XEN differentiation, linking glycolytic metabolism to ESRRB chromatin function; ERK-mediated phosphorylation at S42/S43 was then shown to act as a binary switch redirecting ESRRB from pluripotency to XEN gene targets.","evidence":"Mass spectrometry, site-directed mutagenesis, ChIP-seq for lactylation; quantitative phosphoproteomics and phosphomutant ChIP-seq for ERK sites","pmids":["38473939","39919750"],"confidence":"High","gaps":["Whether lactylation and phosphorylation act combinatorially on the same ESRRB molecule was not tested","Structural mechanism by which phosphorylation alters DNA-binding specificity is unknown"]},{"year":2025,"claim":"ESRRB was found to co-opt ancient MIR SINE-derived enhancers for naive-specific gene expression, co-occupying these elements with YY1 and promoting enhancer-to-super-enhancer loop formation, revealing a transposable element exaptation mechanism for ESRRB-dependent regulatory architecture.","evidence":"Hi-C, H3K27ac HiChIP, CRISPR MIR enhancer deletion, ChIP-seq in naive ESCs","pmids":["40296153"],"confidence":"Medium","gaps":["Whether MIR enhancer co-option is species-specific or conserved across mammals was not tested","Functional significance of YY1 co-occupancy at MIR elements is not established beyond co-binding"]},{"year":null,"claim":"Key unresolved questions include whether ESRRB has an endogenous ligand, how its pioneer/bookmarking activities are coordinated or distinguished, the structural basis for phosphorylation-dependent target switching, and whether its diverse tissue-specific roles (ear, retina, motor neuron, trophoblast, ESC) share a common metabolic or chromatin-level mechanism.","evidence":"","pmids":[],"confidence":"Low","gaps":["No endogenous ligand identified despite pharmacological evidence of ligand responsiveness","No structural model of ESRRB bound to chromatin or co-factors","Integration of multiple PTM inputs on a single ESRRB molecule not assessed"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[3,11,14,16]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[3,5,7,8,9,10,13,15,16,17,27,28]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[2,10]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[3,14,16,19]},{"term_id":"GO:0005694","term_label":"chromosome","supporting_discovery_ids":[14]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[3,5,7,8,9,13,16,27,28]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[7,22,30]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,1,20,25,28]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[14,16,23]}],"complexes":[],"partners":["NANOG","NCOA3","DAX1","SOX2","NR5A2","EP300","OGT","YY1"],"other_free_text":[]},"mechanistic_narrative":"ESRRB is an orphan nuclear receptor that serves as a central transcriptional regulator of naive pluripotency, trophoblast development, and specialized post-mitotic cell identities in the inner ear, retina, and motor neurons. In embryonic stem cells, ESRRB operates downstream of Gsk3/Tcf3 and Nanog/LIF-Stat3 signaling to directly activate Oct4, Dax1, Gata6, Elf5, Eomes, and formative-state genes, cooperating with Nr5a2 and Sox2 at shared regulatory elements and recruiting co-activators Ncoa3 and p300; it also functions as a pioneer factor that binds methylated, nucleosome-occupied chromatin to recruit Oct4-Sox2-Nanog during reprogramming, and as a mitotic bookmarking factor that maintains regulatory element accessibility through cell division [PMID:23040478, PMID:23040477, PMID:29910149, PMID:27723719, PMID:34397088]. ESRRB activity is tuned by post-translational modifications—O-GlcNAcylation at S25 stabilizes the protein and enhances pluripotency factor interactions, lactylation at K228/K232 augments target-gene binding, and ERK phosphorylation at S42/S43 redirects binding from pluripotency to extraembryonic endoderm genes—establishing a phosphorylation-dependent switch between self-renewal and lineage commitment [PMID:31492838, PMID:38473939, PMID:39919750]. Loss-of-function mutations in ESRRB cause autosomal-recessive nonsyndromic hearing impairment DFNB35 [PMID:18179891]."},"prefetch_data":{"uniprot":{"accession":"O95718","full_name":"Steroid hormone receptor ERR2","aliases":["ERR beta-2","Estrogen receptor-like 2","Estrogen-related receptor beta","ERR-beta","Nuclear receptor subfamily 3 group B member 2"],"length_aa":433,"mass_kda":48.1,"function":"Transcription factor that binds a canonical ESRRB recognition (ERRE) sequence 5'TCAAGGTCA-3' localized on promoter and enhancer of targets genes regulating their expression or their transcription activity (PubMed:17920186, PubMed:19755138). Plays a role, in a LIF-independent manner, in maintainance of self-renewal and pluripotency of embryonic and trophoblast stem cells through different signaling pathways including FGF signaling pathway and Wnt signaling pathways. Involved in morula development (2-16 cells embryos) by acting as a regulator at the 8-cell stage (By similarity). Upon FGF signaling pathway activation, interacts with KDM1A by directly binding to enhancer site of ELF5 and EOMES and activating their transcription leading to self-renewal of trophoblast stem cells. Also regulates expression of multiple rod-specific genes and is required for survival of this cell type (By similarity). Plays a role as transcription factor activator of GATA6, NR0B1, POU5F1 and PERM1 (PubMed:23836911). Plays a role as transcription factor repressor of NFE2L2 transcriptional activity and ESR1 transcriptional activity (PubMed:17920186, PubMed:19755138). During mitosis remains bound to a subset of interphase target genes, including pluripotency regulators, through the canonical ESRRB recognition (ERRE) sequence, leading to their transcriptional activation in early G1 phase. Can coassemble on structured DNA elements with other transcription factors like SOX2, POU5F1, KDM1A and NCOA3 to trigger ESRRB-dependent gene activation. This mechanism, in the case of SOX2 corecruitment prevents the embryonic stem cells (ESCs) to epiblast stem cells (EpiSC) transition through positive regulation of NR0B1 that inhibits the EpiSC transcriptional program. Also plays a role inner ear development by controlling expression of ion channels and transporters and in early placentation (By similarity) Transcription factor that binds a canonical ESRRB recognition (ERRE) sequence 5'TCAAGGTCA-3' localized on promoter and enhancer of targets genes regulating their expression or their transcription activity. Positively regulates ESR1 transcriptional activity upon E2 stimulation","subcellular_location":"Nucleus; Cytoplasm; Chromosome","url":"https://www.uniprot.org/uniprotkb/O95718/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/ESRRB","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/ESRRB","total_profiled":1310},"omim":[{"mim_id":"616717","title":"TESTIS-EXPRESSED GENE 10; TEX10","url":"https://www.omim.org/entry/616717"},{"mim_id":"615921","title":"PPARGC1- AND ESRR-INDUCED REGULATOR, MUSCLE, 1; PERM1","url":"https://www.omim.org/entry/615921"},{"mim_id":"615621","title":"RETROELEMENT SILENCING FACTOR 1; RESF1","url":"https://www.omim.org/entry/615621"},{"mim_id":"612839","title":"TET METHYLCYTOSINE DIOXYGENASE 2; TET2","url":"https://www.omim.org/entry/612839"},{"mim_id":"610378","title":"GLIS FAMILY ZINC FINGER PROTEIN 1; GLIS1","url":"https://www.omim.org/entry/610378"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Group enriched","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"kidney","ntpm":15.2},{"tissue":"retina","ntpm":33.9}],"url":"https://www.proteinatlas.org/search/ESRRB"},"hgnc":{"alias_symbol":["ERR2","ERRbeta","NR3B2","ERRb"],"prev_symbol":["ESRL2","DFNB35"]},"alphafold":{"accession":"O95718","domains":[{"cath_id":"3.30.50.10","chopping":"113-173","consensus_level":"high","plddt":94.5979,"start":113,"end":173},{"cath_id":"1.10.565.10","chopping":"210-432","consensus_level":"high","plddt":94.1908,"start":210,"end":432}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O95718","model_url":"https://alphafold.ebi.ac.uk/files/AF-O95718-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O95718-F1-predicted_aligned_error_v6.png","plddt_mean":77.94},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ESRRB","jax_strain_url":"https://www.jax.org/strain/search?query=ESRRB"},"sequence":{"accession":"O95718","fasta_url":"https://rest.uniprot.org/uniprotkb/O95718.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O95718/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O95718"}},"corpus_meta":[{"pmid":"19136965","id":"PMC_19136965","title":"Reprogramming of fibroblasts into induced pluripotent stem cells with orphan nuclear receptor Esrrb.","date":"2009","source":"Nature cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/19136965","citation_count":359,"is_preprint":false},{"pmid":"9285590","id":"PMC_9285590","title":"Placental abnormalities in mouse embryos lacking the orphan nuclear receptor ERR-beta.","date":"1997","source":"Nature","url":"https://pubmed.ncbi.nlm.nih.gov/9285590","citation_count":340,"is_preprint":false},{"pmid":"23040478","id":"PMC_23040478","title":"Esrrb is a pivotal target of the Gsk3/Tcf3 axis regulating embryonic stem cell self-renewal.","date":"2012","source":"Cell stem cell","url":"https://pubmed.ncbi.nlm.nih.gov/23040478","citation_count":320,"is_preprint":false},{"pmid":"23040477","id":"PMC_23040477","title":"Esrrb is a direct Nanog target gene that can substitute for Nanog function in pluripotent cells.","date":"2012","source":"Cell stem cell","url":"https://pubmed.ncbi.nlm.nih.gov/23040477","citation_count":267,"is_preprint":false},{"pmid":"18957414","id":"PMC_18957414","title":"Esrrb activates Oct4 transcription and sustains self-renewal and pluripotency in embryonic stem cells.","date":"2008","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/18957414","citation_count":130,"is_preprint":false},{"pmid":"27723719","id":"PMC_27723719","title":"Mitotic binding of Esrrb marks key regulatory regions of the pluripotency network.","date":"2016","source":"Nature cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/27723719","citation_count":120,"is_preprint":false},{"pmid":"24693477","id":"PMC_24693477","title":"The expressions of stem cell markers: Oct4, Nanog, Sox2, nucleostemin, Bmi, Zfx, Tcl1, Tbx3, Dppa4, and Esrrb in bladder, colon, and prostate cancer, and certain cancer cell lines.","date":"2014","source":"Anatomy & cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/24693477","citation_count":120,"is_preprint":false},{"pmid":"31492838","id":"PMC_31492838","title":"Next-generation unnatural monosaccharides reveal that ESRRB O-GlcNAcylation regulates pluripotency of mouse embryonic stem cells.","date":"2019","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/31492838","citation_count":100,"is_preprint":false},{"pmid":"17765677","id":"PMC_17765677","title":"Estrogen-related receptor beta/NR3B2 controls epithelial cell fate and endolymph production by the stria vascularis.","date":"2007","source":"Developmental cell","url":"https://pubmed.ncbi.nlm.nih.gov/17765677","citation_count":98,"is_preprint":false},{"pmid":"15857113","id":"PMC_15857113","title":"Identification and structure-activity relationship of phenolic acyl hydrazones as selective agonists for the estrogen-related orphan nuclear receptors ERRbeta and ERRgamma.","date":"2005","source":"Journal of medicinal chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/15857113","citation_count":92,"is_preprint":false},{"pmid":"26206133","id":"PMC_26206133","title":"Fgf and Esrrb integrate epigenetic and transcriptional networks that regulate self-renewal of trophoblast stem cells.","date":"2015","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/26206133","citation_count":91,"is_preprint":false},{"pmid":"18179891","id":"PMC_18179891","title":"Mutations of ESRRB encoding estrogen-related receptor beta cause autosomal-recessive nonsyndromic hearing impairment DFNB35.","date":"2008","source":"American journal of human genetics","url":"https://pubmed.ncbi.nlm.nih.gov/18179891","citation_count":84,"is_preprint":false},{"pmid":"23019124","id":"PMC_23019124","title":"Ncoa3 functions as an essential Esrrb coactivator to sustain embryonic stem cell self-renewal and reprogramming.","date":"2012","source":"Genes & development","url":"https://pubmed.ncbi.nlm.nih.gov/23019124","citation_count":78,"is_preprint":false},{"pmid":"15003627","id":"PMC_15003627","title":"Loss of PGC-specific expression of the orphan nuclear receptor ERR-beta results in reduction of germ cell number in mouse embryos.","date":"2004","source":"Mechanisms of development","url":"https://pubmed.ncbi.nlm.nih.gov/15003627","citation_count":71,"is_preprint":false},{"pmid":"20534447","id":"PMC_20534447","title":"The orphan nuclear hormone receptor ERRbeta controls rod photoreceptor survival.","date":"2010","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/20534447","citation_count":70,"is_preprint":false},{"pmid":"28834535","id":"PMC_28834535","title":"Esrrb, an estrogen-related receptor involved in early development, pluripotency, and reprogramming.","date":"2017","source":"FEBS letters","url":"https://pubmed.ncbi.nlm.nih.gov/28834535","citation_count":66,"is_preprint":false},{"pmid":"29910149","id":"PMC_29910149","title":"Esrrb Unlocks Silenced Enhancers for Reprogramming to Naive Pluripotency.","date":"2018","source":"Cell stem cell","url":"https://pubmed.ncbi.nlm.nih.gov/29910149","citation_count":63,"is_preprint":false},{"pmid":"28467928","id":"PMC_28467928","title":"Hybrid Cellular Metabolism Coordinated by Zic3 and Esrrb Synergistically Enhances Induction of Naive Pluripotency.","date":"2017","source":"Cell metabolism","url":"https://pubmed.ncbi.nlm.nih.gov/28467928","citation_count":62,"is_preprint":false},{"pmid":"25219474","id":"PMC_25219474","title":"Significant association of full-thickness rotator cuff tears and estrogen-related receptor-β (ESRRB).","date":"2014","source":"Journal of shoulder and elbow surgery","url":"https://pubmed.ncbi.nlm.nih.gov/25219474","citation_count":48,"is_preprint":false},{"pmid":"33127892","id":"PMC_33127892","title":"Wnt/Beta-catenin/Esrrb signalling controls the tissue-scale reorganization and maintenance of the pluripotent lineage during murine embryonic diapause.","date":"2020","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/33127892","citation_count":48,"is_preprint":false},{"pmid":"17920186","id":"PMC_17920186","title":"ERRbeta: a potent inhibitor of Nrf2 transcriptional activity.","date":"2007","source":"Molecular and cellular endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/17920186","citation_count":46,"is_preprint":false},{"pmid":"24667650","id":"PMC_24667650","title":"ERRβ signalling through FST and BCAS2 inhibits cellular proliferation in breast cancer cells.","date":"2014","source":"British journal of cancer","url":"https://pubmed.ncbi.nlm.nih.gov/24667650","citation_count":41,"is_preprint":false},{"pmid":"29320730","id":"PMC_29320730","title":"Esrrb Complementation Rescues Development of Nanog-Null Germ Cells.","date":"2018","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/29320730","citation_count":40,"is_preprint":false},{"pmid":"20128821","id":"PMC_20128821","title":"Differential expression of estrogen-related receptors beta and gamma (ERRbeta and ERRgamma) and their clinical significance in human prostate cancer.","date":"2009","source":"Cancer science","url":"https://pubmed.ncbi.nlm.nih.gov/20128821","citation_count":33,"is_preprint":false},{"pmid":"27507929","id":"PMC_27507929","title":"Estrogen-related receptor β (ERRβ) - renaissance receptor or receptor renaissance?","date":"2016","source":"Nuclear receptor signaling","url":"https://pubmed.ncbi.nlm.nih.gov/27507929","citation_count":31,"is_preprint":false},{"pmid":"34397088","id":"PMC_34397088","title":"The combined action of Esrrb and Nr5a2 is essential for murine naïve pluripotency.","date":"2021","source":"Development (Cambridge, England)","url":"https://pubmed.ncbi.nlm.nih.gov/34397088","citation_count":31,"is_preprint":false},{"pmid":"23508100","id":"PMC_23508100","title":"Dax1 associates with Esrrb and regulates its function in embryonic stem cells.","date":"2013","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/23508100","citation_count":30,"is_preprint":false},{"pmid":"23169531","id":"PMC_23169531","title":"Co-motif discovery identifies an Esrrb-Sox2-DNA ternary complex as a mediator of transcriptional differences between mouse embryonic and epiblast stem cells.","date":"2013","source":"Stem cells (Dayton, Ohio)","url":"https://pubmed.ncbi.nlm.nih.gov/23169531","citation_count":30,"is_preprint":false},{"pmid":"32839427","id":"PMC_32839427","title":"NEDDylation negatively regulates ERRβ expression to promote breast cancer tumorigenesis and progression.","date":"2020","source":"Cell death & disease","url":"https://pubmed.ncbi.nlm.nih.gov/32839427","citation_count":28,"is_preprint":false},{"pmid":"9344655","id":"PMC_9344655","title":"Chromosomal mapping of the human and murine orphan receptors ERRalpha (ESRRA) and ERRbeta (ESRRB) and identification of a novel human ERRalpha-related pseudogene.","date":"1997","source":"Genomics","url":"https://pubmed.ncbi.nlm.nih.gov/9344655","citation_count":28,"is_preprint":false},{"pmid":"25023176","id":"PMC_25023176","title":"Role of estrogen related receptor beta (ESRRB) in DFN35B hearing impairment and dental decay.","date":"2014","source":"BMC medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/25023176","citation_count":25,"is_preprint":false},{"pmid":"37350664","id":"PMC_37350664","title":"ESRRB Inhibits the TGFβ Signaling Pathway to Drive Cell Proliferation in Cervical Cancer.","date":"2023","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/37350664","citation_count":24,"is_preprint":false},{"pmid":"37106060","id":"PMC_37106060","title":"Esrrb guides naive pluripotent cells through the formative transcriptional programme.","date":"2023","source":"Nature cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/37106060","citation_count":24,"is_preprint":false},{"pmid":"30275266","id":"PMC_30275266","title":"Esrrb extinction triggers dismantling of naïve pluripotency and marks commitment to differentiation.","date":"2018","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/30275266","citation_count":22,"is_preprint":false},{"pmid":"26584852","id":"PMC_26584852","title":"ESRRB polymorphisms are associated with comorbidity of temporomandibular disorders and rotator cuff disease.","date":"2015","source":"International journal of oral and maxillofacial surgery","url":"https://pubmed.ncbi.nlm.nih.gov/26584852","citation_count":21,"is_preprint":false},{"pmid":"21802533","id":"PMC_21802533","title":"A novel missense mutation in the ESRRB gene causes DFNB35 hearing loss in a Tunisian family.","date":"2011","source":"European journal of medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/21802533","citation_count":20,"is_preprint":false},{"pmid":"26523946","id":"PMC_26523946","title":"Combined Overexpression of JARID2, PRDM14, ESRRB, and SALL4A Dramatically Improves Efficiency and Kinetics of Reprogramming to Induced Pluripotent Stem Cells.","date":"2015","source":"Stem cells (Dayton, Ohio)","url":"https://pubmed.ncbi.nlm.nih.gov/26523946","citation_count":20,"is_preprint":false},{"pmid":"30299501","id":"PMC_30299501","title":"Esrrb plays important roles in maintaining self-renewal of trophoblast stem cells (TSCs) and reprogramming somatic cells to induced TSCs.","date":"2019","source":"Journal of molecular cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/30299501","citation_count":19,"is_preprint":false},{"pmid":"23064149","id":"PMC_23064149","title":"Pluripotency re-centered around Esrrb.","date":"2012","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/23064149","citation_count":19,"is_preprint":false},{"pmid":"35594859","id":"PMC_35594859","title":"Esrrb is a cell-cycle-dependent associated factor balancing pluripotency and XEN differentiation.","date":"2022","source":"Stem cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/35594859","citation_count":17,"is_preprint":false},{"pmid":"25496115","id":"PMC_25496115","title":"ERRβ splice variants differentially regulate cell cycle progression.","date":"2015","source":"Cell cycle (Georgetown, Tex.)","url":"https://pubmed.ncbi.nlm.nih.gov/25496115","citation_count":17,"is_preprint":false},{"pmid":"28189393","id":"PMC_28189393","title":"Identification of novel inverse agonists of estrogen-related receptors ERRγ and ERRβ.","date":"2017","source":"Bioorganic & medicinal chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/28189393","citation_count":16,"is_preprint":false},{"pmid":"32683181","id":"PMC_32683181","title":"Modulation of estrogen-related receptors subtype selectivity: Conversion of an ERRβ/γ selective agonist to ERRα/β/γ pan agonists.","date":"2020","source":"Bioorganic chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/32683181","citation_count":15,"is_preprint":false},{"pmid":"26627478","id":"PMC_26627478","title":"Messenger RNA profile analysis deciphers new Esrrb responsive genes in prostate cancer cells.","date":"2015","source":"BMC molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/26627478","citation_count":14,"is_preprint":false},{"pmid":"31315026","id":"PMC_31315026","title":"Esrrb function is required for proper primordial germ cell development in presomite stage mouse embryos.","date":"2019","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/31315026","citation_count":14,"is_preprint":false},{"pmid":"29129686","id":"PMC_29129686","title":"Naive-like ESRRB+ iPSCs with the Capacity for Rapid Neural Differentiation.","date":"2017","source":"Stem cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/29129686","citation_count":14,"is_preprint":false},{"pmid":"20923753","id":"PMC_20923753","title":"Expression of estrogen-related receptor beta (ERRβ) in human skin.","date":"2010","source":"European journal of dermatology : EJD","url":"https://pubmed.ncbi.nlm.nih.gov/20923753","citation_count":13,"is_preprint":false},{"pmid":"38473939","id":"PMC_38473939","title":"Glycolysis-Stimulated Esrrb Lactylation Promotes the Self-Renewal and Extraembryonic Endoderm Stem Cell Differentiation of Embryonic Stem Cells.","date":"2024","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/38473939","citation_count":12,"is_preprint":false},{"pmid":"31741180","id":"PMC_31741180","title":"The orphan nuclear receptor estrogen-related receptor beta (ERRβ) in triple-negative breast cancer.","date":"2019","source":"Breast cancer research and treatment","url":"https://pubmed.ncbi.nlm.nih.gov/31741180","citation_count":10,"is_preprint":false},{"pmid":"36542664","id":"PMC_36542664","title":"ERR2 and ERR3 promote the development of gamma motor neuron functional properties required for proprioceptive movement control.","date":"2022","source":"PLoS biology","url":"https://pubmed.ncbi.nlm.nih.gov/36542664","citation_count":10,"is_preprint":false},{"pmid":"22567352","id":"PMC_22567352","title":"A Novel ESRRB Deletion Is a Rare Cause of Autosomal Recessive Nonsyndromic Hearing Impairment among Pakistani Families.","date":"2011","source":"Genetics research international","url":"https://pubmed.ncbi.nlm.nih.gov/22567352","citation_count":10,"is_preprint":false},{"pmid":"34616727","id":"PMC_34616727","title":"ESRRB Facilitates the Conversion of Trophoblast-Like Stem Cells From Induced Pluripotent Stem Cells by Directly Regulating CDX2.","date":"2021","source":"Frontiers in cell and developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/34616727","citation_count":9,"is_preprint":false},{"pmid":"34971561","id":"PMC_34971561","title":"Differential repression of Otx2 underlies the capacity of NANOG and ESRRB to induce germline entry.","date":"2021","source":"Stem cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/34971561","citation_count":8,"is_preprint":false},{"pmid":"29212799","id":"PMC_29212799","title":"LIF-activated Jak signaling determines Esrrb expression during late-stage reprogramming.","date":"2018","source":"Biology open","url":"https://pubmed.ncbi.nlm.nih.gov/29212799","citation_count":8,"is_preprint":false},{"pmid":"28636277","id":"PMC_28636277","title":"ESRRB plays a crucial role in the promotion of porcine cell reprograming.","date":"2017","source":"Journal of cellular physiology","url":"https://pubmed.ncbi.nlm.nih.gov/28636277","citation_count":8,"is_preprint":false},{"pmid":"37633265","id":"PMC_37633265","title":"A bipartite function of ESRRB can integrate signaling over time to balance self-renewal and differentiation.","date":"2023","source":"Cell systems","url":"https://pubmed.ncbi.nlm.nih.gov/37633265","citation_count":8,"is_preprint":false},{"pmid":"22951369","id":"PMC_22951369","title":"DFNB35 due to a novel mutation in the ESRRB gene in a Czech consanguineous family.","date":"2012","source":"International journal of pediatric otorhinolaryngology","url":"https://pubmed.ncbi.nlm.nih.gov/22951369","citation_count":8,"is_preprint":false},{"pmid":"27601327","id":"PMC_27601327","title":"Esrrb directly binds to Gata6 promoter and regulates its expression with Dax1 and Ncoa3.","date":"2016","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/27601327","citation_count":8,"is_preprint":false},{"pmid":"33816475","id":"PMC_33816475","title":"An Esrrb and Nanog Cell Fate Regulatory Module Controlled by Feed Forward Loop Interactions.","date":"2021","source":"Frontiers in cell and developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/33816475","citation_count":6,"is_preprint":false},{"pmid":"36861367","id":"PMC_36861367","title":"Nilaparvata lugens ERR2 regulates moulting and ovary development is related to hormone signalling.","date":"2023","source":"Insect molecular biology","url":"https://pubmed.ncbi.nlm.nih.gov/36861367","citation_count":5,"is_preprint":false},{"pmid":"27822342","id":"PMC_27822342","title":"Characterization and genetic manipulation of primed stem cells into a functional naïve state with ESRRB.","date":"2016","source":"World journal of stem cells","url":"https://pubmed.ncbi.nlm.nih.gov/27822342","citation_count":5,"is_preprint":false},{"pmid":"25522312","id":"PMC_25522312","title":"Forced expression of Nanog or Esrrb preserves the ESC status in the absence of nucleostemin expression.","date":"2015","source":"Stem cells (Dayton, Ohio)","url":"https://pubmed.ncbi.nlm.nih.gov/25522312","citation_count":5,"is_preprint":false},{"pmid":"40296153","id":"PMC_40296153","title":"Rewiring of SINE-MIR enhancer topology and Esrrb modulation in expanded and naive pluripotency.","date":"2025","source":"Genome biology","url":"https://pubmed.ncbi.nlm.nih.gov/40296153","citation_count":4,"is_preprint":false},{"pmid":"37222961","id":"PMC_37222961","title":"Long Noncoding RNA ACTA2-AS1 Inhibits Cell Growth and Facilitates Apoptosis in Gastric Cancer by Binding with miR-6720-5p to Regulate ESRRB.","date":"2023","source":"Biochemical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/37222961","citation_count":4,"is_preprint":false},{"pmid":"40014986","id":"PMC_40014986","title":"Tetramethyl bisphenol F exposure induces human ovarian granulosa cell senescence and mouse ovarian damage by regulating ESRRB signalling.","date":"2025","source":"Ecotoxicology and environmental safety","url":"https://pubmed.ncbi.nlm.nih.gov/40014986","citation_count":3,"is_preprint":false},{"pmid":"39261511","id":"PMC_39261511","title":"Functional pathogenicity of ESRRB variant of uncertain significance contributes to hearing loss (DFNB35).","date":"2024","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/39261511","citation_count":3,"is_preprint":false},{"pmid":"35101039","id":"PMC_35101039","title":"A novel missense variant in ESRRB gene causing autosomal recessive non-syndromic hearing loss: in silico analysis of a case.","date":"2022","source":"BMC medical genomics","url":"https://pubmed.ncbi.nlm.nih.gov/35101039","citation_count":3,"is_preprint":false},{"pmid":"34023782","id":"PMC_34023782","title":"Oocyte-specific linker histone H1foo interacts with Esrrb to induce chromatin decondensation at specific gene loci.","date":"2021","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/34023782","citation_count":2,"is_preprint":false},{"pmid":"35652095","id":"PMC_35652095","title":"Esrrb Regulates Specific Feed-Forward Loops to Transit From Pluripotency Into Early Stages of Differentiation.","date":"2022","source":"Frontiers in cell and developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/35652095","citation_count":2,"is_preprint":false},{"pmid":"39919750","id":"PMC_39919750","title":"ERK phosphorylates ESRRB to regulate the self-renewal and differentiation of mouse embryonic stem cells.","date":"2025","source":"Stem cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/39919750","citation_count":1,"is_preprint":false},{"pmid":"26663459","id":"PMC_26663459","title":"Esrrb-Cre excises loxP-flanked alleles in early four-cell embryos.","date":"2015","source":"Genesis (New York, N.Y. : 2000)","url":"https://pubmed.ncbi.nlm.nih.gov/26663459","citation_count":1,"is_preprint":false},{"pmid":"26380406","id":"PMC_26380406","title":"[Cloning and regulation of pig estrogen related receptor β gene (ESRRB) promoter].","date":"2015","source":"Sheng wu gong cheng xue bao = Chinese journal of biotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/26380406","citation_count":1,"is_preprint":false},{"pmid":"41429340","id":"PMC_41429340","title":"Multi-omics analysis of early reperfused ischemic heart reveals ERRβ/γ activation protects against acute myocardial infarction injury.","date":"2025","source":"Journal of advanced research","url":"https://pubmed.ncbi.nlm.nih.gov/41429340","citation_count":0,"is_preprint":false},{"pmid":"41516107","id":"PMC_41516107","title":"Calcium and Cadmium Activate ESRRB to Mediate Cell Stemness and Pluripotency.","date":"2025","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/41516107","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2024.06.20.599879","title":"Identification of key genes and signaling pathway in the pathogenesis of Huntington's disease via bioinformatics and next generation sequencing data analysis","date":"2024-06-25","source":"bioRxiv","url":"https://doi.org/10.1101/2024.06.20.599879","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.05.27.596047","title":"Molecular and epistatic interactions between pioneer transcription factors shape nucleosome dynamics and cell differentiation","date":"2024-05-27","source":"bioRxiv","url":"https://doi.org/10.1101/2024.05.27.596047","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.10.11.617774","title":"Identifying sexually dimorphic circulating microRNAs in gonochoristic and hermaphroditic marine fish species","date":"2024-10-11","source":"bioRxiv","url":"https://doi.org/10.1101/2024.10.11.617774","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":34928,"output_tokens":7875,"usd":0.111454},"stage2":{"model":"claude-opus-4-6","input_tokens":11672,"output_tokens":4487,"usd":0.255802},"total_usd":0.367256,"stage1_batch_id":"msgbatch_0118RScg3WGaGkaZRtWZbtce","stage2_batch_id":"msgbatch_01Cpfzvtbj42aqp5oYZ5Te2s","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1997,\n      \"finding\": \"Targeted disruption of Esrrb in mice causes severely impaired placental formation with overabundance of trophoblast giant cells and deficiency of diploid trophoblast, and this phenotype is rescued by aggregation with tetraploid wild-type cells contributing exclusively to extra-embryonic tissues, establishing Esrrb's cell-autonomous role in chorion/trophoblast development.\",\n      \"method\": \"Targeted gene disruption (knockout mouse), tetraploid rescue experiment\",\n      \"journal\": \"Nature\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — clean knockout with defined cellular phenotype, genetic rescue by tetraploid complementation, foundational paper with 340 citations\",\n      \"pmids\": [\"9285590\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"ERRβ (Esrrb) controls the cell fate and gene expression of endolymph-producing epithelial cells (strial marginal cells and vestibular dark cells) in the inner ear; loss of Nr3b2 causes failure to express ion channel/transporter genes and partial transformation toward adjacent Pendrin-expressing epithelial fate, with secondary loss of underlying intermediate cells and strial capillaries.\",\n      \"method\": \"Nr3b2 knockout mouse, transcriptome comparison, genetically mosaic mice\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined cellular and molecular phenotypes, mosaic analysis adds cell-autonomy evidence\",\n      \"pmids\": [\"17765677\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Short-form human ERRβ (SFhERRbeta) physically interacts with Nrf2 (not by competing for ARE DNA-binding sites) and potently represses Nrf2 transcriptional activity on antioxidant response element-mediated gene expression; SFhERRbeta also alters the subcellular localization of Nrf2, and deletion mapping showed interaction through multiple sites of SFhERRbeta.\",\n      \"method\": \"Co-immunoprecipitation, confocal immunofluorescence, deletion mutant analysis, reporter assays\",\n      \"journal\": \"Molecular and cellular endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP plus functional reporter assay in single lab, localization data included\",\n      \"pmids\": [\"17920186\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"ESRRB binds two ERRE sites in the proximal 5'-UTR of the mouse Oct4 gene to activate its transcription; ESRRB physically interacts with NANOG through their DNA-binding domains, and this interaction reciprocally modulates their transcriptional activities to maintain ESC pluripotency.\",\n      \"method\": \"Reporter assay, ChIP, co-immunoprecipitation, domain mapping, stable transfection\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods (ChIP, Co-IP, domain mapping, reporter), single lab but strong mechanistic follow-up\",\n      \"pmids\": [\"18957414\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Loss-of-function mutations in ESRRB (frameshift, missense in DNA-binding domain at p.A110V, and ligand-binding domain at p.L320P, p.V342L, p.L347P) cause autosomal-recessive nonsyndromic hearing impairment DFNB35; molecular modeling indicates mutations affect structure/stability of DNA-binding and ligand-binding domains.\",\n      \"method\": \"Homozygosity mapping, mutation analysis, molecular modeling, RNA in situ hybridization, immunohistochemistry\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic loss-of-function with defined phenotype, domain-specific mutations replicated in multiple families across populations\",\n      \"pmids\": [\"18179891\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Esrrb functions in conjunction with Oct4 and Sox2 to mediate reprogramming of mouse embryonic fibroblasts to induced pluripotent stem cells, and Esrrb targets many genes involved in self-renewal and pluripotency in ES cells, enabling reprogramming without exogenous Klf transcription factors.\",\n      \"method\": \"Retroviral transduction, iPSC generation, expression and epigenetic profiling, in vivo differentiation, chimaera formation\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct gain-of-function in reprogramming with multiple functional readouts; 359 citations, widely replicated\",\n      \"pmids\": [\"19136965\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"ERRβ overexpression in retina induces rod-specific gene expression; ERRβ mutation causes rod photoreceptor dysfunction and degeneration; inverse agonists of ERRβ trigger rapid rod degeneration rescued by constitutively active ERRβ mutants; ERRβ coordinates expression of genes rate-limiting for ATP generation and consumption in photoreceptors; ERRβ activity rescues Crx loss-of-function photoreceptor defects.\",\n      \"method\": \"Overexpression in wild-type and Nrl-/- retinas, knockout mouse, pharmacological inverse agonists, constitutively active mutants, epistasis with Crx\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple complementary loss-of-function and gain-of-function approaches with defined molecular and cellular phenotypes\",\n      \"pmids\": [\"20534447\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Esrrb is a direct target of Tcf3 repression downstream of Gsk3 inhibition in ESCs; Esrrb knockdown/knockout eliminates response to Gsk3 inhibition and causes loss of pluripotency, while forced Esrrb expression phenocopies Gsk3 inhibition or Tcf3 deletion by sustaining self-renewal, placing Esrrb as necessary and sufficient downstream of the Gsk3/Tcf3 axis.\",\n      \"method\": \"Genome localization (ChIP-seq), transcriptome analysis, knockdown, knockout, forced expression, functional colony-forming assays\",\n      \"journal\": \"Cell stem cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis with multiple orthogonal approaches, 320 citations\",\n      \"pmids\": [\"23040478\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Nanog directly binds the Esrrb locus, enhances RNA Pol II binding, and stimulates Esrrb transcription; Esrrb overexpression maintains LIF-independent self-renewal in Nanog-/- ESCs and can reprogram Nanog-/- EpiSCs; Esrrb deletion abolishes Nanog's ability to confer LIF-independent self-renewal, placing Esrrb functionally downstream of Nanog.\",\n      \"method\": \"ChIP-seq, inducible Nanog protein systems, Nanog-/- ESCs, overexpression, rescue assays\",\n      \"journal\": \"Cell stem cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct ChIP evidence of Nanog binding Esrrb locus, combined with genetic rescue experiments, 267 citations\",\n      \"pmids\": [\"23040477\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Ncoa3 interacts with Esrrb via Esrrb's ligand-binding domain and bridges Esrrb to RNA polymerase II complexes; Ncoa3 is required for Esrrb function in ESC self-renewal and reprogramming; Ncoa3 shares overlapping gene regulatory functions with Esrrb and cooperates genome-wide with Oct4-Sox2-Nanog circuitry at active enhancers.\",\n      \"method\": \"Co-immunoprecipitation, domain mapping, ChIP-seq, microarray, knockdown, overexpression\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal Co-IP with domain mapping, ChIP-seq, and functional knockdown with defined phenotype, all in single lab\",\n      \"pmids\": [\"23019124\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Dax1 physically interacts with Esrrb through its LXXLL motifs (binding the activation- and ligand-binding domains of Esrrb) and represses Esrrb transcriptional activity; Esrrb directly binds the Dax1 promoter via ERRE1 to activate Dax1 expression independently of Oct3/4; Oct3/4, Dax1, and Esrrb show competitive inhibition among complexes, forming a regulatory loop for pluripotency.\",\n      \"method\": \"Co-immunoprecipitation, domain mapping (LXXLL motif), reporter assay, ChIP, gain-of-function/loss-of-function\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal interaction mapped to specific domains, combined with direct promoter binding by ChIP and functional reporter assays\",\n      \"pmids\": [\"23508100\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Esrrb and Sox2 co-bind a constrained composite DNA motif (Esrrb-Sox motif, 2–8 bp gap) in ESCs as identified by genome-wide ChIP-seq co-motif discovery; the Esrrb-Sox2 complex regulates genes (e.g., Klf4, Klf5, Nr0b1) that distinguish ESCs from epiblast stem cells.\",\n      \"method\": \"ChIP-seq, co-motif discovery algorithm (fexcom), knockdown experiments\",\n      \"journal\": \"Stem cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — genome-wide co-binding identified computationally and validated by knockdown, single lab\",\n      \"pmids\": [\"23169531\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"ERRβ overexpression in breast cancer cells activates FST (Follistatin) and BCAS2 transcription via direct binding (identified by ChIP cloning and gel supershift); ERRβ physically interacts with ERα (Co-IP); ERRβ-mediated BCAS2 upregulation inhibits FST transcription through downregulation of β-catenin/TCF4 recruitment to the FST promoter, and FST promotes apoptosis/E-cadherin expression while BCAS2 downregulates cyclin D1 to block G1/S transition.\",\n      \"method\": \"ChIP cloning, gel supershift assay, Co-immunoprecipitation, western blot, confocal microscopy, qRT-PCR\",\n      \"journal\": \"British journal of cancer\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — direct ChIP identification of target genes with Co-IP for protein interaction; single lab\",\n      \"pmids\": [\"24667650\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"In trophoblast stem (TS) cells, Esrrb is a downstream target of Fgf signalling; Esrrb directly binds and regulates TS cell-specific transcription factors Elf5 and Eomes; Esrrb interactome in TS cells (by mass spectrometry) includes the histone demethylase Lsd1 and the RNA Polymerase II-associated Integrator complex, distinct from its ES cell interactome.\",\n      \"method\": \"ChIP-seq, mass spectrometry interactome, loss-of-function, gain-of-function, Fgf signaling manipulation\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — MS-defined interactome combined with ChIP-seq and functional assays; multiple orthogonal methods\",\n      \"pmids\": [\"26206133\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Esrrb remains dynamically bound to key regulatory regions during mitosis in pluripotent ESCs (mitotic bookmarking); mitotic Esrrb binding is driven by specific recognition of its DNA-binding motif and is associated with early transcriptional re-activation of target genes after mitosis completion.\",\n      \"method\": \"Live-cell imaging, ChIP-seq during mitosis, FRAP, motif analysis\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct mitotic chromatin binding established by ChIP-seq with motif validation and functional link to gene re-activation; 120 citations\",\n      \"pmids\": [\"27723719\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Esrrb directly binds the Gata6 promoter at ERRE2 to activate Gata6 expression; this activity is repressed by Dax1 (which associates with Esrrb bound to ERRE2 but does not itself bind ERRE2) and enhanced by Ncoa3; Dax1 also associates with Ncoa3 to repress Ncoa3 transcriptional activity, maintaining ES cell undifferentiated state.\",\n      \"method\": \"Biotin DNA pulldown, ChIP, reporter assay, overexpression, co-immunoprecipitation\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — direct DNA binding confirmed by pulldown and ChIP, protein interactions confirmed by Co-IP, single lab\",\n      \"pmids\": [\"27601327\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Esrrb acts as a pioneer factor in reprogramming of epiblast stem cells to naive pluripotency by binding to silenced enhancers containing stable nucleosomes and hypermethylated DNA that are inaccessible to Oct4, Sox2, Nanog; Esrrb binding is accompanied by local loss of DNA methylation, LIF-dependent p300 engagement, and nucleosome displacement, leading to recruitment of core pluripotency factors within ~2 days.\",\n      \"method\": \"ATAC-seq, bisulfite sequencing, ChIP-seq, time-course reprogramming assays\",\n      \"journal\": \"Cell stem cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal epigenomic methods defining sequential mechanistic steps; 63 citations\",\n      \"pmids\": [\"29910149\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Esrrb activates oxidative phosphorylation (OXPHOS) during reprogramming while Zic3 represses it; the combined action of Esrrb (OXPHOS activation) and Zic3 (glycolysis activation) achieves a hybrid energy metabolism (glycolysis + OXPHOS) required for efficient naive pluripotency induction; Esrrb-mediated OXPHOS activation is also critical for conversion of primed PSCs to the naive state.\",\n      \"method\": \"Overexpression, metabolic flux analysis, seahorse assay, reprogramming efficiency assays\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — direct metabolic measurements combined with gain/loss-of-function assays defining specific pathway roles\",\n      \"pmids\": [\"28467928\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Esrrb downregulation in Nanog-low ESCs triggers loss of NANOG and OCT4 binding at Class I regulatory elements associated with naive-specific genes, while Class II elements retain OCT4 but lose NANOG binding, demonstrating that Esrrb level determines the chromatin occupancy of core pluripotency TFs and restricts potency during naive pluripotency exit.\",\n      \"method\": \"Fluorescent reporter lines, FACS sorting, ChIP-seq in Esrrb-positive vs Esrrb-negative cells\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — ChIP-seq in purified cell populations with defined TF occupancy changes linked to functional potency differences\",\n      \"pmids\": [\"30275266\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"ESRRB is O-GlcNAcylated by O-GlcNAc transferase (OGT) at serine 25; this modification stabilizes ESRRB protein, promotes its transcriptional activity, and facilitates its interactions with OCT4 and NANOG, thereby supporting mESC self-renewal and pluripotency.\",\n      \"method\": \"Metabolic labeling with azido-sugar reporters, mass spectrometry, site-directed mutagenesis (S25 mutation), Co-immunoprecipitation, transcriptional activity assays\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — site-specific PTM identified by MS and confirmed by mutagenesis, writer identified (OGT), functional consequences measured by Co-IP and activity assays\",\n      \"pmids\": [\"31492838\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"In trophoblast stem cells, Esrrb directly binds an enhancer at the Bmp4 locus (identified by ChIP-seq and luciferase reporter assay) and activates Bmp4 expression in the extraembryonic ectoderm; loss of this enhancer (CRISPR deletion) or Esrrb itself reduces Bmp4 expression and primordial germ cell numbers.\",\n      \"method\": \"ChIP-seq, luciferase reporter assay, CRISPR/Cas9 enhancer deletion, microarray, PGC counting\",\n      \"journal\": \"Developmental biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — enhancer identified by ChIP-seq, validated by reporter assay, causally confirmed by CRISPR deletion of the enhancer in vivo\",\n      \"pmids\": [\"31315026\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"ERRβ protein is targeted for proteasomal degradation by the SCF E3 ubiquitin ligase complex activated by NEDDylation; inhibition of NEDDylation with MLN4924 restores ERRβ expression in breast cancer cells, reduces proliferation and migration, and ERRβ recruits the co-activator p300 to target gene promoters (p21Cip1/Waf1, E-cadherin) to upregulate their expression.\",\n      \"method\": \"In vitro and in vivo degradation assays, MLN4924 inhibitor, ChIP (p300 recruitment), western blot, cell proliferation/migration assays\",\n      \"journal\": \"Cell death & disease\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — biochemical degradation pathway identified with inhibitor validation; p300 recruitment by ChIP; single lab\",\n      \"pmids\": [\"32839427\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The canonical Wnt/β-catenin pathway signals through Esrrb as its central downstream factor to regulate tissue-scale organization (morphogenesis and maintenance) of the murine pluripotent epiblast during diapause; autocrine Wnt activity controls epiblast architecture when development is paused.\",\n      \"method\": \"3D in vitro model of epiblast development, Wnt pathway manipulation, Esrrb conditional knockout, live imaging\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis in 3D model with in vivo diapause context; single lab\",\n      \"pmids\": [\"33127892\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Oocyte-specific linker histone H1foo physically interacts with Esrrb; Esrrb is necessary for H1foo-dependent chromatin decondensation at specific target loci (oocyte-specific genes), as shown by ChIP-seq of H1foo-overexpressing ESCs and endogenous H1foo in oocytes.\",\n      \"method\": \"ChIP-seq, Co-immunoprecipitation, overexpression, chromatin accessibility analysis\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP plus ChIP-seq establishing functional requirement of Esrrb for H1foo chromatin activity; single lab\",\n      \"pmids\": [\"34023782\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Esrrb and Nr5a2 conjointly occupy a large common set of regulatory elements in naive mouse ESCs and together control binding of Oct4, Sox2, and Nanog to DNA; double knockout of Esrrb and Nr5a2 collapses the pluripotency network and causes ESC differentiation, paralleling the requirement for Oct4 and Sox2.\",\n      \"method\": \"Single and double knockout, ChIP-seq, transcriptome analysis\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic epistasis by double KO combined with genome-wide TF occupancy changes, clear phenotype\",\n      \"pmids\": [\"34397088\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"ERR2 (Esrrb/ERRβ) and ERR3 (ERRγ) are required in motor neurons for gamma motor neuron functional properties (low firing thresholds, high firing rates) necessary for muscle proprioception and movement control; gain-of-function in chick suggests ERR2/3 operate via transcriptional activation of neural activity modulators.\",\n      \"method\": \"Selective motor neuron knockout, electrophysiology, gain-of-function in chick, transcriptomics\",\n      \"journal\": \"PLoS biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — selective KO with electrophysiological phenotype and complementary gain-of-function; rigorously defined cellular phenotype\",\n      \"pmids\": [\"36542664\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Esrrb is upregulated during G2/M phase of the cell cycle and drives extraembryonic endoderm (XEN) differentiation in a cell-cycle-dependent manner; ESRRB knockout ESCs lose the potential to differentiate into XEN, and G1 cells forced to overexpress Esrrb acquire XEN differentiation capacity; ESRRB associates with XEN-poised enhancers.\",\n      \"method\": \"Cell-cycle reporter system, scRNA-seq, CRISPR knockout, overexpression, ATAC-seq/ChIP-seq on WT vs KO ESCs\",\n      \"journal\": \"Stem cell reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — cell-cycle-resolved loss/gain-of-function with chromatin enhancer association; single lab\",\n      \"pmids\": [\"35594859\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ESRRB activates transcription of SMAD7 (a TGFβ pathway inhibitor) in cervical cancer cells, blocking phosphorylation and nuclear translocation of SMAD2/3, thereby downregulating CDKN1A and upregulating CCNA2 and MYC; MYC in turn transactivates ESRRB and upregulates SMAD7, forming a positive feedback loop that promotes cell-cycle progression.\",\n      \"method\": \"CRISPR/Cas9 knockout, ectopic expression, reporter assays, western blot for pSMAD2/3, cell-cycle analysis, xenograft tumor model\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — CRISPR KO and rescue with defined molecular pathway (SMAD7/TGFβ), multiple orthogonal readouts, in vivo validation\",\n      \"pmids\": [\"37350664\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ESRRB is required and sufficient to activate formative gene expression programs in naive-to-formative epiblast transition; Esrrb genetic inactivation leads to illegitimate mesendoderm/extra-embryonic marker expression, impaired formative transcription, failure to self-organize in 3D, and impaired primordial germ cell generation; ESRRB occupies key formative gene loci in naive cells and throughout the formative state.\",\n      \"method\": \"Genetic inactivation, gain-of-function, 3D organoid self-organization assay, ChIP-seq, transcriptome analysis, PGCLC differentiation assay\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — combined loss- and gain-of-function with genome-wide occupancy, 3D functional assay, and developmental phenotypes\",\n      \"pmids\": [\"37106060\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ESRRB is lactylated on K228 and K232 in response to intracellular lactate (linked to glycolysis); lactylation enhances ESRRB activity in promoting ESC self-renewal (in absence of LIF) and XEN differentiation by increasing its binding at target genes.\",\n      \"method\": \"Mass spectrometry, site-directed mutagenesis (K228/K232), ChIP-seq, functional self-renewal and differentiation assays\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1-2 — site-specific PTM identified by MS, confirmed by mutagenesis, linked to target gene binding by ChIP-seq; single lab\",\n      \"pmids\": [\"38473939\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ERK phosphorylates ESRRB at Serine 42 and Serine 43; dephosphorylated ESRRB (mimicking MEK inhibition) shows enhanced binding to pluripotency genes and promotes self-renewal, while phosphorylated ESRRB shows increased binding to extraembryonic endoderm (XEN) genes and promotes XEN differentiation.\",\n      \"method\": \"Quantitative phosphoproteomics, site-directed mutagenesis (S42A/S43A phosphomutants), ChIP-seq, functional differentiation assays\",\n      \"journal\": \"Stem cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — kinase-substrate relationship confirmed by phosphoproteomics + mutagenesis, with ChIP-seq showing altered DNA binding at distinct gene sets\",\n      \"pmids\": [\"39919750\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"In naïve ESCs, ESRRB co-opts MIR (mammalian-wide interspersed repeat) SINE-derived enhancers for naïve-specific gene expression; ESRRB binding to MIR enhancers promotes formation of enhancer-to-super-enhancer loops regulating pluripotency genes; ESRRB co-occupies MIR elements with the structural protein YY1; loss of an ESRRB-bound MIR enhancer impairs self-renewal.\",\n      \"method\": \"Hi-C, H3K27ac HiChIP, CRISPR-guided TE proteomics, CRISPR MIR enhancer deletion, ChIP-seq\",\n      \"journal\": \"Genome biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — genome-wide 3D chromatin + CRISPR deletion establishes functional enhancer; Co-occupancy with YY1 by ChIP-seq; single lab\",\n      \"pmids\": [\"40296153\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ESRRB is an orphan nuclear receptor that functions as a sequence-specific transcription factor and pioneer factor at the hub of the naive pluripotency network: it is activated downstream of Gsk3 inhibition/Wnt-β-catenin/Tcf3 and Nanog/LIF-Jak-Stat3 signaling, directly binds and activates Oct4, Dax1, Bmp4, Gata6, Elf5, Eomes, and formative gene loci, recruits co-activators Ncoa3 and p300 and interacts with the Integrator complex and histone demethylase Lsd1, acts as a mitotic bookmarking factor to maintain regulatory element accessibility through cell division, drives reprogramming by pioneering closed/methylated chromatin to recruit Oct4-Sox2-Nanog, and has its activity fine-tuned by post-translational modifications including O-GlcNAcylation (OGT at S25, stabilizing and activating), lactylation (K228/K232, enhancing target binding), and ERK phosphorylation (S42/S43, redirecting binding from pluripotency to XEN genes); loss-of-function causes placental failure, inner ear degeneration (DFNB35 hearing loss), rod photoreceptor degeneration, loss of gamma motor neuron functional properties, and collapse of naive pluripotency.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"ESRRB is an orphan nuclear receptor that serves as a central transcriptional regulator of naive pluripotency, trophoblast development, and specialized post-mitotic cell identities in the inner ear, retina, and motor neurons. In embryonic stem cells, ESRRB operates downstream of Gsk3/Tcf3 and Nanog/LIF-Stat3 signaling to directly activate Oct4, Dax1, Gata6, Elf5, Eomes, and formative-state genes, cooperating with Nr5a2 and Sox2 at shared regulatory elements and recruiting co-activators Ncoa3 and p300; it also functions as a pioneer factor that binds methylated, nucleosome-occupied chromatin to recruit Oct4-Sox2-Nanog during reprogramming, and as a mitotic bookmarking factor that maintains regulatory element accessibility through cell division [PMID:23040478, PMID:23040477, PMID:29910149, PMID:27723719, PMID:34397088]. ESRRB activity is tuned by post-translational modifications—O-GlcNAcylation at S25 stabilizes the protein and enhances pluripotency factor interactions, lactylation at K228/K232 augments target-gene binding, and ERK phosphorylation at S42/S43 redirects binding from pluripotency to extraembryonic endoderm genes—establishing a phosphorylation-dependent switch between self-renewal and lineage commitment [PMID:31492838, PMID:38473939, PMID:39919750]. Loss-of-function mutations in ESRRB cause autosomal-recessive nonsyndromic hearing impairment DFNB35 [PMID:18179891].\",\n  \"teleology\": [\n    {\n      \"year\": 1997,\n      \"claim\": \"The first loss-of-function study established that ESRRB is cell-autonomously required for chorion/trophoblast development, revealing its essential role in extraembryonic tissue formation.\",\n      \"evidence\": \"Targeted knockout mouse with tetraploid rescue demonstrating placental-restricted phenotype\",\n      \"pmids\": [\"9285590\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream transcriptional targets in trophoblast were unknown\", \"Whether ESRRB has embryonic (non-extraembryonic) roles was unresolved\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Beyond placenta, ESRRB was shown to control cell fate in the inner ear (strial marginal cells) and to physically interact with Nrf2 to repress antioxidant response element-mediated transcription, broadening its known tissue repertoire and revealing a protein-interaction-based repressive mechanism.\",\n      \"evidence\": \"Inner ear knockout with transcriptomic and mosaic analysis; Co-IP and reporter assays for Nrf2 interaction\",\n      \"pmids\": [\"17765677\", \"17920186\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Nrf2 repression is physiologically relevant in vivo was not tested\", \"Mechanism of ESRRB-driven cell identity specification in inner ear was not resolved at the chromatin level\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"ESRRB was placed at the heart of the pluripotency network by showing it directly activates Oct4 transcription via ERRE sites and physically interacts with NANOG through DNA-binding domains; simultaneously, human genetic studies linked ESRRB loss-of-function mutations to DFNB35 hearing impairment.\",\n      \"evidence\": \"ChIP, reporter assays, Co-IP with domain mapping in ESCs; homozygosity mapping and mutation analysis in multiple families\",\n      \"pmids\": [\"18957414\", \"18179891\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Upstream signals regulating ESRRB expression in ESCs were unknown\", \"How mutations in distinct domains (DBD vs LBD) differentially affect function was not mechanistically resolved\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"ESRRB was demonstrated to be sufficient to replace Klf4 in somatic cell reprogramming to iPSCs, establishing it as a functional reprogramming factor and not merely a marker of pluripotency.\",\n      \"evidence\": \"Retroviral transduction of Esrrb with Oct4/Sox2 generating iPSCs with chimaera contribution\",\n      \"pmids\": [\"19136965\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which ESRRB accesses closed chromatin during reprogramming was unknown\", \"Whether ESRRB functions as a pioneer factor was not yet addressed\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"ESRRB was shown to coordinate metabolic gene programs (ATP generation/consumption) essential for rod photoreceptor survival, with inverse agonists causing rapid degeneration rescued by constitutively active mutants, revealing a ligand-responsive metabolic function in post-mitotic neurons.\",\n      \"evidence\": \"Knockout, overexpression, pharmacological inverse agonists, and epistasis with Crx in mouse retina\",\n      \"pmids\": [\"20534447\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of an endogenous ligand for ESRRB remained unresolved\", \"Whether the metabolic role in photoreceptors generalizes to other ESRRB-expressing tissues was unknown\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"A burst of studies positioned ESRRB as the necessary and sufficient effector downstream of both the Gsk3/Tcf3 axis and Nanog, identified Ncoa3 as the co-activator bridging ESRRB to RNA Pol II, and defined Dax1 as a direct target and feedback repressor—mapping the core signaling and co-factor architecture of ESRRB in ESC self-renewal.\",\n      \"evidence\": \"Genetic epistasis, ChIP-seq, reciprocal Co-IP with domain mapping, microarray, knockout and overexpression in ESCs and EpiSCs\",\n      \"pmids\": [\"23040478\", \"23040477\", \"23019124\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether other co-activators or chromatin remodelers are involved was unknown\", \"Structural basis of Ncoa3-ESRRB interaction was not determined\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Co-motif discovery and functional studies showed that ESRRB and Sox2 co-bind a composite DNA element to regulate naive-specific genes, and detailed LXXLL-mediated Dax1-ESRRB interaction was mapped, refining the combinatorial logic at ESRRB-occupied regulatory elements.\",\n      \"evidence\": \"ChIP-seq co-motif analysis, domain mapping of LXXLL motifs, reporter assays, knockdown\",\n      \"pmids\": [\"23169531\", \"23508100\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether Esrrb-Sox2 composite binding is required vs. redundant with individual binding was not resolved\", \"Structural basis of LXXLL-mediated repression not determined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Mass spectrometry of the ESRRB interactome in trophoblast stem cells revealed cell-type-specific partners including the Integrator complex and histone demethylase Lsd1, and showed that ESRRB directly regulates TS-specific transcription factors Elf5 and Eomes downstream of Fgf signaling.\",\n      \"evidence\": \"IP-MS interactome, ChIP-seq, Fgf pathway manipulation in trophoblast stem cells\",\n      \"pmids\": [\"26206133\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional requirement for Lsd1 or Integrator in ESRRB-driven TS cell maintenance was not tested\", \"Whether ESRRB recruits Lsd1 to specific loci was not shown\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"ESRRB was established as a mitotic bookmarking factor that remains dynamically bound to its DNA motif through cell division, ensuring rapid transcriptional re-activation of target genes in daughter cells—providing a mechanism for epigenetic memory of pluripotency through mitosis.\",\n      \"evidence\": \"Mitotic ChIP-seq, live-cell imaging, FRAP in ESCs\",\n      \"pmids\": [\"27723719\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether mitotic bookmarking is essential for self-renewal or dispensable was not genetically tested\", \"Mechanism by which ESRRB resists mitotic chromatin compaction was unresolved\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"ESRRB was shown to activate oxidative phosphorylation during reprogramming to naive pluripotency, establishing that it directly programs metabolic state (not just transcription factor networks) as part of cell identity conversion.\",\n      \"evidence\": \"Seahorse metabolic flux analysis, overexpression during reprogramming\",\n      \"pmids\": [\"28467928\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ESRRB target genes mediating OXPHOS activation were not fully characterized\", \"Whether metabolic reprogramming is a cause or consequence of pluripotency acquisition was not disambiguated\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Two studies resolved ESRRB's chromatin-level mechanisms: it acts as a pioneer factor that binds stable nucleosomes and hypermethylated DNA at silenced enhancers to recruit Oct4-Sox2-Nanog during reprogramming, and its downregulation during naive exit causes selective loss of NANOG and OCT4 occupancy at naive-specific regulatory elements.\",\n      \"evidence\": \"ATAC-seq, bisulfite sequencing, ChIP-seq time-course during EpiSC reprogramming; ChIP-seq in FACS-sorted Esrrb-positive vs -negative ESCs\",\n      \"pmids\": [\"29910149\", \"30275266\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ESRRB's pioneer activity requires specific co-factors or is intrinsic to its DBD was not determined\", \"The relationship between pioneer binding and mitotic bookmarking was not explored\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"O-GlcNAcylation at S25 by OGT was identified as the first post-translational modification tuning ESRRB, stabilizing the protein and enhancing its interactions with OCT4 and NANOG; separately, ESRRB was shown to directly activate a Bmp4 enhancer in trophoblast stem cells to regulate primordial germ cell specification.\",\n      \"evidence\": \"Metabolic labeling, mass spectrometry, S25 mutagenesis, Co-IP in ESCs; ChIP-seq and CRISPR enhancer deletion at Bmp4 locus\",\n      \"pmids\": [\"31492838\", \"31315026\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether O-GlcNAcylation affects pioneer or bookmarking activity was not tested\", \"Whether other glycosylation sites exist on ESRRB was not exhaustively mapped\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"ESRRB and Nr5a2 were shown to jointly occupy regulatory elements and together control Oct4/Sox2/Nanog binding genome-wide; double knockout collapsed the pluripotency network, revealing functional redundancy that had masked ESRRB's full essentiality in earlier single-knockout studies.\",\n      \"evidence\": \"Double knockout ESCs, ChIP-seq, transcriptome analysis\",\n      \"pmids\": [\"34397088\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Nr5a2 compensates for ESRRB at the pioneer/bookmarking level was not tested\", \"Structural basis for Nr5a2 and ESRRB co-occupancy at the same elements was not resolved\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Cell-cycle-resolved studies showed that ESRRB is upregulated during G2/M and drives extraembryonic endoderm differentiation in a cell-cycle-dependent manner; separately, ESRRB was found essential for gamma motor neuron functional properties, extending its post-mitotic roles beyond sensory cells to the motor system.\",\n      \"evidence\": \"Cell-cycle reporter with scRNA-seq, CRISPR KO and overexpression in ESCs; selective motor neuron knockout with electrophysiology\",\n      \"pmids\": [\"35594859\", \"36542664\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How cell-cycle phase mechanistically alters ESRRB target selection was not determined\", \"Direct transcriptional targets in gamma motor neurons were not fully defined\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"ESRRB was shown to be required for formative-state gene activation during the naive-to-formative epiblast transition, and in cervical cancer it activates SMAD7 to inhibit TGFβ signaling and forms a positive feedback loop with MYC, revealing context-dependent transcriptional programs beyond pluripotency maintenance.\",\n      \"evidence\": \"Genetic inactivation and gain-of-function in 3D organoid and PGCLC assays; CRISPR KO and rescue with xenograft in cancer cells\",\n      \"pmids\": [\"37106060\", \"37350664\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether the ESRRB-SMAD7-MYC loop operates in normal development was not tested\", \"How ESRRB transitions from naive to formative gene programs mechanistically was not resolved\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Lactylation at K228/K232 was identified as a metabolite-responsive modification that enhances ESRRB binding to target genes and promotes both self-renewal and XEN differentiation, linking glycolytic metabolism to ESRRB chromatin function; ERK-mediated phosphorylation at S42/S43 was then shown to act as a binary switch redirecting ESRRB from pluripotency to XEN gene targets.\",\n      \"evidence\": \"Mass spectrometry, site-directed mutagenesis, ChIP-seq for lactylation; quantitative phosphoproteomics and phosphomutant ChIP-seq for ERK sites\",\n      \"pmids\": [\"38473939\", \"39919750\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether lactylation and phosphorylation act combinatorially on the same ESRRB molecule was not tested\", \"Structural mechanism by which phosphorylation alters DNA-binding specificity is unknown\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"ESRRB was found to co-opt ancient MIR SINE-derived enhancers for naive-specific gene expression, co-occupying these elements with YY1 and promoting enhancer-to-super-enhancer loop formation, revealing a transposable element exaptation mechanism for ESRRB-dependent regulatory architecture.\",\n      \"evidence\": \"Hi-C, H3K27ac HiChIP, CRISPR MIR enhancer deletion, ChIP-seq in naive ESCs\",\n      \"pmids\": [\"40296153\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether MIR enhancer co-option is species-specific or conserved across mammals was not tested\", \"Functional significance of YY1 co-occupancy at MIR elements is not established beyond co-binding\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include whether ESRRB has an endogenous ligand, how its pioneer/bookmarking activities are coordinated or distinguished, the structural basis for phosphorylation-dependent target switching, and whether its diverse tissue-specific roles (ear, retina, motor neuron, trophoblast, ESC) share a common metabolic or chromatin-level mechanism.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No endogenous ligand identified despite pharmacological evidence of ligand responsiveness\", \"No structural model of ESRRB bound to chromatin or co-factors\", \"Integration of multiple PTM inputs on a single ESRRB molecule not assessed\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [3, 11, 14, 16]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [3, 5, 7, 8, 9, 10, 13, 15, 16, 17, 27, 28]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [2, 10]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [3, 14, 16, 19]},\n      {\"term_id\": \"GO:0005694\", \"supporting_discovery_ids\": [14]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [3, 5, 7, 8, 9, 13, 16, 27, 28]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [7, 22, 30]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 1, 20, 25, 28]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [14, 16, 23]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"NANOG\",\n      \"NCOA3\",\n      \"DAX1\",\n      \"SOX2\",\n      \"NR5A2\",\n      \"EP300\",\n      \"OGT\",\n      \"YY1\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}