{"gene":"CBFA2T3","run_date":"2026-06-09T22:57:17","timeline":{"discoveries":[{"year":1999,"finding":"ETO-2 (CBFA2T3) is a nuclear protein that forms homodimers and heterodimers with other ETO family members (ETO/MTG8, MTGR1) through a conserved region containing domain II; nuclear localization does not require domain III or the zinc-finger region.","method":"Northern analysis, nuclear localization studies, dimerization mapping by domain deletion","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct nuclear localization and dimerization mapping in transfected cells, single lab, multiple domain-deletion constructs","pmids":["10022820"],"is_preprint":false},{"year":2002,"finding":"CBFA2T3 functions as a transcriptional repressor when tethered to a GAL4 DNA-binding domain in reporter assays, and its re-introduction into breast cancer cell lines with reduced CBFA2T3 expression reduces colony growth on plastic and in soft agar, suggesting tumor suppressor activity.","method":"GAL4-fusion reporter assay, colony formation assay, soft agar assay after re-expression","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reporter assay plus functional rescue experiments, single lab, two orthogonal methods","pmids":["12183414"],"is_preprint":false},{"year":2004,"finding":"CBFA2T3 (ETO-2/MTG16) interacts with the nuclear receptor corepressor N-CoR through its MYND domain; AML1-ETO competitively occupies the ETO-2 binding site on N-CoR, reducing ETO-2/N-CoR interaction and thereby impairing granulocyte differentiation. Overexpression of ETO-2 rescues AML1-ETO-induced granulocyte differentiation arrest.","method":"Co-immunoprecipitation, overexpression rescue in 32Dcl3 and human CD34+ cells, MYND domain competition assay","journal":"Cancer research","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus functional rescue, single lab, multiple cell types","pmids":["15231665"],"is_preprint":false},{"year":2005,"finding":"AML1-MTG16 fusion protein blocks myeloid differentiation and proliferation in 32D/WT1 cells and induces epigenetic repressive changes (histone and DNA methylation) at the AML1 target gene Csf1r (c-fms), correlating with loss of myeloid differentiation in response to GM-CSF.","method":"Myeloid differentiation assays, chromatin/epigenetic analysis of Csf1r locus in 32D/WT1 cells expressing AML1-MTG16","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional differentiation assay plus epigenetic locus analysis, single lab","pmids":["16007222"],"is_preprint":false},{"year":2005,"finding":"ETO-2 (CBFA2T3) associates with SCL in erythroid and megakaryocytic cells; in erythroid cells it additionally interacts with Gfi-1b to form a tri-partite corepressor complex; this SCL/ETO-2/Gfi-1b complex is lost during erythroid differentiation. ETO-2 exerts repressor effects on SCL target genes.","method":"Proteomic characterization of SCL complexes, co-immunoprecipitation of endogenous proteins in primary cells, genetic epistasis/knockdown in erythroid cells","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal co-IP of endogenous proteins in primary cells plus functional epistasis by genetic studies, replicated in both cell lines and primary cells","pmids":["16287841"],"is_preprint":false},{"year":2006,"finding":"ETO2 is recruited into TAL-1/SCL complexes through interaction with E2A/HEB; ETO2 actively represses erythroid TAL-1 target genes and governs expansion of erythroid progenitors. At the onset of differentiation, a change in stoichiometry of ETO2 within the TAL-1 complex de-represses erythroid-specific target genes including Gfi-1b and p21Cip.","method":"Tagging/proteomics of TAL-1 complexes, ectopic expression and siRNA knockdown in hematopoietic progenitor cells, gene expression analysis","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 / Strong — mass spectrometry-based proteomics, confirmed by co-IP, functional siRNA knockdown and overexpression, multiple orthogonal methods in one study","pmids":["16407974"],"is_preprint":false},{"year":2006,"finding":"ErbB-4 s80 intracellular domain translocates to the nucleus, colocalizes and interacts with ETO2, and blocks ETO2-mediated transcriptional repression of a heterologous promoter. This effect does not require s80 kinase activity and is mediated by the C-terminal region of s80.","method":"Co-immunoprecipitation, co-localization, transcriptional reporter assay, kinase-dead mutant analysis","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — co-IP plus reporter assay plus domain mapping, single lab","pmids":["16815842"],"is_preprint":false},{"year":2006,"finding":"ZNF652 specifically interacts with CBFA2T3 through the C-terminal 109 amino acids of ZNF652; this interaction is substantially stronger than ZNF652 interactions with the other two ETO family members (CBFA2T1 and CBFA2T2). The CBFA2T3-ZNF652 complex represses transcription in reporter assays.","method":"Yeast two-hybrid screen, co-immunoprecipitation, transcriptional reporter assay","journal":"Molecular cancer research : MCR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — yeast two-hybrid plus co-IP plus reporter assay, single lab","pmids":["16966434"],"is_preprint":false},{"year":2008,"finding":"CBFA2T3 interacts with ZNF652 via its NHR3 and NHR4 domains binding a conserved proline-rich region in the C-terminus of ZNF652; the CBFA2T3-ZNF652 corepressor complex directly represses HEB (E-box gene) by binding a single ZNF652 response element within the HEB promoter.","method":"Domain mapping, chromatin immunoprecipitation, transcriptional reporter assay, co-immunoprecipitation","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — ChIP demonstrating direct promoter occupancy plus domain mapping plus reporter assay, single lab with multiple orthogonal methods","pmids":["18456661"],"is_preprint":false},{"year":2008,"finding":"Inactivation of Mtg16 in mice skews early myeloid progenitor cells toward granulocytic/macrophage lineage while reducing megakaryocyte-erythroid progenitors, and impairs rapid expansion of short-term stem cells and multipotent progenitors under hematopoietic stress. This proliferative defect is rescued by c-Myc but not Bcl2.","method":"Mtg16 knockout mice, flow cytometry of progenitor populations, rescue by c-Myc/Bcl2 complementation","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo knockout with detailed progenitor phenotyping plus genetic complementation experiment identifying c-Myc as downstream effector","pmids":["18710942"],"is_preprint":false},{"year":2008,"finding":"ETO2 (CBFA2T3) interacts with GATA1 in megakaryocytes; knockdown of ETO2 promotes megakaryocyte differentiation and enhances expression of terminal megakaryocyte genes including Pf4. ETO2 directly represses the Pf4 proximal promoter through GATA-binding sites and an E-Box motif, and endogenous ETO2, GATA1, and the SCL pentameric complex all occupy this promoter in vivo.","method":"Biotinylated GATA1 pull-down/proteomics, co-immunoprecipitation, ETO2 knockdown, chromatin immunoprecipitation, reporter assay","journal":"Blood","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — in vivo biotinylated protein pull-down proteomics, confirmed by multiple co-IP, ChIP, and functional knockdown across multiple methods","pmids":["18625887"],"is_preprint":false},{"year":2009,"finding":"Eto2/Mtg16 and Mtgr1 are heteromeric corepressors of TAL1/SCL in murine erythroid progenitors; they interact through the bHLH domain of Tal1 and the TAF110 domain of Eto2. Mtgr1 and Eto2 enhance each other's association with Tal1. Enforced Eto2 expression inhibits the Protein 4.2 (P4.2) gene promoter (a direct TAL1 target), and Eto2 chromatin occupancy at the P4.2 promoter decreases during differentiation in parallel with declining Eto2 protein.","method":"Tandem affinity purification/LC-MS, co-immunoprecipitation in COS-7 and MEL cells, Gal4-fusion domain mapping, GST pull-down, chromatin immunoprecipitation","journal":"Biochemical and biophysical research communications","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — mass spectrometry identification plus reciprocal co-IP plus domain mapping plus ChIP, multiple orthogonal methods in one study","pmids":["19799863"],"is_preprint":false},{"year":2009,"finding":"MTG16a (CBFA2T3) localizes to the nucleolus of breast epithelial cells and functions as a ribosomal RNA (rRNA) transcription repressor that counteracts MYC-driven rRNA activation. Knockdown or nucleolar sequestration of MTG16a impairs acinar morphogenesis and increases rRNA synthesis.","method":"RNA interference knockdown, nucleolar localization studies, rRNA transcription assays, 3D acinar morphogenesis assay","journal":"Journal of cellular and molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — RNAi plus functional rRNA assay plus localization, single lab","pmids":["19961547"],"is_preprint":false},{"year":2010,"finding":"MTG16 interacts with both CSL and the intracellular domains of Notch receptors; the Notch1 intracellular domain disrupts the MTG16-CSL interaction. Ex vivo Notch-dependent cell fate specification is impaired in Mtg16-/- hematopoietic progenitors and restored by MTG16 expression but not by an MTG16 derivative lacking the Notch intracellular domain binding site.","method":"Co-immunoprecipitation, Mtg16 knockout hematopoietic progenitor fate assays, MTG16 re-expression rescue with domain mutants","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — co-IP of endogenous complex components plus in vivo KO phenotype plus domain-specific rescue experiment, multiple orthogonal methods","pmids":["20123979"],"is_preprint":false},{"year":2010,"finding":"CBFA2T3 forms a corepressor complex with ZNF651 (a ZNF652 paralogue) that shares the same consensus DNA binding sequence as ZNF652 and represses target gene expression, performing functionally similar roles to the CBFA2T3-ZNF652 complex in a tissue-specific manner.","method":"Reporter assay, co-immunoprecipitation, DNA binding sequence analysis","journal":"FEBS letters","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, reporter assay plus co-IP without ChIP validation of direct target binding","pmids":["20116376"],"is_preprint":false},{"year":2011,"finding":"ETO2 (CBFA2T3) participates in the NLI (Ldb1 homolog) complex at a site downstream of the Aγ-globin gene (BGL3 region) in human erythroid cells. When β-globin is expressed, ETO2 and BCL11A co-occupy BGL3 sequences to repress γ-globin; when γ-globin is reactivated, ETO2 participation in the NLI complex at BGL3 is diminished, LCR proximity to the BGL3/γ-globin region is established, and both BGL3 and γ-globin are transcribed.","method":"ChIP of NLI complex members, chromatin conformation capture (chromosome conformation assays), knockdown of ETO2","journal":"Blood","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — ChIP plus chromatin conformation capture plus functional knockdown, multiple orthogonal methods establishing mechanistic role in γ-globin regulation","pmids":["22010104"],"is_preprint":false},{"year":2011,"finding":"Mtg16 is required for T-cell development; Mtg16-/- LSK cells fail to produce CD4+/CD8+ cells in response to Notch signal in vitro. Complementation shows that the capacity of Mtg16 to suppress E2A-dependent transcriptional activation and to bind the Notch intracellular domain are both required for T-cell fate specification.","method":"Mtg16 knockout mice, competitive bone marrow transplantation, in vitro Notch-driven differentiation assay, domain complementation","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo KO plus competitive BMT plus in vitro differentiation rescue with domain mutants, multiple orthogonal methods","pmids":["21536648"],"is_preprint":false},{"year":2012,"finding":"ETO2 directly regulates globin genes (HBB, HBA, ALAS2) in human erythroid cells by occupying GATA-1 target loci; ETO2 protein peaks early in erythroid differentiation and its decline contributes to activation of these targets. ETO2 overexpression represses, and shRNA knockdown de-represses, hemoglobin gene expression in primary erythroblasts.","method":"Microarray gene expression profiling, ChIP-seq integration, quantitative ChIP, shRNA knockdown and retroviral overexpression in primary erythroblasts","journal":"Experimental hematology","confidence":"High","confidence_rationale":"Tier 2 / Strong — ChIP-seq plus functional KD plus overexpression in primary human cells, multiple orthogonal methods","pmids":["23127762"],"is_preprint":false},{"year":2012,"finding":"Kaiso (ZBTB33) interacts with MTG16 through its zinc finger domains; MTG16 is required for efficient repression of Kaiso target genes including MMP-7. ChIP shows MTG16 occupies the Kaiso binding site at the MMP-7 promoter, and this repression requires Kaiso to bind its DNA binding site.","method":"Yeast two-hybrid screen, co-immunoprecipitation, chromatin immunoprecipitation, transcriptional reporter assay with Kaiso binding site mutants","journal":"PloS one","confidence":"High","confidence_rationale":"Tier 2 / Strong — yeast two-hybrid plus co-IP plus ChIP plus reporter assay with mechanistic mutant analysis, multiple orthogonal methods","pmids":["23251453"],"is_preprint":false},{"year":2014,"finding":"Mtg16 promotes plasmacytoid dendritic cell (pDC) differentiation and restricts classical DC (cDC) development in part by directly repressing Id2; Mtg16-deficient pDCs and cDC progenitors show aberrant Id2 induction, and Id2 deletion partially rescues impaired pDC development in Mtg16-/- mice.","method":"Mtg16 knockout mice, genome-wide expression and DNA-binding analysis (ChIP), Id2 genetic epistasis (Mtg16/Id2 double KO rescue)","journal":"The Journal of experimental medicine","confidence":"High","confidence_rationale":"Tier 2 / Strong — genome-wide binding analysis plus in vivo KO phenotype plus genetic epistasis rescue experiment, multiple orthogonal methods","pmids":["24980046"],"is_preprint":false},{"year":2015,"finding":"MTG16 loss promotes radioresistance in intestinal crypts and impacts intestinal stem cell function, shifting cellular response away from DNA damage-induced apoptosis toward DNA repair. Mtg16-/- crypts show increased Wnt3a-driven enterosphere formation but delayed maturation into enteroids.","method":"Mtg16 knockout mice, radiation injury model, flow cytometry for DNA damage markers, ex vivo crypt enteroid culture assays","journal":"American journal of physiology. Gastrointestinal and liver physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO with radiation model plus ex vivo organoid assays, single lab","pmids":["25573176"],"is_preprint":false},{"year":2019,"finding":"CBFA2T3 regulates cell-fate genes establishing leukemia stem cell gene expression signatures; its transcription is activated via the NM_005187 promoter by GCN5 in non-CBF AML. The RUNX1-RUNX1T1 fusion protein transcriptionally represses this CBFA2T3 promoter. ShRNA-mediated CBFA2T3 knockdown arrests G1/S progression and attenuates AML cell proliferation in vitro and in vivo.","method":"Gene set enrichment analysis of primary samples, shRNA knockdown (in vitro and xenograft), promoter analysis with GCN5 activation and RUNX1-RUNX1T1 repression","journal":"Blood advances","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — functional shRNA in vitro and in vivo plus promoter mechanism, single lab","pmids":["31040112"],"is_preprint":false},{"year":2019,"finding":"CBFA2T3 associates with PRDM14 in mouse leukemic cells independently of the related family member CBFA2T2; Prdm14-induced T-ALL does not occur in Cbfa2t3-deficient mice and develops with longer latency in heterozygotes, establishing that CBFA2T3 is required for PRDM14-driven leukemogenesis.","method":"Mass spectrometry protein interaction screen, co-immunoprecipitation, Cbfa2t3 knockout and heterozygous mouse leukemia model","journal":"Molecular cancer research : MCR","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — MS-identified interaction confirmed by co-IP plus genetic epistasis in vivo, single lab","pmids":["31015254"],"is_preprint":false},{"year":2020,"finding":"ETO2 (CBFA2T3) absence in mice interferes with downregulation of PU.1 and GATA2 in fetal liver, impeding commitment to erythroid maturation. ETO2 recruits the NuRD complex via its hydrophobic heptad repeat region to regulate histone acetylation and nucleosome occupancy at the β-globin locus control region and γ-globin gene; loss of ETO2 elevates LDB1, MED1, and Pol II and facilitates fetal γ-globin/LCR looping and γ-globin transcription.","method":"Eto2 knockout mice (including human β-globin transgenic), human CD34+ cells with ETO2 reduction, ChIP-seq, chromatin conformation capture, NuRD interaction assays with hydrophobic heptad repeat deletion mutant","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 1-2 / Strong — in vivo KO in multiple mouse models plus human primary cells plus ChIP-seq plus chromatin conformation assays plus domain mutant demonstrating NuRD interaction, highly replicated across multiple orthogonal methods","pmids":["32960220"],"is_preprint":false},{"year":2020,"finding":"MTG8 and MTG16 are expressed by +4/5 early intestinal progenitors (repressed by Notch/ATOH1 signaling) and repress transcription of stem cell-specific genes (Lgr5, Ascl2) and ATOH1-regulated secretory-lineage genes; MTG16-KO intestines show crypt hyperproliferation, ISC expansion, and impaired enterocyte differentiation.","method":"Lgr5-GFP sorted cell expression profiling, Mtg16/Mtg8 knockout intestinal organoids, histology, immunohistochemistry, RNA-seq, ChIP-seq of intestinal crypts","journal":"Gastroenterology","confidence":"High","confidence_rationale":"Tier 2 / Strong — genome-wide ChIP-seq plus RNA-seq plus KO phenotype in vivo and ex vivo organoids, multiple orthogonal methods","pmids":["32553763"],"is_preprint":false},{"year":2021,"finding":"CBFA2T3 and RUNX1 form a complex in BCP-ALL cells; RUNX1 drives expression of both RUNX1 and CBFA2T3 via an enhancer ~2 kb upstream of the CBFA2T3 promoter. CBFA2T3 strongly potentiates RUNX1 transcriptional activity (activation loop). A CBFA2T3 NHR2-mimicking peptide inhibits the RUNX1-CBFA2T3 interaction and reduces BCP-ALL proliferation in vitro and in xenograft models.","method":"ChIP-seq, co-immunoprecipitation, proximity ligation assay, luciferase reporter assay, xenograft mouse model","journal":"Journal of hematology & oncology","confidence":"High","confidence_rationale":"Tier 2 / Strong — ChIP-seq plus co-IP plus PLA plus reporter assay plus in vivo xenograft, multiple orthogonal methods in one study","pmids":["33743795"],"is_preprint":false},{"year":2022,"finding":"MTG16 controls colonic epithelial differentiation and regeneration by repressing E protein-mediated transcription; a point mutation (P209T) that attenuates MTG16:E protein interactions partially phenocopies MTG16 deficiency with increased tumorigenicity, demonstrating that E protein repression is a key functional mechanism of MTG16 in the colon.","method":"Mtg16-/- and Mtg16P209T knock-in mice, DSS colitis model, azoxymethane/DSS colitis-associated cancer model, transcriptomic analysis, chromatin immunoprecipitation","journal":"JCI insight","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo KO and separation-of-function point mutant knock-in plus disease model plus transcriptomics, mechanistically rigorous","pmids":["35503250"],"is_preprint":false},{"year":2024,"finding":"ETO2 (CBFA2T3) directly activates transcription of MYB (among other genes) at enhancers by colocalizing with EP300 and MYB, forming an ETO2/MYB feedforward transcription activation loop. EP300 acetyltransferase inhibition strongly reduces ETO2 protein, chromatin binding, and ETO2-activated transcripts.","method":"Transcriptomic and chromatin binding analyses (ChIP/CUT&RUN), controlled ETO2 depletion models, EP300 inhibition (small molecule and PROTAC)","journal":"HemaSphere","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genome-wide binding plus depletion model plus pharmacological inhibition, single lab","pmids":["38903535"],"is_preprint":false},{"year":2024,"finding":"CBFA2T3 is a PPARA-sensitive gene in mouse liver; hepatic CBFA2T3 modulates expression of Cidea, Cd36, and Fabp1 (lipid accumulation genes) and Hspa1b and Ca5a. Loss of Cbfa2t3 in mice leads to increased insulin resistance and fasting-induced hepatic lipid accumulation.","method":"Cbfa2t3 knockout mice, PPARA ligand (WY14643) treatment, glucose and insulin tolerance tests, hepatic histology, gene expression analysis","journal":"Cells","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo KO plus metabolic phenotyping, single lab","pmids":["38786053"],"is_preprint":false},{"year":2025,"finding":"ETO2 NHR4 domain interacts with multiple polyproline-leucine motifs within GATAD2A (a NuRD complex component); oligomerization of ETO2 NHR3 enhances binding affinity for peptides containing ≥2 polyproline-leucine motifs (multivalent interaction). A peptide disrupting this interaction elevates γ-globin expression and induces differentiation of HUDEP-2 and K562 cells.","method":"Biochemical binding assays, peptide competition, enforced peptide expression in cell lines with γ-globin expression readout","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct biochemical reconstitution of ETO2-NuRD interaction plus mutant peptide functional validation, multiple orthogonal in vitro and cellular methods in one study","pmids":["40421803"],"is_preprint":false},{"year":2025,"finding":"Mtg16 interaction with E proteins (via NHR1 domain residue F210) is critical for B and T lymphopoiesis; F210A knock-in mice show impaired lymphopoiesis after competitive bone marrow transplant equivalent to Mtg16-/- mice. The Mtg16:E protein interaction is also required for normal burst-forming unit-erythroid (BFU-E) response after hemolytic stress, though Mtg16-/- mice are more severely anemic.","method":"Mtg16F210A knock-in mice, Mtg16P209T knock-in mice, competitive bone marrow transplantation, phenylhydrazine-induced hemolytic anemia model, colony-forming assays","journal":"Experimental hematology","confidence":"High","confidence_rationale":"Tier 2 / Strong — separation-of-function knock-in point mutation in vivo, compared to KO, in multiple hematopoietic assays; mechanistically rigorous","pmids":["40316246"],"is_preprint":false},{"year":2025,"finding":"ETO2 (via the ETO2::GLIS2 fusion) drives progressive chromatin rewiring during leukemogenesis: it aberrantly activates the osteogenic homeobox factor DLX3, which in turn increases accessibility to ETS factor motifs and reduces GATA motif accessibility. DLX3 knockout abrogates leukemia initiation in an iPSC model expressing ETO2::GLIS2.","method":"CRISPR-Cas9 genome editing of human iPSCs to create the ETO2::GLIS2 inversion, single-cell transcriptomics and chromatin accessibility profiling, DLX3 KO epistasis","journal":"Blood","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — iPSC genome-editing model plus multi-omics plus genetic epistasis, single lab, findings about the fusion protein with CBFA2T3 moiety","pmids":["39656971"],"is_preprint":false},{"year":2024,"finding":"CBFA2T3-GLIS2 fusion protein binds genome-wide through its NHR2 domain (ETO moiety)-dependent homodimerization; loss of the NHR2 domain abrogates leukemia development and downregulates JAK/STAT, Hedgehog, and NOTCH transcriptional signatures. The fusion upregulates a network of transcription factor genes (NOTCH, Hedgehog, TGFβ, WNT pathways) by directly binding their regulatory elements.","method":"CBFA2T3-GLIS2 mouse model, genome-wide ChIP/binding mapping, NHR2 deletion mutant functional studies","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo mouse model plus genome-wide binding plus domain deletion mutant, single lab","pmids":["39384814"],"is_preprint":false},{"year":2017,"finding":"ETO2-GLIS2 fusion oncoprotein confers megakaryocytic identity via the GLIS2 moiety while both ETO2 and GLIS2 domains are required to drive increased self-renewal. ETO2-GLIS2 directly binds DNA and controls transcription by upregulating expression and interacting with ERG at enhancer elements. Interference with ETO2-GLIS2 oligomerization reverses transcriptional activation at enhancers and promotes megakaryocytic differentiation.","method":"Domain-specific functional studies, ChIP/enhancer occupancy assays, oligomerization inhibition experiments","journal":"Cancer cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — mechanistic dissection with domain-specific constructs, ChIP at enhancers, functional oligomerization interference with differentiation readout, multiple orthogonal methods","pmids":["28292442"],"is_preprint":false},{"year":2012,"finding":"MTG16 is concentrated in the cytoplasm of erythroleukemia cell lines (human and mouse), and treatment with the CRM1 antagonist leptomycin-B causes MTG16 levels to rise in the nucleus and decline in the cytoplasm, indicating bidirectional CRM1-dependent nucleocytoplasmic shuttling.","method":"Immunofluorescence with validated α-MTG16 antibodies, leptomycin-B CRM1 inhibition, subcellular fractionation","journal":"Antibody technology journal","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct localization by validated antibodies plus CRM1 inhibitor experiment, single lab, abstract-level detail","pmids":["36267145"],"is_preprint":false},{"year":2025,"finding":"MYB represses ζ-globin expression by upregulating ETO2; ETO2 functions as a novel repressor of ζ-globin through coordination with the NuRD complex to modulate histone deacetylation at the ζ-globin locus. ETO2 knockout in primary CD34+ cells from non-deletional hemoglobin H patients significantly increases ζ-globin expression.","method":"MYB knockout mouse models, MYB-knockout human cell lines, ETO2 knockout in primary CD34+ cells, multiomics (RNA-seq, ChIP), NuRD interaction analysis","journal":"Acta biochimica et biophysica Sinica","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic KO in vivo and in primary human cells plus multiomics mechanistic analysis, single lab","pmids":["39757769"],"is_preprint":false}],"current_model":"CBFA2T3 (ETO2/MTG16) is a transcriptional corepressor that functions within multiprotein complexes—most notably the SCL/TAL1-GATA1-LMO2-LDB1/NLI complex and NuRD complex—to repress target gene expression in hematopoietic cells; it interacts with binding partners including N-CoR, E proteins (E2A/HEB), Gfi-1b, ZNF652/ZNF651, Kaiso, Notch intracellular domain, and CSL, and it regulates erythroid maturation (including globin gene switching), megakaryocyte differentiation, lymphopoiesis (via E protein repression), dendritic cell subset balance (via Id2 repression), intestinal stem cell niche exit and lineage allocation, and hematopoietic stress responses; as a fusion oncogene (CBFA2T3-GLIS2), it drives pediatric acute megakaryoblastic leukemia by aberrantly activating transcriptional networks at enhancers through its dimerization (NHR2) domain and ERG co-occupation."},"narrative":{"mechanistic_narrative":"CBFA2T3 (ETO2/MTG16) is a nuclear transcriptional corepressor that operates as a dimerizing scaffold within hematopoietic and epithelial transcription factor complexes to set the timing and direction of lineage gene expression programs [PMID:10022820, PMID:16407974, PMID:32553763]. It is recruited into the SCL/TAL1 master regulatory complex through E proteins (E2A/HEB) and the TAL1 bHLH domain, and assembles tripartite corepressor modules with Gfi-1b and GATA1; in erythroid and megakaryocytic progenitors it represses target genes such as Gfi-1b, p21Cip, Pf4, and the globin genes (HBB, HBA, ALAS2), and a stoichiometric decline in ETO2 within the complex during differentiation de-represses these terminal genes [PMID:16287841, PMID:16407974, PMID:18625887, PMID:23127762]. Repression is executed in part by recruiting the NuRD complex via the ETO2 hydrophobic heptad/NHR domains—NHR4 engages multivalent polyproline-leucine motifs in GATAD2A, with NHR3 oligomerization enhancing affinity—to control histone acetylation and nucleosome occupancy at the β-globin LCR and γ/ζ-globin genes, governing globin switching [PMID:32960220, PMID:40421803, PMID:39757769]. ETO2 also binds N-CoR through its MYND domain and partners with sequence-specific factors ZNF652/ZNF651, Kaiso (ZBTB33), and the Notch/CSL axis to direct context-specific repression of targets including HEB and MMP-7 [PMID:15231665, PMID:18456661, PMID:23251453, PMID:20123979]. In vivo it controls hematopoietic progenitor expansion and stress responses (downstream of c-Myc), T- and B-lymphopoiesis and dendritic cell subset balance through E protein and Notch-dependent repression of targets such as Id2, and intestinal/colonic stem cell niche exit and differentiation by repressing stem-cell and secretory-lineage genes—where the separation-of-function point mutations P209T (E protein binding) and F210A (NHR1/E protein) define E protein repression as a core mechanism [PMID:18710942, PMID:21536648, PMID:24980046, PMID:32553763, PMID:35503250, PMID:40316246]. Beyond corepression, CBFA2T3 acts in oncogenic contexts: it potentiates RUNX1 transcriptional activity in BCP-ALL and is required for PRDM14-driven T-ALL, and as the CBFA2T3-GLIS2/ETO2-GLIS2 fusion it drives pediatric acute megakaryoblastic leukemia through NHR2-dependent oligomerization, co-occupation of enhancers with ERG, and aberrant activation of transcription factor networks [PMID:31015254, PMID:33743795, PMID:28292442, PMID:39384814].","teleology":[{"year":1999,"claim":"Established that CBFA2T3 is a nuclear protein capable of homo- and hetero-dimerization with other ETO family members, defining the dimerization architecture that underlies its later scaffolding function.","evidence":"Nuclear localization studies and dimerization mapping by domain deletion in transfected cells","pmids":["10022820"],"confidence":"Medium","gaps":["Did not identify physiological transcriptional partners","No functional consequence of dimerization established"]},{"year":2002,"claim":"Demonstrated that CBFA2T3 is an intrinsic transcriptional repressor with tumor-suppressor-like activity, the first functional assignment.","evidence":"GAL4-fusion reporter assay plus colony formation/soft agar rescue in breast cancer lines","pmids":["12183414"],"confidence":"Medium","gaps":["No direct target genes identified","Mechanism of repression not defined"]},{"year":2004,"claim":"Identified N-CoR as a corepressor partner via the MYND domain and showed AML1-ETO competes for this site, linking CBFA2T3 to myeloid differentiation control.","evidence":"Co-IP and MYND-domain competition with overexpression rescue in 32Dcl3 and CD34+ cells","pmids":["15231665"],"confidence":"Medium","gaps":["Direct chromatin targets not mapped","Quantitative competition with endogenous proteins unclear"]},{"year":2005,"claim":"Placed CBFA2T3 inside the SCL/TAL1 transcription factor complex with Gfi-1b, establishing it as a corepressor of erythroid/megakaryocytic master regulators whose complex is dissolved during differentiation.","evidence":"Proteomics and reciprocal endogenous co-IP in primary erythroid/megakaryocytic cells with knockdown","pmids":["16287841"],"confidence":"High","gaps":["Direct DNA occupancy at target loci not yet shown","Trigger for complex dissolution undefined"]},{"year":2006,"claim":"Defined the recruitment mechanism (via E2A/HEB) and the stoichiometric-switch model in which falling ETO2 levels de-repress erythroid genes, explaining how a repressor governs differentiation timing.","evidence":"Proteomics of TAL-1 complexes plus siRNA knockdown and overexpression with expression profiling","pmids":["16407974"],"confidence":"High","gaps":["Mechanism controlling ETO2 protein decline not identified","Direct vs indirect target distinction limited"]},{"year":2006,"claim":"Showed CBFA2T3 repression is antagonized by the ErbB-4 s80 intracellular domain, linking receptor signaling to corepressor output.","evidence":"Co-IP, colocalization, reporter assay, kinase-dead mutant analysis","pmids":["16815842"],"confidence":"Medium","gaps":["Physiological context of ErbB-4/ETO2 crosstalk untested","Endogenous target genes not identified"]},{"year":2008,"claim":"Mapped a specific ZNF652/ZNF651 corepressor partnership (NHR3/NHR4 binding a proline-rich motif) and demonstrated direct promoter occupancy and repression of HEB, providing a sequence-specific recruitment route.","evidence":"Yeast two-hybrid, domain mapping, ChIP, and reporter assays","pmids":["16966434","18456661","20116376"],"confidence":"High","gaps":["Genome-wide ZNF652/ETO2 target repertoire incomplete","ZNF651 partnership only reporter/co-IP validated"]},{"year":2008,"claim":"Established in vivo roles in hematopoiesis: Mtg16 controls myeloid-vs-MEP lineage allocation and stress progenitor expansion via a c-Myc-dependent mechanism.","evidence":"Mtg16 knockout mice with progenitor phenotyping and c-Myc/Bcl2 complementation","pmids":["18710942"],"confidence":"High","gaps":["Direct ETO2 targets driving the c-Myc effect not defined","Cell-intrinsic vs niche contributions not fully separated"]},{"year":2008,"claim":"Demonstrated direct GATA1 partnership and promoter occupancy at megakaryocyte genes (Pf4), with knockdown promoting terminal differentiation, integrating ETO2 into the GATA1/SCL pentameric complex.","evidence":"Biotinylated GATA1 pull-down proteomics, co-IP, ChIP, knockdown, reporter assay","pmids":["18625887"],"confidence":"High","gaps":["Full GATA1-target genome occupancy not mapped","Switch controlling repression release at differentiation unclear"]},{"year":2009,"claim":"Resolved the cooperative assembly of ETO2 and Mtgr1 on TAL1 (via TAF110/bHLH domains) and showed chromatin occupancy declines with ETO2 protein during differentiation at direct targets like P4.2.","evidence":"TAP/LC-MS, co-IP, GAL4 domain mapping, GST pulldown, ChIP in MEL cells","pmids":["19799863"],"confidence":"High","gaps":["Quantitative stoichiometry in vivo not measured","How Mtgr1 mutually enhances Tal1 binding unresolved"]},{"year":2009,"claim":"Extended CBFA2T3 function to the nucleolus as an rRNA transcription repressor that counteracts MYC, broadening its role beyond Pol II target genes.","evidence":"RNAi knockdown, nucleolar localization, rRNA transcription and 3D acinar assays","pmids":["19961547"],"confidence":"Medium","gaps":["Molecular mechanism of rDNA repression undefined","Relationship to its Pol II corepressor activity unclear"]},{"year":2010,"claim":"Linked CBFA2T3 to Notch signaling via CSL/Notch ICD binding and showed this interaction is required for Notch-dependent hematopoietic fate, integrating it into a major developmental pathway.","evidence":"Co-IP, Mtg16 KO progenitor fate assays, domain-specific rescue","pmids":["20123979"],"confidence":"High","gaps":["Direct CSL-target genes regulated by MTG16 not enumerated","Notch ICD displacement kinetics not quantified"]},{"year":2011,"claim":"Demonstrated requirement of MTG16 for T-cell development through dual capacity to suppress E2A-dependent activation and bind Notch ICD.","evidence":"Mtg16 KO mice, competitive BMT, Notch-driven differentiation with domain complementation","pmids":["21536648"],"confidence":"High","gaps":["Direct E2A/Notch co-target genes in T-progenitors not mapped"]},{"year":2011,"claim":"Positioned ETO2 within the NLI/Ldb1 complex at the BGL3 region with BCL11A to repress γ-globin, mechanistically tying ETO2 to hemoglobin switching via chromatin looping.","evidence":"ChIP of NLI members, chromosome conformation capture, ETO2 knockdown","pmids":["22010104"],"confidence":"High","gaps":["Causal order of ETO2 loss vs looping not fully separated","Direct ETO2-BCL11A interaction not shown"]},{"year":2012,"claim":"Showed ETO2 directly occupies GATA1 globin loci and that its early peak/decline times hemoglobin gene activation in human erythroblasts.","evidence":"Microarray, ChIP-seq integration, quantitative ChIP, shRNA and overexpression in primary erythroblasts","pmids":["23127762"],"confidence":"High","gaps":["Mechanism setting ETO2 protein dynamics not defined"]},{"year":2012,"claim":"Identified Kaiso (ZBTB33) as a sequence-specific recruiter directing MTG16 to repress targets like MMP-7, expanding its partner repertoire.","evidence":"Yeast two-hybrid, co-IP, ChIP, reporter assay with binding-site mutants","pmids":["23251453"],"confidence":"High","gaps":["Genome-wide Kaiso/MTG16 co-targets not mapped"]},{"year":2012,"claim":"Revealed CRM1-dependent nucleocytoplasmic shuttling of MTG16, indicating localization is regulated and may control availability for nuclear repression.","evidence":"Immunofluorescence with validated antibodies, leptomycin-B inhibition, fractionation","pmids":["36267145"],"confidence":"Medium","gaps":["Functional consequence of shuttling untested","Signals/conditions controlling export unknown","Abstract-level detail only"]},{"year":2014,"claim":"Established that Mtg16 directs dendritic cell subset balance by directly repressing Id2, with genetic rescue confirming the target.","evidence":"Mtg16 KO mice, genome-wide ChIP/expression, Mtg16/Id2 double-KO epistasis","pmids":["24980046"],"confidence":"High","gaps":["Other DC-relevant direct targets not detailed"]},{"year":2015,"claim":"Implicated MTG16 in intestinal stem cell function and the DNA-damage response, shifting crypt cells between apoptosis and repair after radiation.","evidence":"Mtg16 KO mice, radiation model, DNA-damage flow cytometry, crypt enteroid assays","pmids":["25573176"],"confidence":"Medium","gaps":["Direct transcriptional targets controlling repair-vs-apoptosis not identified"]},{"year":2019,"claim":"Showed CBFA2T3 establishes leukemia stem cell signatures in non-CBF AML and that its promoter is activated by GCN5 and repressed by RUNX1-RUNX1T1, with knockdown arresting cell cycle.","evidence":"GSEA, shRNA in vitro and xenograft, promoter analysis","pmids":["31040112"],"confidence":"Medium","gaps":["Direct CBFA2T3 leukemic targets incompletely defined","Whether it acts as repressor or activator here unresolved"]},{"year":2019,"claim":"Identified PRDM14 as a partner and demonstrated CBFA2T3 is genetically required for PRDM14-driven T-ALL, an oncogenic dependency distinct from its corepressor partners.","evidence":"MS interaction screen, co-IP, Cbfa2t3 KO/heterozygous leukemia models","pmids":["31015254"],"confidence":"Medium","gaps":["Target genes of the PRDM14-CBFA2T3 complex not mapped"]},{"year":2020,"claim":"Defined the NuRD-recruitment mechanism (hydrophobic heptad repeat) by which ETO2 controls histone acetylation, nucleosome occupancy, and LCR/γ-globin looping, and showed its requirement for erythroid commitment via PU.1/GATA2 downregulation.","evidence":"Eto2 KO mice (β-globin transgenic), human CD34+ reduction, ChIP-seq, 3C, NuRD interaction with heptad-deletion mutant","pmids":["32960220"],"confidence":"High","gaps":["Precise NuRD subunit contact not yet resolved at this stage"]},{"year":2020,"claim":"Extended MTG16 function to intestinal epithelium, repressing stem-cell (Lgr5, Ascl2) and ATOH1 secretory-lineage genes downstream of Notch, controlling crypt proliferation and differentiation.","evidence":"Lgr5-GFP profiling, Mtg16/Mtg8 KO organoids, RNA-seq, ChIP-seq of crypts","pmids":["32553763"],"confidence":"High","gaps":["Cooperation/redundancy with MTG8 partially resolved"]},{"year":2021,"claim":"Showed CBFA2T3 potentiates rather than represses RUNX1 in BCP-ALL within a feedforward enhancer loop, and that an NHR2-mimicking peptide disrupts the interaction and reduces tumor growth.","evidence":"ChIP-seq, co-IP, PLA, reporter assay, xenograft","pmids":["33743795"],"confidence":"High","gaps":["Mechanism switching CBFA2T3 from repressor to coactivator context-dependent and not fully defined"]},{"year":2022,"claim":"Used a separation-of-function point mutant (P209T) to prove that E protein repression is a central mechanism of MTG16 in colonic differentiation and tumor suppression.","evidence":"Mtg16-/- and Mtg16P209T knock-in mice, colitis and colitis-associated cancer models, transcriptomics, ChIP","pmids":["35503250"],"confidence":"High","gaps":["Full set of E protein targets in colon not enumerated"]},{"year":2024,"claim":"Revealed an unexpected activating role in which ETO2 colocalizes with EP300 and MYB at enhancers in a feedforward loop, with EP300 acetyltransferase activity stabilizing ETO2 protein and chromatin binding.","evidence":"Transcriptomics, ChIP/CUT&RUN, ETO2 depletion, EP300 small-molecule and PROTAC inhibition","pmids":["38903535"],"confidence":"Medium","gaps":["Cellular context determining activation vs repression unresolved","Direct EP300-ETO2 contact not biochemically mapped"]},{"year":2024,"claim":"Demonstrated the CBFA2T3-GLIS2 fusion drives leukemia through NHR2-dependent homodimerization and direct binding of transcription factor regulatory elements, activating NOTCH/Hedgehog/TGFβ/WNT/JAK-STAT networks.","evidence":"CBFA2T3-GLIS2 mouse model, genome-wide binding, NHR2 deletion mutant","pmids":["39384814"],"confidence":"Medium","gaps":["Direct vs indirect targets within the network not fully separated"]},{"year":2024,"claim":"Provided biochemical resolution of the ETO2-NuRD interface: NHR4 binds multivalent polyproline-leucine motifs in GATAD2A, with NHR3 oligomerization boosting affinity, and a disrupting peptide elevates γ-globin.","evidence":"Biochemical binding assays, peptide competition, enforced peptide expression in HUDEP-2/K562","pmids":["40421803"],"confidence":"High","gaps":["In vivo validation of the peptide's therapeutic potential pending"]},{"year":2025,"claim":"Defined the NHR1 residue F210 as critical for E protein binding and lymphopoiesis using a separation-of-function knock-in, distinguishing E protein-dependent from -independent ETO2 functions in hematopoietic stress.","evidence":"Mtg16F210A and P209T knock-in mice, competitive BMT, phenylhydrazine hemolysis model, colony assays","pmids":["40316246"],"confidence":"High","gaps":["Identity of E protein-independent functions contributing to severe anemia unresolved"]},{"year":2025,"claim":"Identified ETO2 as a MYB-induced repressor of ζ-globin via NuRD-mediated histone deacetylation, extending its globin-switching role to the α-cluster with therapeutic relevance for hemoglobin H disease.","evidence":"MYB KO mouse and cell models, ETO2 KO in patient CD34+ cells, multiomics, NuRD interaction analysis","pmids":["39757769"],"confidence":"Medium","gaps":["Direct ETO2 occupancy at ζ-globin locus quantification limited"]},{"year":2025,"claim":"Showed the ETO2::GLIS2 fusion progressively rewires chromatin by activating DLX3, which redistributes ETS/GATA motif accessibility and is required for leukemia initiation.","evidence":"CRISPR-engineered iPSC ETO2::GLIS2 model, single-cell multi-omics, DLX3 KO epistasis","pmids":["39656971"],"confidence":"Medium","gaps":["How DLX3 mechanistically alters factor accessibility not fully defined","Single-lab model system"]},{"year":null,"claim":"What molecular switch converts CBFA2T3 between corepressor (NuRD/N-CoR-recruiting) and coactivator (EP300/RUNX1-potentiating) modes, and what regulates its protein-level dynamics and CRM1-dependent localization, remains unresolved.","evidence":"No single study in the timeline reconciles its opposing transcriptional outputs across contexts","pmids":[],"confidence":"Low","gaps":["Context-determinant for activation vs repression unknown","Post-translational control of ETO2 protein abundance undefined","Structural basis for switching not established"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[1,4,5,8,10,17,24,27]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[10,32,33]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[5,11,23,29]},{"term_id":"GO:0042393","term_label":"histone binding","supporting_discovery_ids":[23,35]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,34]},{"term_id":"GO:0005730","term_label":"nucleolus","supporting_discovery_ids":[12]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[34]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[5,8,10,17,24]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[3,23,24,35]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[9,13,16,19,24]},{"term_id":"R-HSA-168256","term_label":"Immune System","supporting_discovery_ids":[9,16,19,30]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[21,22,32,33]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[13,16]}],"complexes":["SCL/TAL1 transcription complex","NuRD complex","NLI/LDB1 complex","N-CoR corepressor complex"],"partners":["TAL1","GATA1","E2A/HEB","GFI-1B","ZNF652","ZBTB33","GATAD2A","RUNX1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O75081","full_name":"Transcriptional corepressor CBFA2T3","aliases":["MTG8-related protein 2","Myeloid translocation gene on chromosome 16 protein","hMTG16","Zinc finger MYND domain-containing protein 4"],"length_aa":653,"mass_kda":71.2,"function":"Transcriptional corepressor which facilitates transcriptional repression via its association with DNA-binding transcription factors and recruitment of other corepressors and histone-modifying enzymes (PubMed:12559562, PubMed:15203199, PubMed:16966434, PubMed:18456661). Can repress the expression of MMP7 in a ZBTB33-dependent manner (PubMed:23251453). Reduces the protein levels and stability of the transcriptinal regulator HIF1A; interacts with EGLN1 and promotes the HIF1A prolyl hydroxylation-dependent ubiquitination and proteasomal degradation pathway (PubMed:25974097). Contributes to inhibition of glycolysis and stimulation of mitochondrial respiration by down-regulating the expression of glycolytic genes including PFKFB3, PFKFB4, PDK1, PFKP, LDHA and HK1 which are direct targets of HIF1A (PubMed:23840896, PubMed:25974097). Regulates the proliferation and the differentiation of erythroid progenitors by repressing the expression of TAL1 target genes (By similarity). Plays a role in granulocyte differentiation (PubMed:15231665) Isoform 2 functions as an A-kinase-anchoring protein (PubMed:11823486)","subcellular_location":"Nucleus, nucleoplasm; Golgi apparatus membrane","url":"https://www.uniprot.org/uniprotkb/O75081/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/CBFA2T3","classification":"Not Classified","n_dependent_lines":7,"n_total_lines":1208,"dependency_fraction":0.005794701986754967},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/CBFA2T3","total_profiled":1310},"omim":[{"mim_id":"619969","title":"ZINC FINGER- AND BTB DOMAIN-CONTAINING PROTEIN 47; ZBTB47","url":"https://www.omim.org/entry/619969"},{"mim_id":"613907","title":"ZINC FINGER PROTEIN 652; ZNF652","url":"https://www.omim.org/entry/613907"},{"mim_id":"603870","title":"CORE-BINDING FACTOR, ALPHA SUBUNIT 2, TRANSLOCATED TO, 3; CBFA2T3","url":"https://www.omim.org/entry/603870"},{"mim_id":"603672","title":"CORE-BINDING FACTOR, RUNT DOMAIN, ALPHA SUBUNIT 2, TRANSLOCATED TO, 2; CBFA2T2","url":"https://www.omim.org/entry/603672"},{"mim_id":"602228","title":"TRANSCRIPTION FACTOR 7-LIKE 2; TCF7L2","url":"https://www.omim.org/entry/602228"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Enhanced","locations":[{"location":"Nucleoplasm","reliability":"Enhanced"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":36.7},{"tissue":"lymphoid tissue","ntpm":27.4},{"tissue":"pancreas","ntpm":25.8}],"url":"https://www.proteinatlas.org/search/CBFA2T3"},"hgnc":{"alias_symbol":["MTGR2","ZMYND4","MTG16","RUNX1T3","ETO2"],"prev_symbol":[]},"alphafold":{"accession":"O75081","domains":[{"cath_id":"1.20.120.1110","chopping":"168-271","consensus_level":"high","plddt":84.6444,"start":168,"end":271},{"cath_id":"-","chopping":"555-595","consensus_level":"medium","plddt":87.4341,"start":555,"end":595}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O75081","model_url":"https://alphafold.ebi.ac.uk/files/AF-O75081-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O75081-F1-predicted_aligned_error_v6.png","plddt_mean":60.94},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=CBFA2T3","jax_strain_url":"https://www.jax.org/strain/search?query=CBFA2T3"},"sequence":{"accession":"O75081","fasta_url":"https://rest.uniprot.org/uniprotkb/O75081.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O75081/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O75081"}},"corpus_meta":[{"pmid":"23153540","id":"PMC_23153540","title":"An Inv(16)(p13.3q24.3)-encoded CBFA2T3-GLIS2 fusion protein defines an aggressive subtype of pediatric acute megakaryoblastic leukemia.","date":"2012","source":"Cancer cell","url":"https://pubmed.ncbi.nlm.nih.gov/23153540","citation_count":225,"is_preprint":false},{"pmid":"16287841","id":"PMC_16287841","title":"ETO-2 associates with SCL in erythroid cells and megakaryocytes and provides repressor functions in erythropoiesis.","date":"2005","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/16287841","citation_count":122,"is_preprint":false},{"pmid":"16407974","id":"PMC_16407974","title":"ETO2 coordinates cellular proliferation and differentiation during erythropoiesis.","date":"2006","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/16407974","citation_count":120,"is_preprint":false},{"pmid":"23407549","id":"PMC_23407549","title":"CBFA2T3-GLIS2 fusion transcript is a novel common feature in pediatric, cytogenetically normal AML, not restricted to FAB M7 subtype.","date":"2013","source":"Blood","url":"https://pubmed.ncbi.nlm.nih.gov/23407549","citation_count":116,"is_preprint":false},{"pmid":"28292442","id":"PMC_28292442","title":"ETO2-GLIS2 Hijacks Transcriptional Complexes to Drive Cellular Identity and Self-Renewal in Pediatric Acute Megakaryoblastic Leukemia.","date":"2017","source":"Cancer cell","url":"https://pubmed.ncbi.nlm.nih.gov/28292442","citation_count":74,"is_preprint":false},{"pmid":"18710942","id":"PMC_18710942","title":"Deletion of Mtg16, a target of t(16;21), alters hematopoietic progenitor cell proliferation and lineage allocation.","date":"2008","source":"Molecular and cellular biology","url":"https://pubmed.ncbi.nlm.nih.gov/18710942","citation_count":71,"is_preprint":false},{"pmid":"31719049","id":"PMC_31719049","title":"Comprehensive Transcriptome Profiling of Cryptic CBFA2T3-GLIS2 Fusion-Positive AML Defines Novel Therapeutic Options: A COG and TARGET Pediatric AML Study.","date":"2019","source":"Clinical cancer research : an official journal of the American Association for Cancer Research","url":"https://pubmed.ncbi.nlm.nih.gov/31719049","citation_count":63,"is_preprint":false},{"pmid":"30592296","id":"PMC_30592296","title":"CBFA2T3-GLIS2-positive acute myeloid leukaemia. 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dimerization mapping by domain deletion\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct nuclear localization and dimerization mapping in transfected cells, single lab, multiple domain-deletion constructs\",\n      \"pmids\": [\"10022820\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"CBFA2T3 functions as a transcriptional repressor when tethered to a GAL4 DNA-binding domain in reporter assays, and its re-introduction into breast cancer cell lines with reduced CBFA2T3 expression reduces colony growth on plastic and in soft agar, suggesting tumor suppressor activity.\",\n      \"method\": \"GAL4-fusion reporter assay, colony formation assay, soft agar assay after re-expression\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reporter assay plus functional rescue experiments, single lab, two orthogonal methods\",\n      \"pmids\": [\"12183414\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"CBFA2T3 (ETO-2/MTG16) interacts with the nuclear receptor corepressor N-CoR through its MYND domain; AML1-ETO competitively occupies the ETO-2 binding site on N-CoR, reducing ETO-2/N-CoR interaction and thereby impairing granulocyte differentiation. Overexpression of ETO-2 rescues AML1-ETO-induced granulocyte differentiation arrest.\",\n      \"method\": \"Co-immunoprecipitation, overexpression rescue in 32Dcl3 and human CD34+ cells, MYND domain competition assay\",\n      \"journal\": \"Cancer research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus functional rescue, single lab, multiple cell types\",\n      \"pmids\": [\"15231665\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"AML1-MTG16 fusion protein blocks myeloid differentiation and proliferation in 32D/WT1 cells and induces epigenetic repressive changes (histone and DNA methylation) at the AML1 target gene Csf1r (c-fms), correlating with loss of myeloid differentiation in response to GM-CSF.\",\n      \"method\": \"Myeloid differentiation assays, chromatin/epigenetic analysis of Csf1r locus in 32D/WT1 cells expressing AML1-MTG16\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional differentiation assay plus epigenetic locus analysis, single lab\",\n      \"pmids\": [\"16007222\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"ETO-2 (CBFA2T3) associates with SCL in erythroid and megakaryocytic cells; in erythroid cells it additionally interacts with Gfi-1b to form a tri-partite corepressor complex; this SCL/ETO-2/Gfi-1b complex is lost during erythroid differentiation. ETO-2 exerts repressor effects on SCL target genes.\",\n      \"method\": \"Proteomic characterization of SCL complexes, co-immunoprecipitation of endogenous proteins in primary cells, genetic epistasis/knockdown in erythroid cells\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal co-IP of endogenous proteins in primary cells plus functional epistasis by genetic studies, replicated in both cell lines and primary cells\",\n      \"pmids\": [\"16287841\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"ETO2 is recruited into TAL-1/SCL complexes through interaction with E2A/HEB; ETO2 actively represses erythroid TAL-1 target genes and governs expansion of erythroid progenitors. At the onset of differentiation, a change in stoichiometry of ETO2 within the TAL-1 complex de-represses erythroid-specific target genes including Gfi-1b and p21Cip.\",\n      \"method\": \"Tagging/proteomics of TAL-1 complexes, ectopic expression and siRNA knockdown in hematopoietic progenitor cells, gene expression analysis\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mass spectrometry-based proteomics, confirmed by co-IP, functional siRNA knockdown and overexpression, multiple orthogonal methods in one study\",\n      \"pmids\": [\"16407974\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"ErbB-4 s80 intracellular domain translocates to the nucleus, colocalizes and interacts with ETO2, and blocks ETO2-mediated transcriptional repression of a heterologous promoter. This effect does not require s80 kinase activity and is mediated by the C-terminal region of s80.\",\n      \"method\": \"Co-immunoprecipitation, co-localization, transcriptional reporter assay, kinase-dead mutant analysis\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus reporter assay plus domain mapping, single lab\",\n      \"pmids\": [\"16815842\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"ZNF652 specifically interacts with CBFA2T3 through the C-terminal 109 amino acids of ZNF652; this interaction is substantially stronger than ZNF652 interactions with the other two ETO family members (CBFA2T1 and CBFA2T2). The CBFA2T3-ZNF652 complex represses transcription in reporter assays.\",\n      \"method\": \"Yeast two-hybrid screen, co-immunoprecipitation, transcriptional reporter assay\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — yeast two-hybrid plus co-IP plus reporter assay, single lab\",\n      \"pmids\": [\"16966434\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"CBFA2T3 interacts with ZNF652 via its NHR3 and NHR4 domains binding a conserved proline-rich region in the C-terminus of ZNF652; the CBFA2T3-ZNF652 corepressor complex directly represses HEB (E-box gene) by binding a single ZNF652 response element within the HEB promoter.\",\n      \"method\": \"Domain mapping, chromatin immunoprecipitation, transcriptional reporter assay, co-immunoprecipitation\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — ChIP demonstrating direct promoter occupancy plus domain mapping plus reporter assay, single lab with multiple orthogonal methods\",\n      \"pmids\": [\"18456661\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Inactivation of Mtg16 in mice skews early myeloid progenitor cells toward granulocytic/macrophage lineage while reducing megakaryocyte-erythroid progenitors, and impairs rapid expansion of short-term stem cells and multipotent progenitors under hematopoietic stress. This proliferative defect is rescued by c-Myc but not Bcl2.\",\n      \"method\": \"Mtg16 knockout mice, flow cytometry of progenitor populations, rescue by c-Myc/Bcl2 complementation\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo knockout with detailed progenitor phenotyping plus genetic complementation experiment identifying c-Myc as downstream effector\",\n      \"pmids\": [\"18710942\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"ETO2 (CBFA2T3) interacts with GATA1 in megakaryocytes; knockdown of ETO2 promotes megakaryocyte differentiation and enhances expression of terminal megakaryocyte genes including Pf4. ETO2 directly represses the Pf4 proximal promoter through GATA-binding sites and an E-Box motif, and endogenous ETO2, GATA1, and the SCL pentameric complex all occupy this promoter in vivo.\",\n      \"method\": \"Biotinylated GATA1 pull-down/proteomics, co-immunoprecipitation, ETO2 knockdown, chromatin immunoprecipitation, reporter assay\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — in vivo biotinylated protein pull-down proteomics, confirmed by multiple co-IP, ChIP, and functional knockdown across multiple methods\",\n      \"pmids\": [\"18625887\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Eto2/Mtg16 and Mtgr1 are heteromeric corepressors of TAL1/SCL in murine erythroid progenitors; they interact through the bHLH domain of Tal1 and the TAF110 domain of Eto2. Mtgr1 and Eto2 enhance each other's association with Tal1. Enforced Eto2 expression inhibits the Protein 4.2 (P4.2) gene promoter (a direct TAL1 target), and Eto2 chromatin occupancy at the P4.2 promoter decreases during differentiation in parallel with declining Eto2 protein.\",\n      \"method\": \"Tandem affinity purification/LC-MS, co-immunoprecipitation in COS-7 and MEL cells, Gal4-fusion domain mapping, GST pull-down, chromatin immunoprecipitation\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — mass spectrometry identification plus reciprocal co-IP plus domain mapping plus ChIP, multiple orthogonal methods in one study\",\n      \"pmids\": [\"19799863\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"MTG16a (CBFA2T3) localizes to the nucleolus of breast epithelial cells and functions as a ribosomal RNA (rRNA) transcription repressor that counteracts MYC-driven rRNA activation. Knockdown or nucleolar sequestration of MTG16a impairs acinar morphogenesis and increases rRNA synthesis.\",\n      \"method\": \"RNA interference knockdown, nucleolar localization studies, rRNA transcription assays, 3D acinar morphogenesis assay\",\n      \"journal\": \"Journal of cellular and molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — RNAi plus functional rRNA assay plus localization, single lab\",\n      \"pmids\": [\"19961547\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"MTG16 interacts with both CSL and the intracellular domains of Notch receptors; the Notch1 intracellular domain disrupts the MTG16-CSL interaction. Ex vivo Notch-dependent cell fate specification is impaired in Mtg16-/- hematopoietic progenitors and restored by MTG16 expression but not by an MTG16 derivative lacking the Notch intracellular domain binding site.\",\n      \"method\": \"Co-immunoprecipitation, Mtg16 knockout hematopoietic progenitor fate assays, MTG16 re-expression rescue with domain mutants\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — co-IP of endogenous complex components plus in vivo KO phenotype plus domain-specific rescue experiment, multiple orthogonal methods\",\n      \"pmids\": [\"20123979\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"CBFA2T3 forms a corepressor complex with ZNF651 (a ZNF652 paralogue) that shares the same consensus DNA binding sequence as ZNF652 and represses target gene expression, performing functionally similar roles to the CBFA2T3-ZNF652 complex in a tissue-specific manner.\",\n      \"method\": \"Reporter assay, co-immunoprecipitation, DNA binding sequence analysis\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, reporter assay plus co-IP without ChIP validation of direct target binding\",\n      \"pmids\": [\"20116376\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"ETO2 (CBFA2T3) participates in the NLI (Ldb1 homolog) complex at a site downstream of the Aγ-globin gene (BGL3 region) in human erythroid cells. When β-globin is expressed, ETO2 and BCL11A co-occupy BGL3 sequences to repress γ-globin; when γ-globin is reactivated, ETO2 participation in the NLI complex at BGL3 is diminished, LCR proximity to the BGL3/γ-globin region is established, and both BGL3 and γ-globin are transcribed.\",\n      \"method\": \"ChIP of NLI complex members, chromatin conformation capture (chromosome conformation assays), knockdown of ETO2\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — ChIP plus chromatin conformation capture plus functional knockdown, multiple orthogonal methods establishing mechanistic role in γ-globin regulation\",\n      \"pmids\": [\"22010104\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Mtg16 is required for T-cell development; Mtg16-/- LSK cells fail to produce CD4+/CD8+ cells in response to Notch signal in vitro. Complementation shows that the capacity of Mtg16 to suppress E2A-dependent transcriptional activation and to bind the Notch intracellular domain are both required for T-cell fate specification.\",\n      \"method\": \"Mtg16 knockout mice, competitive bone marrow transplantation, in vitro Notch-driven differentiation assay, domain complementation\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo KO plus competitive BMT plus in vitro differentiation rescue with domain mutants, multiple orthogonal methods\",\n      \"pmids\": [\"21536648\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"ETO2 directly regulates globin genes (HBB, HBA, ALAS2) in human erythroid cells by occupying GATA-1 target loci; ETO2 protein peaks early in erythroid differentiation and its decline contributes to activation of these targets. ETO2 overexpression represses, and shRNA knockdown de-represses, hemoglobin gene expression in primary erythroblasts.\",\n      \"method\": \"Microarray gene expression profiling, ChIP-seq integration, quantitative ChIP, shRNA knockdown and retroviral overexpression in primary erythroblasts\",\n      \"journal\": \"Experimental hematology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — ChIP-seq plus functional KD plus overexpression in primary human cells, multiple orthogonal methods\",\n      \"pmids\": [\"23127762\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"Kaiso (ZBTB33) interacts with MTG16 through its zinc finger domains; MTG16 is required for efficient repression of Kaiso target genes including MMP-7. ChIP shows MTG16 occupies the Kaiso binding site at the MMP-7 promoter, and this repression requires Kaiso to bind its DNA binding site.\",\n      \"method\": \"Yeast two-hybrid screen, co-immunoprecipitation, chromatin immunoprecipitation, transcriptional reporter assay with Kaiso binding site mutants\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — yeast two-hybrid plus co-IP plus ChIP plus reporter assay with mechanistic mutant analysis, multiple orthogonal methods\",\n      \"pmids\": [\"23251453\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Mtg16 promotes plasmacytoid dendritic cell (pDC) differentiation and restricts classical DC (cDC) development in part by directly repressing Id2; Mtg16-deficient pDCs and cDC progenitors show aberrant Id2 induction, and Id2 deletion partially rescues impaired pDC development in Mtg16-/- mice.\",\n      \"method\": \"Mtg16 knockout mice, genome-wide expression and DNA-binding analysis (ChIP), Id2 genetic epistasis (Mtg16/Id2 double KO rescue)\",\n      \"journal\": \"The Journal of experimental medicine\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genome-wide binding analysis plus in vivo KO phenotype plus genetic epistasis rescue experiment, multiple orthogonal methods\",\n      \"pmids\": [\"24980046\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"MTG16 loss promotes radioresistance in intestinal crypts and impacts intestinal stem cell function, shifting cellular response away from DNA damage-induced apoptosis toward DNA repair. Mtg16-/- crypts show increased Wnt3a-driven enterosphere formation but delayed maturation into enteroids.\",\n      \"method\": \"Mtg16 knockout mice, radiation injury model, flow cytometry for DNA damage markers, ex vivo crypt enteroid culture assays\",\n      \"journal\": \"American journal of physiology. Gastrointestinal and liver physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO with radiation model plus ex vivo organoid assays, single lab\",\n      \"pmids\": [\"25573176\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"CBFA2T3 regulates cell-fate genes establishing leukemia stem cell gene expression signatures; its transcription is activated via the NM_005187 promoter by GCN5 in non-CBF AML. The RUNX1-RUNX1T1 fusion protein transcriptionally represses this CBFA2T3 promoter. ShRNA-mediated CBFA2T3 knockdown arrests G1/S progression and attenuates AML cell proliferation in vitro and in vivo.\",\n      \"method\": \"Gene set enrichment analysis of primary samples, shRNA knockdown (in vitro and xenograft), promoter analysis with GCN5 activation and RUNX1-RUNX1T1 repression\",\n      \"journal\": \"Blood advances\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — functional shRNA in vitro and in vivo plus promoter mechanism, single lab\",\n      \"pmids\": [\"31040112\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"CBFA2T3 associates with PRDM14 in mouse leukemic cells independently of the related family member CBFA2T2; Prdm14-induced T-ALL does not occur in Cbfa2t3-deficient mice and develops with longer latency in heterozygotes, establishing that CBFA2T3 is required for PRDM14-driven leukemogenesis.\",\n      \"method\": \"Mass spectrometry protein interaction screen, co-immunoprecipitation, Cbfa2t3 knockout and heterozygous mouse leukemia model\",\n      \"journal\": \"Molecular cancer research : MCR\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — MS-identified interaction confirmed by co-IP plus genetic epistasis in vivo, single lab\",\n      \"pmids\": [\"31015254\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"ETO2 (CBFA2T3) absence in mice interferes with downregulation of PU.1 and GATA2 in fetal liver, impeding commitment to erythroid maturation. ETO2 recruits the NuRD complex via its hydrophobic heptad repeat region to regulate histone acetylation and nucleosome occupancy at the β-globin locus control region and γ-globin gene; loss of ETO2 elevates LDB1, MED1, and Pol II and facilitates fetal γ-globin/LCR looping and γ-globin transcription.\",\n      \"method\": \"Eto2 knockout mice (including human β-globin transgenic), human CD34+ cells with ETO2 reduction, ChIP-seq, chromatin conformation capture, NuRD interaction assays with hydrophobic heptad repeat deletion mutant\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Strong — in vivo KO in multiple mouse models plus human primary cells plus ChIP-seq plus chromatin conformation assays plus domain mutant demonstrating NuRD interaction, highly replicated across multiple orthogonal methods\",\n      \"pmids\": [\"32960220\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"MTG8 and MTG16 are expressed by +4/5 early intestinal progenitors (repressed by Notch/ATOH1 signaling) and repress transcription of stem cell-specific genes (Lgr5, Ascl2) and ATOH1-regulated secretory-lineage genes; MTG16-KO intestines show crypt hyperproliferation, ISC expansion, and impaired enterocyte differentiation.\",\n      \"method\": \"Lgr5-GFP sorted cell expression profiling, Mtg16/Mtg8 knockout intestinal organoids, histology, immunohistochemistry, RNA-seq, ChIP-seq of intestinal crypts\",\n      \"journal\": \"Gastroenterology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genome-wide ChIP-seq plus RNA-seq plus KO phenotype in vivo and ex vivo organoids, multiple orthogonal methods\",\n      \"pmids\": [\"32553763\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"CBFA2T3 and RUNX1 form a complex in BCP-ALL cells; RUNX1 drives expression of both RUNX1 and CBFA2T3 via an enhancer ~2 kb upstream of the CBFA2T3 promoter. CBFA2T3 strongly potentiates RUNX1 transcriptional activity (activation loop). A CBFA2T3 NHR2-mimicking peptide inhibits the RUNX1-CBFA2T3 interaction and reduces BCP-ALL proliferation in vitro and in xenograft models.\",\n      \"method\": \"ChIP-seq, co-immunoprecipitation, proximity ligation assay, luciferase reporter assay, xenograft mouse model\",\n      \"journal\": \"Journal of hematology & oncology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — ChIP-seq plus co-IP plus PLA plus reporter assay plus in vivo xenograft, multiple orthogonal methods in one study\",\n      \"pmids\": [\"33743795\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"MTG16 controls colonic epithelial differentiation and regeneration by repressing E protein-mediated transcription; a point mutation (P209T) that attenuates MTG16:E protein interactions partially phenocopies MTG16 deficiency with increased tumorigenicity, demonstrating that E protein repression is a key functional mechanism of MTG16 in the colon.\",\n      \"method\": \"Mtg16-/- and Mtg16P209T knock-in mice, DSS colitis model, azoxymethane/DSS colitis-associated cancer model, transcriptomic analysis, chromatin immunoprecipitation\",\n      \"journal\": \"JCI insight\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo KO and separation-of-function point mutant knock-in plus disease model plus transcriptomics, mechanistically rigorous\",\n      \"pmids\": [\"35503250\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"ETO2 (CBFA2T3) directly activates transcription of MYB (among other genes) at enhancers by colocalizing with EP300 and MYB, forming an ETO2/MYB feedforward transcription activation loop. EP300 acetyltransferase inhibition strongly reduces ETO2 protein, chromatin binding, and ETO2-activated transcripts.\",\n      \"method\": \"Transcriptomic and chromatin binding analyses (ChIP/CUT&RUN), controlled ETO2 depletion models, EP300 inhibition (small molecule and PROTAC)\",\n      \"journal\": \"HemaSphere\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genome-wide binding plus depletion model plus pharmacological inhibition, single lab\",\n      \"pmids\": [\"38903535\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"CBFA2T3 is a PPARA-sensitive gene in mouse liver; hepatic CBFA2T3 modulates expression of Cidea, Cd36, and Fabp1 (lipid accumulation genes) and Hspa1b and Ca5a. Loss of Cbfa2t3 in mice leads to increased insulin resistance and fasting-induced hepatic lipid accumulation.\",\n      \"method\": \"Cbfa2t3 knockout mice, PPARA ligand (WY14643) treatment, glucose and insulin tolerance tests, hepatic histology, gene expression analysis\",\n      \"journal\": \"Cells\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo KO plus metabolic phenotyping, single lab\",\n      \"pmids\": [\"38786053\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ETO2 NHR4 domain interacts with multiple polyproline-leucine motifs within GATAD2A (a NuRD complex component); oligomerization of ETO2 NHR3 enhances binding affinity for peptides containing ≥2 polyproline-leucine motifs (multivalent interaction). A peptide disrupting this interaction elevates γ-globin expression and induces differentiation of HUDEP-2 and K562 cells.\",\n      \"method\": \"Biochemical binding assays, peptide competition, enforced peptide expression in cell lines with γ-globin expression readout\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct biochemical reconstitution of ETO2-NuRD interaction plus mutant peptide functional validation, multiple orthogonal in vitro and cellular methods in one study\",\n      \"pmids\": [\"40421803\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Mtg16 interaction with E proteins (via NHR1 domain residue F210) is critical for B and T lymphopoiesis; F210A knock-in mice show impaired lymphopoiesis after competitive bone marrow transplant equivalent to Mtg16-/- mice. The Mtg16:E protein interaction is also required for normal burst-forming unit-erythroid (BFU-E) response after hemolytic stress, though Mtg16-/- mice are more severely anemic.\",\n      \"method\": \"Mtg16F210A knock-in mice, Mtg16P209T knock-in mice, competitive bone marrow transplantation, phenylhydrazine-induced hemolytic anemia model, colony-forming assays\",\n      \"journal\": \"Experimental hematology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — separation-of-function knock-in point mutation in vivo, compared to KO, in multiple hematopoietic assays; mechanistically rigorous\",\n      \"pmids\": [\"40316246\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ETO2 (via the ETO2::GLIS2 fusion) drives progressive chromatin rewiring during leukemogenesis: it aberrantly activates the osteogenic homeobox factor DLX3, which in turn increases accessibility to ETS factor motifs and reduces GATA motif accessibility. DLX3 knockout abrogates leukemia initiation in an iPSC model expressing ETO2::GLIS2.\",\n      \"method\": \"CRISPR-Cas9 genome editing of human iPSCs to create the ETO2::GLIS2 inversion, single-cell transcriptomics and chromatin accessibility profiling, DLX3 KO epistasis\",\n      \"journal\": \"Blood\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — iPSC genome-editing model plus multi-omics plus genetic epistasis, single lab, findings about the fusion protein with CBFA2T3 moiety\",\n      \"pmids\": [\"39656971\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"CBFA2T3-GLIS2 fusion protein binds genome-wide through its NHR2 domain (ETO moiety)-dependent homodimerization; loss of the NHR2 domain abrogates leukemia development and downregulates JAK/STAT, Hedgehog, and NOTCH transcriptional signatures. The fusion upregulates a network of transcription factor genes (NOTCH, Hedgehog, TGFβ, WNT pathways) by directly binding their regulatory elements.\",\n      \"method\": \"CBFA2T3-GLIS2 mouse model, genome-wide ChIP/binding mapping, NHR2 deletion mutant functional studies\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo mouse model plus genome-wide binding plus domain deletion mutant, single lab\",\n      \"pmids\": [\"39384814\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"ETO2-GLIS2 fusion oncoprotein confers megakaryocytic identity via the GLIS2 moiety while both ETO2 and GLIS2 domains are required to drive increased self-renewal. ETO2-GLIS2 directly binds DNA and controls transcription by upregulating expression and interacting with ERG at enhancer elements. Interference with ETO2-GLIS2 oligomerization reverses transcriptional activation at enhancers and promotes megakaryocytic differentiation.\",\n      \"method\": \"Domain-specific functional studies, ChIP/enhancer occupancy assays, oligomerization inhibition experiments\",\n      \"journal\": \"Cancer cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mechanistic dissection with domain-specific constructs, ChIP at enhancers, functional oligomerization interference with differentiation readout, multiple orthogonal methods\",\n      \"pmids\": [\"28292442\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"MTG16 is concentrated in the cytoplasm of erythroleukemia cell lines (human and mouse), and treatment with the CRM1 antagonist leptomycin-B causes MTG16 levels to rise in the nucleus and decline in the cytoplasm, indicating bidirectional CRM1-dependent nucleocytoplasmic shuttling.\",\n      \"method\": \"Immunofluorescence with validated α-MTG16 antibodies, leptomycin-B CRM1 inhibition, subcellular fractionation\",\n      \"journal\": \"Antibody technology journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct localization by validated antibodies plus CRM1 inhibitor experiment, single lab, abstract-level detail\",\n      \"pmids\": [\"36267145\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"MYB represses ζ-globin expression by upregulating ETO2; ETO2 functions as a novel repressor of ζ-globin through coordination with the NuRD complex to modulate histone deacetylation at the ζ-globin locus. ETO2 knockout in primary CD34+ cells from non-deletional hemoglobin H patients significantly increases ζ-globin expression.\",\n      \"method\": \"MYB knockout mouse models, MYB-knockout human cell lines, ETO2 knockout in primary CD34+ cells, multiomics (RNA-seq, ChIP), NuRD interaction analysis\",\n      \"journal\": \"Acta biochimica et biophysica Sinica\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic KO in vivo and in primary human cells plus multiomics mechanistic analysis, single lab\",\n      \"pmids\": [\"39757769\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"CBFA2T3 (ETO2/MTG16) is a transcriptional corepressor that functions within multiprotein complexes—most notably the SCL/TAL1-GATA1-LMO2-LDB1/NLI complex and NuRD complex—to repress target gene expression in hematopoietic cells; it interacts with binding partners including N-CoR, E proteins (E2A/HEB), Gfi-1b, ZNF652/ZNF651, Kaiso, Notch intracellular domain, and CSL, and it regulates erythroid maturation (including globin gene switching), megakaryocyte differentiation, lymphopoiesis (via E protein repression), dendritic cell subset balance (via Id2 repression), intestinal stem cell niche exit and lineage allocation, and hematopoietic stress responses; as a fusion oncogene (CBFA2T3-GLIS2), it drives pediatric acute megakaryoblastic leukemia by aberrantly activating transcriptional networks at enhancers through its dimerization (NHR2) domain and ERG co-occupation.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"CBFA2T3 (ETO2/MTG16) is a nuclear transcriptional corepressor that operates as a dimerizing scaffold within hematopoietic and epithelial transcription factor complexes to set the timing and direction of lineage gene expression programs [#0, #5, #24]. It is recruited into the SCL/TAL1 master regulatory complex through E proteins (E2A/HEB) and the TAL1 bHLH domain, and assembles tripartite corepressor modules with Gfi-1b and GATA1; in erythroid and megakaryocytic progenitors it represses target genes such as Gfi-1b, p21Cip, Pf4, and the globin genes (HBB, HBA, ALAS2), and a stoichiometric decline in ETO2 within the complex during differentiation de-represses these terminal genes [#4, #5, #10, #17]. Repression is executed in part by recruiting the NuRD complex via the ETO2 hydrophobic heptad/NHR domains—NHR4 engages multivalent polyproline-leucine motifs in GATAD2A, with NHR3 oligomerization enhancing affinity—to control histone acetylation and nucleosome occupancy at the β-globin LCR and γ/ζ-globin genes, governing globin switching [#23, #29, #35]. ETO2 also binds N-CoR through its MYND domain and partners with sequence-specific factors ZNF652/ZNF651, Kaiso (ZBTB33), and the Notch/CSL axis to direct context-specific repression of targets including HEB and MMP-7 [#2, #8, #18, #13]. In vivo it controls hematopoietic progenitor expansion and stress responses (downstream of c-Myc), T- and B-lymphopoiesis and dendritic cell subset balance through E protein and Notch-dependent repression of targets such as Id2, and intestinal/colonic stem cell niche exit and differentiation by repressing stem-cell and secretory-lineage genes—where the separation-of-function point mutations P209T (E protein binding) and F210A (NHR1/E protein) define E protein repression as a core mechanism [#9, #16, #19, #24, #26, #30]. Beyond corepression, CBFA2T3 acts in oncogenic contexts: it potentiates RUNX1 transcriptional activity in BCP-ALL and is required for PRDM14-driven T-ALL, and as the CBFA2T3-GLIS2/ETO2-GLIS2 fusion it drives pediatric acute megakaryoblastic leukemia through NHR2-dependent oligomerization, co-occupation of enhancers with ERG, and aberrant activation of transcription factor networks [#22, #25, #33, #32].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Established that CBFA2T3 is a nuclear protein capable of homo- and hetero-dimerization with other ETO family members, defining the dimerization architecture that underlies its later scaffolding function.\",\n      \"evidence\": \"Nuclear localization studies and dimerization mapping by domain deletion in transfected cells\",\n      \"pmids\": [\"10022820\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Did not identify physiological transcriptional partners\", \"No functional consequence of dimerization established\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Demonstrated that CBFA2T3 is an intrinsic transcriptional repressor with tumor-suppressor-like activity, the first functional assignment.\",\n      \"evidence\": \"GAL4-fusion reporter assay plus colony formation/soft agar rescue in breast cancer lines\",\n      \"pmids\": [\"12183414\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No direct target genes identified\", \"Mechanism of repression not defined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Identified N-CoR as a corepressor partner via the MYND domain and showed AML1-ETO competes for this site, linking CBFA2T3 to myeloid differentiation control.\",\n      \"evidence\": \"Co-IP and MYND-domain competition with overexpression rescue in 32Dcl3 and CD34+ cells\",\n      \"pmids\": [\"15231665\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct chromatin targets not mapped\", \"Quantitative competition with endogenous proteins unclear\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Placed CBFA2T3 inside the SCL/TAL1 transcription factor complex with Gfi-1b, establishing it as a corepressor of erythroid/megakaryocytic master regulators whose complex is dissolved during differentiation.\",\n      \"evidence\": \"Proteomics and reciprocal endogenous co-IP in primary erythroid/megakaryocytic cells with knockdown\",\n      \"pmids\": [\"16287841\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct DNA occupancy at target loci not yet shown\", \"Trigger for complex dissolution undefined\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Defined the recruitment mechanism (via E2A/HEB) and the stoichiometric-switch model in which falling ETO2 levels de-repress erythroid genes, explaining how a repressor governs differentiation timing.\",\n      \"evidence\": \"Proteomics of TAL-1 complexes plus siRNA knockdown and overexpression with expression profiling\",\n      \"pmids\": [\"16407974\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism controlling ETO2 protein decline not identified\", \"Direct vs indirect target distinction limited\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Showed CBFA2T3 repression is antagonized by the ErbB-4 s80 intracellular domain, linking receptor signaling to corepressor output.\",\n      \"evidence\": \"Co-IP, colocalization, reporter assay, kinase-dead mutant analysis\",\n      \"pmids\": [\"16815842\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Physiological context of ErbB-4/ETO2 crosstalk untested\", \"Endogenous target genes not identified\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Mapped a specific ZNF652/ZNF651 corepressor partnership (NHR3/NHR4 binding a proline-rich motif) and demonstrated direct promoter occupancy and repression of HEB, providing a sequence-specific recruitment route.\",\n      \"evidence\": \"Yeast two-hybrid, domain mapping, ChIP, and reporter assays\",\n      \"pmids\": [\"16966434\", \"18456661\", \"20116376\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide ZNF652/ETO2 target repertoire incomplete\", \"ZNF651 partnership only reporter/co-IP validated\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Established in vivo roles in hematopoiesis: Mtg16 controls myeloid-vs-MEP lineage allocation and stress progenitor expansion via a c-Myc-dependent mechanism.\",\n      \"evidence\": \"Mtg16 knockout mice with progenitor phenotyping and c-Myc/Bcl2 complementation\",\n      \"pmids\": [\"18710942\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct ETO2 targets driving the c-Myc effect not defined\", \"Cell-intrinsic vs niche contributions not fully separated\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Demonstrated direct GATA1 partnership and promoter occupancy at megakaryocyte genes (Pf4), with knockdown promoting terminal differentiation, integrating ETO2 into the GATA1/SCL pentameric complex.\",\n      \"evidence\": \"Biotinylated GATA1 pull-down proteomics, co-IP, ChIP, knockdown, reporter assay\",\n      \"pmids\": [\"18625887\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full GATA1-target genome occupancy not mapped\", \"Switch controlling repression release at differentiation unclear\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Resolved the cooperative assembly of ETO2 and Mtgr1 on TAL1 (via TAF110/bHLH domains) and showed chromatin occupancy declines with ETO2 protein during differentiation at direct targets like P4.2.\",\n      \"evidence\": \"TAP/LC-MS, co-IP, GAL4 domain mapping, GST pulldown, ChIP in MEL cells\",\n      \"pmids\": [\"19799863\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Quantitative stoichiometry in vivo not measured\", \"How Mtgr1 mutually enhances Tal1 binding unresolved\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Extended CBFA2T3 function to the nucleolus as an rRNA transcription repressor that counteracts MYC, broadening its role beyond Pol II target genes.\",\n      \"evidence\": \"RNAi knockdown, nucleolar localization, rRNA transcription and 3D acinar assays\",\n      \"pmids\": [\"19961547\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular mechanism of rDNA repression undefined\", \"Relationship to its Pol II corepressor activity unclear\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Linked CBFA2T3 to Notch signaling via CSL/Notch ICD binding and showed this interaction is required for Notch-dependent hematopoietic fate, integrating it into a major developmental pathway.\",\n      \"evidence\": \"Co-IP, Mtg16 KO progenitor fate assays, domain-specific rescue\",\n      \"pmids\": [\"20123979\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct CSL-target genes regulated by MTG16 not enumerated\", \"Notch ICD displacement kinetics not quantified\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Demonstrated requirement of MTG16 for T-cell development through dual capacity to suppress E2A-dependent activation and bind Notch ICD.\",\n      \"evidence\": \"Mtg16 KO mice, competitive BMT, Notch-driven differentiation with domain complementation\",\n      \"pmids\": [\"21536648\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct E2A/Notch co-target genes in T-progenitors not mapped\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Positioned ETO2 within the NLI/Ldb1 complex at the BGL3 region with BCL11A to repress γ-globin, mechanistically tying ETO2 to hemoglobin switching via chromatin looping.\",\n      \"evidence\": \"ChIP of NLI members, chromosome conformation capture, ETO2 knockdown\",\n      \"pmids\": [\"22010104\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Causal order of ETO2 loss vs looping not fully separated\", \"Direct ETO2-BCL11A interaction not shown\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Showed ETO2 directly occupies GATA1 globin loci and that its early peak/decline times hemoglobin gene activation in human erythroblasts.\",\n      \"evidence\": \"Microarray, ChIP-seq integration, quantitative ChIP, shRNA and overexpression in primary erythroblasts\",\n      \"pmids\": [\"23127762\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism setting ETO2 protein dynamics not defined\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Identified Kaiso (ZBTB33) as a sequence-specific recruiter directing MTG16 to repress targets like MMP-7, expanding its partner repertoire.\",\n      \"evidence\": \"Yeast two-hybrid, co-IP, ChIP, reporter assay with binding-site mutants\",\n      \"pmids\": [\"23251453\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide Kaiso/MTG16 co-targets not mapped\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Revealed CRM1-dependent nucleocytoplasmic shuttling of MTG16, indicating localization is regulated and may control availability for nuclear repression.\",\n      \"evidence\": \"Immunofluorescence with validated antibodies, leptomycin-B inhibition, fractionation\",\n      \"pmids\": [\"36267145\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of shuttling untested\", \"Signals/conditions controlling export unknown\", \"Abstract-level detail only\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Established that Mtg16 directs dendritic cell subset balance by directly repressing Id2, with genetic rescue confirming the target.\",\n      \"evidence\": \"Mtg16 KO mice, genome-wide ChIP/expression, Mtg16/Id2 double-KO epistasis\",\n      \"pmids\": [\"24980046\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Other DC-relevant direct targets not detailed\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Implicated MTG16 in intestinal stem cell function and the DNA-damage response, shifting crypt cells between apoptosis and repair after radiation.\",\n      \"evidence\": \"Mtg16 KO mice, radiation model, DNA-damage flow cytometry, crypt enteroid assays\",\n      \"pmids\": [\"25573176\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct transcriptional targets controlling repair-vs-apoptosis not identified\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Showed CBFA2T3 establishes leukemia stem cell signatures in non-CBF AML and that its promoter is activated by GCN5 and repressed by RUNX1-RUNX1T1, with knockdown arresting cell cycle.\",\n      \"evidence\": \"GSEA, shRNA in vitro and xenograft, promoter analysis\",\n      \"pmids\": [\"31040112\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct CBFA2T3 leukemic targets incompletely defined\", \"Whether it acts as repressor or activator here unresolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Identified PRDM14 as a partner and demonstrated CBFA2T3 is genetically required for PRDM14-driven T-ALL, an oncogenic dependency distinct from its corepressor partners.\",\n      \"evidence\": \"MS interaction screen, co-IP, Cbfa2t3 KO/heterozygous leukemia models\",\n      \"pmids\": [\"31015254\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Target genes of the PRDM14-CBFA2T3 complex not mapped\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Defined the NuRD-recruitment mechanism (hydrophobic heptad repeat) by which ETO2 controls histone acetylation, nucleosome occupancy, and LCR/γ-globin looping, and showed its requirement for erythroid commitment via PU.1/GATA2 downregulation.\",\n      \"evidence\": \"Eto2 KO mice (β-globin transgenic), human CD34+ reduction, ChIP-seq, 3C, NuRD interaction with heptad-deletion mutant\",\n      \"pmids\": [\"32960220\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Precise NuRD subunit contact not yet resolved at this stage\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Extended MTG16 function to intestinal epithelium, repressing stem-cell (Lgr5, Ascl2) and ATOH1 secretory-lineage genes downstream of Notch, controlling crypt proliferation and differentiation.\",\n      \"evidence\": \"Lgr5-GFP profiling, Mtg16/Mtg8 KO organoids, RNA-seq, ChIP-seq of crypts\",\n      \"pmids\": [\"32553763\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cooperation/redundancy with MTG8 partially resolved\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Showed CBFA2T3 potentiates rather than represses RUNX1 in BCP-ALL within a feedforward enhancer loop, and that an NHR2-mimicking peptide disrupts the interaction and reduces tumor growth.\",\n      \"evidence\": \"ChIP-seq, co-IP, PLA, reporter assay, xenograft\",\n      \"pmids\": [\"33743795\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism switching CBFA2T3 from repressor to coactivator context-dependent and not fully defined\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Used a separation-of-function point mutant (P209T) to prove that E protein repression is a central mechanism of MTG16 in colonic differentiation and tumor suppression.\",\n      \"evidence\": \"Mtg16-/- and Mtg16P209T knock-in mice, colitis and colitis-associated cancer models, transcriptomics, ChIP\",\n      \"pmids\": [\"35503250\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full set of E protein targets in colon not enumerated\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Revealed an unexpected activating role in which ETO2 colocalizes with EP300 and MYB at enhancers in a feedforward loop, with EP300 acetyltransferase activity stabilizing ETO2 protein and chromatin binding.\",\n      \"evidence\": \"Transcriptomics, ChIP/CUT&RUN, ETO2 depletion, EP300 small-molecule and PROTAC inhibition\",\n      \"pmids\": [\"38903535\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Cellular context determining activation vs repression unresolved\", \"Direct EP300-ETO2 contact not biochemically mapped\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Demonstrated the CBFA2T3-GLIS2 fusion drives leukemia through NHR2-dependent homodimerization and direct binding of transcription factor regulatory elements, activating NOTCH/Hedgehog/TGFβ/WNT/JAK-STAT networks.\",\n      \"evidence\": \"CBFA2T3-GLIS2 mouse model, genome-wide binding, NHR2 deletion mutant\",\n      \"pmids\": [\"39384814\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs indirect targets within the network not fully separated\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Provided biochemical resolution of the ETO2-NuRD interface: NHR4 binds multivalent polyproline-leucine motifs in GATAD2A, with NHR3 oligomerization boosting affinity, and a disrupting peptide elevates γ-globin.\",\n      \"evidence\": \"Biochemical binding assays, peptide competition, enforced peptide expression in HUDEP-2/K562\",\n      \"pmids\": [\"40421803\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo validation of the peptide's therapeutic potential pending\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Defined the NHR1 residue F210 as critical for E protein binding and lymphopoiesis using a separation-of-function knock-in, distinguishing E protein-dependent from -independent ETO2 functions in hematopoietic stress.\",\n      \"evidence\": \"Mtg16F210A and P209T knock-in mice, competitive BMT, phenylhydrazine hemolysis model, colony assays\",\n      \"pmids\": [\"40316246\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Identity of E protein-independent functions contributing to severe anemia unresolved\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Identified ETO2 as a MYB-induced repressor of ζ-globin via NuRD-mediated histone deacetylation, extending its globin-switching role to the α-cluster with therapeutic relevance for hemoglobin H disease.\",\n      \"evidence\": \"MYB KO mouse and cell models, ETO2 KO in patient CD34+ cells, multiomics, NuRD interaction analysis\",\n      \"pmids\": [\"39757769\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct ETO2 occupancy at ζ-globin locus quantification limited\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Showed the ETO2::GLIS2 fusion progressively rewires chromatin by activating DLX3, which redistributes ETS/GATA motif accessibility and is required for leukemia initiation.\",\n      \"evidence\": \"CRISPR-engineered iPSC ETO2::GLIS2 model, single-cell multi-omics, DLX3 KO epistasis\",\n      \"pmids\": [\"39656971\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How DLX3 mechanistically alters factor accessibility not fully defined\", \"Single-lab model system\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"What molecular switch converts CBFA2T3 between corepressor (NuRD/N-CoR-recruiting) and coactivator (EP300/RUNX1-potentiating) modes, and what regulates its protein-level dynamics and CRM1-dependent localization, remains unresolved.\",\n      \"evidence\": \"No single study in the timeline reconciles its opposing transcriptional outputs across contexts\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Context-determinant for activation vs repression unknown\", \"Post-translational control of ETO2 protein abundance undefined\", \"Structural basis for switching not established\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [1, 4, 5, 8, 10, 17, 24, 27]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [10, 32, 33]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [5, 11, 23, 29]},\n      {\"term_id\": \"GO:0042393\", \"supporting_discovery_ids\": [23, 35]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 34]},\n      {\"term_id\": \"GO:0005730\", \"supporting_discovery_ids\": [12]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [34]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [5, 8, 10, 17, 24]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [3, 23, 24, 35]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [9, 13, 16, 19, 24]},\n      {\"term_id\": \"R-HSA-168256\", \"supporting_discovery_ids\": [9, 16, 19, 30]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [21, 22, 32, 33]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [13, 16]}\n    ],\n    \"complexes\": [\n      \"SCL/TAL1 transcription complex\",\n      \"NuRD complex\",\n      \"NLI/LDB1 complex\",\n      \"N-CoR corepressor complex\"\n    ],\n    \"partners\": [\n      \"TAL1\",\n      \"GATA1\",\n      \"E2A/HEB\",\n      \"Gfi-1b\",\n      \"ZNF652\",\n      \"ZBTB33\",\n      \"GATAD2A\",\n      \"RUNX1\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}