{"gene":"ESS2","run_date":"2026-06-09T23:54:43","timeline":{"discoveries":[{"year":1997,"finding":"DGSI (ESS2) encodes a conserved 476-amino acid nuclear protein within the minimal DiGeorge syndrome critical region (MDGCR) on chromosome 22q11.2. The gene spans 11 kb of genomic DNA with 10 exons and 9 introns, and its mouse ortholog (Dgsi) maps to proximal chromosome 16 with 93.2% protein identity. Eight sequence variants were identified in DGS/VCFS patients without detectable 22q11.2 deletions, though most were also found in normal controls.","method":"Genomic sequencing, cDNA cloning, exon-intron boundary analysis, mutation analysis in patients","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct genomic/cDNA characterization with structural analysis; single lab but multiple orthogonal methods (sequencing, comparative genomics, patient mutation screening)","pmids":["9063747"],"is_preprint":false},{"year":1998,"finding":"The mouse Es2-encoded protein contains a predicted coiled-coil domain and localizes to the nucleus, as demonstrated by transfection of an Es2-GFP fusion construct. The gene produces two transcript forms via alternative polyadenylation and is highly expressed during mouse embryogenesis from E7 onwards, with highest expression in the nervous system including a sub-region of the pons.","method":"GFP fusion protein transfection with fluorescence microscopy for nuclear localization; in situ hybridization for expression pattern; structural analysis programs for coiled-coil prediction","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct nuclear localization by GFP fusion transfection plus developmental expression by in situ hybridization; single lab, two orthogonal methods","pmids":["9499415"],"is_preprint":false},{"year":2001,"finding":"The fission yeast ESS2 ortholog Bis1 physically interacts with Ish1, a nuclear envelope protein whose expression is regulated by the Spc1 MAPK pathway through Atf1. Both bis1-null and ish1-null cells exhibit reduced viability in stationary phase. Overexpression of Bis1 causes a cell elongation phenotype.","method":"GFP random insertional mutagenesis screen, protein interaction assay, genetic analysis of null mutants in stationary phase survival","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — protein interaction identified in yeast ortholog study with functional validation via null mutant phenotype; single lab, two orthogonal methods (interaction assay + genetic phenotype)","pmids":["11751918"],"is_preprint":false},{"year":2014,"finding":"C. elegans ESS-2 (homolog of human ES2/DGCR14) promotes accurate mRNA splicing when a splice site is compromised. Loss of function in ess-2 suppresses the rpm-1 locomotor defect only when a dlk-1 splice acceptor mutation is present, demonstrating that ESS-2 acts to rescue aberrant splicing at compromised splice sites in a context-specific manner.","method":"Suppressor genetic screen in C. elegans, double-mutant epistasis analysis, ultrastructural synapse analysis","journal":"Genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis with defined molecular context (splice acceptor mutation); single lab but multiple orthogonal methods (genetic screen, epistasis, ultrastructure)","pmids":["25194163"],"is_preprint":false},{"year":2018,"finding":"Mouse Ess2 (Dgcr14) bridges transcriptional regulators and spliceosomal complexes via distinct domains: the N-terminal domain (amino acids 1–200) associates with the transcription factor RORγ/γt but not snRNAs, while the C-terminal region (amino acids 200–476) is required for association with U6, U1, and U4 snRNAs of the spliceosome. Ess2 knockdown abrogated the interaction between spliceosomes and RORs, and an Ess2-dependent association was found between the lncRNA Rmrp and RORs.","method":"RNA immunoprecipitation (RIP) assays with Ess2 deletion mutants, Ess2 knockdown in T cell hybridoma, domain mapping experiments","journal":"Biochemical and biophysical research communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — domain-mapping RIP with deletion mutants plus knockdown functional validation; single lab, two orthogonal methods","pmids":["29454968"],"is_preprint":false},{"year":2022,"finding":"Conditional knockout of Ess2 specifically in CD4+ T cells (Ess2ΔCD4/ΔCD4 mice) results in reduced naïve T-cell numbers in the spleen without affecting thymocyte numbers, decreased NKT cells, and increased γδT cells. Ess2 enhances the transcriptional activity of c-Myc, and Ess2-deficient naïve CD4+ T cells fail to maintain survival in response to IL-7, placing Ess2 in the Myc and IL-7 signaling pathways controlling post-thymic T-cell survival.","method":"Conditional Ess2 knockout using Cre/loxP system, RNA-seq genome-wide expression analysis, flow cytometry, transcriptional activity assays","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional KO mouse model with defined cellular phenotypes, RNA-seq, and functional c-Myc transcriptional assay; multiple orthogonal methods in single rigorous study","pmids":["35933014"],"is_preprint":false},{"year":2023,"finding":"ESS2 acts as a transcriptional coregulator in prostate cancer cells by recruiting chromodomain helicase DNA binding protein 1 (CHD1). ESS2 knockdown reduced NF-κB/CHD1 recruitment and histone H3K36me3 levels on promoters of target genes (TNF and CCL2). ESS2 also enhanced transcriptional activities of NF-κB, NFAT, and SMAD2/3. Tamoxifen-inducible Ess2 knockout mice showed delayed prostate development with hypoplasia.","method":"ESS2 knockdown in PC3 cells with xenograft tumor assay, microarray analysis, ChIP assay (NF-κB/CHD1 recruitment and H3K36me3), transcriptional activity reporter assays, tamoxifen-inducible conditional KO mice","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods in single study: xenograft KD, microarray, ChIP for histone marks and co-factor recruitment, transcriptional reporter assays, and in vivo conditional KO","pmids":["37524814"],"is_preprint":false},{"year":2025,"finding":"Review synthesis: ESS2 is a component of the spliceosomal C and C* complexes (containing U2, U5, U6 snRNAs) and also interacts with U1 snRNP. ESS2 has a conserved coiled-coil 'Es domain' from yeast to humans and regulates mRNA splicing and transcriptional activity through interactions with transcription factors; ESS2-dependent gene expression regulation is cell type-selective. ESS2 knockout mice are embryonic lethal at an early stage.","method":"Review of published experimental findings","journal":"International journal of molecular sciences","confidence":"Low","confidence_rationale":"Tier 4 / Weak — review paper synthesizing prior findings; no new primary experiments reported","pmids":["40362295"],"is_preprint":false}],"current_model":"ESS2 (DGCR14) is a conserved nuclear protein with a coiled-coil domain that functions as a dual-activity factor bridging spliceosomal complexes (via its C-terminal domain, which associates with U1, U4, and U6 snRNAs as part of the C/C* spliceosome) and transcriptional regulators (via its N-terminal domain, which interacts with RORγ/γt, c-Myc, NF-κB, NFAT, and SMAD2/3), thereby coupling pre-mRNA splicing to transcription in a cell-type-selective manner; in T cells it is required for post-thymic naïve CD4+ T-cell survival through the Myc and IL-7 pathways, and in prostate epithelium it controls development and cancer progression through CHD1 recruitment and H3K36me3 deposition at target gene promoters."},"narrative":{"mechanistic_narrative":"ESS2 (DGCR14) is a conserved nuclear coiled-coil protein, encoded within the minimal DiGeorge syndrome critical region on chromosome 22q11.2, that couples pre-mRNA splicing to transcription [PMID:9063747, PMID:9499415, PMID:29454968]. It functions as a bridging factor through two functionally distinct domains: an N-terminal region (amino acids 1–200) that associates with transcription factors such as RORγ/γt, and a C-terminal region (amino acids 200–476) required for association with U6, U1, and U4 snRNAs of the spliceosome; knockdown of Ess2 abrogates the interaction between spliceosomes and RORs and disrupts an Ess2-dependent association between the lncRNA Rmrp and RORs [PMID:29454968]. This dual activity is deployed in a cell-type-selective manner. In CD4+ T cells, Ess2 enhances c-Myc transcriptional activity and is required for IL-7-dependent survival of post-thymic naïve T cells, with its conditional loss reducing naïve and NKT cell numbers and elevating γδ T cells [PMID:35933014]. In prostate epithelium, ESS2 acts as a transcriptional coregulator by recruiting CHD1 and enhancing NF-κB, NFAT, and SMAD2/3 activity, driving NF-κB/CHD1 recruitment and H3K36me3 deposition at target promoters including TNF and CCL2, and its loss delays prostate development and limits cancer progression [PMID:37524814]. Functional conservation extends across species, where orthologs support accurate splicing at compromised splice sites and nuclear-envelope-associated stationary-phase survival [PMID:11751918, PMID:25194163].","teleology":[{"year":1997,"claim":"Establishing that ESS2 maps to the DiGeorge critical region defined the gene as a candidate contributor to a developmental syndrome and provided its structural foundation.","evidence":"Genomic sequencing, cDNA cloning, and patient mutation screening of the 22q11.2 region","pmids":["9063747"],"confidence":"Medium","gaps":["Patient variants were largely found in controls, leaving no causative mutation established","No protein function assigned"]},{"year":1998,"claim":"Defining subcellular localization and domain architecture established ESS2 as a nuclear coiled-coil protein with developmental expression, narrowing its likely sphere of action.","evidence":"GFP-fusion transfection microscopy and in situ hybridization in mouse","pmids":["9499415"],"confidence":"Medium","gaps":["No molecular partners identified","Functional role of the coiled-coil domain unknown"]},{"year":2001,"claim":"Identification of a physical partner in the fission yeast ortholog linked ESS2 to the nuclear envelope and stationary-phase viability, the first interaction-based functional clue.","evidence":"GFP insertional mutagenesis screen, interaction assay, and null-mutant phenotyping in S. pombe","pmids":["11751918"],"confidence":"Medium","gaps":["Mechanism connecting Bis1 to splicing/transcription not addressed","Human ortholog interaction not tested"]},{"year":2014,"claim":"Genetic epistasis in C. elegans first tied ESS2 directly to mRNA splicing, showing it rescues aberrant splicing at compromised splice sites.","evidence":"Suppressor genetic screen and double-mutant epistasis with a dlk-1 splice acceptor mutation","pmids":["25194163"],"confidence":"Medium","gaps":["Biochemical mechanism of splice-site rescue not defined","No spliceosomal component interaction shown"]},{"year":2018,"claim":"Domain-mapping showed how ESS2 physically bridges spliceosomal snRNAs and transcription factors, defining its dual-activity molecular architecture.","evidence":"RNA immunoprecipitation with deletion mutants and knockdown in a T cell hybridoma","pmids":["29454968"],"confidence":"Medium","gaps":["Direct vs. indirect RNA contacts not resolved","Stoichiometry within the spliceosome unknown"]},{"year":2022,"claim":"A conditional knockout placed Ess2 in a defined physiological pathway, showing it sustains post-thymic naïve CD4+ T-cell survival via c-Myc and IL-7.","evidence":"CD4-specific Cre/loxP knockout, RNA-seq, flow cytometry, and c-Myc transcriptional assays in mouse","pmids":["35933014"],"confidence":"High","gaps":["Whether splicing activity underlies the T-cell phenotype not separated from transcriptional role","Direct c-Myc binding mechanism unresolved"]},{"year":2023,"claim":"Demonstrating CHD1 recruitment and H3K36me3 deposition established a concrete chromatin-level mechanism for ESS2 transcriptional coregulation in prostate development and cancer.","evidence":"PC3 knockdown with xenografts, microarray, ChIP for CHD1/NF-κB and H3K36me3, reporter assays, and tamoxifen-inducible KO mice","pmids":["37524814"],"confidence":"High","gaps":["Whether ESS2 directly binds CHD1 or acts via intermediates not resolved","Link between this transcriptional role and the spliceosomal association not mechanistically connected"]},{"year":null,"claim":"How ESS2 selects target genes in a cell-type-specific manner and mechanistically integrates its splicing and transcriptional activities remains unresolved.","evidence":"","pmids":[],"confidence":"Low","gaps":["No structural model of ESS2 within the C/C* spliceosome","Determinants of cell-type-selective gene targeting unknown","Embryonic lethality of full knockout precludes whole-animal loss-of-function analysis"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[5,6]},{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[4]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[4]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,1]}],"pathway":[{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[4]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[6]}],"complexes":["spliceosomal C/C* complex"],"partners":["RORC","CHD1","MYC","NFKB1","NFATC1","SMAD2","SMAD3"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q96DF8","full_name":"Splicing factor ESS-2 homolog","aliases":["DiGeorge syndrome critical region 13","DiGeorge syndrome critical region 14","DiGeorge syndrome protein H","DGS-H","Protein ES2"],"length_aa":476,"mass_kda":52.6,"function":"May be involved in pre-mRNA splicing","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q96DF8/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/ESS2","classification":"Common Essential","n_dependent_lines":1174,"n_total_lines":1208,"dependency_fraction":0.9718543046357616},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/ESS2","total_profiled":1310},"omim":[{"mim_id":"608866","title":"FRA10A-ASSOCIATED CGG REPEAT 1; FRA10AC1","url":"https://www.omim.org/entry/608866"},{"mim_id":"601755","title":"ESS2 SPLICING FACTOR HOMOLOG; ESS2","url":"https://www.omim.org/entry/601755"},{"mim_id":"301024","title":"INTELLECTUAL DEVELOPMENTAL DISORDER, X-LINKED 108; XLID108","url":"https://www.omim.org/entry/301024"},{"mim_id":"300368","title":"SOLUTE CARRIER FAMILY 9, MEMBER 7; SLC9A7","url":"https://www.omim.org/entry/300368"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"}],"tissue_specificity":"Tissue enhanced","tissue_distribution":"Detected in many","driving_tissues":[{"tissue":"brain","ntpm":4.7}],"url":"https://www.proteinatlas.org/search/ESS2"},"hgnc":{"alias_symbol":["DGSI","Es2el","ES2","DGS-H","ESS-2","bis1"],"prev_symbol":["DGCR13","DGCR14"]},"alphafold":{"accession":"Q96DF8","domains":[{"cath_id":"-","chopping":"35-93_145-180","consensus_level":"medium","plddt":87.5662,"start":35,"end":180},{"cath_id":"1.20.5","chopping":"354-381","consensus_level":"medium","plddt":89.8136,"start":354,"end":381}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96DF8","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q96DF8-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q96DF8-F1-predicted_aligned_error_v6.png","plddt_mean":67.25},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ESS2","jax_strain_url":"https://www.jax.org/strain/search?query=ESS2"},"sequence":{"accession":"Q96DF8","fasta_url":"https://rest.uniprot.org/uniprotkb/Q96DF8.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q96DF8/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q96DF8"}},"corpus_meta":[{"pmid":"27630128","id":"PMC_27630128","title":"Reduction of selenite to Se(0) nanoparticles by filamentous bacterium Streptomyces sp. ES2-5 isolated from a selenium mining soil.","date":"2016","source":"Microbial cell factories","url":"https://pubmed.ncbi.nlm.nih.gov/27630128","citation_count":62,"is_preprint":false},{"pmid":"12298089","id":"PMC_12298089","title":"A protein molecular weight map of ES2 clear cell ovarian carcinoma cells using a two-dimensional liquid separations/mass mapping technique.","date":"2002","source":"Electrophoresis","url":"https://pubmed.ncbi.nlm.nih.gov/12298089","citation_count":47,"is_preprint":false},{"pmid":"22673517","id":"PMC_22673517","title":"Suppression of cellular invasion by glybenclamide through inhibited secretion of platelet-derived growth factor in ovarian clear cell carcinoma ES-2 cells.","date":"2012","source":"FEBS letters","url":"https://pubmed.ncbi.nlm.nih.gov/22673517","citation_count":40,"is_preprint":false},{"pmid":"9063747","id":"PMC_9063747","title":"Structural and mutational analysis of a conserved gene (DGSI) from the minimal DiGeorge syndrome critical region.","date":"1997","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/9063747","citation_count":36,"is_preprint":false},{"pmid":"170908","id":"PMC_170908","title":"Esterase-6 (Es-6) in laboratory mice: hormone-influenced expression and linkage relationship to oligosyndactylism (Os), esterase-1 (Es-1), and esterase-2 (Es-2) in chromosome 8.","date":"1975","source":"Biochemical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/170908","citation_count":35,"is_preprint":false},{"pmid":"10762638","id":"PMC_10762638","title":"Luteinizing hormone-releasing hormone as an autocrine growth factor in ES-2 ovarian cancer cell line.","date":"2000","source":"International journal of oncology","url":"https://pubmed.ncbi.nlm.nih.gov/10762638","citation_count":34,"is_preprint":false},{"pmid":"1180877","id":"PMC_1180877","title":"Esterase. XXI. Es-9, a possibly new polymorphic esterase in Mus musculus genetically linked to es-2.","date":"1975","source":"Biochemical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/1180877","citation_count":34,"is_preprint":false},{"pmid":"11751918","id":"PMC_11751918","title":"The fission yeast ES2 homologue, Bis1, interacts with the Ish1 stress-responsive nuclear envelope protein.","date":"2001","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/11751918","citation_count":31,"is_preprint":false},{"pmid":"9305911","id":"PMC_9305911","title":"Purification and characterization of a neutral, bile salt-independent retinyl ester hydrolase from rat liver microsomes. Relationship To rat carboxylesterase ES-2.","date":"1997","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/9305911","citation_count":31,"is_preprint":false},{"pmid":"32126843","id":"PMC_32126843","title":"Diet-Derived Gallated Catechins Prevent TGF-β-Mediated Epithelial-Mesenchymal Transition, Cell Migration and Vasculogenic Mimicry in Chemosensitive ES-2 Ovarian Cancer Cells.","date":"2020","source":"Nutrition and cancer","url":"https://pubmed.ncbi.nlm.nih.gov/32126843","citation_count":29,"is_preprint":false},{"pmid":"11494038","id":"PMC_11494038","title":"Targeting of doxorubicin to ES-2 human ovarian cancers in nude mice by linking to an analog of luteinizing hormone-releasing hormone improves its effectiveness.","date":"2001","source":"International journal of oncology","url":"https://pubmed.ncbi.nlm.nih.gov/11494038","citation_count":28,"is_preprint":false},{"pmid":"18849110","id":"PMC_18849110","title":"The inhibitory effect of norepinephrine on the migration of ES-2 ovarian carcinoma cells involves a Rap1-dependent pathway.","date":"2008","source":"Cancer letters","url":"https://pubmed.ncbi.nlm.nih.gov/18849110","citation_count":28,"is_preprint":false},{"pmid":"31605927","id":"PMC_31605927","title":"Adapalene inhibits ovarian cancer ES-2 cells growth by targeting glutamic-oxaloacetic transaminase 1.","date":"2019","source":"Bioorganic chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/31605927","citation_count":27,"is_preprint":false},{"pmid":"12394258","id":"PMC_12394258","title":"Effective treatment of experimental ES-2 human ovarian cancers with a cytotoxic analog of luteinizing hormone-releasing hormone AN-207.","date":"2002","source":"Anti-cancer drugs","url":"https://pubmed.ncbi.nlm.nih.gov/12394258","citation_count":26,"is_preprint":false},{"pmid":"9499415","id":"PMC_9499415","title":"ES2, a gene deleted in DiGeorge syndrome, encodes a nuclear protein and is expressed during early mouse development, where it shares an expression domain with a Goosecoid-like gene.","date":"1998","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/9499415","citation_count":25,"is_preprint":false},{"pmid":"30170067","id":"PMC_30170067","title":"Hyaluronic acid-endostatin2-alft1 (HA-ES2-AF) nanoparticle-like conjugate for the target treatment of diseases.","date":"2018","source":"Journal of controlled release : official journal of the Controlled Release Society","url":"https://pubmed.ncbi.nlm.nih.gov/30170067","citation_count":24,"is_preprint":false},{"pmid":"34751242","id":"PMC_34751242","title":"New Peptide-Drug Conjugates for Precise Targeting of SORT1-Mediated Vasculogenic Mimicry in the Tumor Microenvironment of TNBC-Derived MDA-MB-231 Breast and Ovarian ES-2 Clear Cell Carcinoma Cells.","date":"2021","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/34751242","citation_count":23,"is_preprint":false},{"pmid":"11485826","id":"PMC_11485826","title":"Inhibition of growth of ES-2 human ovarian cancers by bombesin antagonist RC-3095, and luteinizing hormone-releasing hormone antagonist Cetrorelix.","date":"2001","source":"Cancer letters","url":"https://pubmed.ncbi.nlm.nih.gov/11485826","citation_count":23,"is_preprint":false},{"pmid":"25194163","id":"PMC_25194163","title":"Systematic analyses of rpm-1 suppressors reveal roles for ESS-2 in mRNA splicing in Caenorhabditis elegans.","date":"2014","source":"Genetics","url":"https://pubmed.ncbi.nlm.nih.gov/25194163","citation_count":22,"is_preprint":false},{"pmid":"11272290","id":"PMC_11272290","title":"In vitro targeting of a cytotoxic analog of luteinizing hormone-releasing hormone AN-207 to ES-2 human ovarian cancer cells as demonstrated by microsatellite analyses.","date":"2001","source":"Anti-cancer drugs","url":"https://pubmed.ncbi.nlm.nih.gov/11272290","citation_count":22,"is_preprint":false},{"pmid":"31862352","id":"PMC_31862352","title":"Metabolism of 17β-estradiol by Novosphingobium sp. ES2-1 as probed via HRMS combined with 13C3-labeling.","date":"2019","source":"Journal of hazardous materials","url":"https://pubmed.ncbi.nlm.nih.gov/31862352","citation_count":21,"is_preprint":false},{"pmid":"17487111","id":"PMC_17487111","title":"Physiological responses of ES-2 ovarian cell line following administration of epigallocatechin-3-gallate (EGCG), thymoquinone (TQ), and selenium (SE).","date":"2007","source":"Biomedical sciences instrumentation","url":"https://pubmed.ncbi.nlm.nih.gov/17487111","citation_count":21,"is_preprint":false},{"pmid":"24184907","id":"PMC_24184907","title":"The immune-enhancing effect of the Cronobacter sakazakii ES2 phage results in the activation of nuclear factor-κB and dendritic cell maturation via the activation of IL-12p40 in the mouse bone marrow.","date":"2013","source":"Immunology letters","url":"https://pubmed.ncbi.nlm.nih.gov/24184907","citation_count":19,"is_preprint":false},{"pmid":"26698565","id":"PMC_26698565","title":"Coumestrol suppresses proliferation of ES2 human epithelial ovarian cancer cells.","date":"2015","source":"The Journal of endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/26698565","citation_count":17,"is_preprint":false},{"pmid":"27577911","id":"PMC_27577911","title":"Study on glyco-modification of endostatin-derived synthetic peptide endostatin2 (ES2) by soluble chitooligosaccharide.","date":"2016","source":"Carbohydrate polymers","url":"https://pubmed.ncbi.nlm.nih.gov/27577911","citation_count":15,"is_preprint":false},{"pmid":"29454968","id":"PMC_29454968","title":"Ess2 bridges transcriptional regulators and spliceosomal complexes via distinct interacting domains.","date":"2018","source":"Biochemical and biophysical research communications","url":"https://pubmed.ncbi.nlm.nih.gov/29454968","citation_count":14,"is_preprint":false},{"pmid":"30658804","id":"PMC_30658804","title":"Effects of the anti-angiogenic carbohydrate-peptide conjugate, chitooligosaccharide-ES2 on endothelial cells and tumor-bearing mice.","date":"2018","source":"Carbohydrate polymers","url":"https://pubmed.ncbi.nlm.nih.gov/30658804","citation_count":14,"is_preprint":false},{"pmid":"6517849","id":"PMC_6517849","title":"Esterase-23 (ES-23): characterization of a new carboxylesterase isozyme (EC 3.1.1.1) of the house mouse, genetically linked to ES-2 on chromosome 8.","date":"1984","source":"Biochemical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/6517849","citation_count":14,"is_preprint":false},{"pmid":"35933014","id":"PMC_35933014","title":"Transcriptional coregulator Ess2 controls survival of post-thymic CD4+ T cells through the Myc and IL-7 signaling pathways.","date":"2022","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/35933014","citation_count":12,"is_preprint":false},{"pmid":"39137549","id":"PMC_39137549","title":"Strengthening bioremediation potential: Enterobacter ludwigii ES2 for combined nicosulfuron and Cd contamination through whole genome and microbial diversity community analysis.","date":"2024","source":"Journal of hazardous materials","url":"https://pubmed.ncbi.nlm.nih.gov/39137549","citation_count":12,"is_preprint":false},{"pmid":"29122696","id":"PMC_29122696","title":"ES2 enhances the efficacy of chemotherapeutic agents in ABCB1-overexpressing cancer cells in vitro and in vivo.","date":"2017","source":"Pharmacological research","url":"https://pubmed.ncbi.nlm.nih.gov/29122696","citation_count":12,"is_preprint":false},{"pmid":"21931999","id":"PMC_21931999","title":"Genomic sequence analysis of virulent Cronobacter sakazakii bacteriophage ES2.","date":"2011","source":"Archives of virology","url":"https://pubmed.ncbi.nlm.nih.gov/21931999","citation_count":12,"is_preprint":false},{"pmid":"33017609","id":"PMC_33017609","title":"Functional targeting of the TGF-βR1 kinase domain and downstream signaling: A role for the galloyl moiety of green tea-derived catechins in ES-2 ovarian clear cell carcinoma.","date":"2020","source":"The Journal of nutritional biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/33017609","citation_count":12,"is_preprint":false},{"pmid":"3021197","id":"PMC_3021197","title":"Hydrolysis of peptides by carboxypeptidase A: equilibrium trapping of the ES2 intermediate.","date":"1986","source":"Biochemistry","url":"https://pubmed.ncbi.nlm.nih.gov/3021197","citation_count":12,"is_preprint":false},{"pmid":"31040673","id":"PMC_31040673","title":"Characterization and bioactivity of self-assembled anti-angiogenic chondroitin sulfate-ES2-AF nanoparticle conjugate.","date":"2019","source":"International journal of nanomedicine","url":"https://pubmed.ncbi.nlm.nih.gov/31040673","citation_count":11,"is_preprint":false},{"pmid":"30600066","id":"PMC_30600066","title":"Characterization, bioactivity and pharmacokinetic study of a novel carbohydrate-peptide polymer: Glycol-split heparin-endostatin2 (GSHP-ES2).","date":"2018","source":"Carbohydrate polymers","url":"https://pubmed.ncbi.nlm.nih.gov/30600066","citation_count":9,"is_preprint":false},{"pmid":"31219021","id":"PMC_31219021","title":"Improved Stability and Enhanced Anti-Tumor Activity of Hyaluronic Acid Modified ES2-AF Nanoparticle-Like Conjugate.","date":"2019","source":"Journal of biomedical nanotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/31219021","citation_count":7,"is_preprint":false},{"pmid":"40712004","id":"PMC_40712004","title":"Enhanced Biodegradation Potential of Enterobacter ludwigii ES2 to Nicosulfuron Using Metabolomics Analysis, Functional Gene El-puuE, and γ-Aminobutyric Acid.","date":"2025","source":"Journal of agricultural and food chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/40712004","citation_count":7,"is_preprint":false},{"pmid":"39636603","id":"PMC_39636603","title":"Fe(III)-Aided Novosphingobium sp. ES2-1 Regulates Molecular Mechanisms of 17β-Estradiol Biodegradation.","date":"2024","source":"Environmental science & technology","url":"https://pubmed.ncbi.nlm.nih.gov/39636603","citation_count":6,"is_preprint":false},{"pmid":"37717446","id":"PMC_37717446","title":"Adaptive responses and metabolic strategies of Novosphingobium sp. ES2-1-17β-estradiol analyzed through integration of genomic and proteomic approaches.","date":"2023","source":"Journal of hazardous materials","url":"https://pubmed.ncbi.nlm.nih.gov/37717446","citation_count":5,"is_preprint":false},{"pmid":"35847655","id":"PMC_35847655","title":"Characteristics of Mycoplasma hyopneumoniae Strain ES-2 Isolated From Chinese Native Black Pig Lungs.","date":"2022","source":"Frontiers in veterinary science","url":"https://pubmed.ncbi.nlm.nih.gov/35847655","citation_count":5,"is_preprint":false},{"pmid":"37524814","id":"PMC_37524814","title":"ESS2 controls prostate cancer progression through recruitment of chromodomain helicase DNA binding protein 1.","date":"2023","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/37524814","citation_count":4,"is_preprint":false},{"pmid":"27797222","id":"PMC_27797222","title":"Histological Subtype of Ovarian Cancer as a Determinant of Sensitivity to Formamidine Derivatives of Doxorubicin - in Vitro Comparative Studies with SKOV-3 and ES-2 Cancer Cell Lines.","date":"2016","source":"Asian Pacific journal of cancer prevention : APJCP","url":"https://pubmed.ncbi.nlm.nih.gov/27797222","citation_count":4,"is_preprint":false},{"pmid":"18051356","id":"PMC_18051356","title":"Molecular cloning and functional expression of esf gene encoding enantioselective lipase from Serratia marcescens ES-2 for kinetic resolution of optically active (S)-flurbiprofen.","date":"2007","source":"Journal of microbiology and biotechnology","url":"https://pubmed.ncbi.nlm.nih.gov/18051356","citation_count":4,"is_preprint":false},{"pmid":"37024829","id":"PMC_37024829","title":"Whole-exome mutational landscape and molecular marker study in mucinous and clear cell ovarian cancer cell lines 3AO and ES2.","date":"2023","source":"BMC cancer","url":"https://pubmed.ncbi.nlm.nih.gov/37024829","citation_count":3,"is_preprint":false},{"pmid":"40854293","id":"PMC_40854293","title":"Integrated transcriptomic and enzymatic characterization of the molecular insights into nicosulfuron biodegradation by Enterobacter ludwigii ES2.","date":"2025","source":"Journal of hazardous materials","url":"https://pubmed.ncbi.nlm.nih.gov/40854293","citation_count":3,"is_preprint":false},{"pmid":"40412964","id":"PMC_40412964","title":"Efficient selenite reduction and chromium resistance by multiple pathways in Bacillus wiedmannii ES2-45 and Se-biofortification in rice by foliar application.","date":"2024","source":"Journal of environmental sciences (China)","url":"https://pubmed.ncbi.nlm.nih.gov/40412964","citation_count":3,"is_preprint":false},{"pmid":"24767644","id":"PMC_24767644","title":"Effect of gonadotropin-releasing hormone agonist on ES-2 ovarian cancer cells.","date":"2014","source":"Taiwanese journal of obstetrics & gynecology","url":"https://pubmed.ncbi.nlm.nih.gov/24767644","citation_count":3,"is_preprint":false},{"pmid":"26171030","id":"PMC_26171030","title":"Significance of gastrin-releasing peptide in ovarian cancer ES2 cells.","date":"2015","source":"Oncology letters","url":"https://pubmed.ncbi.nlm.nih.gov/26171030","citation_count":3,"is_preprint":false},{"pmid":"39162197","id":"PMC_39162197","title":"Methotrexate-Loaded Chitosan Oligosaccharide-ES2 for Targeted Cancer Therapy.","date":"2024","source":"ACS applied materials & interfaces","url":"https://pubmed.ncbi.nlm.nih.gov/39162197","citation_count":2,"is_preprint":false},{"pmid":"40278372","id":"PMC_40278372","title":"Cell-Free DNA (cfDNA) Regulates Metabolic Remodeling in the ES-2 Ovarian Carcinoma Cell Line, Influencing Cell Proliferation, Quiescence, and Chemoresistance in a Cell-of-Origin-Specific Manner.","date":"2025","source":"Metabolites","url":"https://pubmed.ncbi.nlm.nih.gov/40278372","citation_count":2,"is_preprint":false},{"pmid":"40362295","id":"PMC_40362295","title":"The Role of ESS2/DGCR14: Is It an Essential Factor in Splicing and Transcription?","date":"2025","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/40362295","citation_count":1,"is_preprint":false},{"pmid":"35441357","id":"PMC_35441357","title":"Establishment and characterization of a novel patient-derived Ewing sarcoma cell line, NCC-ES2-C1.","date":"2022","source":"Human cell","url":"https://pubmed.ncbi.nlm.nih.gov/35441357","citation_count":1,"is_preprint":false},{"pmid":"41264495","id":"PMC_41264495","title":"Enhanced Enterobacter ludwigii ES2-Mediated Thifensulfuron-Methyl Degradation and Maize Disease Resistance: A Multifunctional Microbial Technology Approach.","date":"2025","source":"Journal of agricultural and food chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/41264495","citation_count":1,"is_preprint":false},{"pmid":"40953774","id":"PMC_40953774","title":"Therapeutic effects of G90'-ES2 protein complex from regenerated Eisenia fetida on radiation-induced skin injury.","date":"2025","source":"Journal of ethnopharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/40953774","citation_count":0,"is_preprint":false},{"pmid":"17181966","id":"PMC_17181966","title":"[Effects of estrogen receptor beta on proliferation of ovarian clear cell adenocarcinoma ES-2 in vitro and in vivo].","date":"2006","source":"Zhonghua fu chan ke za zhi","url":"https://pubmed.ncbi.nlm.nih.gov/17181966","citation_count":0,"is_preprint":false},{"pmid":null,"id":"bio_10.1101_2025.10.03.677141","title":"<sup>1</sup>  H  <i>R</i>  <sub>1ρ</sub>  Relaxation Identifies a Hidden Intermediate in DNA Base-Pairing","date":"2025-10-04","source":"bioRxiv","url":"https://doi.org/10.1101/2025.10.03.677141","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":29395,"output_tokens":2809,"usd":0.06516,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":9583,"output_tokens":2562,"usd":0.055982,"stage2_stop_reason":"end_turn"},"total_usd":0.121142,"stage1_batch_id":"msgbatch_01AsR7g8dGTEiEw9U83bJeWn","stage2_batch_id":"msgbatch_01YV5ZyxtFNUZEjxRcpd9jzb","note":"batch pricing = 50% of standard"},"stage1_raw":"Looking through the papers, I need to identify those relevant to the human ESS2/DGCR14/DGSI gene (a nuclear protein involved in splicing and transcription, located in the 22q11.2 DiGeorge syndrome region).\n\nRelevant papers:\n- [4] PMID:9063747 - DGSI gene characterization\n- [8] PMID:11751918 - Fission yeast homolog Bis1 (ortholog study)\n- [15] PMID:9499415 - ES2 nuclear protein, coiled-coil domain, mouse expression\n- [19] PMID:25194163 - C. elegans ESS-2 role in mRNA splicing\n- [26] PMID:29454968 - Ess2 bridges transcriptional regulators and spliceosomal complexes\n- [29] PMID:35933014 - Ess2 controls CD4+ T cell survival via Myc and IL-7 pathways\n- [42] PMID:37524814 - ESS2 controls prostate cancer via CHD1 recruitment\n- [52] PMID:40362295 - Review of ESS2/DGCR14 functions\n\nPapers to exclude:\n- Papers about ES-2 ovarian cancer cell line (different entity)\n- Papers about bacterial/microbial ES2 strains\n- Papers about endostatin-derived ES2 peptide (IVRRADRAAVP)\n- Papers about mouse esterase Es-2\n- Paper [57] about DNA base-pairing ES2 intermediate (different entity)\n- Paper [34] about carboxypeptidase ES2 intermediate\n\n```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1997,\n      \"finding\": \"DGSI (ESS2) encodes a conserved 476-amino acid nuclear protein within the minimal DiGeorge syndrome critical region (MDGCR) on chromosome 22q11.2. The gene spans 11 kb of genomic DNA with 10 exons and 9 introns, and its mouse ortholog (Dgsi) maps to proximal chromosome 16 with 93.2% protein identity. Eight sequence variants were identified in DGS/VCFS patients without detectable 22q11.2 deletions, though most were also found in normal controls.\",\n      \"method\": \"Genomic sequencing, cDNA cloning, exon-intron boundary analysis, mutation analysis in patients\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct genomic/cDNA characterization with structural analysis; single lab but multiple orthogonal methods (sequencing, comparative genomics, patient mutation screening)\",\n      \"pmids\": [\"9063747\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"The mouse Es2-encoded protein contains a predicted coiled-coil domain and localizes to the nucleus, as demonstrated by transfection of an Es2-GFP fusion construct. The gene produces two transcript forms via alternative polyadenylation and is highly expressed during mouse embryogenesis from E7 onwards, with highest expression in the nervous system including a sub-region of the pons.\",\n      \"method\": \"GFP fusion protein transfection with fluorescence microscopy for nuclear localization; in situ hybridization for expression pattern; structural analysis programs for coiled-coil prediction\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct nuclear localization by GFP fusion transfection plus developmental expression by in situ hybridization; single lab, two orthogonal methods\",\n      \"pmids\": [\"9499415\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2001,\n      \"finding\": \"The fission yeast ESS2 ortholog Bis1 physically interacts with Ish1, a nuclear envelope protein whose expression is regulated by the Spc1 MAPK pathway through Atf1. Both bis1-null and ish1-null cells exhibit reduced viability in stationary phase. Overexpression of Bis1 causes a cell elongation phenotype.\",\n      \"method\": \"GFP random insertional mutagenesis screen, protein interaction assay, genetic analysis of null mutants in stationary phase survival\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — protein interaction identified in yeast ortholog study with functional validation via null mutant phenotype; single lab, two orthogonal methods (interaction assay + genetic phenotype)\",\n      \"pmids\": [\"11751918\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"C. elegans ESS-2 (homolog of human ES2/DGCR14) promotes accurate mRNA splicing when a splice site is compromised. Loss of function in ess-2 suppresses the rpm-1 locomotor defect only when a dlk-1 splice acceptor mutation is present, demonstrating that ESS-2 acts to rescue aberrant splicing at compromised splice sites in a context-specific manner.\",\n      \"method\": \"Suppressor genetic screen in C. elegans, double-mutant epistasis analysis, ultrastructural synapse analysis\",\n      \"journal\": \"Genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis with defined molecular context (splice acceptor mutation); single lab but multiple orthogonal methods (genetic screen, epistasis, ultrastructure)\",\n      \"pmids\": [\"25194163\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"Mouse Ess2 (Dgcr14) bridges transcriptional regulators and spliceosomal complexes via distinct domains: the N-terminal domain (amino acids 1–200) associates with the transcription factor RORγ/γt but not snRNAs, while the C-terminal region (amino acids 200–476) is required for association with U6, U1, and U4 snRNAs of the spliceosome. Ess2 knockdown abrogated the interaction between spliceosomes and RORs, and an Ess2-dependent association was found between the lncRNA Rmrp and RORs.\",\n      \"method\": \"RNA immunoprecipitation (RIP) assays with Ess2 deletion mutants, Ess2 knockdown in T cell hybridoma, domain mapping experiments\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — domain-mapping RIP with deletion mutants plus knockdown functional validation; single lab, two orthogonal methods\",\n      \"pmids\": [\"29454968\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Conditional knockout of Ess2 specifically in CD4+ T cells (Ess2ΔCD4/ΔCD4 mice) results in reduced naïve T-cell numbers in the spleen without affecting thymocyte numbers, decreased NKT cells, and increased γδT cells. Ess2 enhances the transcriptional activity of c-Myc, and Ess2-deficient naïve CD4+ T cells fail to maintain survival in response to IL-7, placing Ess2 in the Myc and IL-7 signaling pathways controlling post-thymic T-cell survival.\",\n      \"method\": \"Conditional Ess2 knockout using Cre/loxP system, RNA-seq genome-wide expression analysis, flow cytometry, transcriptional activity assays\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional KO mouse model with defined cellular phenotypes, RNA-seq, and functional c-Myc transcriptional assay; multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"35933014\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"ESS2 acts as a transcriptional coregulator in prostate cancer cells by recruiting chromodomain helicase DNA binding protein 1 (CHD1). ESS2 knockdown reduced NF-κB/CHD1 recruitment and histone H3K36me3 levels on promoters of target genes (TNF and CCL2). ESS2 also enhanced transcriptional activities of NF-κB, NFAT, and SMAD2/3. Tamoxifen-inducible Ess2 knockout mice showed delayed prostate development with hypoplasia.\",\n      \"method\": \"ESS2 knockdown in PC3 cells with xenograft tumor assay, microarray analysis, ChIP assay (NF-κB/CHD1 recruitment and H3K36me3), transcriptional activity reporter assays, tamoxifen-inducible conditional KO mice\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods in single study: xenograft KD, microarray, ChIP for histone marks and co-factor recruitment, transcriptional reporter assays, and in vivo conditional KO\",\n      \"pmids\": [\"37524814\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"Review synthesis: ESS2 is a component of the spliceosomal C and C* complexes (containing U2, U5, U6 snRNAs) and also interacts with U1 snRNP. ESS2 has a conserved coiled-coil 'Es domain' from yeast to humans and regulates mRNA splicing and transcriptional activity through interactions with transcription factors; ESS2-dependent gene expression regulation is cell type-selective. ESS2 knockout mice are embryonic lethal at an early stage.\",\n      \"method\": \"Review of published experimental findings\",\n      \"journal\": \"International journal of molecular sciences\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 4 / Weak — review paper synthesizing prior findings; no new primary experiments reported\",\n      \"pmids\": [\"40362295\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ESS2 (DGCR14) is a conserved nuclear protein with a coiled-coil domain that functions as a dual-activity factor bridging spliceosomal complexes (via its C-terminal domain, which associates with U1, U4, and U6 snRNAs as part of the C/C* spliceosome) and transcriptional regulators (via its N-terminal domain, which interacts with RORγ/γt, c-Myc, NF-κB, NFAT, and SMAD2/3), thereby coupling pre-mRNA splicing to transcription in a cell-type-selective manner; in T cells it is required for post-thymic naïve CD4+ T-cell survival through the Myc and IL-7 pathways, and in prostate epithelium it controls development and cancer progression through CHD1 recruitment and H3K36me3 deposition at target gene promoters.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ESS2 (DGCR14) is a conserved nuclear coiled-coil protein, encoded within the minimal DiGeorge syndrome critical region on chromosome 22q11.2, that couples pre-mRNA splicing to transcription [#0, #1, #4]. It functions as a bridging factor through two functionally distinct domains: an N-terminal region (amino acids 1–200) that associates with transcription factors such as RORγ/γt, and a C-terminal region (amino acids 200–476) required for association with U6, U1, and U4 snRNAs of the spliceosome; knockdown of Ess2 abrogates the interaction between spliceosomes and RORs and disrupts an Ess2-dependent association between the lncRNA Rmrp and RORs [#4]. This dual activity is deployed in a cell-type-selective manner. In CD4+ T cells, Ess2 enhances c-Myc transcriptional activity and is required for IL-7-dependent survival of post-thymic naïve T cells, with its conditional loss reducing naïve and NKT cell numbers and elevating γδ T cells [#5]. In prostate epithelium, ESS2 acts as a transcriptional coregulator by recruiting CHD1 and enhancing NF-κB, NFAT, and SMAD2/3 activity, driving NF-κB/CHD1 recruitment and H3K36me3 deposition at target promoters including TNF and CCL2, and its loss delays prostate development and limits cancer progression [#6]. Functional conservation extends across species, where orthologs support accurate splicing at compromised splice sites and nuclear-envelope-associated stationary-phase survival [#2, #3].\",\n  \"teleology\": [\n    {\n      \"year\": 1997,\n      \"claim\": \"Establishing that ESS2 maps to the DiGeorge critical region defined the gene as a candidate contributor to a developmental syndrome and provided its structural foundation.\",\n      \"evidence\": \"Genomic sequencing, cDNA cloning, and patient mutation screening of the 22q11.2 region\",\n      \"pmids\": [\"9063747\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Patient variants were largely found in controls, leaving no causative mutation established\", \"No protein function assigned\"]\n    },\n    {\n      \"year\": 1998,\n      \"claim\": \"Defining subcellular localization and domain architecture established ESS2 as a nuclear coiled-coil protein with developmental expression, narrowing its likely sphere of action.\",\n      \"evidence\": \"GFP-fusion transfection microscopy and in situ hybridization in mouse\",\n      \"pmids\": [\"9499415\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No molecular partners identified\", \"Functional role of the coiled-coil domain unknown\"]\n    },\n    {\n      \"year\": 2001,\n      \"claim\": \"Identification of a physical partner in the fission yeast ortholog linked ESS2 to the nuclear envelope and stationary-phase viability, the first interaction-based functional clue.\",\n      \"evidence\": \"GFP insertional mutagenesis screen, interaction assay, and null-mutant phenotyping in S. pombe\",\n      \"pmids\": [\"11751918\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism connecting Bis1 to splicing/transcription not addressed\", \"Human ortholog interaction not tested\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Genetic epistasis in C. elegans first tied ESS2 directly to mRNA splicing, showing it rescues aberrant splicing at compromised splice sites.\",\n      \"evidence\": \"Suppressor genetic screen and double-mutant epistasis with a dlk-1 splice acceptor mutation\",\n      \"pmids\": [\"25194163\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Biochemical mechanism of splice-site rescue not defined\", \"No spliceosomal component interaction shown\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Domain-mapping showed how ESS2 physically bridges spliceosomal snRNAs and transcription factors, defining its dual-activity molecular architecture.\",\n      \"evidence\": \"RNA immunoprecipitation with deletion mutants and knockdown in a T cell hybridoma\",\n      \"pmids\": [\"29454968\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs. indirect RNA contacts not resolved\", \"Stoichiometry within the spliceosome unknown\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"A conditional knockout placed Ess2 in a defined physiological pathway, showing it sustains post-thymic naïve CD4+ T-cell survival via c-Myc and IL-7.\",\n      \"evidence\": \"CD4-specific Cre/loxP knockout, RNA-seq, flow cytometry, and c-Myc transcriptional assays in mouse\",\n      \"pmids\": [\"35933014\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether splicing activity underlies the T-cell phenotype not separated from transcriptional role\", \"Direct c-Myc binding mechanism unresolved\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Demonstrating CHD1 recruitment and H3K36me3 deposition established a concrete chromatin-level mechanism for ESS2 transcriptional coregulation in prostate development and cancer.\",\n      \"evidence\": \"PC3 knockdown with xenografts, microarray, ChIP for CHD1/NF-κB and H3K36me3, reporter assays, and tamoxifen-inducible KO mice\",\n      \"pmids\": [\"37524814\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether ESS2 directly binds CHD1 or acts via intermediates not resolved\", \"Link between this transcriptional role and the spliceosomal association not mechanistically connected\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How ESS2 selects target genes in a cell-type-specific manner and mechanistically integrates its splicing and transcriptional activities remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural model of ESS2 within the C/C* spliceosome\", \"Determinants of cell-type-selective gene targeting unknown\", \"Embryonic lethality of full knockout precludes whole-animal loss-of-function analysis\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [5, 6]},\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [4]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 1]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [4]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [6]}\n    ],\n    \"complexes\": [\"spliceosomal C/C* complex\"],\n    \"partners\": [\"RORC\", \"CHD1\", \"MYC\", \"NFKB1\", \"NFATC1\", \"SMAD2\", \"SMAD3\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"faith_supported":5,"faith_total":5,"faith_pct":100.0}}