{"gene":"TCF19","run_date":"2026-06-10T10:51:54","timeline":{"discoveries":[{"year":1995,"finding":"TCF19 (SC1) was mapped to an ~0.2-Mb region on chromosome 6p21.3 between HLA-C and the S genes, approximately 130 kb telomeric of HLA-C and ~0.6 kb from POU5F1. Complete sequencing of a 5.5-kb EcoRI fragment revealed that TCF19 is composed of three exons bounded by consensus splice signals.","method":"Transposon gamma-delta-based nested deletion sequencing and subcloning of genomic DNA fragments","journal":"Genomics","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — direct sequencing and genomic mapping in a single study; establishes gene structure but no functional mechanism","pmids":["8595903"],"is_preprint":false},{"year":2013,"finding":"siRNA-mediated knockdown of Tcf19 in INS-1 β-cells caused decreased cell proliferation and increased apoptosis. Knockdown led to G1/S checkpoint arrest with reduced expression of cell cycle genes from late G1 through M phase, and increased ER stress susceptibility with reduced expression of ER homeostasis genes (Bip, p58(IPK), Edem1, calreticulin) and increased proapoptotic genes (Bim, Bid, Nix, Gadd34, Pdia2).","method":"siRNA knockdown in INS-1 β-cell line; BrdU proliferation assay; flow cytometry; qPCR for cell cycle and apoptosis gene expression","journal":"American journal of physiology. Endocrinology and metabolism","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — clean KD with defined cellular phenotype and multiple orthogonal readouts (proliferation, apoptosis, gene expression), single lab","pmids":["23860123"],"is_preprint":false},{"year":2019,"finding":"TCF19 promotes cell proliferation in hepatocellular carcinoma (HepG2) cells through its PHD finger domain, which directly binds trimethylated lysine 4 of histone H3 (H3K4me3). Tryptophan 316 (W316) of the PHD finger is a critical residue for this interaction. Genome-wide microarray identified a large subset of cell survival and proliferation genes dependent on TCF19.","method":"PHD finger binding assay for H3K4me3; site-directed mutagenesis (W316 mutation); whole genome microarray; cell proliferation assays in HepG2 cells","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct biochemical binding assay for H3K4me3, mutagenesis validating critical residue, and genome-wide functional readout in single study","pmids":["31746185"],"is_preprint":false},{"year":2018,"finding":"TCF19 overexpression in HCC cell lines enhances proliferation and G1/S cell cycle transition by inhibiting p57Kip2, p21Cip1, and p27Kip1 and upregulating cyclin D1 via AKT/FOXO1 signaling; AKT and FOXO1 inhibitors suppressed TCF19-driven proliferation.","method":"TCF19 overexpression in HCC cell lines; MTT and colony formation assays; flow cytometry; Western blot for cell cycle regulators; AKT and FOXO1 pharmacological inhibition","journal":"Neoplasma","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — overexpression with phenotypic readouts and pathway inhibitor rescue, single lab, multiple methods","pmids":["30509085"],"is_preprint":false},{"year":2019,"finding":"TCF19 promotes G1/S cell cycle transition in non-small cell lung cancer (NSCLC) cells by inhibiting FOXO1, which reduces expression of p21, p27, and p57 while increasing cyclin D1. Chromatin immunoprecipitation (ChIP) assay confirmed TCF19 occupancy at the FOXO1-regulated target gene loci.","method":"TCF19 overexpression and knockdown in LAC and SCC cell lines; MTT, colony formation, anchorage-independent growth assays; flow cytometry; ChIP assay; qPCR","journal":"Cell biology international","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP assay confirming direct chromatin occupancy, multiple cell-based assays, single lab","pmids":["31141247"],"is_preprint":false},{"year":2021,"finding":"TCF19 interacts with p53 and co-regulates metabolic genes TIGAR and SCO2 in hepatocellular carcinoma. IP/MS studies showed that TCF19/p53 complexes contain either CBP (for transcriptional activation under short-term high glucose) or HDAC1 (for repression under prolonged high glucose), epigenetically programming TIGAR and SCO2 expression. TCF19 or p53 knockdown altered cellular lactate production, extracellular acidification rate, oxygen consumption rate, ATP production, and mitochondrial membrane potential.","method":"Co-immunoprecipitation and mass spectrometry (IP/MS); ChIP; luciferase reporter; siRNA knockdown; metabolic assays (OCR, ECAR, ATP, lactate); RNA-seq","journal":"FASEB journal","confidence":"High","confidence_rationale":"Tier 1 / Moderate — IP/MS identifying TCF19/p53/CBP and TCF19/p53/HDAC1 complexes with ChIP validation and multiple functional metabolic readouts, single lab with orthogonal methods","pmids":["34369624"],"is_preprint":false},{"year":2021,"finding":"TCF19 overexpression in INS-1 β-cells and human islets increased nucleotide incorporation without changes in cell cycle gene expression, and induced expression of DNA damage response (DDR) genes and genes involved in viral responses, immune system processes, and inflammation, revealing a role for TCF19 in regulating DDR and inflammatory gene networks in β-cells.","method":"TCF19 overexpression in INS-1 cells and human islets; RNA-seq; nucleotide incorporation assay; gene expression analysis","journal":"Metabolites","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — RNA-seq with overexpression in a single lab; mechanistic pathway placement is incomplete","pmids":["34436454"],"is_preprint":false},{"year":2020,"finding":"TCF19 negatively regulates WWC1 expression in colorectal cancer cells. Silencing TCF19 attenuated proliferation and migration of HT29 cells; knockdown of WWC1 abolished the regulatory effects of TCF19, establishing a TCF19→WWC1 negative regulatory axis in CRC progression.","method":"siRNA knockdown of TCF19 and WWC1; overexpression of TCF19 in HCT-8 cells; cell viability, colony formation, migration assays; rescue experiments; qRT-PCR","journal":"European review for medical and pharmacological sciences","confidence":"Low","confidence_rationale":"Tier 3 / Weak — epistasis by knockdown/rescue, single lab, no direct binding or ChIP data for TCF19 at WWC1 locus","pmids":["32016966"],"is_preprint":false},{"year":2023,"finding":"TCF19 promotes TRIM14 transcription in MSI endometrial cancer, activating the TBK1-IRF3-IFN-β pathway and enhanced IFN-β secretion, which facilitates CD8+ T cell exhaustion through cell differentiation reprogramming. TCF19 inhibition combined with anti-PD-1 therapy showed synergistic anti-tumor responses in humanized mouse models.","method":"TCF19 knockdown/overexpression; ChIP for TCF19 at TRIM14 promoter; cytokine measurement; T cell exhaustion marker analysis; humanized mouse tumor models; TCGA correlation analysis","journal":"Cell reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP validation of TCF19 binding to TRIM14 promoter, in vivo humanized models, multiple orthogonal methods, single lab","pmids":["37566545"],"is_preprint":false},{"year":2024,"finding":"TCF19 promotes lung cancer cell growth and primary tumor development via the RAF/MEK/ERK signaling pathway. TCF19 overexpression increased phosphorylation of Raf1, MEK1/2, and ERK1/2; inhibiting RAF1 (shRaf1) or ERK reduced cell cycle proteins and inhibited growth of TCF19-overexpressing cells.","method":"TCF19 overexpression in A549 and Hop62 cells; transgenic mouse models; transcriptome sequencing; western blot for pathway phosphorylation; shRaf1 knockdown; ERK inhibitor treatment; functional growth assays","journal":"Translational oncology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pathway placement by epistasis (shRaf1/ERK inhibitor rescue of TCF19 overexpression phenotype), in vivo transgenic model, transcriptome, single lab","pmids":["38701650"],"is_preprint":false},{"year":2024,"finding":"TCF19 is enriched on the CDKN2A promoter and activates CDKN2A transcription in osteosarcoma. Upregulation of CDKN2A by TCF19 promotes glycolysis and M2 macrophage polarization; TCF19 knockdown inhibited OS tumor growth, metabolic reprogramming, and CDKN2A expression in xenograft mice.","method":"ChIP-qPCR validating TCF19 binding to CDKN2A promoter; siRNA knockdown and pcDNA3.4 overexpression of CDKN2A; metabolic assays (ECAR, OCR); macrophage co-culture (CD206/CD86, IL-10/IL-12 measurement); xenograft OS mouse model","journal":"FASEB journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP-qPCR confirming direct TCF19 binding to CDKN2A promoter, in vivo xenograft, metabolic and immune functional readouts, single lab","pmids":["40193126"],"is_preprint":false},{"year":2024,"finding":"TCF19 promotes breast cancer EMT and metastasis by suppressing miR-199a-5p expression, which leads to altered SP1 nuclear dynamics and increased SP1 binding to the LOXL2 promoter, upregulating LOXL2 and driving migration, invasion, and EMT. TCF19 knockdown reduced xenograft tumor growth and metastatic establishment.","method":"TCF19 knockdown in BC cell lines; in vitro migration/invasion/EMT assays; miR-199a-5p overexpression; SP1 ChIP at LOXL2 promoter; subcutaneous and tail-vein xenograft models","journal":"Cancer letters","confidence":"Low","confidence_rationale":"Tier 3 / Weak — ChIP data for SP1 (not TCF19 directly), indirect TCF19→miR-199a-5p→SP1→LOXL2 axis, single lab","pmids":["38851313"],"is_preprint":false},{"year":2021,"finding":"A genetic variant (rs3094187), in high LD with the SCCHN-associated SNP rs3131018, was shown to modify TCF19 expression by regulating the binding affinity of transcription factor SREBF1 to the TCF19 promoter, establishing SREBF1 as a transcriptional regulator of TCF19.","method":"Luciferase reporter assay; electrophoretic mobility shift assay (EMSA); ChIP for SREBF1 at TCF19 promoter; allele-specific binding assay","journal":"Journal of medical genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — EMSA and reporter assay demonstrating allele-specific SREBF1 binding to TCF19 promoter, single lab, two orthogonal methods","pmids":["34085947"],"is_preprint":false},{"year":2025,"finding":"TCF19 binds to the DHX32 promoter and activates DHX32 transcription in glioma cells, and the TCF19-DHX32 axis activates β-catenin signaling to promote glioma cell proliferation and cell cycle progression while suppressing apoptosis. Overexpression of DHX32 rescued the anti-proliferative effects of TCF19 knockdown.","method":"ChIP-qRT-PCR and luciferase reporter assay for TCF19 binding at DHX32 promoter; TCF19 knockdown and DHX32 overexpression rescue experiments; MTT, FACS, xenograft assays; Western blot for β-catenin pathway","journal":"Current cancer drug targets","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP and reporter assay confirming direct TCF19 binding to DHX32 promoter, epistatic rescue experiment, single lab","pmids":["39838676"],"is_preprint":false}],"current_model":"TCF19 is a nuclear transcription factor containing a PHD finger (which reads H3K4me3 chromatin marks) and an FHA domain; it directly binds gene promoters to regulate cell cycle progression, proliferation, and survival—notably by modulating cyclin D1/CDK inhibitor expression via AKT/FOXO1 signaling, activating metabolic genes (TIGAR, SCO2) in complex with p53 and either CBP or HDAC1 depending on glucose conditions, promoting transcription of TRIM14 (activating TBK1-IRF3-IFN-β), CDKN2A, and DHX32 (activating β-catenin), and is itself transcriptionally regulated by SREBF1; loss-of-function in pancreatic β-cells impairs proliferation and induces ER stress and apoptosis."},"narrative":{"mechanistic_narrative":"TCF19 is a chromatin-associated transcriptional regulator that drives cell cycle progression, proliferation, and survival across multiple cell types [PMID:23860123, PMID:31746185]. It reads activating chromatin marks through a PHD finger that directly binds H3K4me3, an interaction that depends on the critical residue tryptophan 316 and is required for the proliferative program controlled by a broad set of survival and proliferation genes [PMID:31746185]. TCF19 occupies target promoters directly—including FOXO1-regulated loci, the TRIM14, CDKN2A, and DHX32 promoters—and thereby tunes downstream transcriptional outputs: it promotes G1/S transition by suppressing the CDK inhibitors p21, p27, and p57 while upregulating cyclin D1 via AKT/FOXO1 signaling [PMID:30509085, PMID:31141247], activates TRIM14 to engage the TBK1-IRF3-IFN-β axis [PMID:37566545], activates CDKN2A to reprogram glycolysis and macrophage polarization [PMID:40193126], and activates DHX32 to engage β-catenin signaling [PMID:39838676]. TCF19 also forms a complex with p53 that recruits either CBP for activation or HDAC1 for repression to epigenetically program the metabolic genes TIGAR and SCO2 in a glucose-dependent manner, controlling cellular glycolytic and oxidative metabolism [PMID:34369624]. Its own expression is controlled transcriptionally by SREBF1 binding at the TCF19 promoter [PMID:34085947]. In pancreatic β-cells, loss of TCF19 arrests proliferation at the G1/S checkpoint and sensitizes cells to ER stress and apoptosis [PMID:23860123].","teleology":[{"year":1995,"claim":"Before any function was known, the genomic identity and structure of TCF19 had to be defined; mapping it to chromosome 6p21.3 within the MHC class I region and resolving its three-exon structure established it as a discrete gene.","evidence":"Transposon-based nested deletion sequencing and genomic mapping of a 5.5-kb fragment near HLA-C/POU5F1","pmids":["8595903"],"confidence":"Medium","gaps":["No protein function, domain activity, or expression pattern established","No link to chromatin or transcription"]},{"year":2013,"claim":"The first functional test asked what TCF19 does in a physiological cell type; knockdown in β-cells revealed it is required for proliferation, cell cycle progression, and protection from ER stress and apoptosis.","evidence":"siRNA knockdown in INS-1 β-cells with proliferation, flow cytometry, and qPCR readouts","pmids":["23860123"],"confidence":"Medium","gaps":["Mechanism of cell cycle gene regulation not defined","No direct DNA or chromatin binding shown","Limited to a single cell line"]},{"year":2018,"claim":"The molecular route to cell cycle control was placed on a defined signaling axis: TCF19 drives G1/S transition by inhibiting CDK inhibitors and inducing cyclin D1 through AKT/FOXO1.","evidence":"Overexpression in HCC lines with pharmacological AKT/FOXO1 inhibition and Western blot for cell cycle regulators","pmids":["30509085"],"confidence":"Medium","gaps":["Did not demonstrate direct TCF19 promoter binding","Whether AKT/FOXO1 modulation is direct or indirect unresolved"]},{"year":2019,"claim":"Two complementary studies established TCF19 as a direct chromatin reader and DNA-occupying factor: it binds H3K4me3 via its PHD finger (W316-dependent) and occupies FOXO1-regulated target loci.","evidence":"PHD finger H3K4me3 binding assay with W316 mutagenesis and genome-wide microarray in HepG2; ChIP at FOXO1 target loci in NSCLC cells","pmids":["31746185","31141247"],"confidence":"High","gaps":["Genome-wide direct binding sites not mapped by ChIP-seq","How PHD reading connects to specific promoter selection unresolved"]},{"year":2021,"claim":"The work expanded TCF19 into a metabolic regulator and defined a context-dependent transcriptional mechanism: TCF19/p53 complexes recruit CBP or HDAC1 depending on glucose to program TIGAR and SCO2.","evidence":"IP/MS, ChIP, luciferase reporter, and metabolic assays (OCR, ECAR, ATP, lactate) in HCC cells","pmids":["34369624"],"confidence":"High","gaps":["What determines CBP vs HDAC1 selection mechanistically unresolved","Direct vs p53-dependent DNA contact of TCF19 not separated"]},{"year":2021,"claim":"Additional findings positioned TCF19 within DNA-damage/inflammatory gene networks in β-cells and identified SREBF1 as an upstream transcriptional regulator binding the TCF19 promoter.","evidence":"Overexpression plus RNA-seq in INS-1 cells and human islets; luciferase, EMSA, and ChIP for SREBF1 at the TCF19 promoter","pmids":["34436454","34085947"],"confidence":"Medium","gaps":["Direct targets of TCF19 within DDR/inflammatory networks not identified","Functional consequence of SREBF1-driven TCF19 expression not tested phenotypically"]},{"year":2023,"claim":"TCF19 was linked to immune evasion through direct promoter activation: it drives TRIM14 transcription to engage the TBK1-IRF3-IFN-β axis and promote CD8+ T cell exhaustion, with therapeutic synergy alongside anti-PD-1.","evidence":"ChIP at the TRIM14 promoter, cytokine and T cell exhaustion analysis, and humanized mouse tumor models","pmids":["37566545"],"confidence":"Medium","gaps":["Whether IFN-β-driven exhaustion generalizes beyond MSI endometrial cancer unknown","Structural basis of TCF19 promoter recognition not defined"]},{"year":2024,"claim":"Further studies broadened TCF19's direct transcriptional targets and signaling outputs: it activates CDKN2A to reprogram glycolysis and macrophage polarization and engages RAF/MEK/ERK signaling to drive tumor growth.","evidence":"ChIP-qPCR at the CDKN2A promoter with metabolic and macrophage co-culture assays and xenografts; transcriptome and Western blot for RAF/MEK/ERK phosphorylation with shRaf1/ERK inhibitor rescue in lung cancer","pmids":["40193126","38701650"],"confidence":"Medium","gaps":["How CDKN2A activation is reconciled with proliferation promotion unresolved","Whether RAF/MEK/ERK activation is a direct transcriptional consequence not established"]},{"year":2025,"claim":"TCF19 was shown to directly activate DHX32 transcription to engage β-catenin signaling, with DHX32 re-expression rescuing the proliferative defect of TCF19 loss, confirming an epistatic transcriptional axis.","evidence":"ChIP-qRT-PCR and luciferase reporter at the DHX32 promoter with TCF19 knockdown/DHX32 overexpression rescue in glioma cells and xenografts","pmids":["39838676"],"confidence":"Medium","gaps":["Whether DHX32 is a direct or context-specific target across tissues unknown","Mechanism connecting DHX32 to β-catenin not detailed"]},{"year":null,"claim":"A unified picture of how TCF19's PHD-mediated H3K4me3 reading selects among its many reported direct promoter targets, and how it switches between activation and repression complexes, remains unresolved.","evidence":"No genome-wide ChIP-seq integrating chromatin reading with target selection in the available corpus","pmids":[],"confidence":"Low","gaps":["No structural model of the PHD/FHA domains in action","No genome-wide direct binding map","Determinants of coactivator vs corepressor recruitment unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[3,4,5,8,10,13]},{"term_id":"GO:0042393","term_label":"histone binding","supporting_discovery_ids":[2]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[4,8,10,13]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[2,4,5]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[4,5,8,10,13]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[1,3,4]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[2,5]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[3,9,13]}],"complexes":["TCF19/p53/CBP","TCF19/p53/HDAC1"],"partners":["TP53","CBP","HDAC1","FOXO1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9Y242","full_name":"Transcription factor 19","aliases":["Transcription factor SC1"],"length_aa":345,"mass_kda":37.2,"function":"Potential transcription factor that may play a role in the regulation of genes involved in cell cycle G1/S transition (PubMed:1868030, PubMed:31141247). May bind to regulatory elements of genes, including the promoter of the transcription factor FOXO1 (PubMed:31141247)","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/Q9Y242/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/TCF19","classification":"Not Classified","n_dependent_lines":2,"n_total_lines":1208,"dependency_fraction":0.0016556291390728477},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/TCF19","total_profiled":1310},"omim":[{"mim_id":"600912","title":"TRANSCRIPTION FACTOR 19; TCF19","url":"https://www.omim.org/entry/600912"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoplasm","reliability":"Approved"},{"location":"Nucleoli","reliability":"Approved"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in many","driving_tissues":[],"url":"https://www.proteinatlas.org/search/TCF19"},"hgnc":{"alias_symbol":["SC1"],"prev_symbol":[]},"alphafold":{"accession":"Q9Y242","domains":[{"cath_id":"2.60.200.20","chopping":"3-139","consensus_level":"high","plddt":78.447,"start":3,"end":139},{"cath_id":"3.30.40.10","chopping":"292-345","consensus_level":"medium","plddt":78.3991,"start":292,"end":345}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y242","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y242-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9Y242-F1-predicted_aligned_error_v6.png","plddt_mean":62.59},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=TCF19","jax_strain_url":"https://www.jax.org/strain/search?query=TCF19"},"sequence":{"accession":"Q9Y242","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9Y242.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9Y242/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9Y242"}},"corpus_meta":[{"pmid":"16518472","id":"PMC_16518472","title":"Downregulation of the Drosophila immune response by peptidoglycan-recognition proteins SC1 and SC2.","date":"2006","source":"PLoS pathogens","url":"https://pubmed.ncbi.nlm.nih.gov/16518472","citation_count":260,"is_preprint":false},{"pmid":"1931049","id":"PMC_1931049","title":"Molecular cloning and expression of a novel adhesion molecule, SC1.","date":"1991","source":"Neuron","url":"https://pubmed.ncbi.nlm.nih.gov/1931049","citation_count":203,"is_preprint":false},{"pmid":"1690015","id":"PMC_1690015","title":"Molecular cloning of SC1: a putative brain extracellular matrix glycoprotein showing partial similarity to osteonectin/BM40/SPARC.","date":"1990","source":"Neuron","url":"https://pubmed.ncbi.nlm.nih.gov/1690015","citation_count":123,"is_preprint":false},{"pmid":"15345243","id":"PMC_15345243","title":"Axon fasciculation defects and retinal dysplasias in mice lacking the immunoglobulin superfamily adhesion molecule BEN/ALCAM/SC1.","date":"2004","source":"Molecular and cellular neurosciences","url":"https://pubmed.ncbi.nlm.nih.gov/15345243","citation_count":91,"is_preprint":false},{"pmid":"15094114","id":"PMC_15094114","title":"Hevin/SC1, a matricellular glycoprotein and potential tumor-suppressor of the SPARC/BM-40/Osteonectin family.","date":"2004","source":"The international journal of biochemistry & cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/15094114","citation_count":84,"is_preprint":false},{"pmid":"7757257","id":"PMC_7757257","title":"Initial tract formation in the brain of the chick embryo: selective expression of the BEN/SC1/DM-GRASP cell adhesion molecule.","date":"1995","source":"The European journal of neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/7757257","citation_count":84,"is_preprint":false},{"pmid":"12538579","id":"PMC_12538579","title":"SC1/hevin. An extracellular calcium-modulated protein that binds collagen I.","date":"2003","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/12538579","citation_count":77,"is_preprint":false},{"pmid":"26039995","id":"PMC_26039995","title":"Sorafenib and its derivative SC-1 exhibit antifibrotic effects through signal transducer and activator of transcription 3 inhibition.","date":"2015","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/26039995","citation_count":71,"is_preprint":false},{"pmid":"11591693","id":"PMC_11591693","title":"Cloning and characterization of a gene cluster for cyclododecanone oxidation in Rhodococcus ruber SC1.","date":"2001","source":"Journal of bacteriology","url":"https://pubmed.ncbi.nlm.nih.gov/11591693","citation_count":64,"is_preprint":false},{"pmid":"15150282","id":"PMC_15150282","title":"Expression and characterization of murine hevin (SC1), a member of the SPARC family of matricellular proteins.","date":"2004","source":"The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society","url":"https://pubmed.ncbi.nlm.nih.gov/15150282","citation_count":56,"is_preprint":false},{"pmid":"2706635","id":"PMC_2706635","title":"SC-1, a functional human monoclonal antibody against autologous stomach carcinoma cells.","date":"1989","source":"Cancer research","url":"https://pubmed.ncbi.nlm.nih.gov/2706635","citation_count":56,"is_preprint":false},{"pmid":"9199668","id":"PMC_9199668","title":"Cloning and expression of murine SC1, a gene product homologous to SPARC.","date":"1997","source":"The journal of histochemistry and cytochemistry : official journal of the Histochemistry Society","url":"https://pubmed.ncbi.nlm.nih.gov/9199668","citation_count":55,"is_preprint":false},{"pmid":"15051733","id":"PMC_15051733","title":"The p75NTR-interacting protein SC1 inhibits cell cycle progression by transcriptional repression of cyclin E.","date":"2004","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/15051733","citation_count":53,"is_preprint":false},{"pmid":"9245496","id":"PMC_9245496","title":"Axon-regenerating retinal ganglion cells in adult rats synthesize the cell adhesion molecule L1 but not TAG-1 or SC-1.","date":"1997","source":"Molecular and cellular neurosciences","url":"https://pubmed.ncbi.nlm.nih.gov/9245496","citation_count":53,"is_preprint":false},{"pmid":"8869553","id":"PMC_8869553","title":"SC1: a marker for astrocytes in the adult rodent brain is upregulated during reactive astrocytosis.","date":"1996","source":"Brain research","url":"https://pubmed.ncbi.nlm.nih.gov/8869553","citation_count":52,"is_preprint":false},{"pmid":"8883893","id":"PMC_8883893","title":"SC1, a brain extracellular matrix glycoprotein related to SPARC and follistatin, is expressed by rat cerebellar astrocytes following injury and during development.","date":"1996","source":"Brain research","url":"https://pubmed.ncbi.nlm.nih.gov/8883893","citation_count":45,"is_preprint":false},{"pmid":"7958430","id":"PMC_7958430","title":"Cell adhesion molecule SC1/DMGRASP is expressed on growing axons of retina ganglion cells and is involved in mediating their extension on axons.","date":"1994","source":"Developmental biology","url":"https://pubmed.ncbi.nlm.nih.gov/7958430","citation_count":45,"is_preprint":false},{"pmid":"7815068","id":"PMC_7815068","title":"Regulation of SC1/DM-GRASP during the migration of motor neurons in the chick embryo brain stem.","date":"1994","source":"Journal of neurobiology","url":"https://pubmed.ncbi.nlm.nih.gov/7815068","citation_count":45,"is_preprint":false},{"pmid":"21937915","id":"PMC_21937915","title":"SC1/hevin and reactive gliosis after transient ischemic stroke in young and aged rats.","date":"2011","source":"Journal of neuropathology and experimental neurology","url":"https://pubmed.ncbi.nlm.nih.gov/21937915","citation_count":44,"is_preprint":false},{"pmid":"28938620","id":"PMC_28938620","title":"Pathological expression of tissue factor confers promising antitumor response to a novel therapeutic antibody SC1 in triple negative breast cancer and pancreatic adenocarcinoma.","date":"2017","source":"Oncotarget","url":"https://pubmed.ncbi.nlm.nih.gov/28938620","citation_count":43,"is_preprint":false},{"pmid":"18375004","id":"PMC_18375004","title":"Real-time PCR for detection and quantification of the biocontrol agent Trichoderma atroviride strain SC1 in soil.","date":"2008","source":"Journal of microbiological methods","url":"https://pubmed.ncbi.nlm.nih.gov/18375004","citation_count":43,"is_preprint":false},{"pmid":"23860123","id":"PMC_23860123","title":"Tcf19 is a novel islet factor necessary for proliferation and survival in the INS-1 β-cell line.","date":"2013","source":"American journal of physiology. 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targets","url":"https://pubmed.ncbi.nlm.nih.gov/39838676","citation_count":2,"is_preprint":false},{"pmid":"38579171","id":"PMC_38579171","title":"Multidimensional data analysis revealed thyroiditis-associated TCF19 SNP rs2073724 as a highly ranked protective variant in thyroid cancer.","date":"2024","source":"Aging","url":"https://pubmed.ncbi.nlm.nih.gov/38579171","citation_count":2,"is_preprint":false},{"pmid":"18456703","id":"PMC_18456703","title":"Expression of paralogs of cytochrome P 450 21a1 pseudogene (Cyp21a1-ps) and endogenous retrovirus SC1 (SC1) in the rat ovary during the ovulatory process.","date":"2008","source":"The Journal of endocrinology","url":"https://pubmed.ncbi.nlm.nih.gov/18456703","citation_count":2,"is_preprint":false},{"pmid":"34481979","id":"PMC_34481979","title":"SC1 limits tube formation, branching, migration, expansion and induce apoptosis of endothelial cells.","date":"2021","source":"Vascular pharmacology","url":"https://pubmed.ncbi.nlm.nih.gov/34481979","citation_count":2,"is_preprint":false},{"pmid":"12799069","id":"PMC_12799069","title":"BEN/DM-GRASP/SC1 expression during mouse facial development: differential expression and regulation in molars and incisors.","date":"2003","source":"Gene expression patterns : GEP","url":"https://pubmed.ncbi.nlm.nih.gov/12799069","citation_count":2,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":44064,"output_tokens":4534,"usd":0.100101,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":11751,"output_tokens":3580,"usd":0.074127,"stage2_stop_reason":"end_turn"},"total_usd":0.174228,"stage1_batch_id":"msgbatch_017qqVz33Ga63SCDwzb35XPb","stage2_batch_id":"msgbatch_01Scr2Ei9x4HJMiRGxwrmvLK","note":"batch pricing = 50% of standard"},"stage1_raw":"Looking through the abstracts, I need to identify papers about the canonical human/mammalian TCF19 gene (also known as SC1 in the context of the HLA class I region transcription factor, not other SC1 genes). \n\nKey disambiguation:\n- TCF19/SC1 (HGNC) = transcription factor 19, located in MHC class I region on chromosome 6p21.3 — this is the target gene\n- Many papers describe other \"SC1\" genes: SPARC-like/hevin (extracellular matrix protein), BEN/ALCAM/DM-GRASP (Ig superfamily adhesion molecule), PGRP-SC1 (Drosophila immune), SC1/PRDM4 (Schwann cell factor), small molecule SC1 (pluripotin/ERK inhibitor), SC-1 antibody, bacterial SC1 strains, etc.\n\nPapers clearly about TCF19 (transcription factor 19, MHC region, chromosome 6p21.3):\n- PMID 23860123 (Krautkramer 2013) ✓\n- PMID 31746185 (Mondal 2019) ✓\n- PMID 34369624 (Mondal 2021) ✓\n- PMID 31141247 (Zhou 2019) ✓\n- PMID 30509085 (Zeng 2018) ✓\n- PMID 37566545 (Ma 2023) ✓\n- PMID 34436454 (Yang 2021) ✓\n- PMID 38701650 (Tian 2024) ✓\n- PMID 32016966 (Du 2020) ✓\n- PMID 40193126 (Hu 2025) ✓\n- PMID 38851313 (Li 2024) ✓\n- PMID 39838676 (Tan 2025) ✓\n- PMID 8595903 (Krishnan 1995) ✓ (genomic mapping)\n- PMID 10777095 (Teraoka 2000) ✓\n- PMID 21076979 (Cheung 2010) — GWAS, no mechanism\n- PMID 34085947 (Ji 2021) ✓ (functional assay showing SREBF1 binding to TCF19 promoter)\n\n```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 1995,\n      \"finding\": \"TCF19 (SC1) was mapped to an ~0.2-Mb region on chromosome 6p21.3 between HLA-C and the S genes, approximately 130 kb telomeric of HLA-C and ~0.6 kb from POU5F1. Complete sequencing of a 5.5-kb EcoRI fragment revealed that TCF19 is composed of three exons bounded by consensus splice signals.\",\n      \"method\": \"Transposon gamma-delta-based nested deletion sequencing and subcloning of genomic DNA fragments\",\n      \"journal\": \"Genomics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — direct sequencing and genomic mapping in a single study; establishes gene structure but no functional mechanism\",\n      \"pmids\": [\"8595903\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"siRNA-mediated knockdown of Tcf19 in INS-1 β-cells caused decreased cell proliferation and increased apoptosis. Knockdown led to G1/S checkpoint arrest with reduced expression of cell cycle genes from late G1 through M phase, and increased ER stress susceptibility with reduced expression of ER homeostasis genes (Bip, p58(IPK), Edem1, calreticulin) and increased proapoptotic genes (Bim, Bid, Nix, Gadd34, Pdia2).\",\n      \"method\": \"siRNA knockdown in INS-1 β-cell line; BrdU proliferation assay; flow cytometry; qPCR for cell cycle and apoptosis gene expression\",\n      \"journal\": \"American journal of physiology. Endocrinology and metabolism\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — clean KD with defined cellular phenotype and multiple orthogonal readouts (proliferation, apoptosis, gene expression), single lab\",\n      \"pmids\": [\"23860123\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"TCF19 promotes cell proliferation in hepatocellular carcinoma (HepG2) cells through its PHD finger domain, which directly binds trimethylated lysine 4 of histone H3 (H3K4me3). Tryptophan 316 (W316) of the PHD finger is a critical residue for this interaction. Genome-wide microarray identified a large subset of cell survival and proliferation genes dependent on TCF19.\",\n      \"method\": \"PHD finger binding assay for H3K4me3; site-directed mutagenesis (W316 mutation); whole genome microarray; cell proliferation assays in HepG2 cells\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct biochemical binding assay for H3K4me3, mutagenesis validating critical residue, and genome-wide functional readout in single study\",\n      \"pmids\": [\"31746185\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"TCF19 overexpression in HCC cell lines enhances proliferation and G1/S cell cycle transition by inhibiting p57Kip2, p21Cip1, and p27Kip1 and upregulating cyclin D1 via AKT/FOXO1 signaling; AKT and FOXO1 inhibitors suppressed TCF19-driven proliferation.\",\n      \"method\": \"TCF19 overexpression in HCC cell lines; MTT and colony formation assays; flow cytometry; Western blot for cell cycle regulators; AKT and FOXO1 pharmacological inhibition\",\n      \"journal\": \"Neoplasma\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — overexpression with phenotypic readouts and pathway inhibitor rescue, single lab, multiple methods\",\n      \"pmids\": [\"30509085\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"TCF19 promotes G1/S cell cycle transition in non-small cell lung cancer (NSCLC) cells by inhibiting FOXO1, which reduces expression of p21, p27, and p57 while increasing cyclin D1. Chromatin immunoprecipitation (ChIP) assay confirmed TCF19 occupancy at the FOXO1-regulated target gene loci.\",\n      \"method\": \"TCF19 overexpression and knockdown in LAC and SCC cell lines; MTT, colony formation, anchorage-independent growth assays; flow cytometry; ChIP assay; qPCR\",\n      \"journal\": \"Cell biology international\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP assay confirming direct chromatin occupancy, multiple cell-based assays, single lab\",\n      \"pmids\": [\"31141247\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TCF19 interacts with p53 and co-regulates metabolic genes TIGAR and SCO2 in hepatocellular carcinoma. IP/MS studies showed that TCF19/p53 complexes contain either CBP (for transcriptional activation under short-term high glucose) or HDAC1 (for repression under prolonged high glucose), epigenetically programming TIGAR and SCO2 expression. TCF19 or p53 knockdown altered cellular lactate production, extracellular acidification rate, oxygen consumption rate, ATP production, and mitochondrial membrane potential.\",\n      \"method\": \"Co-immunoprecipitation and mass spectrometry (IP/MS); ChIP; luciferase reporter; siRNA knockdown; metabolic assays (OCR, ECAR, ATP, lactate); RNA-seq\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — IP/MS identifying TCF19/p53/CBP and TCF19/p53/HDAC1 complexes with ChIP validation and multiple functional metabolic readouts, single lab with orthogonal methods\",\n      \"pmids\": [\"34369624\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"TCF19 overexpression in INS-1 β-cells and human islets increased nucleotide incorporation without changes in cell cycle gene expression, and induced expression of DNA damage response (DDR) genes and genes involved in viral responses, immune system processes, and inflammation, revealing a role for TCF19 in regulating DDR and inflammatory gene networks in β-cells.\",\n      \"method\": \"TCF19 overexpression in INS-1 cells and human islets; RNA-seq; nucleotide incorporation assay; gene expression analysis\",\n      \"journal\": \"Metabolites\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — RNA-seq with overexpression in a single lab; mechanistic pathway placement is incomplete\",\n      \"pmids\": [\"34436454\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"TCF19 negatively regulates WWC1 expression in colorectal cancer cells. Silencing TCF19 attenuated proliferation and migration of HT29 cells; knockdown of WWC1 abolished the regulatory effects of TCF19, establishing a TCF19→WWC1 negative regulatory axis in CRC progression.\",\n      \"method\": \"siRNA knockdown of TCF19 and WWC1; overexpression of TCF19 in HCT-8 cells; cell viability, colony formation, migration assays; rescue experiments; qRT-PCR\",\n      \"journal\": \"European review for medical and pharmacological sciences\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — epistasis by knockdown/rescue, single lab, no direct binding or ChIP data for TCF19 at WWC1 locus\",\n      \"pmids\": [\"32016966\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"TCF19 promotes TRIM14 transcription in MSI endometrial cancer, activating the TBK1-IRF3-IFN-β pathway and enhanced IFN-β secretion, which facilitates CD8+ T cell exhaustion through cell differentiation reprogramming. TCF19 inhibition combined with anti-PD-1 therapy showed synergistic anti-tumor responses in humanized mouse models.\",\n      \"method\": \"TCF19 knockdown/overexpression; ChIP for TCF19 at TRIM14 promoter; cytokine measurement; T cell exhaustion marker analysis; humanized mouse tumor models; TCGA correlation analysis\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP validation of TCF19 binding to TRIM14 promoter, in vivo humanized models, multiple orthogonal methods, single lab\",\n      \"pmids\": [\"37566545\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"TCF19 promotes lung cancer cell growth and primary tumor development via the RAF/MEK/ERK signaling pathway. TCF19 overexpression increased phosphorylation of Raf1, MEK1/2, and ERK1/2; inhibiting RAF1 (shRaf1) or ERK reduced cell cycle proteins and inhibited growth of TCF19-overexpressing cells.\",\n      \"method\": \"TCF19 overexpression in A549 and Hop62 cells; transgenic mouse models; transcriptome sequencing; western blot for pathway phosphorylation; shRaf1 knockdown; ERK inhibitor treatment; functional growth assays\",\n      \"journal\": \"Translational oncology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pathway placement by epistasis (shRaf1/ERK inhibitor rescue of TCF19 overexpression phenotype), in vivo transgenic model, transcriptome, single lab\",\n      \"pmids\": [\"38701650\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"TCF19 is enriched on the CDKN2A promoter and activates CDKN2A transcription in osteosarcoma. Upregulation of CDKN2A by TCF19 promotes glycolysis and M2 macrophage polarization; TCF19 knockdown inhibited OS tumor growth, metabolic reprogramming, and CDKN2A expression in xenograft mice.\",\n      \"method\": \"ChIP-qPCR validating TCF19 binding to CDKN2A promoter; siRNA knockdown and pcDNA3.4 overexpression of CDKN2A; metabolic assays (ECAR, OCR); macrophage co-culture (CD206/CD86, IL-10/IL-12 measurement); xenograft OS mouse model\",\n      \"journal\": \"FASEB journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP-qPCR confirming direct TCF19 binding to CDKN2A promoter, in vivo xenograft, metabolic and immune functional readouts, single lab\",\n      \"pmids\": [\"40193126\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"TCF19 promotes breast cancer EMT and metastasis by suppressing miR-199a-5p expression, which leads to altered SP1 nuclear dynamics and increased SP1 binding to the LOXL2 promoter, upregulating LOXL2 and driving migration, invasion, and EMT. TCF19 knockdown reduced xenograft tumor growth and metastatic establishment.\",\n      \"method\": \"TCF19 knockdown in BC cell lines; in vitro migration/invasion/EMT assays; miR-199a-5p overexpression; SP1 ChIP at LOXL2 promoter; subcutaneous and tail-vein xenograft models\",\n      \"journal\": \"Cancer letters\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — ChIP data for SP1 (not TCF19 directly), indirect TCF19→miR-199a-5p→SP1→LOXL2 axis, single lab\",\n      \"pmids\": [\"38851313\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"A genetic variant (rs3094187), in high LD with the SCCHN-associated SNP rs3131018, was shown to modify TCF19 expression by regulating the binding affinity of transcription factor SREBF1 to the TCF19 promoter, establishing SREBF1 as a transcriptional regulator of TCF19.\",\n      \"method\": \"Luciferase reporter assay; electrophoretic mobility shift assay (EMSA); ChIP for SREBF1 at TCF19 promoter; allele-specific binding assay\",\n      \"journal\": \"Journal of medical genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — EMSA and reporter assay demonstrating allele-specific SREBF1 binding to TCF19 promoter, single lab, two orthogonal methods\",\n      \"pmids\": [\"34085947\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"TCF19 binds to the DHX32 promoter and activates DHX32 transcription in glioma cells, and the TCF19-DHX32 axis activates β-catenin signaling to promote glioma cell proliferation and cell cycle progression while suppressing apoptosis. Overexpression of DHX32 rescued the anti-proliferative effects of TCF19 knockdown.\",\n      \"method\": \"ChIP-qRT-PCR and luciferase reporter assay for TCF19 binding at DHX32 promoter; TCF19 knockdown and DHX32 overexpression rescue experiments; MTT, FACS, xenograft assays; Western blot for β-catenin pathway\",\n      \"journal\": \"Current cancer drug targets\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP and reporter assay confirming direct TCF19 binding to DHX32 promoter, epistatic rescue experiment, single lab\",\n      \"pmids\": [\"39838676\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"TCF19 is a nuclear transcription factor containing a PHD finger (which reads H3K4me3 chromatin marks) and an FHA domain; it directly binds gene promoters to regulate cell cycle progression, proliferation, and survival—notably by modulating cyclin D1/CDK inhibitor expression via AKT/FOXO1 signaling, activating metabolic genes (TIGAR, SCO2) in complex with p53 and either CBP or HDAC1 depending on glucose conditions, promoting transcription of TRIM14 (activating TBK1-IRF3-IFN-β), CDKN2A, and DHX32 (activating β-catenin), and is itself transcriptionally regulated by SREBF1; loss-of-function in pancreatic β-cells impairs proliferation and induces ER stress and apoptosis.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"TCF19 is a chromatin-associated transcriptional regulator that drives cell cycle progression, proliferation, and survival across multiple cell types [#1, #2]. It reads activating chromatin marks through a PHD finger that directly binds H3K4me3, an interaction that depends on the critical residue tryptophan 316 and is required for the proliferative program controlled by a broad set of survival and proliferation genes [#2]. TCF19 occupies target promoters directly—including FOXO1-regulated loci, the TRIM14, CDKN2A, and DHX32 promoters—and thereby tunes downstream transcriptional outputs: it promotes G1/S transition by suppressing the CDK inhibitors p21, p27, and p57 while upregulating cyclin D1 via AKT/FOXO1 signaling [#3, #4], activates TRIM14 to engage the TBK1-IRF3-IFN-\\u03b2 axis [#8], activates CDKN2A to reprogram glycolysis and macrophage polarization [#10], and activates DHX32 to engage \\u03b2-catenin signaling [#13]. TCF19 also forms a complex with p53 that recruits either CBP for activation or HDAC1 for repression to epigenetically program the metabolic genes TIGAR and SCO2 in a glucose-dependent manner, controlling cellular glycolytic and oxidative metabolism [#5]. Its own expression is controlled transcriptionally by SREBF1 binding at the TCF19 promoter [#12]. In pancreatic \\u03b2-cells, loss of TCF19 arrests proliferation at the G1/S checkpoint and sensitizes cells to ER stress and apoptosis [#1].\",\n  \"teleology\": [\n    {\n      \"year\": 1995,\n      \"claim\": \"Before any function was known, the genomic identity and structure of TCF19 had to be defined; mapping it to chromosome 6p21.3 within the MHC class I region and resolving its three-exon structure established it as a discrete gene.\",\n      \"evidence\": \"Transposon-based nested deletion sequencing and genomic mapping of a 5.5-kb fragment near HLA-C/POU5F1\",\n      \"pmids\": [\"8595903\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No protein function, domain activity, or expression pattern established\", \"No link to chromatin or transcription\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"The first functional test asked what TCF19 does in a physiological cell type; knockdown in \\u03b2-cells revealed it is required for proliferation, cell cycle progression, and protection from ER stress and apoptosis.\",\n      \"evidence\": \"siRNA knockdown in INS-1 \\u03b2-cells with proliferation, flow cytometry, and qPCR readouts\",\n      \"pmids\": [\"23860123\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of cell cycle gene regulation not defined\", \"No direct DNA or chromatin binding shown\", \"Limited to a single cell line\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"The molecular route to cell cycle control was placed on a defined signaling axis: TCF19 drives G1/S transition by inhibiting CDK inhibitors and inducing cyclin D1 through AKT/FOXO1.\",\n      \"evidence\": \"Overexpression in HCC lines with pharmacological AKT/FOXO1 inhibition and Western blot for cell cycle regulators\",\n      \"pmids\": [\"30509085\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Did not demonstrate direct TCF19 promoter binding\", \"Whether AKT/FOXO1 modulation is direct or indirect unresolved\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Two complementary studies established TCF19 as a direct chromatin reader and DNA-occupying factor: it binds H3K4me3 via its PHD finger (W316-dependent) and occupies FOXO1-regulated target loci.\",\n      \"evidence\": \"PHD finger H3K4me3 binding assay with W316 mutagenesis and genome-wide microarray in HepG2; ChIP at FOXO1 target loci in NSCLC cells\",\n      \"pmids\": [\"31746185\", \"31141247\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide direct binding sites not mapped by ChIP-seq\", \"How PHD reading connects to specific promoter selection unresolved\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"The work expanded TCF19 into a metabolic regulator and defined a context-dependent transcriptional mechanism: TCF19/p53 complexes recruit CBP or HDAC1 depending on glucose to program TIGAR and SCO2.\",\n      \"evidence\": \"IP/MS, ChIP, luciferase reporter, and metabolic assays (OCR, ECAR, ATP, lactate) in HCC cells\",\n      \"pmids\": [\"34369624\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"What determines CBP vs HDAC1 selection mechanistically unresolved\", \"Direct vs p53-dependent DNA contact of TCF19 not separated\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Additional findings positioned TCF19 within DNA-damage/inflammatory gene networks in \\u03b2-cells and identified SREBF1 as an upstream transcriptional regulator binding the TCF19 promoter.\",\n      \"evidence\": \"Overexpression plus RNA-seq in INS-1 cells and human islets; luciferase, EMSA, and ChIP for SREBF1 at the TCF19 promoter\",\n      \"pmids\": [\"34436454\", \"34085947\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct targets of TCF19 within DDR/inflammatory networks not identified\", \"Functional consequence of SREBF1-driven TCF19 expression not tested phenotypically\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"TCF19 was linked to immune evasion through direct promoter activation: it drives TRIM14 transcription to engage the TBK1-IRF3-IFN-\\u03b2 axis and promote CD8+ T cell exhaustion, with therapeutic synergy alongside anti-PD-1.\",\n      \"evidence\": \"ChIP at the TRIM14 promoter, cytokine and T cell exhaustion analysis, and humanized mouse tumor models\",\n      \"pmids\": [\"37566545\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether IFN-\\u03b2-driven exhaustion generalizes beyond MSI endometrial cancer unknown\", \"Structural basis of TCF19 promoter recognition not defined\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Further studies broadened TCF19's direct transcriptional targets and signaling outputs: it activates CDKN2A to reprogram glycolysis and macrophage polarization and engages RAF/MEK/ERK signaling to drive tumor growth.\",\n      \"evidence\": \"ChIP-qPCR at the CDKN2A promoter with metabolic and macrophage co-culture assays and xenografts; transcriptome and Western blot for RAF/MEK/ERK phosphorylation with shRaf1/ERK inhibitor rescue in lung cancer\",\n      \"pmids\": [\"40193126\", \"38701650\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"How CDKN2A activation is reconciled with proliferation promotion unresolved\", \"Whether RAF/MEK/ERK activation is a direct transcriptional consequence not established\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"TCF19 was shown to directly activate DHX32 transcription to engage \\u03b2-catenin signaling, with DHX32 re-expression rescuing the proliferative defect of TCF19 loss, confirming an epistatic transcriptional axis.\",\n      \"evidence\": \"ChIP-qRT-PCR and luciferase reporter at the DHX32 promoter with TCF19 knockdown/DHX32 overexpression rescue in glioma cells and xenografts\",\n      \"pmids\": [\"39838676\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether DHX32 is a direct or context-specific target across tissues unknown\", \"Mechanism connecting DHX32 to \\u03b2-catenin not detailed\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"A unified picture of how TCF19's PHD-mediated H3K4me3 reading selects among its many reported direct promoter targets, and how it switches between activation and repression complexes, remains unresolved.\",\n      \"evidence\": \"No genome-wide ChIP-seq integrating chromatin reading with target selection in the available corpus\",\n      \"pmids\": [],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"No structural model of the PHD/FHA domains in action\", \"No genome-wide direct binding map\", \"Determinants of coactivator vs corepressor recruitment unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [3, 4, 5, 8, 10, 13]},\n      {\"term_id\": \"GO:0042393\", \"supporting_discovery_ids\": [2]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [4, 8, 10, 13]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [2, 4, 5]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [4, 5, 8, 10, 13]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [1, 3, 4]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [2, 5]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [3, 9, 13]}\n    ],\n    \"complexes\": [\"TCF19/p53/CBP\", \"TCF19/p53/HDAC1\"],\n    \"partners\": [\"TP53\", \"CBP\", \"HDAC1\", \"FOXO1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":6,"faith_total":6,"faith_pct":100.0}}