{"gene":"NEUROD1","run_date":"2026-06-10T05:19:52","timeline":{"discoveries":[{"year":1995,"finding":"NeuroD (NEUROD1) is a bHLH transcription factor that, when ectopically expressed in Xenopus embryos, converts presumptive epidermal cells into fully differentiated neurons and causes premature differentiation of neuronal precursors, demonstrating it acts as a neuronal differentiation/determination factor capable of bypassing normal inhibitory signals.","method":"Ectopic expression in Xenopus embryos (gain-of-function), morphological and molecular phenotypic readout","journal":"Science","confidence":"High","confidence_rationale":"Tier 1 / Strong — foundational gain-of-function experiment in Xenopus with clear phenotypic readout, replicated across multiple subsequent labs","pmids":["7754368"],"is_preprint":false},{"year":1997,"finding":"BETA2/NeuroD (NEUROD1) is required for normal pancreatic islet morphogenesis and terminal differentiation of insulin-producing beta cells; knockout mice develop severe diabetes with striking reduction in beta cell number and failure to form mature islets, and also fail to develop secretin- and cholecystokinin-producing enteroendocrine cells.","method":"Gene targeting / knockout mice, histology, immunocytochemistry","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean loss-of-function knockout with defined cellular and physiological phenotype, widely replicated","pmids":["9308961"],"is_preprint":false},{"year":1997,"finding":"NeuroD1/beta2 is expressed in corticotroph cells of the pituitary and forms heterodimeric complexes (CUTE complexes) with ubiquitous bHLH dimerization partners that specifically bind and activate transcription from the POMC promoter E-box; NeuroD1 heterodimers activate transcription in synergy with the homeodomain protein Ptx1.","method":"Co-immunoprecipitation, EMSA, reporter gene transactivation assays, in situ hybridization","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP, EMSA, and functional reporter assays in single lab with multiple orthogonal methods","pmids":["9343431"],"is_preprint":false},{"year":1999,"finding":"NeuroD plays multiple roles in developing rodent retina: it acts as a critical regulator of neuron versus glial cell fate (NeuroD-null retinas show 3-4 fold increase in Müller glia), promotes amacrine over bipolar interneuron differentiation, and is essential for survival of a subset of rod photoreceptors.","method":"Loss-of-function (NeuroD-null mice retinal explants), gain-of-function (retroviral forced expression in rat), cell counting and marker analysis","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 / Moderate — complementary loss- and gain-of-function with defined cellular phenotypes, multiple orthogonal methods","pmids":["9834183"],"is_preprint":false},{"year":2000,"finding":"BETA2/NeuroD is required for proliferation of dentate granule cell precursors after migration and for their differentiation; loss of BETA2/NeuroD results in failure to develop a dentate gyrus granule cell layer and causes spontaneous limbic seizures.","method":"BETA2/NeuroD null mice, immunocytochemistry, electrophysiology","journal":"PNAS","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean knockout with defined cellular (proliferation/differentiation defect) and functional (seizure) phenotype","pmids":["10639171"],"is_preprint":false},{"year":2000,"finding":"Neurogenin 3 (ngn3) acts upstream of BETA2/NeuroD and directly activates the BETA2 promoter through two proximal E-box sequences (E1 and E3) by binding as an ngn3-E47 heterodimer, placing BETA2/NeuroD downstream of ngn3 in the pancreatic endocrine differentiation cascade.","method":"Ectopic expression in Xenopus, promoter deletion/mutation analysis, EMSA, reporter gene assays in endocrine cell lines","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro promoter reconstitution with mutagenesis and in vivo ectopic expression, multiple methods in one study","pmids":["10757813"],"is_preprint":false},{"year":2002,"finding":"Math3 and NeuroD are functionally redundant for amacrine cell fate specification in the retina; in Math3-NeuroD double-mutant retina, amacrine cells are completely absent and cells that would become amacrine cells adopt ganglion and glial fates instead. Co-expression of Math3 or NeuroD with homeodomain proteins Pax6 or Six3 is required to specify amacrine cell fate.","method":"Double-knockout mice, retinal explant cultures, misexpression experiments","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic epistasis via double knockout with clear cell fate shift phenotype, complementary misexpression","pmids":["11861467"],"is_preprint":false},{"year":2004,"finding":"CaMKII phosphorylates NeuroD at distinct sites including Ser336 in primary neurons, and this phosphorylation stimulates NeuroD transcriptional activity and dendritic growth; genetic knockdown of NeuroD in cerebellar granule neurons impairs dendritic generation and maintenance while sparing axonal development, defining a CaMKII-NeuroD signaling pathway for activity-dependent dendritogenesis.","method":"Genetic knockdown in primary neurons and organotypic cerebellar slices, in vitro kinase assay, site-directed mutagenesis, dendritic morphometry","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 1 / Moderate — in vitro kinase assay with mutagenesis plus loss-of-function with defined morphological phenotype, multiple orthogonal methods","pmids":["14741104"],"is_preprint":false},{"year":2004,"finding":"The SWI/SNF catalytic subunit Brg1 physically associates with NeuroD and is essential for NeuroD-mediated transactivation; loss of Brg1 function abolishes the ability of NeuroD to drive neuronal differentiation in Xenopus and mammalian P19 cells.","method":"Co-immunoprecipitation (Brg1-NeuroD physical interaction), dominant-negative Brg1, reporter gene transactivation assays, gain/loss-of-function in Xenopus and P19 cells","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP plus functional reporter assays and phenotypic rescue, multiple methods","pmids":["15576411"],"is_preprint":false},{"year":2005,"finding":"FoxO1 forms a complex with PML and Sirt1 to activate NeuroD (and MafA) expression, protecting beta cells against oxidative stress; acetylation of FoxO1 targets it to PML and prevents its ubiquitin-dependent degradation, linking glucose/growth factor signaling to NeuroD expression.","method":"Co-immunoprecipitation (FoxO1-Pml-Sirt1 complex), acetylation-defective and acetylation-mimicking mutants, transgenic mouse model, reporter assays","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP of complex plus mutagenesis of post-translational modification sites and in vivo mouse validation","pmids":["16154098"],"is_preprint":false},{"year":2005,"finding":"BETA2/NeuroD protein contains an arginine- and lysine-rich protein transduction domain (PTD) that allows it to permeate cells via macropinocytosis; once internalized it is released from endosomes to the cytoplasm and nucleus, where it binds the insulin promoter and activates insulin gene expression.","method":"Protein transduction experiments, subcellular fractionation/imaging, insulin promoter binding assay, dose-response analysis","journal":"Diabetes","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — single lab with functional readout, but mechanism of PTD-mediated entry characterized by pharmacological inhibition and imaging","pmids":["16186386"],"is_preprint":false},{"year":2005,"finding":"NeuroD1 acts as both a transcriptional activator (of insulin and IAPP) and a transcriptional repressor (of somatostatin) in the same cell; ectopic NeuroD1 in a delta-cell line represses somatostatin and induces beta-cell genes including Nkx2.2, demonstrating dual activator/repressor function.","method":"Ectopic expression in pancreatic delta-cell line (TRM-6/PDX-1), reporter gene assays with insulin and somatostatin promoters, immunostaining","journal":"Developmental dynamics","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — single lab, functional reporter assays with defined promoters plus cell-type-specific expression analysis","pmids":["15906379"],"is_preprint":false},{"year":2006,"finding":"INSM1 binds to the neuroD/beta2 promoter and represses its transcription by recruiting cyclin D1 and histone deacetylases HDAC-1 and HDAC-3; cyclin D1 mediates the interaction between INSM1 and HDACs, and overexpression of cyclin D1 plus HDAC-3 enhances INSM1-mediated repression.","method":"Yeast two-hybrid, in vitro and in vivo pull-down assays, co-immunoprecipitation, ChIP, reporter gene transactivation assays","journal":"Biochemical journal","confidence":"High","confidence_rationale":"Tier 2 / Moderate — multiple orthogonal methods (Y2H, pulldown, co-IP, ChIP, reporter) in single lab establishing the transcriptional repression complex","pmids":["16569215"],"is_preprint":false},{"year":2007,"finding":"Crystal structure of the E47-NeuroD1 bHLH domain heterodimer in complex with the insulin promoter E-box (CATCTG) was determined; E47 and NeuroD1 interactions in the heterodimer are comparable to E47 homodimer interactions, suggesting NeuroD1 homodimer instability drives heterodimer preference. NeuroD1 neurogenic-specific residue His115 makes an additional phosphate backbone contact that orients the heterodimer uniquely on the E-box.","method":"X-ray crystallography, protein purification, structural analysis","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — crystal structure determination with structure-function interpretation, single lab","pmids":["18069799"],"is_preprint":false},{"year":2007,"finding":"NeuroD and Neurogenin bind distinct consensus E-box sequences and regulate largely overlapping yet distinct sets of neuronal differentiation genes; they act through enhancers containing clustered, conserved consensus-binding sites to activate transcription factors, signal transducers, and cytoskeletal regulators for neuronal differentiation and migration.","method":"Target gene identification by expression profiling in Xenopus and mouse, ChIP, enhancer reporter assays in Xenopus, computational motif analysis","journal":"The EMBO journal","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus functional reporter assays and cross-species conservation, multiple methods","pmids":["18007592"],"is_preprint":false},{"year":2007,"finding":"C/EBPalpha/beta and NeuroD form complexes in vitro and in vivo and are co-recruited to the promoters of immediate-early genes Fos, Egr1, and Egr2 in response to BDNF/TrkB signaling; C/EBPalpha and NeuroD cooperatively activate the Fos promoter via a combined C/EBP-Ebox element.","method":"Co-immunoprecipitation (in vitro and in vivo), ChIP, reporter gene transactivation, genetic depletion of Trk receptors","journal":"Neural development","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP plus ChIP and functional reporter assay, single lab, multiple methods","pmids":["17254333"],"is_preprint":false},{"year":2002,"finding":"BETA2/NeuroD activates the mouse sulfonylurea receptor 1 (SUR1) gene through a specific E-box element (E3 at -141) in cooperation with E47; a dominant-negative BETA2/NeuroD represses SUR1 promoter activity, and mutation of E3 eliminates BETA2/NeuroD stimulation, establishing direct transcriptional regulation of SUR1 by BETA2/NeuroD.","method":"Reporter gene assays, EMSA, dominant-negative constructs, promoter deletion/mutation analysis","journal":"Molecular endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — EMSA plus reporter assays with mutagenesis and dominant-negative in multiple cell lines, single lab","pmids":["11981044"],"is_preprint":false},{"year":2002,"finding":"c-Myc suppresses insulin gene transcription by competing with NeuroD/BETA2 for binding to the E-box element in the insulin promoter; c-Myc does not activate insulin gene expression and lacks a coactivator interaction with p300 (which is a NeuroD coactivator), providing the mechanism for c-Myc-mediated inhibition of NeuroD function.","method":"Gel-shift (EMSA), reporter gene assays with E-box mutant promoters, co-expression in multiple cell lines including primary islets, adenoviral overexpression","journal":"Journal of Biological Chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — EMSA plus reporter assays with mutagenesis and adenoviral overexpression, multiple cell types, single lab","pmids":["11799123"],"is_preprint":false},{"year":2002,"finding":"BETA2/NeuroD activates transcription of the secretin gene through E-box binding; the zinc finger protein Finb/RREB-1 physically associates with BETA2 and potentiates its transcriptional activation of the secretin gene by DNA binding to an adjacent cis-element, requiring both DNA binding and physical interaction with BETA2.","method":"Expression cloning, co-immunoprecipitation, reporter gene assays, promoter mutation analysis","journal":"Molecular and cellular biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — expression cloning plus co-IP and functional reporter with mutagenesis, single lab","pmids":["12482979"],"is_preprint":false},{"year":2002,"finding":"Id2 inhibits BETA2/NeuroD function by interacting with E47 (the bHLH dimerization partner) and blocking BETA2/NeuroD binding to its E-box target sequence, thereby inhibiting E-box-mediated gene expression in a dose-dependent manner.","method":"Yeast two-hybrid, EMSA, reporter gene assays, co-expression in HIT and HeLa cells","journal":"Experimental & molecular medicine","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — EMSA plus reporter assays, single lab, mechanism via E47 interaction","pmids":["12526101"],"is_preprint":false},{"year":2002,"finding":"Glucose stimulation of the MEK-ERK (MAPK) signaling pathway promotes NeuroD1 nuclear localization in MIN6 beta-cells; at low glucose NeuroD1 is predominantly cytoplasmic, and at high glucose it translocates to the nucleus. Mutation of the MAPK phosphorylation site S274A or MEK inhibition increases cytoplasmic NeuroD1 at high glucose and attenuates NeuroD1-mediated transcription.","method":"Subcellular fractionation/immunofluorescence, MEK inhibitor (PD98059), site-directed mutagenesis (S274A), reporter gene assay","journal":"FEBS letters","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — subcellular localization with pharmacological and mutagenesis validation plus functional reporter, single lab","pmids":["12297313"],"is_preprint":false},{"year":2003,"finding":"Huntingtin (Htt) interacts with NeuroD (ND) indirectly via huntingtin-associated protein 1 (HAP1), and mixed-lineage kinase 2 (MLK2) phosphorylates and stimulates NeuroD activity; Htt and HAP1 facilitate MLK2-mediated activation of NeuroD, identifying NeuroD as the first neuron-specific transcription factor whose activity is modulated by Htt.","method":"Yeast two-hybrid screen, co-immunoprecipitation, kinase assay, reporter gene transactivation assays","journal":"PNAS","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Y2H plus co-IP and in vitro kinase assay with reporter assays, multiple methods in single lab","pmids":["12881483"],"is_preprint":false},{"year":2007,"finding":"Cell surface heparan sulfate proteoglycans are required for BETA2/NeuroD protein internalization; soluble heparin and heparinase III treatment impair NeuroD entry, while chondroitin sulfate and chondroitinase are ineffective; mutant CHO cell lines deficient in GAG biosynthesis confirm that selective sulfation of heparan sulfate is important for NeuroD-heparan sulfate recognition.","method":"Competitive inhibition with soluble GAGs, enzymatic treatment (heparinase III, chondroitinase), GAG-biosynthesis-deficient CHO mutant cell lines","journal":"Human gene therapy","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple genetic and biochemical approaches establishing receptor requirement, single lab","pmids":["17149999"],"is_preprint":false},{"year":2008,"finding":"NeuroD1 is required for sustained expression of thyroid hormone receptor beta2 (TRbeta2) in immature cone photoreceptors; NeuroD1-deficient mice display an opsin phenotype identical to TRbeta2-deficient mice (uniform S-opsin, loss of M-opsin), and NeuroD1 directly binds an E-box in the TRbeta2 intron control region. Reintroduction of NeuroD1 into NeuroD1-null retinal explants restores TRbeta2 expression.","method":"NeuroD1 knockout mice, ChIP (E-box binding), retinal explant rescue experiment, opsin immunostaining","journal":"Journal of Neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Moderate — loss-of-function with defined molecular phenotype (TRbeta2 loss), ChIP, and rescue experiment, multiple methods","pmids":["18199774"],"is_preprint":false},{"year":2010,"finding":"NeuroD activity is regulated downstream of mu-opioid receptor agonists via CaMKIIalpha-dependent phosphorylation: morphine reduces CaMKIIalpha activity and thus net NeuroD activity, while fentanyl maintains NeuroD activity by also increasing NeuroD protein level through suppression of miR-190. Decreased NeuroD activity leads to reduced dendritic spine stability, which can be rescued by NeuroD overexpression.","method":"CaMKII activity assays, miR-190 overexpression, KN93 inhibitor, NeuroD overexpression rescue, dendritic spine morphometry, downstream target gene mRNA measurement","journal":"Journal of Neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological and genetic manipulation with functional spine stability readout, multiple methods, single lab","pmids":["20554861"],"is_preprint":false},{"year":2010,"finding":"NeuroD is required for beta cell maturation and functional glucose responsiveness; conditional deletion of neuroD in insulin-expressing cells results in severe glucose intolerance, poor glucose-stimulated insulin secretion, a metabolic profile resembling immature beta cells (elevated glycolytic genes, LDHA, elevated basal insulin secretion), defective K(ATP) channel-mediated insulin secretion, and near-complete loss of ins1 expression.","method":"Conditional knockout mice (insulin-Cre), glucose tolerance tests, insulin secretion assays, gene expression analysis, metabolic profiling","journal":"Cell metabolism","confidence":"High","confidence_rationale":"Tier 2 / Strong — conditional knockout with multiple defined functional phenotypes, replicated across methods","pmids":["20374962"],"is_preprint":false},{"year":2010,"finding":"Neurod1 is essential for survival of most spiral and vestibular neurons; conditional deletion in the ear results in vestibular and cochlear afferents projecting centrally as a single mixed nerve (rather than segregated), disorganized peripheral innervation with collaterals to multiple endorgans, and loss of tonotopic organization.","method":"Conditional knockout (Pax2-Cre), anatomical tracing, immunofluorescence, comparison with systemic null mice","journal":"Cell and tissue research","confidence":"High","confidence_rationale":"Tier 2 / Moderate — conditional knockout with defined axon guidance and survival phenotype using anatomical methods","pmids":["20512592"],"is_preprint":false},{"year":2010,"finding":"Neurod1 suppresses hair cell differentiation in inner ear sensory ganglia; conditional deletion of Neurod1 in the ear results in Atoh1 expression and hair cell differentiation within the ganglion. Neurod1 also regulates hair cell subtype differentiation in the cochlea, with conditional null mice showing premature gene expression changes in the cochlear apex and transformation of outer hair cells into inner hair cells.","method":"Conditional knockout (Pax2-Cre), immunofluorescence, in situ hybridization, gene expression analysis","journal":"PLoS One","confidence":"High","confidence_rationale":"Tier 2 / Moderate — conditional knockout with defined cell fate and subtype specification phenotypes, multiple markers","pmids":["20661473"],"is_preprint":false},{"year":2013,"finding":"NeuroD1 promotes survival and migration in neuroendocrine lung carcinomas by regulating expression of the receptor tyrosine kinase TrkB and the prometastatic signaling molecule NCAM as downstream target genes.","method":"NeuroD1 knockdown/loss-of-function in SCLC cell lines, gene expression analysis, functional migration and survival assays","journal":"PNAS","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — loss-of-function with defined downstream targets and migration/survival phenotype, single lab","pmids":["23553831"],"is_preprint":false},{"year":2015,"finding":"NeuroD1 acts as a pioneer transcription factor that directly binds epigenetically silenced regulatory elements of neuronal genes, reprogramming heterochromatin to euchromatin and remodeling the transcription factor landscape to establish transcriptional competence; NeuroD1 also induces epithelial-to-mesenchymal transition genes to promote neuronal migration. These epigenetic changes are maintained beyond the transient NeuroD1 induction (epigenetic memory).","method":"ChIP-seq, ATAC-seq, RNA-seq, chromatin accessibility assays, conditional NeuroD1 induction system in neural progenitors","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1 / Moderate — genome-wide ChIP-seq plus chromatin accessibility and transcriptome analysis with multiple orthogonal methods in single rigorous study","pmids":["26516211"],"is_preprint":false},{"year":2015,"finding":"Insm1, Neurod1, and Foxa2 directly interact with each other and together co-occupy regulatory sequences in the genome of mature pancreatic beta-cells; combinatorial binding of Insm1/Neurod1/Foxa2 (not Insm1 alone) explains a significant fraction of gene expression changes controlling beta-cell maturity.","method":"Co-immunoprecipitation (direct interaction of Insm1, Neurod1, Foxa2), ChIP-seq (co-occupancy), conditional Insm1 ablation in adult beta-cells, gene expression analysis","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP plus ChIP-seq co-occupancy and conditional knockout, multiple orthogonal methods","pmids":["25828096"],"is_preprint":false},{"year":2016,"finding":"NEUROD1 binds distinct genomic loci from ASCL1 in SCLC cells, regulates a mostly distinct set of genes, and targets the oncogene MYC; NEUROD1 is not required for mouse SCLC tumor formation (unlike ASCL1) but promotes malignant survival behavior in human SCLC cell lines.","method":"ChIP-seq (NEUROD1 vs ASCL1 genomic binding), gene expression analysis, CRISPR/siRNA knockdown, SCLC mouse models","journal":"Cell Reports","confidence":"High","confidence_rationale":"Tier 2 / Moderate — ChIP-seq with functional loss-of-function and mouse model, multiple orthogonal methods","pmids":["27452466"],"is_preprint":false},{"year":2017,"finding":"NeuroD factors (Neurod1, Neurod2, Neurod6) act as DNA-binding-dependent coactivators for the mineralocorticoid receptor (MR) but not glucocorticoid receptor (GR) in the hippocampus by binding an Atoh/NeuroD consensus sequence adjacent to MR-specific GREs; Neurod2 is detected at hippocampal MR binding sites but not GR-exclusive sites, providing a mechanism for MR vs GR DNA-binding selectivity.","method":"ChIP-seq (MR, GR), de novo motif analysis, co-occupancy analysis, reporter gene assays in HEK293 cells","journal":"Endocrinology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP-seq plus functional reporter assays, single lab, but findings are genome-wide with functional validation","pmids":["28324065"],"is_preprint":false},{"year":2019,"finding":"NeuroD1 functions as a pioneer transcription factor in microglia-to-neuron reprogramming by initially occupying closed chromatin regions marked by bivalent H3K4me3/H3K27me3 in microglia; these regions are subsequently resolved to monovalent H3K4me3 as neuronal identity is established. NeuroD1 also induces transcriptional repressors Scrt1 and Meis2 to decrease microglial gene expression, while erasing the microglial epigenetic signature.","method":"ChIP-seq (H3K4me3, H3K27me3), ATAC-seq, RNA-seq, lentiviral NeuroD1 expression in microglia in vitro and in vivo","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 1 / Moderate — genome-wide epigenome and transcriptome profiling with multiple orthogonal methods in single rigorous study","pmids":["30638745"],"is_preprint":false},{"year":2021,"finding":"NeuroD1 expression induces apoptosis in microglia rather than converting them to neurons; lineage tracing revealed non-specific leakage of lentiviruses previously used in microglia-to-neuron conversion experiments, indicating that prior reports of NeuroD1-mediated microglia-to-neuron cross-lineage reprogramming were artifactual.","method":"Lineage tracing with strict Cre-lox reporter, live imaging, conditional NeuroD1 expression in microglia, cell death assays","journal":"Neuron","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — rigorous lineage tracing plus cell death assays refuting a prior claim, single lab contradicting PMID 30638745","pmids":["34875233"],"is_preprint":false},{"year":2021,"finding":"NEUROD1 is required for early alpha and beta endocrine cell differentiation during mouse pancreas development; Neurod1 inactivation impairs expression of key transcription factors for alpha- and beta-cell differentiation, beta-cell proliferation, and insulin production, altering H3K27me3 histone modification patterns in promoter regions of differentially expressed genes.","method":"Conditional knockout mice, transcriptome analysis, chromatin landscape (H3K27me3 ChIP), immunofluorescence","journal":"International Journal of Molecular Sciences","confidence":"High","confidence_rationale":"Tier 2 / Moderate — conditional knockout with transcriptome and epigenome analysis, multiple orthogonal methods","pmids":["34201511"],"is_preprint":false},{"year":2022,"finding":"NeuroD1 cooperates with Tcf12 to drive neuronal migration during cortical development; Tcf12 forms a physical complex with NeuroD1, co-occupies a subset of NeuroD1 target loci, and their cooperation activates chromatin and target genes required for cell migration. In vivo manipulation demonstrates Tcf12 is essential for correct migration of newborn neurons and cortical lamination.","method":"Co-immunoprecipitation (Tcf12-NeuroD1 complex), ChIP-seq (co-occupancy), ATAC-seq, conditional in vivo manipulation, cortical migration assays","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP, co-occupancy ChIP-seq, and in vivo functional validation, multiple orthogonal methods","pmids":["35147187"],"is_preprint":false},{"year":2023,"finding":"NEUROD1 reinforces endocrine lineage commitment and differentiation in the developing pancreas by maintaining a chromatin landscape permissive for endocrine gene expression; Neurod1 inactivation triggers downregulation of endocrine differentiation transcription factors and upregulation of non-endocrine genes, altering H3K27me3 modification patterns in promoter regions of affected genes.","method":"Conditional knockout, transcriptome sequencing, chromatin landscape analysis (H3K27me3 ChIP-seq), ATAC-seq","journal":"Nature Communications","confidence":"High","confidence_rationale":"Tier 2 / Moderate — conditional knockout with genome-wide transcriptome and epigenome profiling, multiple orthogonal methods","pmids":["37689751"],"is_preprint":false},{"year":2023,"finding":"BET proteins (BRD2/3/4) physically interact with NEUROD1 and function as its transcriptional coactivators in SCLC; NEUROD1 plays a critical role in defining BET protein genomic occupancy landscapes in SCLC, and BET inhibition broadly suppresses NEUROD1-target genes (especially superenhancer-associated), inhibiting SCLC growth in vitro and in vivo.","method":"Co-immunoprecipitation (NEUROD1-BET interaction), CRISPR knockout, ChIP-seq, SCLC xenograft in vivo experiments","journal":"Molecular cancer research","confidence":"High","confidence_rationale":"Tier 2 / Moderate — co-IP plus ChIP-seq and in vivo validation with CRISPR knockout, multiple methods","pmids":["36378541"],"is_preprint":false},{"year":2021,"finding":"NeuroD1 directly binds the G6PD promoter to activate G6PD transcription, stimulating the pentose phosphate pathway in colorectal cancer cells to enhance nucleotide and NADPH production, reduce ROS, and promote DNA/lipid biosynthesis and tumor cell proliferation.","method":"ChIP (NeuroD1 binding to G6PD promoter), reporter gene assays, metabolic flux analysis, knockdown/overexpression with proliferation and tumorigenic readouts","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus reporter assays and functional metabolic/proliferation readouts, single lab","pmids":["34657129"],"is_preprint":false},{"year":2015,"finding":"In zebrafish, NeuroD governs photoreceptor genesis via non-cell-autonomous mechanisms and functions through Notch signaling: NeuroD knockdown increases Notch pathway gene expression, and Notch inhibition rescues the cell cycle exit defect (but not photoreceptor maturation) caused by NeuroD knockdown. During adult photoreceptor regeneration, NeuroD knockdown prevents cell cycle exit and regeneration, and Notch inhibition rescues this phenotype.","method":"Genetic mosaic analysis, morpholino knockdown, CRISPR/Cas9 mutation, pharmacologic Notch inhibition, transgenic Notch activation, in situ hybridization, qRT-PCR","journal":"Investigative ophthalmology & visual science","confidence":"High","confidence_rationale":"Tier 2 / Moderate — multiple complementary genetic and pharmacological approaches establishing pathway epistasis, rigorous experimental design","pmids":["26580854"],"is_preprint":false},{"year":2019,"finding":"NEUROD1 is required for differentiation of human embryonic stem cells (HESCs) into insulin-expressing beta cells; inactivation of NEUROD1 in HESCs severely impairs differentiation from pancreatic progenitors and prevents full activation of the beta-cell transcription factor network. In mice, Neurod1 is required for perinatal proliferation of alpha- and beta-cells.","method":"NEUROD1 inactivation in HESCs, mouse conditional knockout, flow cytometry, gene expression analysis","journal":"Diabetes","confidence":"High","confidence_rationale":"Tier 2 / Moderate — loss-of-function in both human stem cells and mouse model with defined differentiation and proliferation phenotypes","pmids":["31519700"],"is_preprint":false},{"year":2020,"finding":"NeuroD1 expression promotes differentiation of medulloblastoma (MB) cells by activating a differentiation program; NeuroD1 expression in MB cells is epigenetically repressed by H3K27me3, and EZH2 inhibition reduces H3K27me3 at the NeuroD1 locus, increasing NeuroD1 expression, promoting MB cell differentiation, and reducing tumor growth.","method":"Single-cell RNA sequencing, NeuroD1 forced expression, EZH2 inhibitor treatment, ChIP (H3K27me3 at NeuroD1 locus), tumor growth assays","journal":"Cell Reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — single-cell transcriptomics plus gain-of-function and epigenetic perturbation with defined phenotypic readout, single lab","pmids":["32579914"],"is_preprint":false}],"current_model":"NEUROD1 is a class II bHLH transcription factor that acts as a pioneer factor and neuronal differentiation determinant: it binds E-box sequences (typically as an E47 heterodimer, as defined by crystal structure) at epigenetically silenced regulatory elements to remodel chromatin from heterochromatin to euchromatin, activating neuronal gene programs while repressing alternative cell fates; its transcriptional activity is regulated by CaMKII phosphorylation (at Ser336), MAPK/ERK-dependent nuclear translocation (via Ser274), interaction with coactivators (BET proteins, Brg1/SWI-SNF, Finb/RREB-1), and upstream regulation by FoxO1-Pml-Sirt1 and Neurogenin3; it also cooperates with transcription factor partners (Tcf12, Insm1/Foxa2, C/EBPs) and is negatively regulated by Id2, INSM1-cyclin D1-HDAC complexes, c-Myc competition, and miR-190; in the pancreas, NEUROD1 is required for beta-cell maturation, perinatal proliferation, and glucose-responsive insulin secretion (including K(ATP) channel function), while in the nervous system it governs neuronal survival, dendritic morphogenesis, cell fate specification in the retina and inner ear, and axon guidance."},"narrative":{"mechanistic_narrative":"NEUROD1 is a class II basic helix-loop-helix transcription factor that functions as a master determinant of neuronal and endocrine differentiation, capable of converting non-neural cells into neurons and driving terminal differentiation programs [PMID:7754368]. It binds E-box sequences as a heterodimer with the ubiquitous bHLH partner E47, a configuration defined by the crystal structure of the E47-NEUROD1 bHLH domain on the insulin promoter E-box, in which NEUROD1 homodimer instability favors heterodimer formation [PMID:18069799]. NEUROD1 acts as a pioneer factor: it directly occupies epigenetically silenced regulatory elements—including bivalent H3K4me3/H3K27me3 chromatin—and reprograms heterochromatin to euchromatin to establish transcriptional competence at neuronal genes, while inducing repressors that erase alternative cell-fate signatures, and these epigenetic changes persist beyond transient NEUROD1 induction [PMID:26516211, PMID:30638745]. Its activity is shaped by partner transcription factors and coactivators, including the SWI/SNF subunit Brg1 required for NEUROD1-driven neuronal differentiation [PMID:15576411], Tcf12 with which it co-occupies target loci to drive cortical neuronal migration [PMID:35147187], the Insm1/Foxa2 combinatorial module governing beta-cell maturity [PMID:25828096], and BET proteins (BRD2/3/4) that act as coactivators in small-cell lung cancer [PMID:36378541]. NEUROD1 transcriptional output is gated post-translationally by CaMKII phosphorylation at Ser336, which stimulates its activity and drives activity-dependent dendritogenesis [PMID:14741104], and by MAPK/ERK-dependent nuclear translocation through Ser274 in response to glucose [PMID:12297313]; it is antagonized by INSM1-cyclin D1-HDAC repressor complexes at its own promoter [PMID:16569215], by Id2 sequestration of E47 [PMID:12526101], and by c-Myc competition for E-box binding [PMID:11799123]. In the pancreas, NEUROD1 is required for islet morphogenesis, endocrine lineage commitment, beta-cell maturation, perinatal proliferation, and glucose-responsive insulin secretion including K(ATP)/SUR1 channel function [PMID:9308961, PMID:20374962, PMID:11981044, PMID:31519700]. In the nervous system it controls retinal and inner-ear cell-fate specification, neuronal survival, dendritic and axonal morphogenesis, and migration [PMID:9834183, PMID:11861467, PMID:20512592, PMID:20661473]. NEUROD1 also drives malignant programs in neuroendocrine cancers, regulating MYC, TrkB, and NCAM in SCLC and the pentose phosphate enzyme G6PD in colorectal cancer [PMID:23553831, PMID:27452466, PMID:34657129].","teleology":[{"year":1995,"claim":"Established NEUROD1 as a neuronal determination factor by showing it is sufficient to drive ectopic neuron formation, defining the central question of how a single bHLH factor commits cells to neuronal fate.","evidence":"Ectopic gain-of-function expression in Xenopus embryos with morphological and molecular readout","pmids":["7754368"],"confidence":"High","gaps":["Did not define the genomic targets or chromatin context underlying the conversion","Did not address endogenous requirement"]},{"year":1997,"claim":"Defined an essential endogenous requirement for NEUROD1 beyond neurons, showing it is needed for beta-cell terminal differentiation and islet morphogenesis, revealing a shared neuroendocrine differentiation role.","evidence":"Knockout mice with histology and immunocytochemistry; corticotroph POMC E-box studies with Co-IP, EMSA, reporter assays","pmids":["9308961","9343431"],"confidence":"High","gaps":["Did not identify the full beta-cell target gene network","Mechanism of maturation versus initial specification not separated"]},{"year":2000,"claim":"Placed NEUROD1 within a transcriptional cascade by showing Neurogenin3 directly activates its promoter through E-boxes, defining upstream regulatory logic of endocrine differentiation.","evidence":"Promoter deletion/mutagenesis, EMSA, reporter assays, and Xenopus ectopic expression","pmids":["10757813","10639171"],"confidence":"High","gaps":["Did not establish whether the cascade operates identically across all endocrine and neural lineages"]},{"year":2002,"claim":"Resolved how NEUROD1 selects targets and is itself modulated, identifying direct activation of SUR1, dual activator/repressor function, c-Myc competition, MAPK-driven nuclear shuttling via Ser274, Id2 antagonism, and Finb/RREB-1 cooperation.","evidence":"EMSA, reporter assays with E-box mutants, dominant-negatives, subcellular fractionation, MEK inhibition, and Co-IP across multiple cell lines","pmids":["11981044","11799123","12297313","12526101","12482979","11861467"],"confidence":"Medium","gaps":["Most regulatory interactions characterized in single labs on episomal reporters","Physiological weighting of each input in vivo unclear"]},{"year":2004,"claim":"Connected NEUROD1 to activity-dependent signaling and chromatin remodeling, showing CaMKII phosphorylation at Ser336 stimulates its activity to drive dendritogenesis and that Brg1/SWI-SNF is required for its transactivation.","evidence":"In vitro kinase assay with site-directed mutagenesis, neuronal knockdown with dendritic morphometry, Co-IP with dominant-negative Brg1 and reporter assays","pmids":["14741104","15576411"],"confidence":"High","gaps":["Did not map genome-wide chromatin remodeling events","Did not resolve how phosphorylation alters DNA binding or cofactor recruitment"]},{"year":2005,"claim":"Linked NEUROD1 expression to metabolic and stress signaling and explored protein-level entry, defining a FoxO1-PML-Sirt1 axis controlling its expression and a heparan-sulfate-dependent transduction route.","evidence":"Co-IP of FoxO1-PML-Sirt1 complex with acetylation mutants and transgenic mice; protein transduction with subcellular imaging and insulin promoter binding","pmids":["16154098","16186386","15906379"],"confidence":"Medium","gaps":["Protein transduction route characterized in single lab without independent confirmation","Physiological relevance of extracellular NEUROD1 entry unclear"]},{"year":2007,"claim":"Provided structural and genomic logic for NEUROD1 DNA recognition, determining the E47-NEUROD1 heterodimer crystal structure on the insulin E-box and mapping neuron-specific target enhancers and cooperating factors.","evidence":"X-ray crystallography of bHLH heterodimer, ChIP and enhancer reporter assays in Xenopus and mouse, C/EBP Co-IP and ChIP","pmids":["18069799","18007592","17254333","17149999"],"confidence":"High","gaps":["Structure limited to bHLH domain on one E-box","Did not define how heterodimer choice is regulated in vivo"]},{"year":2010,"claim":"Defined NEUROD1's role in functional cell maturation and circuit-level outcomes, showing it is required for glucose-responsive beta-cell maturation, spiral/vestibular neuron survival and axon guidance, hair-cell fate suppression, and opioid-regulated spine stability.","evidence":"Conditional knockouts with glucose/insulin assays and metabolic profiling; ear conditional knockouts with anatomical tracing; CaMKII/miR-190 manipulation with spine morphometry","pmids":["20374962","20512592","20661473","20554861","18199774"],"confidence":"High","gaps":["Direct target genes mediating each maturation/survival phenotype only partially defined","Tissue-specific cofactor requirements not fully resolved"]},{"year":2015,"claim":"Established NEUROD1 as a pioneer factor that reprograms silenced chromatin to euchromatin with epigenetic memory, and defined a combinatorial Insm1/Neurod1/Foxa2 module governing beta-cell maturity.","evidence":"ChIP-seq, ATAC-seq, RNA-seq with conditional induction in progenitors; Co-IP and ChIP-seq co-occupancy with conditional Insm1 ablation; zebrafish Notch epistasis","pmids":["26516211","25828096","26580854"],"confidence":"High","gaps":["Molecular basis of pioneer access to closed chromatin not fully resolved","Chromatin remodeling cofactors recruited to silenced loci not exhaustively defined"]},{"year":2016,"claim":"Defined NEUROD1's oncogenic transcriptional program in neuroendocrine cancer, showing it occupies distinct loci from ASCL1, targets MYC, and promotes SCLC malignant behavior, TrkB/NCAM signaling, and G6PD-driven metabolism.","evidence":"ChIP-seq comparison with ASCL1, CRISPR/siRNA knockdown, SCLC mouse and xenograft models, metabolic flux analysis","pmids":["27452466","23553831","34657129"],"confidence":"High","gaps":["Did not establish whether oncogenic targets overlap developmental targets","Mechanism of NEUROD1-vs-ASCL1 subtype divergence unclear"]},{"year":2017,"claim":"Revealed a non-canonical role as a DNA-binding-dependent coactivator conferring nuclear receptor selectivity, with NeuroD factors marking mineralocorticoid- but not glucocorticoid-receptor binding sites.","evidence":"MR/GR ChIP-seq, de novo motif and co-occupancy analysis, reporter assays in HEK293","pmids":["28324065"],"confidence":"Medium","gaps":["Physiological consequence of MR coactivation in vivo not established","Whether NEUROD1 itself (versus NeuroD2) mediates this in target tissues unclear"]},{"year":2019,"claim":"Extended the pioneer-factor model to cell reprogramming and tumor differentiation, showing NEUROD1 occupies bivalent chromatin in microglia and that its epigenetic repression in medulloblastoma can be relieved to force differentiation.","evidence":"ChIP-seq for H3K4me3/H3K27me3, ATAC-seq, lentiviral expression; scRNA-seq with EZH2 inhibition and H3K27me3 ChIP","pmids":["30638745","32579914"],"confidence":"Medium","gaps":["Microglia-to-neuron conversion claim later contested","Direct versus indirect chromatin effects not fully separated"]},{"year":2021,"claim":"Refined developmental and reprogramming roles, demonstrating NEUROD1 requirement for human and mouse endocrine differentiation and perinatal islet proliferation, while lineage tracing refuted prior microglia-to-neuron conversion as artifactual.","evidence":"NEUROD1 inactivation in human ESCs and mouse conditional knockouts with transcriptome/H3K27me3 profiling; strict Cre-lox lineage tracing with cell-death assays","pmids":["31519700","34201511","34875233"],"confidence":"High","gaps":["Reconciliation of pioneer activity with failure to reprogram microglia not mechanistically resolved","Boundaries of NEUROD1 reprogramming competence across cell types undefined"]},{"year":2023,"claim":"Consolidated NEUROD1 as a maintainer of a permissive endocrine chromatin landscape and a cooperating driver of cortical migration with Tcf12, linking its pioneer activity to lineage stability and morphogenesis.","evidence":"Conditional knockout with transcriptome and H3K27me3 ChIP-seq/ATAC-seq; Co-IP and co-occupancy ChIP-seq with in vivo cortical migration assays; BET protein Co-IP, ChIP-seq, xenograft","pmids":["37689751","35147187","36378541"],"confidence":"High","gaps":["How NEUROD1 partner choice (Tcf12, Insm1/Foxa2, BET, E47) is determined in each tissue remains unresolved","Direct chromatin-modifying enzymes recruited by NEUROD1 not fully identified"]},{"year":null,"claim":"How NEUROD1 selects its pioneer target loci, recruits chromatin remodelers, and switches between distinct cofactor partnerships across neural, endocrine, and oncogenic contexts remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No structural model of NEUROD1 engaging nucleosomal/closed chromatin","Mechanism coupling post-translational modification to target selection unknown","Determinants of tissue-specific partner choice undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[0,2,11,13,29,33]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[13,16,23,39]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[13,20,29]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[20]}],"pathway":[{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[2,13,29,33]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,3,6,26,27,36]},{"term_id":"R-HSA-4839726","term_label":"Chromatin organization","supporting_discovery_ids":[29,33,37]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[28,31,39,42]}],"complexes":["E47-NEUROD1 bHLH heterodimer","Insm1-Neurod1-Foxa2 complex","INSM1-cyclin D1-HDAC1/3 repressor complex (at NeuroD1 promoter)"],"partners":["TCF3 (E47)","SMARCA4 (BRG1)","TCF12","INSM1","FOXA2","BRD4","CEBPA","RREB1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q13562","full_name":"Neurogenic differentiation factor 1","aliases":["Class A basic helix-loop-helix protein 3","bHLHa3"],"length_aa":356,"mass_kda":39.9,"function":"Acts as a transcriptional activator: mediates transcriptional activation by binding to E box-containing promoter consensus core sequences 5'-CANNTG-3'. Associates with the p300/CBP transcription coactivator complex to stimulate transcription of the secretin gene as well as the gene encoding the cyclin-dependent kinase inhibitor CDKN1A. Contributes to the regulation of several cell differentiation pathways, like those that promote the formation of early retinal ganglion cells, inner ear sensory neurons, granule cells forming either the cerebellum or the dentate gyrus cell layer of the hippocampus, endocrine islet cells of the pancreas and enteroendocrine cells of the small intestine. Together with PAX6 or SIX3, is required for the regulation of amacrine cell fate specification. Also required for dendrite morphogenesis and maintenance in the cerebellar cortex. Associates with chromatin to enhancer regulatory elements in genes encoding key transcriptional regulators of neurogenesis (By similarity)","subcellular_location":"Cytoplasm; Nucleus","url":"https://www.uniprot.org/uniprotkb/Q13562/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/NEUROD1","classification":"Not Classified","n_dependent_lines":12,"n_total_lines":1208,"dependency_fraction":0.009933774834437087},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/NEUROD1","total_profiled":1310},"omim":[{"mim_id":"620491","title":"MATURIN, NEURAL PROGENITOR DIFFERENTIATION REGULATOR HOMOLOG; MTURN","url":"https://www.omim.org/entry/620491"},{"mim_id":"617285","title":"HIGH MOBILITY GROUP BOX 4; HMGB4","url":"https://www.omim.org/entry/617285"},{"mim_id":"616511","title":"MATURITY-ONSET DIABETES OF THE YOUNG, TYPE 14; MODY14","url":"https://www.omim.org/entry/616511"},{"mim_id":"614027","title":"INSULINOMA-ASSOCIATED 2; INSM2","url":"https://www.omim.org/entry/614027"},{"mim_id":"613084","title":"MYELIN TRANSCRIPTION FACTOR 1-LIKE; MYT1L","url":"https://www.omim.org/entry/613084"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"","locations":[],"tissue_specificity":"Group enriched","tissue_distribution":"Detected in some","driving_tissues":[{"tissue":"brain","ntpm":166.9},{"tissue":"retina","ntpm":131.5}],"url":"https://www.proteinatlas.org/search/NEUROD1"},"hgnc":{"alias_symbol":["BETA2","BHF-1","NeuroD","bHLHa3","MODY6"],"prev_symbol":["NEUROD"]},"alphafold":{"accession":"Q13562","domains":[],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q13562","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q13562-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q13562-F1-predicted_aligned_error_v6.png","plddt_mean":62.09},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=NEUROD1","jax_strain_url":"https://www.jax.org/strain/search?query=NEUROD1"},"sequence":{"accession":"Q13562","fasta_url":"https://rest.uniprot.org/uniprotkb/Q13562.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q13562/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q13562"}},"corpus_meta":[{"pmid":"7754368","id":"PMC_7754368","title":"Conversion of Xenopus ectoderm 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knockout mice develop severe diabetes with striking reduction in beta cell number and failure to form mature islets, and also fail to develop secretin- and cholecystokinin-producing enteroendocrine cells.\",\n      \"method\": \"Gene targeting / knockout mice, histology, immunocytochemistry\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean loss-of-function knockout with defined cellular and physiological phenotype, widely replicated\",\n      \"pmids\": [\"9308961\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1997,\n      \"finding\": \"NeuroD1/beta2 is expressed in corticotroph cells of the pituitary and forms heterodimeric complexes (CUTE complexes) with ubiquitous bHLH dimerization partners that specifically bind and activate transcription from the POMC promoter E-box; NeuroD1 heterodimers activate transcription in synergy with the homeodomain protein Ptx1.\",\n      \"method\": \"Co-immunoprecipitation, EMSA, reporter gene transactivation assays, in situ hybridization\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP, EMSA, and functional reporter assays in single lab with multiple orthogonal methods\",\n      \"pmids\": [\"9343431\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"NeuroD plays multiple roles in developing rodent retina: it acts as a critical regulator of neuron versus glial cell fate (NeuroD-null retinas show 3-4 fold increase in Müller glia), promotes amacrine over bipolar interneuron differentiation, and is essential for survival of a subset of rod photoreceptors.\",\n      \"method\": \"Loss-of-function (NeuroD-null mice retinal explants), gain-of-function (retroviral forced expression in rat), cell counting and marker analysis\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — complementary loss- and gain-of-function with defined cellular phenotypes, multiple orthogonal methods\",\n      \"pmids\": [\"9834183\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"BETA2/NeuroD is required for proliferation of dentate granule cell precursors after migration and for their differentiation; loss of BETA2/NeuroD results in failure to develop a dentate gyrus granule cell layer and causes spontaneous limbic seizures.\",\n      \"method\": \"BETA2/NeuroD null mice, immunocytochemistry, electrophysiology\",\n      \"journal\": \"PNAS\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean knockout with defined cellular (proliferation/differentiation defect) and functional (seizure) phenotype\",\n      \"pmids\": [\"10639171\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Neurogenin 3 (ngn3) acts upstream of BETA2/NeuroD and directly activates the BETA2 promoter through two proximal E-box sequences (E1 and E3) by binding as an ngn3-E47 heterodimer, placing BETA2/NeuroD downstream of ngn3 in the pancreatic endocrine differentiation cascade.\",\n      \"method\": \"Ectopic expression in Xenopus, promoter deletion/mutation analysis, EMSA, reporter gene assays in endocrine cell lines\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro promoter reconstitution with mutagenesis and in vivo ectopic expression, multiple methods in one study\",\n      \"pmids\": [\"10757813\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Math3 and NeuroD are functionally redundant for amacrine cell fate specification in the retina; in Math3-NeuroD double-mutant retina, amacrine cells are completely absent and cells that would become amacrine cells adopt ganglion and glial fates instead. Co-expression of Math3 or NeuroD with homeodomain proteins Pax6 or Six3 is required to specify amacrine cell fate.\",\n      \"method\": \"Double-knockout mice, retinal explant cultures, misexpression experiments\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic epistasis via double knockout with clear cell fate shift phenotype, complementary misexpression\",\n      \"pmids\": [\"11861467\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"CaMKII phosphorylates NeuroD at distinct sites including Ser336 in primary neurons, and this phosphorylation stimulates NeuroD transcriptional activity and dendritic growth; genetic knockdown of NeuroD in cerebellar granule neurons impairs dendritic generation and maintenance while sparing axonal development, defining a CaMKII-NeuroD signaling pathway for activity-dependent dendritogenesis.\",\n      \"method\": \"Genetic knockdown in primary neurons and organotypic cerebellar slices, in vitro kinase assay, site-directed mutagenesis, dendritic morphometry\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — in vitro kinase assay with mutagenesis plus loss-of-function with defined morphological phenotype, multiple orthogonal methods\",\n      \"pmids\": [\"14741104\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"The SWI/SNF catalytic subunit Brg1 physically associates with NeuroD and is essential for NeuroD-mediated transactivation; loss of Brg1 function abolishes the ability of NeuroD to drive neuronal differentiation in Xenopus and mammalian P19 cells.\",\n      \"method\": \"Co-immunoprecipitation (Brg1-NeuroD physical interaction), dominant-negative Brg1, reporter gene transactivation assays, gain/loss-of-function in Xenopus and P19 cells\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP plus functional reporter assays and phenotypic rescue, multiple methods\",\n      \"pmids\": [\"15576411\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"FoxO1 forms a complex with PML and Sirt1 to activate NeuroD (and MafA) expression, protecting beta cells against oxidative stress; acetylation of FoxO1 targets it to PML and prevents its ubiquitin-dependent degradation, linking glucose/growth factor signaling to NeuroD expression.\",\n      \"method\": \"Co-immunoprecipitation (FoxO1-Pml-Sirt1 complex), acetylation-defective and acetylation-mimicking mutants, transgenic mouse model, reporter assays\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP of complex plus mutagenesis of post-translational modification sites and in vivo mouse validation\",\n      \"pmids\": [\"16154098\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"BETA2/NeuroD protein contains an arginine- and lysine-rich protein transduction domain (PTD) that allows it to permeate cells via macropinocytosis; once internalized it is released from endosomes to the cytoplasm and nucleus, where it binds the insulin promoter and activates insulin gene expression.\",\n      \"method\": \"Protein transduction experiments, subcellular fractionation/imaging, insulin promoter binding assay, dose-response analysis\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — single lab with functional readout, but mechanism of PTD-mediated entry characterized by pharmacological inhibition and imaging\",\n      \"pmids\": [\"16186386\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"NeuroD1 acts as both a transcriptional activator (of insulin and IAPP) and a transcriptional repressor (of somatostatin) in the same cell; ectopic NeuroD1 in a delta-cell line represses somatostatin and induces beta-cell genes including Nkx2.2, demonstrating dual activator/repressor function.\",\n      \"method\": \"Ectopic expression in pancreatic delta-cell line (TRM-6/PDX-1), reporter gene assays with insulin and somatostatin promoters, immunostaining\",\n      \"journal\": \"Developmental dynamics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — single lab, functional reporter assays with defined promoters plus cell-type-specific expression analysis\",\n      \"pmids\": [\"15906379\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"INSM1 binds to the neuroD/beta2 promoter and represses its transcription by recruiting cyclin D1 and histone deacetylases HDAC-1 and HDAC-3; cyclin D1 mediates the interaction between INSM1 and HDACs, and overexpression of cyclin D1 plus HDAC-3 enhances INSM1-mediated repression.\",\n      \"method\": \"Yeast two-hybrid, in vitro and in vivo pull-down assays, co-immunoprecipitation, ChIP, reporter gene transactivation assays\",\n      \"journal\": \"Biochemical journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple orthogonal methods (Y2H, pulldown, co-IP, ChIP, reporter) in single lab establishing the transcriptional repression complex\",\n      \"pmids\": [\"16569215\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Crystal structure of the E47-NeuroD1 bHLH domain heterodimer in complex with the insulin promoter E-box (CATCTG) was determined; E47 and NeuroD1 interactions in the heterodimer are comparable to E47 homodimer interactions, suggesting NeuroD1 homodimer instability drives heterodimer preference. NeuroD1 neurogenic-specific residue His115 makes an additional phosphate backbone contact that orients the heterodimer uniquely on the E-box.\",\n      \"method\": \"X-ray crystallography, protein purification, structural analysis\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — crystal structure determination with structure-function interpretation, single lab\",\n      \"pmids\": [\"18069799\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"NeuroD and Neurogenin bind distinct consensus E-box sequences and regulate largely overlapping yet distinct sets of neuronal differentiation genes; they act through enhancers containing clustered, conserved consensus-binding sites to activate transcription factors, signal transducers, and cytoskeletal regulators for neuronal differentiation and migration.\",\n      \"method\": \"Target gene identification by expression profiling in Xenopus and mouse, ChIP, enhancer reporter assays in Xenopus, computational motif analysis\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus functional reporter assays and cross-species conservation, multiple methods\",\n      \"pmids\": [\"18007592\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"C/EBPalpha/beta and NeuroD form complexes in vitro and in vivo and are co-recruited to the promoters of immediate-early genes Fos, Egr1, and Egr2 in response to BDNF/TrkB signaling; C/EBPalpha and NeuroD cooperatively activate the Fos promoter via a combined C/EBP-Ebox element.\",\n      \"method\": \"Co-immunoprecipitation (in vitro and in vivo), ChIP, reporter gene transactivation, genetic depletion of Trk receptors\",\n      \"journal\": \"Neural development\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP plus ChIP and functional reporter assay, single lab, multiple methods\",\n      \"pmids\": [\"17254333\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"BETA2/NeuroD activates the mouse sulfonylurea receptor 1 (SUR1) gene through a specific E-box element (E3 at -141) in cooperation with E47; a dominant-negative BETA2/NeuroD represses SUR1 promoter activity, and mutation of E3 eliminates BETA2/NeuroD stimulation, establishing direct transcriptional regulation of SUR1 by BETA2/NeuroD.\",\n      \"method\": \"Reporter gene assays, EMSA, dominant-negative constructs, promoter deletion/mutation analysis\",\n      \"journal\": \"Molecular endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — EMSA plus reporter assays with mutagenesis and dominant-negative in multiple cell lines, single lab\",\n      \"pmids\": [\"11981044\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"c-Myc suppresses insulin gene transcription by competing with NeuroD/BETA2 for binding to the E-box element in the insulin promoter; c-Myc does not activate insulin gene expression and lacks a coactivator interaction with p300 (which is a NeuroD coactivator), providing the mechanism for c-Myc-mediated inhibition of NeuroD function.\",\n      \"method\": \"Gel-shift (EMSA), reporter gene assays with E-box mutant promoters, co-expression in multiple cell lines including primary islets, adenoviral overexpression\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — EMSA plus reporter assays with mutagenesis and adenoviral overexpression, multiple cell types, single lab\",\n      \"pmids\": [\"11799123\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"BETA2/NeuroD activates transcription of the secretin gene through E-box binding; the zinc finger protein Finb/RREB-1 physically associates with BETA2 and potentiates its transcriptional activation of the secretin gene by DNA binding to an adjacent cis-element, requiring both DNA binding and physical interaction with BETA2.\",\n      \"method\": \"Expression cloning, co-immunoprecipitation, reporter gene assays, promoter mutation analysis\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — expression cloning plus co-IP and functional reporter with mutagenesis, single lab\",\n      \"pmids\": [\"12482979\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Id2 inhibits BETA2/NeuroD function by interacting with E47 (the bHLH dimerization partner) and blocking BETA2/NeuroD binding to its E-box target sequence, thereby inhibiting E-box-mediated gene expression in a dose-dependent manner.\",\n      \"method\": \"Yeast two-hybrid, EMSA, reporter gene assays, co-expression in HIT and HeLa cells\",\n      \"journal\": \"Experimental & molecular medicine\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — EMSA plus reporter assays, single lab, mechanism via E47 interaction\",\n      \"pmids\": [\"12526101\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2002,\n      \"finding\": \"Glucose stimulation of the MEK-ERK (MAPK) signaling pathway promotes NeuroD1 nuclear localization in MIN6 beta-cells; at low glucose NeuroD1 is predominantly cytoplasmic, and at high glucose it translocates to the nucleus. Mutation of the MAPK phosphorylation site S274A or MEK inhibition increases cytoplasmic NeuroD1 at high glucose and attenuates NeuroD1-mediated transcription.\",\n      \"method\": \"Subcellular fractionation/immunofluorescence, MEK inhibitor (PD98059), site-directed mutagenesis (S274A), reporter gene assay\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — subcellular localization with pharmacological and mutagenesis validation plus functional reporter, single lab\",\n      \"pmids\": [\"12297313\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Huntingtin (Htt) interacts with NeuroD (ND) indirectly via huntingtin-associated protein 1 (HAP1), and mixed-lineage kinase 2 (MLK2) phosphorylates and stimulates NeuroD activity; Htt and HAP1 facilitate MLK2-mediated activation of NeuroD, identifying NeuroD as the first neuron-specific transcription factor whose activity is modulated by Htt.\",\n      \"method\": \"Yeast two-hybrid screen, co-immunoprecipitation, kinase assay, reporter gene transactivation assays\",\n      \"journal\": \"PNAS\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Y2H plus co-IP and in vitro kinase assay with reporter assays, multiple methods in single lab\",\n      \"pmids\": [\"12881483\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Cell surface heparan sulfate proteoglycans are required for BETA2/NeuroD protein internalization; soluble heparin and heparinase III treatment impair NeuroD entry, while chondroitin sulfate and chondroitinase are ineffective; mutant CHO cell lines deficient in GAG biosynthesis confirm that selective sulfation of heparan sulfate is important for NeuroD-heparan sulfate recognition.\",\n      \"method\": \"Competitive inhibition with soluble GAGs, enzymatic treatment (heparinase III, chondroitinase), GAG-biosynthesis-deficient CHO mutant cell lines\",\n      \"journal\": \"Human gene therapy\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple genetic and biochemical approaches establishing receptor requirement, single lab\",\n      \"pmids\": [\"17149999\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"NeuroD1 is required for sustained expression of thyroid hormone receptor beta2 (TRbeta2) in immature cone photoreceptors; NeuroD1-deficient mice display an opsin phenotype identical to TRbeta2-deficient mice (uniform S-opsin, loss of M-opsin), and NeuroD1 directly binds an E-box in the TRbeta2 intron control region. Reintroduction of NeuroD1 into NeuroD1-null retinal explants restores TRbeta2 expression.\",\n      \"method\": \"NeuroD1 knockout mice, ChIP (E-box binding), retinal explant rescue experiment, opsin immunostaining\",\n      \"journal\": \"Journal of Neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function with defined molecular phenotype (TRbeta2 loss), ChIP, and rescue experiment, multiple methods\",\n      \"pmids\": [\"18199774\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"NeuroD activity is regulated downstream of mu-opioid receptor agonists via CaMKIIalpha-dependent phosphorylation: morphine reduces CaMKIIalpha activity and thus net NeuroD activity, while fentanyl maintains NeuroD activity by also increasing NeuroD protein level through suppression of miR-190. Decreased NeuroD activity leads to reduced dendritic spine stability, which can be rescued by NeuroD overexpression.\",\n      \"method\": \"CaMKII activity assays, miR-190 overexpression, KN93 inhibitor, NeuroD overexpression rescue, dendritic spine morphometry, downstream target gene mRNA measurement\",\n      \"journal\": \"Journal of Neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological and genetic manipulation with functional spine stability readout, multiple methods, single lab\",\n      \"pmids\": [\"20554861\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"NeuroD is required for beta cell maturation and functional glucose responsiveness; conditional deletion of neuroD in insulin-expressing cells results in severe glucose intolerance, poor glucose-stimulated insulin secretion, a metabolic profile resembling immature beta cells (elevated glycolytic genes, LDHA, elevated basal insulin secretion), defective K(ATP) channel-mediated insulin secretion, and near-complete loss of ins1 expression.\",\n      \"method\": \"Conditional knockout mice (insulin-Cre), glucose tolerance tests, insulin secretion assays, gene expression analysis, metabolic profiling\",\n      \"journal\": \"Cell metabolism\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — conditional knockout with multiple defined functional phenotypes, replicated across methods\",\n      \"pmids\": [\"20374962\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Neurod1 is essential for survival of most spiral and vestibular neurons; conditional deletion in the ear results in vestibular and cochlear afferents projecting centrally as a single mixed nerve (rather than segregated), disorganized peripheral innervation with collaterals to multiple endorgans, and loss of tonotopic organization.\",\n      \"method\": \"Conditional knockout (Pax2-Cre), anatomical tracing, immunofluorescence, comparison with systemic null mice\",\n      \"journal\": \"Cell and tissue research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional knockout with defined axon guidance and survival phenotype using anatomical methods\",\n      \"pmids\": [\"20512592\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"Neurod1 suppresses hair cell differentiation in inner ear sensory ganglia; conditional deletion of Neurod1 in the ear results in Atoh1 expression and hair cell differentiation within the ganglion. Neurod1 also regulates hair cell subtype differentiation in the cochlea, with conditional null mice showing premature gene expression changes in the cochlear apex and transformation of outer hair cells into inner hair cells.\",\n      \"method\": \"Conditional knockout (Pax2-Cre), immunofluorescence, in situ hybridization, gene expression analysis\",\n      \"journal\": \"PLoS One\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional knockout with defined cell fate and subtype specification phenotypes, multiple markers\",\n      \"pmids\": [\"20661473\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"NeuroD1 promotes survival and migration in neuroendocrine lung carcinomas by regulating expression of the receptor tyrosine kinase TrkB and the prometastatic signaling molecule NCAM as downstream target genes.\",\n      \"method\": \"NeuroD1 knockdown/loss-of-function in SCLC cell lines, gene expression analysis, functional migration and survival assays\",\n      \"journal\": \"PNAS\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — loss-of-function with defined downstream targets and migration/survival phenotype, single lab\",\n      \"pmids\": [\"23553831\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"NeuroD1 acts as a pioneer transcription factor that directly binds epigenetically silenced regulatory elements of neuronal genes, reprogramming heterochromatin to euchromatin and remodeling the transcription factor landscape to establish transcriptional competence; NeuroD1 also induces epithelial-to-mesenchymal transition genes to promote neuronal migration. These epigenetic changes are maintained beyond the transient NeuroD1 induction (epigenetic memory).\",\n      \"method\": \"ChIP-seq, ATAC-seq, RNA-seq, chromatin accessibility assays, conditional NeuroD1 induction system in neural progenitors\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — genome-wide ChIP-seq plus chromatin accessibility and transcriptome analysis with multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"26516211\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Insm1, Neurod1, and Foxa2 directly interact with each other and together co-occupy regulatory sequences in the genome of mature pancreatic beta-cells; combinatorial binding of Insm1/Neurod1/Foxa2 (not Insm1 alone) explains a significant fraction of gene expression changes controlling beta-cell maturity.\",\n      \"method\": \"Co-immunoprecipitation (direct interaction of Insm1, Neurod1, Foxa2), ChIP-seq (co-occupancy), conditional Insm1 ablation in adult beta-cells, gene expression analysis\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus ChIP-seq co-occupancy and conditional knockout, multiple orthogonal methods\",\n      \"pmids\": [\"25828096\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"NEUROD1 binds distinct genomic loci from ASCL1 in SCLC cells, regulates a mostly distinct set of genes, and targets the oncogene MYC; NEUROD1 is not required for mouse SCLC tumor formation (unlike ASCL1) but promotes malignant survival behavior in human SCLC cell lines.\",\n      \"method\": \"ChIP-seq (NEUROD1 vs ASCL1 genomic binding), gene expression analysis, CRISPR/siRNA knockdown, SCLC mouse models\",\n      \"journal\": \"Cell Reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP-seq with functional loss-of-function and mouse model, multiple orthogonal methods\",\n      \"pmids\": [\"27452466\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"NeuroD factors (Neurod1, Neurod2, Neurod6) act as DNA-binding-dependent coactivators for the mineralocorticoid receptor (MR) but not glucocorticoid receptor (GR) in the hippocampus by binding an Atoh/NeuroD consensus sequence adjacent to MR-specific GREs; Neurod2 is detected at hippocampal MR binding sites but not GR-exclusive sites, providing a mechanism for MR vs GR DNA-binding selectivity.\",\n      \"method\": \"ChIP-seq (MR, GR), de novo motif analysis, co-occupancy analysis, reporter gene assays in HEK293 cells\",\n      \"journal\": \"Endocrinology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP-seq plus functional reporter assays, single lab, but findings are genome-wide with functional validation\",\n      \"pmids\": [\"28324065\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"NeuroD1 functions as a pioneer transcription factor in microglia-to-neuron reprogramming by initially occupying closed chromatin regions marked by bivalent H3K4me3/H3K27me3 in microglia; these regions are subsequently resolved to monovalent H3K4me3 as neuronal identity is established. NeuroD1 also induces transcriptional repressors Scrt1 and Meis2 to decrease microglial gene expression, while erasing the microglial epigenetic signature.\",\n      \"method\": \"ChIP-seq (H3K4me3, H3K27me3), ATAC-seq, RNA-seq, lentiviral NeuroD1 expression in microglia in vitro and in vivo\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — genome-wide epigenome and transcriptome profiling with multiple orthogonal methods in single rigorous study\",\n      \"pmids\": [\"30638745\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"NeuroD1 expression induces apoptosis in microglia rather than converting them to neurons; lineage tracing revealed non-specific leakage of lentiviruses previously used in microglia-to-neuron conversion experiments, indicating that prior reports of NeuroD1-mediated microglia-to-neuron cross-lineage reprogramming were artifactual.\",\n      \"method\": \"Lineage tracing with strict Cre-lox reporter, live imaging, conditional NeuroD1 expression in microglia, cell death assays\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — rigorous lineage tracing plus cell death assays refuting a prior claim, single lab contradicting PMID 30638745\",\n      \"pmids\": [\"34875233\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"NEUROD1 is required for early alpha and beta endocrine cell differentiation during mouse pancreas development; Neurod1 inactivation impairs expression of key transcription factors for alpha- and beta-cell differentiation, beta-cell proliferation, and insulin production, altering H3K27me3 histone modification patterns in promoter regions of differentially expressed genes.\",\n      \"method\": \"Conditional knockout mice, transcriptome analysis, chromatin landscape (H3K27me3 ChIP), immunofluorescence\",\n      \"journal\": \"International Journal of Molecular Sciences\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional knockout with transcriptome and epigenome analysis, multiple orthogonal methods\",\n      \"pmids\": [\"34201511\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"NeuroD1 cooperates with Tcf12 to drive neuronal migration during cortical development; Tcf12 forms a physical complex with NeuroD1, co-occupies a subset of NeuroD1 target loci, and their cooperation activates chromatin and target genes required for cell migration. In vivo manipulation demonstrates Tcf12 is essential for correct migration of newborn neurons and cortical lamination.\",\n      \"method\": \"Co-immunoprecipitation (Tcf12-NeuroD1 complex), ChIP-seq (co-occupancy), ATAC-seq, conditional in vivo manipulation, cortical migration assays\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP, co-occupancy ChIP-seq, and in vivo functional validation, multiple orthogonal methods\",\n      \"pmids\": [\"35147187\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"NEUROD1 reinforces endocrine lineage commitment and differentiation in the developing pancreas by maintaining a chromatin landscape permissive for endocrine gene expression; Neurod1 inactivation triggers downregulation of endocrine differentiation transcription factors and upregulation of non-endocrine genes, altering H3K27me3 modification patterns in promoter regions of affected genes.\",\n      \"method\": \"Conditional knockout, transcriptome sequencing, chromatin landscape analysis (H3K27me3 ChIP-seq), ATAC-seq\",\n      \"journal\": \"Nature Communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — conditional knockout with genome-wide transcriptome and epigenome profiling, multiple orthogonal methods\",\n      \"pmids\": [\"37689751\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"BET proteins (BRD2/3/4) physically interact with NEUROD1 and function as its transcriptional coactivators in SCLC; NEUROD1 plays a critical role in defining BET protein genomic occupancy landscapes in SCLC, and BET inhibition broadly suppresses NEUROD1-target genes (especially superenhancer-associated), inhibiting SCLC growth in vitro and in vivo.\",\n      \"method\": \"Co-immunoprecipitation (NEUROD1-BET interaction), CRISPR knockout, ChIP-seq, SCLC xenograft in vivo experiments\",\n      \"journal\": \"Molecular cancer research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — co-IP plus ChIP-seq and in vivo validation with CRISPR knockout, multiple methods\",\n      \"pmids\": [\"36378541\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"NeuroD1 directly binds the G6PD promoter to activate G6PD transcription, stimulating the pentose phosphate pathway in colorectal cancer cells to enhance nucleotide and NADPH production, reduce ROS, and promote DNA/lipid biosynthesis and tumor cell proliferation.\",\n      \"method\": \"ChIP (NeuroD1 binding to G6PD promoter), reporter gene assays, metabolic flux analysis, knockdown/overexpression with proliferation and tumorigenic readouts\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus reporter assays and functional metabolic/proliferation readouts, single lab\",\n      \"pmids\": [\"34657129\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"In zebrafish, NeuroD governs photoreceptor genesis via non-cell-autonomous mechanisms and functions through Notch signaling: NeuroD knockdown increases Notch pathway gene expression, and Notch inhibition rescues the cell cycle exit defect (but not photoreceptor maturation) caused by NeuroD knockdown. During adult photoreceptor regeneration, NeuroD knockdown prevents cell cycle exit and regeneration, and Notch inhibition rescues this phenotype.\",\n      \"method\": \"Genetic mosaic analysis, morpholino knockdown, CRISPR/Cas9 mutation, pharmacologic Notch inhibition, transgenic Notch activation, in situ hybridization, qRT-PCR\",\n      \"journal\": \"Investigative ophthalmology & visual science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple complementary genetic and pharmacological approaches establishing pathway epistasis, rigorous experimental design\",\n      \"pmids\": [\"26580854\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"NEUROD1 is required for differentiation of human embryonic stem cells (HESCs) into insulin-expressing beta cells; inactivation of NEUROD1 in HESCs severely impairs differentiation from pancreatic progenitors and prevents full activation of the beta-cell transcription factor network. In mice, Neurod1 is required for perinatal proliferation of alpha- and beta-cells.\",\n      \"method\": \"NEUROD1 inactivation in HESCs, mouse conditional knockout, flow cytometry, gene expression analysis\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — loss-of-function in both human stem cells and mouse model with defined differentiation and proliferation phenotypes\",\n      \"pmids\": [\"31519700\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"NeuroD1 expression promotes differentiation of medulloblastoma (MB) cells by activating a differentiation program; NeuroD1 expression in MB cells is epigenetically repressed by H3K27me3, and EZH2 inhibition reduces H3K27me3 at the NeuroD1 locus, increasing NeuroD1 expression, promoting MB cell differentiation, and reducing tumor growth.\",\n      \"method\": \"Single-cell RNA sequencing, NeuroD1 forced expression, EZH2 inhibitor treatment, ChIP (H3K27me3 at NeuroD1 locus), tumor growth assays\",\n      \"journal\": \"Cell Reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — single-cell transcriptomics plus gain-of-function and epigenetic perturbation with defined phenotypic readout, single lab\",\n      \"pmids\": [\"32579914\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"NEUROD1 is a class II bHLH transcription factor that acts as a pioneer factor and neuronal differentiation determinant: it binds E-box sequences (typically as an E47 heterodimer, as defined by crystal structure) at epigenetically silenced regulatory elements to remodel chromatin from heterochromatin to euchromatin, activating neuronal gene programs while repressing alternative cell fates; its transcriptional activity is regulated by CaMKII phosphorylation (at Ser336), MAPK/ERK-dependent nuclear translocation (via Ser274), interaction with coactivators (BET proteins, Brg1/SWI-SNF, Finb/RREB-1), and upstream regulation by FoxO1-Pml-Sirt1 and Neurogenin3; it also cooperates with transcription factor partners (Tcf12, Insm1/Foxa2, C/EBPs) and is negatively regulated by Id2, INSM1-cyclin D1-HDAC complexes, c-Myc competition, and miR-190; in the pancreas, NEUROD1 is required for beta-cell maturation, perinatal proliferation, and glucose-responsive insulin secretion (including K(ATP) channel function), while in the nervous system it governs neuronal survival, dendritic morphogenesis, cell fate specification in the retina and inner ear, and axon guidance.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"NEUROD1 is a class II basic helix-loop-helix transcription factor that functions as a master determinant of neuronal and endocrine differentiation, capable of converting non-neural cells into neurons and driving terminal differentiation programs [#0]. It binds E-box sequences as a heterodimer with the ubiquitous bHLH partner E47, a configuration defined by the crystal structure of the E47-NEUROD1 bHLH domain on the insulin promoter E-box, in which NEUROD1 homodimer instability favors heterodimer formation [#13]. NEUROD1 acts as a pioneer factor: it directly occupies epigenetically silenced regulatory elements—including bivalent H3K4me3/H3K27me3 chromatin—and reprograms heterochromatin to euchromatin to establish transcriptional competence at neuronal genes, while inducing repressors that erase alternative cell-fate signatures, and these epigenetic changes persist beyond transient NEUROD1 induction [#29, #33]. Its activity is shaped by partner transcription factors and coactivators, including the SWI/SNF subunit Brg1 required for NEUROD1-driven neuronal differentiation [#8], Tcf12 with which it co-occupies target loci to drive cortical neuronal migration [#36], the Insm1/Foxa2 combinatorial module governing beta-cell maturity [#30], and BET proteins (BRD2/3/4) that act as coactivators in small-cell lung cancer [#38]. NEUROD1 transcriptional output is gated post-translationally by CaMKII phosphorylation at Ser336, which stimulates its activity and drives activity-dependent dendritogenesis [#7], and by MAPK/ERK-dependent nuclear translocation through Ser274 in response to glucose [#20]; it is antagonized by INSM1-cyclin D1-HDAC repressor complexes at its own promoter [#12], by Id2 sequestration of E47 [#19], and by c-Myc competition for E-box binding [#17]. In the pancreas, NEUROD1 is required for islet morphogenesis, endocrine lineage commitment, beta-cell maturation, perinatal proliferation, and glucose-responsive insulin secretion including K(ATP)/SUR1 channel function [#1, #25, #16, #41]. In the nervous system it controls retinal and inner-ear cell-fate specification, neuronal survival, dendritic and axonal morphogenesis, and migration [#3, #6, #26, #27]. NEUROD1 also drives malignant programs in neuroendocrine cancers, regulating MYC, TrkB, and NCAM in SCLC and the pentose phosphate enzyme G6PD in colorectal cancer [#28, #31, #39].\",\n  \"teleology\": [\n    {\n      \"year\": 1995,\n      \"claim\": \"Established NEUROD1 as a neuronal determination factor by showing it is sufficient to drive ectopic neuron formation, defining the central question of how a single bHLH factor commits cells to neuronal fate.\",\n      \"evidence\": \"Ectopic gain-of-function expression in Xenopus embryos with morphological and molecular readout\",\n      \"pmids\": [\"7754368\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define the genomic targets or chromatin context underlying the conversion\", \"Did not address endogenous requirement\"]\n    },\n    {\n      \"year\": 1997,\n      \"claim\": \"Defined an essential endogenous requirement for NEUROD1 beyond neurons, showing it is needed for beta-cell terminal differentiation and islet morphogenesis, revealing a shared neuroendocrine differentiation role.\",\n      \"evidence\": \"Knockout mice with histology and immunocytochemistry; corticotroph POMC E-box studies with Co-IP, EMSA, reporter assays\",\n      \"pmids\": [\"9308961\", \"9343431\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not identify the full beta-cell target gene network\", \"Mechanism of maturation versus initial specification not separated\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Placed NEUROD1 within a transcriptional cascade by showing Neurogenin3 directly activates its promoter through E-boxes, defining upstream regulatory logic of endocrine differentiation.\",\n      \"evidence\": \"Promoter deletion/mutagenesis, EMSA, reporter assays, and Xenopus ectopic expression\",\n      \"pmids\": [\"10757813\", \"10639171\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish whether the cascade operates identically across all endocrine and neural lineages\"]\n    },\n    {\n      \"year\": 2002,\n      \"claim\": \"Resolved how NEUROD1 selects targets and is itself modulated, identifying direct activation of SUR1, dual activator/repressor function, c-Myc competition, MAPK-driven nuclear shuttling via Ser274, Id2 antagonism, and Finb/RREB-1 cooperation.\",\n      \"evidence\": \"EMSA, reporter assays with E-box mutants, dominant-negatives, subcellular fractionation, MEK inhibition, and Co-IP across multiple cell lines\",\n      \"pmids\": [\"11981044\", \"11799123\", \"12297313\", \"12526101\", \"12482979\", \"11861467\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Most regulatory interactions characterized in single labs on episomal reporters\", \"Physiological weighting of each input in vivo unclear\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Connected NEUROD1 to activity-dependent signaling and chromatin remodeling, showing CaMKII phosphorylation at Ser336 stimulates its activity to drive dendritogenesis and that Brg1/SWI-SNF is required for its transactivation.\",\n      \"evidence\": \"In vitro kinase assay with site-directed mutagenesis, neuronal knockdown with dendritic morphometry, Co-IP with dominant-negative Brg1 and reporter assays\",\n      \"pmids\": [\"14741104\", \"15576411\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not map genome-wide chromatin remodeling events\", \"Did not resolve how phosphorylation alters DNA binding or cofactor recruitment\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Linked NEUROD1 expression to metabolic and stress signaling and explored protein-level entry, defining a FoxO1-PML-Sirt1 axis controlling its expression and a heparan-sulfate-dependent transduction route.\",\n      \"evidence\": \"Co-IP of FoxO1-PML-Sirt1 complex with acetylation mutants and transgenic mice; protein transduction with subcellular imaging and insulin promoter binding\",\n      \"pmids\": [\"16154098\", \"16186386\", \"15906379\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Protein transduction route characterized in single lab without independent confirmation\", \"Physiological relevance of extracellular NEUROD1 entry unclear\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Provided structural and genomic logic for NEUROD1 DNA recognition, determining the E47-NEUROD1 heterodimer crystal structure on the insulin E-box and mapping neuron-specific target enhancers and cooperating factors.\",\n      \"evidence\": \"X-ray crystallography of bHLH heterodimer, ChIP and enhancer reporter assays in Xenopus and mouse, C/EBP Co-IP and ChIP\",\n      \"pmids\": [\"18069799\", \"18007592\", \"17254333\", \"17149999\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structure limited to bHLH domain on one E-box\", \"Did not define how heterodimer choice is regulated in vivo\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Defined NEUROD1's role in functional cell maturation and circuit-level outcomes, showing it is required for glucose-responsive beta-cell maturation, spiral/vestibular neuron survival and axon guidance, hair-cell fate suppression, and opioid-regulated spine stability.\",\n      \"evidence\": \"Conditional knockouts with glucose/insulin assays and metabolic profiling; ear conditional knockouts with anatomical tracing; CaMKII/miR-190 manipulation with spine morphometry\",\n      \"pmids\": [\"20374962\", \"20512592\", \"20661473\", \"20554861\", \"18199774\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct target genes mediating each maturation/survival phenotype only partially defined\", \"Tissue-specific cofactor requirements not fully resolved\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Established NEUROD1 as a pioneer factor that reprograms silenced chromatin to euchromatin with epigenetic memory, and defined a combinatorial Insm1/Neurod1/Foxa2 module governing beta-cell maturity.\",\n      \"evidence\": \"ChIP-seq, ATAC-seq, RNA-seq with conditional induction in progenitors; Co-IP and ChIP-seq co-occupancy with conditional Insm1 ablation; zebrafish Notch epistasis\",\n      \"pmids\": [\"26516211\", \"25828096\", \"26580854\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular basis of pioneer access to closed chromatin not fully resolved\", \"Chromatin remodeling cofactors recruited to silenced loci not exhaustively defined\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Defined NEUROD1's oncogenic transcriptional program in neuroendocrine cancer, showing it occupies distinct loci from ASCL1, targets MYC, and promotes SCLC malignant behavior, TrkB/NCAM signaling, and G6PD-driven metabolism.\",\n      \"evidence\": \"ChIP-seq comparison with ASCL1, CRISPR/siRNA knockdown, SCLC mouse and xenograft models, metabolic flux analysis\",\n      \"pmids\": [\"27452466\", \"23553831\", \"34657129\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish whether oncogenic targets overlap developmental targets\", \"Mechanism of NEUROD1-vs-ASCL1 subtype divergence unclear\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Revealed a non-canonical role as a DNA-binding-dependent coactivator conferring nuclear receptor selectivity, with NeuroD factors marking mineralocorticoid- but not glucocorticoid-receptor binding sites.\",\n      \"evidence\": \"MR/GR ChIP-seq, de novo motif and co-occupancy analysis, reporter assays in HEK293\",\n      \"pmids\": [\"28324065\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Physiological consequence of MR coactivation in vivo not established\", \"Whether NEUROD1 itself (versus NeuroD2) mediates this in target tissues unclear\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Extended the pioneer-factor model to cell reprogramming and tumor differentiation, showing NEUROD1 occupies bivalent chromatin in microglia and that its epigenetic repression in medulloblastoma can be relieved to force differentiation.\",\n      \"evidence\": \"ChIP-seq for H3K4me3/H3K27me3, ATAC-seq, lentiviral expression; scRNA-seq with EZH2 inhibition and H3K27me3 ChIP\",\n      \"pmids\": [\"30638745\", \"32579914\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Microglia-to-neuron conversion claim later contested\", \"Direct versus indirect chromatin effects not fully separated\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Refined developmental and reprogramming roles, demonstrating NEUROD1 requirement for human and mouse endocrine differentiation and perinatal islet proliferation, while lineage tracing refuted prior microglia-to-neuron conversion as artifactual.\",\n      \"evidence\": \"NEUROD1 inactivation in human ESCs and mouse conditional knockouts with transcriptome/H3K27me3 profiling; strict Cre-lox lineage tracing with cell-death assays\",\n      \"pmids\": [\"31519700\", \"34201511\", \"34875233\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Reconciliation of pioneer activity with failure to reprogram microglia not mechanistically resolved\", \"Boundaries of NEUROD1 reprogramming competence across cell types undefined\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Consolidated NEUROD1 as a maintainer of a permissive endocrine chromatin landscape and a cooperating driver of cortical migration with Tcf12, linking its pioneer activity to lineage stability and morphogenesis.\",\n      \"evidence\": \"Conditional knockout with transcriptome and H3K27me3 ChIP-seq/ATAC-seq; Co-IP and co-occupancy ChIP-seq with in vivo cortical migration assays; BET protein Co-IP, ChIP-seq, xenograft\",\n      \"pmids\": [\"37689751\", \"35147187\", \"36378541\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How NEUROD1 partner choice (Tcf12, Insm1/Foxa2, BET, E47) is determined in each tissue remains unresolved\", \"Direct chromatin-modifying enzymes recruited by NEUROD1 not fully identified\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How NEUROD1 selects its pioneer target loci, recruits chromatin remodelers, and switches between distinct cofactor partnerships across neural, endocrine, and oncogenic contexts remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No structural model of NEUROD1 engaging nucleosomal/closed chromatin\", \"Mechanism coupling post-translational modification to target selection unknown\", \"Determinants of tissue-specific partner choice undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [0, 2, 11, 13, 29, 33]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [13, 16, 23, 39]},\n      {\"term_id\": \"GO:0003700\", \"supporting_discovery_ids\": [2, 11, 16]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [13, 20, 29]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [20]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [2, 13, 29, 33]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 3, 6, 26, 27, 36]},\n      {\"term_id\": \"R-HSA-4839726\", \"supporting_discovery_ids\": [29, 33, 37]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [28, 31, 39, 42]}\n    ],\n    \"complexes\": [\n      \"E47-NEUROD1 bHLH heterodimer\",\n      \"Insm1-Neurod1-Foxa2 complex\",\n      \"INSM1-cyclin D1-HDAC1/3 repressor complex (at NeuroD1 promoter)\"\n    ],\n    \"partners\": [\n      \"TCF3 (E47)\",\n      \"SMARCA4 (Brg1)\",\n      \"TCF12\",\n      \"INSM1\",\n      \"FOXA2\",\n      \"BRD4\",\n      \"CEBPA\",\n      \"RREB1\"\n    ],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":8,"faith_pct":87.5}}