{"gene":"NKX6-1","run_date":"2026-04-29T11:37:57","timeline":{"discoveries":[{"year":2000,"finding":"Nkx6.1 acts downstream of Nkx2.2 in the major pathway of beta-cell formation during the secondary transition; in Nkx6.1/Nkx2.2 double mutants, islet development is identical to Nkx2.2 single mutants, placing Nkx6.1 epistatic to Nkx2.2 in this pathway.","method":"Genetic epistasis using Nkx6.1 single knockout and Nkx6.1/Nkx2.2 double knockout mice with analysis of beta-cell precursors and beta-cell neogenesis","journal":"Development","confidence":"High","confidence_rationale":"Tier 1 — clean genetic epistasis in mouse KO models with defined cellular phenotype, highly cited foundational paper","pmids":["11076772"],"is_preprint":false},{"year":2000,"finding":"Nkx6.1 is required for somatic motor neuron and V2 interneuron fate specification in the ventral spinal cord; loss of Nkx6.1 causes a dorsal-to-ventral switch in progenitor identity and a compensatory expansion of V1 neurons.","method":"Targeted mutation in mice with analysis of neuronal progenitor domains and postmitotic neuron fates","journal":"Genes & development","confidence":"High","confidence_rationale":"Tier 2 — clean KO with defined cellular phenotype, highly cited","pmids":["10970877"],"is_preprint":false},{"year":2000,"finding":"The Nkx6.1 homeodomain binds the consensus sequence TTAATTAC with high specificity; full-length Nkx6.1 has reduced DNA binding due to a C-terminal acidic domain that functions as a mobile binding interference domain; Nkx6.1 represses transcription through Nkx6.1 binding sites in fibroblasts and represses the insulin promoter through TAAT sequences in beta-cell lines; transcriptional repression maps to a discrete region in the amino terminus.","method":"In vitro DNA binding assays, Gal4 one-hybrid fusion studies, reporter gene analysis, deletion/mutagenesis","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1 — in vitro biochemical assays with mutagenesis, functional reporter validation","pmids":["10799563"],"is_preprint":false},{"year":2000,"finding":"Nkx6.1 transcription is driven by a promoter with activity dependent on sequences at approximately -800 bp and the 5'-UTR; the homeodomain transcription factors PDX1 and Nkx2.2 bind to the -800 bp element; the 5'-UTR functions as an internal ribosomal entry site providing cell-type-specific translational regulation.","method":"Promoter deletion analysis, electrophoretic mobility shift assays (EMSA), dicistronic reporter assays","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1 — in vitro binding assays combined with functional reporter assays and ribosome entry site characterization","pmids":["10938085"],"is_preprint":false},{"year":1999,"finding":"The Nkx6.1 homeodomain binds the DNA sequence TTAATTG/A identified by in vitro binding site selection; full-length Nkx6.1 fails to activate a reporter through this site despite robust in vitro binding; stable Nkx6.1 expression in alpha-cell-like MSL-G-AN cells induces endogenous insulin gene expression.","method":"In vitro binding site selection, reporter assays, stable transfection with Nkx6.1HD/VP16 fusion","journal":"FEBS letters","confidence":"High","confidence_rationale":"Tier 1 — in vitro binding assay with functional validation","pmids":["10567713"],"is_preprint":false},{"year":2004,"finding":"Nkx6.1 is a bifunctional transcription factor: it represses target genes through A/T-rich sequences in most contexts but acts as a transcriptional activator at a beta-cell-specific enhancer element between -157 and -30 bp of its own promoter through a modular acidic C-terminal sequence, establishing positive autoregulatory feedback; Nkx6.1 binds this enhancer both in vitro and in vivo in betaTC3 cells.","method":"Reporter gene assays, EMSAs, chromatin immunoprecipitation (ChIP), deletion/mutagenesis","journal":"Molecular Endocrinology","confidence":"High","confidence_rationale":"Tier 1 — in vitro and in vivo ChIP with mutagenesis confirming direct binding and activation","pmids":["15056733"],"is_preprint":false},{"year":2005,"finding":"Nkx6.1 suppresses glucagon expression in beta-cell lines and primary islets, independent of Pdx1; RNAi-mediated knockdown of Nkx6.1 in glucose-responsive INS-1 class 3 cells causes a decrease in glucose-stimulated insulin secretion (GSIS) from 13.9-fold to 3.7-fold; overexpression of Nkx6.1 in glucose-unresponsive/glucagon-expressing class 1 cells suppresses glucagon expression.","method":"RNAi knockdown, overexpression with adenovirus, measurement of GSIS, mRNA quantification","journal":"PNAS","confidence":"High","confidence_rationale":"Tier 2 — reciprocal gain/loss-of-function in cell lines and primary islets, multiple phenotypic readouts","pmids":["15883383"],"is_preprint":false},{"year":2005,"finding":"The C-terminal domain of Nkx6.1 enhances sequence-selectivity of homeodomain DNA binding at TAAT sequences by ~10-fold (while reducing affinity only ~2-fold), and this selectivity is functionally preserved in mammalian cells; a stretch of conserved residues between amino acids 318-338 mediates this selectivity and can confer similar properties on the heterologous Pdx-1 homeodomain.","method":"Quantitative gel shift analysis, reporter gene analysis, deletional and mutational studies, circular dichroism spectroscopy","journal":"Biochemistry","confidence":"High","confidence_rationale":"Tier 1 — in vitro biophysical and biochemical assays with mutagenesis and functional reporter validation","pmids":["16101311"],"is_preprint":false},{"year":2007,"finding":"Nkx6.1 inhibits glucagon gene transcription by competing with Pax6 for binding to the G1 element of the glucagon promoter; Nkx6.1 interacts weakly with Pax6 in vitro and in vivo; ChIP confirms Nkx6.1 occupancy of the glucagon promoter in vivo.","method":"Transient transfection reporter assays, gel-shift/EMSA, site-directed mutagenesis, co-immunoprecipitation, chromatin immunoprecipitation","journal":"Biochemical Journal","confidence":"High","confidence_rationale":"Tier 1-2 — multiple orthogonal methods including ChIP, mutagenesis, and Co-IP","pmids":["17263687"],"is_preprint":false},{"year":2008,"finding":"Nkx6.1 overexpression in primary rat islets induces beta-cell proliferation by upregulating cyclins A, B, and E, and several regulatory kinases; Nkx6.1 directly binds cyclin A2 and B1 gene promoters as shown by ChIP; cyclin E overexpression alone is sufficient to activate islet cell proliferation; Nkx6.1 overexpression enhances GSIS in rat islets and increases thymidine incorporation in human islets with retention of GSIS.","method":"Adenoviral overexpression, BrdU/thymidine incorporation, microarray, real-time PCR, immunoblot, chromatin immunoprecipitation (ChIP)","journal":"Molecular and Cellular Biology","confidence":"High","confidence_rationale":"Tier 1-2 — direct ChIP evidence of promoter binding combined with gain-of-function proliferation phenotype in primary cells, replicated in human islets","pmids":["18347054"],"is_preprint":false},{"year":2007,"finding":"Nkx6.1 requires expression in multipotent Pdx1+ pancreatic progenitors (before Ngn3 activation) to specify beta-cell fate; expression of Nkx6.2 in Pdx1+ progenitors rescues beta-cell formation in Nkx6.1 mutant mice equivalently to Nkx6.1, demonstrating that Nkx6.1 and Nkx6.2 have equivalent biochemical activities and that their distinct developmental roles arise from divergent expression domains.","method":"Transgenic rescue experiments in Nkx6.1 mutant mice with Pdx1- or Ngn3-promoter-driven transgenes","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 — genetic rescue experiments with defined transgene constructs demonstrating pathway position and activity equivalence","pmids":["17537793"],"is_preprint":false},{"year":2008,"finding":"Nkx6.1 is required for migration and axon pathfinding of cranial branchio-motoneurons in the hindbrain; in Nkx6.1 mutants, facial branchio-motoneurons show ectopic expression of cell surface receptors Ret and Unc5h3, suggesting a cell-autonomous role for Nkx6.1 in controlling migration through regulation of guidance receptors.","method":"Analysis of Nkx6.1-deficient mouse embryos, immunohistochemistry for Ret and Unc5h3 expression","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 — KO with specific cellular phenotype and molecular mechanism (guidance receptor misexpression)","pmids":["14534138"],"is_preprint":false},{"year":2008,"finding":"Nkx6.1 controls the identity and fate of red nucleus neurons in the ventral midbrain; Nkx6-1 is also expressed in postmitotic oculomotor/trochlear neurons and controls their migration and axon outgrowth by regulating axon guidance/neuronal migration molecules.","method":"Mouse genetics (Nkx6-1 KO), in situ hybridization, immunohistochemistry","journal":"Development","confidence":"High","confidence_rationale":"Tier 2 — clean KO with defined neuronal phenotypes and pathway placement","pmids":["19592574"],"is_preprint":false},{"year":2008,"finding":"Nkx6.1 motor pool expression status defines early transcriptional identity of motor pools prior to axon branching, and regulates muscle nerve formation and specific muscle innervation patterns.","method":"Mouse genetics, analysis of motor pool identity and nerve-muscle connectivity","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 2 — genetic experiments with defined connectivity phenotype","pmids":["18215620"],"is_preprint":false},{"year":2013,"finding":"Conditional inactivation of Nkx6.1 in adult mouse beta-cells causes rapid-onset diabetes and hypoinsulinemia; Nkx6.1 controls insulin biosynthesis, insulin secretion, and beta-cell proliferation; loss of Nkx6.1 causes beta-cells to acquire molecular characteristics of delta cells, revealing a molecular link between impaired beta-cell function and loss of cell identity.","method":"Conditional knockout in adult mice, genome-wide analysis of regulated genes, functional secretion assays","journal":"Cell Reports","confidence":"High","confidence_rationale":"Tier 2 — conditional KO with defined phenotype, genome-wide target analysis, and functional assays","pmids":["24035389"],"is_preprint":false},{"year":2013,"finding":"Nkx6.1 is both necessary and sufficient to specify insulin-producing beta cells from endocrine precursors; heritable Nkx6.1 expression in endocrine precursors respecifies non-beta precursors towards beta cell lineage; Nkx6.1 directly binds and represses the alpha-cell determinant Arx; Nkx6.1 and the Arx activator Isl1 regulate Arx transcription antagonistically, establishing competition as a mechanism for alpha vs. beta cell identity determination.","method":"Conditional KO and gain-of-function mouse genetics, ChIP for Arx binding, reporter assays","journal":"PLoS Genetics","confidence":"High","confidence_rationale":"Tier 1-2 — ChIP evidence for direct Arx binding plus genetic gain/loss-of-function with mechanistic epistasis","pmids":["23382704"],"is_preprint":false},{"year":2014,"finding":"Nkx6.1 induces expression of orphan nuclear receptors Nr4a1 and Nr4a3, which are both necessary and sufficient for Nkx6.1-mediated beta-cell proliferation; Nr4a receptors increase E2F1 and cyclin E1 expression and induce components of the anaphase-promoting complex including UBE2C, leading to degradation of p21.","method":"Adenoviral overexpression and knockdown, global Nr4a1 knockout mice, cell cycle marker analysis","journal":"PNAS","confidence":"High","confidence_rationale":"Tier 2 — epistasis established by necessity and sufficiency tests, confirmed in vivo by KO mice","pmids":["24706823"],"is_preprint":false},{"year":2014,"finding":"Nkx6.1 is required for postnatal beta-cell mass expansion; genetic inactivation in newly formed beta-cells causes drastic decrease in early postnatal beta-cell proliferation and reduced beta-cell mass; Nkx6.1 regulates expression of beta-cell maturation markers and nutrient sensors Glut2 and Glp1r.","method":"Conditional knockout in neonatal mice, BrdU proliferation assay, beta-cell mass measurement, gene expression analysis","journal":"Diabetes","confidence":"High","confidence_rationale":"Tier 2 — conditional KO with specific postnatal phenotype and molecular target identification","pmids":["25277396"],"is_preprint":false},{"year":2010,"finding":"NKX6.1 binds to a cis-regulatory element in the HNF1alpha promoter and activates HNF1alpha gene expression in beta-cells; site-directed mutagenesis of the NKX6.1 core-binding sequence eliminates NKX6.1-mediated activation; overexpression or siRNA knockdown of Nkx6.1 correspondingly increases or decreases HNF1alpha expression.","method":"EMSA, ChIP, reporter assays, site-directed mutagenesis, siRNA knockdown, overexpression","journal":"Journal of Biological Chemistry","confidence":"High","confidence_rationale":"Tier 1 — multiple orthogonal methods including direct binding, mutagenesis, and functional validation","pmids":["20106981"],"is_preprint":false},{"year":2015,"finding":"Nkx6.1 localizes to the promoter of AURKA (Aurora Kinase A) and induces its expression; adenoviral overexpression of AURKA is sufficient to induce beta-cell proliferation; AURKA is necessary for Nkx6.1-mediated beta-cell proliferation; AURKA induces phosphorylation and degradation of p53 to permit cell cycle progression.","method":"ChIP, adenoviral overexpression, shRNA knockdown, pharmacological inhibition, BrdU incorporation, histone H3 phosphorylation assay","journal":"Islets","confidence":"High","confidence_rationale":"Tier 1-2 — direct ChIP evidence for promoter occupancy, necessity/sufficiency of AURKA in Nkx6.1 pathway","pmids":["26030060"],"is_preprint":false},{"year":2016,"finding":"Nkx6.1-mediated upregulation of Nr4a1, Nr4a3, and VGF depends on c-Fos expression; c-Fos overexpression activates Nkx6.1-responsive genes and increases beta-cell proliferation, insulin secretion, and survival; c-Fos knockdown impedes Nkx6.1-mediated beta-cell proliferation and insulin secretion.","method":"Adenoviral overexpression and shRNA knockdown of c-Fos, gene expression analysis, BrdU proliferation, GSIS assay","journal":"FEBS Letters","confidence":"Medium","confidence_rationale":"Tier 2 — epistasis by knockdown/overexpression of c-Fos in Nkx6.1 pathway, single lab","pmids":["27164028"],"is_preprint":false},{"year":2015,"finding":"NKX6.1 suppresses tumor metastasis and EMT by directly enhancing E-cadherin mRNA expression through recruitment of BAF155 coactivator and repressing vimentin and N-cadherin by recruiting RBBP7 corepressor.","method":"Co-immunoprecipitation, reporter assays, in vitro and in vivo metastasis assays, loss-of-function","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2-3 — Co-IP and reporter assays showing epigenetic modifier recruitment, single lab","pmids":["26257059"],"is_preprint":false},{"year":2016,"finding":"NKX6.1 directly binds the proximal region of the IL6 promoter in basal-like breast cancer cells and upregulates IL-6 expression, which promotes cancer cell growth; NKX6.1 depletion reduces IL6 promoter activity and cell growth.","method":"Pull-down assay, reporter assay, loss-of-function knockdown, rescue with exogenous IL-6, xenograft tumor formation","journal":"Experimental Cell Research","confidence":"Medium","confidence_rationale":"Tier 3 — single Co-IP/pulldown with functional reporter, single lab","pmids":["27032575"],"is_preprint":false},{"year":2016,"finding":"Nkx6.1 regulates Notch1 expression in ventral neural stem/progenitor cells of the developing spinal cord by interacting with a 139 bp enhancer sequence (CR2) in the second intron of the Notch1 locus; knockdown or overexpression of Nkx6.1 leads to corresponding down- or up-regulation of Notch1 expression.","method":"Luciferase reporter assays, ChIP, shRNA knockdown, overexpression, CR2-GFP transgenic mouse analysis","journal":"Scientific Reports","confidence":"Medium","confidence_rationale":"Tier 2 — direct enhancer binding by ChIP plus loss/gain-of-function, single lab","pmids":["27924849"],"is_preprint":false},{"year":2014,"finding":"Control of astrocyte progenitor specification, migration, and maturation in the ventral spinal cord requires Nkx6.1; conventional Nkx6.1 KO disrupts initial specification of astrocyte progenitors and migration/differentiation; conditional KO reveals delayed differentiation and disorganized arrangement of fibrous astrocytes.","method":"Conventional and conditional Nkx6.1 knockout mouse analysis, immunohistochemistry","journal":"PloS One","confidence":"Medium","confidence_rationale":"Tier 2 — clean KO with defined cellular phenotype, single lab","pmids":["25285789"],"is_preprint":false},{"year":2020,"finding":"The lncRNA ROIT binds DNA methyltransferase DNMT3a and causes its degradation through the ubiquitin-proteasome pathway, thereby blocking methylation of the Nkx6.1 promoter and maintaining Nkx6.1 expression for insulin transcription; reduced ROIT in obese mice leads to increased Nkx6.1 promoter methylation and beta-cell dysfunction.","method":"RNA pull-down, RNA immunoprecipitation, co-immunoprecipitation, bisulfite sequencing, siRNA knockdown/overexpression","journal":"Diabetologia","confidence":"Medium","confidence_rationale":"Tier 2 — multiple biochemical methods establishing mechanism, single lab","pmids":["32008054"],"is_preprint":false},{"year":2010,"finding":"NKX6.1 activates immature pancreatic markers NGN-3 and ISL-1 but not pancreatic hormone genes in human liver cells; NKX6.1 together with ectopic PDX-1 substantially and specifically promotes insulin expression and glucose-regulated insulin secretion to a greater extent than PDX-1 alone; NKX6.1 represses PDX-1-induced proglucagon expression.","method":"Adenoviral overexpression of NKX6.1 and/or PDX-1 in human liver cells, gene expression analysis, insulin secretion assay","journal":"Cellular Reprogramming","confidence":"Medium","confidence_rationale":"Tier 2-3 — functional gain-of-function with defined molecular readouts, single lab","pmids":["21108535"],"is_preprint":false},{"year":2003,"finding":"Adult postnatal spinal cord ependymal cells are derived from Nkx6.1+ ventral neural progenitor cells; Nkx6.1 expression in ependymal cells is maintained and regulated by Shh signaling from the floor plate.","method":"Immunohistochemistry and in situ hybridization tracking of Nkx6.1+ progenitor lineage in chick and mouse","journal":"Journal of Comparative Neurology","confidence":"Medium","confidence_rationale":"Tier 2 — direct lineage tracing with Shh dependence, single lab","pmids":["12528188"],"is_preprint":false},{"year":2024,"finding":"Nkx6.1 is specifically expressed in ventral astrocytes of the spinal cord; its deletion causes sex-specific effects on astrocyte morphology with enhanced complexity in males (accompanied by increased motor function and cholinergic synapses) and reduced complexity in females; Nkx6.1 exhibits sex-specific DNA-binding properties and epigenomic remodeling, with Semaphorin 4A (Sema4A) and Gabbr1 identified as targets regulating astrocyte morphology and cholinergic synapse formation.","method":"Conditional knockout, astrocyte morphology analysis, motor function assays, synapse quantification, ChIP/ATAC-seq","journal":"Cell Reports","confidence":"Medium","confidence_rationale":"Tier 2 — conditional KO with defined phenotype and direct genomic binding evidence, single lab","pmids":["39731735"],"is_preprint":false},{"year":2021,"finding":"Lentivirus-mediated Nkx6.1 expression in adult injured mouse spinal cord promotes proliferation of endogenous neural stem/progenitor cells, increases interneurons, reduces reactive astrocytes and glial scar, and represses neuroinflammation; transcriptomic analysis shows Nkx6.1 upregulates Notch signaling genes and downregulates neuroinflammation/reactive astrocyte pathways.","method":"Lentiviral overexpression in spinal cord injury mouse model, immunohistochemistry, RNA sequencing","journal":"Experimental Neurology","confidence":"Medium","confidence_rationale":"Tier 2-3 — in vivo gain-of-function with transcriptomic pathway analysis, single lab","pmids":["34343529"],"is_preprint":false},{"year":2019,"finding":"Bioinformatics analysis identified NKX6-1 binding motifs in promoters of ~78% of high-priority candidate genes deregulated in Fgfr2-deficient lenses; biochemical reporter assays demonstrated that NKX6-1 directly activates RASGRP1 expression, suggesting a regulatory module in which NKX6-1 activates Rasgrp1 to restore ERK/AKT balance.","method":"Transcriptomic analysis, luciferase reporter assays","journal":"Human Genetics","confidence":"Low","confidence_rationale":"Tier 3 — reporter assay for one target, bioinformatics for the rest, single lab, limited validation","pmids":["31691004"],"is_preprint":false}],"current_model":"NKX6-1 is a homeodomain transcription factor that acts as a bifunctional regulator (repressor or context-dependent activator) by binding TAAT-containing DNA sequences via its homeodomain, with its C-terminal domain modulating binding selectivity; it functions downstream of Nkx2.2 in the major pathway of pancreatic beta-cell specification (directly repressing the alpha-cell determinant Arx and competing with Isl1), is required postnatally for beta-cell mass expansion via a Nr4a1/Nr4a3→E2F1/cyclin E→APC/UBE2C/p21 proliferation pathway and an AURKA→p53 degradation axis, maintains beta-cell identity by sustaining expression of Glut2, HNF1alpha, and other functional genes while suppressing delta-cell and alternative endocrine programs, and in the nervous system specifies ventral neural progenitor identity, directs motor neuron fate, controls branchio-motoneuron migration through guidance receptor regulation, and regulates astrocyte morphology and synaptic connectivity in a sex-specific manner."},"narrative":{"teleology":[{"year":1999,"claim":"Establishing the DNA-binding specificity and transcriptional activity of NKX6-1 answered whether this homeodomain factor has sequence-selective DNA binding and what happens when it engages chromatin in different cell types.","evidence":"In vitro binding-site selection identified TTAATTG/A consensus; stable expression in alpha-cell line induced insulin gene expression","pmids":["10567713"],"confidence":"High","gaps":["No genome-wide target identification","Mechanism of insulin induction in alpha cells undefined"]},{"year":2000,"claim":"Biochemical dissection of NKX6-1 revealed it is primarily a transcriptional repressor with an N-terminal repression domain and a C-terminal mobile interference domain that modulates DNA-binding selectivity, resolving how a single homeodomain protein achieves context-dependent regulation.","evidence":"In vitro DNA binding, Gal4 fusions, reporter assays, and deletion mutagenesis in fibroblasts and beta-cell lines","pmids":["10799563"],"confidence":"High","gaps":["In vivo relevance of the interference domain not tested","No structural model of the C-terminal domain"]},{"year":2000,"claim":"Genetic studies established NKX6-1 as essential for both pancreatic beta-cell and ventral spinal cord neuron specification, placing it downstream of NKX2-2 in the pancreas and defining its domain of progenitor identity in the CNS.","evidence":"Nkx6.1 single and Nkx6.1/Nkx2.2 double KO mice (pancreas); Nkx6.1 targeted mutation with neuronal fate analysis (spinal cord)","pmids":["11076772","10970877"],"confidence":"High","gaps":["Direct transcriptional targets in progenitors unknown","Mechanism of epistatic relationship with Nkx2.2 not molecularly defined"]},{"year":2004,"claim":"Discovery of NKX6-1 as a bifunctional factor—repressor at most targets but activator at its own promoter enhancer—explained how it maintains expression through positive autoregulation in beta cells.","evidence":"Reporter assays, EMSA, ChIP at -157 to -30 bp of Nkx6.1 promoter in betaTC3 cells; C-terminal activation domain mapping","pmids":["15056733"],"confidence":"High","gaps":["Cofactors mediating the switch from repression to activation unidentified","Whether autoregulation operates in vivo not formally tested"]},{"year":2005,"claim":"Functional studies demonstrated that NKX6-1 suppresses glucagon expression and is required for glucose-stimulated insulin secretion, connecting its transcriptional activity to mature beta-cell function beyond developmental specification.","evidence":"RNAi knockdown reduced GSIS in INS-1 cells; overexpression suppressed glucagon in primary islets; quantitative binding selectivity of C-terminal domain measured","pmids":["15883383","16101311"],"confidence":"High","gaps":["Direct glucagon promoter target mechanism not yet fully resolved","C-terminal selectivity not tested genome-wide"]},{"year":2007,"claim":"NKX6-1 was shown to inhibit glucagon transcription by competing with Pax6 at the G1 element and to require expression in multipotent Pdx1+ progenitors (not Ngn3+ precursors) for beta-cell specification, defining the precise developmental window and a direct antagonistic mechanism.","evidence":"ChIP/EMSA at glucagon G1 element; transgenic rescue in Nkx6.1 mutants with Pdx1- vs. Ngn3-driven constructs","pmids":["17263687","17537793"],"confidence":"High","gaps":["Pax6-NKX6.1 interaction stoichiometry and dynamics in vivo unresolved","Chromatin context of competition not explored"]},{"year":2008,"claim":"NKX6-1 was identified as a direct driver of beta-cell proliferation through transcriptional activation of cell cycle genes (cyclins A2, B1, E), and its neuronal roles were extended to branchiomotor neuron migration (via Ret/Unc5h3) and motor pool identity.","evidence":"ChIP at cyclin promoters in primary rat islets with BrdU proliferation; Nkx6.1 KO analysis of hindbrain motor neuron migration and motor pool connectivity","pmids":["18347054","14534138","18215620"],"confidence":"High","gaps":["How NKX6-1 switches from specifying fate to driving proliferation mechanistically unclear","Direct regulation of Ret/Unc5h3 not confirmed by ChIP"]},{"year":2010,"claim":"Direct activation of HNF1alpha by NKX6-1 linked this factor to a broader beta-cell transcriptional network, explaining part of how NKX6-1 maintains mature beta-cell gene expression.","evidence":"EMSA, ChIP, mutagenesis of NKX6-1 binding site in HNF1alpha promoter, gain/loss-of-function in beta-cell lines","pmids":["20106981"],"confidence":"High","gaps":["HNF1alpha contribution to NKX6-1-dependent phenotypes not formally tested by epistasis"]},{"year":2013,"claim":"Two studies established that NKX6-1 is both necessary and sufficient for beta-cell identity: conditional adult deletion caused diabetes with delta-cell reprogramming, while NKX6-1 gain-of-function respecified non-beta precursors through direct Arx repression antagonistic to Isl1.","evidence":"Conditional KO in adult beta cells with genome-wide expression and secretion analysis; ChIP at Arx locus and genetic gain-of-function in endocrine precursors","pmids":["24035389","23382704"],"confidence":"High","gaps":["Full set of direct repression targets maintaining identity vs. delta-cell fate not catalogued","Isl1-NKX6-1 competition mechanism at chromatin level unresolved"]},{"year":2014,"claim":"The proliferative pathway downstream of NKX6-1 was molecularly elaborated: NKX6-1 induces Nr4a1/Nr4a3 orphan nuclear receptors, which activate E2F1/cyclin E and the APC/UBE2C axis to degrade p21, and NKX6-1 is required for postnatal beta-cell mass expansion.","evidence":"Nr4a1 KO mice and adenoviral epistasis experiments; conditional Nkx6.1 KO in neonatal beta cells with BrdU and mass quantification","pmids":["24706823","25277396"],"confidence":"High","gaps":["Whether Nr4a pathway operates in human beta-cell proliferation untested","Direct NKX6-1 binding at Nr4a1/Nr4a3 promoters not shown by ChIP"]},{"year":2015,"claim":"AURKA was identified as a direct NKX6-1 target that promotes beta-cell proliferation by phosphorylating and degrading p53, establishing a second parallel proliferative axis downstream of NKX6-1.","evidence":"ChIP at AURKA promoter, necessity/sufficiency tests with overexpression and shRNA, pharmacological inhibition","pmids":["26030060"],"confidence":"High","gaps":["Relative contribution of Nr4a vs. AURKA axis to overall proliferation not quantified","p53 degradation mechanism details beyond phosphorylation unclear"]},{"year":2016,"claim":"NKX6-1 was found to regulate Notch1 expression through a specific intronic enhancer (CR2) in ventral neural progenitors, and c-Fos was identified as a mediator of NKX6-1-dependent Nr4a/VGF induction and beta-cell proliferation.","evidence":"ChIP at Notch1 CR2 enhancer with gain/loss-of-function in neural cells; c-Fos knockdown/overexpression epistasis in beta cells","pmids":["27924849","27164028"],"confidence":"Medium","gaps":["Whether NKX6-1 directly activates c-Fos not established","CR2 enhancer activity not confirmed in mammalian neural progenitors in vivo beyond transgenic reporter"]},{"year":2024,"claim":"NKX6-1 was shown to regulate astrocyte morphology and cholinergic synapse formation in a sex-specific manner, with distinct DNA-binding and epigenomic profiles in males vs. females, identifying Sema4A and Gabbr1 as effectors.","evidence":"Conditional KO in ventral astrocytes, astrocyte morphology and synapse quantification, ChIP/ATAC-seq","pmids":["39731735"],"confidence":"Medium","gaps":["Mechanism of sex-specific DNA binding not molecularly explained","Whether sex-specific effects extend beyond spinal cord astrocytes unknown","Sema4A/Gabbr1 not confirmed as direct targets by individual ChIP-qPCR"]},{"year":null,"claim":"Key unresolved questions include the structural basis of the C-terminal binding-interference/activation domain switch, the complete direct target repertoire in human beta cells and neurons, how NKX6-1 transitions from a fate-specification role to a proliferation/maintenance role, and the molecular basis of its sex-specific chromatin remodeling in astrocytes.","evidence":"","pmids":[],"confidence":"High","gaps":["No crystal or cryo-EM structure of NKX6-1","Genome-wide direct target map in primary human beta cells lacking","Sex-specific cofactors or post-translational modifications unexplored"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[2,4,5,7,8]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[2,5,6,8,9,14,15,18]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[2,5,9,15,18]}],"pathway":[{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[0,1,10,11,12,13,24]},{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[9,16,19]},{"term_id":"R-HSA-162582","term_label":"Signal Transduction","supporting_discovery_ids":[16,23]}],"complexes":[],"partners":["PAX6","ISL1","PDX1","NKX2-2","NR4A1","NR4A3","BAF155","RBBP7"],"other_free_text":[]},"mechanistic_narrative":"NKX6-1 is a homeodomain transcription factor that functions as a bifunctional regulator of cell fate specification in the pancreas and nervous system. Its homeodomain binds TAAT-containing sequences (consensus TTAATTAC), with a C-terminal acidic domain enhancing binding selectivity ~10-fold; the N-terminus mediates transcriptional repression, while the C-terminal acidic domain enables context-dependent activation, including positive autoregulation in beta cells [PMID:10799563, PMID:16101311, PMID:15056733]. In the pancreas, NKX6-1 acts downstream of NKX2-2 in multipotent progenitors to specify beta-cell fate by directly repressing the alpha-cell determinant Arx (competing with Isl1), maintains beta-cell identity by activating Glut2, HNF1alpha, and insulin biosynthesis genes while suppressing delta-cell programs, and drives postnatal beta-cell proliferation through an Nr4a1/Nr4a3→E2F1/cyclin E→APC/UBE2C pathway and an AURKA→p53 degradation axis [PMID:11076772, PMID:23382704, PMID:24035389, PMID:24706823, PMID:26030060]. In the developing nervous system, NKX6-1 specifies ventral progenitor identity to direct motor neuron and V2 interneuron fates, controls branchiomotor neuron migration through regulation of guidance receptors such as Ret and Unc5h3, and regulates astrocyte morphology and cholinergic synapse formation in a sex-specific manner via targets including Sema4A and Gabbr1 [PMID:10970877, PMID:14534138, PMID:39731735]."},"prefetch_data":{"uniprot":{"accession":"P78426","full_name":"Homeobox protein Nkx-6.1","aliases":["Homeobox protein NK-6 homolog A"],"length_aa":367,"mass_kda":37.8,"function":"Transcription factor which binds to specific A/T-rich DNA sequences in the promoter regions of a number of genes. Involved in the development of insulin-producing beta cells in the islets of Langerhans at the secondary transition (By similarity). Together with NKX2-2 and IRX3 acts to restrict the generation of motor neurons to the appropriate region of the neural tube. 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diabetes.","date":"2021","source":"BMC endocrine disorders","url":"https://pubmed.ncbi.nlm.nih.gov/33711989","citation_count":4,"is_preprint":false},{"pmid":"39731735","id":"PMC_39731735","title":"Sex-specific astrocyte regulation of spinal motor circuits by Nkx6.1.","date":"2024","source":"Cell reports","url":"https://pubmed.ncbi.nlm.nih.gov/39731735","citation_count":3,"is_preprint":false},{"pmid":"35256556","id":"PMC_35256556","title":"NKX6-1 Is a Less Sensitive But Specific Biomarker of Chromophobe Renal Cell Carcinoma.","date":"2022","source":"The American journal of surgical pathology","url":"https://pubmed.ncbi.nlm.nih.gov/35256556","citation_count":2,"is_preprint":false},{"pmid":"39169394","id":"PMC_39169394","title":"MIR124-3 and NKX6-1 hypermethylation profiles accurately predict metachronous gastric lesions in a Caucasian population.","date":"2024","source":"Clinical epigenetics","url":"https://pubmed.ncbi.nlm.nih.gov/39169394","citation_count":1,"is_preprint":false},{"pmid":"33810480","id":"PMC_33810480","title":"Generation of a Novel Nkx6-1 Venus Fusion Reporter Mouse Line.","date":"2021","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/33810480","citation_count":1,"is_preprint":false},{"pmid":"41880516","id":"PMC_41880516","title":"NKX6.1 mRNA copy number is an actionable biomarker associated with islet function and clinical outcomes after islet transplantation.","date":"2026","source":"Science translational medicine","url":"https://pubmed.ncbi.nlm.nih.gov/41880516","citation_count":0,"is_preprint":false},{"pmid":"35592615","id":"PMC_35592615","title":"Micro-RNA-124-5p promotes insulin producing cell differentiation through regulating transcriptional factor NKX6.1.","date":"2022","source":"Biochemistry and biophysics 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Survival","date":"2024-10-01","source":"bioRxiv","url":"https://doi.org/10.1101/2024.09.30.615641","citation_count":0,"is_preprint":true},{"pmid":null,"id":"bio_10.1101_2024.05.17.594179","title":"Select DYRK1A Inhibitors Enhance Both Proliferation and Differentiation in Human Pancreatic Beta Cells","date":"2024-05-17","source":"bioRxiv","url":"https://doi.org/10.1101/2024.05.17.594179","citation_count":0,"is_preprint":true}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":42415,"output_tokens":7262,"usd":0.118087},"stage2":{"model":"claude-opus-4-6","input_tokens":10958,"output_tokens":3542,"usd":0.21501},"total_usd":0.333097,"stage1_batch_id":"msgbatch_012ZiiCUBfB62NCTQd4Bk1Jo","stage2_batch_id":"msgbatch_01Xuqq9aUHoQouS7UVGZNStZ","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2000,\n      \"finding\": \"Nkx6.1 acts downstream of Nkx2.2 in the major pathway of beta-cell formation during the secondary transition; in Nkx6.1/Nkx2.2 double mutants, islet development is identical to Nkx2.2 single mutants, placing Nkx6.1 epistatic to Nkx2.2 in this pathway.\",\n      \"method\": \"Genetic epistasis using Nkx6.1 single knockout and Nkx6.1/Nkx2.2 double knockout mice with analysis of beta-cell precursors and beta-cell neogenesis\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — clean genetic epistasis in mouse KO models with defined cellular phenotype, highly cited foundational paper\",\n      \"pmids\": [\"11076772\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Nkx6.1 is required for somatic motor neuron and V2 interneuron fate specification in the ventral spinal cord; loss of Nkx6.1 causes a dorsal-to-ventral switch in progenitor identity and a compensatory expansion of V1 neurons.\",\n      \"method\": \"Targeted mutation in mice with analysis of neuronal progenitor domains and postmitotic neuron fates\",\n      \"journal\": \"Genes & development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined cellular phenotype, highly cited\",\n      \"pmids\": [\"10970877\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"The Nkx6.1 homeodomain binds the consensus sequence TTAATTAC with high specificity; full-length Nkx6.1 has reduced DNA binding due to a C-terminal acidic domain that functions as a mobile binding interference domain; Nkx6.1 represses transcription through Nkx6.1 binding sites in fibroblasts and represses the insulin promoter through TAAT sequences in beta-cell lines; transcriptional repression maps to a discrete region in the amino terminus.\",\n      \"method\": \"In vitro DNA binding assays, Gal4 one-hybrid fusion studies, reporter gene analysis, deletion/mutagenesis\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro biochemical assays with mutagenesis, functional reporter validation\",\n      \"pmids\": [\"10799563\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Nkx6.1 transcription is driven by a promoter with activity dependent on sequences at approximately -800 bp and the 5'-UTR; the homeodomain transcription factors PDX1 and Nkx2.2 bind to the -800 bp element; the 5'-UTR functions as an internal ribosomal entry site providing cell-type-specific translational regulation.\",\n      \"method\": \"Promoter deletion analysis, electrophoretic mobility shift assays (EMSA), dicistronic reporter assays\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro binding assays combined with functional reporter assays and ribosome entry site characterization\",\n      \"pmids\": [\"10938085\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1999,\n      \"finding\": \"The Nkx6.1 homeodomain binds the DNA sequence TTAATTG/A identified by in vitro binding site selection; full-length Nkx6.1 fails to activate a reporter through this site despite robust in vitro binding; stable Nkx6.1 expression in alpha-cell-like MSL-G-AN cells induces endogenous insulin gene expression.\",\n      \"method\": \"In vitro binding site selection, reporter assays, stable transfection with Nkx6.1HD/VP16 fusion\",\n      \"journal\": \"FEBS letters\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro binding assay with functional validation\",\n      \"pmids\": [\"10567713\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Nkx6.1 is a bifunctional transcription factor: it represses target genes through A/T-rich sequences in most contexts but acts as a transcriptional activator at a beta-cell-specific enhancer element between -157 and -30 bp of its own promoter through a modular acidic C-terminal sequence, establishing positive autoregulatory feedback; Nkx6.1 binds this enhancer both in vitro and in vivo in betaTC3 cells.\",\n      \"method\": \"Reporter gene assays, EMSAs, chromatin immunoprecipitation (ChIP), deletion/mutagenesis\",\n      \"journal\": \"Molecular Endocrinology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro and in vivo ChIP with mutagenesis confirming direct binding and activation\",\n      \"pmids\": [\"15056733\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"Nkx6.1 suppresses glucagon expression in beta-cell lines and primary islets, independent of Pdx1; RNAi-mediated knockdown of Nkx6.1 in glucose-responsive INS-1 class 3 cells causes a decrease in glucose-stimulated insulin secretion (GSIS) from 13.9-fold to 3.7-fold; overexpression of Nkx6.1 in glucose-unresponsive/glucagon-expressing class 1 cells suppresses glucagon expression.\",\n      \"method\": \"RNAi knockdown, overexpression with adenovirus, measurement of GSIS, mRNA quantification\",\n      \"journal\": \"PNAS\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — reciprocal gain/loss-of-function in cell lines and primary islets, multiple phenotypic readouts\",\n      \"pmids\": [\"15883383\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"The C-terminal domain of Nkx6.1 enhances sequence-selectivity of homeodomain DNA binding at TAAT sequences by ~10-fold (while reducing affinity only ~2-fold), and this selectivity is functionally preserved in mammalian cells; a stretch of conserved residues between amino acids 318-338 mediates this selectivity and can confer similar properties on the heterologous Pdx-1 homeodomain.\",\n      \"method\": \"Quantitative gel shift analysis, reporter gene analysis, deletional and mutational studies, circular dichroism spectroscopy\",\n      \"journal\": \"Biochemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — in vitro biophysical and biochemical assays with mutagenesis and functional reporter validation\",\n      \"pmids\": [\"16101311\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Nkx6.1 inhibits glucagon gene transcription by competing with Pax6 for binding to the G1 element of the glucagon promoter; Nkx6.1 interacts weakly with Pax6 in vitro and in vivo; ChIP confirms Nkx6.1 occupancy of the glucagon promoter in vivo.\",\n      \"method\": \"Transient transfection reporter assays, gel-shift/EMSA, site-directed mutagenesis, co-immunoprecipitation, chromatin immunoprecipitation\",\n      \"journal\": \"Biochemical Journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — multiple orthogonal methods including ChIP, mutagenesis, and Co-IP\",\n      \"pmids\": [\"17263687\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Nkx6.1 overexpression in primary rat islets induces beta-cell proliferation by upregulating cyclins A, B, and E, and several regulatory kinases; Nkx6.1 directly binds cyclin A2 and B1 gene promoters as shown by ChIP; cyclin E overexpression alone is sufficient to activate islet cell proliferation; Nkx6.1 overexpression enhances GSIS in rat islets and increases thymidine incorporation in human islets with retention of GSIS.\",\n      \"method\": \"Adenoviral overexpression, BrdU/thymidine incorporation, microarray, real-time PCR, immunoblot, chromatin immunoprecipitation (ChIP)\",\n      \"journal\": \"Molecular and Cellular Biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct ChIP evidence of promoter binding combined with gain-of-function proliferation phenotype in primary cells, replicated in human islets\",\n      \"pmids\": [\"18347054\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"Nkx6.1 requires expression in multipotent Pdx1+ pancreatic progenitors (before Ngn3 activation) to specify beta-cell fate; expression of Nkx6.2 in Pdx1+ progenitors rescues beta-cell formation in Nkx6.1 mutant mice equivalently to Nkx6.1, demonstrating that Nkx6.1 and Nkx6.2 have equivalent biochemical activities and that their distinct developmental roles arise from divergent expression domains.\",\n      \"method\": \"Transgenic rescue experiments in Nkx6.1 mutant mice with Pdx1- or Ngn3-promoter-driven transgenes\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic rescue experiments with defined transgene constructs demonstrating pathway position and activity equivalence\",\n      \"pmids\": [\"17537793\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Nkx6.1 is required for migration and axon pathfinding of cranial branchio-motoneurons in the hindbrain; in Nkx6.1 mutants, facial branchio-motoneurons show ectopic expression of cell surface receptors Ret and Unc5h3, suggesting a cell-autonomous role for Nkx6.1 in controlling migration through regulation of guidance receptors.\",\n      \"method\": \"Analysis of Nkx6.1-deficient mouse embryos, immunohistochemistry for Ret and Unc5h3 expression\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — KO with specific cellular phenotype and molecular mechanism (guidance receptor misexpression)\",\n      \"pmids\": [\"14534138\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Nkx6.1 controls the identity and fate of red nucleus neurons in the ventral midbrain; Nkx6-1 is also expressed in postmitotic oculomotor/trochlear neurons and controls their migration and axon outgrowth by regulating axon guidance/neuronal migration molecules.\",\n      \"method\": \"Mouse genetics (Nkx6-1 KO), in situ hybridization, immunohistochemistry\",\n      \"journal\": \"Development\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined neuronal phenotypes and pathway placement\",\n      \"pmids\": [\"19592574\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Nkx6.1 motor pool expression status defines early transcriptional identity of motor pools prior to axon branching, and regulates muscle nerve formation and specific muscle innervation patterns.\",\n      \"method\": \"Mouse genetics, analysis of motor pool identity and nerve-muscle connectivity\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — genetic experiments with defined connectivity phenotype\",\n      \"pmids\": [\"18215620\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Conditional inactivation of Nkx6.1 in adult mouse beta-cells causes rapid-onset diabetes and hypoinsulinemia; Nkx6.1 controls insulin biosynthesis, insulin secretion, and beta-cell proliferation; loss of Nkx6.1 causes beta-cells to acquire molecular characteristics of delta cells, revealing a molecular link between impaired beta-cell function and loss of cell identity.\",\n      \"method\": \"Conditional knockout in adult mice, genome-wide analysis of regulated genes, functional secretion assays\",\n      \"journal\": \"Cell Reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with defined phenotype, genome-wide target analysis, and functional assays\",\n      \"pmids\": [\"24035389\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"Nkx6.1 is both necessary and sufficient to specify insulin-producing beta cells from endocrine precursors; heritable Nkx6.1 expression in endocrine precursors respecifies non-beta precursors towards beta cell lineage; Nkx6.1 directly binds and represses the alpha-cell determinant Arx; Nkx6.1 and the Arx activator Isl1 regulate Arx transcription antagonistically, establishing competition as a mechanism for alpha vs. beta cell identity determination.\",\n      \"method\": \"Conditional KO and gain-of-function mouse genetics, ChIP for Arx binding, reporter assays\",\n      \"journal\": \"PLoS Genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — ChIP evidence for direct Arx binding plus genetic gain/loss-of-function with mechanistic epistasis\",\n      \"pmids\": [\"23382704\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Nkx6.1 induces expression of orphan nuclear receptors Nr4a1 and Nr4a3, which are both necessary and sufficient for Nkx6.1-mediated beta-cell proliferation; Nr4a receptors increase E2F1 and cyclin E1 expression and induce components of the anaphase-promoting complex including UBE2C, leading to degradation of p21.\",\n      \"method\": \"Adenoviral overexpression and knockdown, global Nr4a1 knockout mice, cell cycle marker analysis\",\n      \"journal\": \"PNAS\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — epistasis established by necessity and sufficiency tests, confirmed in vivo by KO mice\",\n      \"pmids\": [\"24706823\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Nkx6.1 is required for postnatal beta-cell mass expansion; genetic inactivation in newly formed beta-cells causes drastic decrease in early postnatal beta-cell proliferation and reduced beta-cell mass; Nkx6.1 regulates expression of beta-cell maturation markers and nutrient sensors Glut2 and Glp1r.\",\n      \"method\": \"Conditional knockout in neonatal mice, BrdU proliferation assay, beta-cell mass measurement, gene expression analysis\",\n      \"journal\": \"Diabetes\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with specific postnatal phenotype and molecular target identification\",\n      \"pmids\": [\"25277396\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"NKX6.1 binds to a cis-regulatory element in the HNF1alpha promoter and activates HNF1alpha gene expression in beta-cells; site-directed mutagenesis of the NKX6.1 core-binding sequence eliminates NKX6.1-mediated activation; overexpression or siRNA knockdown of Nkx6.1 correspondingly increases or decreases HNF1alpha expression.\",\n      \"method\": \"EMSA, ChIP, reporter assays, site-directed mutagenesis, siRNA knockdown, overexpression\",\n      \"journal\": \"Journal of Biological Chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 — multiple orthogonal methods including direct binding, mutagenesis, and functional validation\",\n      \"pmids\": [\"20106981\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Nkx6.1 localizes to the promoter of AURKA (Aurora Kinase A) and induces its expression; adenoviral overexpression of AURKA is sufficient to induce beta-cell proliferation; AURKA is necessary for Nkx6.1-mediated beta-cell proliferation; AURKA induces phosphorylation and degradation of p53 to permit cell cycle progression.\",\n      \"method\": \"ChIP, adenoviral overexpression, shRNA knockdown, pharmacological inhibition, BrdU incorporation, histone H3 phosphorylation assay\",\n      \"journal\": \"Islets\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 — direct ChIP evidence for promoter occupancy, necessity/sufficiency of AURKA in Nkx6.1 pathway\",\n      \"pmids\": [\"26030060\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Nkx6.1-mediated upregulation of Nr4a1, Nr4a3, and VGF depends on c-Fos expression; c-Fos overexpression activates Nkx6.1-responsive genes and increases beta-cell proliferation, insulin secretion, and survival; c-Fos knockdown impedes Nkx6.1-mediated beta-cell proliferation and insulin secretion.\",\n      \"method\": \"Adenoviral overexpression and shRNA knockdown of c-Fos, gene expression analysis, BrdU proliferation, GSIS assay\",\n      \"journal\": \"FEBS Letters\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — epistasis by knockdown/overexpression of c-Fos in Nkx6.1 pathway, single lab\",\n      \"pmids\": [\"27164028\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"NKX6.1 suppresses tumor metastasis and EMT by directly enhancing E-cadherin mRNA expression through recruitment of BAF155 coactivator and repressing vimentin and N-cadherin by recruiting RBBP7 corepressor.\",\n      \"method\": \"Co-immunoprecipitation, reporter assays, in vitro and in vivo metastasis assays, loss-of-function\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — Co-IP and reporter assays showing epigenetic modifier recruitment, single lab\",\n      \"pmids\": [\"26257059\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"NKX6.1 directly binds the proximal region of the IL6 promoter in basal-like breast cancer cells and upregulates IL-6 expression, which promotes cancer cell growth; NKX6.1 depletion reduces IL6 promoter activity and cell growth.\",\n      \"method\": \"Pull-down assay, reporter assay, loss-of-function knockdown, rescue with exogenous IL-6, xenograft tumor formation\",\n      \"journal\": \"Experimental Cell Research\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 — single Co-IP/pulldown with functional reporter, single lab\",\n      \"pmids\": [\"27032575\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Nkx6.1 regulates Notch1 expression in ventral neural stem/progenitor cells of the developing spinal cord by interacting with a 139 bp enhancer sequence (CR2) in the second intron of the Notch1 locus; knockdown or overexpression of Nkx6.1 leads to corresponding down- or up-regulation of Notch1 expression.\",\n      \"method\": \"Luciferase reporter assays, ChIP, shRNA knockdown, overexpression, CR2-GFP transgenic mouse analysis\",\n      \"journal\": \"Scientific Reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct enhancer binding by ChIP plus loss/gain-of-function, single lab\",\n      \"pmids\": [\"27924849\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Control of astrocyte progenitor specification, migration, and maturation in the ventral spinal cord requires Nkx6.1; conventional Nkx6.1 KO disrupts initial specification of astrocyte progenitors and migration/differentiation; conditional KO reveals delayed differentiation and disorganized arrangement of fibrous astrocytes.\",\n      \"method\": \"Conventional and conditional Nkx6.1 knockout mouse analysis, immunohistochemistry\",\n      \"journal\": \"PloS One\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — clean KO with defined cellular phenotype, single lab\",\n      \"pmids\": [\"25285789\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"The lncRNA ROIT binds DNA methyltransferase DNMT3a and causes its degradation through the ubiquitin-proteasome pathway, thereby blocking methylation of the Nkx6.1 promoter and maintaining Nkx6.1 expression for insulin transcription; reduced ROIT in obese mice leads to increased Nkx6.1 promoter methylation and beta-cell dysfunction.\",\n      \"method\": \"RNA pull-down, RNA immunoprecipitation, co-immunoprecipitation, bisulfite sequencing, siRNA knockdown/overexpression\",\n      \"journal\": \"Diabetologia\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — multiple biochemical methods establishing mechanism, single lab\",\n      \"pmids\": [\"32008054\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"NKX6.1 activates immature pancreatic markers NGN-3 and ISL-1 but not pancreatic hormone genes in human liver cells; NKX6.1 together with ectopic PDX-1 substantially and specifically promotes insulin expression and glucose-regulated insulin secretion to a greater extent than PDX-1 alone; NKX6.1 represses PDX-1-induced proglucagon expression.\",\n      \"method\": \"Adenoviral overexpression of NKX6.1 and/or PDX-1 in human liver cells, gene expression analysis, insulin secretion assay\",\n      \"journal\": \"Cellular Reprogramming\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — functional gain-of-function with defined molecular readouts, single lab\",\n      \"pmids\": [\"21108535\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2003,\n      \"finding\": \"Adult postnatal spinal cord ependymal cells are derived from Nkx6.1+ ventral neural progenitor cells; Nkx6.1 expression in ependymal cells is maintained and regulated by Shh signaling from the floor plate.\",\n      \"method\": \"Immunohistochemistry and in situ hybridization tracking of Nkx6.1+ progenitor lineage in chick and mouse\",\n      \"journal\": \"Journal of Comparative Neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — direct lineage tracing with Shh dependence, single lab\",\n      \"pmids\": [\"12528188\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Nkx6.1 is specifically expressed in ventral astrocytes of the spinal cord; its deletion causes sex-specific effects on astrocyte morphology with enhanced complexity in males (accompanied by increased motor function and cholinergic synapses) and reduced complexity in females; Nkx6.1 exhibits sex-specific DNA-binding properties and epigenomic remodeling, with Semaphorin 4A (Sema4A) and Gabbr1 identified as targets regulating astrocyte morphology and cholinergic synapse formation.\",\n      \"method\": \"Conditional knockout, astrocyte morphology analysis, motor function assays, synapse quantification, ChIP/ATAC-seq\",\n      \"journal\": \"Cell Reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 — conditional KO with defined phenotype and direct genomic binding evidence, single lab\",\n      \"pmids\": [\"39731735\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Lentivirus-mediated Nkx6.1 expression in adult injured mouse spinal cord promotes proliferation of endogenous neural stem/progenitor cells, increases interneurons, reduces reactive astrocytes and glial scar, and represses neuroinflammation; transcriptomic analysis shows Nkx6.1 upregulates Notch signaling genes and downregulates neuroinflammation/reactive astrocyte pathways.\",\n      \"method\": \"Lentiviral overexpression in spinal cord injury mouse model, immunohistochemistry, RNA sequencing\",\n      \"journal\": \"Experimental Neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2-3 — in vivo gain-of-function with transcriptomic pathway analysis, single lab\",\n      \"pmids\": [\"34343529\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Bioinformatics analysis identified NKX6-1 binding motifs in promoters of ~78% of high-priority candidate genes deregulated in Fgfr2-deficient lenses; biochemical reporter assays demonstrated that NKX6-1 directly activates RASGRP1 expression, suggesting a regulatory module in which NKX6-1 activates Rasgrp1 to restore ERK/AKT balance.\",\n      \"method\": \"Transcriptomic analysis, luciferase reporter assays\",\n      \"journal\": \"Human Genetics\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 — reporter assay for one target, bioinformatics for the rest, single lab, limited validation\",\n      \"pmids\": [\"31691004\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"NKX6-1 is a homeodomain transcription factor that acts as a bifunctional regulator (repressor or context-dependent activator) by binding TAAT-containing DNA sequences via its homeodomain, with its C-terminal domain modulating binding selectivity; it functions downstream of Nkx2.2 in the major pathway of pancreatic beta-cell specification (directly repressing the alpha-cell determinant Arx and competing with Isl1), is required postnatally for beta-cell mass expansion via a Nr4a1/Nr4a3→E2F1/cyclin E→APC/UBE2C/p21 proliferation pathway and an AURKA→p53 degradation axis, maintains beta-cell identity by sustaining expression of Glut2, HNF1alpha, and other functional genes while suppressing delta-cell and alternative endocrine programs, and in the nervous system specifies ventral neural progenitor identity, directs motor neuron fate, controls branchio-motoneuron migration through guidance receptor regulation, and regulates astrocyte morphology and synaptic connectivity in a sex-specific manner.\"\n}\n```","stage2_raw":"```json\n{\n  \"mechanistic_narrative\": \"NKX6-1 is a homeodomain transcription factor that functions as a bifunctional regulator of cell fate specification in the pancreas and nervous system. Its homeodomain binds TAAT-containing sequences (consensus TTAATTAC), with a C-terminal acidic domain enhancing binding selectivity ~10-fold; the N-terminus mediates transcriptional repression, while the C-terminal acidic domain enables context-dependent activation, including positive autoregulation in beta cells [PMID:10799563, PMID:16101311, PMID:15056733]. In the pancreas, NKX6-1 acts downstream of NKX2-2 in multipotent progenitors to specify beta-cell fate by directly repressing the alpha-cell determinant Arx (competing with Isl1), maintains beta-cell identity by activating Glut2, HNF1alpha, and insulin biosynthesis genes while suppressing delta-cell programs, and drives postnatal beta-cell proliferation through an Nr4a1/Nr4a3→E2F1/cyclin E→APC/UBE2C pathway and an AURKA→p53 degradation axis [PMID:11076772, PMID:23382704, PMID:24035389, PMID:24706823, PMID:26030060]. In the developing nervous system, NKX6-1 specifies ventral progenitor identity to direct motor neuron and V2 interneuron fates, controls branchiomotor neuron migration through regulation of guidance receptors such as Ret and Unc5h3, and regulates astrocyte morphology and cholinergic synapse formation in a sex-specific manner via targets including Sema4A and Gabbr1 [PMID:10970877, PMID:14534138, PMID:39731735].\",\n  \"teleology\": [\n    {\n      \"year\": 1999,\n      \"claim\": \"Establishing the DNA-binding specificity and transcriptional activity of NKX6-1 answered whether this homeodomain factor has sequence-selective DNA binding and what happens when it engages chromatin in different cell types.\",\n      \"evidence\": \"In vitro binding-site selection identified TTAATTG/A consensus; stable expression in alpha-cell line induced insulin gene expression\",\n      \"pmids\": [\"10567713\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No genome-wide target identification\", \"Mechanism of insulin induction in alpha cells undefined\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Biochemical dissection of NKX6-1 revealed it is primarily a transcriptional repressor with an N-terminal repression domain and a C-terminal mobile interference domain that modulates DNA-binding selectivity, resolving how a single homeodomain protein achieves context-dependent regulation.\",\n      \"evidence\": \"In vitro DNA binding, Gal4 fusions, reporter assays, and deletion mutagenesis in fibroblasts and beta-cell lines\",\n      \"pmids\": [\"10799563\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo relevance of the interference domain not tested\", \"No structural model of the C-terminal domain\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Genetic studies established NKX6-1 as essential for both pancreatic beta-cell and ventral spinal cord neuron specification, placing it downstream of NKX2-2 in the pancreas and defining its domain of progenitor identity in the CNS.\",\n      \"evidence\": \"Nkx6.1 single and Nkx6.1/Nkx2.2 double KO mice (pancreas); Nkx6.1 targeted mutation with neuronal fate analysis (spinal cord)\",\n      \"pmids\": [\"11076772\", \"10970877\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct transcriptional targets in progenitors unknown\", \"Mechanism of epistatic relationship with Nkx2.2 not molecularly defined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Discovery of NKX6-1 as a bifunctional factor—repressor at most targets but activator at its own promoter enhancer—explained how it maintains expression through positive autoregulation in beta cells.\",\n      \"evidence\": \"Reporter assays, EMSA, ChIP at -157 to -30 bp of Nkx6.1 promoter in betaTC3 cells; C-terminal activation domain mapping\",\n      \"pmids\": [\"15056733\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Cofactors mediating the switch from repression to activation unidentified\", \"Whether autoregulation operates in vivo not formally tested\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Functional studies demonstrated that NKX6-1 suppresses glucagon expression and is required for glucose-stimulated insulin secretion, connecting its transcriptional activity to mature beta-cell function beyond developmental specification.\",\n      \"evidence\": \"RNAi knockdown reduced GSIS in INS-1 cells; overexpression suppressed glucagon in primary islets; quantitative binding selectivity of C-terminal domain measured\",\n      \"pmids\": [\"15883383\", \"16101311\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct glucagon promoter target mechanism not yet fully resolved\", \"C-terminal selectivity not tested genome-wide\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"NKX6-1 was shown to inhibit glucagon transcription by competing with Pax6 at the G1 element and to require expression in multipotent Pdx1+ progenitors (not Ngn3+ precursors) for beta-cell specification, defining the precise developmental window and a direct antagonistic mechanism.\",\n      \"evidence\": \"ChIP/EMSA at glucagon G1 element; transgenic rescue in Nkx6.1 mutants with Pdx1- vs. Ngn3-driven constructs\",\n      \"pmids\": [\"17263687\", \"17537793\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Pax6-NKX6.1 interaction stoichiometry and dynamics in vivo unresolved\", \"Chromatin context of competition not explored\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"NKX6-1 was identified as a direct driver of beta-cell proliferation through transcriptional activation of cell cycle genes (cyclins A2, B1, E), and its neuronal roles were extended to branchiomotor neuron migration (via Ret/Unc5h3) and motor pool identity.\",\n      \"evidence\": \"ChIP at cyclin promoters in primary rat islets with BrdU proliferation; Nkx6.1 KO analysis of hindbrain motor neuron migration and motor pool connectivity\",\n      \"pmids\": [\"18347054\", \"14534138\", \"18215620\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How NKX6-1 switches from specifying fate to driving proliferation mechanistically unclear\", \"Direct regulation of Ret/Unc5h3 not confirmed by ChIP\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Direct activation of HNF1alpha by NKX6-1 linked this factor to a broader beta-cell transcriptional network, explaining part of how NKX6-1 maintains mature beta-cell gene expression.\",\n      \"evidence\": \"EMSA, ChIP, mutagenesis of NKX6-1 binding site in HNF1alpha promoter, gain/loss-of-function in beta-cell lines\",\n      \"pmids\": [\"20106981\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"HNF1alpha contribution to NKX6-1-dependent phenotypes not formally tested by epistasis\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Two studies established that NKX6-1 is both necessary and sufficient for beta-cell identity: conditional adult deletion caused diabetes with delta-cell reprogramming, while NKX6-1 gain-of-function respecified non-beta precursors through direct Arx repression antagonistic to Isl1.\",\n      \"evidence\": \"Conditional KO in adult beta cells with genome-wide expression and secretion analysis; ChIP at Arx locus and genetic gain-of-function in endocrine precursors\",\n      \"pmids\": [\"24035389\", \"23382704\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Full set of direct repression targets maintaining identity vs. delta-cell fate not catalogued\", \"Isl1-NKX6-1 competition mechanism at chromatin level unresolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"The proliferative pathway downstream of NKX6-1 was molecularly elaborated: NKX6-1 induces Nr4a1/Nr4a3 orphan nuclear receptors, which activate E2F1/cyclin E and the APC/UBE2C axis to degrade p21, and NKX6-1 is required for postnatal beta-cell mass expansion.\",\n      \"evidence\": \"Nr4a1 KO mice and adenoviral epistasis experiments; conditional Nkx6.1 KO in neonatal beta cells with BrdU and mass quantification\",\n      \"pmids\": [\"24706823\", \"25277396\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether Nr4a pathway operates in human beta-cell proliferation untested\", \"Direct NKX6-1 binding at Nr4a1/Nr4a3 promoters not shown by ChIP\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"AURKA was identified as a direct NKX6-1 target that promotes beta-cell proliferation by phosphorylating and degrading p53, establishing a second parallel proliferative axis downstream of NKX6-1.\",\n      \"evidence\": \"ChIP at AURKA promoter, necessity/sufficiency tests with overexpression and shRNA, pharmacological inhibition\",\n      \"pmids\": [\"26030060\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relative contribution of Nr4a vs. AURKA axis to overall proliferation not quantified\", \"p53 degradation mechanism details beyond phosphorylation unclear\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"NKX6-1 was found to regulate Notch1 expression through a specific intronic enhancer (CR2) in ventral neural progenitors, and c-Fos was identified as a mediator of NKX6-1-dependent Nr4a/VGF induction and beta-cell proliferation.\",\n      \"evidence\": \"ChIP at Notch1 CR2 enhancer with gain/loss-of-function in neural cells; c-Fos knockdown/overexpression epistasis in beta cells\",\n      \"pmids\": [\"27924849\", \"27164028\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether NKX6-1 directly activates c-Fos not established\", \"CR2 enhancer activity not confirmed in mammalian neural progenitors in vivo beyond transgenic reporter\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"NKX6-1 was shown to regulate astrocyte morphology and cholinergic synapse formation in a sex-specific manner, with distinct DNA-binding and epigenomic profiles in males vs. females, identifying Sema4A and Gabbr1 as effectors.\",\n      \"evidence\": \"Conditional KO in ventral astrocytes, astrocyte morphology and synapse quantification, ChIP/ATAC-seq\",\n      \"pmids\": [\"39731735\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mechanism of sex-specific DNA binding not molecularly explained\", \"Whether sex-specific effects extend beyond spinal cord astrocytes unknown\", \"Sema4A/Gabbr1 not confirmed as direct targets by individual ChIP-qPCR\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"Key unresolved questions include the structural basis of the C-terminal binding-interference/activation domain switch, the complete direct target repertoire in human beta cells and neurons, how NKX6-1 transitions from a fate-specification role to a proliferation/maintenance role, and the molecular basis of its sex-specific chromatin remodeling in astrocytes.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"High\",\n      \"gaps\": [\"No crystal or cryo-EM structure of NKX6-1\", \"Genome-wide direct target map in primary human beta cells lacking\", \"Sex-specific cofactors or post-translational modifications unexplored\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [2, 4, 5, 7, 8]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [2, 5, 6, 8, 9, 14, 15, 18]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [2, 5, 9, 15, 18]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"GO:0074160\", \"supporting_discovery_ids\": [2, 5, 6, 9, 14, 15, 18]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [0, 1, 10, 11, 12, 13, 24]},\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [9, 16, 19]},\n      {\"term_id\": \"R-HSA-162582\", \"supporting_discovery_ids\": [16, 23]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\n      \"PAX6\",\n      \"ISL1\",\n      \"PDX1\",\n      \"NKX2-2\",\n      \"NR4A1\",\n      \"NR4A3\",\n      \"BAF155\",\n      \"RBBP7\"\n    ],\n    \"other_free_text\": []\n  }\n}\n```"}