{"gene":"ZNF106","run_date":"2026-06-11T09:02:07","timeline":{"discoveries":[{"year":2017,"finding":"Zfp106 specifically binds GGGGCC RNA repeats and interacts with multiple RNA-binding proteins including the ALS-associated factors TDP-43 and FUS, as identified by affinity purification-mass spectrometry.","method":"Affinity purification-mass spectrometry (AP-MS), RNA binding assay","journal":"eLife","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal AP-MS identifying specific binding partners, RNA binding assay, with functional validation in Drosophila model and mouse KO","pmids":["28072389"],"is_preprint":false},{"year":2017,"finding":"Zfp106 knockout mice develop severe motor neuron degeneration, which is rescued by transgenic restoration of Zfp106 specifically in motor neurons, establishing a cell-autonomous requirement of Zfp106 in motor neuron survival.","method":"Transgenic mouse rescue experiment (motor neuron-specific restoration), knockout mouse phenotype","journal":"eLife","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic rescue experiment in vivo with cell-type specificity, replicated across two independent knockout studies (PMID 28072389 and 26604141)","pmids":["28072389","26604141"],"is_preprint":false},{"year":2017,"finding":"Zfp106 potently suppresses GGGGCC repeat-induced neurotoxicity in a Drosophila model of C9orf72 ALS.","method":"Drosophila genetic model of C9orf72 ALS with Zfp106 overexpression","journal":"eLife","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vivo functional suppression in Drosophila model, single lab but consistent with mouse KO data","pmids":["28072389"],"is_preprint":false},{"year":2016,"finding":"ZFP106 associates with the core splicing factor RBM39 and localizes to nuclear speckles adjacent to spliceosomes; upon inhibition of pre-mRNA synthesis, ZFP106 translocates with other splicing factors to the nucleolus.","method":"Co-immunoprecipitation, immunofluorescence/subcellular fractionation, live-cell imaging upon transcription inhibition","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 2–3 / Moderate — co-IP plus direct localization experiments with functional context (splicing/transcription inhibition), single lab","pmids":["27418600"],"is_preprint":false},{"year":2016,"finding":"Genetic disruption of Zfp106 in mice results in altered splicing of the Nogo (Rtn4) gene locus in skeletal muscle, causing ectopic expression of NOGO-A, an inhibitor of nerve regeneration that destabilizes neuromuscular junctions.","method":"Zfp106 knockout mouse, RNA splicing analysis, protein expression analysis","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic knockout with defined molecular splicing readout and downstream pathway consequence, single lab","pmids":["27418600"],"is_preprint":false},{"year":2015,"finding":"Zfp106-deficient mice display selective motor and sensory neuronal degeneration in spinal cord and peripheral nervous system, with embryonic Zfp106−/− motor neurons showing inhibition of mitochondrial Complex I within the electron transport chain.","method":"Zfp106 knockout mouse characterization, mitochondrial Complex I activity assay in embryonic motor neurons","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — direct enzymatic assay for Complex I in KO neurons, single lab, single method for the mitochondrial phenotype","pmids":["26604141"],"is_preprint":false},{"year":2015,"finding":"ZFP106 is identified as a novel factor that regulates transcription initiation by RNA Polymerase I at the ribosomal RNA gene promoter, targeting RNA Pol I to the promoter.","method":"ePICh (end-targeting proteomics of isolated chromatin segments), chromatin affinity capture","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Weak — novel chromatin enrichment method with proteomics identification at a specific locus, single lab, limited functional follow-up reported in abstract","pmids":["25812914"],"is_preprint":false},{"year":2005,"finding":"The C-terminal WD40 repeat region of ZFP106 is required for nucleolar targeting; this domain interacts with TSG118, which co-localizes with ZFP106 in the nucleolus, and TSG118 downregulation during terminal differentiation coincides with loss of nucleolar ZFP106.","method":"Deletion analysis, yeast two-hybrid, co-localization by immunofluorescence, co-expression studies","journal":"The international journal of biochemistry & cell biology","confidence":"Medium","confidence_rationale":"Tier 3 / Moderate — deletion mapping and yeast two-hybrid for domain-interaction, co-localization supporting functional link, two orthogonal methods","pmids":["15833274"],"is_preprint":false},{"year":2005,"finding":"The N-terminal region (amino acids 412–781) of ZFP106 interacts with TSPYL (a nucleosome assembly protein family member) and is recruited to TSPYL-positive nucleoplasmic bodies; this recruitment requires a TSPYL domain absent in the mutant protein associated with sudden infant death syndrome.","method":"Yeast two-hybrid, domain deletion analysis, co-localization","journal":"The international journal of biochemistry & cell biology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — yeast two-hybrid plus co-localization, single lab, no in vivo or biochemical reconstitution","pmids":["15833274"],"is_preprint":false},{"year":2004,"finding":"ZFP106 gene expression is driven by two distinct promoters: a ubiquitous TATA-less CpG island promoter (P1) regulated by NRF-1, and a muscle-specific TATA box-containing promoter (P2) activated by myogenin binding to three critical E-boxes; SH3BP3 (previously described as a separate gene) corresponds to a rare alternatively spliced P2 transcript.","method":"5'-RACE, promoter deletion analysis, mutagenesis of NRF-1 binding site, dominant-negative NRF-1 transfection, in situ hybridization, myogenin binding assay","journal":"Gene","confidence":"High","confidence_rationale":"Tier 1 / Moderate — multiple orthogonal methods including mutagenesis, dominant-negative, RACE, in situ hybridization, single lab","pmids":["15656981"],"is_preprint":false},{"year":1998,"finding":"The H3a (Zfp106) gene encodes a 1888-amino acid protein with three zinc fingers and a beta-transducin (WD40) domain; allelic variants encode an H2-Db-binding nonamer peptide that mediates cytotoxic T cell responses, establishing ZFP106 as the gene underlying the mouse H3 minor histocompatibility complex.","method":"Positional cloning, CTL-based selection, peptide binding assays, protein domain analysis","journal":"Immunity","confidence":"High","confidence_rationale":"Tier 1 / Moderate — positional cloning with functional CTL validation and domain characterization, rigorous genetic and biochemical approach","pmids":["9846490"],"is_preprint":false},{"year":2017,"finding":"ZFP106 is identified as a novel substrate for CBP-mediated acetylation; the disordered linker region ID3 of CBP transiently interacts with an intrinsically disordered region (IDR) of ZFP106, maintaining disorder in both regions.","method":"Yeast two-hybrid screening, NMR spectroscopy, cross-linking experiments, competition-binding assays","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 1–2 / Weak — NMR and cross-linking providing structural-level interaction data, single lab, but acetylation itself not directly demonstrated in the abstract beyond substrate identification","pmids":["28680062"],"is_preprint":false},{"year":2024,"finding":"Zfp106 binds RNA G-quadruplexes and causes a conformational change in the G-quadruplex structure formed by GGGGCC repeats; Zfp106 inhibits formation of RNA foci and significantly reduces RAN translation (including DPR protein levels) caused by GGGGCC repeats in cultured mammalian cells and C9orf72 patient-derived cells.","method":"RNA G-quadruplex binding assay, conformational change assay, RNA foci quantification, RAN translation reporter assay, patient-derived cell studies","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — direct biochemical G-quadruplex binding with conformational change, multiple cell-based functional assays, and patient-derived cell validation across orthogonal methods","pmids":["39042693"],"is_preprint":false}],"current_model":"ZNF106/ZFP106 is a nuclear zinc finger/WD40-domain RNA-binding protein that specifically binds GGGGCC RNA repeat G-quadruplexes (causing conformational changes), interacts with ALS-associated RNA-binding proteins TDP-43 and FUS, associates with the splicing factor RBM39 at nuclear speckles, and is required for motor and sensory neuron maintenance; its loss leads to aberrant Nogo/Rtn4 pre-mRNA splicing, ectopic NOGO-A expression, and neuromuscular junction destabilization, while its expression is controlled by a dual promoter system regulated by NRF-1 (ubiquitous) and myogenin (muscle-specific), and it serves as a substrate for CBP-mediated acetylation."},"narrative":{"mechanistic_narrative":"ZNF106 (ZFP106) is a nuclear zinc finger/WD40-domain protein required for the maintenance of motor and sensory neurons, where its loss in mice produces selective motor and sensory neuronal degeneration that is rescued by motor-neuron-specific restoration of the protein [PMID:28072389, PMID:26604141]. Mechanistically, ZNF106 is an RNA-binding protein that specifically binds GGGGCC repeat RNA and associates with the ALS-linked RNA-binding proteins TDP-43 and FUS [PMID:28072389]. It binds the G-quadruplex structures formed by these repeats and induces a conformational change, thereby inhibiting RNA foci formation and suppressing RAN translation of dipeptide repeat proteins in patient-derived C9orf72 cells, and it suppresses GGGGCC-induced neurotoxicity in a Drosophila model [PMID:28072389, PMID:39042693]. ZNF106 functions in nuclear RNA processing compartments: it associates with the splicing factor RBM39 at nuclear speckles and relocalizes to the nucleolus when pre-mRNA synthesis is blocked [PMID:27418600], and its disruption causes aberrant splicing of the Nogo/Rtn4 locus with ectopic NOGO-A expression that destabilizes neuromuscular junctions [PMID:27418600]. The gene was originally identified as the mouse H3 minor histocompatibility locus and is transcribed from a dual promoter system, a ubiquitous NRF-1-regulated promoter and a muscle-specific myogenin-activated promoter [PMID:15656981, PMID:9846490].","teleology":[{"year":1998,"claim":"Established the molecular identity of the gene by positional cloning, defining its domain architecture and an unexpected role as the mouse H3 minor histocompatibility antigen.","evidence":"Positional cloning with CTL-based selection, peptide binding assays, and domain analysis","pmids":["9846490"],"confidence":"High","gaps":["Did not address the protein's biochemical or RNA-related function","Functional role of the zinc finger and WD40 domains undefined"]},{"year":2004,"claim":"Resolved how ZNF106 expression is controlled, showing distinct ubiquitous and muscle-specific transcriptional programs.","evidence":"5'-RACE, promoter deletion, NRF-1 site mutagenesis, dominant-negative NRF-1, and myogenin binding assays","pmids":["15656981"],"confidence":"High","gaps":["Does not link transcriptional control to protein function","Physiological consequence of muscle-specific isoform unknown"]},{"year":2005,"claim":"Mapped domain-specific subnuclear targeting, attributing nucleolar localization to the WD40 region and nucleoplasmic body recruitment to an N-terminal region.","evidence":"Deletion analysis, yeast two-hybrid, and co-localization for TSG118 and TSPYL interactions","pmids":["15833274"],"confidence":"Medium","gaps":["TSPYL interaction supported only by yeast two-hybrid and co-localization (Low confidence)","No biochemical reconstitution of either interaction","Functional significance of nucleolar targeting unresolved"]},{"year":2015,"claim":"Demonstrated a cell-intrinsic requirement for ZNF106 in neuronal survival and uncovered a mitochondrial bioenergetic deficit accompanying degeneration.","evidence":"Zfp106 knockout mouse characterization and Complex I activity assay in embryonic motor neurons","pmids":["26604141"],"confidence":"Medium","gaps":["Whether the Complex I defect is causal or secondary is unresolved","Single method for the mitochondrial phenotype","Molecular link between ZNF106 and Complex I not defined"]},{"year":2015,"claim":"Placed ZNF106 at the rDNA promoter as a factor targeting RNA Pol I, implicating it in ribosomal RNA transcription.","evidence":"ePICh chromatin enrichment proteomics at the ribosomal RNA gene promoter","pmids":["25812914"],"confidence":"Medium","gaps":["Limited functional follow-up on Pol I regulation","Mechanism of Pol I recruitment unknown","Single lab, single method"]},{"year":2016,"claim":"Connected ZNF106 to pre-mRNA splicing machinery and identified a downstream splicing defect explaining neuromuscular junction destabilization.","evidence":"Co-IP with RBM39, immunofluorescence/fractionation, transcription-inhibition relocalization, and Nogo/Rtn4 splicing analysis in knockout muscle","pmids":["27418600"],"confidence":"Medium","gaps":["Direct role of ZNF106 in the splicing reaction not biochemically reconstituted","Single lab","Generality of splicing targets beyond Rtn4 unknown"]},{"year":2017,"claim":"Linked ZNF106 to C9orf72 ALS biology by identifying GGGGCC RNA binding, interactions with TDP-43 and FUS, and suppression of repeat toxicity in vivo.","evidence":"AP-MS, RNA binding assays, knockout/rescue in mice, and Drosophila repeat-toxicity suppression","pmids":["28072389","26604141"],"confidence":"High","gaps":["Mechanism by which RNA binding suppresses toxicity not fully resolved at this stage","Direct versus indirect interaction with TDP-43/FUS not dissected"]},{"year":2017,"claim":"Characterized ZNF106 as a substrate of CBP acetylation through a disorder-preserving interaction between intrinsically disordered regions.","evidence":"Yeast two-hybrid, NMR spectroscopy, cross-linking, and competition-binding assays","pmids":["28680062"],"confidence":"Medium","gaps":["Acetylation itself not directly demonstrated beyond substrate identification","Functional consequence of acetylation unknown","Single lab"]},{"year":2024,"claim":"Defined the biochemical mechanism of repeat-toxicity suppression: ZNF106 binds and conformationally remodels GGGGCC RNA G-quadruplexes to reduce foci and RAN translation.","evidence":"G-quadruplex binding and conformational assays, RNA foci quantification, RAN translation reporters, and C9orf72 patient-derived cells","pmids":["39042693"],"confidence":"High","gaps":["In vivo therapeutic efficacy not established","Structural basis of the conformational change not solved","Whether endogenous ZNF106 levels are sufficient for protection in patients unknown"]},{"year":null,"claim":"How ZNF106's roles in rRNA transcription, pre-mRNA splicing, mitochondrial function, and G-quadruplex remodeling integrate into a single mechanism of neuronal maintenance remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model connecting nucleolar, splicing, and RNA-repeat activities","No structure of ZNF106 or its RNA-bound complexes","Causal hierarchy between splicing defects, mitochondrial deficit, and neurodegeneration undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[0,12]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[6,9]}],"localization":[{"term_id":"GO:0005730","term_label":"nucleolus","supporting_discovery_ids":[3,7]},{"term_id":"GO:0005654","term_label":"nucleoplasm","supporting_discovery_ids":[3,8]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[3,7,8]}],"pathway":[{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[3,4]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[2,12]}],"complexes":[],"partners":["RBM39","TARDBP","FUS","CREBBP","TSPYL","NRF1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9H2Y7","full_name":"Zinc finger protein 106","aliases":["Zinc finger protein 474"],"length_aa":1883,"mass_kda":208.9,"function":"RNA-binding protein. Specifically binds to 5'-GGGGCC-3' sequence repeats in RNA. Essential for maintenance of peripheral motor neuron and skeletal muscle function. Required for normal expression and/or alternative splicing of a number of genes in spinal cord and skeletal muscle, including the neurite outgrowth inhibitor RTN4. Also contributes to normal mitochondrial respiratory function in motor neurons, via an unknown mechanism","subcellular_location":"Nucleus, nucleolus; Nucleus speckle","url":"https://www.uniprot.org/uniprotkb/Q9H2Y7/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/ZNF106","classification":"Not Classified","n_dependent_lines":24,"n_total_lines":1208,"dependency_fraction":0.019867549668874173},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[],"url":"https://opencell.sf.czbiohub.org/search/ZNF106","total_profiled":1310},"omim":[{"mim_id":"603988","title":"ZINC FINGER PROTEIN 106; ZNF106","url":"https://www.omim.org/entry/603988"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Approved","locations":[{"location":"Nucleoli","reliability":"Approved"},{"location":"Nucleoplasm","reliability":"Additional"},{"location":"Cytosol","reliability":"Additional"}],"tissue_specificity":"Group enriched","tissue_distribution":"Detected in all","driving_tissues":[{"tissue":"heart muscle","ntpm":164.3},{"tissue":"skeletal muscle","ntpm":367.4},{"tissue":"tongue","ntpm":435.1}],"url":"https://www.proteinatlas.org/search/ZNF106"},"hgnc":{"alias_symbol":["ZNF474","SH3BP3"],"prev_symbol":["ZFP106"]},"alphafold":{"accession":"Q9H2Y7","domains":[{"cath_id":"2.130.10.10","chopping":"1526-1815","consensus_level":"medium","plddt":90.4974,"start":1526,"end":1815},{"cath_id":"-","chopping":"1816-1883","consensus_level":"medium","plddt":73.5243,"start":1816,"end":1883}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9H2Y7","model_url":"https://alphafold.ebi.ac.uk/files/AF-Q9H2Y7-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-Q9H2Y7-F1-predicted_aligned_error_v6.png","plddt_mean":44.56},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ZNF106","jax_strain_url":"https://www.jax.org/strain/search?query=ZNF106"},"sequence":{"accession":"Q9H2Y7","fasta_url":"https://rest.uniprot.org/uniprotkb/Q9H2Y7.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/Q9H2Y7/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/Q9H2Y7"}},"corpus_meta":[{"pmid":"28072389","id":"PMC_28072389","title":"Suppression of C9orf72 RNA repeat-induced neurotoxicity by the ALS-associated RNA-binding protein Zfp106.","date":"2017","source":"eLife","url":"https://pubmed.ncbi.nlm.nih.gov/28072389","citation_count":39,"is_preprint":false},{"pmid":"28680062","id":"PMC_28680062","title":"Linking functions: an additional role for an intrinsically disordered linker domain in the transcriptional coactivator CBP.","date":"2017","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/28680062","citation_count":37,"is_preprint":false},{"pmid":"27418600","id":"PMC_27418600","title":"Severe muscle wasting and denervation in mice lacking the RNA-binding protein ZFP106.","date":"2016","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/27418600","citation_count":35,"is_preprint":false},{"pmid":"9846490","id":"PMC_9846490","title":"Positional cloning and molecular characterization of an immunodominant cytotoxic determinant of the mouse H3 minor histocompatibility complex.","date":"1998","source":"Immunity","url":"https://pubmed.ncbi.nlm.nih.gov/9846490","citation_count":33,"is_preprint":false},{"pmid":"25812914","id":"PMC_25812914","title":"End-targeting proteomics of isolated chromatin segments of a mammalian ribosomal RNA gene promoter.","date":"2015","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/25812914","citation_count":32,"is_preprint":false},{"pmid":"15833274","id":"PMC_15833274","title":"Subcellular recruitment by TSG118 and TSPYL implicates a role for zinc finger protein 106 in a novel developmental pathway.","date":"2005","source":"The international journal of biochemistry & cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/15833274","citation_count":27,"is_preprint":false},{"pmid":"31909836","id":"PMC_31909836","title":"Genome-wide association study for growth and fatness traits in Chinese Sujiang pigs.","date":"2020","source":"Animal genetics","url":"https://pubmed.ncbi.nlm.nih.gov/31909836","citation_count":27,"is_preprint":false},{"pmid":"28106113","id":"PMC_28106113","title":"Genetic risk variants for metabolic traits in Arab populations.","date":"2017","source":"Scientific reports","url":"https://pubmed.ncbi.nlm.nih.gov/28106113","citation_count":24,"is_preprint":false},{"pmid":"26604141","id":"PMC_26604141","title":"Deficiency of the zinc finger protein ZFP106 causes motor and sensory neurodegeneration.","date":"2015","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/26604141","citation_count":17,"is_preprint":false},{"pmid":"36936414","id":"PMC_36936414","title":"Genome-wide association study for the primary feather color trait in a native Chinese duck.","date":"2023","source":"Frontiers in genetics","url":"https://pubmed.ncbi.nlm.nih.gov/36936414","citation_count":15,"is_preprint":false},{"pmid":"28111977","id":"PMC_28111977","title":"Genome-wide analysis of DNA methylation and their associations with long noncoding RNA/mRNA expression in non-small-cell lung cancer.","date":"2017","source":"Epigenomics","url":"https://pubmed.ncbi.nlm.nih.gov/28111977","citation_count":14,"is_preprint":false},{"pmid":"15656981","id":"PMC_15656981","title":"Dual promoter structure of ZFP106: regulation by myogenin and nuclear respiratory factor-1.","date":"2004","source":"Gene","url":"https://pubmed.ncbi.nlm.nih.gov/15656981","citation_count":11,"is_preprint":false},{"pmid":"39042693","id":"PMC_39042693","title":"Zfp106 binds to G-quadruplex RNAs and inhibits RAN translation and formation of RNA foci caused by G4C2 repeats.","date":"2024","source":"Proceedings of the National Academy of Sciences of the United States of America","url":"https://pubmed.ncbi.nlm.nih.gov/39042693","citation_count":10,"is_preprint":false},{"pmid":"35524909","id":"PMC_35524909","title":"Modification of alternative splicing in bovine somatic cell nuclear transfer embryos using engineered CRISPR-Cas13d.","date":"2022","source":"Science China. Life sciences","url":"https://pubmed.ncbi.nlm.nih.gov/35524909","citation_count":9,"is_preprint":false},{"pmid":"27010211","id":"PMC_27010211","title":"Genome-Wide Analysis in Swine Associates Corneal Graft Rejection with Donor-Recipient Mismatches in Three Novel Histocompatibility Regions and One Locus Homologous to the Mouse H-3 Locus.","date":"2016","source":"PloS one","url":"https://pubmed.ncbi.nlm.nih.gov/27010211","citation_count":9,"is_preprint":false},{"pmid":"33427755","id":"PMC_33427755","title":"Whole-exome Sequencing Identifies SLC52A1 and ZNF106 Variants as Novel Genetic Risk Factors for (Early) Multiple-organ Failure in Acute Pancreatitis.","date":"2021","source":"Annals of surgery","url":"https://pubmed.ncbi.nlm.nih.gov/33427755","citation_count":7,"is_preprint":false},{"pmid":"40141237","id":"PMC_40141237","title":"Identification of Novel Genetic Variants and Food Intake Factors Associated with Type 2 Diabetes in South Korean Adults, Using an Illness-Death Model.","date":"2025","source":"International journal of molecular sciences","url":"https://pubmed.ncbi.nlm.nih.gov/40141237","citation_count":3,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":10428,"output_tokens":2912,"usd":0.037482,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":10315,"output_tokens":3123,"usd":0.064825,"stage2_stop_reason":"end_turn"},"total_usd":0.102307,"stage1_batch_id":"msgbatch_01UT1AahFPCAyn2uVweS7A9z","stage2_batch_id":"msgbatch_01HuKWtKNT4Pqj1bc8eEP5RV","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2017,\n      \"finding\": \"Zfp106 specifically binds GGGGCC RNA repeats and interacts with multiple RNA-binding proteins including the ALS-associated factors TDP-43 and FUS, as identified by affinity purification-mass spectrometry.\",\n      \"method\": \"Affinity purification-mass spectrometry (AP-MS), RNA binding assay\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal AP-MS identifying specific binding partners, RNA binding assay, with functional validation in Drosophila model and mouse KO\",\n      \"pmids\": [\"28072389\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Zfp106 knockout mice develop severe motor neuron degeneration, which is rescued by transgenic restoration of Zfp106 specifically in motor neurons, establishing a cell-autonomous requirement of Zfp106 in motor neuron survival.\",\n      \"method\": \"Transgenic mouse rescue experiment (motor neuron-specific restoration), knockout mouse phenotype\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic rescue experiment in vivo with cell-type specificity, replicated across two independent knockout studies (PMID 28072389 and 26604141)\",\n      \"pmids\": [\"28072389\", \"26604141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"Zfp106 potently suppresses GGGGCC repeat-induced neurotoxicity in a Drosophila model of C9orf72 ALS.\",\n      \"method\": \"Drosophila genetic model of C9orf72 ALS with Zfp106 overexpression\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vivo functional suppression in Drosophila model, single lab but consistent with mouse KO data\",\n      \"pmids\": [\"28072389\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"ZFP106 associates with the core splicing factor RBM39 and localizes to nuclear speckles adjacent to spliceosomes; upon inhibition of pre-mRNA synthesis, ZFP106 translocates with other splicing factors to the nucleolus.\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence/subcellular fractionation, live-cell imaging upon transcription inhibition\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2–3 / Moderate — co-IP plus direct localization experiments with functional context (splicing/transcription inhibition), single lab\",\n      \"pmids\": [\"27418600\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"Genetic disruption of Zfp106 in mice results in altered splicing of the Nogo (Rtn4) gene locus in skeletal muscle, causing ectopic expression of NOGO-A, an inhibitor of nerve regeneration that destabilizes neuromuscular junctions.\",\n      \"method\": \"Zfp106 knockout mouse, RNA splicing analysis, protein expression analysis\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic knockout with defined molecular splicing readout and downstream pathway consequence, single lab\",\n      \"pmids\": [\"27418600\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"Zfp106-deficient mice display selective motor and sensory neuronal degeneration in spinal cord and peripheral nervous system, with embryonic Zfp106−/− motor neurons showing inhibition of mitochondrial Complex I within the electron transport chain.\",\n      \"method\": \"Zfp106 knockout mouse characterization, mitochondrial Complex I activity assay in embryonic motor neurons\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — direct enzymatic assay for Complex I in KO neurons, single lab, single method for the mitochondrial phenotype\",\n      \"pmids\": [\"26604141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"ZFP106 is identified as a novel factor that regulates transcription initiation by RNA Polymerase I at the ribosomal RNA gene promoter, targeting RNA Pol I to the promoter.\",\n      \"method\": \"ePICh (end-targeting proteomics of isolated chromatin segments), chromatin affinity capture\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Weak — novel chromatin enrichment method with proteomics identification at a specific locus, single lab, limited functional follow-up reported in abstract\",\n      \"pmids\": [\"25812914\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"The C-terminal WD40 repeat region of ZFP106 is required for nucleolar targeting; this domain interacts with TSG118, which co-localizes with ZFP106 in the nucleolus, and TSG118 downregulation during terminal differentiation coincides with loss of nucleolar ZFP106.\",\n      \"method\": \"Deletion analysis, yeast two-hybrid, co-localization by immunofluorescence, co-expression studies\",\n      \"journal\": \"The international journal of biochemistry & cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 3 / Moderate — deletion mapping and yeast two-hybrid for domain-interaction, co-localization supporting functional link, two orthogonal methods\",\n      \"pmids\": [\"15833274\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2005,\n      \"finding\": \"The N-terminal region (amino acids 412–781) of ZFP106 interacts with TSPYL (a nucleosome assembly protein family member) and is recruited to TSPYL-positive nucleoplasmic bodies; this recruitment requires a TSPYL domain absent in the mutant protein associated with sudden infant death syndrome.\",\n      \"method\": \"Yeast two-hybrid, domain deletion analysis, co-localization\",\n      \"journal\": \"The international journal of biochemistry & cell biology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — yeast two-hybrid plus co-localization, single lab, no in vivo or biochemical reconstitution\",\n      \"pmids\": [\"15833274\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"ZFP106 gene expression is driven by two distinct promoters: a ubiquitous TATA-less CpG island promoter (P1) regulated by NRF-1, and a muscle-specific TATA box-containing promoter (P2) activated by myogenin binding to three critical E-boxes; SH3BP3 (previously described as a separate gene) corresponds to a rare alternatively spliced P2 transcript.\",\n      \"method\": \"5'-RACE, promoter deletion analysis, mutagenesis of NRF-1 binding site, dominant-negative NRF-1 transfection, in situ hybridization, myogenin binding assay\",\n      \"journal\": \"Gene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — multiple orthogonal methods including mutagenesis, dominant-negative, RACE, in situ hybridization, single lab\",\n      \"pmids\": [\"15656981\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1998,\n      \"finding\": \"The H3a (Zfp106) gene encodes a 1888-amino acid protein with three zinc fingers and a beta-transducin (WD40) domain; allelic variants encode an H2-Db-binding nonamer peptide that mediates cytotoxic T cell responses, establishing ZFP106 as the gene underlying the mouse H3 minor histocompatibility complex.\",\n      \"method\": \"Positional cloning, CTL-based selection, peptide binding assays, protein domain analysis\",\n      \"journal\": \"Immunity\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — positional cloning with functional CTL validation and domain characterization, rigorous genetic and biochemical approach\",\n      \"pmids\": [\"9846490\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"ZFP106 is identified as a novel substrate for CBP-mediated acetylation; the disordered linker region ID3 of CBP transiently interacts with an intrinsically disordered region (IDR) of ZFP106, maintaining disorder in both regions.\",\n      \"method\": \"Yeast two-hybrid screening, NMR spectroscopy, cross-linking experiments, competition-binding assays\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Weak — NMR and cross-linking providing structural-level interaction data, single lab, but acetylation itself not directly demonstrated in the abstract beyond substrate identification\",\n      \"pmids\": [\"28680062\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Zfp106 binds RNA G-quadruplexes and causes a conformational change in the G-quadruplex structure formed by GGGGCC repeats; Zfp106 inhibits formation of RNA foci and significantly reduces RAN translation (including DPR protein levels) caused by GGGGCC repeats in cultured mammalian cells and C9orf72 patient-derived cells.\",\n      \"method\": \"RNA G-quadruplex binding assay, conformational change assay, RNA foci quantification, RAN translation reporter assay, patient-derived cell studies\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — direct biochemical G-quadruplex binding with conformational change, multiple cell-based functional assays, and patient-derived cell validation across orthogonal methods\",\n      \"pmids\": [\"39042693\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ZNF106/ZFP106 is a nuclear zinc finger/WD40-domain RNA-binding protein that specifically binds GGGGCC RNA repeat G-quadruplexes (causing conformational changes), interacts with ALS-associated RNA-binding proteins TDP-43 and FUS, associates with the splicing factor RBM39 at nuclear speckles, and is required for motor and sensory neuron maintenance; its loss leads to aberrant Nogo/Rtn4 pre-mRNA splicing, ectopic NOGO-A expression, and neuromuscular junction destabilization, while its expression is controlled by a dual promoter system regulated by NRF-1 (ubiquitous) and myogenin (muscle-specific), and it serves as a substrate for CBP-mediated acetylation.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ZNF106 (ZFP106) is a nuclear zinc finger/WD40-domain protein required for the maintenance of motor and sensory neurons, where its loss in mice produces selective motor and sensory neuronal degeneration that is rescued by motor-neuron-specific restoration of the protein [#1, #5]. Mechanistically, ZNF106 is an RNA-binding protein that specifically binds GGGGCC repeat RNA and associates with the ALS-linked RNA-binding proteins TDP-43 and FUS [#0]. It binds the G-quadruplex structures formed by these repeats and induces a conformational change, thereby inhibiting RNA foci formation and suppressing RAN translation of dipeptide repeat proteins in patient-derived C9orf72 cells, and it suppresses GGGGCC-induced neurotoxicity in a Drosophila model [#2, #12]. ZNF106 functions in nuclear RNA processing compartments: it associates with the splicing factor RBM39 at nuclear speckles and relocalizes to the nucleolus when pre-mRNA synthesis is blocked [#3], and its disruption causes aberrant splicing of the Nogo/Rtn4 locus with ectopic NOGO-A expression that destabilizes neuromuscular junctions [#4]. The gene was originally identified as the mouse H3 minor histocompatibility locus and is transcribed from a dual promoter system, a ubiquitous NRF-1-regulated promoter and a muscle-specific myogenin-activated promoter [#9, #10].\",\n  \"teleology\": [\n    {\n      \"year\": 1998,\n      \"claim\": \"Established the molecular identity of the gene by positional cloning, defining its domain architecture and an unexpected role as the mouse H3 minor histocompatibility antigen.\",\n      \"evidence\": \"Positional cloning with CTL-based selection, peptide binding assays, and domain analysis\",\n      \"pmids\": [\"9846490\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not address the protein's biochemical or RNA-related function\", \"Functional role of the zinc finger and WD40 domains undefined\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Resolved how ZNF106 expression is controlled, showing distinct ubiquitous and muscle-specific transcriptional programs.\",\n      \"evidence\": \"5'-RACE, promoter deletion, NRF-1 site mutagenesis, dominant-negative NRF-1, and myogenin binding assays\",\n      \"pmids\": [\"15656981\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Does not link transcriptional control to protein function\", \"Physiological consequence of muscle-specific isoform unknown\"]\n    },\n    {\n      \"year\": 2005,\n      \"claim\": \"Mapped domain-specific subnuclear targeting, attributing nucleolar localization to the WD40 region and nucleoplasmic body recruitment to an N-terminal region.\",\n      \"evidence\": \"Deletion analysis, yeast two-hybrid, and co-localization for TSG118 and TSPYL interactions\",\n      \"pmids\": [\"15833274\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"TSPYL interaction supported only by yeast two-hybrid and co-localization (Low confidence)\", \"No biochemical reconstitution of either interaction\", \"Functional significance of nucleolar targeting unresolved\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Demonstrated a cell-intrinsic requirement for ZNF106 in neuronal survival and uncovered a mitochondrial bioenergetic deficit accompanying degeneration.\",\n      \"evidence\": \"Zfp106 knockout mouse characterization and Complex I activity assay in embryonic motor neurons\",\n      \"pmids\": [\"26604141\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether the Complex I defect is causal or secondary is unresolved\", \"Single method for the mitochondrial phenotype\", \"Molecular link between ZNF106 and Complex I not defined\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Placed ZNF106 at the rDNA promoter as a factor targeting RNA Pol I, implicating it in ribosomal RNA transcription.\",\n      \"evidence\": \"ePICh chromatin enrichment proteomics at the ribosomal RNA gene promoter\",\n      \"pmids\": [\"25812914\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Limited functional follow-up on Pol I regulation\", \"Mechanism of Pol I recruitment unknown\", \"Single lab, single method\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Connected ZNF106 to pre-mRNA splicing machinery and identified a downstream splicing defect explaining neuromuscular junction destabilization.\",\n      \"evidence\": \"Co-IP with RBM39, immunofluorescence/fractionation, transcription-inhibition relocalization, and Nogo/Rtn4 splicing analysis in knockout muscle\",\n      \"pmids\": [\"27418600\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct role of ZNF106 in the splicing reaction not biochemically reconstituted\", \"Single lab\", \"Generality of splicing targets beyond Rtn4 unknown\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Linked ZNF106 to C9orf72 ALS biology by identifying GGGGCC RNA binding, interactions with TDP-43 and FUS, and suppression of repeat toxicity in vivo.\",\n      \"evidence\": \"AP-MS, RNA binding assays, knockout/rescue in mice, and Drosophila repeat-toxicity suppression\",\n      \"pmids\": [\"28072389\", \"26604141\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which RNA binding suppresses toxicity not fully resolved at this stage\", \"Direct versus indirect interaction with TDP-43/FUS not dissected\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Characterized ZNF106 as a substrate of CBP acetylation through a disorder-preserving interaction between intrinsically disordered regions.\",\n      \"evidence\": \"Yeast two-hybrid, NMR spectroscopy, cross-linking, and competition-binding assays\",\n      \"pmids\": [\"28680062\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Acetylation itself not directly demonstrated beyond substrate identification\", \"Functional consequence of acetylation unknown\", \"Single lab\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Defined the biochemical mechanism of repeat-toxicity suppression: ZNF106 binds and conformationally remodels GGGGCC RNA G-quadruplexes to reduce foci and RAN translation.\",\n      \"evidence\": \"G-quadruplex binding and conformational assays, RNA foci quantification, RAN translation reporters, and C9orf72 patient-derived cells\",\n      \"pmids\": [\"39042693\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"In vivo therapeutic efficacy not established\", \"Structural basis of the conformational change not solved\", \"Whether endogenous ZNF106 levels are sufficient for protection in patients unknown\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How ZNF106's roles in rRNA transcription, pre-mRNA splicing, mitochondrial function, and G-quadruplex remodeling integrate into a single mechanism of neuronal maintenance remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model connecting nucleolar, splicing, and RNA-repeat activities\", \"No structure of ZNF106 or its RNA-bound complexes\", \"Causal hierarchy between splicing defects, mitochondrial deficit, and neurodegeneration undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [0, 12]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [6, 9]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005730\", \"supporting_discovery_ids\": [3, 7]},\n      {\"term_id\": \"GO:0005654\", \"supporting_discovery_ids\": [3, 8]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [3, 7, 8]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [3, 4]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [2, 12]}\n    ],\n    \"complexes\": [],\n    \"partners\": [\"RBM39\", \"TARDBP\", \"FUS\", \"CREBBP\", \"TSPYL\", \"NRF1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":5,"faith_total":5,"faith_pct":100.0}}