{"gene":"FUS","run_date":"2026-06-09T23:54:44","timeline":{"discoveries":[{"year":1997,"finding":"TLS/FUS binds RNA in vivo (demonstrated by in vivo UV crosslinking) and undergoes rapid nucleocytoplasmic shuttling (demonstrated by interspecific heterokaryons and cytoplasmic antibody trapping). The RRM domain was found dispensable for in vivo RNA binding, suggesting predominantly non-sequence-specific interactions. Cellular fractionation showed TLS binds RNA in both nucleus and cytoplasm, consistent with an hnRNP-like chaperone function.","method":"In vivo UV crosslinking, interspecific heterokaryon assay, cytoplasmic antibody injection, cellular fractionation","journal":"Journal of cell science","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal methods (UV crosslinking, heterokaryon, antibody trapping, fractionation) in a single focused mechanistic study","pmids":["9264461"],"is_preprint":false},{"year":1994,"finding":"The TLS/FUS protein binds RNA in vitro with preferential binding to poly-G, requiring both amino- and carboxy-terminal RNA-binding motifs. The TLS/FUS N-terminal fusion domain (TFD) in the TLS-ERG chimeric protein functions as a transcriptional activation domain, replacing the ERG N-terminal activation domain, as shown by mutational analysis.","method":"In vitro RNA binding assay, mutational analysis of fusion protein, transactivation reporter assays","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 1–2 / Moderate — in vitro binding and mutagenesis in a single lab study","pmids":["7970732"],"is_preprint":false},{"year":2000,"finding":"TLS/FUS binds RNA polymerase II through its N-terminal domain and recruits serine-arginine (SR) splicing factors through its C-terminal domain. The TLS-ERG leukemia fusion protein retains RNA Pol II binding but loses SR protein recruitment due to replacement of the C-terminus, leading to inhibition of SR-mediated pre-mRNA splicing and altered CD44 splicing in stable K562 cell lines.","method":"Co-immunoprecipitation, transient transfection splicing assays, stable cell line expression, CD44 splicing analysis","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal interactions shown, functional splicing consequence demonstrated with multiple approaches in same study","pmids":["10779324"],"is_preprint":false},{"year":2000,"finding":"Expression of the FUS/TLS-CHOP fusion transgene in mice specifically induces liposarcomas with characteristic lipoblast morphology, intracellular lipid accumulation, induction of adipocyte-specific genes, and high PPARgamma expression, establishing FUS-CHOP overexpression as a key determinant of liposarcoma.","method":"Transgenic mouse model with EF1alpha-driven FUS-CHOP expression, histological and gene expression analysis","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo genetic model with defined phenotypic readout and molecular characterization","pmids":["10828883"],"is_preprint":false},{"year":2000,"finding":"The FUS/TLS domain of FUS-CHOP is required for liposarcoma initiation: transgenic mice expressing CHOP alone (without FUS domain) do not develop tumors, while mice expressing inverted CHOP-FUS (FUS domain fused to C-terminus of CHOP) do develop liposarcomas, establishing a specific and critical role for the FUS domain in transformation.","method":"Transgenic mouse models comparing FUS-CHOP, CHOP alone, and inverted CHOP-FUS constructs","journal":"Oncogene","confidence":"High","confidence_rationale":"Tier 2 / Strong — genetic domain-swap experiment with clear positive and negative controls in vivo","pmids":["11146553"],"is_preprint":false},{"year":2004,"finding":"Structural analysis of human TLS/FUS by limited proteolysis, CD, and NMR revealed that the RRM and zinc finger-like domains form protease-resistant core structures while the RGG repeat regions are unstructured. NMR chemical shift perturbation showed that the zinc finger domain (not the RRM) binds GGUG-containing RNA with Kd ~10^-5 M, suggesting the zinc finger plays a predominant role in RNA recognition.","method":"Limited proteolysis, MALDI-TOF MS, circular dichroism, NMR spectroscopy (113Cd NMR, amide chemical shift perturbation)","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct structural and binding measurements with multiple biophysical methods in a focused study","pmids":["15299008"],"is_preprint":false},{"year":2008,"finding":"FUS/TLS is phosphorylated at Ser42 in vivo primarily in response to DNA double-strand breaks, with this phosphorylation requiring ATM (not DNA-PK) as established by kinase-specific inhibition and in vitro PIKK phosphorylation assays. Phospho-specific antibodies confirmed in vivo DSB-induced phosphorylation.","method":"DNA-affinity chromatography, in vitro kinase assay, phospho-specific antibody generation and western blotting, ATM inhibitor experiments","journal":"The Biochemical journal","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — in vitro kinase assay combined with in vivo pharmacological dissection and phospho-specific antibody validation","pmids":["18620545"],"is_preprint":false},{"year":2009,"finding":"Mutations in FUS/TLS cause its abnormal accumulation in the cytoplasm of neurons (instead of the normal predominantly nuclear localization), identified in familial ALS patients with 13 distinct FUS/TLS mutations.","method":"Genetic sequencing of familial ALS patients, immunohistochemistry and cellular localization analysis of mutant vs. wild-type FUS in neurons","journal":"Science (New York, N.Y.)","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple independent mutations shown to alter subcellular localization, replicated across multiple families","pmids":["19251627"],"is_preprint":false},{"year":2010,"finding":"TLS/FUS represses RNA polymerase III transcription from all three classes of RNAP III promoters in vitro and associates with RNAP III genes in vivo, possibly via direct interaction with TBP. siRNA depletion of TLS increased RNAP III transcript levels and RNAP III/TBP occupancy at target genes; overexpression decreased RNAP III transcripts.","method":"In vitro transcription assay, ChIP, siRNA knockdown with RT-qPCR, overexpression studies","journal":"Molecular and cellular biology","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — in vitro reconstitution plus in vivo ChIP and loss/gain of function, multiple orthogonal methods","pmids":["19841068"],"is_preprint":false},{"year":2012,"finding":"FUS associates with the SMN complex, mediated by U1 snRNP and by direct protein-protein interactions between FUS and SMN. FUS is required for Gems (Cajal body-related nuclear structures) formation in HeLa cells; ALS-causing FUS mutation R495X also results in Gem loss. Reduction in Gems was observed in ALS patient fibroblasts expressing mutant FUS or TDP-43.","method":"Co-immunoprecipitation, direct interaction assays, immunofluorescence/Gem counting, patient fibroblast analysis","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal co-IP, direct interaction, functional cellular readout, and patient tissue validation","pmids":["23022481"],"is_preprint":false},{"year":2012,"finding":"HITS-CLIP analysis in mouse cerebrum revealed that FUS binding sites tend to form stable secondary structures, that FUS binds scattered sites around alternatively spliced exons (including MAPT, CAMK2A, FMR1), and that FUS binding to promoter antisense strands downregulates coding-strand transcription in a position-dependent manner.","method":"HITS-CLIP, exon arrays in mouse cortical neurons, bioinformatic analysis","journal":"Scientific reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — transcriptome-wide binding map with functional correlation, single lab","pmids":["22829983"],"is_preprint":false},{"year":2013,"finding":"FUS interacts directly with HDAC1, and this interaction is required for FUS recruitment to DNA double-strand break sites and proper DDR signaling. ALS-mutant FUS proteins show diminished interaction with HDAC1 and are defective in DDR and DNA repair.","method":"Co-immunoprecipitation (FUS-HDAC1), live-cell imaging of FUS recruitment to DSB sites, DNA damage repair assays, patient tissue analysis","journal":"Nature neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct protein interaction, functional DSB recruitment assay, ALS mutant characterization, and patient validation — multiple orthogonal methods","pmids":["24036913"],"is_preprint":false},{"year":2013,"finding":"RNA binding nucleates the formation of higher-order FUS ribonucleoprotein assemblies that bind the CTD of RNA polymerase II in an RNA-dependent manner, affecting Ser2 phosphorylation and transcription. Both the low-complexity domain and the RGG-rich domain contribute to assembly. The assemblies appear fibrous by electron microscopy with characteristics of β-zipper structures.","method":"Biochemical assembly assays, electron microscopy, RNA Pol II CTD binding assays, phosphorylation analysis","journal":"Cell reports","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — reconstitution-style assembly assay, structural (EM) characterization, functional Pol II CTD interaction","pmids":["24268778"],"is_preprint":false},{"year":2013,"finding":"ALS-linked mutant FUS alters stress granule dynamics: it delays stress granule assembly but once formed, stress granules containing mutant FUS are larger, more dynamic, and more abundant. The RGG domains of FUS are required for its incorporation into stress granules. Arginine methylation within RGG domains does not modulate FUS incorporation into stress granules.","method":"Live-cell fluorescence imaging, stress granule assembly/disassembly kinetics, domain deletion analysis, methyltransferase inhibitor treatment","journal":"Molecular neurodegeneration","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — quantitative live imaging with domain mutants, single lab study","pmids":["24090136"],"is_preprint":false},{"year":2013,"finding":"FUS autoregulates its own protein levels by binding to exon 7 and flanking introns of its own pre-mRNA, repressing exon 7 splicing and promoting nonsense-mediated decay of the exon 7-skipped isoform. ALS mutations causing cytoplasmic FUS mislocalization (R521G, R522G, ΔExon15) show progressively impaired exon 7 repression and autoregulation, correlating with degree of cytoplasmic mislocalization.","method":"FUS CLIP-seq, splicing reporter assays, siRNA knockdown/rescue, overexpression, antisense oligonucleotides","journal":"PLoS genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — CLIP-seq binding map with functional splicing assays, knockdown/rescue, ALS mutant series, multiple orthogonal methods","pmids":["24204307"],"is_preprint":false},{"year":2013,"finding":"FUS is a prosurvival factor during hyperosmolar stress. Endogenous FUS redistributes from nucleus to cytoplasm and incorporates into stress granules specifically in response to sorbitol (not other stressors like arsenite, H2O2, thapsigargin, or heat shock). This cytoplasmic redistribution is modulated by methyltransferase activity but methyltransferase inhibition does not affect SG incorporation. FUS-depleted cells show reduced viability under hyperosmolar stress.","method":"Immunofluorescence localization, methyltransferase inhibitors, siRNA knockdown, cell viability assays","journal":"Journal of cellular physiology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct localization imaging with functional viability readout, single lab","pmids":["23625794"],"is_preprint":false},{"year":2014,"finding":"DNA damage (double-strand breaks induced by calicheamicin γ1) causes cytoplasmic translocation of FUS mediated by phosphorylation of its N-terminus by DNA-dependent protein kinase (DNA-PK). This mechanism is distinct from ATM-mediated phosphorylation at Ser42. Cytoplasmic translocation of FUS after DNA damage also involves TAF15, EWS, and Transportin-1.","method":"Drug treatment (calicheamicin γ1), immunofluorescence, phosphorylation mapping, DNA-PK inhibitor experiments, primary human neurons and astrocytes","journal":"The Journal of neuroscience","confidence":"High","confidence_rationale":"Tier 2 / Strong — pharmacological dissection of kinase identity, multiple cell types including primary neurons, mechanistic phosphorylation mapping","pmids":["24899704"],"is_preprint":false},{"year":2014,"finding":"Nuclear FUS binds active chromatin, and this binding is required for FUS transcription activation (but not alternative splicing regulation). The N-terminal QGSY-rich region (aa 1-164) mediates FUS self-assembly in the mammalian nucleus, which is essential for chromatin binding and transcription activation. RNA binding is also required for FUS self-assembly and chromatin binding. ALS mutations dramatically decrease chromatin binding ability.","method":"Chromatin fractionation, ChIP, domain deletion mutants, transcription reporter assays, self-assembly assays, RNA-binding mutants","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple functional assays with domain mutants, single lab study","pmids":["25453086"],"is_preprint":false},{"year":2014,"finding":"FUS is a co-activator of androgen receptor (AR) in prostate cancer cells. Endogenous FUS co-immunoprecipitates with AR in LNCaP cells, FUS is recruited to the ARE III of the PSA gene enhancer by ChIP, and FUS overexpression enhances while FUS knockdown reduces AR transcriptional activity and androgen-dependent cell proliferation.","method":"Co-immunoprecipitation of endogenous proteins, ChIP, GAL4 transactivation assay, overexpression and siRNA knockdown","journal":"PloS one","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — reciprocal co-IP with endogenous proteins, ChIP, and functional gain/loss of function — single lab","pmids":["21909421"],"is_preprint":false},{"year":2014,"finding":"Activity-dependent regulation of FUS: activation of metabotropic glutamate receptors 1/5 in neocortical slices and synaptoneurosomes increases endogenous mouse FUS and FUS-WT protein levels but decreases FUS-R521G mutant protein, providing a biochemical basis for differential dendritic spine effects between WT and mutant FUS.","method":"Synaptoneurosomes preparation, mGluR1/5 pharmacological stimulation, western blotting","journal":"Proceedings of the National Academy of Sciences of the United States of America","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — biochemical fractionation with pharmacological stimulation, single lab, limited mechanistic follow-up","pmids":["25324524"],"is_preprint":false},{"year":2015,"finding":"FUS binds diverse RNA sequences without strong sequence specificity: all five previously proposed binding motifs bind with Kd values spanning only 10-fold, and some RNAs lacking these motifs bind with similar affinity. FUS binds RNA in a length-dependent manner consistent with a substantial non-specific component. FUS binds single-stranded DNA with ~3-fold lower affinity than ssRNA, and double-stranded nucleic acids bind more weakly.","method":"Quantitative in vitro RNA/DNA binding assays (filter binding, fluorescence polarization), systematic comparison of binding motifs","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 1 / Moderate — direct quantitative in vitro binding measurements across multiple substrates, single focused mechanistic study","pmids":["26150427"],"is_preprint":false},{"year":2016,"finding":"PINK1 and Parkin are genetic modifiers of FUS-induced neurodegeneration in Drosophila. Downregulating PINK1 or Parkin expression ameliorated FUS-induced neurodegeneration phenotypes. FUS overexpression elevated PINK1 and Parkin protein levels and increased ubiquitinylation of Miro1 (a Parkin E3 ligase substrate). FUS expression reduced mitochondrial axonal transport motility and processivity in motor neurons.","method":"Drosophila genetic modifier screen, western blotting, mitochondrial transport imaging, ubiquitination assays","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis in Drosophila with multiple mechanistic readouts, single lab","pmids":["27794540"],"is_preprint":false},{"year":2017,"finding":"FUS inclusions lead to mislocalization of specific RNAs from fibroblast cell protrusions and neuronal axons by sequestering kinesin-1 mRNA and protein within inclusions, causing loss of detyrosinated glutamate (Glu)-microtubules and failure of RNA localization. Dissolution of FUS inclusions with engineered Hsp104 disaggregases or kinesin-1 overexpression reverses these effects. Kinesin-1 affects MT detyrosination by targeting tubulin carboxypeptidase enzyme to specific MTs.","method":"Fluorescence microscopy of RNA localization, kinesin-1 co-recruitment analysis, Hsp104 disaggregase treatment, tubulin modification analysis, rescue experiments","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — mechanism established with multiple approaches including pharmacological rescue, domain mutants, and functional readouts across cell types","pmids":["28298410"],"is_preprint":false},{"year":2018,"finding":"FUS interacts with the core miRISC component AGO2 and is required for optimal microRNA-mediated gene silencing. FUS promotes silencing by binding to microRNA and mRNA targets (demonstrated for miR-200c and its target ZEB1). The ALS truncation mutant R495X impairs microRNA-mediated gene silencing. The C. elegans homolog fust-1 shares this conserved function.","method":"Co-immunoprecipitation (FUS-AGO2), RNA binding assays, reporter gene silencing assays, ALS mutant comparison, C. elegans genetic experiments","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — reciprocal co-IP, functional silencing assay, evolutionary conservation across species — multiple orthogonal methods","pmids":["29499134"],"is_preprint":false},{"year":2019,"finding":"Wild-type FUS protein binds to aberrantly retained introns within SFPQ transcripts that are exported from the nucleus into the cytoplasm, providing a mechanism for FUS nuclear-to-cytoplasmic mislocalization in ALS independent of FUS mutations.","method":"RNA immunoprecipitation, iPSC-derived motor neurons, transgenic mouse models, post-mortem ALS spinal cord analysis","journal":"Brain : a journal of neurology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct binding evidence in human and mouse models, single lab but multiple model systems","pmids":["31368485"],"is_preprint":false},{"year":2019,"finding":"Wild-type FUS preferentially binds introns in human motor neuron pre-mRNAs, while ALS mutation (studied in RNA interactome) causes a shift toward 3' UTR binding. ELAVL4 protein levels are increased in ALS-mutant FUS motor neurons; ELAVL4 and mutant FUS interact and co-localize in cytoplasmic speckles with altered biomechanical properties and in stress granules under oxidative stress.","method":"RNA interactome analysis (iCLIP), immunoprecipitation (FUS-ELAVL4), immunofluorescence, iPSC-derived motor neurons, post-mortem ALS spinal cord","journal":"Cell reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — iCLIP binding map plus protein interaction and co-localization, patient tissue validation — single lab","pmids":["31242416"],"is_preprint":false},{"year":2020,"finding":"FUS acetylation at K510 (in the nuclear localization sequence) disrupts its interaction with Transportin-1, causing cytoplasmic mislocalization and stress granule-like inclusion formation. Acetylation at K315/K316 (in the RNA recognition motif) reduces RNA binding and decreases cytoplasmic inclusion formation. CREB-binding protein/p300 acetylates FUS, while both sirtuins and HDACs contribute to FUS deacetylation. ALS patient fibroblasts show higher FUS K510 acetylation than controls.","method":"Acetylation site mapping, co-immunoprecipitation (FUS-Transportin-1), site-directed mutagenesis, immunofluorescence, HDAC inhibitor treatment, patient fibroblast analysis","journal":"Human molecular genetics","confidence":"High","confidence_rationale":"Tier 2 / Strong — modification site mapping, writer/eraser identification, functional mutagenesis, and patient validation — multiple orthogonal methods","pmids":["32691043"],"is_preprint":false},{"year":2020,"finding":"FUS associates with stalled polyribosomes in an mTOR-dependent manner: this association is increased by Torin1 (mTOR kinase inhibitor) or nutrient deprivation but not rapamycin. FUS is required for efficient translational stalling — FUS-deficient cells are refractory to mTOR inhibition-induced translation repression. ALS-linked mutants R521G and P525L associate abundantly with polyribosomes and decrease global protein synthesis; this effect requires RNA-binding by FUS.","method":"Polyribosome fractionation, Torin1/rapamycin treatment, FUS knockdown/knockout cells, metabolic labeling for translation, RNA-binding mutants","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — biochemical fractionation with pharmacological and genetic dissection, RNA-binding mutant validation — single lab","pmids":["33082139"],"is_preprint":false},{"year":2020,"finding":"FUS ALS-causative mutations induce widespread loss-of-function on splicing, specifically altering intron retention levels in RNA-binding proteins. An intron retention event in FUS itself is associated with its autoregulation and is altered by FUS mutations. This autoregulatory intron retention is also observed in other ALS-linked mutations (TDP-43, VCP, SOD1), suggesting a shared regulatory RNA network.","method":"High-depth RNA-seq on FUS knockin and knockout models, splicing analysis, comparison across ALS genetic models","journal":"Nucleic acids research","confidence":"High","confidence_rationale":"Tier 2 / Strong — isogenic knockin vs. knockout comparison with high-depth sequencing, multiple ALS genetic models validated","pmids":["32479602"],"is_preprint":false},{"year":2020,"finding":"EGF receptor (EGFR) phosphorylates FUS at specific tyrosine sites, promoting FUS nuclear translocation. Nuclear FUS binds to the collagen IV promoter, activating transcription. Integrin α1β1 prevents this pathway by inhibiting EGFR. A cell-penetrating peptide that inhibits FUS nuclear translocation reduces collagen IV transcription.","method":"Tyrosine phosphorylation analysis, EGFR inhibitor treatment, ChIP (FUS at collagen IV promoter), FUS mutagenesis, cell-penetrating peptide, Itga1-null cell comparison","journal":"The Journal of cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — phosphorylation mapping, ChIP, mutagenesis, and functional rescue — single lab","pmids":["32678881"],"is_preprint":false},{"year":2021,"finding":"ALS-mutant FUS condenses in axons and sequesters FMRP, promoting FMRP phase separation. This leads to repression of translation in mouse and human FUS-ALS motor neurons. FUS and FMRP co-partition in vitro and repress translation together. Translation of FMRP-bound RNAs is reduced in vivo in FUS-ALS motor neurons.","method":"Mouse and human iPSC-derived motor neuron models with endogenous knockin mutations, in vitro phase separation assays, translation assays, FMRP interaction studies","journal":"Science advances","confidence":"High","confidence_rationale":"Tier 2 / Strong — endogenous knockin models plus in vitro reconstitution, human iPSC validation, multiple orthogonal methods","pmids":["34290090"],"is_preprint":false},{"year":2021,"finding":"The FUS gene is dual-coding: an altORF nested in the FUS CDS encodes a conserved 170 amino acid protein (altFUS). altFUS (not FUS itself) is responsible for autophagy inhibition and is pivotal in mitochondrial potential loss and cytoplasmic aggregate accumulation induced by FUS overexpression. Suppression of altFUS in Drosophila protects against FUS-induced neurodegeneration.","method":"Ribosome profiling, altORF expression constructs, autophagy assays, mitochondrial membrane potential measurements, Drosophila genetics","journal":"EMBO reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple cellular assays and Drosophila genetic validation, single lab study","pmids":["33226175"],"is_preprint":false},{"year":2021,"finding":"Crystal structure of the Kapβ2 (Karyopherin-β2/Transportin-1)·FUS(P525L) PY-NLS complex revealed fewer contacts at the mutation site, explaining decreased Kapβ2 affinity. FUS(R495X), despite missing the PY-NLS, binds Kapβ2 via its RGG2 and RGG3 tandem regions competing at the PY-NLS binding site, enabling nuclear localization when arginine methylation is inhibited. Kapβ2 binding also suppresses FUS LLPS.","method":"Crystal structure determination, biochemical binding assays, cell-based nuclear localization experiments, methylation inhibitor treatment","journal":"Scientific reports","confidence":"High","confidence_rationale":"Tier 1 / Strong — crystal structure combined with biochemical and cell-based validation, mechanistic dissection of two distinct ALS mutants","pmids":["33580145"],"is_preprint":false},{"year":2022,"finding":"Poly(ADP-ribose) (PAR) triggers FUS condensation at 1 nM concentration (1000-fold lower than RNA), through a transient (not stable) interaction with FUS that drives FUS oligomerization. Unlike RNA which stably associates with FUS, PAR interacts transiently. PAR and RNA co-condense with FUS via distinct mechanisms. Inhibition of PARP5a diminishes FUS condensation in cells.","method":"Single-molecule fluorescence assays, condensate formation assays, PARP5a inhibitor treatment, biochemical binding kinetics","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 1–2 / Strong — quantitative single-molecule and biochemical assays distinguishing PAR vs RNA binding modes, pharmacological validation in cells","pmids":["35182479"],"is_preprint":false},{"year":2022,"finding":"The FUS::DDIT3 (FUS-CHOP) fusion oncoprotein in myxoid liposarcoma inhibits BAF (mSWI/SNF) complex-mediated chromatin remodeling at adipogenic enhancer sites by sequestering the adipogenic transcription factor CEBPB from the genome, generating a BAF complex loss-of-function phenotype without deleterious BAF subunit mutations.","method":"ChIP-seq, ATAC-seq, gene expression analysis, BAF ATPase inhibitor treatment, CEBPB co-IP, primary tumor genomics","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — genome-wide chromatin profiling, protein interaction, pharmacological inhibition, and primary tumor validation — multiple orthogonal methods","pmids":["35390276"],"is_preprint":false},{"year":2024,"finding":"Endogenous FUS localizes to mitochondria and interacts with mitochondrial DNA Ligase IIIα (mtLig3), recruiting it to DNA damage sites within mitochondria to maintain mtDNA integrity. ALS-mutant FUS impairs this interaction, hindering mtLig3's repair role and causing increased mtDNA damage and mutations. Targeted introduction of human DNA Ligase 1 restores repair mechanisms and mitochondrial activity in FUS mutant cells.","method":"Co-immunoprecipitation (FUS-mtLig3), mtDNA damage assays, ALS patient iPSC-derived cells, transgenic mouse model, autopsy samples, DNA Ligase 1 rescue expression","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — direct protein interaction, functional DNA repair assay, multiple model systems (iPSC, transgenic mouse, patient autopsy), and rescue experiment","pmids":["38461154"],"is_preprint":false},{"year":2024,"finding":"Reduction of m6A RNA modification (via METTL3 inhibitor STM-2457) decreases the number and accelerates dissolution of FUS-containing stress granules/cytoplasmic inclusions in neuronal cells, iPSC-derived motor neurons, and patient-derived fibroblasts expressing mutant FUS. Cells expressing mutant FUS show higher m6A levels, suggesting m6A homeostasis influences pathological FUS aggregate formation.","method":"METTL3 inhibitor treatment (STM-2457), stress granule imaging, m6A quantification, iPSC-derived motor neurons, patient fibroblasts, transcriptome analysis","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — pharmacological intervention with cellular readout across multiple model systems, single lab","pmids":["38866783"],"is_preprint":false}],"current_model":"FUS is a multifunctional nuclear RNA/DNA-binding protein that shuttles between nucleus and cytoplasm via Karyopherin-β2/Transportin-1-mediated import (through its C-terminal PY-NLS and, for truncation mutants, RGG regions); in the nucleus it binds RNA broadly via its zinc finger domain (rather than RRM), binds active chromatin through N-terminal self-assembly to activate transcription, represses both RNA Pol II-associated splicing (by recruiting SR proteins) and RNA Pol III transcription (via TBP interaction), autoregulates its own expression through intron retention and NMD, is phosphorylated at Ser42 by ATM and at its N-terminus by DNA-PK in response to DNA double-strand breaks, interacts with HDAC1 to support DSB repair signaling, and interacts with mtDNA Ligase IIIα to maintain mitochondrial DNA integrity; in the cytoplasm, FUS associates with the SMN-snRNP complex, regulates microRNA silencing through AGO2 interaction, mediates mTOR-dependent translational repression at polyribosomes, and undergoes phase separation/condensation that is potently triggered by transient PAR interactions and modulated by post-translational modifications including acetylation (K510 disrupts Transportin-1 binding; K315/K316 reduces RNA binding) and arginine methylation (in RGG domains), with ALS-linked mutations predominantly disrupting nuclear localization and causing cytoplasmic misaccumulation that impairs splicing, autoregulation, DDR, translation, and mitochondrial function."},"narrative":{"mechanistic_narrative":"FUS is a multifunctional nucleocytoplasmic-shuttling RNA/DNA-binding protein that couples transcription, splicing, the DNA damage response, and translational control through regulated self-assembly and condensation [PMID:9264461, PMID:25453086]. It binds nucleic acids with limited sequence specificity—engaging diverse RNAs and single-stranded DNA primarily through its zinc finger rather than its RRM domain [PMID:15299008, PMID:26150427]—and its N-terminal QGSY-rich region drives self-assembly onto active chromatin to activate transcription [PMID:25453086]. In the nucleus FUS binds RNA polymerase II via its N-terminus while recruiting SR splicing factors through its C-terminus to regulate pre-mRNA splicing [PMID:10779324, PMID:24268778], represses RNA polymerase III transcription through TBP [PMID:19841068], and autoregulates its own levels by repressing exon 7 splicing to trigger nonsense-mediated decay [PMID:24204307, PMID:32479602]. FUS participates in the DNA double-strand break response, being phosphorylated at Ser42 by ATM and at its N-terminus by DNA-PK, recruited to break sites through HDAC1, and additionally localizing to mitochondria where it recruits DNA Ligase IIIα to maintain mtDNA integrity [PMID:18620545, PMID:24899704, PMID:24036913, PMID:38461154]. In the cytoplasm it associates with the SMN complex to support Gem formation, promotes microRNA silencing through AGO2, and mediates mTOR-dependent translational repression at stalled polyribosomes [PMID:23022481, PMID:29499134, PMID:33082139]. FUS undergoes liquid-liquid phase separation that is potently triggered by transient poly(ADP-ribose) interactions and tuned by post-translational modifications, including K510 acetylation that disrupts Transportin-1 binding and arginine methylation of RGG regions [PMID:35182479, PMID:32691043, PMID:33580145]. ALS-causing FUS mutations disrupt PY-NLS-dependent nuclear import and cause cytoplasmic mislocalization that impairs splicing, autoregulation, the DNA damage response, and translation, and seeds aberrant condensation that sequesters partners such as FMRP and kinesin-1 [PMID:19251627, PMID:33580145, PMID:34290090, PMID:28298410]. Distinct from neurodegeneration, FUS fusion oncoproteins (FUS-CHOP) drive liposarcoma, with the FUS domain required for transformation and the FUS::DDIT3 fusion antagonizing BAF/CEBPB-mediated adipogenic chromatin remodeling [PMID:10828883, PMID:11146553, PMID:35390276].","teleology":[{"year":1994,"claim":"Established the bipartite molecular nature of FUS by showing it both binds RNA and harbors a transcriptional activation domain, framing it as a coupler of nucleic acid binding and gene expression.","evidence":"In vitro RNA binding and transactivation reporter assays on FUS and the TLS-ERG fusion","pmids":["7970732"],"confidence":"Medium","gaps":["Sequence specificity of RNA binding not resolved","Endogenous transcriptional targets unidentified"]},{"year":1997,"claim":"Resolved where and how FUS engages RNA in cells, defining it as a shuttling, largely non-sequence-specific hnRNP-like RNA chaperone.","evidence":"In vivo UV crosslinking, heterokaryon shuttling assays, and cellular fractionation","pmids":["9264461"],"confidence":"High","gaps":["Which domain dominates binding not yet defined","Shuttling machinery not identified"]},{"year":2000,"claim":"Connected FUS to the transcription-splicing interface and explained oncogenic dysregulation by showing FUS bridges RNA Pol II and SR factors, while FUS-CHOP overexpression drives liposarcoma requiring the FUS domain.","evidence":"Co-IP and CD44 splicing assays plus transgenic mouse liposarcoma models with domain-swap controls","pmids":["10779324","10828883","11146553"],"confidence":"High","gaps":["Mechanism of FUS-CHOP transformation at chromatin not defined","In vivo splicing target set unknown"]},{"year":2004,"claim":"Defined the structural architecture of FUS, identifying the zinc finger (not the RRM) as the principal structured RNA-recognition module amid disordered RGG regions.","evidence":"Limited proteolysis, CD, and NMR chemical shift mapping with GGUG RNA","pmids":["15299008"],"confidence":"High","gaps":["Functional consequence of zinc-finger binding in cells untested","Role of disordered regions in binding unresolved"]},{"year":2008,"claim":"Placed FUS within DNA damage signaling by identifying ATM-dependent Ser42 phosphorylation specifically after double-strand breaks.","evidence":"In vitro kinase assays, ATM inhibitors, and phospho-specific antibody detection","pmids":["18620545"],"confidence":"High","gaps":["Downstream consequence of Ser42 phosphorylation unclear","Recruitment to break sites not yet shown"]},{"year":2009,"claim":"Established FUS as an ALS gene whose disease mutations share a common cellular signature of cytoplasmic mislocalization.","evidence":"Familial ALS genetic sequencing with neuronal immunolocalization of mutant FUS","pmids":["19251627"],"confidence":"High","gaps":["Mechanism linking mislocalization to neurodegeneration unknown","Import pathway disrupted by mutations not defined"]},{"year":2010,"claim":"Extended FUS transcriptional control to RNA Pol III, showing it represses all three Pol III promoter classes, likely via TBP.","evidence":"In vitro transcription, ChIP, and siRNA/overexpression of FUS","pmids":["19841068"],"confidence":"High","gaps":["Direct FUS-TBP contact not structurally confirmed","Physiological role of Pol III repression unclear"]},{"year":2012,"claim":"Defined cytoplasmic and nuclear-body functions by linking FUS to the SMN complex and Gem formation, and mapped its transcriptome-wide binding around alternatively spliced exons.","evidence":"Co-IP, Gem counting in patient fibroblasts, and HITS-CLIP in mouse cerebrum","pmids":["23022481","22829983"],"confidence":"High","gaps":["Functional outcome of Gem loss for motor neurons unclear","Causality of CLIP-defined binding on splicing not all tested"]},{"year":2013,"claim":"Built an integrated picture of nuclear FUS as a self-assembling, RNA-nucleated factor that controls Pol II CTD phosphorylation, autoregulates its own mRNA, and behaves abnormally in stress granules when mutated, while also identifying HDAC1 as the partner required for DSB recruitment.","evidence":"Assembly/EM assays, CLIP-seq autoregulation analysis, live-cell stress-granule imaging, and FUS-HDAC1 co-IP with DSB recruitment assays","pmids":["24268778","24204307","24090136","24036913"],"confidence":"High","gaps":["How condensation properties relate to physiological function vs pathology unresolved","Mechanism of HDAC1-dependent recruitment not detailed"]},{"year":2014,"claim":"Resolved how FUS activates transcription and how DNA damage redistributes it, showing N-terminal self-assembly drives chromatin binding for transcription, while DNA-PK phosphorylation drives cytoplasmic translocation distinct from ATM signaling.","evidence":"Chromatin fractionation/ChIP with domain mutants and DNA-PK inhibitor experiments in primary neurons; plus FUS as an AR co-activator and activity-dependent regulation in neurons","pmids":["25453086","24899704","21909421","25324524"],"confidence":"High","gaps":["Separation of chromatin-activation from splicing roles incompletely mapped","Physiological trigger for DNA-PK-driven export in neurons unclear"]},{"year":2015,"claim":"Quantitatively settled that FUS lacks strong sequence specificity and binds RNA preferentially over ssDNA and duplex nucleic acids.","evidence":"Filter binding and fluorescence polarization across candidate motifs and nucleic acid types","pmids":["26150427"],"confidence":"High","gaps":["How specificity is achieved in vivo unresolved","Contribution of RNA structure to binding partly addressed"]},{"year":2017,"claim":"Showed that cytoplasmic FUS inclusions disrupt RNA transport by sequestering kinesin-1 mRNA and protein, mechanistically linking condensation to cytoskeletal and trafficking defects.","evidence":"RNA localization microscopy, Hsp104 disaggregase and kinesin-1 rescue, and tubulin modification analysis","pmids":["28298410"],"confidence":"High","gaps":["Generalizability across neuronal RNA cargoes unclear","Relationship to in vivo neurodegeneration not established"]},{"year":2018,"claim":"Defined a cytoplasmic gene-silencing role by showing FUS partners with AGO2 to promote miRNA-mediated silencing, a function impaired by ALS truncation and conserved in C. elegans.","evidence":"FUS-AGO2 co-IP, reporter silencing assays, ALS mutant comparison, and fust-1 genetics","pmids":["29499134"],"confidence":"High","gaps":["Breadth of FUS-dependent miRNA targets unknown","Mechanism of AGO2 cooperation not structurally defined"]},{"year":2019,"claim":"Provided mutation-independent routes to FUS mislocalization and altered binding in ALS by showing FUS binds retained introns in SFPQ that export it, and shifts toward 3'UTR binding with ELAVL4 interaction in mutant motor neurons.","evidence":"RNA-IP/iCLIP in iPSC motor neurons, mouse models, and post-mortem ALS spinal cord","pmids":["31368485","31242416"],"confidence":"Medium","gaps":["Causal contribution to disease onset unproven","Single-lab binding maps await independent replication"]},{"year":2020,"claim":"Established post-translational and translational control of FUS, identifying acetylation as a regulator of import and RNA binding, mTOR-dependent translational stalling, ALS-driven splicing loss-of-function, and EGFR-driven nuclear translocation activating collagen IV.","evidence":"Acetylation site mapping with Transportin-1 co-IP, polyribosome fractionation with Torin1, isogenic knockin/knockout RNA-seq, and tyrosine-phosphorylation/ChIP analyses","pmids":["32691043","33082139","32479602","32678881"],"confidence":"High","gaps":["Crosstalk between acetylation, methylation, and phosphorylation unresolved","In vivo relevance of EGFR-FUS-collagen axis untested in neurons"]},{"year":2021,"claim":"Linked FUS condensation to translational repression and uncovered a hidden coding layer, showing mutant FUS sequesters FMRP to repress translation while a nested altFUS protein drives autophagy and mitochondrial defects.","evidence":"Knockin mouse/human motor neurons with in vitro phase separation and ribosome profiling/altORF constructs in Drosophila","pmids":["34290090","33226175"],"confidence":"High","gaps":["Relative contribution of altFUS vs FUS to pathology unresolved","FMRP co-repression target scope incompletely mapped"]},{"year":2021,"claim":"Provided structural understanding of nuclear import disruption, showing how ALS mutations weaken or rewire Karyopherin-β2 binding and that this binding also suppresses FUS phase separation.","evidence":"Crystal structure of Kapβ2·FUS(P525L) PY-NLS with biochemical and cell-based localization assays","pmids":["33580145"],"confidence":"High","gaps":["Role of methylation in modulating import in vivo partly resolved","Quantitative link between import defect and aggregation unmeasured"]},{"year":2022,"claim":"Identified poly(ADP-ribose) as a potent, transient trigger of FUS condensation distinct from RNA, and recast the FUS-CHOP oncoprotein as a chromatin-remodeling antagonist that sequesters CEBPB from BAF complexes.","evidence":"Single-molecule condensation assays with PARP5a inhibition; ChIP-seq/ATAC-seq with CEBPB co-IP in myxoid liposarcoma","pmids":["35182479","35390276"],"confidence":"High","gaps":["Physiological role of PAR-triggered condensation in DNA repair unresolved","Therapeutic targetability of CEBPB sequestration untested"]},{"year":2024,"claim":"Extended FUS function to mitochondrial genome maintenance and identified m6A as a modulator of pathological aggregation, showing FUS recruits DNA Ligase IIIα to mtDNA damage and that lowering m6A dissolves mutant FUS inclusions.","evidence":"FUS-mtLig3 co-IP with mtDNA repair and Ligase 1 rescue across iPSC/mouse/autopsy models; METTL3 inhibition with stress-granule imaging","pmids":["38461154","38866783"],"confidence":"High","gaps":["Mechanism linking m6A levels to FUS condensation undefined","Contribution of mtDNA damage to motor neuron death untested"]},{"year":null,"claim":"How FUS's many activities are coordinately switched in space and time, and which are the proximal drivers of neurodegeneration versus secondary consequences of mislocalization, remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model ranking splicing, DDR, translation, and mitochondrial defects by causal priority in ALS","Physiological versus pathological roles of condensation not cleanly separated","Interplay among acetylation, methylation, phosphorylation, and PAR in vivo undefined"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[0,1,5,20]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[20,35]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[1,8,17,18,29]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[2,9,23]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[0,7,17]},{"term_id":"GO:0005829","term_label":"cytosol","supporting_discovery_ids":[0,7,16,27]},{"term_id":"GO:0000228","term_label":"nuclear chromosome","supporting_discovery_ids":[17,6]},{"term_id":"GO:0005739","term_label":"mitochondrion","supporting_discovery_ids":[35]},{"term_id":"GO:0005840","term_label":"ribosome","supporting_discovery_ids":[27]}],"pathway":[{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[2,14,23,28]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[8,17,18,29]},{"term_id":"R-HSA-73894","term_label":"DNA Repair","supporting_discovery_ids":[6,11,16,35]},{"term_id":"R-HSA-1643685","term_label":"Disease","supporting_discovery_ids":[7,30,34]},{"term_id":"R-HSA-392499","term_label":"Metabolism of proteins","supporting_discovery_ids":[27,30]}],"complexes":["SMN-snRNP complex","miRISC (AGO2)"],"partners":["AGO2","HDAC1","TRANSPORTIN-1/KAPΒ2","SMN","FMRP","TBP","ELAVL4","DNA LIGASE IIIΑ"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"P35637","full_name":"RNA-binding protein FUS","aliases":["75 kDa DNA-pairing protein","Oncogene FUS","Oncogene TLS","POMp75","Translocated in liposarcoma protein"],"length_aa":526,"mass_kda":53.4,"function":"DNA/RNA-binding protein that plays a role in various cellular processes such as transcription regulation, RNA splicing, RNA transport, DNA repair and damage response (PubMed:27731383). Binds to ssRNA containing the consensus sequence 5'-AGGUAA-3' (PubMed:21256132). Binds to nascent pre-mRNAs and acts as a molecular mediator between RNA polymerase II and U1 small nuclear ribonucleoprotein thereby coupling transcription and splicing (PubMed:26124092). Also binds its own pre-mRNA and autoregulates its expression; this autoregulation mechanism is mediated by non-sense-mediated decay (PubMed:24204307). Plays a role in DNA repair mechanisms by promoting D-loop formation and homologous recombination during DNA double-strand break repair (PubMed:10567410). In neuronal cells, plays crucial roles in dendritic spine formation and stability, RNA transport, mRNA stability and synaptic homeostasis (By similarity)","subcellular_location":"Nucleus","url":"https://www.uniprot.org/uniprotkb/P35637/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":false,"resolved_as":"","url":"https://depmap.org/portal/gene/FUS","classification":"Not Classified","n_dependent_lines":44,"n_total_lines":1208,"dependency_fraction":0.03642384105960265},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"SNRPF","stoichiometry":10.0},{"gene":"SNRPC","stoichiometry":10.0},{"gene":"SNRPA","stoichiometry":10.0},{"gene":"SNRPD2","stoichiometry":4.0},{"gene":"RBMX","stoichiometry":4.0},{"gene":"TNPO1","stoichiometry":4.0},{"gene":"ERG28","stoichiometry":0.2},{"gene":"PRPF8","stoichiometry":0.2},{"gene":"CCAR1","stoichiometry":0.2},{"gene":"EIF3M","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/FUS","total_profiled":1310},"omim":[{"mim_id":"619132","title":"FRONTOTEMPORAL DEMENTIA AND/OR AMYOTROPHIC LATERAL SCLEROSIS 8; FTDALS8","url":"https://www.omim.org/entry/619132"},{"mim_id":"616439","title":"FRONTOTEMPORAL DEMENTIA AND/OR AMYOTROPHIC LATERAL SCLEROSIS 4; FTDALS4","url":"https://www.omim.org/entry/616439"},{"mim_id":"616437","title":"FRONTOTEMPORAL DEMENTIA AND/OR AMYOTROPHIC LATERAL SCLEROSIS 3; FTDALS3","url":"https://www.omim.org/entry/616437"},{"mim_id":"614782","title":"TREMOR, HEREDITARY ESSENTIAL, 4; ETM4","url":"https://www.omim.org/entry/614782"},{"mim_id":"614392","title":"TUDOR DOMAIN-CONTAINING PROTEIN 3; TDRD3","url":"https://www.omim.org/entry/614392"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Supported","locations":[{"location":"Nucleoplasm","reliability":"Supported"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/FUS"},"hgnc":{"alias_symbol":["TLS","FUS1","hnRNP-P2","HNRNPP2"],"prev_symbol":["ALS6"]},"alphafold":{"accession":"P35637","domains":[{"cath_id":"3.30.70.330","chopping":"285-367","consensus_level":"high","plddt":88.1983,"start":285,"end":367},{"cath_id":"4.10.1060.10","chopping":"423-453","consensus_level":"medium","plddt":87.2532,"start":423,"end":453}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/P35637","model_url":"https://alphafold.ebi.ac.uk/files/AF-P35637-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-P35637-F1-predicted_aligned_error_v6.png","plddt_mean":53.59},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=FUS","jax_strain_url":"https://www.jax.org/strain/search?query=FUS"},"sequence":{"accession":"P35637","fasta_url":"https://rest.uniprot.org/uniprotkb/P35637.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/P35637/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/P35637"}},"corpus_meta":[{"pmid":"19251627","id":"PMC_19251627","title":"Mutations in the FUS/TLS gene on chromosome 16 cause familial amyotrophic lateral sclerosis.","date":"2009","source":"Science (New York, N.Y.)","url":"https://pubmed.ncbi.nlm.nih.gov/19251627","citation_count":2128,"is_preprint":false},{"pmid":"20400460","id":"PMC_20400460","title":"TDP-43 and FUS/TLS: emerging roles in RNA processing and neurodegeneration.","date":"2010","source":"Human molecular genetics","url":"https://pubmed.ncbi.nlm.nih.gov/20400460","citation_count":806,"is_preprint":false},{"pmid":"20864052","id":"PMC_20864052","title":"TDP-43 and FUS in amyotrophic lateral sclerosis and frontotemporal dementia.","date":"2010","source":"The Lancet. 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The RRM domain was found dispensable for in vivo RNA binding, suggesting predominantly non-sequence-specific interactions. Cellular fractionation showed TLS binds RNA in both nucleus and cytoplasm, consistent with an hnRNP-like chaperone function.\",\n      \"method\": \"In vivo UV crosslinking, interspecific heterokaryon assay, cytoplasmic antibody injection, cellular fractionation\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal methods (UV crosslinking, heterokaryon, antibody trapping, fractionation) in a single focused mechanistic study\",\n      \"pmids\": [\"9264461\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 1994,\n      \"finding\": \"The TLS/FUS protein binds RNA in vitro with preferential binding to poly-G, requiring both amino- and carboxy-terminal RNA-binding motifs. The TLS/FUS N-terminal fusion domain (TFD) in the TLS-ERG chimeric protein functions as a transcriptional activation domain, replacing the ERG N-terminal activation domain, as shown by mutational analysis.\",\n      \"method\": \"In vitro RNA binding assay, mutational analysis of fusion protein, transactivation reporter assays\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro binding and mutagenesis in a single lab study\",\n      \"pmids\": [\"7970732\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"TLS/FUS binds RNA polymerase II through its N-terminal domain and recruits serine-arginine (SR) splicing factors through its C-terminal domain. The TLS-ERG leukemia fusion protein retains RNA Pol II binding but loses SR protein recruitment due to replacement of the C-terminus, leading to inhibition of SR-mediated pre-mRNA splicing and altered CD44 splicing in stable K562 cell lines.\",\n      \"method\": \"Co-immunoprecipitation, transient transfection splicing assays, stable cell line expression, CD44 splicing analysis\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal interactions shown, functional splicing consequence demonstrated with multiple approaches in same study\",\n      \"pmids\": [\"10779324\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"Expression of the FUS/TLS-CHOP fusion transgene in mice specifically induces liposarcomas with characteristic lipoblast morphology, intracellular lipid accumulation, induction of adipocyte-specific genes, and high PPARgamma expression, establishing FUS-CHOP overexpression as a key determinant of liposarcoma.\",\n      \"method\": \"Transgenic mouse model with EF1alpha-driven FUS-CHOP expression, histological and gene expression analysis\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo genetic model with defined phenotypic readout and molecular characterization\",\n      \"pmids\": [\"10828883\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2000,\n      \"finding\": \"The FUS/TLS domain of FUS-CHOP is required for liposarcoma initiation: transgenic mice expressing CHOP alone (without FUS domain) do not develop tumors, while mice expressing inverted CHOP-FUS (FUS domain fused to C-terminus of CHOP) do develop liposarcomas, establishing a specific and critical role for the FUS domain in transformation.\",\n      \"method\": \"Transgenic mouse models comparing FUS-CHOP, CHOP alone, and inverted CHOP-FUS constructs\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genetic domain-swap experiment with clear positive and negative controls in vivo\",\n      \"pmids\": [\"11146553\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Structural analysis of human TLS/FUS by limited proteolysis, CD, and NMR revealed that the RRM and zinc finger-like domains form protease-resistant core structures while the RGG repeat regions are unstructured. NMR chemical shift perturbation showed that the zinc finger domain (not the RRM) binds GGUG-containing RNA with Kd ~10^-5 M, suggesting the zinc finger plays a predominant role in RNA recognition.\",\n      \"method\": \"Limited proteolysis, MALDI-TOF MS, circular dichroism, NMR spectroscopy (113Cd NMR, amide chemical shift perturbation)\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct structural and binding measurements with multiple biophysical methods in a focused study\",\n      \"pmids\": [\"15299008\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"FUS/TLS is phosphorylated at Ser42 in vivo primarily in response to DNA double-strand breaks, with this phosphorylation requiring ATM (not DNA-PK) as established by kinase-specific inhibition and in vitro PIKK phosphorylation assays. Phospho-specific antibodies confirmed in vivo DSB-induced phosphorylation.\",\n      \"method\": \"DNA-affinity chromatography, in vitro kinase assay, phospho-specific antibody generation and western blotting, ATM inhibitor experiments\",\n      \"journal\": \"The Biochemical journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro kinase assay combined with in vivo pharmacological dissection and phospho-specific antibody validation\",\n      \"pmids\": [\"18620545\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2009,\n      \"finding\": \"Mutations in FUS/TLS cause its abnormal accumulation in the cytoplasm of neurons (instead of the normal predominantly nuclear localization), identified in familial ALS patients with 13 distinct FUS/TLS mutations.\",\n      \"method\": \"Genetic sequencing of familial ALS patients, immunohistochemistry and cellular localization analysis of mutant vs. wild-type FUS in neurons\",\n      \"journal\": \"Science (New York, N.Y.)\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple independent mutations shown to alter subcellular localization, replicated across multiple families\",\n      \"pmids\": [\"19251627\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"TLS/FUS represses RNA polymerase III transcription from all three classes of RNAP III promoters in vitro and associates with RNAP III genes in vivo, possibly via direct interaction with TBP. siRNA depletion of TLS increased RNAP III transcript levels and RNAP III/TBP occupancy at target genes; overexpression decreased RNAP III transcripts.\",\n      \"method\": \"In vitro transcription assay, ChIP, siRNA knockdown with RT-qPCR, overexpression studies\",\n      \"journal\": \"Molecular and cellular biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro reconstitution plus in vivo ChIP and loss/gain of function, multiple orthogonal methods\",\n      \"pmids\": [\"19841068\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"FUS associates with the SMN complex, mediated by U1 snRNP and by direct protein-protein interactions between FUS and SMN. FUS is required for Gems (Cajal body-related nuclear structures) formation in HeLa cells; ALS-causing FUS mutation R495X also results in Gem loss. Reduction in Gems was observed in ALS patient fibroblasts expressing mutant FUS or TDP-43.\",\n      \"method\": \"Co-immunoprecipitation, direct interaction assays, immunofluorescence/Gem counting, patient fibroblast analysis\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal co-IP, direct interaction, functional cellular readout, and patient tissue validation\",\n      \"pmids\": [\"23022481\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"HITS-CLIP analysis in mouse cerebrum revealed that FUS binding sites tend to form stable secondary structures, that FUS binds scattered sites around alternatively spliced exons (including MAPT, CAMK2A, FMR1), and that FUS binding to promoter antisense strands downregulates coding-strand transcription in a position-dependent manner.\",\n      \"method\": \"HITS-CLIP, exon arrays in mouse cortical neurons, bioinformatic analysis\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — transcriptome-wide binding map with functional correlation, single lab\",\n      \"pmids\": [\"22829983\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"FUS interacts directly with HDAC1, and this interaction is required for FUS recruitment to DNA double-strand break sites and proper DDR signaling. ALS-mutant FUS proteins show diminished interaction with HDAC1 and are defective in DDR and DNA repair.\",\n      \"method\": \"Co-immunoprecipitation (FUS-HDAC1), live-cell imaging of FUS recruitment to DSB sites, DNA damage repair assays, patient tissue analysis\",\n      \"journal\": \"Nature neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct protein interaction, functional DSB recruitment assay, ALS mutant characterization, and patient validation — multiple orthogonal methods\",\n      \"pmids\": [\"24036913\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"RNA binding nucleates the formation of higher-order FUS ribonucleoprotein assemblies that bind the CTD of RNA polymerase II in an RNA-dependent manner, affecting Ser2 phosphorylation and transcription. Both the low-complexity domain and the RGG-rich domain contribute to assembly. The assemblies appear fibrous by electron microscopy with characteristics of β-zipper structures.\",\n      \"method\": \"Biochemical assembly assays, electron microscopy, RNA Pol II CTD binding assays, phosphorylation analysis\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — reconstitution-style assembly assay, structural (EM) characterization, functional Pol II CTD interaction\",\n      \"pmids\": [\"24268778\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"ALS-linked mutant FUS alters stress granule dynamics: it delays stress granule assembly but once formed, stress granules containing mutant FUS are larger, more dynamic, and more abundant. The RGG domains of FUS are required for its incorporation into stress granules. Arginine methylation within RGG domains does not modulate FUS incorporation into stress granules.\",\n      \"method\": \"Live-cell fluorescence imaging, stress granule assembly/disassembly kinetics, domain deletion analysis, methyltransferase inhibitor treatment\",\n      \"journal\": \"Molecular neurodegeneration\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — quantitative live imaging with domain mutants, single lab study\",\n      \"pmids\": [\"24090136\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"FUS autoregulates its own protein levels by binding to exon 7 and flanking introns of its own pre-mRNA, repressing exon 7 splicing and promoting nonsense-mediated decay of the exon 7-skipped isoform. ALS mutations causing cytoplasmic FUS mislocalization (R521G, R522G, ΔExon15) show progressively impaired exon 7 repression and autoregulation, correlating with degree of cytoplasmic mislocalization.\",\n      \"method\": \"FUS CLIP-seq, splicing reporter assays, siRNA knockdown/rescue, overexpression, antisense oligonucleotides\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — CLIP-seq binding map with functional splicing assays, knockdown/rescue, ALS mutant series, multiple orthogonal methods\",\n      \"pmids\": [\"24204307\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"FUS is a prosurvival factor during hyperosmolar stress. Endogenous FUS redistributes from nucleus to cytoplasm and incorporates into stress granules specifically in response to sorbitol (not other stressors like arsenite, H2O2, thapsigargin, or heat shock). This cytoplasmic redistribution is modulated by methyltransferase activity but methyltransferase inhibition does not affect SG incorporation. FUS-depleted cells show reduced viability under hyperosmolar stress.\",\n      \"method\": \"Immunofluorescence localization, methyltransferase inhibitors, siRNA knockdown, cell viability assays\",\n      \"journal\": \"Journal of cellular physiology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct localization imaging with functional viability readout, single lab\",\n      \"pmids\": [\"23625794\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"DNA damage (double-strand breaks induced by calicheamicin γ1) causes cytoplasmic translocation of FUS mediated by phosphorylation of its N-terminus by DNA-dependent protein kinase (DNA-PK). This mechanism is distinct from ATM-mediated phosphorylation at Ser42. Cytoplasmic translocation of FUS after DNA damage also involves TAF15, EWS, and Transportin-1.\",\n      \"method\": \"Drug treatment (calicheamicin γ1), immunofluorescence, phosphorylation mapping, DNA-PK inhibitor experiments, primary human neurons and astrocytes\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — pharmacological dissection of kinase identity, multiple cell types including primary neurons, mechanistic phosphorylation mapping\",\n      \"pmids\": [\"24899704\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Nuclear FUS binds active chromatin, and this binding is required for FUS transcription activation (but not alternative splicing regulation). The N-terminal QGSY-rich region (aa 1-164) mediates FUS self-assembly in the mammalian nucleus, which is essential for chromatin binding and transcription activation. RNA binding is also required for FUS self-assembly and chromatin binding. ALS mutations dramatically decrease chromatin binding ability.\",\n      \"method\": \"Chromatin fractionation, ChIP, domain deletion mutants, transcription reporter assays, self-assembly assays, RNA-binding mutants\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple functional assays with domain mutants, single lab study\",\n      \"pmids\": [\"25453086\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"FUS is a co-activator of androgen receptor (AR) in prostate cancer cells. Endogenous FUS co-immunoprecipitates with AR in LNCaP cells, FUS is recruited to the ARE III of the PSA gene enhancer by ChIP, and FUS overexpression enhances while FUS knockdown reduces AR transcriptional activity and androgen-dependent cell proliferation.\",\n      \"method\": \"Co-immunoprecipitation of endogenous proteins, ChIP, GAL4 transactivation assay, overexpression and siRNA knockdown\",\n      \"journal\": \"PloS one\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal co-IP with endogenous proteins, ChIP, and functional gain/loss of function — single lab\",\n      \"pmids\": [\"21909421\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Activity-dependent regulation of FUS: activation of metabotropic glutamate receptors 1/5 in neocortical slices and synaptoneurosomes increases endogenous mouse FUS and FUS-WT protein levels but decreases FUS-R521G mutant protein, providing a biochemical basis for differential dendritic spine effects between WT and mutant FUS.\",\n      \"method\": \"Synaptoneurosomes preparation, mGluR1/5 pharmacological stimulation, western blotting\",\n      \"journal\": \"Proceedings of the National Academy of Sciences of the United States of America\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — biochemical fractionation with pharmacological stimulation, single lab, limited mechanistic follow-up\",\n      \"pmids\": [\"25324524\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"FUS binds diverse RNA sequences without strong sequence specificity: all five previously proposed binding motifs bind with Kd values spanning only 10-fold, and some RNAs lacking these motifs bind with similar affinity. FUS binds RNA in a length-dependent manner consistent with a substantial non-specific component. FUS binds single-stranded DNA with ~3-fold lower affinity than ssRNA, and double-stranded nucleic acids bind more weakly.\",\n      \"method\": \"Quantitative in vitro RNA/DNA binding assays (filter binding, fluorescence polarization), systematic comparison of binding motifs\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — direct quantitative in vitro binding measurements across multiple substrates, single focused mechanistic study\",\n      \"pmids\": [\"26150427\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"PINK1 and Parkin are genetic modifiers of FUS-induced neurodegeneration in Drosophila. Downregulating PINK1 or Parkin expression ameliorated FUS-induced neurodegeneration phenotypes. FUS overexpression elevated PINK1 and Parkin protein levels and increased ubiquitinylation of Miro1 (a Parkin E3 ligase substrate). FUS expression reduced mitochondrial axonal transport motility and processivity in motor neurons.\",\n      \"method\": \"Drosophila genetic modifier screen, western blotting, mitochondrial transport imaging, ubiquitination assays\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis in Drosophila with multiple mechanistic readouts, single lab\",\n      \"pmids\": [\"27794540\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"FUS inclusions lead to mislocalization of specific RNAs from fibroblast cell protrusions and neuronal axons by sequestering kinesin-1 mRNA and protein within inclusions, causing loss of detyrosinated glutamate (Glu)-microtubules and failure of RNA localization. Dissolution of FUS inclusions with engineered Hsp104 disaggregases or kinesin-1 overexpression reverses these effects. Kinesin-1 affects MT detyrosination by targeting tubulin carboxypeptidase enzyme to specific MTs.\",\n      \"method\": \"Fluorescence microscopy of RNA localization, kinesin-1 co-recruitment analysis, Hsp104 disaggregase treatment, tubulin modification analysis, rescue experiments\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — mechanism established with multiple approaches including pharmacological rescue, domain mutants, and functional readouts across cell types\",\n      \"pmids\": [\"28298410\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"FUS interacts with the core miRISC component AGO2 and is required for optimal microRNA-mediated gene silencing. FUS promotes silencing by binding to microRNA and mRNA targets (demonstrated for miR-200c and its target ZEB1). The ALS truncation mutant R495X impairs microRNA-mediated gene silencing. The C. elegans homolog fust-1 shares this conserved function.\",\n      \"method\": \"Co-immunoprecipitation (FUS-AGO2), RNA binding assays, reporter gene silencing assays, ALS mutant comparison, C. elegans genetic experiments\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — reciprocal co-IP, functional silencing assay, evolutionary conservation across species — multiple orthogonal methods\",\n      \"pmids\": [\"29499134\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Wild-type FUS protein binds to aberrantly retained introns within SFPQ transcripts that are exported from the nucleus into the cytoplasm, providing a mechanism for FUS nuclear-to-cytoplasmic mislocalization in ALS independent of FUS mutations.\",\n      \"method\": \"RNA immunoprecipitation, iPSC-derived motor neurons, transgenic mouse models, post-mortem ALS spinal cord analysis\",\n      \"journal\": \"Brain : a journal of neurology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct binding evidence in human and mouse models, single lab but multiple model systems\",\n      \"pmids\": [\"31368485\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2019,\n      \"finding\": \"Wild-type FUS preferentially binds introns in human motor neuron pre-mRNAs, while ALS mutation (studied in RNA interactome) causes a shift toward 3' UTR binding. ELAVL4 protein levels are increased in ALS-mutant FUS motor neurons; ELAVL4 and mutant FUS interact and co-localize in cytoplasmic speckles with altered biomechanical properties and in stress granules under oxidative stress.\",\n      \"method\": \"RNA interactome analysis (iCLIP), immunoprecipitation (FUS-ELAVL4), immunofluorescence, iPSC-derived motor neurons, post-mortem ALS spinal cord\",\n      \"journal\": \"Cell reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — iCLIP binding map plus protein interaction and co-localization, patient tissue validation — single lab\",\n      \"pmids\": [\"31242416\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FUS acetylation at K510 (in the nuclear localization sequence) disrupts its interaction with Transportin-1, causing cytoplasmic mislocalization and stress granule-like inclusion formation. Acetylation at K315/K316 (in the RNA recognition motif) reduces RNA binding and decreases cytoplasmic inclusion formation. CREB-binding protein/p300 acetylates FUS, while both sirtuins and HDACs contribute to FUS deacetylation. ALS patient fibroblasts show higher FUS K510 acetylation than controls.\",\n      \"method\": \"Acetylation site mapping, co-immunoprecipitation (FUS-Transportin-1), site-directed mutagenesis, immunofluorescence, HDAC inhibitor treatment, patient fibroblast analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — modification site mapping, writer/eraser identification, functional mutagenesis, and patient validation — multiple orthogonal methods\",\n      \"pmids\": [\"32691043\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FUS associates with stalled polyribosomes in an mTOR-dependent manner: this association is increased by Torin1 (mTOR kinase inhibitor) or nutrient deprivation but not rapamycin. FUS is required for efficient translational stalling — FUS-deficient cells are refractory to mTOR inhibition-induced translation repression. ALS-linked mutants R521G and P525L associate abundantly with polyribosomes and decrease global protein synthesis; this effect requires RNA-binding by FUS.\",\n      \"method\": \"Polyribosome fractionation, Torin1/rapamycin treatment, FUS knockdown/knockout cells, metabolic labeling for translation, RNA-binding mutants\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — biochemical fractionation with pharmacological and genetic dissection, RNA-binding mutant validation — single lab\",\n      \"pmids\": [\"33082139\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"FUS ALS-causative mutations induce widespread loss-of-function on splicing, specifically altering intron retention levels in RNA-binding proteins. An intron retention event in FUS itself is associated with its autoregulation and is altered by FUS mutations. This autoregulatory intron retention is also observed in other ALS-linked mutations (TDP-43, VCP, SOD1), suggesting a shared regulatory RNA network.\",\n      \"method\": \"High-depth RNA-seq on FUS knockin and knockout models, splicing analysis, comparison across ALS genetic models\",\n      \"journal\": \"Nucleic acids research\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — isogenic knockin vs. knockout comparison with high-depth sequencing, multiple ALS genetic models validated\",\n      \"pmids\": [\"32479602\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"EGF receptor (EGFR) phosphorylates FUS at specific tyrosine sites, promoting FUS nuclear translocation. Nuclear FUS binds to the collagen IV promoter, activating transcription. Integrin α1β1 prevents this pathway by inhibiting EGFR. A cell-penetrating peptide that inhibits FUS nuclear translocation reduces collagen IV transcription.\",\n      \"method\": \"Tyrosine phosphorylation analysis, EGFR inhibitor treatment, ChIP (FUS at collagen IV promoter), FUS mutagenesis, cell-penetrating peptide, Itga1-null cell comparison\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — phosphorylation mapping, ChIP, mutagenesis, and functional rescue — single lab\",\n      \"pmids\": [\"32678881\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"ALS-mutant FUS condenses in axons and sequesters FMRP, promoting FMRP phase separation. This leads to repression of translation in mouse and human FUS-ALS motor neurons. FUS and FMRP co-partition in vitro and repress translation together. Translation of FMRP-bound RNAs is reduced in vivo in FUS-ALS motor neurons.\",\n      \"method\": \"Mouse and human iPSC-derived motor neuron models with endogenous knockin mutations, in vitro phase separation assays, translation assays, FMRP interaction studies\",\n      \"journal\": \"Science advances\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — endogenous knockin models plus in vitro reconstitution, human iPSC validation, multiple orthogonal methods\",\n      \"pmids\": [\"34290090\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"The FUS gene is dual-coding: an altORF nested in the FUS CDS encodes a conserved 170 amino acid protein (altFUS). altFUS (not FUS itself) is responsible for autophagy inhibition and is pivotal in mitochondrial potential loss and cytoplasmic aggregate accumulation induced by FUS overexpression. Suppression of altFUS in Drosophila protects against FUS-induced neurodegeneration.\",\n      \"method\": \"Ribosome profiling, altORF expression constructs, autophagy assays, mitochondrial membrane potential measurements, Drosophila genetics\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple cellular assays and Drosophila genetic validation, single lab study\",\n      \"pmids\": [\"33226175\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2021,\n      \"finding\": \"Crystal structure of the Kapβ2 (Karyopherin-β2/Transportin-1)·FUS(P525L) PY-NLS complex revealed fewer contacts at the mutation site, explaining decreased Kapβ2 affinity. FUS(R495X), despite missing the PY-NLS, binds Kapβ2 via its RGG2 and RGG3 tandem regions competing at the PY-NLS binding site, enabling nuclear localization when arginine methylation is inhibited. Kapβ2 binding also suppresses FUS LLPS.\",\n      \"method\": \"Crystal structure determination, biochemical binding assays, cell-based nuclear localization experiments, methylation inhibitor treatment\",\n      \"journal\": \"Scientific reports\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — crystal structure combined with biochemical and cell-based validation, mechanistic dissection of two distinct ALS mutants\",\n      \"pmids\": [\"33580145\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"Poly(ADP-ribose) (PAR) triggers FUS condensation at 1 nM concentration (1000-fold lower than RNA), through a transient (not stable) interaction with FUS that drives FUS oligomerization. Unlike RNA which stably associates with FUS, PAR interacts transiently. PAR and RNA co-condense with FUS via distinct mechanisms. Inhibition of PARP5a diminishes FUS condensation in cells.\",\n      \"method\": \"Single-molecule fluorescence assays, condensate formation assays, PARP5a inhibitor treatment, biochemical binding kinetics\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Strong — quantitative single-molecule and biochemical assays distinguishing PAR vs RNA binding modes, pharmacological validation in cells\",\n      \"pmids\": [\"35182479\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"The FUS::DDIT3 (FUS-CHOP) fusion oncoprotein in myxoid liposarcoma inhibits BAF (mSWI/SNF) complex-mediated chromatin remodeling at adipogenic enhancer sites by sequestering the adipogenic transcription factor CEBPB from the genome, generating a BAF complex loss-of-function phenotype without deleterious BAF subunit mutations.\",\n      \"method\": \"ChIP-seq, ATAC-seq, gene expression analysis, BAF ATPase inhibitor treatment, CEBPB co-IP, primary tumor genomics\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genome-wide chromatin profiling, protein interaction, pharmacological inhibition, and primary tumor validation — multiple orthogonal methods\",\n      \"pmids\": [\"35390276\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Endogenous FUS localizes to mitochondria and interacts with mitochondrial DNA Ligase IIIα (mtLig3), recruiting it to DNA damage sites within mitochondria to maintain mtDNA integrity. ALS-mutant FUS impairs this interaction, hindering mtLig3's repair role and causing increased mtDNA damage and mutations. Targeted introduction of human DNA Ligase 1 restores repair mechanisms and mitochondrial activity in FUS mutant cells.\",\n      \"method\": \"Co-immunoprecipitation (FUS-mtLig3), mtDNA damage assays, ALS patient iPSC-derived cells, transgenic mouse model, autopsy samples, DNA Ligase 1 rescue expression\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — direct protein interaction, functional DNA repair assay, multiple model systems (iPSC, transgenic mouse, patient autopsy), and rescue experiment\",\n      \"pmids\": [\"38461154\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"Reduction of m6A RNA modification (via METTL3 inhibitor STM-2457) decreases the number and accelerates dissolution of FUS-containing stress granules/cytoplasmic inclusions in neuronal cells, iPSC-derived motor neurons, and patient-derived fibroblasts expressing mutant FUS. Cells expressing mutant FUS show higher m6A levels, suggesting m6A homeostasis influences pathological FUS aggregate formation.\",\n      \"method\": \"METTL3 inhibitor treatment (STM-2457), stress granule imaging, m6A quantification, iPSC-derived motor neurons, patient fibroblasts, transcriptome analysis\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — pharmacological intervention with cellular readout across multiple model systems, single lab\",\n      \"pmids\": [\"38866783\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"FUS is a multifunctional nuclear RNA/DNA-binding protein that shuttles between nucleus and cytoplasm via Karyopherin-β2/Transportin-1-mediated import (through its C-terminal PY-NLS and, for truncation mutants, RGG regions); in the nucleus it binds RNA broadly via its zinc finger domain (rather than RRM), binds active chromatin through N-terminal self-assembly to activate transcription, represses both RNA Pol II-associated splicing (by recruiting SR proteins) and RNA Pol III transcription (via TBP interaction), autoregulates its own expression through intron retention and NMD, is phosphorylated at Ser42 by ATM and at its N-terminus by DNA-PK in response to DNA double-strand breaks, interacts with HDAC1 to support DSB repair signaling, and interacts with mtDNA Ligase IIIα to maintain mitochondrial DNA integrity; in the cytoplasm, FUS associates with the SMN-snRNP complex, regulates microRNA silencing through AGO2 interaction, mediates mTOR-dependent translational repression at polyribosomes, and undergoes phase separation/condensation that is potently triggered by transient PAR interactions and modulated by post-translational modifications including acetylation (K510 disrupts Transportin-1 binding; K315/K316 reduces RNA binding) and arginine methylation (in RGG domains), with ALS-linked mutations predominantly disrupting nuclear localization and causing cytoplasmic misaccumulation that impairs splicing, autoregulation, DDR, translation, and mitochondrial function.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"FUS is a multifunctional nucleocytoplasmic-shuttling RNA/DNA-binding protein that couples transcription, splicing, the DNA damage response, and translational control through regulated self-assembly and condensation [#0, #17]. It binds nucleic acids with limited sequence specificity—engaging diverse RNAs and single-stranded DNA primarily through its zinc finger rather than its RRM domain [#5, #20]—and its N-terminal QGSY-rich region drives self-assembly onto active chromatin to activate transcription [#17]. In the nucleus FUS binds RNA polymerase II via its N-terminus while recruiting SR splicing factors through its C-terminus to regulate pre-mRNA splicing [#2, #12], represses RNA polymerase III transcription through TBP [#8], and autoregulates its own levels by repressing exon 7 splicing to trigger nonsense-mediated decay [#14, #28]. FUS participates in the DNA double-strand break response, being phosphorylated at Ser42 by ATM and at its N-terminus by DNA-PK, recruited to break sites through HDAC1, and additionally localizing to mitochondria where it recruits DNA Ligase IIIα to maintain mtDNA integrity [#6, #16, #11, #35]. In the cytoplasm it associates with the SMN complex to support Gem formation, promotes microRNA silencing through AGO2, and mediates mTOR-dependent translational repression at stalled polyribosomes [#9, #23, #27]. FUS undergoes liquid-liquid phase separation that is potently triggered by transient poly(ADP-ribose) interactions and tuned by post-translational modifications, including K510 acetylation that disrupts Transportin-1 binding and arginine methylation of RGG regions [#33, #26, #32]. ALS-causing FUS mutations disrupt PY-NLS-dependent nuclear import and cause cytoplasmic mislocalization that impairs splicing, autoregulation, the DNA damage response, and translation, and seeds aberrant condensation that sequesters partners such as FMRP and kinesin-1 [#7, #32, #30, #22]. Distinct from neurodegeneration, FUS fusion oncoproteins (FUS-CHOP) drive liposarcoma, with the FUS domain required for transformation and the FUS::DDIT3 fusion antagonizing BAF/CEBPB-mediated adipogenic chromatin remodeling [#3, #4, #34].\",\n  \"teleology\": [\n    {\n      \"year\": 1994,\n      \"claim\": \"Established the bipartite molecular nature of FUS by showing it both binds RNA and harbors a transcriptional activation domain, framing it as a coupler of nucleic acid binding and gene expression.\",\n      \"evidence\": \"In vitro RNA binding and transactivation reporter assays on FUS and the TLS-ERG fusion\",\n      \"pmids\": [\"7970732\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Sequence specificity of RNA binding not resolved\", \"Endogenous transcriptional targets unidentified\"]\n    },\n    {\n      \"year\": 1997,\n      \"claim\": \"Resolved where and how FUS engages RNA in cells, defining it as a shuttling, largely non-sequence-specific hnRNP-like RNA chaperone.\",\n      \"evidence\": \"In vivo UV crosslinking, heterokaryon shuttling assays, and cellular fractionation\",\n      \"pmids\": [\"9264461\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Which domain dominates binding not yet defined\", \"Shuttling machinery not identified\"]\n    },\n    {\n      \"year\": 2000,\n      \"claim\": \"Connected FUS to the transcription-splicing interface and explained oncogenic dysregulation by showing FUS bridges RNA Pol II and SR factors, while FUS-CHOP overexpression drives liposarcoma requiring the FUS domain.\",\n      \"evidence\": \"Co-IP and CD44 splicing assays plus transgenic mouse liposarcoma models with domain-swap controls\",\n      \"pmids\": [\"10779324\", \"10828883\", \"11146553\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism of FUS-CHOP transformation at chromatin not defined\", \"In vivo splicing target set unknown\"]\n    },\n    {\n      \"year\": 2004,\n      \"claim\": \"Defined the structural architecture of FUS, identifying the zinc finger (not the RRM) as the principal structured RNA-recognition module amid disordered RGG regions.\",\n      \"evidence\": \"Limited proteolysis, CD, and NMR chemical shift mapping with GGUG RNA\",\n      \"pmids\": [\"15299008\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional consequence of zinc-finger binding in cells untested\", \"Role of disordered regions in binding unresolved\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Placed FUS within DNA damage signaling by identifying ATM-dependent Ser42 phosphorylation specifically after double-strand breaks.\",\n      \"evidence\": \"In vitro kinase assays, ATM inhibitors, and phospho-specific antibody detection\",\n      \"pmids\": [\"18620545\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Downstream consequence of Ser42 phosphorylation unclear\", \"Recruitment to break sites not yet shown\"]\n    },\n    {\n      \"year\": 2009,\n      \"claim\": \"Established FUS as an ALS gene whose disease mutations share a common cellular signature of cytoplasmic mislocalization.\",\n      \"evidence\": \"Familial ALS genetic sequencing with neuronal immunolocalization of mutant FUS\",\n      \"pmids\": [\"19251627\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism linking mislocalization to neurodegeneration unknown\", \"Import pathway disrupted by mutations not defined\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Extended FUS transcriptional control to RNA Pol III, showing it represses all three Pol III promoter classes, likely via TBP.\",\n      \"evidence\": \"In vitro transcription, ChIP, and siRNA/overexpression of FUS\",\n      \"pmids\": [\"19841068\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Direct FUS-TBP contact not structurally confirmed\", \"Physiological role of Pol III repression unclear\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Defined cytoplasmic and nuclear-body functions by linking FUS to the SMN complex and Gem formation, and mapped its transcriptome-wide binding around alternatively spliced exons.\",\n      \"evidence\": \"Co-IP, Gem counting in patient fibroblasts, and HITS-CLIP in mouse cerebrum\",\n      \"pmids\": [\"23022481\", \"22829983\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Functional outcome of Gem loss for motor neurons unclear\", \"Causality of CLIP-defined binding on splicing not all tested\"]\n    },\n    {\n      \"year\": 2013,\n      \"claim\": \"Built an integrated picture of nuclear FUS as a self-assembling, RNA-nucleated factor that controls Pol II CTD phosphorylation, autoregulates its own mRNA, and behaves abnormally in stress granules when mutated, while also identifying HDAC1 as the partner required for DSB recruitment.\",\n      \"evidence\": \"Assembly/EM assays, CLIP-seq autoregulation analysis, live-cell stress-granule imaging, and FUS-HDAC1 co-IP with DSB recruitment assays\",\n      \"pmids\": [\"24268778\", \"24204307\", \"24090136\", \"24036913\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How condensation properties relate to physiological function vs pathology unresolved\", \"Mechanism of HDAC1-dependent recruitment not detailed\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Resolved how FUS activates transcription and how DNA damage redistributes it, showing N-terminal self-assembly drives chromatin binding for transcription, while DNA-PK phosphorylation drives cytoplasmic translocation distinct from ATM signaling.\",\n      \"evidence\": \"Chromatin fractionation/ChIP with domain mutants and DNA-PK inhibitor experiments in primary neurons; plus FUS as an AR co-activator and activity-dependent regulation in neurons\",\n      \"pmids\": [\"25453086\", \"24899704\", \"21909421\", \"25324524\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Separation of chromatin-activation from splicing roles incompletely mapped\", \"Physiological trigger for DNA-PK-driven export in neurons unclear\"]\n    },\n    {\n      \"year\": 2015,\n      \"claim\": \"Quantitatively settled that FUS lacks strong sequence specificity and binds RNA preferentially over ssDNA and duplex nucleic acids.\",\n      \"evidence\": \"Filter binding and fluorescence polarization across candidate motifs and nucleic acid types\",\n      \"pmids\": [\"26150427\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How specificity is achieved in vivo unresolved\", \"Contribution of RNA structure to binding partly addressed\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Showed that cytoplasmic FUS inclusions disrupt RNA transport by sequestering kinesin-1 mRNA and protein, mechanistically linking condensation to cytoskeletal and trafficking defects.\",\n      \"evidence\": \"RNA localization microscopy, Hsp104 disaggregase and kinesin-1 rescue, and tubulin modification analysis\",\n      \"pmids\": [\"28298410\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Generalizability across neuronal RNA cargoes unclear\", \"Relationship to in vivo neurodegeneration not established\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Defined a cytoplasmic gene-silencing role by showing FUS partners with AGO2 to promote miRNA-mediated silencing, a function impaired by ALS truncation and conserved in C. elegans.\",\n      \"evidence\": \"FUS-AGO2 co-IP, reporter silencing assays, ALS mutant comparison, and fust-1 genetics\",\n      \"pmids\": [\"29499134\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Breadth of FUS-dependent miRNA targets unknown\", \"Mechanism of AGO2 cooperation not structurally defined\"]\n    },\n    {\n      \"year\": 2019,\n      \"claim\": \"Provided mutation-independent routes to FUS mislocalization and altered binding in ALS by showing FUS binds retained introns in SFPQ that export it, and shifts toward 3'UTR binding with ELAVL4 interaction in mutant motor neurons.\",\n      \"evidence\": \"RNA-IP/iCLIP in iPSC motor neurons, mouse models, and post-mortem ALS spinal cord\",\n      \"pmids\": [\"31368485\", \"31242416\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Causal contribution to disease onset unproven\", \"Single-lab binding maps await independent replication\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Established post-translational and translational control of FUS, identifying acetylation as a regulator of import and RNA binding, mTOR-dependent translational stalling, ALS-driven splicing loss-of-function, and EGFR-driven nuclear translocation activating collagen IV.\",\n      \"evidence\": \"Acetylation site mapping with Transportin-1 co-IP, polyribosome fractionation with Torin1, isogenic knockin/knockout RNA-seq, and tyrosine-phosphorylation/ChIP analyses\",\n      \"pmids\": [\"32691043\", \"33082139\", \"32479602\", \"32678881\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Crosstalk between acetylation, methylation, and phosphorylation unresolved\", \"In vivo relevance of EGFR-FUS-collagen axis untested in neurons\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Linked FUS condensation to translational repression and uncovered a hidden coding layer, showing mutant FUS sequesters FMRP to repress translation while a nested altFUS protein drives autophagy and mitochondrial defects.\",\n      \"evidence\": \"Knockin mouse/human motor neurons with in vitro phase separation and ribosome profiling/altORF constructs in Drosophila\",\n      \"pmids\": [\"34290090\", \"33226175\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Relative contribution of altFUS vs FUS to pathology unresolved\", \"FMRP co-repression target scope incompletely mapped\"]\n    },\n    {\n      \"year\": 2021,\n      \"claim\": \"Provided structural understanding of nuclear import disruption, showing how ALS mutations weaken or rewire Karyopherin-β2 binding and that this binding also suppresses FUS phase separation.\",\n      \"evidence\": \"Crystal structure of Kapβ2·FUS(P525L) PY-NLS with biochemical and cell-based localization assays\",\n      \"pmids\": [\"33580145\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Role of methylation in modulating import in vivo partly resolved\", \"Quantitative link between import defect and aggregation unmeasured\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Identified poly(ADP-ribose) as a potent, transient trigger of FUS condensation distinct from RNA, and recast the FUS-CHOP oncoprotein as a chromatin-remodeling antagonist that sequesters CEBPB from BAF complexes.\",\n      \"evidence\": \"Single-molecule condensation assays with PARP5a inhibition; ChIP-seq/ATAC-seq with CEBPB co-IP in myxoid liposarcoma\",\n      \"pmids\": [\"35182479\", \"35390276\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Physiological role of PAR-triggered condensation in DNA repair unresolved\", \"Therapeutic targetability of CEBPB sequestration untested\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Extended FUS function to mitochondrial genome maintenance and identified m6A as a modulator of pathological aggregation, showing FUS recruits DNA Ligase IIIα to mtDNA damage and that lowering m6A dissolves mutant FUS inclusions.\",\n      \"evidence\": \"FUS-mtLig3 co-IP with mtDNA repair and Ligase 1 rescue across iPSC/mouse/autopsy models; METTL3 inhibition with stress-granule imaging\",\n      \"pmids\": [\"38461154\", \"38866783\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism linking m6A levels to FUS condensation undefined\", \"Contribution of mtDNA damage to motor neuron death untested\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How FUS's many activities are coordinately switched in space and time, and which are the proximal drivers of neurodegeneration versus secondary consequences of mislocalization, remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model ranking splicing, DDR, translation, and mitochondrial defects by causal priority in ALS\", \"Physiological versus pathological roles of condensation not cleanly separated\", \"Interplay among acetylation, methylation, phosphorylation, and PAR in vivo undefined\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [0, 1, 5, 20]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [20, 35]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [1, 8, 17, 18, 29]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [2, 9, 23]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [0, 7, 17]},\n      {\"term_id\": \"GO:0005829\", \"supporting_discovery_ids\": [0, 7, 16, 27]},\n      {\"term_id\": \"GO:0000228\", \"supporting_discovery_ids\": [17, 6]},\n      {\"term_id\": \"GO:0005739\", \"supporting_discovery_ids\": [35]},\n      {\"term_id\": \"GO:0005840\", \"supporting_discovery_ids\": [27]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [2, 14, 23, 28]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [8, 17, 18, 29]},\n      {\"term_id\": \"R-HSA-73894\", \"supporting_discovery_ids\": [6, 11, 16, 35]},\n      {\"term_id\": \"R-HSA-1643685\", \"supporting_discovery_ids\": [7, 30, 34]},\n      {\"term_id\": \"R-HSA-392499\", \"supporting_discovery_ids\": [27, 30]}\n    ],\n    \"complexes\": [\"SMN-snRNP complex\", \"miRISC (AGO2)\"],\n    \"partners\": [\"AGO2\", \"HDAC1\", \"Transportin-1/Kapβ2\", \"SMN\", \"FMRP\", \"TBP\", \"ELAVL4\", \"DNA Ligase IIIα\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}