{"gene":"ZNF207","run_date":"2026-06-11T09:02:07","timeline":{"discoveries":[{"year":2014,"finding":"BuGZ/ZNF207 directly binds and stabilizes Bub3 via its conserved GLEBS domain, and uses a separate microtubule-binding domain to enhance Bub3 loading onto kinetochores during prometaphase, promoting chromosome alignment.","method":"Spemix screen for mitotic regulators, direct binding assays, domain dissection (GLEBS mutagenesis), kinetochore localization assays, chromosome alignment readout","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — replicated independently in two simultaneous papers (PMID:24462186 and PMID:24462187) using multiple orthogonal methods including domain mutants, co-IP, and functional rescue","pmids":["24462186","24462187"],"is_preprint":false},{"year":2014,"finding":"BuGZ/ZNF207 depletion causes loss of both Bub3 and Bub1 from kinetochores, reduces Bub1-dependent phosphorylation of centromeric histone H2A, attenuates kinetochore-based Aurora B kinase activity, and causes lethal chromosome congression defects.","method":"RNAi knockdown in human GBM cells, kinetochore localization immunofluorescence, phospho-H2A immunofluorescence, Aurora B activity assay, chromosome congression analysis","journal":"Developmental cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — multiple orthogonal functional readouts, replicated across two independent labs","pmids":["24462187"],"is_preprint":false},{"year":2017,"finding":"BuGZ promotes Aurora A (AurA) activation in mitosis: the two zinc fingers of BuGZ directly bind the kinase domain of AurA, allowing AurA to incorporate into BuGZ coacervates; mutant BuGZ defective in coacervation fails to promote AurA phosphorylation in Xenopus egg extracts.","method":"In vitro Aurora A kinase activation assay, direct binding (zinc-finger domain mutants), coacervation/phase separation assay with mutant BuGZ, Xenopus egg extract experiments, immunofluorescence of phospho-AurA on spindle MTs","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 1-2 / Moderate — in vitro reconstitution with mutagenesis plus Xenopus extract validation, single lab but multiple orthogonal methods","pmids":["29074706"],"is_preprint":false},{"year":2017,"finding":"BuGZ coacervation (liquid-liquid phase separation) promotes spindle matrix assembly; the intrinsically disordered BuGZ concentrates tubulin within coacervates to promote microtubule assembly.","method":"Phase separation assay in vitro, tubulin concentration measurement within coacervates, spindle assembly assays","journal":"The Journal of cell biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro reconstitution, single lab, referenced as background in PMID:29074706 and PMID:29263080","pmids":["29074706","29263080"],"is_preprint":false},{"year":2018,"finding":"In human embryonic stem cells, a distinct isoform of ZNF207 partners with master pluripotency transcription factors (OCT4, SOX2, NANOG) at the OCT4 enhancer to govern self-renewal and pluripotency, and directly regulates neuronal transcription factors including OTX2 to control ectoderm commitment; isoform switching underlies different roles during differentiation.","method":"Genome-wide proteomics/OCT4 enhancer pulldown, Co-IP, knockdown/rescue with isoform-specific constructs, differentiation assays","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — proteomics pulldown plus Co-IP plus functional isoform switching, single lab","pmids":["30349051"],"is_preprint":false},{"year":2020,"finding":"BuGZ kinetochore localization requires only its core GLEBS domain (distinct from Bub1/BubR1 requirements); BuGZ loads onto kinetochores prior to BubR1 and Bub1; before kinetochore formation, Bub3 is complexed with BuGZ but not with Bub1 or BubR1, indicating BuGZ stabilizes Bub3 and promotes initial Bub3 kinetochore loading that then facilitates Bub1 and BubR1 recruitment.","method":"GLEBS domain mutant series, live-cell kinetochore recruitment kinetics, size-exclusion chromatography of Bub3-containing complexes under different SAC signaling conditions","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal biochemistry (SEC) plus mutagenesis plus live-cell kinetics, single lab but multiple orthogonal methods","pmids":["32820050"],"is_preprint":false},{"year":2022,"finding":"The mitotic IDP BuGZ undergoes liquid-liquid phase separation in a phylogenetically conserved manner; six BuGZ homologs from diverse eukaryotes retain both LLPS ability and mitotic function despite low sequence conservation, indicating evolutionary selection for condensate formation coupled to mitotic function.","method":"Comparative sequence analysis, in vitro LLPS assays for six homologs, mitotic functional assays","journal":"Protein science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — multiple homologs tested in vitro, single lab, supports conservation of LLPS-mitotic function link","pmids":["34984754"],"is_preprint":false},{"year":2022,"finding":"In Neurospora crassa, BuGZ and Bub3 directly interact via the GLEBS domain of BuGZ; BuGZ binds directly to the cat-3 gene chromatin and represses catalase-3 transcription by hindering recruitment of transcription activators GCN4/CPC1 and NC2 complex, preventing assembly of transcriptional machinery; BuGZ protein amount (not its Bub3-interaction) determines cat-3 repression, and zinc finger domains are required for repression but not DNA binding.","method":"GLEBS domain mutants, ChIP, co-immunoprecipitation, cat-3 expression assays, transcriptional machinery recruitment assays, oxidative stress induction","journal":"PLoS genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — ChIP plus mutagenesis plus transcriptional readout, single lab in fungal model organism","pmids":["35666721"],"is_preprint":false},{"year":2023,"finding":"The FLOS domain of SETD1A directly binds BuGZ/BUB3; BuGZ/BUB3 localize to SETD1A-bound promoter-TSS regions and H3K4me1-positive enhancer regions in leukemia cells; both the GLEBS motif and intrinsically disordered region of BuGZ are required for SETD1A binding and leukemia cell proliferation.","method":"FLOS domain binding screen, Co-IP, ChIP-seq for BuGZ/BUB3 localization, BuGZ domain mutants (GLEBS, IDR), leukemia cell proliferation assays","journal":"EMBO reports","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct binding assay plus ChIP-seq plus functional domain mutants, single lab","pmids":["37535603"],"is_preprint":false},{"year":2023,"finding":"In Drosophila intestinal stem cells (ISCs), BuGZ forms age- and injury-associated condensates in ISC nuclei during interphase; BuGZ condensation promotes ISC proliferation and gut repair; m6A reader YT521-B acts as transcriptional and functional downstream of BuGZ; binding of YT521-B promoter or m6A writer Ime4/Mettl14 to BuGZ controls its coacervation.","method":"Live imaging of BuGZ condensates in Drosophila ISCs, RNAi knockdown, proliferation and gut repair assays, ChIP/promoter binding, co-immunoprecipitation with Ime4/Mettl14","journal":"Nature communications","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — live imaging plus genetic knockdowns plus binding assays, single lab in Drosophila model","pmids":["37872148"],"is_preprint":false},{"year":2024,"finding":"BuGZ interacts with Aurora-A to enhance its liquid-liquid phase separation and centrosome functions; Aurora-A condensation at centrosomes from prophase is mediated by conserved positive-charged residues in its IDR and intramolecular N-C terminus interaction; BuGZ enhances this LLPS and Aurora-A-dependent centrosome maturation, separation, and spindle pole function.","method":"In vitro LLPS assays, Aurora-A IDR and N/C-terminus deletion mutants, co-immunoprecipitation of BuGZ-Aurora-A, centrosome maturation and separation assays, live-cell imaging","journal":"iScience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro reconstitution plus mutagenesis plus Co-IP plus functional cellular assays, single lab","pmids":["38746663"],"is_preprint":false},{"year":2025,"finding":"ZNF207/BUGZ is covalently modified by parthenolide at Cys54 via Michael addition to its α-methylene-γ-lactone moiety; Cys54 is located within the second zinc-finger domain of the BUGZ microtubule-targeting region; this modification prevents kinetochore-microtubule attachment and disrupts chromosome congression without acting as a direct microtubule-targeting agent.","method":"Click-chemistry coupled quantitative mass spectrometry, covalent binding assay with parthenolide, kinetochore-microtubule attachment assays, chromosome congression imaging, microtubule-targeting assay (negative result for direct MT targeting)","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1 / Moderate — covalent modification site identified by MS with chemical biology plus functional cellular assays, single lab but multiple orthogonal methods","pmids":["40425854"],"is_preprint":false},{"year":2025,"finding":"ZNF207 depletion enhances canonical LMNA splicing and decreases progerin protein levels in patient-derived cells; ZNF207's zinc-finger domain broadly impacts alternative splicing through direct interactions with U1 snRNP components, positioning ZNF207 as a U1 snRNP auxiliary factor.","method":"CRASP-seq (CRISPR pooled screen + splicing reporter deep sequencing), ZNF207 depletion in progeria patient-derived cells, high-throughput mutagenesis of ZNF207 zinc-finger domain, direct interaction assays with U1 snRNP components","journal":"Molecular cell","confidence":"High","confidence_rationale":"Tier 2 / Strong — genome-scale CRISPR screen plus mutagenesis plus direct binding assay plus patient-derived cell validation, replicated across preprint and peer-reviewed publication","pmids":["41475346","40568141"],"is_preprint":false},{"year":2025,"finding":"hnRNPA1 binds ZNF207 mRNA and regulates ZNF207 exon 9 skipping; this alternative splicing of ZNF207 influences the PI3K/Akt/mTOR pathway in HCC cells.","method":"RIP assay (hnRNPA1-ZNF207 mRNA interaction), hnRNPA1 knockdown, RT-PCR for exon 9 splicing, Western blot for PI3K/Akt/mTOR pathway components","journal":"Frontiers in oncology","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single RIP assay plus knockdown, single lab, limited mechanistic follow-up on ZNF207 itself","pmids":["39834948"],"is_preprint":false},{"year":2025,"finding":"ZNF207 facilitates lactylation of PRDX1 at lysine 67, enhancing nuclear translocation and activation of NRF2, which creates a ferroptosis-resistant environment; ZNF207 knockdown restores ferroptosis sensitivity and disrupting PRDX1 lactylation or NRF2 activity reverses regorafenib resistance.","method":"CRISPR/Cas9 screen in RGF-treated HCC cells, functional assays (ZNF207 KD, PRDX1 K67 mutant), NRF2 nuclear translocation assay, ferroptosis assays","journal":"Drug resistance updates","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — CRISPR screen plus site-specific mutagenesis plus functional rescue, single lab","pmids":["40680452"],"is_preprint":false},{"year":2025,"finding":"ZNF207 transcriptionally regulates ENO1 and GAPDH expression, fostering aerobic glycolysis in HCC cells; shown by ChIP and dual-luciferase reporter assays.","method":"ChIP, dual-luciferase reporter gene assay, qPCR, overexpression/knockdown, in vivo xenograft","journal":"Cellular signalling","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — direct ChIP plus reporter assay, single lab","pmids":["40684964"],"is_preprint":false}],"current_model":"ZNF207/BuGZ is a multifunctional zinc finger protein that acts primarily as a mitotic regulator: it directly binds and stabilizes Bub3 via its GLEBS domain, loads onto kinetochores early in mitosis to facilitate subsequent Bub1 and BubR1 recruitment, binds microtubules through a separate domain, promotes Aurora A activation and phase separation within the spindle matrix, and uses liquid-liquid phase separation (coacervation of its disordered region) to assemble the spindle matrix and concentrate mitotic regulators; beyond mitosis, a distinct isoform partners with OCT4/SOX2/NANOG in pluripotent stem cells, its zinc-finger domain acts as a U1 snRNP auxiliary factor to broadly regulate alternative splicing, it can bind chromatin to repress transcription, and it facilitates PRDX1 lactylation and NRF2-mediated antioxidant responses in cancer cells."},"narrative":{"mechanistic_narrative":"ZNF207/BuGZ is a multifunctional intrinsically disordered zinc-finger protein that acts principally as a mitotic regulator coupling kinetochore assembly, spindle matrix formation, and liquid-liquid phase separation (LLPS) [PMID:24462186, PMID:24462187, PMID:29074706, PMID:29263080]. Through its conserved GLEBS domain it directly binds and stabilizes Bub3 and loads onto kinetochores ahead of Bub1 and BubR1, with pre-kinetochore Bub3 found complexed with BuGZ rather than Bub1/BubR1; this early Bub3 loading then licenses Bub1 and BubR1 recruitment, supports Bub1-dependent centromeric H2A phosphorylation and kinetochore Aurora B activity, and is required for chromosome congression [PMID:24462186, PMID:24462187, PMID:32820050]. Its disordered region drives coacervation that concentrates tubulin to build the spindle matrix and promote microtubule assembly, a property phylogenetically conserved alongside mitotic function across diverse eukaryotic homologs [PMID:29074706, PMID:29263080, PMID:34984754]. BuGZ also activates Aurora A: its two zinc fingers bind the Aurora A kinase domain and incorporate the kinase into coacervates, enhancing Aurora A LLPS at centrosomes and supporting centrosome maturation, separation, and spindle-pole function [PMID:29074706, PMID:38746663]. A cysteine (Cys54) within the second zinc finger of its microtubule-targeting region is covalently modified by parthenolide, which blocks kinetochore-microtubule attachment and chromosome congression [PMID:40425854]. Beyond mitosis, ZNF207 has nuclear gene-regulatory roles: its zinc-finger domain interacts with U1 snRNP components to broadly regulate alternative splicing, including canonical LMNA splicing where depletion reduces progerin [PMID:41475346, PMID:40568141]; a distinct isoform partners with OCT4/SOX2/NANOG at the OCT4 enhancer to control pluripotency and ectoderm commitment [PMID:30349051]; and it binds chromatin to repress transcription, as shown for cat-3 in Neurospora [PMID:35666721]. In cancer cells it associates with SETD1A at promoters and enhancers to support leukemia proliferation [PMID:37535603], transcriptionally drives glycolytic genes ENO1 and GAPDH [PMID:40684964], and facilitates PRDX1 K67 lactylation to activate NRF2 and confer ferroptosis resistance [PMID:40680452].","teleology":[{"year":2014,"claim":"Established BuGZ/ZNF207 as a core kinetochore factor by showing it directly binds and stabilizes Bub3 through its GLEBS domain and uses a separate microtubule-binding domain to load Bub3 onto kinetochores for chromosome alignment.","evidence":"Mitotic regulator screen with domain dissection, direct binding assays, and kinetochore/chromosome alignment readouts in human cells","pmids":["24462186","24462187"],"confidence":"High","gaps":["Did not define how the microtubule-binding and GLEBS activities are coordinated","Structural basis of the GLEBS-Bub3 interface not resolved"]},{"year":2014,"claim":"Connected BuGZ loss to downstream spindle assembly checkpoint signaling, showing depletion strips both Bub3 and Bub1 from kinetochores and attenuates Bub1-dependent H2A phosphorylation and Aurora B activity.","evidence":"RNAi in human GBM cells with kinetochore immunofluorescence, phospho-H2A staining, Aurora B activity assay, and congression analysis","pmids":["24462187"],"confidence":"High","gaps":["Whether effects are solely via Bub3 loading versus additional substrates unresolved","Did not address non-mitotic consequences of depletion"]},{"year":2017,"claim":"Revealed that BuGZ coacervation is mechanistically coupled to spindle assembly, concentrating tubulin within condensates and activating Aurora A by incorporating the kinase into coacervates.","evidence":"In vitro phase-separation and Aurora A activation assays with coacervation-defective mutants, Xenopus egg extracts, and zinc-finger binding mutants","pmids":["29074706","29263080"],"confidence":"High","gaps":["Spindle matrix assembly via LLPS validated mainly in vitro","Quantitative contribution of LLPS to in vivo spindle function not isolated"]},{"year":2018,"claim":"Extended ZNF207 function beyond mitosis by showing a distinct isoform partners with OCT4/SOX2/NANOG at the OCT4 enhancer to govern pluripotency and ectoderm commitment.","evidence":"OCT4 enhancer pulldown proteomics, Co-IP, and isoform-specific knockdown/rescue with differentiation assays in human ES cells","pmids":["30349051"],"confidence":"Medium","gaps":["Molecular determinants of isoform switching not defined","Direct DNA-binding versus adaptor role at the enhancer unclear"]},{"year":2020,"claim":"Clarified the temporal logic of kinetochore assembly, showing BuGZ loads via its core GLEBS domain ahead of Bub1/BubR1 and that pre-kinetochore Bub3 is complexed with BuGZ alone.","evidence":"GLEBS mutant series, live-cell recruitment kinetics, and size-exclusion chromatography of Bub3 complexes under varied SAC conditions","pmids":["32820050"],"confidence":"High","gaps":["Trigger for BuGZ release from kinetochores not defined","How BuGZ-Bub3 hand-off to Bub1/BubR1 is regulated unknown"]},{"year":2022,"claim":"Demonstrated that LLPS is an evolutionarily conserved, selected-for feature of BuGZ rather than an in vitro artifact, with six divergent homologs retaining both phase separation and mitotic function.","evidence":"Comparative sequence analysis with in vitro LLPS and mitotic functional assays across six eukaryotic homologs","pmids":["34984754"],"confidence":"Medium","gaps":["Does not establish which condensate clients are conserved","Sequence determinants of conserved LLPS not pinpointed"]},{"year":2022,"claim":"Uncovered a chromatin-repressive role, showing BuGZ binds cat-3 chromatin in Neurospora and represses transcription by hindering activator and NC2 recruitment, with zinc fingers required for repression but not DNA binding.","evidence":"GLEBS mutants, ChIP, Co-IP, and cat-3 expression/machinery recruitment assays under oxidative stress in Neurospora crassa","pmids":["35666721"],"confidence":"Medium","gaps":["Conservation of cat-3 repression to mammalian targets unestablished","How DNA-independent chromatin binding is achieved unknown"]},{"year":2023,"claim":"Linked BuGZ to a histone methyltransferase complex, showing the SETD1A FLOS domain binds BuGZ/BUB3 and that GLEBS and IDR are both required for SETD1A binding and leukemia proliferation.","evidence":"FLOS domain binding screen, Co-IP, ChIP-seq, and BuGZ domain mutants with leukemia proliferation assays","pmids":["37535603"],"confidence":"Medium","gaps":["Functional consequence of BuGZ on SETD1A methyltransferase activity not defined","Target genes mediating proliferation not enumerated"]},{"year":2023,"claim":"Showed interphase BuGZ condensation drives tissue regeneration, forming age- and injury-associated nuclear condensates in Drosophila ISCs that promote proliferation and gut repair via YT521-B.","evidence":"Live imaging of condensates, RNAi, proliferation/repair assays, and Co-IP with m6A machinery in Drosophila ISCs","pmids":["37872148"],"confidence":"Medium","gaps":["Mammalian relevance of interphase condensation untested","How m6A machinery controls coacervation mechanistically unclear"]},{"year":2024,"claim":"Refined the Aurora A relationship to a centrosomal axis, showing BuGZ enhances Aurora A LLPS to support centrosome maturation, separation, and spindle-pole function.","evidence":"In vitro LLPS assays, Aurora A IDR/N-C mutants, Co-IP, and centrosome maturation/separation assays with live imaging","pmids":["38746663"],"confidence":"Medium","gaps":["Stoichiometry of BuGZ-Aurora A in centrosomal condensates unknown","Separation of mitotic spindle versus centrosome roles incomplete"]},{"year":2025,"claim":"Identified a druggable covalent site, showing parthenolide modifies Cys54 in the second zinc finger to block kinetochore-microtubule attachment without acting as a direct microtubule agent.","evidence":"Click-chemistry quantitative MS, covalent binding assays, kinetochore-MT attachment and congression imaging in human cells","pmids":["40425854"],"confidence":"High","gaps":["How Cys54 modification mechanistically disrupts attachment not defined","Effect on non-mitotic ZNF207 functions untested"]},{"year":2025,"claim":"Defined a splicing-regulatory function, showing the zinc-finger domain interacts with U1 snRNP to broadly shape alternative splicing, including LMNA where depletion lowers progerin.","evidence":"CRASP-seq, depletion in progeria patient-derived cells, zinc-finger mutagenesis, and direct U1 snRNP interaction assays","pmids":["41475346","40568141"],"confidence":"High","gaps":["Genome-wide splicing target spectrum not fully mapped","Mechanism of U1 recruitment specificity unresolved"]},{"year":2025,"claim":"Implicated ZNF207 in cancer metabolic and stress-resistance programs, transcriptionally driving glycolytic genes and facilitating PRDX1 K67 lactylation to activate NRF2 and confer ferroptosis/regorafenib resistance.","evidence":"ChIP and dual-luciferase reporters for ENO1/GAPDH plus CRISPR screen with PRDX1 K67 mutant and ferroptosis rescue in HCC cells","pmids":["40684964","40680452"],"confidence":"Medium","gaps":["Whether glycolytic and lactylation roles are mechanistically linked unknown","How ZNF207 facilitates lactylation enzymatically not defined"]},{"year":null,"claim":"How a single intrinsically disordered zinc-finger protein partitions among its mitotic, splicing, chromatin-repressive, pluripotency, and cancer-metabolic functions — and whether LLPS is the common organizing principle across them — remains unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking isoform/domain usage to functional outcome","Tissue- and context-specific partner switching not systematically mapped"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[0,5]},{"term_id":"GO:0140110","term_label":"transcription regulator activity","supporting_discovery_ids":[4,7,15]},{"term_id":"GO:0003723","term_label":"RNA binding","supporting_discovery_ids":[12]},{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,5,8]},{"term_id":"GO:0003677","term_label":"DNA binding","supporting_discovery_ids":[7]}],"localization":[{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[4,7,9]},{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[10]},{"term_id":"GO:0005856","term_label":"cytoskeleton","supporting_discovery_ids":[0,3]}],"pathway":[{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[0,1,2,5,10,11]},{"term_id":"R-HSA-8953854","term_label":"Metabolism of RNA","supporting_discovery_ids":[12]},{"term_id":"R-HSA-74160","term_label":"Gene expression (Transcription)","supporting_discovery_ids":[4,7,8,15]},{"term_id":"R-HSA-1430728","term_label":"Metabolism","supporting_discovery_ids":[14,15]}],"complexes":["Bub3-BuGZ complex","spindle matrix","U1 snRNP (auxiliary factor)"],"partners":["BUB3","AURKA","SETD1A","OCT4","SOX2","NANOG","PRDX1"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"O43670","full_name":"BUB3-interacting and GLEBS motif-containing protein ZNF207","aliases":["Zinc finger protein 207"],"length_aa":478,"mass_kda":50.8,"function":"Kinetochore- and microtubule-binding protein that plays a key role in spindle assembly (PubMed:24462186, PubMed:24462187, PubMed:26388440). ZNF207/BuGZ is mainly composed of disordered low-complexity regions and undergoes phase transition or coacervation to form temperature-dependent liquid droplets. Coacervation promotes microtubule bundling and concentrates tubulin, promoting microtubule polymerization and assembly of spindle and spindle matrix by concentrating its building blocks (PubMed:26388440). Also acts as a regulator of mitotic chromosome alignment by mediating the stability and kinetochore loading of BUB3 (PubMed:24462186, PubMed:24462187). Mechanisms by which BUB3 is protected are unclear: according to a first report, ZNF207/BuGZ may act by blocking ubiquitination and proteasomal degradation of BUB3 (PubMed:24462186). According to another report, the stabilization is independent of the proteasome (PubMed:24462187)","subcellular_location":"Nucleus; Chromosome, centromere, kinetochore; Cytoplasm, cytoskeleton, spindle","url":"https://www.uniprot.org/uniprotkb/O43670/entry"},"depmap":{"release":"DepMap","has_data":true,"is_common_essential":true,"resolved_as":"","url":"https://depmap.org/portal/gene/ZNF207","classification":"Common Essential","n_dependent_lines":1158,"n_total_lines":1208,"dependency_fraction":0.9586092715231788},"opencell":{"profiled":false,"resolved_as":"","ensg_id":"","cell_line_id":"","localizations":[],"interactors":[{"gene":"SNRPA","stoichiometry":0.2},{"gene":"SNRPC","stoichiometry":0.2},{"gene":"SNRPF","stoichiometry":0.2}],"url":"https://opencell.sf.czbiohub.org/search/ZNF207","total_profiled":1310},"omim":[{"mim_id":"603428","title":"ZINC FINGER PROTEIN 207; ZNF207","url":"https://www.omim.org/entry/603428"}],"hpa":{"profiled":true,"resolved_as":"","reliability":"Enhanced","locations":[{"location":"Nucleoplasm","reliability":"Enhanced"}],"tissue_specificity":"Low tissue specificity","tissue_distribution":"Detected in all","driving_tissues":[],"url":"https://www.proteinatlas.org/search/ZNF207"},"hgnc":{"alias_symbol":["BuGZ"],"prev_symbol":[]},"alphafold":{"accession":"O43670","domains":[{"cath_id":"-","chopping":"11-98","consensus_level":"high","plddt":93.3576,"start":11,"end":98}],"viewer_url":"https://alphafold.ebi.ac.uk/entry/O43670","model_url":"https://alphafold.ebi.ac.uk/files/AF-O43670-F1-model_v6.cif","pae_url":"https://alphafold.ebi.ac.uk/files/AF-O43670-F1-predicted_aligned_error_v6.png","plddt_mean":59.94},"mouse_models":{"mgi_url":"https://www.informatics.jax.org/marker/summary?nomen=ZNF207","jax_strain_url":"https://www.jax.org/strain/search?query=ZNF207"},"sequence":{"accession":"O43670","fasta_url":"https://rest.uniprot.org/uniprotkb/O43670.fasta","uniprot_url":"https://www.uniprot.org/uniprotkb/O43670/entry","alphafold_viewer_url":"https://alphafold.ebi.ac.uk/entry/O43670"}},"corpus_meta":[{"pmid":"24462186","id":"PMC_24462186","title":"A microtubule-associated zinc finger protein, BuGZ, regulates mitotic chromosome alignment by ensuring Bub3 stability and kinetochore targeting.","date":"2014","source":"Developmental cell","url":"https://pubmed.ncbi.nlm.nih.gov/24462186","citation_count":82,"is_preprint":false},{"pmid":"24462187","id":"PMC_24462187","title":"BuGZ is required for Bub3 stability, Bub1 kinetochore function, and chromosome alignment.","date":"2014","source":"Developmental cell","url":"https://pubmed.ncbi.nlm.nih.gov/24462187","citation_count":70,"is_preprint":false},{"pmid":"29074706","id":"PMC_29074706","title":"Aurora A activation in mitosis promoted by BuGZ.","date":"2017","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/29074706","citation_count":40,"is_preprint":false},{"pmid":"30349051","id":"PMC_30349051","title":"A distinct isoform of ZNF207 controls self-renewal and pluripotency of human embryonic stem cells.","date":"2018","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/30349051","citation_count":39,"is_preprint":false},{"pmid":"35246476","id":"PMC_35246476","title":"System analysis based on the cancer-immunity cycle identifies ZNF207 as a novel immunotherapy target for hepatocellular carcinoma.","date":"2022","source":"Journal for immunotherapy of cancer","url":"https://pubmed.ncbi.nlm.nih.gov/35246476","citation_count":26,"is_preprint":false},{"pmid":"40680452","id":"PMC_40680452","title":"ZNF207-driven PRDX1 lactylation and NRF2 activation in regorafenib resistance and ferroptosis evasion.","date":"2025","source":"Drug resistance updates : reviews and commentaries in antimicrobial and anticancer chemotherapy","url":"https://pubmed.ncbi.nlm.nih.gov/40680452","citation_count":19,"is_preprint":false},{"pmid":"37872148","id":"PMC_37872148","title":"Phase separation of BuGZ regulates gut regeneration and aging through interaction with m6A regulators.","date":"2023","source":"Nature communications","url":"https://pubmed.ncbi.nlm.nih.gov/37872148","citation_count":16,"is_preprint":false},{"pmid":"34984754","id":"PMC_34984754","title":"Phylogenetic convergence of phase separation and mitotic function in the disordered protein BuGZ.","date":"2022","source":"Protein science : a publication of the Protein Society","url":"https://pubmed.ncbi.nlm.nih.gov/34984754","citation_count":10,"is_preprint":false},{"pmid":"28553202","id":"PMC_28553202","title":"A Systematic RNAi Screen Reveals a Novel Role of a Spindle Assembly Checkpoint Protein BuGZ in Synaptic Transmission in C. elegans.","date":"2017","source":"Frontiers in molecular neuroscience","url":"https://pubmed.ncbi.nlm.nih.gov/28553202","citation_count":10,"is_preprint":false},{"pmid":"32820050","id":"PMC_32820050","title":"BuGZ facilitates loading of spindle assembly checkpoint proteins to kinetochores in early mitosis.","date":"2020","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/32820050","citation_count":9,"is_preprint":false},{"pmid":"29263080","id":"PMC_29263080","title":"Phase separation of BuGZ promotes Aurora A activation and spindle assembly.","date":"2017","source":"The Journal of cell biology","url":"https://pubmed.ncbi.nlm.nih.gov/29263080","citation_count":9,"is_preprint":false},{"pmid":"37535603","id":"PMC_37535603","title":"SETD1A function in leukemia is mediated through interaction with mitotic regulators BuGZ/BUB3.","date":"2023","source":"EMBO reports","url":"https://pubmed.ncbi.nlm.nih.gov/37535603","citation_count":8,"is_preprint":false},{"pmid":"38377560","id":"PMC_38377560","title":"Discovery of Novel N-(Anthracen-9-ylmethyl) Benzamide Derivatives as ZNF207 Inhibitors Promising in Treating Glioma.","date":"2024","source":"Journal of medicinal 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ZNF207 in hepatocellular carcinoma and its significance].","date":"2019","source":"Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences","url":"https://pubmed.ncbi.nlm.nih.gov/31113916","citation_count":3,"is_preprint":false},{"pmid":"40425854","id":"PMC_40425854","title":"Parthenolide disrupts mitosis by inhibiting ZNF207/BUGZ-promoted kinetochore-microtubule attachment.","date":"2025","source":"The EMBO journal","url":"https://pubmed.ncbi.nlm.nih.gov/40425854","citation_count":2,"is_preprint":false},{"pmid":"41475346","id":"PMC_41475346","title":"RNA-coupled CRISPR screens reveal ZNF207 as a regulator of LMNA aberrant splicing in progeria.","date":"2025","source":"Molecular cell","url":"https://pubmed.ncbi.nlm.nih.gov/41475346","citation_count":2,"is_preprint":false},{"pmid":"39834948","id":"PMC_39834948","title":"Downregulation of hnRNPA1 inhibits hepatocellular carcinoma cell progression by modulating alternative splicing of ZNF207 exon 9.","date":"2025","source":"Frontiers in oncology","url":"https://pubmed.ncbi.nlm.nih.gov/39834948","citation_count":2,"is_preprint":false},{"pmid":"40568141","id":"PMC_40568141","title":"RNA-coupled CRISPR Screens Reveal ZNF207 as a Regulator of LMNA Aberrant Splicing in Progeria.","date":"2025","source":"bioRxiv : the preprint server for biology","url":"https://pubmed.ncbi.nlm.nih.gov/40568141","citation_count":0,"is_preprint":false},{"pmid":"41854173","id":"PMC_41854173","title":"Discovery, Optimization, and Biological Evaluation of 2-Cyano-2-(9H-xanthen-9-ylidene)acetamide Derivatives as ZNF207 Inhibitors for Anti-Glioma Therapy.","date":"2026","source":"Journal of medicinal chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/41854173","citation_count":0,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":11511,"output_tokens":4159,"usd":0.048459,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":12000,"output_tokens":4795,"usd":0.089938,"stage2_stop_reason":"end_turn"},"total_usd":0.138397,"stage1_batch_id":"msgbatch_01UT1AahFPCAyn2uVweS7A9z","stage2_batch_id":"msgbatch_01HuKWtKNT4Pqj1bc8eEP5RV","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2014,\n      \"finding\": \"BuGZ/ZNF207 directly binds and stabilizes Bub3 via its conserved GLEBS domain, and uses a separate microtubule-binding domain to enhance Bub3 loading onto kinetochores during prometaphase, promoting chromosome alignment.\",\n      \"method\": \"Spemix screen for mitotic regulators, direct binding assays, domain dissection (GLEBS mutagenesis), kinetochore localization assays, chromosome alignment readout\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — replicated independently in two simultaneous papers (PMID:24462186 and PMID:24462187) using multiple orthogonal methods including domain mutants, co-IP, and functional rescue\",\n      \"pmids\": [\"24462186\", \"24462187\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"BuGZ/ZNF207 depletion causes loss of both Bub3 and Bub1 from kinetochores, reduces Bub1-dependent phosphorylation of centromeric histone H2A, attenuates kinetochore-based Aurora B kinase activity, and causes lethal chromosome congression defects.\",\n      \"method\": \"RNAi knockdown in human GBM cells, kinetochore localization immunofluorescence, phospho-H2A immunofluorescence, Aurora B activity assay, chromosome congression analysis\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — multiple orthogonal functional readouts, replicated across two independent labs\",\n      \"pmids\": [\"24462187\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"BuGZ promotes Aurora A (AurA) activation in mitosis: the two zinc fingers of BuGZ directly bind the kinase domain of AurA, allowing AurA to incorporate into BuGZ coacervates; mutant BuGZ defective in coacervation fails to promote AurA phosphorylation in Xenopus egg extracts.\",\n      \"method\": \"In vitro Aurora A kinase activation assay, direct binding (zinc-finger domain mutants), coacervation/phase separation assay with mutant BuGZ, Xenopus egg extract experiments, immunofluorescence of phospho-AurA on spindle MTs\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1-2 / Moderate — in vitro reconstitution with mutagenesis plus Xenopus extract validation, single lab but multiple orthogonal methods\",\n      \"pmids\": [\"29074706\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"BuGZ coacervation (liquid-liquid phase separation) promotes spindle matrix assembly; the intrinsically disordered BuGZ concentrates tubulin within coacervates to promote microtubule assembly.\",\n      \"method\": \"Phase separation assay in vitro, tubulin concentration measurement within coacervates, spindle assembly assays\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro reconstitution, single lab, referenced as background in PMID:29074706 and PMID:29263080\",\n      \"pmids\": [\"29074706\", \"29263080\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"In human embryonic stem cells, a distinct isoform of ZNF207 partners with master pluripotency transcription factors (OCT4, SOX2, NANOG) at the OCT4 enhancer to govern self-renewal and pluripotency, and directly regulates neuronal transcription factors including OTX2 to control ectoderm commitment; isoform switching underlies different roles during differentiation.\",\n      \"method\": \"Genome-wide proteomics/OCT4 enhancer pulldown, Co-IP, knockdown/rescue with isoform-specific constructs, differentiation assays\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — proteomics pulldown plus Co-IP plus functional isoform switching, single lab\",\n      \"pmids\": [\"30349051\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2020,\n      \"finding\": \"BuGZ kinetochore localization requires only its core GLEBS domain (distinct from Bub1/BubR1 requirements); BuGZ loads onto kinetochores prior to BubR1 and Bub1; before kinetochore formation, Bub3 is complexed with BuGZ but not with Bub1 or BubR1, indicating BuGZ stabilizes Bub3 and promotes initial Bub3 kinetochore loading that then facilitates Bub1 and BubR1 recruitment.\",\n      \"method\": \"GLEBS domain mutant series, live-cell kinetochore recruitment kinetics, size-exclusion chromatography of Bub3-containing complexes under different SAC signaling conditions\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal biochemistry (SEC) plus mutagenesis plus live-cell kinetics, single lab but multiple orthogonal methods\",\n      \"pmids\": [\"32820050\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"The mitotic IDP BuGZ undergoes liquid-liquid phase separation in a phylogenetically conserved manner; six BuGZ homologs from diverse eukaryotes retain both LLPS ability and mitotic function despite low sequence conservation, indicating evolutionary selection for condensate formation coupled to mitotic function.\",\n      \"method\": \"Comparative sequence analysis, in vitro LLPS assays for six homologs, mitotic functional assays\",\n      \"journal\": \"Protein science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — multiple homologs tested in vitro, single lab, supports conservation of LLPS-mitotic function link\",\n      \"pmids\": [\"34984754\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2022,\n      \"finding\": \"In Neurospora crassa, BuGZ and Bub3 directly interact via the GLEBS domain of BuGZ; BuGZ binds directly to the cat-3 gene chromatin and represses catalase-3 transcription by hindering recruitment of transcription activators GCN4/CPC1 and NC2 complex, preventing assembly of transcriptional machinery; BuGZ protein amount (not its Bub3-interaction) determines cat-3 repression, and zinc finger domains are required for repression but not DNA binding.\",\n      \"method\": \"GLEBS domain mutants, ChIP, co-immunoprecipitation, cat-3 expression assays, transcriptional machinery recruitment assays, oxidative stress induction\",\n      \"journal\": \"PLoS genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — ChIP plus mutagenesis plus transcriptional readout, single lab in fungal model organism\",\n      \"pmids\": [\"35666721\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"The FLOS domain of SETD1A directly binds BuGZ/BUB3; BuGZ/BUB3 localize to SETD1A-bound promoter-TSS regions and H3K4me1-positive enhancer regions in leukemia cells; both the GLEBS motif and intrinsically disordered region of BuGZ are required for SETD1A binding and leukemia cell proliferation.\",\n      \"method\": \"FLOS domain binding screen, Co-IP, ChIP-seq for BuGZ/BUB3 localization, BuGZ domain mutants (GLEBS, IDR), leukemia cell proliferation assays\",\n      \"journal\": \"EMBO reports\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct binding assay plus ChIP-seq plus functional domain mutants, single lab\",\n      \"pmids\": [\"37535603\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2023,\n      \"finding\": \"In Drosophila intestinal stem cells (ISCs), BuGZ forms age- and injury-associated condensates in ISC nuclei during interphase; BuGZ condensation promotes ISC proliferation and gut repair; m6A reader YT521-B acts as transcriptional and functional downstream of BuGZ; binding of YT521-B promoter or m6A writer Ime4/Mettl14 to BuGZ controls its coacervation.\",\n      \"method\": \"Live imaging of BuGZ condensates in Drosophila ISCs, RNAi knockdown, proliferation and gut repair assays, ChIP/promoter binding, co-immunoprecipitation with Ime4/Mettl14\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — live imaging plus genetic knockdowns plus binding assays, single lab in Drosophila model\",\n      \"pmids\": [\"37872148\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2024,\n      \"finding\": \"BuGZ interacts with Aurora-A to enhance its liquid-liquid phase separation and centrosome functions; Aurora-A condensation at centrosomes from prophase is mediated by conserved positive-charged residues in its IDR and intramolecular N-C terminus interaction; BuGZ enhances this LLPS and Aurora-A-dependent centrosome maturation, separation, and spindle pole function.\",\n      \"method\": \"In vitro LLPS assays, Aurora-A IDR and N/C-terminus deletion mutants, co-immunoprecipitation of BuGZ-Aurora-A, centrosome maturation and separation assays, live-cell imaging\",\n      \"journal\": \"iScience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro reconstitution plus mutagenesis plus Co-IP plus functional cellular assays, single lab\",\n      \"pmids\": [\"38746663\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ZNF207/BUGZ is covalently modified by parthenolide at Cys54 via Michael addition to its α-methylene-γ-lactone moiety; Cys54 is located within the second zinc-finger domain of the BUGZ microtubule-targeting region; this modification prevents kinetochore-microtubule attachment and disrupts chromosome congression without acting as a direct microtubule-targeting agent.\",\n      \"method\": \"Click-chemistry coupled quantitative mass spectrometry, covalent binding assay with parthenolide, kinetochore-microtubule attachment assays, chromosome congression imaging, microtubule-targeting assay (negative result for direct MT targeting)\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — covalent modification site identified by MS with chemical biology plus functional cellular assays, single lab but multiple orthogonal methods\",\n      \"pmids\": [\"40425854\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ZNF207 depletion enhances canonical LMNA splicing and decreases progerin protein levels in patient-derived cells; ZNF207's zinc-finger domain broadly impacts alternative splicing through direct interactions with U1 snRNP components, positioning ZNF207 as a U1 snRNP auxiliary factor.\",\n      \"method\": \"CRASP-seq (CRISPR pooled screen + splicing reporter deep sequencing), ZNF207 depletion in progeria patient-derived cells, high-throughput mutagenesis of ZNF207 zinc-finger domain, direct interaction assays with U1 snRNP components\",\n      \"journal\": \"Molecular cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — genome-scale CRISPR screen plus mutagenesis plus direct binding assay plus patient-derived cell validation, replicated across preprint and peer-reviewed publication\",\n      \"pmids\": [\"41475346\", \"40568141\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"hnRNPA1 binds ZNF207 mRNA and regulates ZNF207 exon 9 skipping; this alternative splicing of ZNF207 influences the PI3K/Akt/mTOR pathway in HCC cells.\",\n      \"method\": \"RIP assay (hnRNPA1-ZNF207 mRNA interaction), hnRNPA1 knockdown, RT-PCR for exon 9 splicing, Western blot for PI3K/Akt/mTOR pathway components\",\n      \"journal\": \"Frontiers in oncology\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single RIP assay plus knockdown, single lab, limited mechanistic follow-up on ZNF207 itself\",\n      \"pmids\": [\"39834948\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ZNF207 facilitates lactylation of PRDX1 at lysine 67, enhancing nuclear translocation and activation of NRF2, which creates a ferroptosis-resistant environment; ZNF207 knockdown restores ferroptosis sensitivity and disrupting PRDX1 lactylation or NRF2 activity reverses regorafenib resistance.\",\n      \"method\": \"CRISPR/Cas9 screen in RGF-treated HCC cells, functional assays (ZNF207 KD, PRDX1 K67 mutant), NRF2 nuclear translocation assay, ferroptosis assays\",\n      \"journal\": \"Drug resistance updates\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — CRISPR screen plus site-specific mutagenesis plus functional rescue, single lab\",\n      \"pmids\": [\"40680452\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2025,\n      \"finding\": \"ZNF207 transcriptionally regulates ENO1 and GAPDH expression, fostering aerobic glycolysis in HCC cells; shown by ChIP and dual-luciferase reporter assays.\",\n      \"method\": \"ChIP, dual-luciferase reporter gene assay, qPCR, overexpression/knockdown, in vivo xenograft\",\n      \"journal\": \"Cellular signalling\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — direct ChIP plus reporter assay, single lab\",\n      \"pmids\": [\"40684964\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"ZNF207/BuGZ is a multifunctional zinc finger protein that acts primarily as a mitotic regulator: it directly binds and stabilizes Bub3 via its GLEBS domain, loads onto kinetochores early in mitosis to facilitate subsequent Bub1 and BubR1 recruitment, binds microtubules through a separate domain, promotes Aurora A activation and phase separation within the spindle matrix, and uses liquid-liquid phase separation (coacervation of its disordered region) to assemble the spindle matrix and concentrate mitotic regulators; beyond mitosis, a distinct isoform partners with OCT4/SOX2/NANOG in pluripotent stem cells, its zinc-finger domain acts as a U1 snRNP auxiliary factor to broadly regulate alternative splicing, it can bind chromatin to repress transcription, and it facilitates PRDX1 lactylation and NRF2-mediated antioxidant responses in cancer cells.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"ZNF207/BuGZ is a multifunctional intrinsically disordered zinc-finger protein that acts principally as a mitotic regulator coupling kinetochore assembly, spindle matrix formation, and liquid-liquid phase separation (LLPS) [#0, #3]. Through its conserved GLEBS domain it directly binds and stabilizes Bub3 and loads onto kinetochores ahead of Bub1 and BubR1, with pre-kinetochore Bub3 found complexed with BuGZ rather than Bub1/BubR1; this early Bub3 loading then licenses Bub1 and BubR1 recruitment, supports Bub1-dependent centromeric H2A phosphorylation and kinetochore Aurora B activity, and is required for chromosome congression [#0, #1, #5]. Its disordered region drives coacervation that concentrates tubulin to build the spindle matrix and promote microtubule assembly, a property phylogenetically conserved alongside mitotic function across diverse eukaryotic homologs [#3, #6]. BuGZ also activates Aurora A: its two zinc fingers bind the Aurora A kinase domain and incorporate the kinase into coacervates, enhancing Aurora A LLPS at centrosomes and supporting centrosome maturation, separation, and spindle-pole function [#2, #10]. A cysteine (Cys54) within the second zinc finger of its microtubule-targeting region is covalently modified by parthenolide, which blocks kinetochore-microtubule attachment and chromosome congression [#11]. Beyond mitosis, ZNF207 has nuclear gene-regulatory roles: its zinc-finger domain interacts with U1 snRNP components to broadly regulate alternative splicing, including canonical LMNA splicing where depletion reduces progerin [#12]; a distinct isoform partners with OCT4/SOX2/NANOG at the OCT4 enhancer to control pluripotency and ectoderm commitment [#4]; and it binds chromatin to repress transcription, as shown for cat-3 in Neurospora [#7]. In cancer cells it associates with SETD1A at promoters and enhancers to support leukemia proliferation [#8], transcriptionally drives glycolytic genes ENO1 and GAPDH [#15], and facilitates PRDX1 K67 lactylation to activate NRF2 and confer ferroptosis resistance [#14].\",\n  \"teleology\": [\n    {\n      \"year\": 2014,\n      \"claim\": \"Established BuGZ/ZNF207 as a core kinetochore factor by showing it directly binds and stabilizes Bub3 through its GLEBS domain and uses a separate microtubule-binding domain to load Bub3 onto kinetochores for chromosome alignment.\",\n      \"evidence\": \"Mitotic regulator screen with domain dissection, direct binding assays, and kinetochore/chromosome alignment readouts in human cells\",\n      \"pmids\": [\"24462186\", \"24462187\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define how the microtubule-binding and GLEBS activities are coordinated\", \"Structural basis of the GLEBS-Bub3 interface not resolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Connected BuGZ loss to downstream spindle assembly checkpoint signaling, showing depletion strips both Bub3 and Bub1 from kinetochores and attenuates Bub1-dependent H2A phosphorylation and Aurora B activity.\",\n      \"evidence\": \"RNAi in human GBM cells with kinetochore immunofluorescence, phospho-H2A staining, Aurora B activity assay, and congression analysis\",\n      \"pmids\": [\"24462187\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Whether effects are solely via Bub3 loading versus additional substrates unresolved\", \"Did not address non-mitotic consequences of depletion\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Revealed that BuGZ coacervation is mechanistically coupled to spindle assembly, concentrating tubulin within condensates and activating Aurora A by incorporating the kinase into coacervates.\",\n      \"evidence\": \"In vitro phase-separation and Aurora A activation assays with coacervation-defective mutants, Xenopus egg extracts, and zinc-finger binding mutants\",\n      \"pmids\": [\"29074706\", \"29263080\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Spindle matrix assembly via LLPS validated mainly in vitro\", \"Quantitative contribution of LLPS to in vivo spindle function not isolated\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Extended ZNF207 function beyond mitosis by showing a distinct isoform partners with OCT4/SOX2/NANOG at the OCT4 enhancer to govern pluripotency and ectoderm commitment.\",\n      \"evidence\": \"OCT4 enhancer pulldown proteomics, Co-IP, and isoform-specific knockdown/rescue with differentiation assays in human ES cells\",\n      \"pmids\": [\"30349051\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular determinants of isoform switching not defined\", \"Direct DNA-binding versus adaptor role at the enhancer unclear\"]\n    },\n    {\n      \"year\": 2020,\n      \"claim\": \"Clarified the temporal logic of kinetochore assembly, showing BuGZ loads via its core GLEBS domain ahead of Bub1/BubR1 and that pre-kinetochore Bub3 is complexed with BuGZ alone.\",\n      \"evidence\": \"GLEBS mutant series, live-cell recruitment kinetics, and size-exclusion chromatography of Bub3 complexes under varied SAC conditions\",\n      \"pmids\": [\"32820050\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Trigger for BuGZ release from kinetochores not defined\", \"How BuGZ-Bub3 hand-off to Bub1/BubR1 is regulated unknown\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Demonstrated that LLPS is an evolutionarily conserved, selected-for feature of BuGZ rather than an in vitro artifact, with six divergent homologs retaining both phase separation and mitotic function.\",\n      \"evidence\": \"Comparative sequence analysis with in vitro LLPS and mitotic functional assays across six eukaryotic homologs\",\n      \"pmids\": [\"34984754\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Does not establish which condensate clients are conserved\", \"Sequence determinants of conserved LLPS not pinpointed\"]\n    },\n    {\n      \"year\": 2022,\n      \"claim\": \"Uncovered a chromatin-repressive role, showing BuGZ binds cat-3 chromatin in Neurospora and represses transcription by hindering activator and NC2 recruitment, with zinc fingers required for repression but not DNA binding.\",\n      \"evidence\": \"GLEBS mutants, ChIP, Co-IP, and cat-3 expression/machinery recruitment assays under oxidative stress in Neurospora crassa\",\n      \"pmids\": [\"35666721\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Conservation of cat-3 repression to mammalian targets unestablished\", \"How DNA-independent chromatin binding is achieved unknown\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Linked BuGZ to a histone methyltransferase complex, showing the SETD1A FLOS domain binds BuGZ/BUB3 and that GLEBS and IDR are both required for SETD1A binding and leukemia proliferation.\",\n      \"evidence\": \"FLOS domain binding screen, Co-IP, ChIP-seq, and BuGZ domain mutants with leukemia proliferation assays\",\n      \"pmids\": [\"37535603\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of BuGZ on SETD1A methyltransferase activity not defined\", \"Target genes mediating proliferation not enumerated\"]\n    },\n    {\n      \"year\": 2023,\n      \"claim\": \"Showed interphase BuGZ condensation drives tissue regeneration, forming age- and injury-associated nuclear condensates in Drosophila ISCs that promote proliferation and gut repair via YT521-B.\",\n      \"evidence\": \"Live imaging of condensates, RNAi, proliferation/repair assays, and Co-IP with m6A machinery in Drosophila ISCs\",\n      \"pmids\": [\"37872148\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Mammalian relevance of interphase condensation untested\", \"How m6A machinery controls coacervation mechanistically unclear\"]\n    },\n    {\n      \"year\": 2024,\n      \"claim\": \"Refined the Aurora A relationship to a centrosomal axis, showing BuGZ enhances Aurora A LLPS to support centrosome maturation, separation, and spindle-pole function.\",\n      \"evidence\": \"In vitro LLPS assays, Aurora A IDR/N-C mutants, Co-IP, and centrosome maturation/separation assays with live imaging\",\n      \"pmids\": [\"38746663\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Stoichiometry of BuGZ-Aurora A in centrosomal condensates unknown\", \"Separation of mitotic spindle versus centrosome roles incomplete\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Identified a druggable covalent site, showing parthenolide modifies Cys54 in the second zinc finger to block kinetochore-microtubule attachment without acting as a direct microtubule agent.\",\n      \"evidence\": \"Click-chemistry quantitative MS, covalent binding assays, kinetochore-MT attachment and congression imaging in human cells\",\n      \"pmids\": [\"40425854\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How Cys54 modification mechanistically disrupts attachment not defined\", \"Effect on non-mitotic ZNF207 functions untested\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Defined a splicing-regulatory function, showing the zinc-finger domain interacts with U1 snRNP to broadly shape alternative splicing, including LMNA where depletion lowers progerin.\",\n      \"evidence\": \"CRASP-seq, depletion in progeria patient-derived cells, zinc-finger mutagenesis, and direct U1 snRNP interaction assays\",\n      \"pmids\": [\"41475346\", \"40568141\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Genome-wide splicing target spectrum not fully mapped\", \"Mechanism of U1 recruitment specificity unresolved\"]\n    },\n    {\n      \"year\": 2025,\n      \"claim\": \"Implicated ZNF207 in cancer metabolic and stress-resistance programs, transcriptionally driving glycolytic genes and facilitating PRDX1 K67 lactylation to activate NRF2 and confer ferroptosis/regorafenib resistance.\",\n      \"evidence\": \"ChIP and dual-luciferase reporters for ENO1/GAPDH plus CRISPR screen with PRDX1 K67 mutant and ferroptosis rescue in HCC cells\",\n      \"pmids\": [\"40684964\", \"40680452\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether glycolytic and lactylation roles are mechanistically linked unknown\", \"How ZNF207 facilitates lactylation enzymatically not defined\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How a single intrinsically disordered zinc-finger protein partitions among its mitotic, splicing, chromatin-repressive, pluripotency, and cancer-metabolic functions — and whether LLPS is the common organizing principle across them — remains unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking isoform/domain usage to functional outcome\", \"Tissue- and context-specific partner switching not systematically mapped\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [0, 5]},\n      {\"term_id\": \"GO:0140110\", \"supporting_discovery_ids\": [4, 7, 15]},\n      {\"term_id\": \"GO:0003723\", \"supporting_discovery_ids\": [12]},\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 5, 8]},\n      {\"term_id\": \"GO:0003677\", \"supporting_discovery_ids\": [7]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [4, 7, 9]},\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [10]},\n      {\"term_id\": \"GO:0005856\", \"supporting_discovery_ids\": [0, 3]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [0, 1, 2, 5, 10, 11]},\n      {\"term_id\": \"R-HSA-8953854\", \"supporting_discovery_ids\": [12]},\n      {\"term_id\": \"R-HSA-74160\", \"supporting_discovery_ids\": [4, 7, 8, 15]},\n      {\"term_id\": \"R-HSA-1430728\", \"supporting_discovery_ids\": [14, 15]}\n    ],\n    \"complexes\": [\"Bub3-BuGZ complex\", \"spindle matrix\", \"U1 snRNP (auxiliary factor)\"],\n    \"partners\": [\"BUB3\", \"AURKA\", \"SETD1A\", \"OCT4\", \"SOX2\", \"NANOG\", \"PRDX1\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":7,"faith_total":7,"faith_pct":100.0}}