{"gene":"NDE1","run_date":"2026-06-10T05:19:52","timeline":{"discoveries":[{"year":2010,"finding":"NDE1 stably recruits LIS1 to the dynein holoenzyme molecule, where LIS1 interacts with the motor domain during the prepowerstroke state of the dynein crossbridge cycle. NDE1 alone abrogates dynein force production, whereas LIS1 alone or with NDE1 induces a persistent-force dynein state that improves ensemble function of multiple dyneins under high-load conditions.","method":"Single-molecule force measurements, optical trapping, biochemical reconstitution with purified proteins","journal":"Cell","confidence":"High","confidence_rationale":"Tier 1 / Strong — in vitro reconstitution with purified proteins and single-molecule force measurements; rigorous mechanistic dissection in a single high-impact study","pmids":["20403325"],"is_preprint":false},{"year":2004,"finding":"Ablation of Nde1 in mouse results in microcephaly with defects in centrosome duplication, mitotic spindle assembly, mitotic progression, and mitotic orientation in cortical progenitors, demonstrating Nde1 is essential for these processes in vivo.","method":"Knockout mouse model, BrdU birthdating, in vitro centrosome duplication assays, immunostaining","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 2 / Strong — clean KO mouse with multiple orthogonal phenotypic readouts plus in vitro functional assays; independently replicated by subsequent studies","pmids":["15473967"],"is_preprint":false},{"year":2011,"finding":"NDE1 is a negative regulator of ciliary length; it is expressed at high levels in mitosis and low levels in quiescence, localizes at the mother centriole, and cells depleted of NDE1 have longer cilia and a delay in cell cycle re-entry that correlates with ciliary length.","method":"siRNA knockdown, live imaging, immunofluorescence localization, zebrafish morpholino knockdown","journal":"Nature cell biology","confidence":"High","confidence_rationale":"Tier 2 / Strong — RNAi in mammalian cells plus in vivo zebrafish validation; multiple orthogonal methods across two systems","pmids":["21394081"],"is_preprint":false},{"year":2011,"finding":"Human NDE1 mutations truncating C-terminal domains render the protein unstable, unable to bind cytoplasmic dynein, and unable to localize to the centrosome. CDK1 phosphorylation at T246 within the C-terminal region is required for cell-cycle progression from G2 to M phase.","method":"Patient cell lines, transfection of tagged mutant constructs, co-immunoprecipitation, immunofluorescence, cell cycle assays, in vitro kinase assay","journal":"American journal of human genetics","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — patient-derived mutations studied with multiple functional assays (binding, localization, cell cycle) in a single rigorous study","pmids":["21529751"],"is_preprint":false},{"year":2007,"finding":"CENP-F interacts with both NDE1 and NDEL1, and recruits NDE1, NDEL1, and LIS1 to kinetochores. NDE1, but not NDEL1, is specifically required for kinetochore localization of dynein. Suppression of NDE1 inhibits metaphase chromosome alignment and activates the spindle checkpoint.","method":"Co-immunoprecipitation, siRNA knockdown, immunofluorescence, live cell imaging","journal":"Current biology : CB","confidence":"High","confidence_rationale":"Tier 2 / Moderate — reciprocal Co-IP plus RNAi with defined functional readouts; two orthogonal methods in single lab","pmids":["17600710"],"is_preprint":false},{"year":2007,"finding":"NDE1 and NDEL1 each localize to mitotic kinetochores before dynein and other kinetochore components; inhibition of both causes metaphase arrest with misoriented chromosomes. Dynein interacts with NDE1 through the dynein intermediate and light chains (not the motor domain). NDE1/NDEL1 are required for dynein and dynactin recruitment to kinetochores.","method":"Antibody injection, immunofluorescence, co-immunoprecipitation, live cell imaging","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 2 / Moderate — antibody injection epistasis, reciprocal Co-IP mapping the dynein subunit interaction, plus defined mitotic phenotype readouts","pmids":["17682047"],"is_preprint":false},{"year":2011,"finding":"NDE1 competes with dynactin for binding to a common region within the dynein intermediate chain (IC), providing a mechanism for mutually exclusive regulation of individual dynein molecules. LC8 binds to a novel sequence within NDE1 without detectably affecting the dynein-NDE1 interaction.","method":"Co-immunoprecipitation, pull-down assays, competition binding assays with purified proteins","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 1–2 / Weak — in vitro binding competition with purified proteins; single lab, single study","pmids":["21911489"],"is_preprint":false},{"year":2010,"finding":"NDE1 and NDEL1 depletion together causes striking dispersal of Golgi complex and endocytic compartments and complete loss of dynein from membranes, placing NDE1 and NDEL1 upstream of LIS1 in dynein recruitment/activation on membranes. A substantial portion of NDE1 and NDEL1 is membrane-associated. Expression of exogenous NDE1 can rescue LIS1 depletion effects on Golgi, but LIS1 only partially rescues NDE1/NDEL1 depletion.","method":"siRNA knockdown, immunofluorescence, subcellular fractionation, rescue experiments","journal":"Journal of cell science","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — systematic RNAi with genetic epistasis (rescue experiments) establishing pathway order; single lab","pmids":["20048338"],"is_preprint":false},{"year":2011,"finding":"PKA phosphorylates NDE1 at threonine-131 (T131) in a manner dependent on DISC1 and PDE4. Phosphorylation at T131 modulates NDE1-LIS1 and NDE1-NDEL1 interactions. T131-phosphorylated NDE1 localizes to the postsynaptic density, proximal axons, nucleus, and centrosome (enriched during mitosis). Mutation mimicking T131 phosphorylation inhibits neurite outgrowth.","method":"In vitro kinase assays, homology modeling, co-immunoprecipitation, immunofluorescence, neurite outgrowth assay, phospho-specific antibody","journal":"The Journal of neuroscience","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro kinase assay plus functional assays for binding and neurite outgrowth; single lab, multiple methods","pmids":["21677187"],"is_preprint":false},{"year":2015,"finding":"FBW7 is the E3 ubiquitin ligase that mediates destruction of NDE1 upon entry into G1, with CDK5 priming NDE1 for FBW7-mediated recognition. NDE1 levels inversely correlate with ciliogenesis, and this CDK5-FBW7-NDE1 pathway controls ciliary length in a cell cycle-dependent manner.","method":"Co-immunoprecipitation, siRNA knockdown, ubiquitylation assays, rescue epistasis experiments, immunofluorescence","journal":"The EMBO journal","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — ubiquitylation assays identifying the E3 ligase and priming kinase, plus genetic epistasis (double knockdown rescue); multiple orthogonal methods","pmids":["26206584"],"is_preprint":false},{"year":2006,"finding":"NDE1 forms a complex with centrosomal protein Su48; NDE1 is phosphorylated by Cdc2 in vivo at six putative phosphorylation sites, and mutation of these sites diminishes Cdc2 phosphorylation, affects stability of Su48-NDE1 interactions, and alters centrosomal localization of NDE1. Ablation of NDE1 by siRNA causes mitotic delay and cell death.","method":"Yeast two-hybrid, co-immunoprecipitation, in vitro kinase assay, site-directed mutagenesis, siRNA knockdown, immunofluorescence","journal":"Oncogene","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — in vitro kinase assay with mutagenesis plus Co-IP and functional knockdown; single lab, multiple methods","pmids":["16682949"],"is_preprint":false},{"year":2006,"finding":"NDE1 interacts with p78/MCRS1, and this interaction is regulated by phosphorylation on NDE1. A fraction of p78 localizes to the centrosome, and the forkhead-associated domain of p78 mediates its association with NDE1 and its centrosomal localization.","method":"Yeast two-hybrid, co-immunoprecipitation, immunofluorescence, siRNA knockdown","journal":"Oncogene","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, yeast two-hybrid plus Co-IP, limited mechanistic follow-up","pmids":["16547491"],"is_preprint":false},{"year":2008,"finding":"NDE1 and NDEL1 show opposing binding patterns to DISC1 Ser704 versus Cys704 at the same DISC1 binding domain, suggesting competitive binding to DISC1.","method":"In vitro binding assays, co-immunoprecipitation","journal":"Human molecular genetics","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single Co-IP/binding assay method","pmids":["18469341"],"is_preprint":false},{"year":2008,"finding":"NDE1, NDEL1, and LIS1, together with dynein, associate with DISC1, PDE4B, and PDE4D within cells, and this complex is present at the centrosome. NDE1 is phosphorylated by PKA.","method":"Co-immunoprecipitation, immunofluorescence in cultured neurons","journal":"Biochemical and biophysical research communications","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single Co-IP study, single lab; PKA phosphorylation not confirmed by in vitro kinase assay in this paper","pmids":["18983980"],"is_preprint":false},{"year":2016,"finding":"NDE1 shRNA in rat embryonic brains causes cell cycle arrest at three distinct stages: apical interkinetic nuclear migration, the G2-to-M transition, and regulation of primary cilia at G1-to-S. NDEL1 RNAi has no such effects, but NDEL1 overexpression can compensate for NDE1 loss except at the G2-to-M transition, revealing a unique NDE1 role at this transition.","method":"In utero electroporation of shRNA, immunofluorescence, BrdU/EdU pulse labeling, rescue by NDEL1 overexpression","journal":"Nature communications","confidence":"High","confidence_rationale":"Tier 2 / Strong — in vivo RNAi with multiple cell cycle stage readouts plus specific rescue experiments distinguishing NDE1 from NDEL1; replicated across multiple stages","pmids":["27553190"],"is_preprint":false},{"year":2014,"finding":"NDE1 has a nuclear pool and interacts with cohesin and its associated chromatin remodeler; loss of NDE1 causes stalled DNA replication specifically in mid-late S phase at heterochromatin domains, leading to DNA double-strand breaks and p53-dependent apoptosis in neural progenitors.","method":"Co-immunoprecipitation, immunofluorescence, BrdU pulse labeling, DNA damage markers (γH2AX), Nde1 mutant mouse neural progenitors","journal":"eLife","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP plus multiple functional readouts in primary neural progenitors; single lab","pmids":["25245017"],"is_preprint":false},{"year":2011,"finding":"NDE1 interacts directly with utrophin/dystrophin, allowing assembly of a multi-protein complex that links the cytoskeleton to the extracellular matrix of radial glia, stabilizing their lateral membrane, cell-cell adhesion, and radial morphology. Lis1-Nde1 mutations destabilize the dystrophin/dystroglycan glycoprotein complex (DGC).","method":"Co-immunoprecipitation, immunofluorescence, genetic epistasis (double mutant mice), rescue experiments","journal":"PLoS biology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP identifying direct interaction plus genetic epistasis in vivo; single lab","pmids":["22028625"],"is_preprint":false},{"year":2013,"finding":"The Nde1-Lis1 complex regulates MAPK signaling threshold through a direct interaction between Lis1 and Brap, a MAPK signaling threshold modulator. Nde1-Lis1 deficiency results in spatially dependent hyperactivation of MAPK and altered Ksr scaffold levels; epistasis analyses support synergistic Brap and Lis1 functions.","method":"Co-immunoprecipitation, immunofluorescence, genetic epistasis (double mutant mouse CNS), MAPK pathway assays","journal":"Developmental cell","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — Co-IP plus in vivo genetic epistasis; single lab","pmids":["23673330"],"is_preprint":false},{"year":2012,"finding":"NDE1 forms needle-like dimers, tetramers, and chain-like polymers in solution. The C-terminal domain adopts a folded-back structure that facilitates interaction with the N-terminal coiled-coil and is required for binding dynein and DISC1. NDE1 and NDEL1 can interact directly in mixed complexes.","method":"Negative stain electron microscopy, chemical cross-linking/mass spectrometry, isotope labeling","journal":"The Journal of biological chemistry","confidence":"Medium","confidence_rationale":"Tier 1 / Weak — structural/biophysical characterization; single lab, no functional validation of structure-function in same study","pmids":["22843697"],"is_preprint":false},{"year":2012,"finding":"NDE1 binds the dynein intermediate chain (IC) at its N-terminal coiled-coil domain; the NDE1-binding site on IC overlaps with but is distinct from the p150(Glued) (dynactin) binding site. NDE1 and p150(Glued) show distinct binding modes: NDE1 contacts only region 1 of the bi-segmental IC binding site, whereas p150(Glued) requires both regions. When all three proteins are present, IC preferentially binds p150(Glued).","method":"Isothermal titration calorimetry, NMR spectroscopy, in vitro binding assays with purified proteins","journal":"The Journal of biological chemistry","confidence":"High","confidence_rationale":"Tier 1 / Moderate — ITC and NMR with purified proteins providing atomic-level mapping; rigorous biophysical methods in single study","pmids":["22669947"],"is_preprint":false},{"year":2017,"finding":"The crystal structure of the DISC1 C-terminal tail in complex with the Ndel1 binding domain was solved. DISC1 regulates Ndel1 kinetochore attachment (but not centrosome localization) during mitosis. Disrupting DISC1/Ndel1 complex formation prolongs mitotic length and causes cell-cycle deficits of radial glial cells in embryonic mouse cortex and human forebrain organoids.","method":"X-ray crystallography, co-immunoprecipitation, immunofluorescence, in utero electroporation, human iPSC-derived organoids","journal":"Neuron","confidence":"High","confidence_rationale":"Tier 1 / Strong — high-resolution crystal structure combined with multiple functional validations in cells, mouse, and human organoids; multiple orthogonal methods","pmids":["29103808"],"is_preprint":false},{"year":2018,"finding":"CDK1 phosphorylates Nde1 to control its cargo-binding throughout the cell cycle. Phospho-Nde1 specifically associates with the late G2-M nuclear envelope and prophase-to-anaphase kinetochores. Phosphomutant Nde1 shows weaker CENP-F binding in vitro, and CENP-F is identified as the first well-characterized Nde1 cargo protein. Expression of dynein-binding-deficient Nde1 reduces kinetochore dynein by half, establishing Nde1 as a major contributor to kinetochore dynein recruitment.","method":"Nde1 RNAi, phosphomimetic/phosphomutant cDNA rescue, phospho-specific antibody, in vitro CENP-F binding assay, immunofluorescence","journal":"The Journal of cell biology","confidence":"High","confidence_rationale":"Tier 1–2 / Moderate — in vitro binding assay with mutagenesis plus cell-based rescue experiments using phospho-mutants; multiple orthogonal methods in single lab","pmids":["29930206"],"is_preprint":false},{"year":2016,"finding":"NDE1 and dynactin form mutually exclusive complexes with dynein and show non-overlapping distributions in T cells. NDE1/dynein accumulation at the immunological synapse is required for MTOC translocation, while the dynein/dynactin complex is required for lytic granule accumulation at the synapse. Dominant-negative NDE1 or NDE1 knockdown blocks MTOC translocation and CTL-mediated killing.","method":"Dominant-negative expression, siRNA knockdown, immunofluorescence, cytotoxicity assays in Jurkat cells and primary CTLs","journal":"Journal of immunology","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — dominant-negative and RNAi with defined functional readouts in two cell systems; single lab","pmids":["27534551"],"is_preprint":false},{"year":2014,"finding":"NDE1 rare variant S214F affects axonal outgrowth and disrupts the interaction between NDE1 and YWHAE (14-3-3 epsilon) in functional assays.","method":"Functional binding assays, neurite/axonal outgrowth assay with mutant NDE1","journal":"Schizophrenia bulletin","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single lab, single binding assay plus neurite outgrowth; limited mechanistic follow-up","pmids":["25332407"],"is_preprint":false},{"year":2008,"finding":"Lis1 and Nde1 collaborate to regulate the fate of radial glial progenitors; double Lis1-Nde1 mutant mice show dose-dependent cortical size reduction and delamination, dramatically increased neuronal differentiation at corticogenesis onset, and striking changes in metaphase progenitor morphology with reduced apical attachment, impairing cell division asymmetry control.","method":"Allelic series double mutant mouse analysis, immunostaining, BrdU birthdating, cleavage plane orientation analysis","journal":"Human molecular genetics","confidence":"Medium","confidence_rationale":"Tier 2 / Moderate — genetic epistasis using allelic series of double mutants with multiple readouts; single lab","pmids":["18469343"],"is_preprint":false},{"year":2014,"finding":"Nde1, but not Ndel1, is localized to putative SVZ stem cells and actively dividing progenitors of the SGZ. Increasing Nde1 expression in hippocampal neural stem cells leads to increased neuronal differentiation and decreased astroglial differentiation.","method":"Immunofluorescence localization, overexpression in neural stem cell line, differentiation assay","journal":"Neuroscience","confidence":"Low","confidence_rationale":"Tier 3 / Weak — single localization and overexpression study; single lab, limited mechanistic depth","pmids":["24785679"],"is_preprint":false}],"current_model":"NDE1 is a centrosomal and kinetochore-associated scaffold protein that recruits LIS1 to the dynein holoenzyme (promoting a persistent force-generating dynein state), recruits dynein to kinetochores via interaction with CENP-F and the dynein intermediate/light chains, negatively regulates ciliary length from the mother centriole (with its abundance controlled by CDK5-FBW7-mediated ubiquitylation during G1), undergoes cell cycle-dependent phosphorylation by CDK1 (controlling cargo binding and kinetochore association) and PKA (modulating LIS1 and NDEL1 interactions in a DISC1-PDE4-dependent manner), competes with dynactin for binding to the dynein intermediate chain, and is essential in neural progenitors for centrosome duplication, mitotic spindle assembly, interkinetic nuclear migration, G2-to-M transition, and heterochromatin DNA replication, with its loss causing severe microcephaly through cell cycle arrest at multiple stages."},"narrative":{"mechanistic_narrative":"NDE1 is a coiled-coil scaffold protein that controls cytoplasmic dynein activity and localization across the cell cycle, and is essential for neural progenitor proliferation and cortical development [PMID:15473967, PMID:27553190]. It binds the dynein intermediate and light chains rather than the motor domain [PMID:17682047] and stably recruits LIS1 to the dynein holoenzyme, where LIS1 engages the motor during the prepowerstroke state to drive a persistent, high-load force-generating dynein state [PMID:20403325]. NDE1 and dynactin compete for an overlapping region of the dynein intermediate chain, providing mutually exclusive regulation of individual dynein molecules [PMID:21911489, PMID:22669947]; this competition manifests in non-overlapping functional pools, exemplified at the immunological synapse where NDE1/dynein drives MTOC translocation while dynein/dynactin drives lytic granule clustering [PMID:27534551]. NDE1 acts upstream of LIS1 to recruit and activate dynein on Golgi and endocytic membranes [PMID:20048338], and it recruits dynein to kinetochores: CENP-F brings NDE1 (and NDEL1 and LIS1) to kinetochores [PMID:17600710], NDE1 binds CENP-F as a cargo, and NDE1 is a major contributor to kinetochore dynein recruitment required for chromosome alignment and silencing of the spindle checkpoint [PMID:17600710, PMID:29930206]. NDE1 function is gated by phosphorylation: CDK1 phosphorylation controls cargo binding and association with the late G2–M nuclear envelope and kinetochores and is required for the G2-to-M transition [PMID:21529751, PMID:29930206]. NDE1 abundance is itself cell-cycle-regulated, with CDK5 priming NDE1 for FBW7-mediated ubiquitylation and destruction at G1 entry, a pathway that sets ciliary length since NDE1 negatively regulates cilia from the mother centriole [PMID:21394081, PMID:26206584]. Beyond mitosis, NDE1 has a nuclear pool that interacts with cohesin and is required for heterochromatin DNA replication in mid-late S phase [PMID:25245017], and in neural progenitors its loss causes cell cycle arrest at interkinetic nuclear migration, the G2-to-M transition, and the G1-to-S cilia checkpoint, with the G2-to-M role being uniquely NDE1-dependent and non-redundant with NDEL1 [PMID:27553190]. Truncating NDE1 mutations destabilize the protein and abolish dynein binding and centrosomal localization, causing severe microcephaly [PMID:21529751].","teleology":[{"year":2004,"claim":"Established that NDE1 is required in vivo for centrosome and mitotic functions of neural progenitors, framing it as a developmental cell-division regulator rather than an in vitro curiosity.","evidence":"Nde1 knockout mouse with BrdU birthdating, centrosome duplication assays, and immunostaining","pmids":["15473967"],"confidence":"High","gaps":["Did not define the molecular mechanism linking NDE1 to centrosome duplication","Did not separate mitotic from interphase contributions"]},{"year":2006,"claim":"Began defining NDE1 as a cell-cycle-phosphorylated centrosomal scaffold by identifying Cdc2/CDK1 phosphorylation sites and centrosomal partners Su48 and p78/MCRS1 whose binding depends on NDE1 phosphorylation.","evidence":"Yeast two-hybrid, Co-IP, in vitro kinase assays, site-directed mutagenesis, and siRNA in cultured cells","pmids":["16682949","16547491"],"confidence":"Medium","gaps":["Functional significance of Su48 and p78 complexes for dynein regulation unclear","p78 interaction rests on a single low-confidence study"]},{"year":2007,"claim":"Resolved how dynein reaches kinetochores, showing NDE1 binds dynein via the intermediate/light chains and, with CENP-F, recruits dynein and dynactin to kinetochores for chromosome alignment and checkpoint control.","evidence":"Reciprocal Co-IP mapping the dynein subunit interaction, antibody injection epistasis, siRNA, and live imaging","pmids":["17600710","17682047"],"confidence":"High","gaps":["Did not establish whether NDE1 and NDEL1 act on the same or distinct kinetochore dynein pools","Cargo identity of NDE1 at kinetochores not yet defined"]},{"year":2008,"claim":"Embedded NDE1 in a neurodevelopmental signaling module by placing it, with LIS1/NDEL1/dynein, in a centrosomal complex with DISC1 and PDE4 and showing competitive NDE1/NDEL1 binding to DISC1.","evidence":"Co-IP, in vitro binding assays, and immunofluorescence in cultured neurons","pmids":["18983980","18469341"],"confidence":"Low","gaps":["Single Co-IP studies without reciprocal or biophysical validation","PKA phosphorylation asserted but not confirmed by in vitro kinase assay in these reports"]},{"year":2008,"claim":"Demonstrated genetic collaboration between Lis1 and Nde1 in controlling radial glial fate, division asymmetry, and apical attachment, linking the pathway to corticogenesis dosage effects.","evidence":"Allelic-series Lis1-Nde1 double mutant mice with birthdating and cleavage-plane analysis","pmids":["18469343"],"confidence":"Medium","gaps":["Molecular basis of apical attachment defect not resolved here","Single-lab genetic epistasis"]},{"year":2010,"claim":"Provided the core biophysical mechanism: NDE1 recruits LIS1 to dynein to induce a persistent-force state under load, while NDE1 alone abrogates force, and placed NDE1/NDEL1 upstream of LIS1 in membrane dynein recruitment.","evidence":"Single-molecule optical trapping with reconstituted purified proteins; and siRNA epistasis with rescue on Golgi/endocytic membranes","pmids":["20403325","20048338"],"confidence":"High","gaps":["How NDE1-alone force abrogation is reconciled with its activating role in cells not fully defined","Membrane association mechanism of NDE1 not mapped"]},{"year":2011,"claim":"Connected NDE1 to ciliary length control and human disease, showing it negatively regulates cilia from the mother centriole and that truncating mutations destabilize NDE1, abolish dynein binding/centrosomal localization, and require CDK1 T246 phosphorylation for G2-to-M progression.","evidence":"siRNA, zebrafish morpholino, live imaging; and patient cell lines, mutant constructs, Co-IP, and in vitro kinase assay","pmids":["21394081","21529751"],"confidence":"High","gaps":["Mechanism by which NDE1 restrains ciliary length not defined","Link between ciliary phenotype and microcephaly incomplete"]},{"year":2011,"claim":"Defined the NDE1-versus-dynactin competition at the dynein intermediate chain as a switch for individual dynein molecules, and identified a separate LC8 binding site on NDE1.","evidence":"Competition binding and pull-down assays with purified proteins","pmids":["21911489"],"confidence":"Medium","gaps":["Functional consequence of LC8 binding to NDE1 undefined","Single-lab in vitro study"]},{"year":2011,"claim":"Extended the scaffolding role beyond dynein, showing NDE1 directly binds utrophin/dystrophin to link cytoskeleton to ECM and stabilize radial glial morphology and adhesion.","evidence":"Co-IP, immunofluorescence, and genetic epistasis in double-mutant mice","pmids":["22028625"],"confidence":"Medium","gaps":["Whether DGC linkage is dynein-dependent unresolved","Single-lab finding"]},{"year":2011,"claim":"Identified PKA phosphorylation of NDE1 at T131 (DISC1/PDE4-dependent) as a modulator of NDE1-LIS1/NDEL1 interactions and neurite outgrowth.","evidence":"In vitro kinase assays, phospho-specific antibody, Co-IP, and neurite outgrowth assays","pmids":["21677187"],"confidence":"Medium","gaps":["In vivo relevance of T131 phosphorylation not established","Single-lab study"]},{"year":2012,"claim":"Provided structural and atomic-level interaction detail: NDE1 forms higher-order oligomers with a folded-back C-terminus required for dynein/DISC1 binding, and maps the NDE1 site on dynein IC overlapping but distinct from dynactin's, with IC preferring dynactin when all three are present.","evidence":"Negative-stain EM, crosslinking-MS; and ITC and NMR with purified proteins","pmids":["22843697","22669947"],"confidence":"High","gaps":["Structure-function of oligomerization not validated in cells","How phosphorylation shifts the competitive balance not structurally resolved"]},{"year":2014,"claim":"Revealed a non-mitotic nuclear role: NDE1 interacts with cohesin and is required for heterochromatin DNA replication, with its loss causing replication stress, DSBs, and p53-dependent apoptosis in neural progenitors.","evidence":"Co-IP, BrdU labeling, γH2AX, in Nde1 mutant mouse neural progenitors","pmids":["25245017"],"confidence":"Medium","gaps":["Direct vs indirect role at heterochromatin replication forks unclear","Mechanism connecting cohesin binding to replication timing undefined"]},{"year":2016,"claim":"Dissected stage-specific neural progenitor requirements, showing NDE1 loss arrests cells at interkinetic nuclear migration, G2-to-M, and G1-to-S cilia checkpoints, with the G2-to-M role uniquely non-redundant with NDEL1.","evidence":"In utero electroporation of shRNA, EdU/BrdU labeling, and NDEL1-overexpression rescue in rat cortex","pmids":["27553190"],"confidence":"High","gaps":["Molecular basis of the NDE1-specific G2-to-M function not defined","How the three arrests interrelate mechanistically unclear"]},{"year":2016,"claim":"Showed functional partitioning of dynein regulators in T cells, with NDE1/dynein driving MTOC translocation and dynein/dynactin driving granule clustering at the immunological synapse.","evidence":"Dominant-negative and siRNA with cytotoxicity assays in Jurkat and primary CTLs","pmids":["27534551"],"confidence":"Medium","gaps":["Whether the synapse partitioning uses the same IC competition mechanism not directly tested","Single-lab study"]},{"year":2017,"claim":"Provided structural and developmental validation of the DISC1–NDEL1 axis, solving the DISC1 C-tail/Ndel1 complex and showing its disruption impairs kinetochore attachment and radial glial cell-cycle progression in mouse and human organoids.","evidence":"X-ray crystallography, Co-IP, in utero electroporation, and iPSC-derived forebrain organoids","pmids":["29103808"],"confidence":"High","gaps":["Focused on NDEL1 rather than NDE1 directly","How DISC1 regulates kinetochore vs centrosome targeting differs between paralogs"]},{"year":2018,"claim":"Identified CENP-F as the first well-characterized NDE1 cargo and established CDK1 phosphorylation as the switch controlling NDE1 cargo binding and its localization to the G2–M nuclear envelope and kinetochores, with NDE1 a major contributor to kinetochore dynein.","evidence":"RNAi with phosphomimetic/phosphomutant rescue, phospho-specific antibody, and in vitro CENP-F binding assays","pmids":["29930206"],"confidence":"High","gaps":["Other NDE1 cargoes beyond CENP-F not identified","Quantitative contribution relative to other kinetochore dynein adaptors incomplete"]},{"year":null,"claim":"How NDE1 phosphorylation states integrate to switch the protein between force-abrogating, force-promoting, and cargo-binding modes on a single dynein molecule, and the full set of its non-dynein cargoes, remain unresolved.","evidence":"","pmids":[],"confidence":"Medium","gaps":["No unified model linking CDK1/CDK5/PKA phosphorylation to the dynactin-competition switch","Cargo repertoire beyond CENP-F undefined","Mechanism coupling cytoplasmic dynein roles to the nuclear cohesin/replication role unknown"]}],"mechanism_profile":{"molecular_activity":[{"term_id":"GO:0060090","term_label":"molecular adaptor activity","supporting_discovery_ids":[0,4,5,7,21]},{"term_id":"GO:0008092","term_label":"cytoskeletal protein binding","supporting_discovery_ids":[0,5,6,19]},{"term_id":"GO:0098772","term_label":"molecular function regulator activity","supporting_discovery_ids":[0,6,19]}],"localization":[{"term_id":"GO:0005815","term_label":"microtubule organizing center","supporting_discovery_ids":[1,2,3,10,11]},{"term_id":"GO:0005694","term_label":"chromosome","supporting_discovery_ids":[4,5,21]},{"term_id":"GO:0005929","term_label":"cilium","supporting_discovery_ids":[2,9]},{"term_id":"GO:0005635","term_label":"nuclear envelope","supporting_discovery_ids":[21]},{"term_id":"GO:0005634","term_label":"nucleus","supporting_discovery_ids":[15]},{"term_id":"GO:0005794","term_label":"Golgi apparatus","supporting_discovery_ids":[7]}],"pathway":[{"term_id":"R-HSA-1640170","term_label":"Cell Cycle","supporting_discovery_ids":[1,3,14,21]},{"term_id":"R-HSA-9609507","term_label":"Protein localization","supporting_discovery_ids":[0,7]},{"term_id":"R-HSA-1266738","term_label":"Developmental Biology","supporting_discovery_ids":[1,14,24]},{"term_id":"R-HSA-69306","term_label":"DNA Replication","supporting_discovery_ids":[15]},{"term_id":"R-HSA-1852241","term_label":"Organelle biogenesis and maintenance","supporting_discovery_ids":[2,9]}],"complexes":["cytoplasmic dynein complex","kinetochore"],"partners":["LIS1","CENP-F","NDEL1","DISC1","MCRS1","DCTN1","DMD","YWHAE"],"other_free_text":[]}},"prefetch_data":{"uniprot":{"accession":"Q9NXR1","full_name":"Nuclear distribution protein nudE homolog 1","aliases":[],"length_aa":335,"mass_kda":37.7,"function":"Required for centrosome duplication and formation and function of the mitotic spindle. Essential for the development of the cerebral cortex. May regulate the production of neurons by controlling the orientation of the mitotic spindle during division of cortical neuronal progenitors of the proliferative ventricular zone of the brain. Orientation of the division plane perpendicular to the layers of the cortex gives rise to two proliferative neuronal progenitors whereas parallel orientation of the division plane yields one proliferative neuronal progenitor and a postmitotic neuron. A premature shift towards a neuronal fate within the progenitor population may result in an overall reduction in the final number of neurons and an increase in the number of neurons in the deeper layers of the cortex. 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tumorigenicity of tumor cells in athymic (nude) mice.","date":"1979","source":"The Journal of general virology","url":"https://pubmed.ncbi.nlm.nih.gov/219138","citation_count":31,"is_preprint":false},{"pmid":"2736153","id":"PMC_2736153","title":"A comparison of bone turnover in athymic (nude) and euthymic mice: biochemical, histomorphometric, bone ash and in vitro studies.","date":"1989","source":"Bone","url":"https://pubmed.ncbi.nlm.nih.gov/2736153","citation_count":31,"is_preprint":false},{"pmid":"18203299","id":"PMC_18203299","title":"Anticancer activity of genistein on implanted tumor of human SG7901 cells in nude mice.","date":"2008","source":"World journal of gastroenterology","url":"https://pubmed.ncbi.nlm.nih.gov/18203299","citation_count":31,"is_preprint":false},{"pmid":"23673330","id":"PMC_23673330","title":"Spatially dependent dynamic MAPK modulation by the Nde1-Lis1-Brap complex patterns mammalian CNS.","date":"2013","source":"Developmental 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athymic nu/nu (nude) mice.","date":"2004","source":"International immunology","url":"https://pubmed.ncbi.nlm.nih.gov/14688063","citation_count":28,"is_preprint":false},{"pmid":"12016512","id":"PMC_12016512","title":"Complete rescue of the nude mutant phenotype by a wild-type Foxn1 transgene.","date":"2002","source":"Mammalian genome : official journal of the International Mammalian Genome Society","url":"https://pubmed.ncbi.nlm.nih.gov/12016512","citation_count":27,"is_preprint":false},{"pmid":"29191162","id":"PMC_29191162","title":"Severe congenital microcephaly with 16p13.11 microdeletion combined with NDE1 mutation, a case report and literature review.","date":"2017","source":"BMC medical genetics","url":"https://pubmed.ncbi.nlm.nih.gov/29191162","citation_count":25,"is_preprint":false},{"pmid":"25332407","id":"PMC_25332407","title":"Identification of Rare, Single-Nucleotide Mutations in NDE1 and Their Contributions to Schizophrenia Susceptibility.","date":"2014","source":"Schizophrenia bulletin","url":"https://pubmed.ncbi.nlm.nih.gov/25332407","citation_count":25,"is_preprint":false},{"pmid":"3924709","id":"PMC_3924709","title":"Chromosome findings in human neuroblastomas xenografted in nude mice.","date":"1985","source":"Japanese journal of cancer research : Gann","url":"https://pubmed.ncbi.nlm.nih.gov/3924709","citation_count":23,"is_preprint":false},{"pmid":"20837475","id":"PMC_20837475","title":"The hyposensitive N187D P2X7 mutant promotes malignant progression in nude mice.","date":"2010","source":"The Journal of biological chemistry","url":"https://pubmed.ncbi.nlm.nih.gov/20837475","citation_count":21,"is_preprint":false},{"pmid":"6522098","id":"PMC_6522098","title":"Immunity to Brugia pahangi in athymic nude and normal mice: eosinophilia, antibody and hypersensitivity responses.","date":"1984","source":"Parasite 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Medicine","url":"https://pubmed.ncbi.nlm.nih.gov/17159381","citation_count":18,"is_preprint":false}],"cost":{"stage1":{"model":"claude-sonnet-4-6","input_tokens":45480,"output_tokens":6181,"usd":0.114577,"stage1_stop_reason":"end_turn"},"stage2":{"model":"claude-opus-4-8","input_tokens":14908,"output_tokens":5578,"usd":0.106995,"stage2_stop_reason":"end_turn"},"total_usd":0.221572,"stage1_batch_id":"msgbatch_013a8chtv3AWyTqv4z4sEF4C","stage2_batch_id":"msgbatch_01AHsuW63vinsvuTgzmQ3n62","note":"batch pricing = 50% of standard"},"stage1_raw":"```json\n{\n  \"discoveries\": [\n    {\n      \"year\": 2010,\n      \"finding\": \"NDE1 stably recruits LIS1 to the dynein holoenzyme molecule, where LIS1 interacts with the motor domain during the prepowerstroke state of the dynein crossbridge cycle. NDE1 alone abrogates dynein force production, whereas LIS1 alone or with NDE1 induces a persistent-force dynein state that improves ensemble function of multiple dyneins under high-load conditions.\",\n      \"method\": \"Single-molecule force measurements, optical trapping, biochemical reconstitution with purified proteins\",\n      \"journal\": \"Cell\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — in vitro reconstitution with purified proteins and single-molecule force measurements; rigorous mechanistic dissection in a single high-impact study\",\n      \"pmids\": [\"20403325\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2004,\n      \"finding\": \"Ablation of Nde1 in mouse results in microcephaly with defects in centrosome duplication, mitotic spindle assembly, mitotic progression, and mitotic orientation in cortical progenitors, demonstrating Nde1 is essential for these processes in vivo.\",\n      \"method\": \"Knockout mouse model, BrdU birthdating, in vitro centrosome duplication assays, immunostaining\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — clean KO mouse with multiple orthogonal phenotypic readouts plus in vitro functional assays; independently replicated by subsequent studies\",\n      \"pmids\": [\"15473967\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"NDE1 is a negative regulator of ciliary length; it is expressed at high levels in mitosis and low levels in quiescence, localizes at the mother centriole, and cells depleted of NDE1 have longer cilia and a delay in cell cycle re-entry that correlates with ciliary length.\",\n      \"method\": \"siRNA knockdown, live imaging, immunofluorescence localization, zebrafish morpholino knockdown\",\n      \"journal\": \"Nature cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — RNAi in mammalian cells plus in vivo zebrafish validation; multiple orthogonal methods across two systems\",\n      \"pmids\": [\"21394081\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"Human NDE1 mutations truncating C-terminal domains render the protein unstable, unable to bind cytoplasmic dynein, and unable to localize to the centrosome. CDK1 phosphorylation at T246 within the C-terminal region is required for cell-cycle progression from G2 to M phase.\",\n      \"method\": \"Patient cell lines, transfection of tagged mutant constructs, co-immunoprecipitation, immunofluorescence, cell cycle assays, in vitro kinase assay\",\n      \"journal\": \"American journal of human genetics\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — patient-derived mutations studied with multiple functional assays (binding, localization, cell cycle) in a single rigorous study\",\n      \"pmids\": [\"21529751\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"CENP-F interacts with both NDE1 and NDEL1, and recruits NDE1, NDEL1, and LIS1 to kinetochores. NDE1, but not NDEL1, is specifically required for kinetochore localization of dynein. Suppression of NDE1 inhibits metaphase chromosome alignment and activates the spindle checkpoint.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, immunofluorescence, live cell imaging\",\n      \"journal\": \"Current biology : CB\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — reciprocal Co-IP plus RNAi with defined functional readouts; two orthogonal methods in single lab\",\n      \"pmids\": [\"17600710\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2007,\n      \"finding\": \"NDE1 and NDEL1 each localize to mitotic kinetochores before dynein and other kinetochore components; inhibition of both causes metaphase arrest with misoriented chromosomes. Dynein interacts with NDE1 through the dynein intermediate and light chains (not the motor domain). NDE1/NDEL1 are required for dynein and dynactin recruitment to kinetochores.\",\n      \"method\": \"Antibody injection, immunofluorescence, co-immunoprecipitation, live cell imaging\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — antibody injection epistasis, reciprocal Co-IP mapping the dynein subunit interaction, plus defined mitotic phenotype readouts\",\n      \"pmids\": [\"17682047\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"NDE1 competes with dynactin for binding to a common region within the dynein intermediate chain (IC), providing a mechanism for mutually exclusive regulation of individual dynein molecules. LC8 binds to a novel sequence within NDE1 without detectably affecting the dynein-NDE1 interaction.\",\n      \"method\": \"Co-immunoprecipitation, pull-down assays, competition binding assays with purified proteins\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1–2 / Weak — in vitro binding competition with purified proteins; single lab, single study\",\n      \"pmids\": [\"21911489\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2010,\n      \"finding\": \"NDE1 and NDEL1 depletion together causes striking dispersal of Golgi complex and endocytic compartments and complete loss of dynein from membranes, placing NDE1 and NDEL1 upstream of LIS1 in dynein recruitment/activation on membranes. A substantial portion of NDE1 and NDEL1 is membrane-associated. Expression of exogenous NDE1 can rescue LIS1 depletion effects on Golgi, but LIS1 only partially rescues NDE1/NDEL1 depletion.\",\n      \"method\": \"siRNA knockdown, immunofluorescence, subcellular fractionation, rescue experiments\",\n      \"journal\": \"Journal of cell science\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — systematic RNAi with genetic epistasis (rescue experiments) establishing pathway order; single lab\",\n      \"pmids\": [\"20048338\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"PKA phosphorylates NDE1 at threonine-131 (T131) in a manner dependent on DISC1 and PDE4. Phosphorylation at T131 modulates NDE1-LIS1 and NDE1-NDEL1 interactions. T131-phosphorylated NDE1 localizes to the postsynaptic density, proximal axons, nucleus, and centrosome (enriched during mitosis). Mutation mimicking T131 phosphorylation inhibits neurite outgrowth.\",\n      \"method\": \"In vitro kinase assays, homology modeling, co-immunoprecipitation, immunofluorescence, neurite outgrowth assay, phospho-specific antibody\",\n      \"journal\": \"The Journal of neuroscience\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro kinase assay plus functional assays for binding and neurite outgrowth; single lab, multiple methods\",\n      \"pmids\": [\"21677187\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2015,\n      \"finding\": \"FBW7 is the E3 ubiquitin ligase that mediates destruction of NDE1 upon entry into G1, with CDK5 priming NDE1 for FBW7-mediated recognition. NDE1 levels inversely correlate with ciliogenesis, and this CDK5-FBW7-NDE1 pathway controls ciliary length in a cell cycle-dependent manner.\",\n      \"method\": \"Co-immunoprecipitation, siRNA knockdown, ubiquitylation assays, rescue epistasis experiments, immunofluorescence\",\n      \"journal\": \"The EMBO journal\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — ubiquitylation assays identifying the E3 ligase and priming kinase, plus genetic epistasis (double knockdown rescue); multiple orthogonal methods\",\n      \"pmids\": [\"26206584\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"NDE1 forms a complex with centrosomal protein Su48; NDE1 is phosphorylated by Cdc2 in vivo at six putative phosphorylation sites, and mutation of these sites diminishes Cdc2 phosphorylation, affects stability of Su48-NDE1 interactions, and alters centrosomal localization of NDE1. Ablation of NDE1 by siRNA causes mitotic delay and cell death.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, in vitro kinase assay, site-directed mutagenesis, siRNA knockdown, immunofluorescence\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — in vitro kinase assay with mutagenesis plus Co-IP and functional knockdown; single lab, multiple methods\",\n      \"pmids\": [\"16682949\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2006,\n      \"finding\": \"NDE1 interacts with p78/MCRS1, and this interaction is regulated by phosphorylation on NDE1. A fraction of p78 localizes to the centrosome, and the forkhead-associated domain of p78 mediates its association with NDE1 and its centrosomal localization.\",\n      \"method\": \"Yeast two-hybrid, co-immunoprecipitation, immunofluorescence, siRNA knockdown\",\n      \"journal\": \"Oncogene\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, yeast two-hybrid plus Co-IP, limited mechanistic follow-up\",\n      \"pmids\": [\"16547491\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"NDE1 and NDEL1 show opposing binding patterns to DISC1 Ser704 versus Cys704 at the same DISC1 binding domain, suggesting competitive binding to DISC1.\",\n      \"method\": \"In vitro binding assays, co-immunoprecipitation\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single Co-IP/binding assay method\",\n      \"pmids\": [\"18469341\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"NDE1, NDEL1, and LIS1, together with dynein, associate with DISC1, PDE4B, and PDE4D within cells, and this complex is present at the centrosome. NDE1 is phosphorylated by PKA.\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence in cultured neurons\",\n      \"journal\": \"Biochemical and biophysical research communications\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single Co-IP study, single lab; PKA phosphorylation not confirmed by in vitro kinase assay in this paper\",\n      \"pmids\": [\"18983980\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"NDE1 shRNA in rat embryonic brains causes cell cycle arrest at three distinct stages: apical interkinetic nuclear migration, the G2-to-M transition, and regulation of primary cilia at G1-to-S. NDEL1 RNAi has no such effects, but NDEL1 overexpression can compensate for NDE1 loss except at the G2-to-M transition, revealing a unique NDE1 role at this transition.\",\n      \"method\": \"In utero electroporation of shRNA, immunofluorescence, BrdU/EdU pulse labeling, rescue by NDEL1 overexpression\",\n      \"journal\": \"Nature communications\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 2 / Strong — in vivo RNAi with multiple cell cycle stage readouts plus specific rescue experiments distinguishing NDE1 from NDEL1; replicated across multiple stages\",\n      \"pmids\": [\"27553190\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"NDE1 has a nuclear pool and interacts with cohesin and its associated chromatin remodeler; loss of NDE1 causes stalled DNA replication specifically in mid-late S phase at heterochromatin domains, leading to DNA double-strand breaks and p53-dependent apoptosis in neural progenitors.\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence, BrdU pulse labeling, DNA damage markers (γH2AX), Nde1 mutant mouse neural progenitors\",\n      \"journal\": \"eLife\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP plus multiple functional readouts in primary neural progenitors; single lab\",\n      \"pmids\": [\"25245017\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2011,\n      \"finding\": \"NDE1 interacts directly with utrophin/dystrophin, allowing assembly of a multi-protein complex that links the cytoskeleton to the extracellular matrix of radial glia, stabilizing their lateral membrane, cell-cell adhesion, and radial morphology. Lis1-Nde1 mutations destabilize the dystrophin/dystroglycan glycoprotein complex (DGC).\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence, genetic epistasis (double mutant mice), rescue experiments\",\n      \"journal\": \"PLoS biology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP identifying direct interaction plus genetic epistasis in vivo; single lab\",\n      \"pmids\": [\"22028625\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2013,\n      \"finding\": \"The Nde1-Lis1 complex regulates MAPK signaling threshold through a direct interaction between Lis1 and Brap, a MAPK signaling threshold modulator. Nde1-Lis1 deficiency results in spatially dependent hyperactivation of MAPK and altered Ksr scaffold levels; epistasis analyses support synergistic Brap and Lis1 functions.\",\n      \"method\": \"Co-immunoprecipitation, immunofluorescence, genetic epistasis (double mutant mouse CNS), MAPK pathway assays\",\n      \"journal\": \"Developmental cell\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — Co-IP plus in vivo genetic epistasis; single lab\",\n      \"pmids\": [\"23673330\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"NDE1 forms needle-like dimers, tetramers, and chain-like polymers in solution. The C-terminal domain adopts a folded-back structure that facilitates interaction with the N-terminal coiled-coil and is required for binding dynein and DISC1. NDE1 and NDEL1 can interact directly in mixed complexes.\",\n      \"method\": \"Negative stain electron microscopy, chemical cross-linking/mass spectrometry, isotope labeling\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 1 / Weak — structural/biophysical characterization; single lab, no functional validation of structure-function in same study\",\n      \"pmids\": [\"22843697\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2012,\n      \"finding\": \"NDE1 binds the dynein intermediate chain (IC) at its N-terminal coiled-coil domain; the NDE1-binding site on IC overlaps with but is distinct from the p150(Glued) (dynactin) binding site. NDE1 and p150(Glued) show distinct binding modes: NDE1 contacts only region 1 of the bi-segmental IC binding site, whereas p150(Glued) requires both regions. When all three proteins are present, IC preferentially binds p150(Glued).\",\n      \"method\": \"Isothermal titration calorimetry, NMR spectroscopy, in vitro binding assays with purified proteins\",\n      \"journal\": \"The Journal of biological chemistry\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Moderate — ITC and NMR with purified proteins providing atomic-level mapping; rigorous biophysical methods in single study\",\n      \"pmids\": [\"22669947\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2017,\n      \"finding\": \"The crystal structure of the DISC1 C-terminal tail in complex with the Ndel1 binding domain was solved. DISC1 regulates Ndel1 kinetochore attachment (but not centrosome localization) during mitosis. Disrupting DISC1/Ndel1 complex formation prolongs mitotic length and causes cell-cycle deficits of radial glial cells in embryonic mouse cortex and human forebrain organoids.\",\n      \"method\": \"X-ray crystallography, co-immunoprecipitation, immunofluorescence, in utero electroporation, human iPSC-derived organoids\",\n      \"journal\": \"Neuron\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1 / Strong — high-resolution crystal structure combined with multiple functional validations in cells, mouse, and human organoids; multiple orthogonal methods\",\n      \"pmids\": [\"29103808\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2018,\n      \"finding\": \"CDK1 phosphorylates Nde1 to control its cargo-binding throughout the cell cycle. Phospho-Nde1 specifically associates with the late G2-M nuclear envelope and prophase-to-anaphase kinetochores. Phosphomutant Nde1 shows weaker CENP-F binding in vitro, and CENP-F is identified as the first well-characterized Nde1 cargo protein. Expression of dynein-binding-deficient Nde1 reduces kinetochore dynein by half, establishing Nde1 as a major contributor to kinetochore dynein recruitment.\",\n      \"method\": \"Nde1 RNAi, phosphomimetic/phosphomutant cDNA rescue, phospho-specific antibody, in vitro CENP-F binding assay, immunofluorescence\",\n      \"journal\": \"The Journal of cell biology\",\n      \"confidence\": \"High\",\n      \"confidence_rationale\": \"Tier 1–2 / Moderate — in vitro binding assay with mutagenesis plus cell-based rescue experiments using phospho-mutants; multiple orthogonal methods in single lab\",\n      \"pmids\": [\"29930206\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2016,\n      \"finding\": \"NDE1 and dynactin form mutually exclusive complexes with dynein and show non-overlapping distributions in T cells. NDE1/dynein accumulation at the immunological synapse is required for MTOC translocation, while the dynein/dynactin complex is required for lytic granule accumulation at the synapse. Dominant-negative NDE1 or NDE1 knockdown blocks MTOC translocation and CTL-mediated killing.\",\n      \"method\": \"Dominant-negative expression, siRNA knockdown, immunofluorescence, cytotoxicity assays in Jurkat cells and primary CTLs\",\n      \"journal\": \"Journal of immunology\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — dominant-negative and RNAi with defined functional readouts in two cell systems; single lab\",\n      \"pmids\": [\"27534551\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"NDE1 rare variant S214F affects axonal outgrowth and disrupts the interaction between NDE1 and YWHAE (14-3-3 epsilon) in functional assays.\",\n      \"method\": \"Functional binding assays, neurite/axonal outgrowth assay with mutant NDE1\",\n      \"journal\": \"Schizophrenia bulletin\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single lab, single binding assay plus neurite outgrowth; limited mechanistic follow-up\",\n      \"pmids\": [\"25332407\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2008,\n      \"finding\": \"Lis1 and Nde1 collaborate to regulate the fate of radial glial progenitors; double Lis1-Nde1 mutant mice show dose-dependent cortical size reduction and delamination, dramatically increased neuronal differentiation at corticogenesis onset, and striking changes in metaphase progenitor morphology with reduced apical attachment, impairing cell division asymmetry control.\",\n      \"method\": \"Allelic series double mutant mouse analysis, immunostaining, BrdU birthdating, cleavage plane orientation analysis\",\n      \"journal\": \"Human molecular genetics\",\n      \"confidence\": \"Medium\",\n      \"confidence_rationale\": \"Tier 2 / Moderate — genetic epistasis using allelic series of double mutants with multiple readouts; single lab\",\n      \"pmids\": [\"18469343\"],\n      \"is_preprint\": false\n    },\n    {\n      \"year\": 2014,\n      \"finding\": \"Nde1, but not Ndel1, is localized to putative SVZ stem cells and actively dividing progenitors of the SGZ. Increasing Nde1 expression in hippocampal neural stem cells leads to increased neuronal differentiation and decreased astroglial differentiation.\",\n      \"method\": \"Immunofluorescence localization, overexpression in neural stem cell line, differentiation assay\",\n      \"journal\": \"Neuroscience\",\n      \"confidence\": \"Low\",\n      \"confidence_rationale\": \"Tier 3 / Weak — single localization and overexpression study; single lab, limited mechanistic depth\",\n      \"pmids\": [\"24785679\"],\n      \"is_preprint\": false\n    }\n  ],\n  \"current_model\": \"NDE1 is a centrosomal and kinetochore-associated scaffold protein that recruits LIS1 to the dynein holoenzyme (promoting a persistent force-generating dynein state), recruits dynein to kinetochores via interaction with CENP-F and the dynein intermediate/light chains, negatively regulates ciliary length from the mother centriole (with its abundance controlled by CDK5-FBW7-mediated ubiquitylation during G1), undergoes cell cycle-dependent phosphorylation by CDK1 (controlling cargo binding and kinetochore association) and PKA (modulating LIS1 and NDEL1 interactions in a DISC1-PDE4-dependent manner), competes with dynactin for binding to the dynein intermediate chain, and is essential in neural progenitors for centrosome duplication, mitotic spindle assembly, interkinetic nuclear migration, G2-to-M transition, and heterochromatin DNA replication, with its loss causing severe microcephaly through cell cycle arrest at multiple stages.\"\n}\n```","stage2_raw":"{\n  \"mechanistic_narrative\": \"NDE1 is a coiled-coil scaffold protein that controls cytoplasmic dynein activity and localization across the cell cycle, and is essential for neural progenitor proliferation and cortical development [#1, #14]. It binds the dynein intermediate and light chains rather than the motor domain [#5] and stably recruits LIS1 to the dynein holoenzyme, where LIS1 engages the motor during the prepowerstroke state to drive a persistent, high-load force-generating dynein state [#0]. NDE1 and dynactin compete for an overlapping region of the dynein intermediate chain, providing mutually exclusive regulation of individual dynein molecules [#6, #19]; this competition manifests in non-overlapping functional pools, exemplified at the immunological synapse where NDE1/dynein drives MTOC translocation while dynein/dynactin drives lytic granule clustering [#22]. NDE1 acts upstream of LIS1 to recruit and activate dynein on Golgi and endocytic membranes [#7], and it recruits dynein to kinetochores: CENP-F brings NDE1 (and NDEL1 and LIS1) to kinetochores [#4], NDE1 binds CENP-F as a cargo, and NDE1 is a major contributor to kinetochore dynein recruitment required for chromosome alignment and silencing of the spindle checkpoint [#4, #21]. NDE1 function is gated by phosphorylation: CDK1 phosphorylation controls cargo binding and association with the late G2–M nuclear envelope and kinetochores and is required for the G2-to-M transition [#3, #21]. NDE1 abundance is itself cell-cycle-regulated, with CDK5 priming NDE1 for FBW7-mediated ubiquitylation and destruction at G1 entry, a pathway that sets ciliary length since NDE1 negatively regulates cilia from the mother centriole [#2, #9]. Beyond mitosis, NDE1 has a nuclear pool that interacts with cohesin and is required for heterochromatin DNA replication in mid-late S phase [#15], and in neural progenitors its loss causes cell cycle arrest at interkinetic nuclear migration, the G2-to-M transition, and the G1-to-S cilia checkpoint, with the G2-to-M role being uniquely NDE1-dependent and non-redundant with NDEL1 [#14]. Truncating NDE1 mutations destabilize the protein and abolish dynein binding and centrosomal localization, causing severe microcephaly [#3].\",\n  \"teleology\": [\n    {\n      \"year\": 2004,\n      \"claim\": \"Established that NDE1 is required in vivo for centrosome and mitotic functions of neural progenitors, framing it as a developmental cell-division regulator rather than an in vitro curiosity.\",\n      \"evidence\": \"Nde1 knockout mouse with BrdU birthdating, centrosome duplication assays, and immunostaining\",\n      \"pmids\": [\"15473967\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not define the molecular mechanism linking NDE1 to centrosome duplication\", \"Did not separate mitotic from interphase contributions\"]\n    },\n    {\n      \"year\": 2006,\n      \"claim\": \"Began defining NDE1 as a cell-cycle-phosphorylated centrosomal scaffold by identifying Cdc2/CDK1 phosphorylation sites and centrosomal partners Su48 and p78/MCRS1 whose binding depends on NDE1 phosphorylation.\",\n      \"evidence\": \"Yeast two-hybrid, Co-IP, in vitro kinase assays, site-directed mutagenesis, and siRNA in cultured cells\",\n      \"pmids\": [\"16682949\", \"16547491\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional significance of Su48 and p78 complexes for dynein regulation unclear\", \"p78 interaction rests on a single low-confidence study\"]\n    },\n    {\n      \"year\": 2007,\n      \"claim\": \"Resolved how dynein reaches kinetochores, showing NDE1 binds dynein via the intermediate/light chains and, with CENP-F, recruits dynein and dynactin to kinetochores for chromosome alignment and checkpoint control.\",\n      \"evidence\": \"Reciprocal Co-IP mapping the dynein subunit interaction, antibody injection epistasis, siRNA, and live imaging\",\n      \"pmids\": [\"17600710\", \"17682047\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Did not establish whether NDE1 and NDEL1 act on the same or distinct kinetochore dynein pools\", \"Cargo identity of NDE1 at kinetochores not yet defined\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Embedded NDE1 in a neurodevelopmental signaling module by placing it, with LIS1/NDEL1/dynein, in a centrosomal complex with DISC1 and PDE4 and showing competitive NDE1/NDEL1 binding to DISC1.\",\n      \"evidence\": \"Co-IP, in vitro binding assays, and immunofluorescence in cultured neurons\",\n      \"pmids\": [\"18983980\", \"18469341\"],\n      \"confidence\": \"Low\",\n      \"gaps\": [\"Single Co-IP studies without reciprocal or biophysical validation\", \"PKA phosphorylation asserted but not confirmed by in vitro kinase assay in these reports\"]\n    },\n    {\n      \"year\": 2008,\n      \"claim\": \"Demonstrated genetic collaboration between Lis1 and Nde1 in controlling radial glial fate, division asymmetry, and apical attachment, linking the pathway to corticogenesis dosage effects.\",\n      \"evidence\": \"Allelic-series Lis1-Nde1 double mutant mice with birthdating and cleavage-plane analysis\",\n      \"pmids\": [\"18469343\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Molecular basis of apical attachment defect not resolved here\", \"Single-lab genetic epistasis\"]\n    },\n    {\n      \"year\": 2010,\n      \"claim\": \"Provided the core biophysical mechanism: NDE1 recruits LIS1 to dynein to induce a persistent-force state under load, while NDE1 alone abrogates force, and placed NDE1/NDEL1 upstream of LIS1 in membrane dynein recruitment.\",\n      \"evidence\": \"Single-molecule optical trapping with reconstituted purified proteins; and siRNA epistasis with rescue on Golgi/endocytic membranes\",\n      \"pmids\": [\"20403325\", \"20048338\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"How NDE1-alone force abrogation is reconciled with its activating role in cells not fully defined\", \"Membrane association mechanism of NDE1 not mapped\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Connected NDE1 to ciliary length control and human disease, showing it negatively regulates cilia from the mother centriole and that truncating mutations destabilize NDE1, abolish dynein binding/centrosomal localization, and require CDK1 T246 phosphorylation for G2-to-M progression.\",\n      \"evidence\": \"siRNA, zebrafish morpholino, live imaging; and patient cell lines, mutant constructs, Co-IP, and in vitro kinase assay\",\n      \"pmids\": [\"21394081\", \"21529751\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Mechanism by which NDE1 restrains ciliary length not defined\", \"Link between ciliary phenotype and microcephaly incomplete\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Defined the NDE1-versus-dynactin competition at the dynein intermediate chain as a switch for individual dynein molecules, and identified a separate LC8 binding site on NDE1.\",\n      \"evidence\": \"Competition binding and pull-down assays with purified proteins\",\n      \"pmids\": [\"21911489\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Functional consequence of LC8 binding to NDE1 undefined\", \"Single-lab in vitro study\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Extended the scaffolding role beyond dynein, showing NDE1 directly binds utrophin/dystrophin to link cytoskeleton to ECM and stabilize radial glial morphology and adhesion.\",\n      \"evidence\": \"Co-IP, immunofluorescence, and genetic epistasis in double-mutant mice\",\n      \"pmids\": [\"22028625\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether DGC linkage is dynein-dependent unresolved\", \"Single-lab finding\"]\n    },\n    {\n      \"year\": 2011,\n      \"claim\": \"Identified PKA phosphorylation of NDE1 at T131 (DISC1/PDE4-dependent) as a modulator of NDE1-LIS1/NDEL1 interactions and neurite outgrowth.\",\n      \"evidence\": \"In vitro kinase assays, phospho-specific antibody, Co-IP, and neurite outgrowth assays\",\n      \"pmids\": [\"21677187\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"In vivo relevance of T131 phosphorylation not established\", \"Single-lab study\"]\n    },\n    {\n      \"year\": 2012,\n      \"claim\": \"Provided structural and atomic-level interaction detail: NDE1 forms higher-order oligomers with a folded-back C-terminus required for dynein/DISC1 binding, and maps the NDE1 site on dynein IC overlapping but distinct from dynactin's, with IC preferring dynactin when all three are present.\",\n      \"evidence\": \"Negative-stain EM, crosslinking-MS; and ITC and NMR with purified proteins\",\n      \"pmids\": [\"22843697\", \"22669947\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Structure-function of oligomerization not validated in cells\", \"How phosphorylation shifts the competitive balance not structurally resolved\"]\n    },\n    {\n      \"year\": 2014,\n      \"claim\": \"Revealed a non-mitotic nuclear role: NDE1 interacts with cohesin and is required for heterochromatin DNA replication, with its loss causing replication stress, DSBs, and p53-dependent apoptosis in neural progenitors.\",\n      \"evidence\": \"Co-IP, BrdU labeling, γH2AX, in Nde1 mutant mouse neural progenitors\",\n      \"pmids\": [\"25245017\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Direct vs indirect role at heterochromatin replication forks unclear\", \"Mechanism connecting cohesin binding to replication timing undefined\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Dissected stage-specific neural progenitor requirements, showing NDE1 loss arrests cells at interkinetic nuclear migration, G2-to-M, and G1-to-S cilia checkpoints, with the G2-to-M role uniquely non-redundant with NDEL1.\",\n      \"evidence\": \"In utero electroporation of shRNA, EdU/BrdU labeling, and NDEL1-overexpression rescue in rat cortex\",\n      \"pmids\": [\"27553190\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Molecular basis of the NDE1-specific G2-to-M function not defined\", \"How the three arrests interrelate mechanistically unclear\"]\n    },\n    {\n      \"year\": 2016,\n      \"claim\": \"Showed functional partitioning of dynein regulators in T cells, with NDE1/dynein driving MTOC translocation and dynein/dynactin driving granule clustering at the immunological synapse.\",\n      \"evidence\": \"Dominant-negative and siRNA with cytotoxicity assays in Jurkat and primary CTLs\",\n      \"pmids\": [\"27534551\"],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"Whether the synapse partitioning uses the same IC competition mechanism not directly tested\", \"Single-lab study\"]\n    },\n    {\n      \"year\": 2017,\n      \"claim\": \"Provided structural and developmental validation of the DISC1–NDEL1 axis, solving the DISC1 C-tail/Ndel1 complex and showing its disruption impairs kinetochore attachment and radial glial cell-cycle progression in mouse and human organoids.\",\n      \"evidence\": \"X-ray crystallography, Co-IP, in utero electroporation, and iPSC-derived forebrain organoids\",\n      \"pmids\": [\"29103808\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Focused on NDEL1 rather than NDE1 directly\", \"How DISC1 regulates kinetochore vs centrosome targeting differs between paralogs\"]\n    },\n    {\n      \"year\": 2018,\n      \"claim\": \"Identified CENP-F as the first well-characterized NDE1 cargo and established CDK1 phosphorylation as the switch controlling NDE1 cargo binding and its localization to the G2–M nuclear envelope and kinetochores, with NDE1 a major contributor to kinetochore dynein.\",\n      \"evidence\": \"RNAi with phosphomimetic/phosphomutant rescue, phospho-specific antibody, and in vitro CENP-F binding assays\",\n      \"pmids\": [\"29930206\"],\n      \"confidence\": \"High\",\n      \"gaps\": [\"Other NDE1 cargoes beyond CENP-F not identified\", \"Quantitative contribution relative to other kinetochore dynein adaptors incomplete\"]\n    },\n    {\n      \"year\": null,\n      \"claim\": \"How NDE1 phosphorylation states integrate to switch the protein between force-abrogating, force-promoting, and cargo-binding modes on a single dynein molecule, and the full set of its non-dynein cargoes, remain unresolved.\",\n      \"evidence\": \"\",\n      \"pmids\": [],\n      \"confidence\": \"Medium\",\n      \"gaps\": [\"No unified model linking CDK1/CDK5/PKA phosphorylation to the dynactin-competition switch\", \"Cargo repertoire beyond CENP-F undefined\", \"Mechanism coupling cytoplasmic dynein roles to the nuclear cohesin/replication role unknown\"]\n    }\n  ],\n  \"mechanism_profile\": {\n    \"molecular_activity\": [\n      {\"term_id\": \"GO:0060090\", \"supporting_discovery_ids\": [0, 4, 5, 7, 21]},\n      {\"term_id\": \"GO:0008092\", \"supporting_discovery_ids\": [0, 5, 6, 19]},\n      {\"term_id\": \"GO:0098772\", \"supporting_discovery_ids\": [0, 6, 19]}\n    ],\n    \"localization\": [\n      {\"term_id\": \"GO:0005815\", \"supporting_discovery_ids\": [1, 2, 3, 10, 11]},\n      {\"term_id\": \"GO:0005694\", \"supporting_discovery_ids\": [4, 5, 21]},\n      {\"term_id\": \"GO:0005929\", \"supporting_discovery_ids\": [2, 9]},\n      {\"term_id\": \"GO:0005635\", \"supporting_discovery_ids\": [21]},\n      {\"term_id\": \"GO:0005634\", \"supporting_discovery_ids\": [15]},\n      {\"term_id\": \"GO:0005794\", \"supporting_discovery_ids\": [7]}\n    ],\n    \"pathway\": [\n      {\"term_id\": \"R-HSA-1640170\", \"supporting_discovery_ids\": [1, 3, 14, 21]},\n      {\"term_id\": \"R-HSA-9609507\", \"supporting_discovery_ids\": [0, 7]},\n      {\"term_id\": \"R-HSA-1266738\", \"supporting_discovery_ids\": [1, 14, 24]},\n      {\"term_id\": \"R-HSA-69306\", \"supporting_discovery_ids\": [15]},\n      {\"term_id\": \"R-HSA-1852241\", \"supporting_discovery_ids\": [2, 9]}\n    ],\n    \"complexes\": [\"cytoplasmic dynein complex\", \"kinetochore\"],\n    \"partners\": [\"LIS1\", \"CENP-F\", \"NDEL1\", \"DISC1\", \"MCRS1\", \"DCTN1\", \"DMD\", \"YWHAE\"],\n    \"other_free_text\": []\n  }\n}","audit_flag":null,"evaluation":{"pairwise":"win","faith_supported":8,"faith_total":8,"faith_pct":100.0}}