The research report should be a detailed narrative explaining the function, biological processes, and localization of the gene product. Citations should be given for all claims.
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this with annotations you find in gene/protein databases, but these can be outdated or inaccurate.
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Include evidence where possible. We are interested in both experimental evidence as well as inference from structure, evolution, or bioinformatic analysis. Precise studies should be prioritized over high-throughput, where available.
Human NDE1 encodes nuclear distribution protein NudE homolog 1, a conserved, nonenzymatic regulator of cytoplasmic dynein. Its primary molecular function is best described as a transient LIS1-recruitment and dynein-assembly factor: NDE1 binds the dynein intermediate chain and LIS1, raises the local availability of LIS1 at autoinhibited dynein, and promotes assembly of active dynein–dynactin–cargo-adaptor complexes. It then dissociates before processive movement. NDE1 is therefore not a motor, enzyme, or conventional cargo-specific activating adaptor; it is an assembly/regulatory scaffold whose effects depend strongly on concentration, phosphorylation, isoform, and cellular context. The best direct mechanistic evidence comes from purified-human-protein and single-molecule experiments published in 2023. (zhao2023nde1promoteslis1mediated pages 1-2, zhao2023nde1promoteslis1mediated pages 4-5)
NDE1 acts mainly at microtubule-organizing and dynein-rich structures: centrosomes, the nuclear envelope, spindle poles, mitotic spindle and kinetochores, as well as the basal body of the primary cilium. These locations explain its roles in interkinetic nuclear migration, spindle organization, chromosome segregation, Golgi positioning, ciliary resorption, and cell-cycle progression. Its especially strong requirement in cycling neural progenitors links these cellular functions to human cortical neurogenesis. Biallelic loss-of-function variants cause an exceptionally severe autosomal-recessive microcephaly–microlissencephaly spectrum. (cabet2020variationspathogènesde pages 5-5, garrott2022nde1andndel1 pages 4-6, bakircioglu2011theessentialrole pages 9-11, alkuraya2011humanmutationsin pages 4-6)
The supplied accession and description are internally and externally consistent:
The symbol is potentially confusable with NDEL1 (“NDE1-like 1” or NudEL), but they are separate human paralogs. Human NDE1 and NDEL1 are approximately 56% identical and 69% similar, share several partners, and can compensate for one another in selected assays, but they have different developmental expression and nonredundant functions. NDEL1-specific findings were not treated here as evidence for Q9NXR1. (garrott2022nde1andndel1 pages 2-4, garrott2022nde1andndel1 pages 6-7)
A particularly important recent example is Tsai et al. 2024: the reported pathogenic p.Arg105Pro variant is in NDEL1, not NDE1. That study is useful for showing complementary expression—NDE1 preferentially associated with cycling neural progenitors and NDEL1 with postmitotic neurons—but it does not identify a new NDE1 variant. Published January 2024; DOI: https://doi.org/10.1007/s00401-023-02665-y. (tsai2024novellissencephalyassociatedndel1 pages 17-18)
The N-terminal portion forms an extended α-helical coiled coil. Full-length biophysical studies show that NDE1 can form dimers, tetramers, and higher-order end-to-end polymers; its flexible C-terminal region folds back toward the N-terminal coiled coil. This architecture can bring separated dynein-binding surfaces together and provides a structural explanation for why disease-associated C-terminal truncations destabilize function. Soares et al., published September 2012; DOI: https://doi.org/10.1074/jbc.M112.393439. (tsai2024novellissencephalyassociatedndel1 pages 17-18)
Transcript annotation is complex. A 2020 synthesis reported 15 human isoforms/transcripts, many computationally predicted. Isoforms 1 and 2 share exons 3–10 and encode the canonical 335-aa product, whereas an X2 form uses a different terminal exon. Two experimentally discussed brain isoforms, often designated by their terminal residues as NDE1-SSSC and NDE1-KMLL, differ at the final exon. The human-associated SSSC form and the KMLL form do not necessarily have interchangeable interactions. (monda2018nde1promotesdiverse pages 1-2, sotoperez2020roleofnde1 pages 2-3)
One clear example is the robust, isoform-specific association of NDE1 with the 26S proteasome detected in human cells. Mutations were identified that selectively disrupted this interaction, suggesting a molecular role beyond dynein regulation, although its in-vivo physiological significance remains less established. Monda and Cheeseman, published online July 19, 2018 and in print September 2018; DOI: https://doi.org/10.1091/mbc.e18-07-0418. (monda2018nde1promotesdiverse pages 1-2)
Cytoplasmic dynein-1 is the principal microtubule minus-end-directed motor in animal cells. Productive long-range motility generally requires dynein to assemble with dynactin and a cargo-specific activating adaptor. LIS1 facilitates the transition from autoinhibited dynein to assembly-competent complexes; NDE1 makes this LIS1-dependent activation efficient. (garrott2022nde1andndel1 pages 2-4, zhao2023nde1promoteslis1mediated pages 1-2)
The N-terminal NDE1 fragment comprising residues 1–190 reproduced both activation at low concentration and inhibition at high concentration, showing that this region is sufficient for the central in-vitro mechanism. The C terminus appears to regulate partner access rather than supply the essential catalytic activity—NDE1 has no known catalytic activity. LIS1 R316A/W340A disrupted binding to both NDE1 and dynein and eliminated LIS1-dependent motility enhancement, supporting an overlapping or closely coupled interface on the LIS1 β-propeller. (zhao2023nde1promoteslis1mediated pages 4-5)
In reconstituted single-molecule assays containing mammalian dynein, brain dynactin and the BicDR1 activating adaptor, 1–10 nM NDE1 plus LIS1 increased processive-run frequency by as much as 16-fold, whereas LIS1 alone increased it by no more than approximately 2.6-fold. NDE1 alone at 10 nM had little effect, while 1,000 nM NDE1 nearly abolished motility, illustrating that NDE1 is a stoichiometrically sensitive assembly factor rather than a constitutive motor activator. Zhao, Oten and Yildiz, Nature Communications 14:7221, 2023; DOI: https://doi.org/10.1038/s41467-023-42907-x. (zhao2023nde1promoteslis1mediated pages 1-2)
This 2023 work resolves part of a long-standing controversy. Earlier experiments variously found that NDE1/NDEL1 enhanced dynein–LIS1 association, changed microtubule affinity, or opposed LIS1 effects. The concentration-dependent mechanism explains how NDE1 can promote assembly at low occupancy yet inhibit dynein when it remains bound at high occupancy. Expert reviews still regard phosphorylation state, cellular stoichiometry, cargo context, and division of labor with NDEL1 as unresolved. (garrott2022nde1andndel1 pages 2-4, garrott2022nde1andndel1 pages 10-11, zhao2023nde1promoteslis1mediated pages 1-2)
NDE1 is a dynamic intracellular protein rather than a secreted or integral-membrane protein. Human-cell imaging places endogenous NDE1 in the cytoplasm and at centrosomes throughout much of the cell cycle. In HeLa, SK-N-SH and human neuroepithelial cells, centrosomal signal is prominent in interphase and prophase, decreases during metaphase and anaphase, and NDE1 redistributes onto the metaphase spindle. Cdk1-dependent phosphorylation has been linked to recruitment to the nuclear envelope and kinetochores. (garrott2022nde1andndel1 pages 10-11, bakircioglu2011theessentialrole pages 9-11)
Functionally relevant sites include:
NDE1 promotes dynein-dependent centrosome placement, spindle assembly and focusing, kinetochore function, timely anaphase onset, and pericentrosomal Golgi organization. Importantly, these functions do not all use the same NDE1 interaction. Human-cell CRISPR replacement experiments showed that NDE1–LIS1 binding is required for spindle-pole focusing and Golgi organization but is largely dispensable for centrosome placement. A dynein-binding-defective NDE1 construct failed to rescue anaphase delay, whereas a LIS1-binding-defective construct substantially rescued it. This argues against a single generic “NDE1 recruits LIS1” explanation for every cellular phenotype. (monda2018nde1promotesdiverse pages 1-2, garrott2022nde1andndel1 pages 10-11)
NDE1/NDEL1 double depletion produces stronger Golgi dispersal than depletion of either protein alone, and either paralog can rescue some of this phenotype. By contrast, NDE1 has the larger effect on kinetochore recruitment and neural-progenitor division, demonstrating context-dependent redundancy. (garrott2022nde1andndel1 pages 4-6, garrott2022nde1andndel1 pages 6-7)
NDE1 is a negative regulator of primary-cilium length. At the ciliary base it participates in a cilium-disassembly complex with proteins including CPAP, Aurora A and OFD1, and it can recruit dynein-associated machinery for retrograde transport and resorption. Excess NDE1 shortens cilia, whereas depletion or defective recruitment produces longer cilia, delayed resorption and delayed cell-cycle re-entry. (cabet2020variationspathogènesde pages 5-5, garrott2022nde1andndel1 pages 13-14)
NDE1 abundance is itself cell-cycle controlled. CDK5-dependent phosphorylation creates conditions for SCF–FBW7-mediated ubiquitylation and proteasomal destruction of NDE1 during ciliogenesis, allowing ciliary elongation; subsequent NDE1 activity contributes to resorption when cells re-enter the cycle. Maskey et al., published October 2015; DOI: https://doi.org/10.15252/embj.201490831. Cilium-disassembly-complex evidence was extended in patient-derived neural progenitors and organoids by Gabriel et al., 2016; DOI: https://doi.org/10.15252/embj.201593679. (cabet2020variationspathogènesde pages 5-5, garrott2022nde1andndel1 pages 13-14)
In radial-glial and neuroepithelial progenitors, nuclei migrate between basal and apical positions in phase with the cell cycle. NDE1-dependent dynein regulation is particularly important for the apically directed phase and for coupling nuclear position to mitotic entry. Depletion impairs apical interkinetic nuclear migration, whereas NDEL1 depletion does not reproduce this progenitor phenotype. (garrott2022nde1andndel1 pages 4-6)
In embryonic-brain experiments, NDE1-depleted neural progenitors arrested at three distinguishable points: during apical interkinetic nuclear migration, at the G2-to-M transition, and during cilium-regulated G1-to-S progression. NDEL1 overexpression rescued some but not all NDE1-loss effects, failing particularly at G2-to-M; in postmitotic neuronal migration, however, NDE1 and NDEL1 depletion produced more similar nucleokinesis defects. Doobin et al., published August 2016; DOI: https://doi.org/10.1038/ncomms12551. (garrott2022nde1andndel1 pages 4-6, garrott2022nde1andndel1 pages 6-7, tsai2024novellissencephalyassociatedndel1 pages 17-18)
These results support a unified developmental interpretation: NDE1 deficiency sharply reduces the production and maintenance of cortical progenitors through combined nuclear-migration, ciliary and cell-cycle defects, while also disturbing later neuronal positioning. Human fetal expression is evident in neuroepithelium and cortical plate but was reported to be very low in the subventricular zone at the examined stage. (sotoperez2020roleofnde1 pages 2-3, bakircioglu2011theessentialrole pages 9-11)
Nuclear NDE1 has been reported to interact with cohesin in metaphase–anaphase checkpoint control and with SNF2H during S-phase heterochromatin replication, suggesting dynein-independent contributions to genome maintenance in dividing neural progenitors. More than 60 candidate partners have been reported, but many lack the mechanistic validation available for dynein, LIS1 and CENP-F; these should therefore be considered secondary annotations rather than equivalent core functions. (cabet2020variationspathogènesde pages 5-5, garrott2022nde1andndel1 pages 6-7)
Biallelic NDE1 loss-of-function causes an autosomal-recessive spectrum encompassing extreme congenital microcephaly, microlissencephaly/lissencephaly, microhydranencephaly and fetal brain disruption. Common associated findings include profound developmental impairment, severely reduced cerebral hemispheres, simplified or absent gyration, ventriculomegaly, callosal agenesis and variable cerebellar abnormalities. Open Targets likewise links NDE1 to lissencephaly 4, microlissencephaly and NDE1-related microhydranencephaly, but its other locus-level associations should not be interpreted as equally established monogenic NDE1 disorders. (OpenTargets Search: -NDE1, garrott2022nde1andndel1 pages 2-4, bakircioglu2011theessentialrole pages 9-11)
Two foundational 2011 studies provide strong human-genetic evidence. Alkuraya et al. found homozygous frameshifts c.684_685del, p.Pro229Trpfs*85, and c.733dup, p.Leu245Profs*70 in two consanguineous families. Both segregated with disease and were absent from more than 200 controls and the then-available 1000 Genomes data. The truncations disrupt C-terminal interaction/localization determinants. Wild-type GFP-NDE1 localized to centrosomes in 293T cells, whereas p.Leu245Profs70 formed noncentrosomal aggregates or remained diffusely cytoplasmic. One affected child had a head circumference of 32 cm at 3.5 years—11.1 standard deviations below the mean*. Published May 13, 2011; DOI: https://doi.org/10.1016/j.ajhg.2011.04.003. (alkuraya2011humanmutationsin pages 4-6)
Bakircioglu et al. independently linked biallelic NDE1 mutations to extreme microcephaly with disordered cortical lamination. The human phenotype involved an estimated approximately 90% reduction in brain size, compared with roughly 33% in Nde1-deficient mice, highlighting the exceptional dependence of human corticogenesis on NDE1. Published May 13, 2011; DOI: https://doi.org/10.1016/j.ajhg.2011.03.019. (bakircioglu2011theessentialrole pages 9-11)
The established application is molecular diagnosis and genetic counseling, not targeted pharmacotherapy. NDE1 should be assessed in severe prenatal or congenital microcephaly with simplified gyration or microlissencephaly, particularly in consanguineous families. Sequencing is also important when a patient has a 16p13.11 deletion: disease can result when the remaining NDE1 allele carries a recessive pathogenic variant. Conversely, neurodevelopmental findings in carriers of a larger 16p13.11 deletion or duplication cannot automatically be assigned solely to NDE1 because these recurrent CNVs encompass multiple genes and show variable expressivity. (garrott2022nde1andndel1 pages 13-14, garrott2022nde1andndel1 pages 2-4, alkuraya2011humanmutationsin pages 4-6)
No validated NDE1-directed therapy is established. Ciliary-length and dynein-regulation studies identify CDK5–FBW7–NDE1 and NDE1–LIS1 interfaces as experimental pathway nodes, but systemic manipulation would be difficult because dynein transport, mitosis and ciliary signaling are widespread essential processes. Current translational value therefore lies chiefly in diagnosis, prenatal interpretation, mechanistic classification and development of cellular or organoid disease models. (cabet2020variationspathogènesde pages 5-5, zhao2023nde1promoteslis1mediated pages 1-2)
The major 2023 advance was the direct reconstitution of human NDE1 action on LIS1 and dynein. It replaced the vague description of NDE1 as a generic dynein regulator with a concentration-dependent assembly model: low NDE1 occupancy delivers LIS1 and strongly enhances active-complex formation, whereas excessive occupancy competes with dynactin and inhibits transport. This is currently the most precise biochemical account of NDE1’s primary function. DOI: https://doi.org/10.1038/s41467-023-42907-x. (zhao2023nde1promoteslis1mediated pages 1-2, zhao2023nde1promoteslis1mediated pages 4-5)
The most relevant 2024 developmental study used single-cell RNA sequencing, spatial transcriptomics and functional experiments to separate NDE1 from NDEL1. It found complementary enrichment of NDE1 in neural progenitors and NDEL1 in postmitotic neurons, reinforcing an NDE1-centered role in progenitor proliferation and interkinetic nuclear migration. Its patient finding—somatic mosaic NDEL1 p.Arg105Pro in two individuals with cortical malformations—belongs to NDEL1 biology and should not be entered as an NDE1 disease variant. DOI: https://doi.org/10.1007/s00401-023-02665-y. (tsai2024novellissencephalyassociatedndel1 pages 17-18)
The following table consolidates the functional annotation and evidence hierarchy.
| Annotation dimension | Best-supported conclusion | Experimental evidence | Key quantitative detail | Source/date/DOI URL |
|---|---|---|---|---|
| Identity, domains, and isoforms | The target is human NDE1/NudE (UniProt Q9NXR1), a nonenzymatic NudE-family phosphoprotein encoded at 16p13.11. It is distinct from NDEL1. The canonical 335-aa protein contains an extended N-terminal coiled-coil/NUDE region and a flexible, largely disordered C terminus; alternative terminal exons produce distinct isoforms. | Transcript annotation, sequence comparison, electron microscopy, cross-linking mass spectrometry, and isoform-specific interaction assays. Full-length NDE1 forms dimers, tetramers, and polymers with a folded-back architecture. | Human NDE1 and NDEL1 are 56% identical and 69% similar. Reviews describe 15 human transcripts, many predicted; two major brain isoforms differ at the final exon. | Soares et al., September 2012, DOI; Monda and Cheeseman, September 2018, DOI; Soto-Perez et al., December 2020, DOI (monda2018nde1promotesdiverse pages 1-2, garrott2022nde1andndel1 pages 2-4, sotoperez2020roleofnde1 pages 2-3) |
| Dynein-LIS1 mechanism | NDE1 is a transient LIS1-recruitment and dynein-assembly factor, not an enzyme or conventional cargo adaptor. Its N-terminal region binds the dynein intermediate chain and LIS1, recruits LIS1 to autoinhibited dynein, and promotes dynein-dynactin-adaptor assembly. Dynactin association displaces NDE1 before processive movement. | Purified human proteins, binding assays, and single-molecule reconstitution of dynein-dynactin-BicDR1 motility. NDE1 also competes with PAFAH1B alpha2 for LIS1. Residues 1-190 are sufficient for activation and high-concentration inhibition. | With LIS1, 1-10 nM NDE1 increased processive-run frequency by as much as 16-fold, versus up to 2.6-fold for LIS1 alone. NDE1 at 10 nM alone had little effect, whereas 1,000 nM nearly abolished motility. | Zhao et al., 2023, Nature Communications 14:7221, DOI (zhao2023nde1promoteslis1mediated pages 1-2, zhao2023nde1promoteslis1mediated pages 4-5) |
| Localization | NDE1 is cytoplasmic and centrosomal during interphase and is recruited in a cell-cycle-dependent manner to the nuclear envelope, centrosomes, spindle poles, spindle, kinetochores, and ciliary base. Golgi phenotypes reflect dynein regulation rather than proof that NDE1 is a permanent Golgi component. | Immunofluorescence in human HeLa, SK-N-SH, and neuroepithelial cells; phosphorylation-mutant studies; ciliary-complex imaging; and depletion-rescue experiments. | Centrosomal NDE1 decreases during metaphase and anaphase. In neuroepithelial stem cells, it is centrosomal in interphase/prophase and decorates the spindle in metaphase. | Bakircioglu et al., May 2011, DOI; Garrott et al., April 2022, DOI (garrott2022nde1andndel1 pages 4-6, garrott2022nde1andndel1 pages 10-11, bakircioglu2011theessentialrole pages 9-11) |
| Mitosis and Golgi organization | NDE1 supports dynein-dependent centrosome positioning, spindle assembly and pole focusing, kinetochore function, mitotic timing, and pericentrosomal Golgi organization. Dependence on LIS1 differs by task. | Inducible CRISPR depletion/replacement, domain-specific mutants, live-cell mitotic timing, morphology, and RNAi rescue. The NDE1-LIS1 interaction is required for spindle-pole focusing and Golgi organization but is largely dispensable for centrosome placement. | NDE1/NDEL1 co-depletion produces stronger Golgi dispersal than depletion of either paralog alone. NDE1 has the stronger effect on kinetochore recruitment. | Monda and Cheeseman, September 2018, DOI; Garrott et al., April 2022, DOI (garrott2022nde1andndel1 pages 4-6, monda2018nde1promotesdiverse pages 1-2, garrott2022nde1andndel1 pages 10-11, garrott2022nde1andndel1 pages 6-7) |
| Primary-cilium control | NDE1 is a negative regulator of ciliary length and a component of a cilium-disassembly complex. At the ciliary base it cooperates with dynein-associated machinery, Aurora A, OFD1, and CPAP to promote resorption and cell-cycle re-entry. CDK5 phosphorylation enables SCF-FBW7-dependent ubiquitylation and degradation of NDE1 during ciliogenesis. | RNAi, overexpression, cilium-length measurements, phosphorylation and ubiquitylation assays, proteasome experiments, patient-derived neural progenitors, and organoids. | Excess NDE1 shortens cilia; depletion or defective recruitment produces elongated cilia, delayed resorption, and delayed cell-cycle re-entry. Exact effect sizes vary by model. | Maskey et al., October 2015, DOI; Gabriel et al., 2016, DOI (cabet2020variationspathogènesde pages 5-5, garrott2022nde1andndel1 pages 13-14, garrott2022nde1andndel1 pages 6-7) |
| Neural progenitors and cortical development | NDE1 coordinates apical interkinetic nuclear migration, G2-M progression, cilium-dependent G1-S entry, spindle behavior, and progenitor maintenance. Postmitotic neuronal migration involves partly overlapping NDE1 and NDEL1 functions. | In-utero shRNA electroporation, cell-cycle markers, live nuclear-migration analysis, paralog-specific depletion/rescue, mouse genetics, and human fetal expression. | NDE1-depleted progenitors arrest during apical nuclear migration, G2-M, and cilium-regulated G1-S. NDEL1 depletion does not reproduce these progenitor defects, although NDEL1 overexpression rescues some NDE1-loss effects. | Doobin et al., August 2016, DOI; Soto-Perez et al., December 2020, DOI; Garrott et al., April 2022, DOI (garrott2022nde1andndel1 pages 4-6, garrott2022nde1andndel1 pages 2-4, garrott2022nde1andndel1 pages 6-7, sotoperez2020roleofnde1 pages 2-3) |
| Human disease and clinical application | Biallelic NDE1 loss-of-function variants cause autosomal-recessive extreme congenital microcephaly with microlissencephaly/lissencephaly, microhydranencephaly or fetal brain disruption, severe developmental impairment, and variable callosal or cerebellar abnormalities. NDE1 sequencing is especially relevant when one allele is deleted by a 16p13.11 CNV. | Homozygosity mapping, familial segregation, sequencing, control screening, MRI, neuropathology, and mutant-protein localization. Frameshift proteins lose normal centrosomal localization. | Reported variants include c.684_685del (p.Pro229Trpfs85) and c.733dup (p.Leu245Profs70); both segregated with disease and were absent from more than 200 controls. One child had a head circumference 11.1 SD below the mean. Human loss can reduce brain size by approximately 90%. | Bakircioglu et al., May 2011, DOI; Alkuraya et al., May 2011, DOI (OpenTargets Search: -NDE1, bakircioglu2011theessentialrole pages 9-11, alkuraya2011humanmutationsin pages 4-6) |
| NDE1 versus NDEL1 | NDEL1 is a related but separate protein. Shared partners and rescue in selected assays do not establish full redundancy. NDE1 is preferentially associated with cycling neural progenitors and interkinetic nuclear migration, whereas NDEL1 is relatively enriched in postmitotic neurons and nucleokinesis. | Paralog-specific RNAi/rescue, single-cell RNA sequencing, spatial transcriptomics, in-utero electroporation, and patient-variant analysis. | The 2024 study's two patients carried somatic mosaic NDEL1 p.Arg105Pro, not an NDE1 variant; this result must not be assigned to Q9NXR1. | Tsai et al., January 2024, DOI; Garrott et al., April 2022, DOI (garrott2022nde1andndel1 pages 4-6, garrott2022nde1andndel1 pages 2-4, tsai2024novellissencephalyassociatedndel1 pages 17-18) |
| Key uncertainties | The core LIS1-delivery role is well supported, but NDE1 stoichiometry, phosphorylation-dependent switching, cargo specificity, and division of labor with NDEL1 remain unresolved. The isoform-specific proteasome association requires further in-vivo validation. Multigene 16p13.11 CNV phenotypes cannot automatically be attributed to NDE1 alone. | Purified and cellular studies show context-dependent activation and inhibition; expert reviews emphasize effects of concentration, phosphorylation, isoform, paralog, and assay design. | The same reconstituted system showed activation at 1-10 nM NDE1 with LIS1 but near-complete inhibition at 1 micromolar. More than 60 proposed interactors have been reported, but many lack detailed mechanistic validation. | Zhao et al., 2023, DOI; Garrott et al., April 2022, DOI; Cabet et al., October 2020, DOI (cabet2020variationspathogènesde pages 5-5, garrott2022nde1andndel1 pages 2-4, garrott2022nde1andndel1 pages 10-11, zhao2023nde1promoteslis1mediated pages 1-2) |
Table: Evidence table summarizing the identity, molecular mechanism, localization, cellular roles, disease relevance, and principal uncertainties for human NDE1/Q9NXR1. NDE1-specific findings are explicitly separated from evidence concerning its paralog NDEL1.
The evidence supports a high-confidence primary annotation: NDE1 is a spatially and temporally regulated scaffold that couples LIS1 to cytoplasmic dynein during motor-complex assembly and uses related interactions to organize microtubule-dependent structures. Its strongest physiological requirement is in dividing neural progenitors, where dynein regulation intersects with centrosome behavior, interkinetic nuclear migration, mitosis and ciliary resorption. (garrott2022nde1andndel1 pages 4-6, bakircioglu2011theessentialrole pages 9-11, zhao2023nde1promoteslis1mediated pages 1-2)
Several boundaries remain important. First, NDE1 and NDEL1 share partners but are not interchangeable, and older “NudE/L” experiments cannot always identify which paralog produced the effect. Second, NDE1 can activate or inhibit dynein depending on concentration and partner occupancy; results from overexpression require caution. Third, the physiological role of the isoform-specific proteasome association and many reported interaction partners remains incompletely validated. Finally, phenotypes from recurrent 16p13.11 CNVs are multigenic and should be separated from the highly penetrant recessive disorder caused by biallelic NDE1 loss. (monda2018nde1promotesdiverse pages 1-2, garrott2022nde1andndel1 pages 2-4, garrott2022nde1andndel1 pages 6-7, zhao2023nde1promoteslis1mediated pages 1-2)
Overall, the molecular, cellular and human-genetic evidence is mutually consistent: disruption of an NDE1-centered dynein/centrosome/cilium regulatory network reduces neural-progenitor output and impairs cortical organization, producing one of the most severe known human microcephaly phenotypes.
References
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