| 2013 |
SEH1L (Seh1L) is a subunit of the GATOR2 complex (together with Mios, WDR24, WDR59, and Sec13), which positively regulates mTORC1 signaling. Inhibition of GATOR2 subunits including Seh1L suppresses mTORC1 signaling; epistasis analysis shows GATOR2 negatively regulates DEPDC5 (a GATOR1 subunit), placing GATOR2 upstream of GATOR1 in the amino acid-sensing pathway to mTORC1. |
siRNA knockdown, epistasis analysis, co-immunoprecipitation, mTORC1 activity assays (phospho-S6K) |
Science |
High |
23723238
|
| 2022 |
Cryo-EM structure of human GATOR2 reveals a 1.1 MDa, two-fold symmetric cage-like architecture. SEH1L and SEC13 are integrated into the octagonal scaffold through β-propeller blade donation (blade insertion), which stabilizes the GATOR2 complex and reveals an evolutionary relationship to the nuclear pore and membrane-coating complexes. The scaffold orients WD40 β-propeller dimers that mediate interactions with SESN2, CASTOR1, and GATOR1. |
Cryo-electron microscopy (cryo-EM) structure determination |
Nature |
High |
35831510
|
| 2025 |
Cryo-EM structures of GATOR2 in inhibitory states (CASTOR1-bound, Sestrin2-bound, and dual-bound) show that Sestrin2 (leucine sensor) interacts specifically with the WDR24-Seh1L subcomplex of GATOR2, inducing conformational movements. HDX-MS confirmed dynamic motions in apo-GATOR2 and its complexes with amino acid sensors. |
Cryo-electron microscopy (cryo-EM), hydrogen-deuterium exchange mass spectrometry (HDX-MS) |
Cell reports |
High |
40742811
|
| 2004 |
Seh1 is identified as a member of the Nup107-160 nuclear pore subcomplex in vertebrates. RNAi-mediated depletion of Seh1 leads to phenotypes similar to knockdown of other Nup107-160 constituents. Seh1, along with all other Nup107-160 complex members, is targeted to kinetochores from prophase to anaphase of mitosis. |
Co-immunoprecipitation, RNAi knockdown, GFP live-cell imaging, immunofluorescence |
Molecular biology of the cell |
High |
15146057
|
| 2007 |
Depletion of Seh1 alone is sufficient to efficiently remove the Nup107-160 complex from kinetochores, causing mitotic delay, impaired chromosome congression, reduced kinetochore tension, and kinetochore-microtubule attachment defects. The presence of the Nup107-160 complex at kinetochores (dependent on Seh1) is required for the recruitment of Crm1 and RanGAP1-RanBP2 to kinetochores. |
siRNA knockdown, immunofluorescence, live-cell imaging, mitotic phenotype analysis |
The EMBO journal |
High |
17363900
|
| 2009 |
Seh1 depletion impairs Aurora B localization to centromeres (the chromosomal passenger complex, CPC), resulting in defects in biorientation and organization of the spindle midzone and midbody. Seh1 regulates chromosome alignment and segregation by controlling centromeric localization of Aurora B; microtubule-kinetochore attachments (assessed by EM) are intact in Seh1-depleted cells. |
siRNA knockdown, immunofluorescence, electron microscopy, live-cell imaging |
Molecular biology of the cell |
High |
19864462
|
| 2018 |
Using chemical genetics (auxin-inducible degron) and quantitative chromosome proteomics, Seh1 is shown to be dispensable for association of the Nup107 complex with mitotic chromosomes, but essential for the association of the GATOR2 complex and nucleoporin Nup153 with mitotic chromosomes. Seh1 is also required at human centromeres for efficient localization of the chromosomal passenger complex (CPC). |
Auxin-inducible degron (chemical genetics), quantitative mass spectrometry-based chromosome proteomics, immunofluorescence |
Journal of cell science |
High |
29618633
|
| 2011 |
In Drosophila, Seh1 (SEH1L ortholog) associates with the product of the missing oocyte (mio) gene (a GATOR2 component). Loss of seh1 in the female germline causes failure of oocytes to maintain the meiotic cycle (pseudo-nurse cell development), phenocopying mio mutants. Mio protein accumulation is greatly diminished in seh1 mutant background, indicating Seh1 stabilizes Mio. Seh1 is dispensable for development of somatic tissues. |
Genetic null allele, co-immunoprecipitation, immunofluorescence, genetic interaction analysis |
Development |
High |
21521741
|
| 2014 |
In Drosophila, GATOR2 components Mio and Seh1 are required to oppose Iml1/GATOR1 activity to prevent constitutive inhibition of TORC1, and their loss causes a block to oocyte growth and development. Epistasis analysis places GATOR2 (including Seh1) as an antagonist of GATOR1 in the TORC1 pathway during oogenesis. |
Genetic null alleles, epistasis analysis, rapamycin treatment, TORC1 activity assays |
Proceedings of the National Academy of Sciences |
High |
25512509
|
| 2011 |
The SEA (Seh1-associated) complex in yeast contains Seh1 and Sec13 (along with Npr2, Npr3, and Sea1-Sea4). Combined computational and biochemical analysis indicates SEA complex proteins possess structural characteristics similar to membrane coating complexes (COPI, COPII, NPC). The SEA complex dynamically associates with the vacuole in vivo and functions in intracellular trafficking, amino acid biogenesis, and response to nitrogen starvation. |
Affinity purification/mass spectrometry, computational structural prediction, live-cell fluorescence microscopy, genetic assays |
Molecular & cellular proteomics |
High |
21454883
|
| 2013 |
In yeast, SEACAT (the GATOR2 equivalent subcomplex containing Seh1, Sea2-4, and Sec13) antagonizes the GAP function of SEACIT (GATOR1 equivalent) toward Gtr1 (RagA ortholog), as demonstrated by genetic epistasis. Loss of SEACAT subunits suppresses TORC1 activity downstream of amino acid signaling. |
Genetic epistasis analysis, TORC1 activity assays |
Cell cycle |
Medium |
23974112
|
| 2016 |
In Drosophila, Seh1 (GATOR2 component) has a TORC1-independent role in the regulation of lysosome function and autophagic flux, in addition to its role in TORC1 activation. This TORC1-independent lysosome function is shared with other GATOR2 members Mio and Wdr24. |
Genetic null alleles, epistasis analysis with GATOR1 components, lysosome acidification assays, autophagy flux assays |
PLoS genetics |
Medium |
27166823
|
| 2009 |
The crystal structure of Nup85 in complex with Seh1 defines a new tripartite protein element (ancestral coatomer element ACE1) shared with other nucleoporins and vesicle coat proteins. Seh1 forms the short arm of the Y-shaped Nup84 complex together with Nup85. Functional sites predicted by analogy to COPII coat interactions were verified experimentally. |
Crystal structure determination, mutagenesis, functional interaction assays |
Communicative & integrative biology |
Medium |
19641729
|
| 2023 |
Seh1 (SEH1L) maintains Schwann cell homeostasis by safeguarding genome stability through mediating the interaction between SETDB1 and KAP1. Loss of Seh1 disrupts this interaction, derepresses endogenous retroviruses, and triggers ZBP1-dependent necroptosis in Schwann cells, leading to progressive reduction of non-myelinating Schwann cells and neural fiber degeneration. |
Conditional knockout, co-immunoprecipitation, transcriptome analysis, immunofluorescence, necroptosis assays |
Cell reports |
Medium |
37453065
|
| 2024 |
Seh1 cooperates with the NuRD transcription repressor complex at the nuclear periphery to repress p21 expression in neural stem cells. Depletion of Seh1 in radial glial progenitors derepresses p21, leading to defective neural progenitor proliferation and differentiation, impaired neurogenesis, and microcephaly. This function is independent of nucleocytoplasmic transport defects. |
Conditional knockout, transcriptome analysis, p21 knockdown rescue experiment, co-localization/nuclear periphery association assays |
Developmental cell |
Medium |
38272027
|
| 2021 |
Seh1 and Nup43 are dispensable in pluripotent mouse embryonic stem cells but required for normal cell growth rates and viability upon neuroectodermal differentiation, as well as maintenance of proper nuclear pore complex density. An N-terminally truncated Nup85 mutation that greatly impairs interaction with Seh1 reduces NPC density but does not affect proliferation or differentiation, indicating Y-complex integrity (not NPC number per se) is critical. |
CRISPR/Cas9 genome editing, cell viability assays, NPC density quantification by electron microscopy/immunofluorescence, differentiation assays |
Journal of cell science |
Medium |
34037234
|
| 2004 |
In S. pombe, Seh1 (ortholog) is localized at the nuclear envelope as part of the conserved Nup107-120 complex. Deletion of Nup107-120 complex members causes mRNA export defects and cell division defects (abnormal septa, mitotic spindles, chromosome missegregation) at restrictive temperature; genetic interaction with the Ran GTPase pathway is demonstrated by synthetic toxicity of a nonfunctional Ran-GFP allele in nup120 and nup133 deletion backgrounds. |
Deletion mutants, fluorescence microscopy, mRNA export assays, genetic epistasis/synthetic lethality |
Molecular and cellular biology |
Medium |
15226438
|
| 2007 |
Seh1 (yeast) directly interacts with importin Kap95 as detected by the Bead Halo equilibrium binding assay, suggesting a role for this interaction during nuclear pore complex biogenesis. |
Bead Halo in vitro binding assay (equilibrium-based) |
Molecular & cellular proteomics |
Low |
17897934
|
| 2018 |
SEH1 contains a RV[S/T]F motif (PP1-binding motif) that is phosphorylated specifically during mitosis, predominantly by Aurora B kinase, abrogating PP1 binding to SEH1. This represents a mechanism by which Aurora B and PP1 coordinate to control mitotic progression via dissolution of PP1 holoenzymes. |
Phospho-specific antibody (RVpSF), mass spectrometry, kinase assays, immunoprecipitation |
Science signaling |
Medium |
29764992
|
| 2026 |
In yeast, cryo-EM structure of the SEAC (GATOR) bound to the EGOC (Ragulator-Rag GTPase complex) shows a single SEAC interacts with two EGOC molecules via SEACIT, binding exclusively to the 'active' EGOC conformation, without involvement of SEACAT (which contains Seh1/Sea2-4/Sec13). The Sea2 β-propeller domain of SEACAT is required for robust amino acid signaling to TORC1, suggesting it recruits a GAP inhibitor for fast signaling. |
Cryo-electron microscopy, genetic analysis (deletion mutants), TORC1 activity assays |
Nature structural & molecular biology |
Medium |
41680390
|
| 2024 |
SEH1L silencing activates the ATF3/HMOX1/GPX4 axis, decreases mitochondrial membrane potential and GSH while increasing ROS and MDA, inducing ferroptosis and suppressing hepatocellular carcinoma progression. Knockdown of ATF3 reverses these effects. These findings were validated in vitro and in vivo (subcutaneous tumor model). |
siRNA knockdown, next-generation sequencing, RT-qPCR, western blotting, flow cytometry, xenograft model |
Apoptosis |
Low |
39095556
|
| 2023 |
Nup133 and Seh1, two components of the Y-complex NPC subassembly, independently regulate a subset of genes including Lhx1 and Nup210l during neuroectodermal differentiation. Gene regulation by Seh1 in neural progenitors appears independent of nuclear pore basket integrity (Seh1 depletion causes only mild reduction in NPC density). |
Transcriptomic analysis, siRNA/genetic depletion, NPC density quantification, differentiation assays |
Journal of cell science |
Low |
37305998
|