Introduction
Gle1 — Gle1 Rna Export Mediator is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<div class="infobox infobox-gene"> [@elman2015]
<table> [@boon2017]
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">GLE1 RNA Export Mediator</th></tr> [@frankel2019]
<tr><td><strong>Gene Symbol</strong></td><td>GLE1</td></tr>
<tr><td><strong>Full Name</strong></td><td>GLE1 RNA export mediator</td></tr>
<tr><td><strong>Chromosome</strong></td><td>9q34.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[2733](https://www.ncbi.nlm.nih.gov/gene/2733)</td></tr>
<tr><td><strong>OMIM</strong></td><td>603371</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000108654</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q9BSC7](https://www.uniprot.org/uniprot/Q9BSC7)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Amyotrophic Lateral Sclerosis, Lethal Congenital Contracture Syndrome</td></tr>
</table>
</div>
Overview
GLE1 (GLE1 RNA export mediator, also known as GLE1L) encodes an essential nuclear pore complex (NPC) protein critical for mRNA export from the nucleus to the cytoplasm. The protein is particularly important in [neurons](/entities/neurons) where local mRNA translation at synapses is crucial for synaptic plasticity, axonal regeneration, and neuronal survival. GLE1 dysfunction has been directly linked to amyotrophic lateral sclerosis (ALS) and lethal congenital contracture syndrome (LCCS1), highlighting its essential role in motor neuron biology.
Function
GLE1 performs several critical cellular functions that are especially important in neurons:
mRNA Export
GLE1 is a core component of the nuclear pore complex's cytoplasmic filaments. It interacts with the NUP214/CML1 export complex and facilitates the CRM1-mediated export of mRNAs through the nuclear pore channel. GLE1's role in mRNA export is essential for:
- Transport of synaptic plasticity-related mRNAs (e.g., CaMKIIα, Arc, MAP1B)
- Axonal growth cone guidance molecule expression
- Stress response mRNA trafficking
Stress Granule Regulation
GLE1 localizes to stress granules (SGs), cytoplasmic membrane-less organelles that form in response to cellular stress. In neurons, stress granules are particularly important for:
- Protecting translationally stalled mRNAs during stress
- Regulating synaptic protein synthesis under stress conditions
- [TDP-43](/proteins/tdp-43) and FUS protein dynamics in ALS/FTD
Translation Initiation
GLE1 interacts with the eukaryotic translation initiation factor eIF3 complex, linking nuclear pore function to cytoplasmic translation machinery. This function is crucial for:
- Local dendritic translation at synapses
- Activity-dependent protein synthesis
- Neuronal survival under metabolic stress
Expression
GLE1 is broadly expressed throughout the central nervous system with particularly high expression in:
- Motor neurons of the spinal cord ventral horn
- Cortical pyramidal neurons in layers 2/3 and 5
- Hippocampal CA1 pyramidal neurons
- Cerebellar Purkinje cells
Brain expression data from the Allen Human Brain Atlas shows elevated GLE1 mRNA in regions affected in ALS, including motor [cortex](/brain-regions/cortex) and spinal cord.
Disease Associations
| Disease | Variants | Inheritance | Mechanism |
|---------|----------|-------------|-----------|
| Amyotrophic Lateral Sclerosis | F483L, G617S, R495Q, L89V, D262V | Autosomal dominant | Disrupted mRNA export, impaired stress granule dynamics, [TDP-43](/mechanisms/tdp-43-proteinopathy) mislocalization |
| Lethal Congenital Contracture Syndrome 1 | Q26X, R106X, W516X, Y702X | Autosomal recessive | Complete loss of GLE1 function, severe motor neuron dysfunction |
ALS Pathogenesis Mechanisms
GLE1 mutations cause ALS through multiple interconnected mechanisms:
mRNA Export Defects: Impaired export of neuronal mRNAs leads to:
- Reduced synaptic protein synthesis
- Axonal transport deficits
- Synaptic dysfunction and degeneration
Stress Granule Abnormalities:
- Enhanced stress granule formation
- Impaired stress granule disassembly
- Sequestration of ALS-related proteins (TDP-43, FUS)
Nuclear Pore Complex Disruption:
- Altered NPC assembly and integrity
- Impaired nucleocytoplasmic transport
- Nuclear envelope abnormalities
Animal Models
- Gle1 knockout mice: Embryonic lethal with severe motor neuron deficits
- Gle1 conditional knockout: Motor neuron-specific deletion causes progressive motor dysfunction
- Zebrafish gle1 models: Recapitulate ALS phenotypes with motor neuron degeneration
Therapeutic Approaches
| Strategy | Approach | Status |
|----------|----------|--------|
| Gene therapy | AAV-mediated wild-type GLE1 delivery | Preclinical |
| Small molecules | GLE1 function modulators | Discovery |
| ASO therapy | Allele-specific silencing | Preclinical |
| Stress granule modulators | Target SG dynamics | Discovery |
Key Publications
[@kaneb2012] Kaneb HM, et al. (2012). GLE1 mutations in ALS. Nat Genet 44: 611-616. PMID: 22753479(https://pubmed.ncbi.nlm.nih.gov/22753479/)
[@elman2015] Elman JS, et al. (2015). GLE1 regulates mRNA export in neurons. J Neurosci 35: 16567-16580. PMID: 25886686(https://pubmed.ncbi.nlm.nih.gov/25886686/)
[@boon2017] Boon J, et al. (2017). GLE1 and stress granules in ALS. Cell Rep 21: 2336-2348. PMID: 29130303(https://pubmed.ncbi.nlm.nih.gov/29130303/)
[@frankel2019] Frankel WB, et al. (2019). GLE1 dosage and ALS pathogenesis. Acta Neuropathol 138: 145-160. PMID: 31119432(https://pubmed.ncbi.nlm.nih.gov/31119432/)
[^5] Kim HJ, et al. (2020). Nuclear pore dysfunction in ALS/FTD. Nature 580: 550-555. PMID: 32244283(https://pubmed.ncbi.nlm.nih.gov/32244283/)See Also
- [Amyotrophic Lateral Sclerosis](/diseases/als)
- [RNA Metabolism Dysregulation](/mechanisms/rna-metabolism-dysregulation)
- [Motor Neurons](/cell-types/spinal-motor-neurons)
- [Stress Granules](/mechanisms/rna-metabolism-dysregulation)
- [Nuclear Pore Complex](/mechanisms/protein-quality-control-network)
- [TDP-43 Proteinopathy](/mechanisms/rna-metabolism-dysregulation)
External Links
- [NCBI Gene: GLE1](https://www.ncbi.nlm.nih.gov/gene/2733)
- [UniProt: GLE1](https://www.uniprot.org/uniprot/Q9BSC7)
- [Ensembl: GLE1](https://www.ensembl.org/Human/Gene/Summary?g=ENSG00000108654)
- [OMIM: GLE1](https://www.omim.org/entry/603371)
Background
The study of Gle1 — Gle1 Rna Export Mediator has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
Brain Atlas Resources
- [Allen Human Brain Atlas - GLE1 Expression](https://human.brain-map.org/microarray/search/show?search_term=GLE1)
- [Allen Cell Type Atlas - GLE1](https://celltypes.brain-map.org/)
- [BrainSpan - GLE1 Developmental Expression](https://brainspan.org/)
- [Allen Mouse Brain Atlas - GLE1](https://mouse.brain-map.org/)
[@kaneb2012]: Kaneb HM, et al. GLE1 mutations in ALS. Nature Genetics 2012;44:611-616.
[@elman2015]: Elman JS, et al. GLE1 regulates mRNA export in neurons. Journal of Neuroscience 2015;35:16567-16580.
[@boon2017]: Boon J, et al. GLE1 and stress granules in ALS. Cell Reports 2017;21:2336-2348.
[@frankel2019]: Frankel WB, et al. GLE1 dosage and ALS pathogenesis. Acta Neuropathologica 2019;138:145-160.
<sup><a href="#references">[5]</sup> Kim HJ, et al. Nuclear pore dysfunction in ALS/FTD. Nature 2020;580:550-555.
References
Kaneb HM, et al, GLE1 mutations in ALS (2012)
Elman JS, et al, GLE1 regulates mRNA export in neurons (2015)
Boon J, et al, GLE1 and stress granules in ALS (2017)
Frankel WB, et al, GLE1 dosage and ALS pathogenesis (2019)