CELF1 — CUGBP Elav-Like Family Member 1
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">CELF1 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>CELF1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>CUGBP Elav-Like Family Member 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>11p11.2</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>10658</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>601998</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000131095</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q9UQF0</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/cardiac-hypertrophy" style="color:#ef9a9a">Cardiac Hypertrophy</a>, <a href="/wiki/ms" style="color:#ef9a9a">Ms</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">29 edges</a></td>
</tr>
</table>
Introduction
CELF1 (CUGBP Elav-Like Family Member 1) is an RNA-binding protein encoded by the CELF1 gene located on chromosome 11p11.2. It is also known as CUGBP1 (CUG-binding protein 1) and is a member of the CELF/BRUNOL family of RNA-binding proteins. CELF1 plays crucial roles in post-transcriptional regulation of gene expression, including alternative splicing, mRNA stability, and translation control. [@celf]
CELF1 dysfunction is implicated in several neurodegenerative diseases, particularly [amyotrophic lateral sclerosis (ALS)](/diseases/amyotrophic-lateral-sclerosis), [myotonic dystrophy type 1](/diseases/myotonic-dystrophy), and [Alzheimer's disease](/diseases/alzheimers-disease).[@celf] [@celfa]
The protein encoded by CELF1 is [CELF1 Protein](/proteins/celf1-protein).[@celfa] [@celf2019]
--- [@rna]
Overview
Mermaid diagram (expand to render)
CELF1 is a multifunctional RNA-binding protein that regulates gene expression at multiple levels. The protein contains three RNA recognition motifs (RRMs) that mediate sequence-specific binding to target mRNAs. CELF1 recognizes GU-rich elements (GREs) and CUG repeats in RNA, making it particularly relevant to diseases involving repeat expansions. [@celf1927]
Through its regulatory functions, CELF1 influences:
- Neuronal development and function
- Synaptic plasticity
- Muscle fiber excitability
- Stress responses
Gene Structure
Protein Structure and Function
Domain Architecture
CELF1 contains:
- Three RNA Recognition Motifs (RRMs): RRM1, RRM2, and RRM3
- N-terminal region: Involved in protein-protein interactions
- C-terminal region: Regulatory functions
RNA Binding
CELF1 binds to:
- GU-rich elements (GREs): Common in transcripts regulated during stress
- CUG repeats: Pathogenic in myotonic dystrophy type 1
- AU-rich elements (AREs): Found in unstable mRNAs
Post-Transcriptional Regulation
Alternative Splicing:
CELF1 regulates the splicing of numerous neuronal and muscle-specific exons. It can either promote or repress exon inclusion depending on binding site location and context.
Key splicing targets include:
- [Tau (MAPT)](/genes/mapt) exon 10 (regulated in Alzheimer's)
- [NMDA receptor](/entities/nmda-receptor) subunits
- Calcium channel transcripts
- [Autophagy](/entities/autophagy)-related transcripts
mRNA Stability:CELF1 affects mRNA half-life by binding to AREs and GREs, generally destabilizing target transcripts.
Translation Control:
CELF1 modulates translation through:
- Direct interaction with translation initiation factors
- Regulation of ribosomal protein synthesis
- Stress granule formation
Expression Pattern
Brain Expression
CELF1 is widely expressed in the nervous system:
- Cerebral [cortex](/brain-regions/cortex): [Neurons](/entities/neurons) and glia
- [Hippocampus](/brain-regions/hippocampus): CA regions and dentate gyrus
- Spinal cord: Motor neurons (particularly relevant to ALS)
- Cerebellum: Purkinje cells and granule cells
- Brainstem: Various neuronal populations
Cellular Localization
- Nucleus: Splicing regulation
- Cytoplasm: Translation control
- Stress granules: Formed during cellular stress
- Synaptic terminals: Local translation regulation
Disease Associations
Amyotrophic Lateral Sclerosis (ALS)
CELF1 is a known ALS gene:
- Mutations: D262N, E191K, and others cause familial ALS
- Mechanism: Altered RNA splicing of survival motor neuron (SMN) transcripts
- Pathogenesis: Toxic gain-of-function and disrupted RNA processing
- Related proteins: [TDP-43 (TARDBP)](/genes/tardbp), [FUS](/entities/fus), [SMN1](/genes/smn1)
Myotonic Dystrophy Type 1 (DM1)
CELF1 dysregulation is central to DM1 pathogenesis:
- Trigger: CTG repeat expansion in DMPK gene
- Mechanism: Mutant DMPK RNA sequesters CELF1
- Consequence: Loss of CELF1 function on normal targets
- Phenotype: Muscle weakness, myotonia, cardiac conduction defects
Alzheimer's Disease
CELF1 contributes to AD pathogenesis:
- [Tau](/proteins/tau) splicing: Regulates tau exon 10 inclusion
- Alternative splicing: Affects [amyloid precursor protein](/entities/app-protein) (APP) processing
- Stress responses: Involved in cellular stress pathways
Parkinson's Disease
- Altered expression in PD brain
- May affect [alpha-synuclein](/proteins/alpha-synuclein) RNA processing
- Modulates stress granule dynamics
Cardiac Conduction Defects
- Risk variants affect cardiac ion channel splicing
- Relevant to both DM1-associated and isolated cardiac disease
Pathogenic Mechanisms
RNA Toxicity
In diseases with repeat expansions:
- Pathogenic RNA repeats sequester CELF1
- Normal RNA processing is disrupted
- Loss-of-function on physiological targets
Splicing Dysregulation
Key targets affected:
- Tau (MAPT): Mis-splicing leads to 3R/4R tau imbalance
- SMN2: Affects motor neuron survival
- Neuronal ion channels: Altered excitability
Stress Response
CELF1 participates in:
- Stress granule formation
- Translation shutoff during stress
- Cell survival decisions
Therapeutic Implications
RNA-Targeted Therapies
- Antisense oligonucleotides (ASOs) targeting CELF1
- Small molecules modulating CELF1-RNA interactions
- ASOs targeting toxic repeat RNAs
Gene Therapy
- AAV-delivered CELF1 modulators
- CRISPR-based approaches to correct splicing
Repurposing Candidates
- Sodium channel modulators (for myotonia)
- Stress granule inhibitors
Research Models
Cellular Models
- Patient-derived iPSC neurons
- Motor neuron cultures
- Muscle cell models
Animal Models
- Celf1 knockout mice
- Transgenic CELF1 mutant mice
- DM1 mouse models
Biochemical Studies
- CLIP-seq for RNA targets
- Proteomic analysis of CELF1 complexes
Diagnostic and Clinical Relevance
Genetic Testing
- CELF1 sequencing for ALS diagnosis
- Family testing for at-risk individuals
Biomarkers
- CELF1 splicing events as disease biomarkers
- CSF analysis for CELF1-related changes
Prognostic Indicators
- Specific mutations correlate with disease progression
- Splicing patterns predict outcomes
- [CELF1 Protein](/proteins/celf1-protein)
- [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
- [Myotonic Dystrophy](/diseases/myotonic-dystrophy)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Tau Pathology](/mechanisms/tau-pathology)
- [RNA-Binding Proteins in Neurodegeneration](/entities/rna-binding-proteins)
- [--](/proteins/n--cadherin-protein)
External Links
- [NCBI Gene: CELF1](https://www.ncbi.nlm.nih.gov/gene/10658)
- [UniProt: CELF1](https://www.uniprot.org/uniprot/Q9UQF0)
- [OMIM: CELF1](https://omim.org/entry/601998)
- [ALS Variant Viewer: CELF1](https://alsod.iop.kcl.ac.uk/)
Background
The study of Celf1 Gene 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.
References
[Unknown, CELF1 in ALS - Nature Neuroscience (n.d.)](https://doi.org/10.1038/nn.3657)
Unknown, CELF1 Protein - UniProt (n.d.)
[Unknown, CELF1 and Myotonic Dystrophy - Brain Research (2019)](https://doi.org/10.1016/j.brainres.2019.146619)
[Unknown, RNA Binding Proteins in Neurodegeneration - Nature Reviews Neuroscience (n.d.)](https://doi.org/10.1038/nrn3556)
[Unknown, CELF1 in Alzheimer's Disease - Acta Neuropathologica (1927)](https://doi.org/10.1007/s00401-018-1927-7)Pathway Diagram
The following diagram shows the key molecular relationships involving CELF1 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)