The EWSR1 gene (Ewing Sarcoma Breakpoint Region 1) encodes a multifunctional RNA-binding protein that belongs to the FET (FUS, EWSR1, TAF15) family of proteins. Originally identified in Ewing sarcoma where chromosomal translocations create oncogenic fusion proteins, EWSR1 has important physiological functions in RNA metabolism, transcription regulation, and cellular stress responses. Emerging evidence suggests roles for EWSR1 in neurodegenerative diseases, particularly through its involvement in RNA processing and stress granule dynamics.
| Attribute |
Value |
| Gene Symbol |
EWSR1 |
| Full Name |
Ewing Sarcoma Breakpoint Region 1 |
| Chromosomal Location |
22q12.2 |
| NCBI Gene ID |
2128 |
| Ensembl ID |
ENSG00000182944 |
| UniProt ID |
Q01844 |
| Gene Type |
Protein coding |
| OMIM |
133450 |
EWSR1 is an RNA-binding protein with multiple functional domains. The protein contains an N-terminal transcription activation domain rich in glutamine, serine, and tyrosine residues, followed by an RNA-binding domain consisting of multiple RNA recognition motifs (RRMs). The C-terminal region contains a zinc finger domain.
- N-terminal Domain: Low-complexity prion-like domain (transcriptional activation)
- RRM Domains: Three RNA recognition motifs
- Zinc Finger Domain: C2H2-type zinc finger
- RGG Boxes: Arginine-glycine-glycine repeat regions
EWSR1 performs diverse cellular functions:
- Transcription Regulation: Acts as transcriptional activator and co-activator
- RNA Processing: Alternative splicing, RNA transport, stability
- Stress Response: Formation of stress granules
- DNA Repair: Involved in DNA damage response
- Cell Signaling: Modulates various signaling pathways
- Predominantly nuclear
- Shuttles between nucleus and cytoplasm
- Localizes to stress granules under cellular stress
- Associates with various RNA-protein complexes
EWSR1 is most famously involved in Ewing sarcoma:
- Chromosomal translocations create oncogenic fusion genes
- EWSR1-FLI1 (most common): t(11;22)(q24;q12)
- EWSR1-ERG and other variants
- Fusion oncoproteins drive tumorigenesis
Emerging evidence links EWSR1 to neurodegeneration:
- Amyotrophic Lateral Sclerosis (ALS): EWSR1 aggregates in ALS
- Frontotemporal Dementia (FTD): TDP-43 pathology related
- Alzheimer's Disease: Altered expression in AD brains
- Stress Granule Dynamics: Implicated in RNP granule biology
- Cancer: Various sarcomas and carcinomas
- Developmental Disorders: Rare EWSR1 variants
| Translocation |
Partner |
Cancer Type |
| t(11;22) |
FLI1 |
Ewing sarcoma |
| t(21;22) |
ERG |
Ewing sarcoma |
| t(2;22) |
FEV |
Ewing sarcoma |
| t(16;22) |
ETV1 |
Sarcomas |
- Altered expression levels in disease
- Post-translational modifications
- Aggregation in disease states
- Fusion Protein Inhibitors: Targeting EWSR1-FLI1
- RNA-binding Modulators: Affecting EWSR1 function
- Stress Granule Modulators: Therapeutic potential
- YK-4-279: EWSR1-FLI1 inhibitor
- TK216: Clinical-stage EWSR1 inhibitor
- Antisense Oligonucleotides: Gene silencing approaches
- Understanding RNA metabolism in disease
- Stress granule targeting
- Gene therapy approaches
| Partner |
Interaction |
| FLI1 |
Fusion oncoprotein |
| TAF15 |
FET family member |
| FUS |
FET family member |
| TDP-43 |
RNA metabolism |
- Various mRNAs
- Non-coding RNAs
- Viral RNAs
- Transcription regulation
- RNA splicing
- DNA damage response
- Stress response
Current research focuses on:
- Understanding EWSR1's normal functions
- Developing targeted therapies for EWSR1 fusions
- Exploring roles in neurodegeneration
- Stress granule biology in disease