ELAVL3 (ELAV-Like Protein 3), also known as HuC, is a neuron-specific RNA-binding protein encoded by the ELAVL3 gene. It belongs to the ELAV family of RNA-binding proteins characterized by three conserved RNA recognition motifs (RRMs). ELAVL3 is expressed exclusively in neurons and regulates neuronal development, differentiation, plasticity, and survival. In neurodegenerative diseases, ELAVL3 is implicated in ALS, FTD, and AD through its critical role in RNA metabolism, stress granule dynamics, and mRNA stability regulation.
| Property | Value |
|---|---|
| Protein Name | ELAV-Like Protein 3 (HuC) |
| Gene Symbol | ELAVL3 |
| UniProt ID | Q14576 |
| PDB ID | 1ELE, 1ELF |
| Molecular Weight | 39 kDa |
| Protein Length | 366 amino acids |
| Subcellular Localization | Nucleus, Cytoplasm |
| Protein Family | ELAV/Hu family |
| Tissue Specificity | Neuron-specific |
ELAVL3 is one of three neuronal ELAV proteins (ELAVL3/HuC, ELAVL4/HuD, and ELAVL2/HuB). It is expressed during neuronal development and maintained in mature neurons.
ELAVL3 contains three highly conserved RNA recognition motifs (RRMs):
ELAVL3 binds to AU-rich elements (AREs) in mRNA 3' untranslated regions:
ELAVL3 is strongly implicated in ALS pathogenesis:
Research has shown that ELAVL3 is sequestered into RNA foci in ALS patients with C9orf72 expansions, potentially contributing to RNA metabolism dysfunction.
| Brain Region | Expression Level |
|---|---|
| Cerebral Cortex | High |
| Hippocampus | High |
| Cerebellum | High |
| Brainstem | Moderate |
| Spinal Cord | Moderate |
| Peripheral neurons | Low |
ELAVL3 is expressed throughout the central nervous system, with highest expression in cortical and hippocampal neurons.
| Approach | Description | Status |
|---|---|---|
| Stress granule modulators | Prevent pathological aggregation | Research |
| RNA therapeutics | Restore proper mRNA processing | Preclinical |
| Gene therapy | Increase ELAVL3 expression | Research |
| Kinase inhibitors | Modify phosphorylation | Research |
The study of Elavl3 Protein 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.
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[2] Pascale A, et al. Neuron-specific ELAV proteins: markers and modulators of neuronal differentiation and function. J Neurochem. 2004;91(4):774-785. PMID:15488020.
[3] Bolognani F, et al. Neuronal ELAVL proteins: in vivo functions in neuronal development and pathology. RNA Biol. 2009;6(3):336-341. PMID:19535914.
[4] Liu Y, et al. ELAVL3 in ALS and FTD. Nat Neurosci. 2019;22(5):737-748. PMID:31043741.
[5] Vuong CK, et al. RBPMS2 and ELAVL3 in motor neuron disease. Brain. 2020;143(8):e69. PMID:32681156.
[6] Kang MJ, et al. Stress-responsive regulation of ELAVL3. Cell Stress. 2021;5(9):127-139. PMID:34553021.