| Vesicle Associated Membrane Protein 4 | |
|---|---|
| Gene Symbol | VAMP4 |
| Full Name | Vesicle Associated Membrane Protein 4 |
| Chromosome | 1q42.2 |
| NCBI Gene ID | [8675](https://www.ncbi.nlm.nih.gov/gene/8675) |
| OMIM | 602808 |
| Ensembl ID | ENSG00000143222 |
| UniProt ID | [O75379](https://www.uniprot.org/uniprot/O75379) |
| Protein Class | v-SNARE, Synaptobrevins |
| Associated Diseases | [Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease) |
VAMP4 (Vesicle-Associated Membrane Protein 4), also known as synaptobrevin-4, is a member of the v-SNARE (vesicle-soluble N-ethylmaleimide-sensitive fusion protein attachment protein receptor) family that plays essential roles in synaptic vesicle trafficking and regulated exocytosis. Located on chromosome 1q42.2 with NCBI Gene ID 8675, VAMP4 is a type IV membrane protein with a short N-terminal proline-rich domain followed by a long SNARE motif and a transmembrane domain[1][2].
VAMP4 has emerged as a significant player in neurodegenerative disease research due to its critical involvement in synaptic vesicle function, neurotransmitter release, and membrane trafficking. The protein is particularly notable for its role in regulated secretion pathways that are disrupted in Alzheimer's disease and Parkinson's disease[3][4].
The VAMP4 gene spans approximately 8.5 kb on chromosome 1q42.2 and consists of 5 exons. The gene produces a single transcript encoding a 116-amino acid protein with a molecular weight of approximately 13 kDa.
The VAMP4 protein exhibits characteristic v-SNARE architecture:
VAMP4 forms canonical SNARE complexes with syntaxin and SNAP-25 family proteins. The SNARE motif consists of 16 polar layers (0 to +8 and -7 to -1) with a central ionic layer (0 layer) containing an arginine (R) or glutamine (Q) residue that determines the SNARE type.
VAMP4 exhibits specific expression patterns in the central nervous system:
| Region | Expression Level | Cell Type |
|---|---|---|
| Hippocampus | High | CA1-CA3 pyramidal neurons |
| Cortex | High | Layer V pyramidal neurons |
| Cerebellum | High | Purkinje cells |
| Striatum | Moderate | Medium spiny neurons |
| Substantia nigra | Moderate | Dopaminergic neurons |
VAMP4 primarily localizes to:
VAMP4 is essential for synaptic vesicle fusion and neurotransmitter release[5][6]:
Beyond classical neurotransmission, VAMP4 participates in regulated secretion[2:1][7]:
VAMP4 functions in multiple trafficking pathways[@tan2001]:
VAMP4 dysfunction significantly contributes to Alzheimer's disease pathogenesis[3:1][8]:
VAMP4 alterations in AD include:
Aβ impacts VAMP4 function:
VAMP4 interacts with tau pathology:
VAMP4 involvement in Parkinson's disease spans multiple mechanisms[4:1]:
VAMP4 alterations in PD include:
VAMP4 participates in autophagy[9]:
VAMP4 transport is disrupted in PD[10]:
VAMP4 has been implicated in:
| Condition | Mechanism |
|---|---|
| ALS | Exocytosis impairment in motor neurons |
| Huntington's Disease | Vesicle trafficking dysfunction |
| Frontotemporal Dementia | Synaptic protein alterations |
| Epilepsy | Altered exocytosis kinetics |
VAMP4 shows potential as a biomarker:
Targeting VAMP4 could provide benefits:
| Approach | Rationale | Status |
|---|---|---|
| SNARE stabilizers | Restore function | Preclinical |
| Gene therapy | Increase expression | Experimental |
| Small molecules | Enhance exocytosis | Early development |
VAMP4 interacts with:
VAMP4 associates with:
Scott DZ, et al. VAMP4 is required for synaptic vesicle fusion. J Cell Biol. 2003. ↩︎
Zurenko A, et al. VAMP4 in regulated secretion. Mol Biol Cell. 2001. ↩︎ ↩︎
Steinfels E, et al. VAMP4 in Alzheimer's disease. Neurobiol Aging. 2003. ↩︎ ↩︎
Liu W, et al. VAMP4 and Parkinson's disease. Mov Disord. 2018. ↩︎ ↩︎
Advokat C, et al. VAMP4 in synaptic transmission. J Neurochem. 2002. ↩︎
Martinez-Arca S, et al. VAMP4 and synaptic vesicle life cycle. J Neurosci. 2007. ↩︎
Koch M, et al. VAMP4 in regulated exocytosis. Mol Cell Neurosci. 2011. ↩︎
Gupta N, et al. SNARE proteins in neurodegenerative disease. Nat Rev Neurosci. 2019. ↩︎
Pam S, et al. VAMP4 and autophagy in neurodegeneration. Cell Death Differ. 2016. ↩︎
Bot D, et al. VAMP4 in axonal transport. J Neurosci. 2014. ↩︎