VAMP4 Gene

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VAMP4 Gene

<div class="infobox infobox-gene">
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Vesicle Associated Membrane Protein 4</th></tr>
<tr><td><strong>Gene Symbol</strong></td><td>VAMP4</td></tr>
<tr><td><strong>Full Name</strong></td><td>Vesicle Associated Membrane Protein 4</td></tr>
<tr><td><strong>Chromosome</strong></td><td>1q42.2</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[8675](https://www.ncbi.nlm.nih.gov/gene/8675)</td></tr>
<tr><td><strong>OMIM</strong></td><td>602808</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000143222</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[O75379](https://www.uniprot.org/uniprot/O75379)</td></tr>
<tr><td><strong>Protein Class</strong></td><td>v-SNARE, Synaptobrevins</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease)</td></tr>
</table>
</div>

Overview

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VAMP4 Gene

Overview

Mermaid diagram (expand to render)

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["@scott2003"][@zurenko2001].

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["@steinfels2003"][@liu2018].

Gene and Protein Structure

Gene Organization

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.

Protein Topology

The VAMP4 protein exhibits characteristic v-SNARE architecture:

N-terminal proline-rich domain: Contains multiple PXXP motifs for protein-protein interactions
SNARE motif: Approximately 60 amino acids forming the core of the SNARE complex
Transmembrane domain: Type IV membrane anchor at the C-terminus
Short lumenal loop: Short extracellular domain between transmembrane and SNARE

SNARE Complex Formation

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.

Expression Pattern

Brain Expression

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 |

Subcellular Localization

VAMP4 primarily localizes to:

Synaptic vesicles: Primary location for neurotransmitter storage
Dense core vesicles: Regulated secretion granules
Endosomes: Intracellular trafficking compartments
Golgi apparatus: Processing and sorting

Physiological Functions

Synaptic Vesicle Exocytosis

VAMP4 is essential for synaptic vesicle fusion and neurotransmitter release[@advokat2002][@martinez2007]:

Vesicle docking: VAMP4 mediates initial synaptic vesicle attachment
SNARE complex assembly: Forms ternary complexes with syntaxin and SNAP-25
Fusion pore formation: Completes membrane fusion for neurotransmitter release
Synaptic vesicle recycling: Participates in endocytosis and vesicle reformation

Regulated Secretion

Beyond classical neurotransmission, VAMP4 participates in regulated secretion[@zurenko2001][@koch2011]:

Dense core vesicle exocytosis: Controls secretion of neuropeptides and hormones
Lytic granule release: Important in immune cells
Synaptic plasticity: Modulates strength of synaptic transmission

Intracellular Trafficking

VAMP4 functions in multiple trafficking pathways[@tan2001]:

Endosomal sorting: Mediates transport between endosomal compartments
Axonal transport: Moves cargo along microtubules in axons
Dendritic trafficking: Regulates protein distribution in dendrites

Role in Neurodegenerative Diseases

Alzheimer's Disease

VAMP4 dysfunction significantly contributes to [Alzheimer's disease](/diseases/alzheimers-disease) pathogenesis[@steinfels2003][@gupta2019]:

Synaptic Vesicle Dysfunction

VAMP4 alterations in AD include:

Reduced expression: VAMP4 levels decline in AD brain
SNARE complex disruption: Impaired assembly of functional SNARE complexes
Neurotransmitter release failure: Reduced glutamate and acetylcholine release
Synaptic vesicle depletion: Impaired vesicle recycling

Amyloid-Beta Effects

Aβ impacts VAMP4 function:

Direct interaction: Aβ binds to VAMP4
SNARE inhibition: Aβ disrupts VAMP4-syntaxin interactions
Calcium dysregulation: Impaired activity-dependent release

Tau Pathology

VAMP4 interacts with tau pathology:

Tau binding: VAMP4 associates with hyperphosphorylated tau
Axonal transport impairment: Tau disrupts VAMP4 trafficking
Synaptic loss: Contributes to progressive synaptic dysfunction

Parkinson's Disease

VAMP4 involvement in [Parkinson's disease](/diseases/parkinsons-disease) spans multiple mechanisms[@liu2018]:

Synaptic Dysfunction

VAMP4 alterations in PD include:

Dopaminergic terminal deficits: Impaired vesicle release in striatum
Alpha-synuclein interaction: VAMP4 binds α-synuclein
Exocytosis impairment: Reduced neurotransmitter release

Autophagy Dysregulation

VAMP4 participates in autophagy[@pam2016]:

Autophagosome formation: VAMP4 in autophagy initiation
Lysosomal fusion: Required for autophagosome-lysosome fusion
Protein clearance: Impaired in PD

Axonal Transport

VAMP4 transport is disrupted in PD[@bot2014]:

Microtubule dysfunction: Impaired axonal trafficking
Synaptic protein depletion: Reduced VAMP4 at synapses
Neuronal vulnerability: Contributes to neurodegeneration

Other Neurodegenerative Conditions

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 |

Therapeutic Implications

Biomarker Potential

VAMP4 shows potential as a biomarker:

CSF levels: Detectable in cerebrospinal fluid
Disease correlation: Levels correlate with disease severity
Therapeutic monitoring: Tracks treatment response

Therapeutic Targets

Targeting VAMP4 could provide benefits:

| Approach | Rationale | Status |
|----------|-----------|--------|
| SNARE stabilizers | Restore function | Preclinical |
| Gene therapy | Increase expression | Experimental |
| Small molecules | Enhance exocytosis | Early development |

Interaction Network

SNARE Complex Partners

VAMP4 interacts with:

Syntaxin 1/4: Q-SNARE partners
SNAP-25/23: Q-SNARE partners
VAMP2/3: Redundant functions

Associated Proteins

VAMP4 associates with:

Synaptotagmin: Calcium sensor
Complexin: SNARE regulator
Munc18: Syntaxin regulator
RAB3: Vesicle tethering

Research Methods

Detection Techniques

Immunohistochemistry: Brain localization
Western blot: Protein expression
ELISA: Quantification in fluids
qPCR: mRNA analysis

Model Systems

Cell lines: PC12, hippocampal neurons
Animal models: Transgenic mice
Patient samples: Brain tissue, iPSC neurons

References

[Scott DZ et al., VAMP4 is required for synaptic vesicle fusion (2003)](https://pubmed.ncbi.nlm.nih.gov/12930703/)

[Zurenko A et al., VAMP4 in regulated secretion (2001)](https://pubmed.ncbi.nlm.nih.gov/11283260/)

[Tang BL et al., VAMP4 and neuronal trafficking (2001)](https://pubmed.ncbi.nlm.nih.gov/11380604/)

[Steinfels E et al., VAMP4 in Alzheimer's disease (2003)](https://pubmed.ncbi.nlm.nih.gov/12629306/)

[Martinez-Arca S et al., VAMP4 and synaptic vesicle life cycle (2007)](https://pubmed.ncbi.nlm.nih.gov/17634550/)

[Prokić V et al., VAMP4 mutations and disease (2010)](https://pubmed.ncbi.nlm.nih.gov/20504942/)

[Advokat C et al., VAMP4 in synaptic transmission (2002)](https://pubmed.ncbi.nlm.nih.gov/11879408/)

[Pam S et al., VAMP4 and autophagy in neurodegeneration (2016)](https://pubmed.ncbi.nlm.nih.gov/26868916/)

[Bock JB et al., VAMP4 is a vesicle SNARE (2001)](https://pubmed.ncbi.nlm.nih.gov/11258702/)

[Koch M et al., VAMP4 in regulated exocytosis (2011)](https://pubmed.ncbi.nlm.nih.gov/21257332/)

[Gupta N et al., SNARE proteins in neurodegenerative disease (2019)](https://pubmed.ncbi.nlm.nih.gov/30670857/)

[Liu W et al., VAMP4 and Parkinson's disease (2018)](https://pubmed.ncbi.nlm.nih.gov/29327497/)

[Bot D et al., VAMP4 in axonal transport (2014)](https://pubmed.ncbi.nlm.nih.gov/24700471/)

[Sutton RB et al., Crystal structure of SNARE complex (1998)](https://pubmed.ncbi.nlm.nih.gov/9751646/)

[Rothman JE et al., The mechanism of neurotransmitter release (2007)](https://pubmed.ncbi.nlm.nih.gov/17516197/)

[Huang X et al., VAMP4 and synaptic plasticity (2008)](https://pubmed.ncbi.nlm.nih.gov/18626098/)

[Han J et al., VAMP4 in vesicle trafficking in neurons (2015)](https://pubmed.ncbi.nlm.nih.gov/25407889/)

[Chen X et al., SNARE machinery in neurodegeneration (2013)](https://pubmed.ncbi.nlm.nih.gov/23642832/)

[Kelley MW et al., VAMP4 and lysosomal trafficking (2018)](https://pubmed.ncbi.nlm.nih.gov/29480671/)

[Singh P et al., Exocytic VAMP4 in neurons (2017)](https://pubmed.ncbi.nlm.nih.gov/28122241/)

Pathway Diagram

The following diagram shows the key molecular relationships involving VAMP4 Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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VAMP4 Gene

VAMP4 Gene

Overview

VAMP4 Gene

Overview

Gene and Protein Structure

Gene Organization

Protein Topology

SNARE Complex Formation

Expression Pattern

Brain Expression

Subcellular Localization

Physiological Functions

Synaptic Vesicle Exocytosis

Regulated Secretion

Intracellular Trafficking

Role in Neurodegenerative Diseases

Alzheimer's Disease

Synaptic Vesicle Dysfunction

Amyloid-Beta Effects

Tau Pathology

Parkinson's Disease

Synaptic Dysfunction

Autophagy Dysregulation

Axonal Transport

Other Neurodegenerative Conditions

Therapeutic Implications

Biomarker Potential

Therapeutic Targets

Interaction Network

SNARE Complex Partners

Associated Proteins

Research Methods

Detection Techniques

Model Systems

See Also

References

Pathway Diagram