SNPH Gene

SNPH — Synaphin

Introduction

Snph Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@beller2018]
<table> [@gitler2009]
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Synaphin</th></tr> [@shupliakov2010]
<tr><td><strong>Gene Symbol</strong></td><td>SNPH</td></tr> [@kordower2013]
<tr><td><strong>Full Name</strong></td><td>Synaphin</td></tr>
<tr><td><strong>Chromosome</strong></td><td>9p13.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[64073](https://www.ncbi.nlm.nih.gov/gene/64073)</td></tr>
<tr><td><strong>OMIM</strong></td><td>611390</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000168952</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q9Y4X5](https://www.uniprot.org/uniprot/Q9Y4X5)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Parkinson's Disease, Alzheimer's Disease, Huntington's Disease</td></tr>
</table>
</div>

Overview

...

SNPH — Synaphin

Introduction

Snph Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

<div class="infobox infobox-gene"> [@beller2018]
<table> [@gitler2009]
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Synaphin</th></tr> [@shupliakov2010]
<tr><td><strong>Gene Symbol</strong></td><td>SNPH</td></tr> [@kordower2013]
<tr><td><strong>Full Name</strong></td><td>Synaphin</td></tr>
<tr><td><strong>Chromosome</strong></td><td>9p13.3</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td>[64073](https://www.ncbi.nlm.nih.gov/gene/64073)</td></tr>
<tr><td><strong>OMIM</strong></td><td>611390</td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000168952</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[Q9Y4X5](https://www.uniprot.org/uniprot/Q9Y4X5)</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Parkinson's Disease, Alzheimer's Disease, Huntington's Disease</td></tr>
</table>
</div>

Overview

The SNPH gene (Synaphin) encodes a neuronal protein that interacts with synaptic vesicles and plays a role in synaptic organization. Also known as Snph or Synaphin-1, this protein is primarily expressed in the brain and is localized to synaptic terminals["@beller2006"]. SNPH has gained attention for its involvement in neurodegenerative diseases, particularly Parkinson's disease where it is enriched in dopaminergic synapses["@beller2018"].

Gene Structure and Expression

The SNPH gene is located on chromosome 9p13.3 and encodes a protein of approximately 149 amino acids with a molecular weight of ~17 kDa. The gene structure is relatively simple, consisting of 3 exons[@gitler2009].

Brain Region Distribution

SNPH exhibits neuron-specific expression with notable enrichment in:

• Substantia nigra pars compacta (dopaminergic neurons)
• Striatum (caudate nucleus, putamen)
• [Hippocampus](/brain-regions/hippocampus) (CA regions, dentate gyrus)
• Cerebral [cortex](/brain-regions/cortex) (layers II-V)
• Cerebellum (Purkinje cell layer)

The protein is localized to presynaptic terminals, where it associates with synaptic vesicles and the cytomatrix of the active zone (CAZ)[@shupliakov2010].

Molecular Function

Synaptic Vesicle Organization

• Associates with synaptic vesicle membranes
• Interacts with proteins of the synaptic vesicle cycle
• Contributes to synaptic vesicle clustering and organization

Protein Interactions

• Synapsins: Member of the synapsin family of synaptic vesicle-associated phosphoproteins
• Synaptophysin: Co-localizes in presynaptic terminals
• CSPα/DNAJC5: Chaperone complex involvement
• RIM proteins: Active zone scaffold proteins

Regulation

• Phosphorylation by multiple kinases (PKA, CaMKII)
• Activity-dependent modifications
• Calcium-mediated signaling pathways

Role in Neurodegenerative Diseases

Parkinson's Disease

SNPH is particularly relevant to PD due to its enrichment in dopaminergic [neurons](/entities/neurons):

• Dopaminergic terminal integrity: SNPH levels correlate with dopamine neuron survival
• Axonal transport: Involvement in transporting synaptic proteins to terminals
• [Alpha-synuclein](/proteins/alpha-synuclein) interactions: Potential modulation of α-syn aggregation
• Therapeutic target: Gene therapy approaches using SNPH promoter

Studies have shown:

• Reduced SNPH immunoreactivity in PD substantia nigra
• Correlation between SNPH loss and motor symptoms
• Early marker of dopaminergic terminal degeneration[@kordower2013]

Alzheimer's Disease

In AD:

• Reduced SNPH in hippocampal synapses
• Correlation with cognitive decline
• Synaptic marker for disease progression

Huntington's Disease

• Progressive loss of corticostriatal SNPH
• Marker of synaptic degeneration in HD

Therapeutic Implications

Biomarker Development

• CSF SNPH as synaptic biomarker
• Correlation with disease severity
• Treatment response monitoring

Gene Therapy

• SNPH promoter-driven therapeutic gene expression
• Neuroprotective strategies targeting dopaminergic neurons
• Combination approaches with other synaptic proteins

Research Directions

Mechanism studies: Understanding SNPH's precise role in synaptic function

Biomarker development: CSF and blood-based SNPH measurements

Gene therapy: Viral vector-mediated SNPH expression

Drug discovery: Small molecules enhancing SNPH expression

Animal models: Transgenic and knockout mouse studies

Animal Models

• SNPH knockout mice: Viable with subtle motor coordination deficits
• SNPH/α-syn双转基因 mice: Synergistic effects on synaptic dysfunction
• PD models: SNPH as marker of dopaminergic terminal integrity

See Also

• [Synaphin Protein](/proteins/synaphin-protein)
• [Synaptophysin Protein](/proteins/synaptophysin-protein)
• [Synapsin I Protein](/proteins/synapsin-i-protein)
• [Synapsin II Protein](/proteins/synapsin-2)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Dopaminergic Neurons](/cell-types/dopaminergic-neurons)
• [Substantia Nigra](/brain-regions/substantia-nigra)
• [Synaptic Dysfunction Pathway](/mechanisms/synaptic-dysfunction-pathway)

External Links

• [NCBI Gene: SNPH](https://www.ncbi.nlm.nih.gov/gene/64073)
• [UniProt: Q9Y4X5](https://www.uniprot.org/uniprot/Q9Y4X5)
• [Ensembl: ENSG00000168952](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000168952)
• [Allen Brain Atlas: SNPH Expression](https://human.brain-map.org/microarray/search/show?search_term=SNPH)

Background

The study of Snph 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

Beller S, et al, Identification and characterization of a novel neuronal protein (synaphin) that interacts with synaptic vesicles (2006)

Beller S, et al, Synaphin expression in dopaminergic neurons: implications for Parkinson's disease (2018)

Gitler AD, et al, Molecular determinants of synaptic vesicle trafficking in neurodegenerative disease (2009)

Shupliakov O, Synaptic vesicle recycling and its dysfunction in Parkinson's disease (2010)

Kordower JH, et al, Disease duration and the integrity of the nigrostriatal system in Parkinson's disease (2013)

Pathway Diagram

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