SNAPIN Protein

SNAPIN Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">SNAPIN Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>SNAPIN</td>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>SNAPIN</td>
</tr>
<tr>
<td class="label">Synonyms</td>
<td>SNAPAP, Synaptosomal-Associated Protein</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>O95793</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>9342</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>163 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~19 kDa</td>
</tr>
<tr>
<td class="label">Isoelectric Point</td>
<td>9.5</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Synaptic vesicles, presynaptic terminal</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>SNARE proteins</td>
</tr>
<tr>
<td class="label">Partner</td>
<td>Interaction Type</td>
</tr>
<tr>
<td class="label">SNAP-25</td>
<td>Direct binding</td>
</tr>
<tr>
<td class="label">Synaptotagmin</td>
<td>Calcium sensor</td>
</tr>
<tr>
<td class="label">CSPα</td>
<td>Chaperone complex</td>
</tr>
<tr>
<td class="label">Hsc70</td>
<td>Chaperone</td>
</tr>
<tr>
<td class="label">LGI1</td>
<td>ADAM22 complex</td>
</tr>
<tr>
<td class="label">Strategy</td>
<td>Approach</td>
</tr>
<tr>
<td class="labe

SNAPIN Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">SNAPIN Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>SNAPIN</td>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>SNAPIN</td>
</tr>
<tr>
<td class="label">Synonyms</td>
<td>SNAPAP, Synaptosomal-Associated Protein</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>O95793</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>9342</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>163 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>~19 kDa</td>
</tr>
<tr>
<td class="label">Isoelectric Point</td>
<td>9.5</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Synaptic vesicles, presynaptic terminal</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>SNARE proteins</td>
</tr>
<tr>
<td class="label">Partner</td>
<td>Interaction Type</td>
</tr>
<tr>
<td class="label">SNAP-25</td>
<td>Direct binding</td>
</tr>
<tr>
<td class="label">Synaptotagmin</td>
<td>Calcium sensor</td>
</tr>
<tr>
<td class="label">CSPα</td>
<td>Chaperone complex</td>
</tr>
<tr>
<td class="label">Hsc70</td>
<td>Chaperone</td>
</tr>
<tr>
<td class="label">LGI1</td>
<td>ADAM22 complex</td>
</tr>
<tr>
<td class="label">Strategy</td>
<td>Approach</td>
</tr>
<tr>
<td class="label">SNARE modulators</td>
<td>Enhance/complex function</td>
</tr>
<tr>
<td class="label">Gene therapy</td>
<td>AAV-SNAPIN delivery</td>
</tr>
<tr>
<td class="label">[Autophagy](/entities/autophagy) enhancers</td>
<td>Improve protein clearance</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Snapin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

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

SNAPIN (SNAP Associated Protein) is a 163-amino acid protein that functions as a component of the SNARE (Soluble N-ethylmaleimide-sensitive fusion protein Attachment protein REceptor) complex. It plays a critical role in synaptic vesicle trafficking and neurotransmitter release.

Protein Overview

Protein Structure

SNAPIN possesses a relatively simple structure optimized for its role in synaptic vesicle fusion:

Structural Features

• Coiled-coil domain: Located in the central region, mediates SNAP-25 binding
• SNARE motif: Conserved region involved in SNARE complex formation
• N-terminal region: Contains regulatory sequences and interaction sites
• Lysine-rich C-terminus: Contributes to membrane association

Post-Translational Modifications

• Phosphorylation: Serine/threonine phosphorylation modulates function
• Acetylation: N-terminal acetylation influences stability
• Ubiquitination: Regulates protein turnover

Molecular Function

SNARE Complex Assembly

SNAPIN participates in SNARE complex formation:

Synaptic Vesicle Cycle

SNAPIN functions at multiple stages:

• Vesicle docking: Positions vesicles at active zones
• Priming: Prepares vesicles for fusion
• Fusion: Mediates Ca²⁺-triggered release
• Recycling: Participates in vesicle reformation

Protein Interactions

Expression Pattern

SNAPIN is expressed throughout the nervous system:

• Cerebral [cortex](/brain-regions/cortex): High in pyramidal [neurons](/entities/neurons)
• [Hippocampus](/brain-regions/hippocampus): CA1-CA3 pyramidal cells, dentate gyrus
• Cerebellum: Purkinje cells, granule cells
• Basal ganglia: Striatal medium spiny neurons
• Brainstem: Motor and sensory nuclei

Role in Disease

Alzheimer's Disease

SNAPIN involvement in AD:

• Reduced expression in AD brain tissue
• Impaired synaptic vesicle cycling
• Altered autophagy-lysosomal function
• Potential interaction with [APP](/entities/app-protein)/Aβ

Parkinson's Disease

• Modulates dopaminergic vesicle function
• May influence [α-synuclein](/proteins/alpha-synuclein) toxicity
• Altered expression in PD models

Amyotrophic Lateral Sclerosis

• Disrupted synaptic vesicle recycling
• Impaired autophagy pathways
• Motor neuron vulnerability

Epilepsy

• Altered SNARE function in seizure disorders
• Modified neurotransmitter release

Therapeutic Targeting

Research Models

Cell Lines

• HEK293 cells (overexpression studies)
• Neuronal cell lines (differentiation studies)

Animal Models

• Snapin knockout mice
• Transgenic overexpression lines
• Disease model crosses

Overview

Snapin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Background

The study of Snapin 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.

References

^[1] Ilardi JM, et al. (1999). "SNAPIN: a SNARE-associated protein implicated in synaptic transmission." Nature Neuroscience. 2(7): 579-584.

^[2] Teng FY, et al. (2001). "SNAPIN is essential for neurotransmitter release." Journal of Neuroscience. 21(15): 5463-5472.

^[3] Liu Y, et al. (2012). "SNAPIN deficiency leads to autophagy impairment in neurons." Autophagy. 8(10): 1448-1460.

^[4] Zhou Y, et al. (2014). "SNAPIN regulates synaptic vesicle distribution." Journal of Cell Science. 127(Pt 24): 5322-5332.

^[5] Wang J, et al. (2017). "The role of SNAPIN in neurodegenerative diseases." Molecular Neurobiology. 54(8): 6010-6020.

See Also

• [SNAP-25](/proteins/snap-25)
• [SNARE Complex](/proteins/snare-complex)
• [Synaptic Vesicle Proteins](/content/proteins)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [Synaptic Dysfunction](/mechanisms/synaptic-dysfunction)