alpha-SNAP Protein (NSF Attachment Protein Alpha)

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alpha-SNAP Protein (NSF Attachment Protein Alpha)

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alpha-SNAP Protein (NSF Attachment Protein Alpha)

Overview

Alpha Snap Protein (Nsf Attachment Protein Alpha) 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

Alpha Snap Protein (Nsf Attachment Protein Alpha) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@ref1999]

<div class="infobox infobox-protein"> [@ref1999a]

alpha-SNAP [@ref1993]

| | |
|---|---|
| Protein Name | alpha-SNAP |
| Gene | [NAPA](/genes/napa) |
| UniProt ID | [P54920](https://www.uniprot.org/uniprot/P54920) |
| Molecular Weight | ~33 kDa |
| Subcellular Localization | Cytoplasm, synaptic vesicles |
| Protein Family | SNAP family |
| Associated Diseases | [Spinal Muscular Atrophy](/diseases/spinal-muscular-atrophy), [Synaptic Dysfunction](/mechanisms/synaptic-dysfunction), [Neurodegeneration](/diseases/neurodegeneration) |

</div>

Structure

alpha-SNAP is a soluble cytosolic protein consisting of:

Three alpha-helical domains that mediate binding to SNARE complexes
An N-terminal coiled-coil region for SNARE interaction
Multiple sites for NSF binding

...

alpha-SNAP Protein (NSF Attachment Protein Alpha)

Overview

Alpha Snap Protein (Nsf Attachment Protein Alpha) 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

Alpha Snap Protein (Nsf Attachment Protein Alpha) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@ref1999]

<div class="infobox infobox-protein"> [@ref1999a]

alpha-SNAP [@ref1993]

| | |
|---|---|
| Protein Name | alpha-SNAP |
| Gene | [NAPA](/genes/napa) |
| UniProt ID | [P54920](https://www.uniprot.org/uniprot/P54920) |
| Molecular Weight | ~33 kDa |
| Subcellular Localization | Cytoplasm, synaptic vesicles |
| Protein Family | SNAP family |
| Associated Diseases | [Spinal Muscular Atrophy](/diseases/spinal-muscular-atrophy), [Synaptic Dysfunction](/mechanisms/synaptic-dysfunction), [Neurodegeneration](/diseases/neurodegeneration) |

</div>

Structure

alpha-SNAP is a soluble cytosolic protein consisting of:

Three alpha-helical domains that mediate binding to SNARE complexes
An N-terminal coiled-coil region for SNARE interaction
Multiple sites for NSF binding

The protein forms a trimeric complex with NSF and adopts an elongated structure that wraps around the SNARE complex. alpha-SNAP contains multiple binding sites that allow simultaneous interaction with NSF and SNARE proteins.

Normal Function in the Nervous System

alpha-SNAP is essential for synaptic vesicle recycling:

SNARE complex binding: After synaptic vesicle fusion, alpha-SNAP binds to the assembled SNARE complex (syntaxin, SNAP-25, synaptobrevin).

NSF recruitment: alpha-SNAP recruits NSF (N-ethylmaleimide-sensitive fusion protein) to the SNARE complex.

ATP-dependent disassembly: NSF, with its cofactor ATP, catalyzes the disassembly of the SNARE complex, allowing SNARE proteins to be recycled for new rounds of vesicle fusion.

Synaptic vesicle replenishment: This recycling is critical for maintaining synaptic vesicle pools and sustaining neurotransmission.

alpha-SNAP also functions in other membrane trafficking pathways including:

ER-Golgi transport
Golgi-vacuole/lysosome transport
Endocytic recycling

Role in Disease

Dysfunction of alpha-SNAP leads to severe neurological consequences:

Spinal Muscular Atrophy (SMA):

Impaired SNARE recycling in motor [neurons](/entities/neurons)
Defective synaptic vesicle replenishment
Reduced neurotransmitter release at neuromuscular junctions
Motor neuron degeneration due to excitotoxicity

Synaptic dysfunction:

Depletion of synaptic vesicle pools
Impaired short-term synaptic plasticity
Reduced quantal content
Failure of sustained synaptic transmission

Neurodegeneration:

Accumulation of stalled SNARE complexes
Impaired protein quality control
ER stress response activation
Ultimately neuronal [apoptosis](/entities/apoptosis)

Therapeutic Targeting

Therapeutic approaches for alpha-SNAP dysfunction:

Gene therapy: AAV-mediated NAPA delivery to restore alpha-SNAP function in motor neurons.

Small molecule enhancers: Compounds that enhance SNARE complex disassembly or stabilize NSF function.

Proteostasis modulators: Enhance protein folding and degradation pathways to compensate for synaptic protein dysfunction.

Neurotrophic factors: Support motor neuron survival while addressing underlying SNARE defects.

Key Publications

[UniProt Entry](https://www.uniprot.org/uniprot/P54920)

[NCBI Gene Entry](https://www.ncbi.nlm.nih.gov/gene/8775)

Cross-Links

[Gene: NAPA](/genes/napa)
[Spinal Muscular Atrophy](/diseases/spinal-muscular-atrophy), [Synaptic Dysfunction](/mechanisms/synaptic-dysfunction), [Neurodegeneration](/diseases/neurodegeneration)

Overview

Alpha Snap Protein (Nsf Attachment Protein Alpha) 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 Alpha Snap Protein (Nsf Attachment Protein Alpha) 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.

External Links

[PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
[Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
[Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References

[Unknown, 1348745 (1995)](https://doi.org/10.1074/jbc.270.10.5260)

[Unknown, 8621491 (1999)](https://doi.org/10.1023/a:1006907810073)

[Unknown, 10449412 (1999)](https://doi.org/10.1016/s0167-4889(99)

[Unknown, 15525714 (1993)](https://doi.org/10.1016/0092-8674(93)

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Related Entities

NAPAPROTEIN

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_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

50%

Debates

0

Incoming

10

Outgoing

11

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

alpha-SNAP Protein (NSF Attachment Protein Alpha)

alpha-SNAP Protein (NSF Attachment Protein Alpha)

Overview

Introduction

Structure

alpha-SNAP Protein (NSF Attachment Protein Alpha)

Overview

Introduction

Structure

Normal Function in the Nervous System

Role in Disease

Therapeutic Targeting

Key Publications

Cross-Links

Overview

Background

See Also

External Links

References

💬 Discussion