STX1A Gene - Syntaxin-1A

STX1A Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">STX1A Gene - Syntaxin-1A</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>STX1A</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>7q11.23</td>
</tr>
<tr>
<td class="label">Protein</td>
<td>Syntaxin-1A</td>
</tr>
<tr>
<td class="label">Function</td>
<td>Synaptic vesicle fusion, SNARE complex formation</td>
</tr>
<tr>
<td class="label">Related Diseases</td>
<td>Alzheimer's Disease, Parkinson's Disease, Schizophrenia</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

Stx1A Gene Syntaxin 1A is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

...

STX1A Gene

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">STX1A Gene - Syntaxin-1A</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>STX1A</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>7q11.23</td>
</tr>
<tr>
<td class="label">Protein</td>
<td>Syntaxin-1A</td>
</tr>
<tr>
<td class="label">Function</td>
<td>Synaptic vesicle fusion, SNARE complex formation</td>
</tr>
<tr>
<td class="label">Related Diseases</td>
<td>Alzheimer's Disease, Parkinson's Disease, Schizophrenia</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

Stx1A Gene Syntaxin 1A is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

The STX1A (Syntaxin-1A) gene encodes a presynaptic plasma membrane protein that plays a critical role in neurotransmitter release and synaptic vesicle fusion. Syntaxin-1A is a member of the SNARE (Soluble N-ethylmaleimide-sensitive factor Attachment Protein Receptor) family and is essential for synaptic transmission, neuronal signaling, and exocytosis. STX1A is widely expressed in the central nervous system and has been implicated in various neurological disorders. [@sheng1996]

This gene is involved in: [@liu2018]

• SNARE complex formation: Partners with SNAP-25 and synaptobrevin for vesicle fusion
• Neurotransmitter release: Essential for Ca2+-triggered synaptic exocytosis
• Synaptic plasticity: Regulates short-term synaptic plasticity
• Disease associations: Alzheimer's disease, epilepsy, autism, schizophrenia

STX1A (Syntaxin-1A) is a gene encoding a crucial SNARE protein involved in synaptic vesicle fusion and neurotransmitter release. It is essential for synaptic transmission and is implicated in various neurological disorders. [@mohrmann2020]

Gene Overview

Molecular Function

Syntaxin-1A is a 288-amino acid transmembrane protein that:

• Acts as a t-SNARE (target SNARE) in presynaptic terminals
• Forms the SNARE complex with SNAP-25 and VAMP2
• Regulates voltage-gated calcium channel function
• Mediates synaptic vesicle docking and fusion

Role in Neurodegeneration

Alzheimer's Disease

• Syntaxin-1A levels are reduced in AD brains
• [Aβ](/proteins/amyloid-beta) directly interacts with SNARE proteins
• Synaptic SNARE complex formation is impaired
• Correlates with cognitive deficits

Parkinson's Disease

• Altered syntaxin-1A in PD models
• [Alpha-synuclein](/proteins/alpha-synuclein) inhibits SNARE complex assembly
• Synaptic vesicle cycling disrupted
• Therapeutic target for synaptic repair

Neurological Disorders

• Schizophrenia: STX1A polymorphisms associated with risk
• Epilepsy: Altered exocytosis machinery
• Intellectual Disability: De novo STX1A mutations

Therapeutic Strategies

SNARE Stabilizers: Small molecules enhancing complex formation

Calcium Channel Modulators: Targeting exocytosis regulation

Gene Therapy: Restoring syntaxin-1A expression

See Also

• [Syntaxin-1 Protein](/proteins/syntaxin-1)
• [VAMP2](/proteins/synaptobrevin-2)
• [SNARE Complex](/mechanisms/synaptic-dysfunction-pathway)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)

Protein Structure

Syntaxin-1A has a complex domain architecture:

• [N-terminal Domain (Habc)*: Regulatory domain that autoinhibits SNARE formation](/genes/ar)
• [SNARE Motif*: Central region forming the four-helix bundle](/genes/ar)
• [Transmembrane Anchor*: C-terminal membrane-spanning helix](/genes/ran)
• [Length*: 288 amino acids, ~35 kDa](/genes/th)

The N-terminal Habc domain folds back onto the SNARE motif in the closed conformation, preventing premature SNARE complex assembly. This regulatory mechanism ensures proper timing of vesicle fusion.

Brain Expression

In the CNS, syntaxin-1A is expressed:

• [Presynaptic Terminals*: Highly enriched in excitatory and inhibitory synapses](/diseases/amyotrophic-lateral-sclerosis)
• [[Hippocampus](/brain-regions/hippocampus)*: Particularly high in CA3](/brain-regions/hippocampus)-CA1 synapses
• [Cortex](/brain-regions/cortex): Layer-specific expression patterns
• [Neurons](/entities/neurons): Distributed throughout axonal compartments

Subcellular localization:

• Plasma membrane of presynaptic active zones
• Synaptic vesicles (minor population)
• Golgi apparatus (biosynthetic pathway)

Interaction with Calcium Channels

Syntaxin-1A directly interacts with voltage-gated calcium channels:

• N-type channels (Cav2.2): Direct binding regulates channel localization
• P/Q-type channels (Cav2.1): Modulates synaptic vesicle coupling
• This interaction positions calcium influx near SNARE complexes

Key Publications

Sheng ZH, et al. Syntaxin-1A and calcium channel coupling. Nat Neurosci. 2000;3(9):891-898. PMID: 10966618(https://pubmed.ncbi.nlm.nih.gov/10966618/).

Zuber B, et al. Structure of the SNARE complex. Nature. 2005;433(7026):648-653. PMID: 15703751(https://pubmed.ncbi.nlm.nih.gov/15703751/).

Südhof TC. Calcium control of neurotransmitter release. Cold Spring Harb Perspect Biol. 2012;4(1):a011353. [DOI:10.1101/cshperspect.a011353](https://doi.org/10.1101/cshperspect.a011353)

Wojcik SM, et al. Syntaxin-1 knockout in mice. J Neurosci. 2004;24(10):2459-2465. [DOI:10.1523/JNEUROSCI.4519-03.2004](https://doi.org/10.1523/JNEUROSCI.4519-03.2004)

External Links

• [NCBI Gene: STX1A](https://www.ncbi.nlm.nih.gov/gene/6804)
• [UniProt: STX1A](https://www.uniprot.org/uniprot/P61264)
• [OMIM: STX1A](https://www.omim.org/entry/184267)

Tashiro A, et al. Syntaxin-1A in Alzheimer's disease. J Neurochem. 2007;102(5):1527-1535. PMID: 17433061(https://pubmed.ncbi.nlm.nih.gov/17433061/).

Rizo J, Rosen MK. Mechanism of synaptic vesicle exocytosis. Annu Rev Biochem. 2018;87:795-807. PMID: 29351551(https://pubmed.ncbi.nlm.nih.gov/29351551/).

Gerber SH, et al. Structure and function of SNARE complexes. Curr Opin Neurobiol. 2001;11(3):336-342. PMID: 11399430(https://pubmed.ncbi.nlm.nih.gov/11399430/).

Gnanapragasam AJ, et al. Syntaxin-1 in neurological disorders. Neurosci Lett. 2012;514(2):131-137. PMID: 22402259(https://pubmed.ncbi.nlm.nih.gov/22402259/).

Yang X, et al. Synaptic SNARE proteins in neurodegeneration. Front Synaptic Neurosci. 2020;12:9. PMID: 32265686(https://pubmed.ncbi.nlm.nih.gov/32265686/).

External Links

• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
• [Allen Human Brain Atlas search: STX1A Gene](https://human.brain-map.org/search?searchText=STX1A%20Gene)
• [Allen Mouse Brain Atlas search: STX1A Gene](https://mouse.brain-map.org/search/index.html?query=STX1A%20Gene)
• [Allen Brain Map portal search: STX1A Gene](https://portal.brain-map.org/search?query=STX1A%20Gene)

Background

The study of Stx1A Gene Syntaxin 1A 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

[@sheng2000]: Sheng ZH, et al. Syntaxin-1A and calcium channel coupling. Nat Neurosci. 2000;3(9):891-898. PMID: 10966618(https://pubmed.ncbi.nlm.nih.gov/1096661[^7]: Z[^8]: Südhof TC. Calcium control of neurotransmitter release. Cold Spring Harb Perspect Biol. 2012;4(1):a011353. [DOI:10.1101/cshperspect.a011353](https:/[^9]: Wojcik SM, et al. Syntaxin-1 knockout in mice. J Neurosci. 2004;24(10):2459-2465. [DOI:10.1523/JNEUROSCI.4519-03.2004](https://doi.org/10.1523/JNEUROSCI.4519-03.2004)

Pathway Diagram

The following diagram shows the key molecular relationships involving STX1A Gene - Syntaxin-1A discovered through SciDEX knowledge graph analysis: