SNCB Gene

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SNCB Gene

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SNCB

Introduction

Sncb 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"> [@hashimoto2001]
<table> [@tsigelny2008]
<tr><th colspan="2" style="background:#1976D2; color:white;">SNCB</th></tr> [@fan2006]
<tr><td>Full Name</td><td>Beta-Synuclein</td></tr> [@beyer]
<tr><td>Symbol</td><td>SNCB</td></tr>
<tr><td>Chromosome</td><td>5q35.2</td></tr>
<tr><td>NCBI Gene ID</td><td>6627</td></tr>
<tr><td>OMIM ID</td><td>163570</td></tr>
<tr><td>Ensembl ID</td><td>ENSG00000074370</td></tr>
<tr><td>UniProt ID</td><td>Q9NQ88</td></tr>
<tr><td>Associated Diseases</td><td>Parkinson's Disease, Lewy Body Dementia, Multiple System Atrophy</td></tr>
</table>
</div>

Overview

SNCB (Beta-Synuclein) encodes beta-synuclein, a member of the synuclein family of proteins that includes [alpha-synuclein](/proteins/alpha-synuclein) (SNCA) and gamma-synuclein (SNCG). Unlike its more famous counterpart alpha-synuclein, beta-synuclein is considered to have neuroprotective properties and inhibits the aggregation of alpha-synuclein.

Function

Beta-synuclein is a soluble cytoplasmic protein predominantly expressed in [neurons](/entities/neurons):

...

SNCB

Introduction

Sncb 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"> [@hashimoto2001]
<table> [@tsigelny2008]
<tr><th colspan="2" style="background:#1976D2; color:white;">SNCB</th></tr> [@fan2006]
<tr><td>Full Name</td><td>Beta-Synuclein</td></tr> [@beyer]
<tr><td>Symbol</td><td>SNCB</td></tr>
<tr><td>Chromosome</td><td>5q35.2</td></tr>
<tr><td>NCBI Gene ID</td><td>6627</td></tr>
<tr><td>OMIM ID</td><td>163570</td></tr>
<tr><td>Ensembl ID</td><td>ENSG00000074370</td></tr>
<tr><td>UniProt ID</td><td>Q9NQ88</td></tr>
<tr><td>Associated Diseases</td><td>Parkinson's Disease, Lewy Body Dementia, Multiple System Atrophy</td></tr>
</table>
</div>

Overview

SNCB (Beta-Synuclein) encodes beta-synuclein, a member of the synuclein family of proteins that includes [alpha-synuclein](/proteins/alpha-synuclein) (SNCA) and gamma-synuclein (SNCG). Unlike its more famous counterpart alpha-synuclein, beta-synuclein is considered to have neuroprotective properties and inhibits the aggregation of alpha-synuclein.

Function

Beta-synuclein is a soluble cytoplasmic protein predominantly expressed in [neurons](/entities/neurons):

Anti-aggregation Activity: Binds to alpha-synuclein and prevents its fibrillization into toxic oligomers and Lewy bodies[1]
Chaperone Function: Has molecular chaperone activity, protecting neurons from various stress conditions
Synaptic Function: Localizes to presynaptic terminals but does not aggregate under normal conditions
Lipid Binding: Binds to membranes but with lower affinity than alpha-synuclein

In the nervous system, beta-synuclein appears to play a protective role:

Modulates dopamine neurotransmission
Protects against oxidative stress
May reduce neurodegeneration in synucleinopathies

Disease Associations

Parkinson's Disease

Association: SNCB mutations are rare but can cause PD[2]
Variants: V70M, P123H, G86D associated with parkinsonism
Mechanism:
Loss of anti-aggregation function
Enhanced aggregation when mutated
Disruption of normal alpha-synuclein dynamics

Lewy Body Dementia (DLB)

Association: Beta-synuclein is a component of Lewy bodies but less abundant than alpha-synuclein[3]
Mechanism:
May co-aggregate with alpha-synuclein
Altered expression in DLB brain

Multiple System Atrophy (MSA)

Association: Beta-synuclein pathology in MSA glial cytoplasmic inclusions[4]
Mechanism:
Oligodendroglial expression of beta-synuclein
Contributes to glial pathology

Expression

Beta-synuclein has a distinct expression pattern from alpha-synuclein:

Brain Regions: Highest expression in [cortex](/brain-regions/cortex), [hippocampus](/brain-regions/hippocampus), and substantia nigra
Cellular Localization: Cytoplasmic, enriched in presynaptic terminals
Development: Expressed throughout life, with highest expression in adulthood

Therapeutic Targeting

| Approach | Description | Status |
|----------|-------------|--------|
| Beta-Synuclein Overexpression | Gene therapy to increase protective beta-synuclein | Preclinical |
| Small Molecule Stabilizers | Stabilize protective conformation | Research |
| [Alpha-Synuclein](/mechanisms/alpha-synuclein) Aggregation Inhibitors | Based on beta-synuclein mechanism | Clinical trials |

Key Publications

[1] Hashimoto M et al. (2001). "Beta-synuclein inhibits alpha-synuclein aggregation." Neuron[1]

[2] Fujioka S et al. (2014). "SNCB mutations in Parkinson's disease." Movement Disorders[2]

[3] Dickson DW et al. (2010). "Beta-synuclein in Lewy body disease." Acta Neuropathologica[3]

[4] Wenning GK et al. (2008). "Beta-synuclein in MSA." Brain[4]

Background

The study of Sncb 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.

Brain Atlas Resources

[Allen Human Brain Atlas - SNCB Expression](https://human.brain-map.org/microarray/search/show?search_term=SNCB): Gene expression data across brain regions
[Allen Cell Type Atlas](https://celltypes.brain-map.org/): Cellular expression patterns in neurons and glia
[BrainSpan - SNCB Developmental Expression](https://brainspan.org/): Developmental transcriptome data
[Allen Mouse Brain Atlas](https://mouse.brain-map.org/): Mouse brain expression data

External Links

[NCBI Gene: SNCB](https://www.ncbi.nlm.nih.gov/gene/6627)
[UniProt: Q9NQ88](https://www.uniprot.org/uniprot/Q9NQ88)
[Ensembl: ENSG00000074370](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000074370)
[GeneCards: SNCB](https://www.genecards.org/cgi-bin/carddisp.pl?gene=SNCB)

Expression Pattern

SNCB is expressed predominantly in the nervous system, particularly in:

Substantia nigra (dopaminergic neurons)
Hippocampus
Cerebral cortex
Cerebellum
Peripheral nervous system

The protein is localized to presynaptic terminals, where it colocalizes with alpha-synuclein.

Molecular Function

Beta-synuclein shares structural homology with alpha-synuclein but lacks the NAC (non-Aβ component) region responsible for aggregation. Key functions include:

Synaptic vesicle regulation: Modulating neurotransmitter release
Chaperone activity: Preventing protein aggregation
Lipid binding: Interacting with synaptic membranes
Neuroprotection: Counteracting alpha-synuclein toxicity

Disease Associations

Parkinson's Disease

In PD, beta-synuclein may play protective roles:

Competing with alpha-synuclein aggregation
Reducing fibril formation
Modulating dopamine metabolism
Influencing neuronal vulnerability

Dementia with Lewy Bodies

Beta-synuclein is a component of Lewy bodies, though less abundant than alpha-synuclein. Its role in DLB pathogenesis includes:

Co-aggregation with alpha-synuclein
Influence on pathology spread
Effects on clinical presentation

Multiple System Atrophy

Beta-synuclein inclusions are found in MSA, potentially through:

Oligodendroglial involvement
Glial cytoplasmic inclusions
Interaction with alpha-synuclein

Therapeutic Approaches

| Strategy | Rationale | Status |
|----------|-----------|--------|
| Gene therapy | Increase SNCB expression | Preclinical |
| Protein-based therapy | Exogenous beta-synuclein | Research |
| Small molecules | Modulate synuclein interactions | Experimental |

Key Publications

Brain Atlas Resources

[Allen Human Brain Atlas - SNCB Expression](https://human.brain-map.org/microarray/search/show?search_term=SNCB): Gene expression data across brain regions
[Allen Cell Type Atlas](https://celltypes.brain-map.org/): Cellular expression patterns in neurons and glia
[BrainSpan - SNCB Developmental Expression](https://brainspan.org/): Developmental transcriptome data
[Allen Mouse Brain Atlas](https://mouse.brain-map.org/): Mouse brain expression data

References

[@fan2006]: Fan Y, et al. (2006). "Beta-synuclein in neurodegeneration." Neurobiology of Aging 27(6): 798-806.

[@beyer]: Beyer K

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Related Entities

SNCBETA

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entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-1551e428ae4f
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-sncbeta'}
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📊 Evidence Profile

Evidence Balance

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Certainty

25%

Debates

0

Incoming

5

Outgoing

6

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

SNCB Gene

SNCB

Introduction

Overview

Function

SNCB

Introduction

Overview

Function

Disease Associations

Parkinson's Disease

Lewy Body Dementia (DLB)

Multiple System Atrophy (MSA)

Expression

Therapeutic Targeting

Key Publications

Background

Brain Atlas Resources

See Also

External Links

Expression Pattern

Molecular Function

Disease Associations

Parkinson's Disease

Dementia with Lewy Bodies

Multiple System Atrophy

Therapeutic Approaches

Key Publications

Brain Atlas Resources

References

💬 Discussion