Uncoupling Protein 2 (UCP2)

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Uncoupling Protein 2 (UCP2)

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Uncoupling Protein 2 (UCP2)

Overview

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Uncoupling Protein 2 (UCP2)

Overview

Mermaid diagram (expand to render)

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">Uncoupling Protein 2 (UCP2)</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td><strong>UCP2</strong></td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Uncoupling 2 (UCP2)</td>
</tr>
<tr>
<td class="label">Type</td>
<td>Protein</td>
</tr>
<tr>
<td class="label">UniProt</td>
<td><a href="https://www.uniprot.org/uniprot/?query=UCP2" target="_blank">Search UniProt</a></td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/cardiac" style="color:#ef9a9a">Cardiac</a>, <a href="/wiki/diabetes" style="color:#ef9a9a">Diabetes</a>, <a href="/wiki/fatty-liver" style="color:#ef9a9a">Fatty Liver</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">76 edges</a></td>
</tr>
</table>

Uncoupling Protein 2 is a protein that ucp2 is a mitochondrial anion carrier protein that uncouples oxidative phosphorylation:. This page describes its structure, normal nervous system function, role in neurodegenerative disease, and potential as a therapeutic target. [@zhang2011]

[@khalife2023]

Structure

UCP2 is a member of the mitochondrial carrier protein family. It contains:

Six transmembrane alpha-helices: Form the mitochondrial inner membrane transport channel
Three repeat motifs: Characteristic of mitochondrial carriers
Nucleotide-binding pocket: Bind nucleotides (ATP, GDP)
Matrix and intermembrane space domains: Regulatory regions

UCP2 forms homodimers in the inner mitochondrial membrane and functions as a regulated proton transporter.

Normal Function

UCP2 is a mitochondrial anion carrier protein that uncouples oxidative phosphorylation:

Energy Metabolism

Proton leak: Dissipates the proton gradient across the inner mitochondrial membrane
Thermogenesis: Generates heat without ATP production
Metabolic regulation: Modulates cellular energy efficiency

ROS Regulation

Mitochondrial ROS reduction: Decreases [reactive oxygen species](/entities/reactive-oxygen-species) production
Oxidative stress protection: Limits ROS-induced cellular damage
Antioxidant function: Protects against oxidative damage

Cellular Signaling

Nutrient sensing: Coordinates metabolism with nutrient availability
Insulin secretion: Modulates pancreatic beta-cell function
Immune regulation: Affects macrophage and T-cell function

Role in Neurodegeneration

Parkinson's Disease

UCP2 plays a significant protective role in PD:

Mitochondrial protection: Maintains mitochondrial function in dopaminergic [neurons](/entities/neurons)
ROS reduction: Decreases oxidative stress in the substantia nigra
[Alpha-synuclein](/proteins/alpha-synuclein) aggregation: May influence aggregation dynamics
Neuroprotection: UCP2 upregulation protects against MPTP toxicity

Alzheimer's Disease

UCP2 involvement in AD:

[Amyloid-beta](/proteins/amyloid-beta) toxicity: UCP2 deficiency worsens Aβ-induced neuronal death
Mitochondrial dysfunction: Early event in AD pathogenesis
Cognitive function: UCP2 expression correlates with memory performance
Therapeutic target: UCP2 activators show promise in AD models

Amyotrophic Lateral Sclerosis

Motoneuron protection: UCP2 overexpression extends survival in SOD1 models
Mitochondrial quality control: Maintains mitochondrial integrity
Energy metabolism: Supports high energy demands of motoneurons

Huntington's Disease

Mitochondrial dysfunction: UCP2 alterations contribute to metabolic deficits
Neuroprotection: UCP2 upregulation improves phenotype in HD models
Energy metabolism: Modulates the altered energy metabolism in HD

Therapeutic Targeting

UCP2 activators: Genipin, naturally-occurring UCP2 activator
Gene therapy: AAV-mediated UCP2 overexpression
Mitochondrial-targeted antioxidants: Combine ROS reduction with UCP2 activation

Key Publications

[Andrews et al., Uncoupling protein-2: a novel therapeutic target for neurodegenerative diseases (2005)](https://doi.org/10.1016/j.tips.2005.08.005)

[Conti et al., UCP2 in Parkinson's disease: The role of mitochondrial uncoupling in neurodegeneration (2019)](https://doi.org/10.1016/j.neuroscience.2019.05.024)

[Du et al., UCP2 protects against amyloid-beta neurotoxicity via mitochondria-dependent pathway (2020)](https://doi.org/10.1016/j.neurobiolaging.2020.03.011)

[Peixoto et al., UCP2 deficiency increases ROS in models of ALS (2018)](https://doi.org/10.1016/j.nbd.2018.04.016)

[Kim-Han et al., The mitochondrial uncoupling protein UCP2: A therapeutic target in neurodegeneration (2021)](https://doi.org/10.1016/j.pharmthera.2021.107859)

External Links

[UniProt P55851](https://www.uniprot.org/uniprot/P55851)
[NIH Genetic Testing Registry - UCP2](https://www.ncbi.nlm.nih.gov/gtr/genes/7351/)
[Human Protein Atlas - UCP2](https://www.proteinatlas.org/ENSG00000175567-UCP2)

References

[Zhang et al., Uncoupling protein 2: A potential target for neurodegenerative diseases (2011) (2011)](https://pubmed.ncbi.nlm.nih.gov/21917523/)

[Lee et al., UCP2 in amyotrophic lateral sclerosis model (2013) (2013)](https://pubmed.ncbi.nlm.nih.gov/24141050/)

[Andrews et al., Ghrelin protects nigrostriatal dopamine function via UCP2 (2011) (2011)](https://pubmed.ncbi.nlm.nih.gov/19906954/)

[Donnelly et al., UCP2 in glial response to stress, neuroprotection (2016) (2016)](https://pubmed.ncbi.nlm.nih.gov/27651753/)

[Ramsden et al., UCP2 as protective stress signal in neuronal injury (2002) (2002)](https://pubmed.ncbi.nlm.nih.gov/12147286/)

[Mercer et al., UCP2 and mitochondrial dysfunction in neurodegenerative diseases (2015) (2015)](https://pubmed.ncbi.nlm.nih.gov/26468156/)

[Pers et al., Mitochondrial uncoupling proteins in the brain: Roles in neurodegeneration (2016) (2016)](https://pubmed.ncbi.nlm.nih.gov/27236505/)

[Volta et al., UCP2 deficiency exacerbates neuroinflammation in Parkinson's disease (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/32864155/)

[Deng et al., UCP2-mediated metabolic regulation in dopaminergic neurons (2018) (2018)](https://pubmed.ncbi.nlm.nih.gov/29898765/)

[Khalife et al., Targeting mitochondrial UCP2 for neuroprotection (2023) (2023)](https://pubmed.ncbi.nlm.nih.gov/38021699/)

Pathway Diagram

The following diagram shows the key molecular relationships involving Uncoupling Protein 2 (UCP2) discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

UCP2

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slug	proteins-ucp2
kg_node_id	UCP2
entity_type	protein
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-91eb66a73b2e
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'proteins-ucp2'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

55%

Debates

0

Incoming

11

Outgoing

28

0 supporting 0 contradicting 0 neutral

View full evidence profile →

Public annotations (0)Annotate on Hypothes.is →

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📗 Cite This Artifact

Uncoupling Protein 2 (UCP2)

Uncoupling Protein 2 (UCP2)

Overview

Uncoupling Protein 2 (UCP2)

Overview

Structure

Normal Function

Energy Metabolism

ROS Regulation

Cellular Signaling

Role in Neurodegeneration

Parkinson's Disease

Alzheimer's Disease

Amyotrophic Lateral Sclerosis

Huntington's Disease

Therapeutic Targeting

Key Publications

See Also

External Links

References

Pathway Diagram

💬 Discussion