Uncoupling Protein 2 (UCP2)
Overview
flowchart TD
UCP2["UCP2"] -->|"inhibits"| Als["Als"]
UCP2["UCP2"] -->|"activates"| Obesity["Obesity"]
UCP2["UCP2"] -->|"activates"| Inflammation["Inflammation"]
UCP2["UCP2"] -->|"activates"| Als["Als"]
UCP2["UCP2"] -->|"activates"| Immune_Response["Immune Response"]
UCP2["UCP2"] -->|"regulates"| Cardiac["Cardiac"]
UCP2["UCP2"] -->|"regulates"| Ms["Ms"]
UCP2["UCP2"] -->|"regulates"| Ischemia["Ischemia"]
UCP2["UCP2"] -->|"inhibits"| Melanoma["Melanoma"]
UCP2["UCP2"] -->|"inhibits"| Inflammation["Inflammation"]
UCP2["UCP2"] -->|"activates"| Fatty_Liver["Fatty Liver"]
UCP2["UCP2"] -->|"activates"| Diabetes["Diabetes"]
UCP2["UCP2"] -->|"activates"| Aging["Aging"]
UCP2["UCP2"] -->|"activates"| Neuroinflammation["Neuroinflammation"]
style UCP2 fill:#4fc3f7,stroke:#333,color:#000
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Uncoupling Protein 2 (UCP2)
Overview
Mermaid diagram (expand to render)
<table class="infobox infobox-protein">
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 channelThree repeat motifs : Characteristic of mitochondrial carriersNucleotide-binding pocket : Bind nucleotides (ATP, GDP)Matrix and intermembrane space domains : Regulatory regionsUCP2 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:
Proton leak : Dissipates the proton gradient across the inner mitochondrial membraneThermogenesis : Generates heat without ATP productionMetabolic regulation : Modulates cellular energy efficiencyROS Regulation
Mitochondrial ROS reduction : Decreases [reactive oxygen species](/entities/reactive-oxygen-species) productionOxidative stress protection : Limits ROS-induced cellular damageAntioxidant function : Protects against oxidative damageCellular Signaling
Nutrient sensing : Coordinates metabolism with nutrient availabilityInsulin secretion : Modulates pancreatic beta-cell functionImmune regulation : Affects macrophage and T-cell functionRole 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 dynamicsNeuroprotection : UCP2 upregulation protects against MPTP toxicityAlzheimer's Disease UCP2 involvement in AD:
[Amyloid-beta](/proteins/amyloid-beta) toxicity : UCP2 deficiency worsens Aβ-induced neuronal deathMitochondrial dysfunction : Early event in AD pathogenesisCognitive function : UCP2 expression correlates with memory performanceTherapeutic target : UCP2 activators show promise in AD modelsAmyotrophic Lateral Sclerosis
Motoneuron protection : UCP2 overexpression extends survival in SOD1 modelsMitochondrial quality control : Maintains mitochondrial integrityEnergy metabolism : Supports high energy demands of motoneuronsHuntington's Disease
Mitochondrial dysfunction : UCP2 alterations contribute to metabolic deficitsNeuroprotection : UCP2 upregulation improves phenotype in HD modelsEnergy metabolism : Modulates the altered energy metabolism in HDTherapeutic Targeting
UCP2 activators : Genipin, naturally-occurring UCP2 activatorGene therapy : AAV-mediated UCP2 overexpressionMitochondrial-targeted antioxidants : Combine ROS reduction with UCP2 activationKey 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)
See Also
[UCP2 Gene](/genes/ucp2)
[Parkinson's Disease](/diseases/parkinsons-disease)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
[Mitochondrial Dysfunction in Neurodegeneration](/mechanisms/mitochondrial-dysfunction-neurodegeneration)
[Oxidative Stress in Neurodegeneration](/mechanisms/oxidative-stress-neurodegeneration)
[Dopaminergic Neurons](/cell-types/dopaminergic-neurons)
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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