HSPE1 Protein

<table class="infobox infobox-protein">
<tr><th class="infobox-header" colspan="2">HSPE1 Protein</th></tr>
<tr><td class="label">Protein Name</td><td>Heat Shock Protein 10 (Hsp10)</td></tr>
<tr><td class="label">Gene</td><td>[HSPE1](/genes/hspe1)</td></tr>
<tr><td class="label">UniProt</td><td><a href="https://www.uniprot.org/uniprot/P61604" target="_blank">P61604</a></td></tr>
<tr><td class="label">Molecular Weight</td><td>~10.9 kDa (nonamer)</td></tr>
<tr><td class="label">Subcellular Localization</td><td>Mitochondria, Cytoplasm</td></tr>
<tr><td class="label">Protein Family</td><td>Hsp10 co-chaperone family</td></tr>
<tr><td class="label">Aliases</td><td>HSP10, C1orf147, GroES</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/heart-failure" style="color:#ef9a9a">Heart Failure</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">91 edges</a></td>
</tr>
</table>

Heat Shock Protein 10 (Hsp10) (HSPE1)

Introduction

<table class="infobox infobox-protein">
<tr><th class="infobox-header" colspan="2">HSPE1 Protein</th></tr>
<tr><td class="label">Protein Name</td><td>Heat Shock Protein 10 (Hsp10)</td></tr>
<tr><td class="label">Gene</td><td>[HSPE1](/genes/hspe1)</td></tr>
<tr><td class="label">UniProt</td><td><a href="https://www.uniprot.org/uniprot/P61604" target="_blank">P61604</a></td></tr>
<tr><td class="label">Molecular Weight</td><td>~10.9 kDa (nonamer)</td></tr>
<tr><td class="label">Subcellular Localization</td><td>Mitochondria, Cytoplasm</td></tr>
<tr><td class="label">Protein Family</td><td>Hsp10 co-chaperone family</td></tr>
<tr><td class="label">Aliases</td><td>HSP10, C1orf147, GroES</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">Alzheimer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/heart-failure" style="color:#ef9a9a">Heart Failure</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">91 edges</a></td>
</tr>
</table>

Heat Shock Protein 10 (Hsp10) (HSPE1)

Introduction

Heat Shock Protein 10 (Hsp10), encoded by the [HSPE1](/genes/hspe1) gene, is a mitochondrial co-chaperone that plays essential roles in protein folding, mitochondrial function, and cellular stress responses. Originally discovered as the bacterial GroES homolog, Hsp10 functions as a co-chaperone with [HSP70](/proteins/hsp70-protein-family) proteins to facilitate proper protein folding in mitochondria. Growing evidence suggests that Hsp10 is critically involved in neurodegenerative disease mechanisms, particularly in [Alzheimer's disease](/diseases/alzheimers-disease) and [Parkinson's disease](/diseases/parkinsons-disease).

Structure

The HSPE1 protein forms a characteristic heptameric ring structure (seven subunits), each approximately 10.9 kDa in size. This donut-shaped oligomer provides the folding chamber for the mitochondrial [HSP70](/proteins/hsp70-protein-family) (mortalin/mtHsp70). The protein contains:

• N-terminal β-sheet domain involved in oligomerization
• Flexible lid region that covers the central cavity
• Co-chaperone binding site for interaction with HSP70

Normal Function

Mitochondrial Protein Folding

Hsp10 serves as the co-chaperone for mitochondrial [HSP70](/proteins/hsp70-protein-family) (also known as mortalin or Grp75). The Hsp10-Hsp70 complex:

• Facilitates folding of nuclear-encoded mitochondrial proteins
• Prevents aggregation of misfolded proteins in the mitochondrial matrix
• Assists in protein translocation across mitochondrial membranes

Cellular Stress Response

As a heat shock protein, Hsp10 is upregulated during cellular stress:

• Oxidative stress response
• Metabolic stress
• Proteotoxic stress

Immune Modulation

Hsp10 has been implicated in immune modulation and inflammatory responses, with roles in:

• T-cell activation
• Cytokine regulation
• Anti-inflammatory signaling

Role in Neurodegeneration

Alzheimer's Disease

In Alzheimer's disease, Hsp10 appears to play a protective role:

• Amyloid-β clearance: Hsp10 has been shown to interact with [amyloid-beta](/proteins/amyloid-beta) plaques and may facilitate their clearance [1]
• Mitochondrial protection: By maintaining mitochondrial protein folding, Hsp10 helps protect [neurons](/entities/neurons) from amyloid-β-induced mitochondrial dysfunction [2]
• [Tau](/proteins/tau) pathology: Some studies suggest Hsp10 may interact with tau pathology, though this relationship is less characterized

Parkinson's Disease

Hsp10 shows particular promise in Parkinson's disease research:

• [α-Synuclein](/proteins/alpha-synuclein) aggregation: Hsp10 can inhibit α-synuclein [alpha-synuclein](/proteins/alpha-synuclein) aggregation, a key pathological feature of PD [3]
• Mitochondrial quality control: Given the central role of mitochondrial dysfunction in PD, Hsp10's mitochondrial chaperone function is particularly relevant
• Neuroprotection: Studies show Hsp10 can protect dopaminergic neurons from various insults [4]

Other Neurodegenerative Conditions

• Amyotrophic Lateral Sclerosis (ALS): Hsp10 may have protective roles in motor neuron disease
• Huntington's Disease: Involvement in mutant [huntingtin](/proteins/huntingtin) [Huntingtin](/proteins/huntingtin) aggregation clearance
• Prion Diseases: Potential role in prion protein folding

Therapeutic Implications

Hsp10 represents a promising therapeutic target:

Small Molecule Chaperones

Pharmacological upregulation of Hsp10 expression using small molecules is being explored:

• Geranylgeranylacetone (GGA) induces Hsp10 expression
• 15-deoxy-Δ12,14-prostaglandin J2 (15d-PGJ2) activates Hsp10

Gene Therapy Approaches

Gene therapy to increase Hsp10 expression is being investigated:

• AAV-mediated Hsp10 delivery in animal models
• CRISPR-based approaches to enhance Hsp10 expression

Combination Therapy

Hsp10-based combination therapies with other chaperones (e.g., [HSP70](/proteins/hsp70-protein-family)) are being explored for enhanced neuroprotection.

Research Findings

Key research developments:

• Hsp10 levels are altered in various neurodegenerative disease brains
• Hsp10 can cross the [blood-brain barrier](/entities/blood-brain-barrier), making it therapeutically accessible
• Mitochondrial Hsp10/Hsp70 machinery declines with aging, potentially contributing to age-related neurodegeneration

See Also

• [HSPE1 Gene](/genes/hspe1)
• [HSP70 Protein Family](/proteins/hsp70-protein-family)
• [HSP90 Proteins](/proteins/hsp90b1-protein)
• [Molecular Chaperones](/mechanisms/protein-quality-control-network)
• [Alzheimer's Disease Mechanisms](/mechanisms/alzheimers-disease-pathogenesis)
• [Parkinson's Disease Mechanisms](/mechanisms/parkinsons-disease-pathogenesis)

References