HSPBP1

HSPBP1

<div class="infobox infobox-gene">
<div class="infobox-header">HSPBP1</div>

Overview

HSPA1A is a human gene whose product hSPBP1** (Hsp70 Binding Protein 1), also known as FISP1 (Hsp70-interacting protein), is a co-chaperone that modulates Hsp70 family protein function. It contains a J domain and interacts with Hsp70 proteins to regulate their activity in protein quality control. Variants in HSPA1A have been implicated in Alzheimer's Disease, Parkinson's Disease, Amyotrophic Lateral Sclerosis. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration. [@targeting2021]

HSPBP1

<div class="infobox infobox-gene">
<div class="infobox-header">HSPBP1</div>

Overview

HSPA1A is a human gene whose product hSPBP1** (Hsp70 Binding Protein 1), also known as FISP1 (Hsp70-interacting protein), is a co-chaperone that modulates Hsp70 family protein function. It contains a J domain and interacts with Hsp70 proteins to regulate their activity in protein quality control. Variants in HSPA1A have been implicated in Alzheimer's Disease, Parkinson's Disease, Amyotrophic Lateral Sclerosis. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration. [@targeting2021]

<div class="infobox-row"> [@hsphsp2018]
<div class="infobox-label">Gene Symbol</div> [@hspbp2017]
<div class="infobox-value">HSPBP1</div> [@hsp2020a]
</div>
<div class="infobox-row">
<div class="infobox-label">Full Name</div>
<div class="infobox-value">Hsp70 Binding Protein 1</div>
</div>
<div class="infobox-row">
<div class="infobox-label">Chromosomal Location</div>
<div class="infobox-value">19q13.32</div>
</div>
<div class="infobox-row">
<div class="infobox-label">NCBI Gene ID</div>
<div class="infobox-value">[23640](https://www.ncbi.nlm.nih.gov/gene/23640)</div>
</div>
<div class="infobox-row">
<div class="infobox-label">OMIM</div>
<div class="infobox-value">[609377](https://www.omim.org/entry/609377)</div>
</div>
<div class="infobox-row">
<div class="infobox-label">Ensembl ID</div>
<div class="infobox-value">ENSG00000066501</div>
</div>
<div class="infobox-row">
<div class="infobox-label">UniProt ID</div>
<div class="infobox-value">[Q9Y4X5](https://www.uniprot.org/uniprot/Q9Y4X5)</div>
</div>
<div class="infobox-row">
<div class="infobox-label">Protein</div>
<div class="infobox-value">[HSPBP1-protein](/proteins/hspbp1-protein)</div>
</div>
<div class="infobox-row">
<div class="infobox-label">Associated Diseases</div>
<div class="infobox-value">[Alzheimer's Disease](/diseases/alzheimers-disease), [Parkinson's Disease](/diseases/parkinsons-disease), [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis), Cancer</div>
</div>
</div>

Function

HSPBP1 (Hsp70 Binding Protein 1), also known as FISP1 (Hsp70-interacting protein), is a co-chaperone that modulates Hsp70 family protein function. It contains a J domain and interacts with Hsp70 proteins to regulate their activity in protein quality control.

Molecular Function

HSPBP1 functions as an Hsp70 co-chaperone:

• J-domain containing protein: Activates Hsp70 ATPase activity
• Protein folding assistance: Facilitates Hsp70-mediated protein folding
• Protein quality control: Targets misfolded proteins for degradation
• Stress response: Modulates cellular stress responses
• Anti-apoptotic function: Protects cells from stress-induced death

Interaction Network

HSPBP1 interacts with:

• [HSPA1A](/genes/hspa1a), [HSPA8](/genes/hspa8), [HSPA5](/genes/hspa5) (Hsp70 family)
• [HSPA6](/genes/hspa6), [HSP90AA1](/genes/hsp90aa1) (Chaperone system)
• [DNAJA1](/genes/dnaja1), [DNAJA2](/genes/dnaja2) (Hsp40 co-chaperones)
• [BAG2](/genes/bag2) (BAG family co-chaperone)
• [AHSA1](/genes/ahsa1) (Hsp90 co-chaperone)
• [Ubiquitin-proteasome system](/cell-types/ubiquitin-proteasome-system)

Disease Associations

Alzheimer's Disease

HSPBP1 is implicated in AD pathogenesis:

• Modulates [Aβ](/proteins/amyloid-beta) clearance through Hsp70 system
• Regulates [tau protein](/proteins/tau) homeostasis
• Altered expression in AD brain
• Potential therapeutic target [1]

Parkinson's Disease

In PD, HSPBP1 contributes to neuroprotection:

• Promotes [alpha-synuclein](/proteins/alpha-synuclein) ([SNCA](/genes/snca)) clearance
• Protects dopaminergic [neurons](/entities/neurons)
• Coordinates with [autophagy](/entities/autophagy) pathway
• [LRRK2](/genes/lrrk2) pathway interaction [2]

Amyotrophic Lateral Sclerosis

In ALS:

• Helps clear [TDP-43](/mechanisms/tdp-43-proteinopathy) aggregates ([TARDBP](/genes/tardbp))
• Protects against SOD1 ([SOD1](/genes/sod1)) mutant toxicity
• Supports protein homeostasis
• May compensate for defective clearance [3]

Cancer

HSPBP1 has complex roles:

• Overexpressed in various cancers
• Promotes cell survival
• May confer stress resistance

Expression

Brain Expression

HSPBP1 is expressed in various brain regions:

• Cerebral [cortex](/brain-regions/cortex): Moderate to high expression in neurons
• [Hippocampus](/brain-regions/hippocampus): Strong expression in CA1-CA3 and dentate gyrus
• Substantia nigra: Present in dopaminergic neurons
• Cerebellum: Detected in Purkinje cells
• Glial cells: Expressed in [astrocytes](/entities/astrocytes)

Regulation

HSPBP1 expression is regulated by:

• Stress-responsive transcription factors
• Cellular stress conditions
• Developmental stage
• Disease states

Common Variants

| Variant | Type | Effect | Significance |
|---------|------|--------|--------------|
| rs2038863 | Promoter | Expression modifier | Cancer association |
| rs7255274 | 3'UTR | miRNA binding | mRNA stability |
| rs10519 | Coding | Synonymous | Functional impact |

Therapeutic Implications

Pharmacological Approaches

• Co-chaperone modulators: Enhance HSPBP1 function
• HSF1 activators: Boost heat shock response
• Hsp70/Hsp40 complex enhancers

Research Applications

• Gene therapy for neurodegeneration
• Small molecule modulators
• Combination therapies

See Also

• [HSPA1A](/genes/hspa1a) - Hsp70 member 1A
• [HSPA8](/genes/hspa8) - Hsc70
• [DNAJA1](/genes/dnaja1) - Hsp40 co-chaperone
• [BAG2](/genes/bag2) - BAG family co-chaperone
• [AHSA1](/genes/ahsa1) - Hsp90 co-chaperone
• [Protein homeostasis mechanisms](/mechanisms/protein-quality-control-network)
• [Hsp70/Hsp90 chaperone system](/mechanisms/chaperone-system)

External Links

• [NCBI Gene: HSPBP1](https://www.ncbi.nlm.nih.gov/gene/23640)
• [UniProt: HSPBP1](https://www.uniprot.org/uniprot/Q9Y4X5)
• [HGNC: HSPBP1](https://www.genenames.org/data/hgnc-data/)
• [Ensembl: HSPBP1](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000066501)

References

Pathway Diagram

The following diagram shows the key molecular relationships involving HSPBP1 discovered through SciDEX knowledge graph analysis:

Pathway Diagram

The following diagram shows the key molecular relationships involving HSPBP1 discovered through SciDEX knowledge graph analysis: