HSPA1A is a human gene whose product hSPA6** (Heat Shock Protein Family A (Hsp70) Member 6) is a member of the Hsp70 family of molecular chaperones. It functions as a molecular chaperone that assists in protein folding, refolding, and degradation. HSPA6 is induced by heat stress and other cellular stressors. 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. [1]
HSPA6 (Heat Shock Protein Family A (Hsp70) Member 6) is a member of the Hsp70 family of molecular chaperones. It functions as a molecular chaperone that assists in protein folding, refolding, and degradation. HSPA6 is induced by heat stress and other cellular stressors.
HSPA6 exhibits ATP-dependent chaperone activity:
HSPA6 interacts with:
HSPA6 is implicated in AD pathogenesis through its role in protein homeostasis:
-HSPA6 expression is altered in AD brain tissue
-The protein participates in clearance of Aβ aggregates
-It helps refold tau protein and prevent tau pathology
-Studies show HSPA6 can protect against Aβ-induced neurotoxicity [1]
HSPA6 involvement in PD includes:
-Participation in alpha-synuclein (SNCA) clearance
-Protection against dopaminergic neuron degeneration
-Association with LRRK2 (LRRK2) pathogenic variants
-Heat shock response is dysregulated in PD [2]
In ALS:
-HSPA6 may help clear TDP-43 aggregates (TARDBP)
-Protects against SOD1 (SOD1) mutant toxicity
-Heat shock response is impaired in ALS motor neurons
-Compensation by HSPA6 may be protective [3]
HSPA6 is frequently overexpressed in various cancers:
-Confers resistance to chemotherapeutic agents
-Promotes cell survival under stress
-Associated with poor prognosis in some tumor types
HSPA6 is expressed in various brain regions:
HSPA6 expression is regulated by:
| Variant | Type | Effect | Significance |
|---|---|---|---|
| rs2071499 | Promoter | Altered expression | Associated with cancer risk |
| rs2000998 | 3'UTR | miRNA binding | May affect mRNA stability |
| rs1043618 | Coding | Synonymous | Heat shock response modifier |