Hspb1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
HSPB1 (Heat Shock Protein Family B Member 1), also known as Hsp27 or HSP27, is a small heat shock protein that plays crucial roles in protein quality control, cell survival, and neuroprotection. It is encoded by the HSPB1 gene located on chromosome 7q11.23.
| Attribute |
Value |
| Gene Symbol |
HSPB1 |
| Full Name |
Heat Shock Protein Family B Member 1 |
| Chromosomal Location |
7q11.23 |
| NCBI Gene ID |
3315 |
| Ensembl ID |
ENSG00000178447 |
| UniProt ID |
P04792 |
| OMIM |
602195 |
HSPB1 encodes a 205-amino acid protein with a molecular weight of approximately 27 kDa. The protein contains:
- N-terminal WDPF domain (variable domain)
- Central α-crystallin domain (~90 residues)
- C-terminal tail (hydrophilic)
HSPB1/Hsp27 functions as a molecular chaperone that:
- Prevents protein aggregation under stress conditions
- Inhibits caspase activation and apoptosis
- Modulates cytoskeletal dynamics
- Regulates translation initiation
- Protects against oxidative stress
- HSPB1 mutations cause a rare form of autosomal dominant ALS
- Reduced chaperone activity leads to increased TDP-43 aggregation
- Hsp27 levels are decreased in sporadic ALS spinal cord
- Therapeutic target: Hsp27 overexpression protects motor neurons
- Hsp27 colocalizes with amyloid plaques and neurofibrillary tangles
- Protects against Aβ-induced neurotoxicity
- Expression is upregulated in AD brain as a compensatory response
- Protects against α-synuclein toxicity
- Levels are altered in PD substantia nigra
- May protect dopaminergic neurons from oxidative stress
- HSPB1 mutations cause axonal CMT2 (CMT2F)
- Affects neurofilament assembly and axonal transport
HSPB1 is expressed in:
- Motor neurons and sensory neurons
- Hippocampal neurons
- Astrocytes and microglia
- Peripheral nervous system
| Approach |
Status |
Description |
| Recombinant Hsp27 |
Preclinical |
Protein therapy for ALS |
| Small molecule activators |
Research |
Increase Hsp27 expression |
| Gene therapy |
Research |
AAV-mediated HSPB1 delivery |
- [1] Anatomopathology of a case of amyotrophic lateral sclerosis with HSPB1 mutation. Neurology 2008.
- [2] Small heat shock proteins in neurodegenerative diseases. Cell Stress Chaperones 2020.
- [3] HSPB1 mutations causing ALS. Brain 2012.
- [4] Hsp27 protects against beta-amyloid neurotoxicity. J Neurosci 2005.
- [5] Regulation of neuronal survival by Hsp27. EMBO J 2001.
The study of Hspb1 Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.