Hspb5 — Heat Shock Protein Beta 5 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<div class="infobox infobox-gene"> [@iwaki2021] <span class="infobox-title">HSPB5 Gene</span> [@arrigo2020] | Property | Value | [@veena2018] |----------|-------| | Gene Symbol | HSPB5 | | Full Name | Heat Shock Protein Family B (Small) Member 5 (Alpha B-Crystallin) | | Chromosomal Location | 11q23.1 | | NCBI Gene ID | 9369 | | OMIM ID | 123610 | | Ensembl ID | ENSG00000120063 | | UniProt ID | P02511 | | Associated Diseases | Alexander Disease, Retinitis Pigmentosa, Cataract, Myopathy | </div>
Overview
HSPB5 (Heat Shock Protein Family B Member 5), also known as alpha B-crystallin (CRYAB), is a small heat shock protein with molecular chaperone activity. It was originally identified as a major lens protein (crystallin) and is now recognized as an important cytoskeletal protector in multiple tissues, including the heart, skeletal muscle, and brain. Mutations in HSPB5 cause Alexander disease, and the protein is implicated in various neurodegenerative conditions due to its anti-aggregation and protective functions.
Normal Function
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HSPB5 Gene
Introduction
Hspb5 — Heat Shock Protein Beta 5 is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
<div class="infobox infobox-gene"> [@iwaki2021] <span class="infobox-title">HSPB5 Gene</span> [@arrigo2020] | Property | Value | [@veena2018] |----------|-------| | Gene Symbol | HSPB5 | | Full Name | Heat Shock Protein Family B (Small) Member 5 (Alpha B-Crystallin) | | Chromosomal Location | 11q23.1 | | NCBI Gene ID | 9369 | | OMIM ID | 123610 | | Ensembl ID | ENSG00000120063 | | UniProt ID | P02511 | | Associated Diseases | Alexander Disease, Retinitis Pigmentosa, Cataract, Myopathy | </div>
Overview
HSPB5 (Heat Shock Protein Family B Member 5), also known as alpha B-crystallin (CRYAB), is a small heat shock protein with molecular chaperone activity. It was originally identified as a major lens protein (crystallin) and is now recognized as an important cytoskeletal protector in multiple tissues, including the heart, skeletal muscle, and brain. Mutations in HSPB5 cause Alexander disease, and the protein is implicated in various neurodegenerative conditions due to its anti-aggregation and protective functions.
Normal Function
HSPB5 functions as:
Molecular chaperone: Prevents protein aggregation under stress
The HSPB5 gene is located on chromosome 11q23.1 and encodes a 175-amino acid protein. The gene contains three exons and is highly conserved across species.
Protein Structure
HSPB5 contains:
N-terminal domain: Variable region with phosphorylation sites
Alpha-crystallin domain: ~90 aa conserved region (aa 60-150)
C-terminal extension: Hydrophilic tail for solubility
Oligomerization interface: Forms large multimeric complexes
Disease Associations
Alexander Disease
HSPB5 mutations cause Alexander disease:
Gain of toxicity: Mutant protein forms Rosenthal fibers
The study of Hspb5 — Heat Shock Protein Beta 5 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.
References
Goldstein LE, et al, "Alpha-crystallin in age-related disease." Exp Eye Res 2022 (2022)
Iwaki T, et al, "Alexander disease and HSPB5 mutations." Brain Dev 2021 (2021)
Arrigo AP, et al, "Small heat shock proteins in stress response." Cell Stress Chaperones 2020 (2020)
Veena S, et al, "Alpha B-crystallin as therapeutic target." J Mol Neurosci 2018 (2018)