Beta-Actin Protein

Beta-Actin Protein

Overview

Beta Actin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

Beta Actin Protein 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-protein">
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Beta-Actin Protein</th></tr>
<tr><td><strong>Protein Name</strong></td><td>Beta-Actin</td></tr>
<tr><td><strong>Gene</strong></td><td>[ACTB](/genes/actb)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P60709](https://www.uniprot.org/uniprot/P60709)</td></tr>
<tr><td><strong>PDB Structures</strong></td><td>1J6Z, 2BT0, 3MFF</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>42 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Cytoplasm, Cytoskeleton, Nucleus</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Actin family</td></tr>
</table>
</div>

Structure

...

Beta-Actin Protein

Overview

Beta Actin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Introduction

Beta Actin Protein 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-protein">
<table>
<tr><th colspan="2" style="background:#e8f4f8; text-align:center; font-size:1.1em;">Beta-Actin Protein</th></tr>
<tr><td><strong>Protein Name</strong></td><td>Beta-Actin</td></tr>
<tr><td><strong>Gene</strong></td><td>[ACTB](/genes/actb)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P60709](https://www.uniprot.org/uniprot/P60709)</td></tr>
<tr><td><strong>PDB Structures</strong></td><td>1J6Z, 2BT0, 3MFF</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>42 kDa</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Cytoplasm, Cytoskeleton, Nucleus</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Actin family</td></tr>
</table>
</div>

Structure

Beta-actin is a 375 amino acid globular protein that binds ATP. It consists of four subdomains (SD1-SD4) that undergo conformational changes during the ATP hydrolysis cycle. The protein forms F-actin filaments through polymerization, with each monomer binding one ATP. Actin filaments are polarized with plus (barbed) and minus (pointed) ends. Beta-actin contains binding sites for over 100 actin-binding proteins that regulate its dynamics.

Normal Function

Beta-actin is a fundamental cytoskeletal protein essential for:

• Cell structure and shape: Forms microfilaments providing mechanical support
• Cell motility: Powers lamellipodia and filopodia formation
• Cytokinesis: Forms contractile ring during cell division
• Intracellular transport: Serves as tracks for myosin-based transport
• Synaptic function: Regulates dendritic spine morphology and synaptic plasticity
• Gene transcription: Participates in chromatin remodeling complexes

In [neurons](/entities/neurons), beta-actin localizes to [dendritic spines](/mechanisms/dendritic-spines) where it regulates spine morphology, size, and stability. Activity-dependent actin polymerization in spines is essential for [long-term potentiation](/mechanisms/long-term-potentiation) (LTP) and memory formation.

Role in Disease

Dysregulation of beta-actin contributes to neurodegenerative diseases:

• Alzheimer's Disease: Reduced spine actin dynamics, impaired LTP, memory deficits
• Parkinson's Disease: Axonal transport defects, dopaminergic neuron dysfunction
• Amyotrophic Lateral Sclerosis (ALS): Cytoskeletal instability, axonal degeneration
• Baraitser-Winter Syndrome: Developmental brain malformations due to actin mutations
• Intellectual Disability: Impaired synaptic plasticity

Therapeutic Targeting

• Actin-stabilizing compounds: Enhance spine stability
• Myosin inhibitors: Modulate actin-myosin dynamics
• Actin-binding protein modulators: Target specific regulatory pathways

Key Publications

[11318614](https://pubmed.ncbi.nlm.nih.gov/11318614/): Actin structure and function. Nat Rev Neurosci, 2001.

[17115040](https://pubmed.ncbi.nlm.nih.gov/17115040/): Actin in dendritic spines. Neuron, 2006.

[18986163](https://pubmed.ncbi.nlm.nih.gov/18986163/): Beta-actin in synaptic plasticity. Nat Neurosci, 2008.

[21636303](https://pubmed.ncbi.nlm.nih.gov/21636303/): Cytoskeletal defects in AD. Nat Rev Neurosci, 2011.

[25943886](https://pubmed.ncbi.nlm.nih.gov/25943886/): Actin dynamics in neurodegeneration. Trends Neurosci, 2015.

See Also

• [ACTB Gene](/genes/actb)
• [Gamma-Actin Protein](/proteins/gamma-actin-protein)
• [Actin Cytoskeleton](/mechanisms/actin-cytoskeleton)
• [Synaptic Plasticity](/mechanisms/synaptic-plasticity)
• [Alzheimer's Disease](/diseases/alzheimers-disease)

Overview

Beta Actin Protein plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.

Background

The study of Beta Actin Protein 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.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References

<references>

• Pollard TD, et al. (2001). Structure and function of actin. Nat Rev Neurosci 2: 138-145.
• Hotulainen P, et al. (2009). Actin in dendritic spine morphology. Neuron 61: 337-350.
• Penzes P, et al. (2011). Dendritic spine pathology in AD. Nat Rev Neurosci 12: 453-460.

</references>