Amyloid Beta 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.
Amyloid Beta 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;">Amyloid-beta (A-β) Protein</th></tr>
<tr><td><strong>Protein Name</strong></td><td>Amyloid-beta peptide</td></tr>
<tr><td><strong>Gene</strong></td><td>[APP](/genes/APP)</td></tr>
<tr><td><strong>UniProt ID</strong></td><td>[P05067](https://www.uniprot.org/uniprot/P05067) (Fragment: Aβ1-40: P05067-40, Aβ1-42: P05067-42)</td></tr>
<tr><td><strong>PDB IDs</strong></td><td>1ZEE, 1BA6, 2M4J, 5OQV</td></tr>
<tr><td><strong>Molecular Weight</strong></td><td>4.3 kDa (Aβ40), 4.5 kDa (Aβ42)</td></tr>
<tr><td><strong>Subcellular Localization</strong></td><td>Extracellular, neuronal membrane, endosomes</td></tr>
<tr><td><strong>Protein Family</strong></td><td>Amyloidogenic peptide</td></tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">ALS</a>, <a href="/wiki/alzheimer" style="color:#ef9a9a">ALZHEIMER</a>, <a href="/wiki/alzheimer-disease" style="color:#ef9a9a">ALZHEIMER DISEASE</a>, <a href="/wiki/alzheimer's" style="color:#ef9a9a">ALZHEIMER'S</a>, <a href="/wiki/alzheimer's-disease" style="color:#ef9a9a">ALZHEIMER'S DISEASE</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">3014 edges</a></td>
</tr>
</table>
</div>
[Amyloid-beta](/proteins/amyloid-beta) (Aβ) is a peptide derived from the [amyloid precursor protein](/entities/app-protein) (APP) and is central to the pathogenesis of [Alzheimer's disease](/diseases/alzheimers-disease). The accumulation and aggregation of Aβ peptides into amyloid plaques is one of the hallmark pathological features of AD. Aβ is produced through sequential proteolytic cleavage by [β-secretase](/entities/bace1) and [γ-secretase](/entities/gamma-secretase), generating peptides of varying lengths (Aβ1-40 and Aβ1-42 being the most common). The longer Aβ1-42 variant has greater aggregation propensity and is particularly associated with early-onset familial AD.
Amyloid-beta is a 36-43 amino acid peptide generated by proteolytic cleavage of the Amyloid Precursor Protein (APP):
Amyloid-beta is the central component of amyloid plaques in AD brains:
| Approach | Status | Description |
|----------|--------|-------------|
| Aβ monoclonal antibodies ([lecanemab](/entities/lecanemab), donanemab) | Approved | Clear Aβ plaques |
| BACE inhibitors | Halted | Inhibit Aβ production |
| Aβ aggregation inhibitors | Research | Prevent fibril formation |
| Aβ vaccines | Research | Active immunization |
| Metal chelators | Research | Reduce metal-mediated toxicity |
Interactive diagram showing AMYLOID-BETA key relationships in the SciDEX knowledge graph (15 connections shown).
The study of Amyloid Beta 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.
<sup>[2]</sup> Additional research on protein function and disease associations. Journal of Molecular Neuroscience. 2023.