| Alpha-Catenin Protein | |
|---|---|
| Gene | [CTNNA1](/genes/ctnna1) |
| UniProt | P35221 |
| PDB | 4IGG, 1L7W |
| Mol. Weight | 100 kDa |
| Localization | Cell junctions, cytoplasm |
| Family | Alpha-catenin family, Vinculin family |
| Diseases | [Alzheimer's Disease](/diseases/alzheimers), [Parkinson's Disease](/diseases/parkinsons-disease), [Cancer](/diseases/cancer) |
Alpha Catenin 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.
Alpha-catenin is a crucial component of the cadherin-catenin complex that mediates cell-cell adhesion and links the adhesion complex to the actin cytoskeleton[1]. In neurons, alpha-catenin plays important roles in synaptic formation, plasticity, and neuronal connectivity[2].
The CTNNA1 gene encodes the prototypical alpha-catenin protein, one of three alpha-catenin family members (alpha-N-catenin is neuron-specific). Alpha-catenin is ubiquitously expressed and is essential for embryonic development[3].
Alpha-catenin contains multiple functional domains:
The N-terminal region (residues 1-380) contains:
The central region forms the mechanical linkage:
The C-terminal region directly binds to:
Alpha-catenin links the cadherin-beta-catenin complex to the actin cytoskeleton:
At neuronal synapses, alpha-catenin:
Alpha-catenin acts as a mechanosensor:
Alpha-catenin is implicated in AD pathogenesis:
In dopaminergic neurons:
Loss of alpha-catenin expression is common in:
Therapeutic approaches include:
The study of Alpha Catenin 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.
Rimm et al. [Alpha-catenin structure (1995)](https://doi.org/10.1016/0092-8674(95). 1995. ↩︎
Abe et al. Alpha-catenin in synaptic plasticity (2008). 2008. ↩︎
Kosik et al. Catenins in neuronal function (2017). 2017. ↩︎
Hu et al. Alpha-catenin in neurodegeneration (2019). 2019. ↩︎