Ppp3Ca — Protein Phosphatase 3 Catalytic Subunit Alpha is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
PPP3CA encodes the catalytic subunit A alpha of calcineurin, a calcium/calmodulin-dependent serine/threonine phosphatase. Calcineurin is highly enriched in the brain and plays critical roles in synaptic plasticity, learning, memory, and immune response regulation.
PPP3CA is located on chromosome 4q24 and encodes one of three catalytic subunits of calcineurin. The protein is expressed predominantly in the brain, particularly in regions involved in learning and memory including the hippocampus and cerebral cortex. Calcineurin is unique among phosphatases in its requirement for calcium and calmodulin for activation, making it a key mediator of calcium-dependent signaling in neurons.
| Attribute | Value |
|---|---|
| Gene Symbol | PPP3CA |
| Chromosomal Location | 4q24 |
| NCBI Gene ID | 5530 |
| Uniprot ID | P48451 |
| Aliases | CNA, CALN, CNA1, PP2BA |
| Protein Name | Calcineurin A alpha subunit |
Calcineurin is a heterodimer consisting of:
The catalytic subunit has distinct isoforms (alpha, beta, gamma) with PPP3CA being the neuronal isoform.
PPP3CA encodes the catalytic subunit A of calcineurin, a calcium/calmodulin-dependent serine/threonine phosphatase. Calcineurin is a key mediator of calcium signaling in neurons and immune cells.
Calcineurin is activated by the calcium-calmodulin complex:
Calcineurin is critically involved in AD pathophysiology:
High expression in:
Calcineurin as a therapeutic target:
| Agent | Mechanism | CNS Application |
|---|---|---|
| Cyclosporine A | Inhibits calcineurin | Neuroprotection (research) |
| FK506 | Inhibits calcineurin | Neuroprotection (research) |
| AVN-211 | Selective inhibition | In development |
PPP3CA encodes the catalytic subunit A of calcineurin, a calcium/calmodulin-dependent serine/threonine phosphatase. Calcineurin is a key mediator of calcium signaling in neurons and immune cells.
Calcineurin plays important roles in:
Calcineurin is implicated in:
Calcineurin inhibitors (cyclosporine, FK506) are widely used as immunosuppressants but have neurotoxic side effects.
The study of Ppp3Ca — Protein Phosphatase 3 Catalytic Subunit Alpha 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.