PRKACB — Protein Kinase cAMP-Activated Catalytic Subunit Beta

PRKACB — Protein Kinase cAMP-Activated Catalytic Subunit Beta

Introduction

Prkacb — Protein Kinase Camp Activated Catalytic Subunit Beta 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"> [@pka]
| Attribute | Value | [@therapeutic]
|-----------|-------| [@disease]
| Gene Symbol | PRKACB | [@clinical]
| Full Name | Protein Kinase cAMP-Activated Catalytic Subunit Beta |
| Chromosomal Location | 1p31.1 |
| NCBI Gene ID | 5567 |
| OMIM ID | 601232 |
| Ensembl ID | ENSG00000142831 |
| UniProt ID | P22694 |
| Encoded Protein | PKA Catalytic Subunit β |
| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Carney Complex |
</div>

Overview

PRKACB — Protein Kinase cAMP-Activated Catalytic Subunit Beta

Introduction

Prkacb — Protein Kinase Camp Activated Catalytic Subunit Beta 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"> [@pka]
| Attribute | Value | [@therapeutic]
|-----------|-------| [@disease]
| Gene Symbol | PRKACB | [@clinical]
| Full Name | Protein Kinase cAMP-Activated Catalytic Subunit Beta |
| Chromosomal Location | 1p31.1 |
| NCBI Gene ID | 5567 |
| OMIM ID | 601232 |
| Ensembl ID | ENSG00000142831 |
| UniProt ID | P22694 |
| Encoded Protein | PKA Catalytic Subunit β |
| Associated Diseases | Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Carney Complex |
</div>

Overview

PRKACB encodes the catalytic subunit beta of protein kinase A (PKA), a serine that mediates/threonine kinase cAMP signaling in cells. PKA is a key effector of the cAMP second messenger pathway.

Function

PKA catalytic subunit β (PKA-Cβ) catalyzes phosphate transfer:

• cAMP binds to regulatory subunits, releasing catalytic subunits
• Free catalytic subunits phosphorylate target proteins on serine/threonine residues
• Broad substrate specificity affects numerous cellular processes

• Synaptic plasticity: Phosphorylation of AMPA receptor subunits
• Gene transcription: CREB phosphorylation and activation
• Ion channel modulation: Regulation of [NMDA](/entities/nmda-receptor), AMPA, and voltage-gated channels
• Cytoskeletal dynamics: Microtubule-associated proteins
• Protein synthesis: Regulation of translation initiation factors

Disease Associations

Alzheimer's Disease

• PKA/CREB signaling is impaired in AD brains.
• [Aβ](/proteins/amyloid-beta) reduces cAMP-dependent phosphorylation.
• Memory consolidation requires PKA activity.
• Therapeutic approaches aim to restore PKA signaling.

Parkinson's Disease

• Dopamine D1 receptor signaling activates PKA.
• PKA phosphorylates DARPP-32, modulating dopaminergic signaling.
• Neuroprotective effects of PKA activation in dopaminergic [neurons](/entities/neurons).

Huntington's Disease

• Mutant [huntingtin](/proteins/huntingtin-protein) affects cAMP/PKA signaling.
• PKA phosphorylation of mutant [HTT](/genes/htt) influences toxicity.
• Altered gene transcription via CREB in HD.

Carney Complex

• PRKACB mutations cause Carney complex, a multiple neoplasia syndrome.
• Constitutive PKA activation leads to tumor formation.
• Not primarily neurodegenerative.

Expression Pattern

PRKACB shows tissue and cell-type specificity:

• High expression: Brain ([cortex](/brain-regions/cortex), [hippocampus](/brain-regions/hippocampus), cerebellum), testis
• Moderate expression: Adrenal gland, heart, skeletal muscle
• Isoforms: Three splice variants (β1, β2, β3) with different expression patterns

Key Publications

See Also

• [cAMP/PKA Signaling](/mechanisms/camp-signaling)
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [PRKACB Protein](/proteins/prkacb-protein)
• [CREB Transcription Factor](/entities/creb)

External Links

• [NCBI Gene: PRKACB](https://www.ncbi.nlm.nih.gov/gene/5567)
• [UniProt: P22694](https://www.uniprot.org/uniprot/P22694)
• [OMIM: 601232](https://www.omim.org/entry/601232)

Background

The study of Prkacb — Protein Kinase Camp Activated Catalytic Subunit Beta 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.

Brain Atlas Resources

• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
• [Allen Human Brain Atlas - PRKACB Expression](https://human.brain-map.org/microarray/search/show?search_term=PRKACB): Gene expression data

Brain Atlas Resources

• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data
• [Allen Human Brain Atlas - PRKACB Expression](https://human.brain-map.org/microarray/search/show?search_term=PRKACB): Gene expression data

References

Pathway Diagram

The following diagram shows the key molecular relationships involving PRKACB — Protein Kinase cAMP-Activated Catalytic Subunit Beta discovered through SciDEX knowledge graph analysis: