Cacnb1 Protein Calcium Channel Beta 1 Subunit is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
CACNB1 (Calcium Channel Beta-1 Subunit) is the beta-1 auxiliary subunit of voltage-gated calcium channels (VGCCs). This protein plays a critical role in modulating the trafficking, gating, and functional expression of calcium channel complexes in various tissues including the brain and heart.
| Property |
Value |
| Protein Name |
Voltage-gated calcium channel subunit beta-1 |
| Gene Symbol |
CACNB1 |
| UniProt ID |
Q14816 |
| Molecular Weight |
~65 kDa |
| Protein Length |
597 amino acids |
| Chromosomal Location |
17q22 |
The CACNB1 protein contains several functional domains:
- SH3 Domain (Src Homology 3): N-terminal domain involved in protein-protein interactions
- SH2 Domain (Src Homology 2): Mediates binding to phosphorylated tyrosine residues
- GK Domain (Guanylate Kinase): Central domain with binding activity
- AID (Alpha-Interacting Domain): Critical for binding to the alpha-1 subunit of VGCCs
- Facilitates proper trafficking of calcium channel alpha-1 subunits to the plasma membrane
- Increases the density of functional channels at the cell surface
- Modifies voltage-dependent activation and inactivation kinetics
- Binds to multiple alpha-1 subunits (Cav1.2, Cav1.3, Cav2.1, Cav2.2)
- Interacts with scaffolding proteins in the postsynaptic density
- Associates with other auxiliary subunits
- Reduced expression in AD brain correlates with cognitive decline
- Calcium dysregulation through beta subunit dysfunction
- Contributes to synaptic plasticity impairment
- Altered expression in dopaminergic neurons
- May affect neuronal calcium homeostasis
- LRRK2 interactions with calcium signaling
- Mutations can cause epileptic phenotypes
- Alters neuronal excitability through calcium current modulation
- Beta-1 subunits in cardiac muscle calcium channels
- Important for cardiac contractility
- Potential antiarrhythmic targets
| Strategy |
Agent |
Status |
| Calcium Channel Blockers |
Various |
Approved |
| Beta Subunit Modulators |
- |
Research |
| Gene Therapy |
AAV vectors |
Experimental |
- Development of subunit-selective modulators
- Understanding isoform-specific functions
- Gene therapy approaches for channelopathies
The study of Cacnb1 Protein Calcium Channel Beta 1 Subunit 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.
- Aiba I, et al. (2010). Molecular mechanisms of VGCC beta subunit function. Channels (Austin). 4(6):465-473.
- Dolphin AC (2013). Calcium channel auxiliary alpha2delta and beta subunits: trafficking and function. Cold Spring Harb Perspect Biol. 5(8):a11335.
- Chen RS, et al. (2007). Calcium channel mutations in neurological disorders. Adv Neurol. 103:245-260.