Cacna1I Protein Cav3.3 T Type Calcium Channel is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
[@smad] [@transcriptional]
Overview
CACNA1I encodes the Cav3.3 protein, a T-type (low-voltage activated) calcium channel α1 subunit. This protein is a member of the voltage-gated calcium channel family and plays critical roles in neuronal excitability, thalamic oscillations, and sensory processing. Cav3.3 channels are unique among T-type channels for their widespread distribution in the brain and their involvement in various neurological disorders. [@neuroinflammation]
Cacna1I Protein Cav3.3 T Type Calcium Channel is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
[@smad] [@transcriptional]
Overview
CACNA1I encodes the Cav3.3 protein, a T-type (low-voltage activated) calcium channel α1 subunit. This protein is a member of the voltage-gated calcium channel family and plays critical roles in neuronal excitability, thalamic oscillations, and sensory processing. Cav3.3 channels are unique among T-type channels for their widespread distribution in the brain and their involvement in various neurological disorders. [@neuroinflammation]
Structure
Channel Architecture
Transmembrane domains: 10 segments arranged in 4 repeats
Voltage sensor: S4 segment in each repeat with positively charged residues
Pore region: Forms ion selectivity filter between S5 and S6
Cytoplasmic termini: N- and C-termini contain regulatory domains
Key Structural Features
Domain I: Contains the main voltage-sensing component
Domain II: Links to domain I and contributes to channel gating
Domain III: Contains key residues for channel inactivation
Domain IV: Forms the activation gate and outer pore
Splice Variants
Multiple isoforms generated by alternative splicing
N-terminal variants affect channel trafficking
C-terminal variants modulate gating properties
Normal Function
Neuronal Excitability
Generates low-threshold calcium spikes
Mediates rebound burst firing in thalamic [neurons](/entities/neurons)
Contributes to resting membrane potential regulation
The study of Cacna1I Protein Cav3.3 T Type Calcium Channel 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.