Kcna1 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
The KCNA1 gene encodes a voltage-gated potassium channel critical for neuronal signaling and is associated with episodic ataxia and neuromyotonia.
| Property | Value |
|---|---|
| Gene Symbol | KCNA1 |
| Full Name | Potassium Voltage-Gated Channel Subfamily A Member 1 |
| Chromosomal Location | 12p13.32 |
| NCBI Gene ID | 3736 |
| OMIM | 176260 |
| Ensembl ID | ENSG00000111245 |
| UniProt | P09488 |
KCNA1 encodes Kv1.1, a voltage-gated potassium channel that:
Kv1.1 is crucial for proper neuronal signaling in the brain and peripheral nerves.
KCNA1 mutations cause EA1, characterized by brief episodes of ataxia and myokymia (neuromyotonia)[1].
KCNA1 is expressed in:
The study of Kcna1 Gene 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.
KCNA1 encodes the Kv1.1 alpha subunit, a voltage-gated potassium channel that belongs to the Shaker family. The channel consists of four alpha subunits, each with six transmembrane segments (S1-S6), and forms functional homomeric or heteromeric tetramers with other Kv1 family members. The S4 segment contains positively charged residues that serve as the voltage sensor, while the P-loop between S5 and S6 forms the pore selectivity filter.
Kv1.1 channels exhibit rapid activation and inactivation kinetics. The channel opens within 1-2 ms upon depolarization and can undergo either fast C-type inactivation or slow N-type inactivation depending on the subunit composition. The presence of accessory beta subunits (KChiP) dramatically slows inactivation and enhances current amplitude.
In the central nervous system, Kv1.1 is predominantly localized to:
The precise localization is regulated by interaction with anchoring proteins including PSD-93 and SAP97.
Mutations in KCNA1 cause EA1, characterized by brief attacks of ataxia and myokymia (muscle rippling). Over 30 pathogenic mutations have been identified, most affecting channel gating.
Kv1.1 dysfunction has been implicated in:
Kv1.1 channels are potential drug targets for:
Last updated: 2026-03-04