Voltage-gated potassium channel subfamily C member (Kv3) (Kv3)

Voltage-gated potassium channel subfamily C member (Kv3) refers to a family of ion channels crucial for fast and efficient repolarization of action potentials, allowing certain central neurons to sustain high-frequency firing. Kv3 channels are tetrameric transmembrane proteins, each subunit comprising six transmembrane helices (S1–S6); S1–S4 form the voltage-sensing domain (with S4 as the main voltage sensor), and S5–S6 constitute the potassium-selective pore domain[1][2][3][5][7][9]. The cytoplasmic T1 domain controls tetramerization and gating, with unique structural features differentiating Kv3 channels from other potassium channels[1][9][10]. Kv3 channel dysfunction via genetic mutations leads to impaired neuronal excitability, contributing to neuropsychiatric and neurodegenerative diseases, highlighting their potential as promising drug targets for CNS disorders[2][5][4][7][10].

Other names

Kv3 potassium channelVoltage-gated potassium channel subfamily C (Kv3)Kv3.1, Kv3.2, Kv3.3, Kv3.4 (individual isoforms)KCNC1, KCNC2, KCNC3, KCNC4 (gene names)High voltage-activated potassium channels

Channel inhibition/blockade (e.g., TEA, 4-AP) reduces potassium conductance. Positive modulation (e.g., Lu AG00563) enhances channel activity, increases potassium flux for improved neuronal repolarization. Generally, drugs can enhance or suppress channel opening in response to voltage.