Voltage-Dependent Sodium Channel Protein (Neuronal) (VGSC)

Voltage-dependent sodium channels (VGSCs) are integral membrane proteins essential for the initiation and propagation of action potentials in neurons. They mediate rapid sodium influx upon membrane depolarization, crucial for neuronal excitability and communication. The alpha subunit forms the ion-conducting pore, with S4 segments acting as voltage sensors and P-loops determining ion selectivity. The DIII-IV linker functions as an inactivation gate. Dysfunction or mutations in VGSCs are linked to neurological disorders like epilepsy and neuropathic pain. Pharmacological agents targeting VGSCs include local anesthetics and anticonvulsants.

Other names

Voltage-gated sodium channelNaV channel

Modulation of channel activity by binding within or near pore regions or voltage-sensing domains, affecting channel gating and ion conductance.