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Voltage-Gated Channel

Molecular classification: Ion channel, Transmembrane protein

Overview

Voltage-gated channels are transmembrane proteins that form ion channels activated by changes in the electrical membrane potential. They are crucial for action potential initiation and propagation in excitable tissues. The core structure includes a voltage sensor, pore/conducting pathway, and gate. Major types include voltage-gated sodium, potassium, and calcium channels. Dysregulation can lead to various diseases, making them important drug targets.

Mechanism of action

Blockage of ion flow through the channel pore, modulation of channel gating kinetics, or alteration of voltage sensitivity.

Biological functions

Action potential initiationAction potential propagationSignal propagationExcitabilityResting membrane potential maintenanceCell volume regulationNeurotransmitter releaseMuscle contraction

Disease associations

Neurological disordersCardiovascular diseaseEpilepsyPain

Safety considerations

Subtype selectivity challenges leading to off-target effectsPotential for serious side effects due to widespread expression

Interacting drugs

Local anesthetics

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