Voltage-gated chloride channel (ClC (commonly used for specific family members, e.g., ClC-1, ClC-2))

Voltage-gated chloride channels are a family of transmembrane ion channels primarily responsible for the voltage-dependent, selective passage of chloride ions across cellular membranes. These channels are essential for controlling electrical excitability in neurons and muscle fibers, maintaining resting membrane potential, regulating cell volume, and participating in pH and ion homeostasis. The ClC channels are the best-characterized family, composed of homodimers where each subunit forms an independent pore, enabling the conduction of Cl^-^ and sometimes other anions. The gating of these channels depends on membrane voltage, extracellular anion concentration, and in some family members, additional factors such as pH. Dysfunction in voltage-gated chloride channels can cause various genetic diseases, most notably myotonia congenita (via ClC-1) and epilepsy (via ClC-2). Pharmacologically, a few small molecule inhibitors such as AK-42 exhibit subtype selectivity, providing research tools and potential therapeutic avenues, though clinical use is currently limited due to safety and selectivity challenges[2][3][5][6].

Other names

ClC channelvoltage-dependent chloride channelCLCN family (e.g., CLCN1, CLCN2)

Channel blockade (inhibitors prevent Cl^-^ current and modulate excitability)\nModulation of gating (some compounds alter voltage- or ligand-dependent transitions)\nStabilization of open or closed channel conformations[3][4][5]