Potassium sodium-activated channel subfamily T member 2 (KCNT2)

Potassium sodium-activated channel subfamily T member 2 (KCNT2) is an ion channel protein expressed primarily in neurons, where it forms sodium- and chloride-activated potassium channels responsible for rapidly activating outward potassium currents[1][5][6]. KCNT2 channels (sometimes known as SLICK, Slo2.1, or KNa1.2) play a critical role in regulating neuronal excitability, firing thresholds, and action potential properties by facilitating K⁺ efflux in response to increases in intracellular sodium and chloride[1][3][6]. The KCNT2 gene is associated with developmental and epileptic encephalopathy (DEE57). Alterations in its function can lead to neurological diseases such as epilepsy, as KCNT2 activity contributes to normal neuronal signaling and auditory function[1][2][4]. The channel is a member of the Slo2 subfamily of potassium channels, distinct for their dual regulation by sodium and chloride ions, and is more widely distributed in the nervous system than some other Slo2 channels[3][4].

Other names

SLICKSlo2.1KCa4.2KNa1.2Sodium and chloride-activated ATP-sensitive potassium channel Slo2.1Potassium channel, subfamily T, member 2Sequence like an intermediate conductance potassium channel subunitDEE57EIEE57Sodium and chloride-activated ATP-sensitive potassium channelSodium-and chloride-activated ATP-sensitive potassium channel (SLICK)Potassium channel, sodium-activated subfamily T, member 2

Channel blockers: block potassium efflux, increasing neuronal excitability[3]. Channel activators: increase K⁺ efflux, dampening excitability[3]. Modulation by intracellular sodium and chloride concentration.