Ancillary protein that assembles as a beta subunit with a voltage-gated potassium channel complex of pore-forming alpha subunits. Modulates the gating kinetics and enhances stability of the channel complex. Associated with KCNC4/Kv3.4 is proposed to form the subthreshold voltage-gated potassium channel in skeletal muscle and to establish the resting membrane potential (RMP) in muscle cells. Associated with KCNQ1/KCLQT1 may form the intestinal cAMP-stimulated potassium channel involved in chloride secretion.
cardiac voltage-gated potassium channel accessory subunit; Minimum potassium ion channel-related peptide 2; MinK-related peptide 2; MiRP2; Potassium channel subunit beta MiRP2; potassium channel, voltage gated subfamily E regulatory beta subunit 3; Potassium voltage-gated channel subfamily E member 3; potassium voltage-gated channel, Isk-related family, member 3; potassium voltage-gated channel, Isk-related subfamily, gene 3; potassium voltage-gated channel, Isk-related subfamily, member 3; voltage-gated K+ channel subunit MIRP2