The KCNC4 gene encodes an integral membrane protein that functions as a voltage-gated potassium channel. Such channels react to a voltage difference across membranes and selectively allow potassium ions to permeate through. KCNC4 belongs to the delayed rectifier class of channel proteins that permit nerve cells to efficiently repolarize following an action potential. By carrying out its function the protein helps not only in potassium ion transport and chemical synaptic transmission but also neurotransmitter secretion and protein homooligomerization.