Potassium channel subunit. Modulates channel activity by shifting the threshold and the half-maximal activation to more negative values. Heteromultimer with KCNB1, KCNC1 and KCNF1. Does not form homomultimers. Has to be associated with KCNB1 or possibly another partner to get inserted in the plasma membrane. Remains intracellular in the absence of KCNB1. Detected in lung, liver, kidney, pancreas, spleen, thymus, prostate, testis, ovary and colon. The segment S4 is probably the voltage-sensor and is characterized by a series of positively charged amino acids at every third position. The disease is caused by variants affecting the gene represented in this entry. Belongs to the potassium channel family. V (TC 1.A.1.2) subfamily. Kv8.2/KCNV2 sub-subfamily.