KCNMA1 (Potassium Calcium-Activated Channel Subfamily M Alpha 1) is a Protein Coding gene. MaxiK channels are large conductance, voltage and calcium-sensitive potassium channels which are fundamental to the control of smooth muscle tone and neuronal excitability. Diseases associated with KCNMA1 include Paroxysmal Nonkinesigenic Dyskinesia, 3, With Or Without Generalized Epilepsy and Liang-Wang Syndrome.