The function of Ensembl gene identifier ENSG00000072954 (TMEM38A, transmembrane protein 38A) is as follows. Intracellular monovalent cation channel required for maintenance of rapid intracellular calcium release. Acts as a potassium counter-ion channel that functions in synchronization with calcium release from intracellular stores (By similarity). Opened by a change of voltage within the sarcoplasmic reticulum lumen (By similarity). .