Predicted to enable potassium channel activity. Acts upstream of or within several processes, including cellular response to caffeine; lung development; and regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion. Located in endoplasmic reticulum. Human ortholog(s) of this gene implicated in osteogenesis imperfecta type 14. Orthologous to human TMEM38B (transmembrane protein 38B). [provided by Alliance of Genome Resources, Apr 2022]