Involved in negative regulation of osteoclast differentiation and regulation of cytosolic calcium ion concentration. Located in endoplasmic reticulum membrane. Is expressed in cerebral cortex marginal layer; midbrain mantle layer; rest of cerebellum mantle layer; rest of cerebellum marginal layer; and ventral grey horn. Orthologous to human TMEM178A (transmembrane protein 178A). [provided by Alliance of Genome Resources, Apr 2022]