Predicted to enable voltage-gated ion channel activity. Acts upstream of or within intrinsic apoptotic signaling pathway in response to DNA damage by p53 class mediator. Predicted to be located in endoplasmic reticulum and nuclear membrane. Is expressed in central nervous system; early conceptus; retina; and secondary oocyte. Orthologous to human TMEM109 (transmembrane protein 109). [provided by Alliance of Genome Resources, Apr 2022]