Acts upstream of or within positive regulation of endoplasmic reticulum stress-induced intrinsic apoptotic signaling pathway. Located in Golgi apparatus and plasma membrane. Is expressed in several structures, including adrenal medulla; craniocervical region bone; ganglia; liver lobe; and thymus primordium. Orthologous to human SERINC3 (serine incorporator 3). [provided by Alliance of Genome Resources, Apr 2022]