Involved in regulation of intracellular transport. Located in apical part of cell; endoplasmic reticulum membrane; and rod spherule. Is expressed in several structures, including extraembryonic component; gut; lung; retina; and urinary system. Used to study retinitis pigmentosa 77. Human ortholog(s) of this gene implicated in retinitis pigmentosa 77. Orthologous to human REEP6 (receptor accessory protein 6). [provided by Alliance of Genome Resources, Apr 2022]