Predicted to be involved in Golgi localization; endoplasmic reticulum to Golgi vesicle-mediated transport; and retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum. Predicted to act upstream of or within several processes, including Golgi vesicle transport; adult locomotory behavior; and cerebellar Purkinje cell layer maturation. Predicted to be located in COPI-coated vesicle; Golgi apparatus; and endoplasmic reticulum. Predicted to be part of COPI vesicle coat. Orthologous to human ARCN1 (archain 1). [provided by Alliance of Genome Resources, Apr 2022]