Predicted to be involved in intra-Golgi vesicle-mediated transport; intracellular protein transport; and retrograde vesicle-mediated transport, Golgi to endoplasmic reticulum. Predicted to act upstream of or within protein transport and vesicle-mediated transport. Predicted to be located in COPI-coated vesicle. Predicted to be part of COPI vesicle coat. Orthologous to human COPZ2 (COPI coat complex subunit zeta 2). [provided by Alliance of Genome Resources, Apr 2022]