Predicted to enable structural molecule activity. Predicted to be involved in Golgi vesicle transport; organelle transport along microtubule; and protein secretion. Predicted to act upstream of or within intracellular protein transport and vesicle-mediated transport. Predicted to be located in Golgi apparatus; cytoplasmic vesicle; and membrane. Predicted to be part of COPI vesicle coat. Predicted to be active in Golgi membrane; endoplasmic reticulum; and endoplasmic reticulum-Golgi intermediate compartment. Is expressed in several structures, including axis; notochord; periderm; polster; and solid lens vesicle. Orthologous to human COPG2 (COPI coat complex subunit gamma 2).