Predicted to enable structural molecule activity. Predicted to be involved in COPII-coated vesicle cargo loading; endoplasmic reticulum organization; and intracellular protein transport. Predicted to act upstream of or within protein transport and vesicle-mediated transport. Predicted to be located in cytoplasmic vesicle; endoplasmic reticulum; and membrane. Predicted to be part of COPII vesicle coat. Predicted to be active in endoplasmic reticulum exit site. Orthologous to human SEC31B (SEC31 homolog B, COPII coat complex component). [provided by Alliance of Genome Resources, Apr 2022]