Predicted to enable structural molecule activity. Predicted to be involved in Golgi vesicle transport and intracellular protein transport. Predicted to act upstream of or within protein transport and vesicle-mediated transport. Predicted to be located in COPI-coated vesicle membrane and Golgi membrane. Predicted to be part of COPI vesicle coat. Human ortholog(s) of this gene implicated in primary autosomal recessive microcephaly 19. Orthologous to human COPB2 (COPI coat complex subunit beta 2).