Predicted to enable cargo receptor activity. Predicted to be involved in several processes, including COPII-coated vesicle cargo loading; cell migration involved in sprouting angiogenesis; and regulation of leukocyte migration. Predicted to act upstream of or within chondrocyte development; collagen fibril organization; and positive regulation of bone mineralization. Predicted to be located in endoplasmic reticulum exit site and endoplasmic reticulum membrane. Predicted to be integral component of membrane. Orthologous to human MIA3 (MIA SH3 domain ER export factor 3). [provided by Alliance of Genome Resources, Apr 2022]