Predicted to enable R-SMAD binding activity. Predicted to be involved in negative regulation of cell migration; negative regulation of epithelial to mesenchymal transition; and negative regulation of transmembrane receptor protein serine/threonine kinase signaling pathway. Predicted to be located in intracellular membrane-bounded organelle. Predicted to be active in Golgi membrane and early endosome membrane. Orthologous to human LDLRAD4 (low density lipoprotein receptor class A domain containing 4). [provided by Alliance of Genome Resources, Apr 2022]