Predicted to enable SMAD binding activity and transforming growth factor beta receptor binding activity. Predicted to be involved in several processes, including autophagy; endosomal vesicle fusion; and endosome to lysosome transport. Predicted to act upstream of or within protein transport. Part of CORVET complex. Orthologous to human TGFBRAP1 (transforming growth factor beta receptor associated protein 1). [provided by Alliance of Genome Resources, Apr 2022]