Predicted to enable small GTPase binding activity. Involved in anterograde synaptic vesicle transport. Predicted to be located in Golgi apparatus and membrane. Predicted to be part of clathrin adaptor complex. Predicted to be active in cytoplasmic vesicle. Orthologous to human AP3M1 (adaptor related protein complex 3 subunit mu 1). [provided by Alliance of Genome Resources, Apr 2022]