Predicted to be involved in vesicle-mediated transport. Predicted to be part of AP-4 adaptor complex. Predicted to be active in intracellular membrane-bounded organelle. Human ortholog(s) of this gene implicated in hereditary spastic paraplegia 52. Orthologous to human AP4S1 (adaptor related protein complex 4 subunit sigma 1). [provided by Alliance of Genome Resources, Apr 2022]