Predicted to enable clathrin adaptor activity. Predicted to be involved in synaptic vesicle budding from endosome. Predicted to act upstream of or within several processes, including adipose tissue development; fat cell differentiation; and visual learning. Predicted to be located in Golgi apparatus. Predicted to be part of AP-1 adaptor complex. Predicted to be active in intracellular membrane-bounded organelle. Human ortholog(s) of this gene implicated in syndromic X-linked intellectual disability 5. Orthologous to human AP1S2 (adaptor related protein complex 1 subunit sigma 2). [provided by Alliance of Genome Resources, Apr 2022]