Predicted to enable acid phosphatase activity; protein tyrosine phosphatase activity; and receptor tyrosine kinase binding activity. Predicted to be involved in several processes, including negative regulation of ERBB4 signaling pathway; negative regulation of cellular protein metabolic process; and regulation of neuronal synaptic plasticity. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in lysosome and postsynaptic membrane. Human ortholog(s) of this gene implicated in amelogenesis imperfecta type 1J. Orthologous to human ACP4 (acid phosphatase 4). [provided by Alliance of Genome Resources, Apr 2022]