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. Located in 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]