Predicted to enable phosphatidylinositol-3,4-bisphosphate 4-phosphatase activity. Predicted to act upstream of or within polyphosphate catabolic process. Located in postsynaptic density. Is expressed in several structures, including cranium; eye; integumental system; nervous system; and urinary system. Orthologous to human INPP4A (inositol polyphosphate-4-phosphatase type I A). [provided by Alliance of Genome Resources, Apr 2022]