Enables magnesium ion binding activity; protein homodimerization activity; and pyridoxal phosphatase activity. Involved in dephosphorylation and pyridoxal phosphate catabolic process. Located in cell-cell junction. Is expressed in alimentary system; eye; limb; nervous system; and tail. Orthologous to human PDXP (pyridoxal phosphatase). [provided by Alliance of Genome Resources, Apr 2022]