Metallo-phosphoesterase involved in phosphate metabolism. Has a peroxidase activity. a phosphate monoester + H2O = an alcohol + phosphate 2 a phenolic donor + H2O2 = 2 a phenolic radical donor + 2 H2O Binds 1 Fe cation per subunit. Binds 1 zinc ion per subunit. Inhibited by phosphate and molybdate. Homodimer. Expressed in roots, stems, leaves, flowers and siliques. By phosphate starvation, during senescence, by ABA, by H(2)O(2), and by salt stress. Belongs to the metallophosphoesterase superfamily. Purple acid phosphatase family.