inositol hexakisphosphate phosphatase activity inositol hexakisphosphate 3-phosphatase activity https://github.com/geneontology/go-ontology/issues/25949 https://github.com/geneontology/go-ontology/issues/30385 MetaCyc:RXN0-1001 GO:0016158 1-phytase activity myo-inositol-hexaphosphate 3-phosphohydrolase activity phytase activity 3-phytase activity phytate 1-phosphatase activity Reactome:R-HSA-1855225 EC:3.1.3.8 myo-inositol-hexakisphosphate 3-phosphohydrolase activity molecular_function Catalysis of the reaction: myo-inositol hexakisphosphate + H2O = D-myo-inositol 1,2,4,5,6-pentakisphosphate + phosphate. phytate 3-phosphatase activity RHEA:16989