phosphoprotein phosphatase activity hydrolase activity, acting on phosphorus-nitrogen bonds protein histidine phosphatase activity https://github.com/geneontology/go-ontology/issues/21517 https://github.com/geneontology/go-ontology/issues/30193 Catalysis of the reaction: protein histidine phosphate + H2O = protein histidine + phosphate. GO:0101006 This eukaryotic enzyme dephosphorylates phosphorylated histidine residues within proteins and peptides. The enzyme acts on phosphate groups attached to both the pros- (RHEA:47964) and tele- (RHEA:47960) nitrogen atoms, but the pros- position is somewhat preferred (by a factor of two at the most) (EC:3.9.1.3). RHEA:47960 molecular_function RHEA:47964 GO:0008969 EC:3.9.1.3 phosphohistidine phosphatase activity