Catalytic activity:A phosphoprotein + H (2) O = a protein + phosphate. ,Catalytic activity:Protein tyrosine phosphate + H (2) O = protein tyrosine + phosphate. ,Function:Protein phosphatase which may play a role in the regulation of actin filament dynamics. Can dephosphorylate and activate the actin binding/depolymerizing factor cofilin , which subsequently binds to actin filaments and stimulates their disassembly. ,miscellaneous:Tyrosine phosphatase activity has not been demonstrated for this protein to date. ,PTM:Phosphorylated upon DNA damage , probably by ATM or ATR. ,similarity:Belongs to the protein-tyrosine phosphatase family. ,similarity:Contains 1 tyrosine-protein phosphatase domain. ,subunit:Does not bind to , or colocalize with , filamentous actin. ,
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