Enables protein serine/threonine phosphatase activity. Involved in histone dephosphorylation and positive regulation of cysteine-type endopeptidase activity involved in apoptotic process. Located in cytosol and perinuclear region of cytoplasm. Orthologous to human PPM1F (protein phosphatase, Mg2+/Mn2+ dependent 1F). [provided by Alliance of Genome Resources, Apr 2022]