Enables calcium-dependent protein serine/threonine phosphatase activity; chromatin binding activity; and protein phosphatase regulator activity. Acts upstream of or within negative regulation of G1/S transition of mitotic cell cycle; negative regulation of cell population proliferation; and protein dephosphorylation. Part of protein phosphatase type 2A complex. Is expressed in several structures, including genitourinary system; heart; liver; lung; and spleen. Orthologous to human PPP2R3B (protein phosphatase 2 regulatory subunit B''beta). [provided by Alliance of Genome Resources, Apr 2022]