Enables protein serine/threonine phosphatase activity. Involved in circadian regulation of gene expression; entrainment of circadian clock by photoperiod; and protein dephosphorylation. Located in cytoplasm. Is expressed in cornea; lens epithelium; lens fiber; limb; and retina. Human ortholog(s) of this gene implicated in Noonan syndrome-like disorder with loose anagen hair 2. Orthologous to human PPP1CB (protein phosphatase 1 catalytic subunit beta). [provided by Alliance of Genome Resources, Apr 2022]