Enables 3',5'-cyclic-nucleotide phosphodiesterase activity and cGMP binding activity. Involved in positive regulation of MAP kinase activity; regulation of muscle system process; and relaxation of cardiac muscle. Acts upstream of or within several processes, including cGMP catabolic process; negative regulation of T cell proliferation; and positive regulation of oocyte development. Predicted to be located in cytosol. Is expressed in several structures, including alimentary system; brain; genitourinary system; respiratory system; and sensory organ. Human ortholog(s) of this gene implicated in IgA glomerulonephritis. Orthologous to human PDE5A (phosphodiesterase 5A). [provided by Alliance of Genome Resources, Apr 2022]