Enables identical protein binding activity. Involved in several processes, including establishment of endothelial barrier; negative regulation of cAMP-mediated signaling; and response to hydrogen sulfide. Located in several cellular components, including hippocampal mossy fiber; membrane raft; and mitochondrion. Biomarker of cardiomyopathy. Orthologous to human PDE2A (phosphodiesterase 2A). [provided by Alliance of Genome Resources, Apr 2022]