Enables cAMP binding activity. Acts upstream of or within regulation of membrane potential. Located in membrane. Is expressed in several structures, including gut; heart; leg muscle; male reproductive gland or organ; and nervous system. Human ortholog(s) of this gene implicated in autosomal recessive limb-girdle muscular dystrophy. Orthologous to human POPDC3 (popeye domain containing 3). [provided by Alliance of Genome Resources, Apr 2022]