Enables protein kinase A regulatory subunit binding activity. Acts upstream of or within several processes, including actin polymerization or depolymerization; positive regulation of cAMP-dependent protein kinase activity; and positive regulation of protein kinase A signaling. Located in centrosome and sperm connecting piece. Is expressed in several structures, including alimentary system; genitourinary system; heart; nervous system; and sensory organ. Orthologous to human SPATC1L (spermatogenesis and centriole associated 1 like). [provided by Alliance of Genome Resources, Apr 2022]