Enables protein kinase A regulatory subunit binding activity. Involved in negative regulation of adenylate cyclase activity and response to electrical stimulus. Located in dendritic branch; neuronal cell body; and synaptic membrane. Is extrinsic component of postsynaptic density membrane. Human ortholog(s) of this gene implicated in long QT syndrome 11. Orthologous to human AKAP9 (A-kinase anchoring protein 9). [provided by Alliance of Genome Resources, Apr 2022]