Enables calmodulin binding activity. Predicted to be involved in positive regulation of long-term synaptic potentiation and postsynaptic modulation of chemical synaptic transmission. Predicted to act upstream of or within intracellular signal transduction. Predicted to be located in several cellular components, including dendritic spine head; postsynaptic density; and trans-Golgi network transport vesicle membrane. Is expressed in several structures, including brain; genitourinary system; hemolymphoid system gland; liver; and stomach. Orthologous to human NRGN (neurogranin). [provided by Alliance of Genome Resources, Apr 2022]