Predicted to enable cholecystokinin receptor activity and peptide hormone binding activity. Acts upstream of or within axonogenesis; forebrain development; and neuron migration. Predicted to be located in several cellular components, including endosome; lysosome; and terminal bouton. Predicted to be integral component of plasma membrane. Is expressed in several structures, including brain; genitourinary system; gut; and respiratory system. Human ortholog(s) of this gene implicated in obesity. Orthologous to human CCKAR (cholecystokinin A receptor). [provided by Alliance of Genome Resources, Apr 2022]