Enables identical protein binding activity and protein N-terminus binding activity. Involved in several processes, including amino acid import across plasma membrane; regulation of ion transport; and regulation of nervous system process. Located in several cellular components, including dendrite; perikaryon; and symmetric synapse. Human ortholog(s) of this gene implicated in schizophrenia. Orthologous to human NTSR1 (neurotensin receptor 1). [provided by Alliance of Genome Resources, Apr 2022]