Predicted to enable type 1 neuromedin U receptor binding activity and type 2 neuromedin U receptor binding activity. Involved in several processes, including energy homeostasis; regulation of grooming behavior; and temperature homeostasis. Predicted to be located in extracellular region. Predicted to be active in terminal bouton. Is expressed in spinal cord; stomach; and testis. Human ortholog(s) of this gene implicated in obesity. Orthologous to human NMU (neuromedin U). [provided by Alliance of Genome Resources, Apr 2022]