Enables signaling receptor binding activity. Predicted to be involved in several processes, including neuropeptide signaling pathway; positive regulation of calcium ion transport; and positive regulation of cytosolic calcium ion concentration. Predicted to act upstream of or within G protein-coupled receptor signaling pathway. Located in ciliary membrane and non-motile cilium. Is expressed in brain and lung. Human ortholog(s) of this gene implicated in morbid obesity. Orthologous to human MCHR1 (melanin concentrating hormone receptor 1). [provided by Alliance of Genome Resources, Apr 2022]