Orphan G-protein coupled receptor. Constitutively activates the G(q/11)/inositol phosphate and the G(s)-alpha/cAMP signaling pathways (PubMed:28912303). Has spontaneous activity for beta-arrestin recruitment (By similarity). Shows a reciprocal regulatory interaction with the melatonin receptor MTNR1B most likely through receptor heteromerization (By similarity). Homodimer (PubMed:28912303). Forms heterodimer with MTNR1B (By similarity). Interacts with ARRB1 and ARRB2 in a spontaneous and agonist-independent manner; leading to the internalization of GPR62 in the endosomal compartment (By similarity). Colocalizes with ARRB2 in the endosome. Expressed in the brain and testes. Expressed widely, in the brain, including the cerebral cortex, cerebellum, hippocampus,thalamus and pituitary gland. In the testes, expressed specifically in the germ cells. Expression in the testes starts 25 days after birth and continues thereafter. Lacks the conserved DRY and BBXXB motifs. The restoration of these motifs affects its constitutive activity. Deficient mice show any abnormality in growth and behavior. Both male and female are fertile. Belongs to the G-protein coupled receptor 1 family.