Orphan G-protein coupled receptor. Constitutively activates the G(q/11)/inositol phosphate and the G(s)-alpha/cAMP signaling pathways (PubMed:28827538). Has spontaneous activity for beta-arrestin recruitment (PubMed:28827538). Shows a reciprocal modulation of signaling functions with the melatonin receptor MTNR1B most likely through receptor heteromerization (PubMed:28827538). Homodimers (By similarity). Forms heterodimer with MTNR1B (PubMed:28827538). Interacts with ARRB1 and ARRB2 in a spontaneous and agonist-independent manner; leading to the internalization of GPR62 in the endosomal compartment (PubMed:28827538). Colocalizes with ARRB2 in the endosome (PubMed:28827538). Expressed in brain; detected in the basal forebrain, frontal cortex, caudate, putamen, thalamus and hippocampus. Lacks the conserved DRY and BBXXB motifs. The restoration of these motifs affects its constitutive activity. Belongs to the G-protein coupled receptor 1 family.