GPR4 (G Protein-Coupled Receptor 4) is a Protein Coding gene. Diseases associated with GPR4 include Central Hypoventilation Syndrome, Congenital. Among its related pathways are Signaling by GPCR and RET signaling. GO annotations related to this gene include G-protein coupled receptor activity. An important paralog of this gene is GPR68. Proton-sensing receptor coupled to several G-proteins, including G(s), G(13) and G(q)/G(11) proteins, leading to cAMP production.