Introduction
G protein-coupled receptor 12 (GPR12) is a protein coding gene. It is encoded by the GPR12 gene. It is a G protein-coupled orphan receptor genetically related to type 1 and type 2 cannabinoid receptors (CB1 and CB2). CB1 and CB2 are ancient proteins expressed all over the body. Among its related pathways are peptide ligand-binding receptors. Gene ontology (GO) annotations related to this gene include G protein-coupled receptor activity and phosphatidylcholine binding.[provided by GeneCards] In human CNS, GPR12 is mainly expressed in the basal ganglia, the cerebellum, and the cerebral cortex, in a lesser extent in the thalamus, the hippocampus, the olfactory region, and the amygdalae, and scarcely expressed in the hypothalamus, the midbrain, and the corpus callosum. In other words, GPR12 has been mainly detected in structures closely related to cognitive processes, including learning, memory, and the brain reward system, such as the cerebral cortex, the hippocampus, and the striatum. GPR12 has the property of exhibiting a basal G protein-coupling activity, since it upregulates the adenylate cyclase signaling cascade without any activating ligand.

Direction of Drugs Discovery
• Developing New Clinical Effects on GPR12 from Existing Drugs

Drugs
To be updated