GPCR19 is a G protein-coupled receptor belonging to the G protein-coupled receptor family. It is primarily composed of seven transmembrane domains and is located on the cell membrane. In cells or tissues, it is mainly localized to the cytoplasmic membrane. GPCR19 is involved in regulating various biological responses, such as cell proliferation, apoptosis, and cell migration. Its signaling pathways include activation of protein kinase C and phosphoinositide 3-kinase.