This gene encodes a member of the G-protein coupled receptor 1 family of proteins. Binding of the encoded protein to its phospholipid ligand, platelet-activating factor (PAF), may regulate the inflammatory response and the perception of pain. Homozygous knockout mice for this gene exhibit impaired anaphylactic response, resistance to bacterial infection, and reduced pain-related behavior. [provided by RefSeq, Aug 2015]