C3a is an anaphylatoxin released during activation of the complement system. The protein encoded by this gene is an orphan G protein-coupled receptor for C3a. Binding of C3a by the encoded receptor activates chemotaxis, granule enzyme release, superoxide anion production, and bacterial opsonization. [provided by RefSeq, May 2016],C3AR1,AZ3B,C3AR,HNFAG09,Signal Transduction,G protein signaling,G-Protein-Coupled Receptors(GPCR),Immunology & Inflammation,Cell Intrinsic Innate Immunity Signaling Pathway,C3AR1