Predicted to enable G protein-coupled receptor activity; complement component C3a binding activity; and complement component C3a receptor activity. Involved in positive regulation of angiogenesis; positive regulation of vascular endothelial growth factor production; and regulation of granulocyte chemotaxis. Predicted to be located in membrane. Predicted to be integral component of membrane. Predicted to be active in plasma membrane. Is expressed in several structures, including bladder; cerebral cortex; gut; male reproductive gland or organ; and skin. Human ortholog(s) of this gene implicated in asthma. Orthologous to human C3AR1 (complement C3a receptor 1). [provided by Alliance of Genome Resources, Apr 2022]