Enables C5a anaphylatoxin chemotactic receptor binding activity. Involved in several processes, including glucose homeostasis; leukocyte migration involved in inflammatory response; and negative regulation of catecholamine secretion. Located in extracellular space. Used to study adult respiratory distress syndrome; asthma; and neutropenia. Biomarker of brain edema. Human ortholog(s) of this gene implicated in several diseases, including complement component 5 deficiency; liver cirrhosis; neutropenia; paroxysmal nocturnal hemoglobinuria; and pneumonia. Orthologous to human C5 (complement C5). [provided by Alliance of Genome Resources, Apr 2022]