Receptor for cAMP. Coordinates the aggregation of individual cells into a multicellular organism and regulates the expression of a large number of developmentally regulated genes. The activity of this receptor is mediated by G proteins. Plays a key role during tip formation and late development; involved in cAMP-directed patterning of pre stalk cells as they sort before and during tip formation. Expressed only after cells have aggregated and, then, preferentially in prestalk cells. C-terminal Ser or Thr residues may be phosphorylated. Belongs to the G-protein coupled receptor 5 family.