Enables prostaglandin D receptor activity and prostaglandin J receptor activity. Acts upstream of or within several processes, including adenosine metabolic process; cellular response to prostaglandin D stimulus; and male sex determination. Located in plasma membrane. Is expressed in several structures, including alimentary system; brain; hemolymphoid system gland; reproductive system; and respiratory system. Human ortholog(s) of this gene implicated in asthma. Orthologous to human PTGDR (prostaglandin D2 receptor). [provided by Alliance of Genome Resources, Apr 2022]