Enables prostaglandin D receptor activity; prostaglandin F receptor activity; and prostaglandin J receptor activity. Acts upstream of or within several processes, including adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway; negative regulation of male germ cell proliferation; and positive regulation of G protein-coupled receptor signaling pathway. Predicted to be located in plasma membrane. Predicted to be integral component of membrane. Predicted to be active in neuron projection. Predicted to be integral component of plasma membrane. Human ortholog(s) of this gene implicated in asthma. Orthologous to human PTGDR2 (prostaglandin D2 receptor 2). [provided by Alliance of Genome Resources, Apr 2022]