May be involved in early development in cAMP sensing and subsequent chemotactic response. Probable receptor of GABA and glutamate, leading respectively to the induction or inhibition of SDF-2 formation. Expressed throughout development. Expression is very low in vegetative cells and starts to accumulate in the first 2 hours after the initiation of development. It reaches a peak at 4 hours and then declines. However, a slightly larger transcript accumulates after 10 hours and remains until 22 hours of development. Down-regulated by growth on bacteria. Cells grow faster, reach higher densities, exhibit delayed aggregates formation upon starvation and altered chemotaxis toward cAMP. Cells do not produce SDF-2 in response to GABA. Belongs to the G-protein coupled receptor 3 family.