Has a role in the establishment of anterior-posterior polarity in tissues during embryogenesis. Required for the alignment of the mitotic spindles and division planes. May have a role in cell death events. Required for normal defection and oocyte fertilization. Involved in sperm function. Operates in pharyngeal pumping during feeding. Monomer and homodimer. Expressed in epidermal precursor cells and pharyngeal primordium. In adults expression is seen in pharyngeal muscle cells and nervous system, the nerve ring, the gonad, and the vulva. Expressed during oogenesis, embryogenesis, and organogenesis. The GPS domain is required for signaling. Approximately 17% arrest during embryogenesis and 56% arrest at the L1 developmental stage. Defects present in seam cell positioning and division plane. Unfertilized oocytes in hermaphrodites. Five-fold less sensitive to the inhibitory effects of emodepside or imipramine on pharyngeal pumping. Irregular defecation. Belongs to the G-protein coupled receptor 2 family. LN-TM7 subfamily.