Neuropeptide that controls movement such as roaming, foraging and backwards locomotion or 'reversals' in response to environmental cues such as food availability or volatile odorants such as octanol (PubMed:18216257, PubMed:27223098). Antagonizes AIB interneuron activity to control bacterial colonization and may negatively regulate the expression of immunity-related genes such as pqm-1 and dod-22 in response to infection by P.aeruginosa (PubMed:27133473). Exclusively expressed in the AIB interneuron. Not expressed in embryos, but is expressed in the AIB interneuron region of the head during all larval stages of development. Decreased roaming in response to food during the L3 and L4 stages of larval development and adult stages, but not at the L1 stage of larval development. Increased lipid accumulation. Belongs to the G-protein coupled receptor 1 family.