Involved in several behavioral responses including chemotaxis towards lysine and adaptation to repeated osmotic stress. In addition, plays a role in resuming egg-laying and locomotion after starvation. Interacts with tax-6. Expressed from the comma stage to adulthood in the nervous system, including sensory neurons and interneurons posterior to the nerve ring, dorsal and ventral nerve cords, tail ganglia and, CEP, HSN, ASK, ADL, ASH and ASJ neurons. Phosphorylated. Dephosphorylated by tax-6 in vitro. Viable. Shows defects in several behavioral responses, including abnormal avoidance response to the chemoattractant lysine and impaired adaptability induced by prior exposure to high concentration of fructose. Delay in egg-laying upon refeeding after starvation. Slight decrease in brood size. Belongs to the arrestin family.