Acyrthosiphon pisum AQP2: A multifunctional insect aquaglyceroporin

► A novel aquaglyceroporin ApAQP2 has been identified in the pea aphid A. pisum. ► ApAQP2 is a member of an insect-specific clade of the AQP gene family. ► Members of this clade have unusual pore selectivity sequences. ► ApAQP2 transports a diverse set of substrates including water and multiple polyols. ► ApAQP2 is expressed predominantly in symbiotic bacteriocyte and fat body tissues.