Figure 1. Ligand recognition and atypical signalling by the chemokine decoy and scavenger receptor ACKR2.
ACKR2 binds with high affinity inflammatory CC chemokines; it signals through β-arrestin and the small GTPase Rac1 activating cytoskeleton rearrangement in order to optimize the chemokine scavenging activity. It is not known if the interaction of ACKR2 with β-arrestin could have an inhibitory function on other signalling pathways.