 RRS1-RPS4 receptor pair

The RRS1-RPS4 receptor pair is a coupled immune-receptor system studied in Arabidopsis thaliana. RRS1 includes a WRKY domain resembling targets of pathogen activity, providing an integrated decoy linked to recognition and signaling by the pair.

The mechanism illustrates how a plant can monitor an attack on a host-like structure rather than recognizing only one isolated foreign pattern. It also explains why transferring or losing one receptor need not preserve the behavior of the complete paired NLR system.^[ref]