Fig. 3.

PAMP- or DAMP-induced receptor complexes in plant immunity. PAMPs (red) or DAMPs (blue) are perceived by RLK- or RLP-type receptors in Arabidopsis. The SERK-family LRR-RLKs and the LysM-RLK CERK1 form ligand-induced complexes with LRR- and LysM-containing receptors, respectively, to mediate PTI. BAK1 and SERK4 are recruited upon ligand perception by the LRR-RLK-type receptors FLS2, EFR, PEPR1 and PEPR2. The LRR-RLP-type receptor RLP23, which constitutively forms a complex with the LRR-RLK SOBIR1, also recruits BAK1 upon ligand perception. Both BAK1 and SOBIR1 are required for RLP30-mediated immunity, which implies that RLP30 may also be in a complex with both BAK1 and SOBIR1. CERK1 forms ligand-induced complexes with the LysM-RLK-type receptor LYK5, and the LysM-RLP-type receptors LYM1 and LYM3, respectively.