A disulfide bond sculpts the CTNIP4 phytocytokine fold for recognition by the receptor kinase HSL3
Precise ligand recognition by closely related leucine-rich repeat receptor kinases (LRR-RKs) is essential for plants to coordinate immunity, development and environmental adaptation. Here we show how the LRR-RK HSL3/NUT specifically recognizes the folded, disulfide-stabilized CTNIP4/SCREW2 phytocytokine in Arabidopsis....