Glycan recognition by a plant damage-sensing immune receptor.

IGP1 receptor in plants specifically recognizes cellulose-derived DAMPs through a highly selective sugar-binding pocket, enabling rapid immune responses.

• Why it matters: Understanding how plants detect cell wall damage is crucial for revealing mechanisms of immune activation and developing disease-resistant crops. The molecular basis of DAMP recognition remains unclear, limiting insights into plant defense strategies.
• What they did: Researchers determined the structure of the extracellular domain of IGP1 in both unbound and cellotriose-bound forms, revealing preconfigured ligand recognition features and a specific glycan-binding pocket.
• The result: The findings suggest IGP1 functions as a cell wall surveillance receptor that directly senses cello-oligomers, linking wall degradation to immune activation and enabling plants to mount swift defenses.