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Gibberellins (GAs) are phytohormones essential for many developmental processes in plants.A nuclear GA receptor, GID1, has a primary structure similar to that of hormone-sensitive lipases (HSPs).The 3D structure of rice GID1 (OsGID1) engaged with a GA4 molecule shows a hydrolase fold similar to that of HSLs, whereas the GA-binding pocket corresponds to the substrate-binding site of HSLs.