Fatty acids and uridine diphosphate (UDP)-sugars are essential metabolites involved in the biosynthesis of polysaccharides and lipids, both of which are critical for anther development in plants. Our previous study identified Defective Pollen Wall (DPW), a rice fatty acyl carrier protein reductase (FAR), as a key factor in pollen wall formation. In this study, we demonstrate that the structure of DPW in complex with its cofactor NADP