Pyruvate phosphate dikinase (PPDK) catalyzes the phosphorylation reaction of pyruvate that forms phosphoenolpyruvate (PEP) via two partial reactions: PPDK+ ATP+ Pi→ PPDK-P+ AMP+ PPi and PPDK-P+ pyruvate→ PEP+ PPDK. Based on its role in the metabolism of microbial human pathogens, PPDK is a potential drug target. A screen of substances that bind to the PPDK ATP-grasp domain active site revealed that flavone analogues are ...