Potent Inhibition of 3‑Deoxy‑d‑arabinoheptulosonate-7-phosphate (DAHP) Synthase by DAHP Oxime, a Phosphate Group Mimic

3-Deoxy-d-arabinoheptulosonate-7-phosphate (DAHP) synthase catalyzes the first step in the shikimate pathway. It catalyzes an aldol-like reaction of phosphoenolpyruvate (PEP) with erythrose 4-phosphate (E4P) to form DAHP. The kinetic mechanism was rapid equilibrium sequential ordered ter ter, with the essential divalent metal ion, Mn²⁺, binding first, followed by PEP and E4P. DAHP oxime, in which an oxime group replaces the keto oxygen, was a …