7-phospho-2-dehydro-3-deoxy-D-arabino-heptonate = 3-dehydroquinate + phosphate Binds 1 divalent metal cation per subunit. Can use either Co(2+) or Zn(2+). Metabolic intermediate biosynthesis; chorismate biosynthesis; chorismate from D-erythrose 4-phosphate and phosphoenolpyruvate: step 2/7. Monomer. In the N-terminal section; belongs to the sugar phosphate cyclases superfamily. Dehydroquinate synthase family. In the C-terminal section; belongs to the GppA/Ppx family.