Converts o-succinylbenzoyl-CoA (OSB-CoA) to 1,4-dihydroxy-2-naphthoyl-CoA (DHNA-CoA). 2-succinylbenzoyl-CoA + H(+) = 1,4-dihydroxy-2-naphthoyl-CoA + H2O The hydrogencarbonate anion plays the same catalytic role (proton acceptor) as the side-chain carboxylate group of the essential 'Asp-185' found in actinobacteria, archaea, bacteroidetes, and deltaproteobacteria. Inhibited by sulfite and nitrate. kcat is 620 sec(-1) with o-succinylbenzoyl-CoA as substrate(PubMed:21830810). kcat is 1.24 min(-1) with o-succinylbenzoyl-CoA as substrate (PubMed:23658663). All assays are performed at pH 7.0 at 25 degrees Celsius and in the presence of 20 mM NaHCO(3). Quinol/quinone metabolism; 1,4-dihydroxy-2-naphthoate biosynthesis; 1,4-dihydroxy-2-naphthoate from chorismate: step 6/7. Quinol/quinone metabolism; menaquinone biosynthesis. Homohexamer. Dimer of a homotrimer. Belongs to the enoyl-CoA hydratase/isomerase family. MenB subfamily.