Converts 2-succinyl-6-hydroxy-2,4-cyclohexadiene-1-carboxylate (SHCHC) to 2-succinylbenzoate (OSB) (PubMed:24060347, PubMed:24872444). Does not show N-succinylamino acid racemase (NSAR) activity with N-succinyl-L-phenylglycine as substrate (PubMed:24872444). (1R,6R)-6-hydroxy-2-succinyl-cyclohexa-2,4-diene-1-carboxylate = 2-succinylbenzoate + H2O kcat is 122 sec(-1) with SHCHC as substrate. Quinol/quinone metabolism; 1,4-dihydroxy-2-naphthoate biosynthesis; 1,4-dihydroxy-2-naphthoate from chorismate: step 4/7. Quinol/quinone metabolism; menaquinone biosynthesis. Monomer. The 20s loop, a flexible loop in the active site that permits ligand binding and release in most enolase superfamily proteins, has a four-amino acid deletion and is well-ordered in T.fusca OSBS. Belongs to the mandelate racemase/muconate lactonizing enzyme family. MenC type 1 subfamily.