Removes the pyruvyl group from chorismate, with concomitant aromatization of the ring, to provide 4-hydroxybenzoate (4HB) for the ubiquinone pathway. chorismate = 4-hydroxybenzoate + pyruvate Inhibited by 4-hydroxybenzoate, vanillate, 4-hydroxybenzaldehyde and 3-carboxymethylaminomethyl-4-hydroxybenzoic acid. Optimum pH is 7.5. Cofactor biosynthesis; ubiquinone biosynthesis. Monomer. The sdgG mutation, which suppresses a conditional mutation in dnaG (DNA primase), has been localized to one of the ubiA, ubiC or yjbI genes. Belongs to the UbiC family. Extended N-terminus. Extended N-terminus.