Tags: Protein.
4-Oxalocrotonate tautomerase (EC 5.3.2.-4-OT) is an enzyme that converts 2-hydroxymuconate to the αβ-unsaturated ketone 2-oxo-3-hexenedioate. This enzyme forms part of a bacterial metabolic pathway that oxidatively catabolizes toluene o-xylene 3-ethyltoluene and 124-trimethylbenzene into intermediates of the citric acid cycle. With a monomer size of just 62 amino acid residues the 4-Oxalocrotonate tautomerase is one of the smallest enzyme subunits known.