This enzyme forms part of a bacterial metabolic pathway that oxidatively catabolizes toluene, o-xylene, 3-ethyltoluene, and 1,2,4-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.
This enzyme participates in a bacterial metabolic route that disassembles toluene and its homologs into citric acid cycle precursors via oxidative degradation. Its compact structure comprises just 62 amino acid residues, making it one of the smallest known enzyme subunits.