18 Aerobic Degradation of Aromatic Hydrocarbons: Enzyme Structures and Catalytic Mechanisms

摘要: Aerobic microbial degradation pathways for aromatic hydrocarbons utilize enzymes that catalyze reactions between molecular oxygen and the substrate. Hydroxylases initiate of inert by addition atoms as hydroxyl groups to ring. Monooxygenases introduce one atom while dioxygenases both. Ring-cleavage decyclize compounds allowing products be channeled into cell’s central metabolic support growth. Aromatic hydrocarbon oxygenases are often composed several different protein components subunits, but most iron at active site bind activate it or substrate during catalysis.