Characterization of successive ortho-methyl oxidation of the priority pollutant 2,4-xylenol by a Rieske oxygenase system in Pseudomonas putida NCIMB 9866.
- Open access
A novel Rieske oxygenase system in Pseudomonas putida NCIMB 9866 enables successive oxidation of 2,4-xylenol’s ortho-methyl group into a valuable pharmaceutical precursor.
- Why it matters: Understanding how bacteria degrade methylated aromatic pollutants like 2,4-xylenol is crucial for bioremediation and sustainable chemical synthesis, yet the enzymatic mechanisms remain unclear.
- What they did: Researchers characterized a three-component Rieske oxygenase system, PmmA1B1-Orf05169, along with redundant pathways, using structural and kinetic analyses to elucidate enzyme functions in methyl oxidation.
- The result: This work completes the 2,4-xylenol degradation pathway, reveals functional redundancy as an adaptive feature, and establishes Rieske oxygenases as versatile biocatalysts for converting pollutants into high-value chemicals.