title: Degradation of paracetamol by Pseudomonas aeruginosa strain HJ1012.
abstract: Pseudomonas aeruginosa strain HJ1012 was isolated on paracetamol as a sole carbon and energy source. This organism could completely degrade paracetamol as high as 2200 mg/L. Following paracetamol consumption, a CO₂ yield rate up to 71.4% proved that the loss of paracetamol was mainly via mineralization. Haldane's equation adequately described the relationship between the specific growth rate and substrate concentration. The maximum specific growth rate and yield coefficient were 0.201 g-Paracetamol/g-VSS·h and 0.101 mg of biomass yield/mg of paracetamol consumed, respectively. A total of 8 metabolic intermediates was identified and classified into aromatic compounds, carboxylic acids, and inorganic species (nitrite and nitrate ions). P-aminophenol and hydroquinone are the two key metabolites of the initial steps in the paracetamol catabolic pathway. Paracetamol is degraded predominantly via p-aminophenol to hydroquinone with subsequent ring fission, suggesting partially new pathways for paracetamol-degrading bacteria.
authors: School of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, China.
authors: Jun
authors: J
authors: Hu
authors: Li L
authors: LL
authors: Zhang
authors: Jian M
authors: JM
authors: Chen
authors: Yu
authors: Y
authors: Liu
mesh_terms: D000082:Acetaminophen / Q000378:metabolism*; D000627:Aminophenols / Q000378:metabolism; D002245:Carbon Dioxide / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D006873:Hydroquinones / Q000378:metabolism; D007700:Kinetics; D053858:Metabolic Networks and Pathways / Q000502:physiology*; D046529:Microscopy, Electron, Transmission; D011550:Pseudomonas aeruginosa / Q000254:growth & development / Q000378:metabolism* / Q000648:ultrastructure; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D000627:Aminophenols; D006873:Hydroquinones; D014874:Water Pollutants, Chemical; D002245:Carbon Dioxide; D000082:Acetaminophen; C026729:4-aminophenol; C031927:hydroquinone