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biodegradation

  • Open Access
    Regulatory Mechanism of Nicotine Degradation in <em>Pseudomonas putida</em>
    Research Article | Molecular Biology and Physiology
    Regulatory Mechanism of Nicotine Degradation in Pseudomonas putida

    We report the entire process underlying the NicR2 regulatory mechanism from association between free NicR2 and two promoters to dissociation of the NicR2-promoter complex. NicR2 can bind to another promoter, Pspm, which controls expression of nicotine-degrading genes that are not controlled by the Phsp promoter. We identified specific nucleotides of the Pspm promoter responsible for NicR2 binding. HSP was...

    Haiyang Hu, Lijuan Wang, Weiwei Wang, Geng Wu, Fei Tao, Ping Xu, Zixin Deng, Hongzhi Tang
  • Open Access
    The Effect of Cellular Redox Status on the Evolvability of New Catabolic Pathways
    Commentary | Molecular Biology and Physiology
    The Effect of Cellular Redox Status on the Evolvability of New Catabolic Pathways

    Oxidation of aromatic compounds can be mutagenic due to the accumulation of reactive oxygen species (ROS) in bacterial cells and thereby facilitate evolution of corresponding catabolic pathways. To examine the effect of the background biochemical network on the evolvability of environmental bacteria hosting a new catabolic pathway, Akkaya and colleagues (mBio 9:e01512-18, 2018, https://doi...

    Maia Kivisaar
  • Open Access
    Editor's Pick Research Article
    The Metabolic Redox Regime of Pseudomonas putida Tunes Its Evolvability toward Novel Xenobiotic Substrates

    Some environmental bacteria evolve with new capacities for the aerobic biodegradation of chemical pollutants by adapting preexisting redox reactions to novel compounds. The process typically starts by cooption of enzymes from an available route to act on the chemical structure of the substrate-to-be. The critical bottleneck is generally the first biochemical step, and most of the selective pressure operates on reshaping the initial...

    Özlem Akkaya, Danilo R. Pérez-Pantoja, Belén Calles, Pablo I. Nikel, Víctor de Lorenzo
  • Open Access
    Research Article
    AupA and AupB Are Outer and Inner Membrane Proteins Involved in Alkane Uptake in Marinobacter hydrocarbonoclasticus SP17
    Julie Mounier, Florence Hakil, Priscilla Branchu, Muriel Naïtali, Philippe Goulas, Pierre Sivadon, Régis Grimaud
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