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- W2155481565 abstract "Polaromonas sp. strain JS666 is the only bacterial isolate capable of using cis-dichloroethene (cDCE) as a sole carbon and energy source. Studies of cDCE degradation in this novel organism are of interest because of potential bioremediation and biocatalysis applications. The primary cellular responses of JS666 to growth on cDCE were explored using proteomics and transcriptomics to identify the genes upregulated by cDCE. Two-dimensional gel electrophoresis revealed upregulation of genes annotated as encoding glutathione S-transferase, cyclohexanone monooxygenase, and haloacid dehalogenase. DNA microarray experiments confirmed the proteomics findings that the genes indicated above were among the most highly upregulated by cDCE. The upregulation of genes with antioxidant functions and the inhibition of cDCE degradation by elevated oxygen levels suggest that cDCE induces an oxidative stress response. Furthermore, the upregulation of a predicted ABC transporter and two sodium/solute symporters suggests that transport is important in cDCE degradation. The omics data were integrated with data from compound-specific isotope analysis (CSIA) and biochemical experiments to develop a hypothesis for cDCE degradation pathways in JS666. The CSIA results indicate that the measured isotope enrichment factors for aerobic cDCE degradation ranged from -17.4 to -22.4 per thousand. Evidence suggests that cDCE degradation via monooxygenase-catalyzed epoxidation (C C cleavage) may be only a minor degradation pathway under the conditions of these experiments and that the major degradation pathway involves carbon-chloride cleavage as the initial step, a novel mechanism. The results provide a significant step toward elucidation of cDCE degradation pathways and enhanced understanding of cDCE degradation in JS666." @default.
- W2155481565 created "2016-06-24" @default.
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- W2155481565 date "2009-06-01" @default.
- W2155481565 modified "2023-10-18" @default.
- W2155481565 title "Proteomic and Transcriptomic Analyses Reveal Genes Upregulated by <i>cis</i> -Dichloroethene in <i>Polaromonas</i> sp. Strain JS666" @default.
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- W2155481565 doi "https://doi.org/10.1128/aem.00031-09" @default.
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