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Transcriptomic analysis of Burkholderia cenocepacia CEIB S5-2 during methyl parathion degradation

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Abstract

Methyl parathion (MP) is a highly toxic organophosphorus pesticide associated with water, soil, and air pollution events. The identification and characterization of microorganisms capable of biodegrading pollutants are an important environmental task for bioremediation of pesticide impacted sites. The strain Burkholderia cenocepacia CEIB S5-2 is a bacterium capable of efficiently hydrolyzing MP and biodegrade p-nitrophenol (PNP), the main MP hydrolysis product. Due to the high PNP toxicity over microbial living forms, the reports on bacterial PNP biodegradation are scarce. According to the genomic data, the MP- and PNP-degrading ability observed in B. cenocepacia CEIB S5-2 is related to the presence of the methyl parathion-degrading gene (mpd) and the gene cluster pnpABA’E1E2FDC, which include the genes implicated in the PNP degradation. In this work, the transcriptomic analysis of the strain in the presence of MP revealed the differential expression of 257 genes, including all genes implicated in the PNP degradation, as well as a set of genes related to the sensing of environmental changes, the response to stress, and the degradation of aromatic compounds, such as translational regulators, membrane transporters, efflux pumps, and oxidative stress response genes. These findings suggest that these genes play an important role in the defense against toxic effects derived from the MP and PNP exposure. Therefore, B. cenocepacia CEIB S5-2 has a great potential for application in pesticide bioremediation approaches due to its biodegradation capabilities and the differential expression of genes for resistance to MP and PNP.

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Availability of the data

Genomic data are available at NCBI with the following BioProject accession PRJNA 301637.

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Acknowledgements

This work was supported by for the National Council for Science and Technology (CONACyT for its acronym in Spanish). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

Funding

The present study was founded by the National Council for Science and Technology (CONACyT), grant No. CB2014-240414.

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Authors

Contributions

Ma. Laura Ortiz-Hernández, Alexis Rodríguez, and Patricia Mussali-Galante conceived and designed the experiments; contributed with reagents, materials, and analysis tools; and conducted data analysis and the manuscript writing. Yitzel Gama-Martínez, Maikel Fernández-López, and Emmanuel Salazar conducted experiments. María Luisa Castrejón-Godínez prepared the figures and tables and redacted the manuscript. Sergio Encarnación and Efraín Tovar-Sánchez analyzed the data and contributed with reagents, materials, and analysis tools. All authors read and approved the manuscript.

Corresponding authors

Correspondence to Alexis Rodríguez or Patricia Mussali-Galante.

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The present study does not contain any studies with humans or animals performed by any of the authors.

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All authors and institutions where the work was carried out have approved the content and authorship of the manuscript.

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The authors declare that they have no conflict of interest.

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Responsible editor: Philipp Gariguess

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Ortiz-Hernández, M.L., Gama-Martínez, Y., Fernández-López, M. et al. Transcriptomic analysis of Burkholderia cenocepacia CEIB S5-2 during methyl parathion degradation. Environ Sci Pollut Res 28, 42414–42431 (2021). https://doi.org/10.1007/s11356-021-13647-6

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  • DOI: https://doi.org/10.1007/s11356-021-13647-6

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