Abstract
Toxic polycyclic aromatic hydrocarbons (PAHs) are often released into the environment during the combustion and processing of fossil fuels and are capable of causing significant pollution to people and the environment. One of the representative substances of PAHs is phenanthrene, which is often studied as a model compound for PAHs treatment. In this study, we compared the results of transcriptome analysis of Pseudomonas stutzeri LH-42 in two different culture conditions under phenanthrene-induced culture (test group) and glucose-induced culture (control group), and analysed the key enzymatic mechanisms of Pseudomonas stutzeri LH-42 in the biodegradation of phenanthrene. In our experiments, the transcriptome results showed that a total of 380 genes were more than twofold differentially expressed in the test group, of which 187 genes were significantly up-regulated in expression under Phenanthrene induction. Among the 380 differentially expressed genes, 90 genes were involved in Phenanthrene biodegradation, mainly including genes involved in biometabolism, cellular chemotaxis, substrate transport, signal induction and other related processes. Based on the transcriptome sequence analysis of Pseudomonas stutzeri LH-42 at the time of phenanthrene induction, a total of 25 dioxygenase genes were identified, and the related genes were mainly concentrated in two relatively concentrated clusters of PAHs biodegradation genes. The transcriptome analysis resulted in a complete set of enzyme genes related to the phenanthrene biodegradation pathway. The analysis of key enzymes led to the inference of a possible phenanthrene biodegradation pathway: the salicylic acid degradation pathway. The results of this study provide a theoretical basis for in situ remediation of PAHs-contaminated environments using Pseudomonas stutzeri LH-42.
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This work was supported by the Fundamental Research Funds for the Central Universities of Central South University (2017zzts383).
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The authors declare that they have no conflict of interest in the publication. As a graduating student, I hereby declare that all the experimental contents and materials in the research were carried out under the supervision and guidance of the school and the tutor. The other authors are my tutor and several classmates, there were no legal or moral violations of any kind throughout the study.
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Fu, Q., Hu, T., Yang, Y. et al. Transcriptome analysis reveals phenanthrene degradation strategy of Pseudomonas stutzeri LH-42. 3 Biotech 13, 65 (2023). https://doi.org/10.1007/s13205-023-03473-7
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DOI: https://doi.org/10.1007/s13205-023-03473-7