Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli
Abstract Escherichia coli strains are generally sensitive to hydrophobic organic solvents such as n-hexane and cyclohexane. Oxidative stress in E. coli by exposure to these hydrophobic organic solvents has been poorly understood. In the present study, we examined organic solvent tolerance and oxygen...
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-06-01
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| Series: | AMB Express |
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| Online Access: | https://doi.org/10.1186/s13568-021-01258-w |
| _version_ | 1818918160003235840 |
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| author | Noriyuki Doukyu Katsuya Taguchi |
| author_facet | Noriyuki Doukyu Katsuya Taguchi |
| author_sort | Noriyuki Doukyu |
| collection | DOAJ |
| description | Abstract Escherichia coli strains are generally sensitive to hydrophobic organic solvents such as n-hexane and cyclohexane. Oxidative stress in E. coli by exposure to these hydrophobic organic solvents has been poorly understood. In the present study, we examined organic solvent tolerance and oxygen radical generation in E. coli mutants deficient in reactive oxygen species (ROS)-scavenging enzymes. The organic solvent tolerances in single gene mutants lacking genes encoding superoxide dismutase (sodA, sodB, and sodC), catalase (katE and katG), and alkyl hydroperoxide reductase (ahpCF) were similar to that of parent strain BW25113. We constructed a BW25113-based katE katG double mutant (BW25113∆katE∆katG) and sodA sodB double mutant (BW25113sodA∆sodB). These double-gene mutants were more sensitive to hydrophobic organic solvents than BW25113. In addition, the intracellular ROS levels in E. coli strains increased by the addition of n-hexane or cyclohexane. The ROS levels in BW25113∆katE∆katG and BW25113∆sodA∆sodB induced by exposure to the solvents were higher than that in BW25113. These results suggested that ROS-scavenging enzymes contribute to the maintenance of organic solvent tolerance in E. coli. In addition, the promoter activities of sodA and sodB were significantly increased by exposure to n-hexane. |
| first_indexed | 2024-12-20T00:45:32Z |
| format | Article |
| id | doaj.art-71fba986e0e6452b8486e5dbcc5d8e2b |
| institution | Directory Open Access Journal |
| issn | 2191-0855 |
| language | English |
| last_indexed | 2024-12-20T00:45:32Z |
| publishDate | 2021-06-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | AMB Express |
| spelling | doaj.art-71fba986e0e6452b8486e5dbcc5d8e2b2022-12-21T19:59:26ZengSpringerOpenAMB Express2191-08552021-06-0111111110.1186/s13568-021-01258-wInvolvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coliNoriyuki Doukyu0Katsuya Taguchi1Department of Life Science, Toyo UniversityDepartment of Life Science, Toyo UniversityAbstract Escherichia coli strains are generally sensitive to hydrophobic organic solvents such as n-hexane and cyclohexane. Oxidative stress in E. coli by exposure to these hydrophobic organic solvents has been poorly understood. In the present study, we examined organic solvent tolerance and oxygen radical generation in E. coli mutants deficient in reactive oxygen species (ROS)-scavenging enzymes. The organic solvent tolerances in single gene mutants lacking genes encoding superoxide dismutase (sodA, sodB, and sodC), catalase (katE and katG), and alkyl hydroperoxide reductase (ahpCF) were similar to that of parent strain BW25113. We constructed a BW25113-based katE katG double mutant (BW25113∆katE∆katG) and sodA sodB double mutant (BW25113sodA∆sodB). These double-gene mutants were more sensitive to hydrophobic organic solvents than BW25113. In addition, the intracellular ROS levels in E. coli strains increased by the addition of n-hexane or cyclohexane. The ROS levels in BW25113∆katE∆katG and BW25113∆sodA∆sodB induced by exposure to the solvents were higher than that in BW25113. These results suggested that ROS-scavenging enzymes contribute to the maintenance of organic solvent tolerance in E. coli. In addition, the promoter activities of sodA and sodB were significantly increased by exposure to n-hexane.https://doi.org/10.1186/s13568-021-01258-wEscherichia coliOrganic solvent toleranceCatalaseSuperoxide dismutaseReactive oxygen species |
| spellingShingle | Noriyuki Doukyu Katsuya Taguchi Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli AMB Express Escherichia coli Organic solvent tolerance Catalase Superoxide dismutase Reactive oxygen species |
| title | Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli |
| title_full | Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli |
| title_fullStr | Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli |
| title_full_unstemmed | Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli |
| title_short | Involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of Escherichia coli |
| title_sort | involvement of catalase and superoxide dismutase in hydrophobic organic solvent tolerance of escherichia coli |
| topic | Escherichia coli Organic solvent tolerance Catalase Superoxide dismutase Reactive oxygen species |
| url | https://doi.org/10.1186/s13568-021-01258-w |
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