1
|
Gao J, Li Z, Zhu B, Wang L, Xu J, Wang B, Fu X, Han H, Zhang W, Deng Y, Wang Y, Zuo Z, Peng R, Tian Y, Yao Q. Creation of Environmentally Friendly Super "Dinitrotoluene Scavenger" Plants. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2303785. [PMID: 37715295 PMCID: PMC10602510 DOI: 10.1002/advs.202303785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 08/15/2023] [Indexed: 09/17/2023]
Abstract
Pervasive environmental contamination due to the uncontrolled dispersal of 2,4-dinitrotoluene (2,4-DNT) represents a substantial global health risk, demanding urgent intervention for the removal of this detrimental compound from affected sites and the promotion of ecological restoration. Conventional methodologies, however, are energy-intensive, susceptible to secondary pollution, and may inadvertently increase carbon emissions. In this study, a 2,4-DNT degradation module is designed, assembled, and validated in rice plants. Consequently, the modified rice plants acquire the ability to counteract the phytotoxicity of 2,4-DNT. The most significant finding of this study is that these modified rice plants can completely degrade 2,4-DNT into innocuous substances and subsequently introduce them into the tricarboxylic acid cycle. Further, research reveals that the modified rice plants enable the rapid phytoremediation of 2,4-DNT-contaminated soil. This innovative, eco-friendly phytoremediation approach for dinitrotoluene-contaminated soil and water demonstrates significant potential across diverse regions, substantially contributing to carbon neutrality and sustainable development objectives by repurposing carbon and energy from organic contaminants.
Collapse
|
2
|
Sazykin IS, Sazykina MA. The role of oxidative stress in genome destabilization and adaptive evolution of bacteria. Gene X 2023; 857:147170. [PMID: 36623672 DOI: 10.1016/j.gene.2023.147170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 12/14/2022] [Accepted: 01/03/2023] [Indexed: 01/09/2023] Open
Abstract
The review is devoted to bacterial genome destabilization by oxidative stress. The article discusses the main groups of substances causing such stress. Stress regulons involved in destabilization of genetic material and mechanisms enhancing mutagenesis, bacterial genome rearrangements, and horizontal gene transfer, induced by oxidative damage to cell components are also considered. Based on the analysis of publications, it can be claimed that rapid development of new food substrates and ecological niches by microorganisms occurs due to acceleration of genetic changes induced by oxidative stress, mediated by several stress regulons (SOS, RpoS and RpoE) and under selective pressure. The authors conclude that non-lethal oxidative stress is probably-one of the fundamental processes that guide evolution of prokaryotes and a powerful universal trigger for adaptive destabilization of bacterial genome under changing environmental conditions.
Collapse
Affiliation(s)
- I S Sazykin
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don 344090, Russian Federation
| | - M A Sazykina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don 344090, Russian Federation.
| |
Collapse
|
3
|
Pérez-Pantoja D, Nikel PI, Chavarría M, de Lorenzo V. Transcriptional control of 2,4-dinitrotoluene degradation in Burkholderia sp. R34 bears a regulatory patch that eases pathway evolution. Environ Microbiol 2021; 23:2522-2531. [PMID: 33734558 DOI: 10.1111/1462-2920.15472] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 02/27/2021] [Accepted: 03/16/2021] [Indexed: 11/26/2022]
Abstract
The dnt pathway of Burkholderia sp. R34 is in the midst of an evolutionary journey from its ancestral, natural substrate (naphthalene) towards a new xenobiotic one [2,4-dinitrotoluene (DNT)]. The gene cluster encoding the leading multicomponent ring dioxygenase (DntA) has activity on the old and the new substrate, but it is induced by neither. Instead, the transcriptional factor encoded by the adjacent gene (dntR) activates expression of the dnt cluster upon addition of salicylate, one degradation intermediate of the ancestral naphthalene route but not any longer a substrate/product of the evolved DntA enzyme. Fluorescence of cells bearing dntA-gfp fusions revealed that induction of the dnt genes by salicylate was enhanced upon exposure to bona fide DntA substrates, i.e., naphthalene or DNT. Such amplification was dependent on effective dioxygenation of these pathway-specific head compounds, which thereby fostered expression of the cognate catabolic operon. The phenomenon seems to happen not through direct binding to a cognate transcriptional factor but through the interplay of a non-specific regulator with a substrate-specific enzyme. This regulatory scenario may ease transition of complete catabolic operons (i.e. enzymes plus regulatory devices) from one substrate to another without loss of fitness during the evolutionary roadmap between two optimal specificities.
Collapse
Affiliation(s)
- Danilo Pérez-Pantoja
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación (PIDi), Universidad Tecnológica Metropolitana, Santiago, 8940577, Chile
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, Kgs Lyngby, 2800, Denmark
| | - Max Chavarría
- Escuela de Química and CIPRONA, Universidad de Costa Rica, San José, 2060, Costa Rica
| | - Víctor de Lorenzo
- Systems and Synthetic Biology Department, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, 28049, Spain
| |
Collapse
|
4
|
Sazykin IS, Minkina TM, Khmelevtsova LE, Antonenko EM, Azhogina TN, Dudnikova TS, Sushkova SN, Klimova MV, Karchava SK, Seliverstova EY, Kudeevskaya EM, Konstantinova EY, Khammami MI, Gnennaya NV, Al-Rammahi AAK, Rakin AV, Sazykina MA. Polycyclic aromatic hydrocarbons, antibiotic resistance genes, toxicity in the exposed to anthropogenic pressure soils of the Southern Russia. ENVIRONMENTAL RESEARCH 2021; 194:110715. [PMID: 33444610 DOI: 10.1016/j.envres.2021.110715] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 11/02/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
The influence of anthropogenic pollution, particularly with polycyclic aromatic hydrocarbons (PAHs) on soil toxicity and spread of antibiotic resistance genes (ARGs) is extremely important nowadays. We studied 20 soil samples from a technogenically polluted site, municipal solid wastes (MSW) landfills, and rural settlements in the southwestern part of the Rostov Region of Russia. A close correlation was established between the results of biosensor testing for integral toxicity, the content of genes for the biodegradation of hydrocarbons, and the concentration of PAHs in soils. The relation between the quantitative content of ARGs and the qualitative and quantitative composition of PAHs has not been registered. Soils subjected to different types of the anthropogenic pressure differed in PAHs composition. The technogenic soils are the most polluted ones. These soils are enriched with 5 ring PAHs and carry the maximum variety of assayed ARGs, despite the fact that they do not receive household or medical waste.
Collapse
Affiliation(s)
- I S Sazykin
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - T M Minkina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - L E Khmelevtsova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E M Antonenko
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - T N Azhogina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - T S Dudnikova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - S N Sushkova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - M V Klimova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - Sh K Karchava
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E Yu Seliverstova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E M Kudeevskaya
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - E Yu Konstantinova
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - M I Khammami
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - N V Gnennaya
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation
| | - A A K Al-Rammahi
- Technical University Al-Furat Al-Awsat, 70, Hill St., Najaf, 54003, Iraq
| | - A V Rakin
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute for Bacterial Infections and Zoonoses, 96a, Naumburger St., Jena, D-07743, Germany
| | - M A Sazykina
- Southern Federal University, 194/2 Stachki Avenue, Rostov-on-Don, 344090, Russian Federation.
| |
Collapse
|
5
|
Pu Q, Fan XT, Li H, An XL, Lassen SB, Su JQ. Cadmium enhances conjugative plasmid transfer to a fresh water microbial community. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 268:115903. [PMID: 33120155 DOI: 10.1016/j.envpol.2020.115903] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 10/14/2020] [Accepted: 10/18/2020] [Indexed: 05/11/2023]
Abstract
Co-selection of antibiotic resistance genes (ARGs) by heavy metals might facilitate the spread of ARGs in the environments. Cadmium contamination is ubiquitous, while, it remains unknown the extent to which cadmium (Cd2+) impact plasmid-mediated transfer of ARGs in aquatic bacterial communities. In the present study, we found that Cd2+ amendment at sub-inhibitory concentration significantly increased conjugation frequency of RP4 plasmid from Pseudomonas putida KT2442 to a fresh water microbial community by liquid mating method. Cd2+ treatment (1-100 mg/L) significantly increased the cell membrane permeability and antioxidant activities of conjugation mixtures. Amendments of 10 and 100 mg/L Cd2+ significantly enhanced the mRNA expression levels of mating pair formation gene (trbBp) and the DNA transfer and replication gene (trfAp) due to the repression of regulatory genes (korA, korB and trbA). Phylogenetic analysis of transconjugants indicated that Proteobacteria was the dominant recipients and high concentration of Cd2+ treatment resulted in expanded recipient taxa. This study suggested that sub-inhibitory Cd2+ contamination would facilitate plasmid conjugation and contributed to the maintenance and spread of plasmid associated ARGs, and highlighted the urgent need for effective remediation of Cd2+ in aquatic environments.
Collapse
Affiliation(s)
- Qiang Pu
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
| | - Xiao-Ting Fan
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing, 100049, China
| | - Hu Li
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China
| | - Xin-Li An
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China
| | - Simon Bo Lassen
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China; Department of Plant and Environmental Sciences, University of Copenhagen, Thorvaldsensvej 40, 1871, Frederiksberg C, Denmark; Sino-Danish Center of Education and Research, Beijing, China
| | - Jian-Qiang Su
- Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen, 361021, China.
| |
Collapse
|
6
|
de Lorenzo V, Krasnogor N, Schmidt M. For the sake of the Bioeconomy: define what a Synthetic Biology Chassis is! N Biotechnol 2020; 60:44-51. [PMID: 32889152 DOI: 10.1016/j.nbt.2020.08.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 08/05/2020] [Accepted: 08/08/2020] [Indexed: 12/14/2022]
Abstract
At the onset of the 4th Industrial Revolution, the role of synthetic biology (SynBio) as a fuel for the bioeconomy requires clarification of the terms typically adopted by this growing scientific-technical field. The concept of the chassis as a defined, reusable biological frame where non-native components can be plugged in and out to create new functionalities lies at the boundary between frontline bioengineering and more traditional recombinant DNA technology. As synthetic biology leaves academic laboratories and starts penetrating industrial and environmental realms regulatory agencies demand clear definitions and descriptions of SynBio constituents, processes and products. In this article, the state of the ongoing discussion on what is a chassis is reviewed, a non-equivocal nomenclature for the jargon used is proposed and objective criteria are recommended for distinguishing SynBio agents from traditional GMOs. The use of genomic barcodes as unique identifiers is strongly advocated. Finally the soil bacterium Pseudomonas putida is shown as an example of the roadmap that one environmental isolate may go through to become a bona fide SynBio chassis.
Collapse
Affiliation(s)
- Víctor de Lorenzo
- Systems and Synthetic Biology Department, Centro Nacional de Biotecnología (CNB-CSIC) Madrid 28049, Spain.
| | - Natalio Krasnogor
- Interdisciplinary Computing and Complex Biosystems (ICOS) research group, Newcastle University, Newcastle Upon Tyne NE4 5TG UK
| | | |
Collapse
|
7
|
Fedeson DT, Saake P, Calero P, Nikel PI, Ducat DC. Biotransformation of 2,4-dinitrotoluene in a phototrophic co-culture of engineered Synechococcus elongatus and Pseudomonas putida. Microb Biotechnol 2020; 13:997-1011. [PMID: 32064751 PMCID: PMC7264894 DOI: 10.1111/1751-7915.13544] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 01/27/2020] [Accepted: 01/28/2020] [Indexed: 12/28/2022] Open
Abstract
In contrast to the current paradigm of using microbial mono-cultures in most biotechnological applications, increasing efforts are being directed towards engineering mixed-species consortia to perform functions that are difficult to programme into individual strains. In this work, we developed a synthetic microbial consortium composed of two genetically engineered microbes, a cyanobacterium (Synechococcus elongatus PCC 7942) and a heterotrophic bacterium (Pseudomonas putida EM173). These microbial species specialize in the co-culture: cyanobacteria fix CO2 through photosynthetic metabolism and secrete sufficient carbohydrates to support the growth and active metabolism of P. putida, which has been engineered to consume sucrose and to degrade the environmental pollutant 2,4-dinitrotoluene (2,4-DNT). By encapsulating S. elongatus within a barium-alginate hydrogel, cyanobacterial cells were protected from the toxic effects of 2,4-DNT, enhancing the performance of the co-culture. The synthetic consortium was able to convert 2,4-DNT with light and CO2 as key inputs, and its catalytic performance was stable over time. Furthermore, cycling this synthetic consortium through low nitrogen medium promoted the sucrose-dependent accumulation of polyhydroxyalkanoate, an added-value biopolymer, in the engineered P. putida strain. Altogether, the synthetic consortium displayed the capacity to remediate the industrial pollutant 2,4-DNT while simultaneously synthesizing biopolymers using light and CO2 as the primary inputs.
Collapse
Affiliation(s)
- Derek T. Fedeson
- DOE‐MSU Plant Research LaboratoriesMichigan State UniversityEast LansingMIUSA
- Genetics ProgramMichigan State UniversityEast LansingMIUSA
| | - Pia Saake
- Heinrich‐Heine UniversitätDüsseldorfGermany
| | - Patricia Calero
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of DenmarkKgs LyngbyDenmark
| | - Pablo Iván Nikel
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of DenmarkKgs LyngbyDenmark
| | - Daniel C. Ducat
- DOE‐MSU Plant Research LaboratoriesMichigan State UniversityEast LansingMIUSA
- Genetics ProgramMichigan State UniversityEast LansingMIUSA
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMIUSA
| |
Collapse
|
8
|
Nieto-Domínguez M, Nikel PI. Intersecting Xenobiology and Neometabolism To Bring Novel Chemistries to Life. Chembiochem 2020; 21:2551-2571. [PMID: 32274875 DOI: 10.1002/cbic.202000091] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/09/2020] [Indexed: 12/19/2022]
Abstract
The diversity of life relies on a handful of chemical elements (carbon, oxygen, hydrogen, nitrogen, sulfur and phosphorus) as part of essential building blocks; some other atoms are needed to a lesser extent, but most of the remaining elements are excluded from biology. This circumstance limits the scope of biochemical reactions in extant metabolism - yet it offers a phenomenal playground for synthetic biology. Xenobiology aims to bring novel bricks to life that could be exploited for (xeno)metabolite synthesis. In particular, the assembly of novel pathways engineered to handle nonbiological elements (neometabolism) will broaden chemical space beyond the reach of natural evolution. In this review, xeno-elements that could be blended into nature's biosynthetic portfolio are discussed together with their physicochemical properties and tools and strategies to incorporate them into biochemistry. We argue that current bioproduction methods can be revolutionized by bridging xenobiology and neometabolism for the synthesis of new-to-nature molecules, such as organohalides.
Collapse
Affiliation(s)
- Manuel Nieto-Domínguez
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| | - Pablo I Nikel
- The Novo Nordisk Foundation Center for Biosustainability, Technical University of Denmark, 2800, Kongens Lyngby, Denmark
| |
Collapse
|
9
|
Batianis C, Kozaeva E, Damalas SG, Martín‐Pascual M, Volke DC, Nikel PI, Martins dos Santos VA. An expanded CRISPRi toolbox for tunable control of gene expression in Pseudomonas putida. Microb Biotechnol 2020; 13:368-385. [PMID: 32045111 PMCID: PMC7017828 DOI: 10.1111/1751-7915.13533] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 12/20/2019] [Accepted: 12/26/2019] [Indexed: 01/15/2023] Open
Abstract
Owing to its wide metabolic versatility and physiological robustness, together with amenability to genetic manipulations and high resistance to stressful conditions, Pseudomonas putida is increasingly becoming the organism of choice for a range of applications in both industrial and environmental applications. However, a range of applied synthetic biology and metabolic engineering approaches are still limited by the lack of specific genetic tools to effectively and efficiently regulate the expression of target genes. Here, we present a single-plasmid CRISPR-interference (CRISPRi) system expressing a nuclease-deficient cas9 gene under the control of the inducible XylS/Pm expression system, along with the option of adopting constitutively expressed guide RNAs (either sgRNA or crRNA and tracrRNA). We showed that the system enables tunable, tightly controlled gene repression (up to 90%) of chromosomally expressed genes encoding fluorescent proteins, either individually or simultaneously. In addition, we demonstrate that this method allows for suppressing the expression of the essential genes pyrF and ftsZ, resulting in significantly low growth rates or morphological changes respectively. This versatile system expands the capabilities of the current CRISPRi toolbox for efficient, targeted and controllable manipulation of gene expression in P. putida.
Collapse
Affiliation(s)
- Christos Batianis
- Laboratory of Systems and Synthetic BiologyWageningen & Research University6708WageningenThe Netherlands
| | - Ekaterina Kozaeva
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of Denmark2800Kgs. LyngbyDenmark
| | - Stamatios G. Damalas
- Laboratory of Systems and Synthetic BiologyWageningen & Research University6708WageningenThe Netherlands
| | - María Martín‐Pascual
- Laboratory of Systems and Synthetic BiologyWageningen & Research University6708WageningenThe Netherlands
| | - Daniel C. Volke
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of Denmark2800Kgs. LyngbyDenmark
| | - Pablo I. Nikel
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of Denmark2800Kgs. LyngbyDenmark
| | - Vitor A.P. Martins dos Santos
- Laboratory of Systems and Synthetic BiologyWageningen & Research University6708WageningenThe Netherlands
- Lifeglimmer GmbH12163BerlinGermany
| |
Collapse
|
10
|
Fernández‐Cabezón L, Cros A, Nikel PI. Evolutionary Approaches for Engineering Industrially Relevant Phenotypes in Bacterial Cell Factories. Biotechnol J 2019; 14:e1800439. [DOI: 10.1002/biot.201800439] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/08/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Lorena Fernández‐Cabezón
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of Denmark 2800 Kongens Lyngby Denmark
| | - Antonin Cros
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of Denmark 2800 Kongens Lyngby Denmark
| | - Pablo I. Nikel
- The Novo Nordisk Foundation Center for BiosustainabilityTechnical University of Denmark 2800 Kongens Lyngby Denmark
| |
Collapse
|
11
|
Sazykin I, Makarenko M, Khmelevtsova L, Seliverstova E, Rakin A, Sazykina M. Cyclohexane, naphthalene, and diesel fuel increase oxidative stress, CYP153, sodA, and recA gene expression in Rhodococcus erythropolis. Microbiologyopen 2019; 8:e00855. [PMID: 31119875 PMCID: PMC6816061 DOI: 10.1002/mbo3.855] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Revised: 04/13/2019] [Accepted: 04/16/2019] [Indexed: 12/27/2022] Open
Abstract
In this study, we compared the expression of CYP153, sodA, sodC, and recA genes and ROS generation in hydrocarbon-degrading Rhodococcus erythropolis in the presence of cyclohexane, naphthalene, and diesel fuel. The expression of cytochrome P450, sodA (encoding Fe/Mn superoxide dismutase), recA, and superoxide anion radical generation rate increased after the addition of all studied hydrocarbons. The peak of CYP153, sodA, and recA gene expression was registered in the presence of naphthalene. The same substrate upregulated the Cu/Zn superoxide dismutase gene, sodC. Cyclohexane generated the highest level of superoxide anion radical production. Hydrogen peroxide accumulated in the medium enriched with diesel fuel. Taken together, hydrocarbon biotransformation leads to oxidative stress and upregulation of antioxidant enzymes and CYP153 genes, and increases DNA reparation levels in R. erythropolis cells.
Collapse
Affiliation(s)
- Ivan Sazykin
- Southern Federal University, Rostov-on-Don, Russian Federation
| | | | | | | | - Alexander Rakin
- Institute for Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Jena, Germany
| | - Marina Sazykina
- Southern Federal University, Rostov-on-Don, Russian Federation
| |
Collapse
|