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Li S, Ying Z, Peng R, Zhou Y, Zhang S, Zhao J, Song S, Chen J, Ye J. Enhanced 1,2-dichloroethane removal using g-C 3N 4/Blue TiO 2 nanotube array photoanode in microbial photoelectrochemical cells. CHEMOSPHERE 2024; 363:142839. [PMID: 39019181 DOI: 10.1016/j.chemosphere.2024.142839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 07/10/2024] [Accepted: 07/11/2024] [Indexed: 07/19/2024]
Abstract
The compound 1,2-dichloroethane (1,2-DCA), a persistent and ubiquitous pollutant, is often found in groundwater and can strongly affect the ecological environment. However, the extreme bio-impedance of C-Cl bonds means that a high energy input is needed to drive biological dechlorination. Biotechnology techniques based on microbial photoelectrochemical cell (MPEC) could potentially convert solar energy into electricity and significantly reduce the external energy inputs currently needed to treat 1,2-DCA. However, low electricity-generating efficiency at the anode and sluggish bioreaction kinetics at the cathode limit the application of MPEC. In this study, a g-C3N4/Blue TiO2-NTA photoanode was fabricated and incorporated into an MPEC for 1,2-DCA removal. Optimal performance was achieved when Blue TiO2 nanotube arrays (Blue TiO2-NTA) were loaded with graphitic carbon nitride (g-C3N4) 10 times. The photocurrent density of the g-C3N4/Blue TiO2-NTA composite electrode was 2.48-fold higher than that of the pure Blue TiO2-NTA electrode under light irradiation. Furthermore, the MPEC equipped with g-C3N4/Blue TiO2-NTA improved 1,2-DCA removal efficiency by 45.21% compared to the Blue TiO2-NTA alone, which is comparable to that of a microbial electrolysis cell. In the modified MPEC, the current efficiency reached 69.07% when the light intensity was 150 mW cm-2 and the 1,2-DCA concentration was 4.4 mM. The excellent performance of the novel MPEC was attributed to the efficient direct electron transfer process and the abundant dechlorinators and electroactive bacteria. These results provide a sustainable and cost-effective strategy to improve 1,2-DCA treatment using a biocathode driven by a photoanode.
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Affiliation(s)
- Shaoyu Li
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Zanyun Ying
- Ningbo Key Laboratory of Agricultural Germplasm Resources Mining and Environmental Regulation, College of Science & Technology, Ningbo University, Ningbo, 315212, China
| | - Ruijian Peng
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Yu Zhou
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Shihan Zhang
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jingkai Zhao
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Shuang Song
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jianmeng Chen
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China; School of Environment and Natural Resources, Zhejiang University of Science & Technology, Hangzhou, 310023, China.
| | - Jiexu Ye
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
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Oubohssaine M, Sbabou L, Aurag J. Potential of the plant growth-promoting rhizobacterium Rhodococcus qingshengii LMR356 in mitigating lead stress impact on Sulla spinosissima L. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:46002-46022. [PMID: 38980484 DOI: 10.1007/s11356-024-34150-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 06/24/2024] [Indexed: 07/10/2024]
Abstract
Mining-related lead (Pb) pollution of the soil poses serious hazards to ecosystems and living organisms, including humans. Improved heavy metal phytoremediation efficacy, achieved by using phytostabilizing plants assisted by plant-growth-promoting (PGP) microorganisms, has been presented as an effective strategy for remediating polluted soils. The objective of this research was to examine the response and potential of the plant-growth-promoting bacterium LMR356, a Rhodococcus qingshengii strain isolated from an abandoned mining soil, under lead stress conditions. Compared to non-contaminated culture media, the presence of lead induced a significant decrease in auxin production (from 21.17 to 2.65 μg mL-1) and phosphate solubilization (from 33.60 to 8.22 mg L-1), whereas other PGP traits increased drastically, such as 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase activity (from 38.17 to 71.37 nmol mg-1 h-1 α-ketobutyrate), siderophore production (from 69 to 83%), exopolysaccharide production (from 1952.28 to 3637.72 mg mL-1), biofilm formation, and motility. We, therefore, investigated the behavior of Sulla spinosissima L. in the presence or absence of this strain under a variety of experimental conditions. Under hydroponic conditions, Sulla plants showed endurance to varying lead concentrations (500-1000 μM). Inoculation of plants with Rhodococcus qingshengii strain LMR356 enhanced plant tolerance, as demonstrated by the increase in plant biomass (ranging from 14.41 to 79.12%) compared to non-inoculated Pb-stressed and non-stressed control plants. Antioxidant enzyme activities (increasing by -42.71 to 126.8%) and chlorophyll (383.33%) and carotenoid (613.04%) content were also augmented. In addition to its impact on plant lead tolerance, strain LMR356 showed a growth-promoting effect on Sulla plants when cultivated in sterilized non-contaminated sand. Parameters such as plant biomass (16.57%), chlorophyll (24.14%), and carotenoid (30%) contents, as well as ascorbate peroxidase (APX), peroxidase (POD), and catalase (CAT) activities, were all elevated compared to non-inoculated plants. Furthermore, when the same plant species was cultivated in highly polluted soil, inoculation increased plant biomass and improved its physiological properties. These findings demonstrate that LMR356 is a phytobeneficial bacterial strain capable of enhancing Sulla growth under normal conditions and improving its heavy metal tolerance in multi-polluted soils. Thus, it can be considered a promising biofertilizer candidate for growing Sulla spinosissima L. or other selected plants intended for application in restoration and stabilization initiatives aimed at reviving and safeguarding environmentally compromised and polluted soils after mining activities.
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Affiliation(s)
- Malika Oubohssaine
- Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, 10000, Rabat, Morocco.
| | - Laila Sbabou
- Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, 10000, Rabat, Morocco
| | - Jamal Aurag
- Microbiology and Molecular Biology Team, Center of Plant and Microbial Biotechnology, Biodiversity and Environment, Faculty of Sciences, Mohammed V University in Rabat, Avenue Ibn Battouta, BP 1014, 10000, Rabat, Morocco
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3
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Maucourt F, Doumèche B, Nazaret S, Fraissinet-Tachet L. Under explored roles of microbial ligninolytic enzymes in aerobic polychlorinated biphenyl transformation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:19071-19084. [PMID: 38372925 DOI: 10.1007/s11356-024-32291-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Accepted: 01/28/2024] [Indexed: 02/20/2024]
Abstract
Polychlorinated biphenyls (PCBs) are persistent organic pollutants in the environment that are responsible for many adverse health effects. Bioremediation appears to be a healthy and cost-effective alternative for remediating PCB-contaminated environments. While some microbial species have been observed to be capable of transforming PCBs, only two different microbial pathways (rdh and bph pathways) have been described to be involved in PCB transformations. Ligninolytic enzymes have been observed or are under suspicion in some microbial PCB transformations. However, the role of these promising PCB-transforming enzymes, which are produced by fungi and some aerobic bacteria, is still unclear. The present review describes their role by identifying microbial PCB-transforming species and their reported ligninolytic enzymes whether proven or suspected to be involved in PCB transformations. There are several lines of evidence that ligninolytic enzymes are responsible for PCB transformations such as (1) the ability of purified laccases from Myceliophthora thermophila, Pycnoporus cinnabarinus, Trametes versicolor, Cladosporium sp, and Coprinus cumatus to transform hydroxy-PCBs; (2) the increased production of laccases and peroxidases by many fungi in the presence of PCBs; and (3) the enhanced PCB transformation by Pseudomonas stutzeri and Sinorhizobium meliloti NM after the addition of ligninolytic enzyme enhancers. However, if the involvement of ligninolytic enzymes in PCB transformation is clearly demonstrated in some fungal species, it does not seem to be implicated in all microbial species suggesting other still unknown metabolic pathways involved in PCB transformation and different from the bph and rdh pathways. Therefore, PCB transformation may involve several metabolic pathways, some involving ligninolytic enzymes, bph or rdh genes, and some still unknown, depending on the microbial species. In addition, current knowledge does not fully clarify the role of ligninolytic enzymes in PCB oxidation and dechlorination. Therefore, further studies focusing on purified ligninolytic enzymes are needed to clearly elucidate their role in PCB transformation.
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Affiliation(s)
- Flavien Maucourt
- Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-7 69622, Villeurbanne, France
- ENVISOL, 2-4 rue Hector Berlioz, F-38110, La Tour du Pin, France
| | - Bastien Doumèche
- Université de Lyon, Université Claude Bernard Lyon 1, CNRS 5246 ICBMS, F-7 69622, Villeurbanne, France
| | - Sylvie Nazaret
- Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-7 69622, Villeurbanne, France
| | - Laurence Fraissinet-Tachet
- Université Claude Bernard Lyon 1, CNRS, INRAE, VetAgro Sup, UMR Ecologie Microbienne, F-7 69622, Villeurbanne, France.
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Guo L, Li Z, Xu J. Effects of Cadmium Stress on Bacterial and Fungal Communities in the Whitefly Bemisia tabaci. Int J Mol Sci 2023; 24:13588. [PMID: 37686394 PMCID: PMC10488276 DOI: 10.3390/ijms241713588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 08/23/2023] [Accepted: 08/31/2023] [Indexed: 09/10/2023] Open
Abstract
Heavy metal contamination is among the most prominent environmental problems in China, posing serious threats to both ecosystem and human health. Among the diverse heavy metal contaminants, cadmium is the most serious. The whitefly Bemisia tabaci is a cosmopolitan pest capable of causing severe damage to a broad range of agricultural crops, especially vegetables. At present, little is known about the effects of cadmium stress on B. tabaci, including on its bacterial and fungal communities. In the current study, we investigated the effects of cadmium on bacterial and fungal communities in whiteflies. Meta-barcode sequencing of the 16S rRNA gene revealed that the whitefly bacterial community contained 264 operational taxonomic units (OTUs) belonging to 201 known genera and 245 known species. The top five most frequent bacterial genera were Rickettsia, Rhodococcus, Candidatus Portiera, Candidatus Hamiltonella, and Achromobacter. Meta-barcode sequencing of the fungal ITS locus revealed that the whitefly fungal community contained 357 OTUs belonging to 187 known genera and 248 known species. The top five most frequent fungal genera were Wallemia, unclassified_f_Dipodascaceae, Apiotrichum, Penicillium, and unclassified_o_Saccharomycetales. Cadmium exposure reduced the fungal OTU richness but increased the bacterial Shannon and Simpson diversity indices in whiteflies. In addition, upon exposure to cadmium, the microbial community composition in whiteflies changed significantly, with increased prevalence of the bacterial genera Rhodococcus and Exiguobacterium and fungal genus Wallemia. Our results indicate that the whitefly microbiota likely contributed to their adaptation and resistance to cadmium and suggested that whiteflies may contain microbes that could help remediate cadmium contamination in natural environments and agricultural fields.
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Affiliation(s)
- Litao Guo
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (L.G.); (Z.L.)
| | - Zhimin Li
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China; (L.G.); (Z.L.)
| | - Jianping Xu
- Department of Biology, McMaster University, Hamilton, ON L8S 4K1, Canada
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Ma J, Zhuang Y, Wang Y, Zhu N, Wang T, Xiao H, Chen J. Update on new trend and progress of the mechanism of polycyclic aromatic hydrocarbon biodegradation by Rhodococcus, based on the new understanding of relevant theories: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:93345-93362. [PMID: 37548784 DOI: 10.1007/s11356-023-28894-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Accepted: 07/17/2023] [Indexed: 08/08/2023]
Abstract
Rapid industrial and societal developments have led to substantial increases in the use and exploitation of petroleum, and petroleum hydrocarbon pollution has become a serious threat to human health and the environment. Polycyclic aromatic hydrocarbons (PAHs) are primary components of petroleum hydrocarbons. In recent years, microbial remediation of PAHs pollution has been regarded as the most promising and cost-effective treatment measure because of its low cost, robust efficacy, and lack of secondary pollution. Rhodococcus bacteria are regarded as one of main microorganisms that can effectively degrade PAHs because of their wide distribution, broad degradation spectrum, and network-like evolution of degradation gene clusters. In this review, we focus on the biological characteristics of Rhodococcus; current trends in PAHs degradation based on knowledge maps; and the cellular structural, biochemical, and enzymatic basis of degradation mechanisms, along with whole genome and transcriptional regulation. These research advances provide clues for the prospects of Rhodococcus-based applications in environmental protection.
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Affiliation(s)
- Jinglin Ma
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China
- Orthopaedics Key Laboratory of Gansu Province, Lanzhou University Second Hospital, Lanzhou, 730030, China
| | - Yan Zhuang
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Yonggang Wang
- School of Life Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Ning Zhu
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China
| | - Ting Wang
- The Second Clinical Medical College, Lanzhou University, Lanzhou, 730030, China
| | - Hongbin Xiao
- The Second Clinical Medical College, Lanzhou University, Lanzhou, 730030, China
| | - Jixiang Chen
- School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China.
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6
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Li Y, Zhang C, Kong K, Yan X. Characterization and Biological Activities of Four Biotransformation Products of Diosgenin from Rhodococcus erythropolis. Molecules 2023; 28:molecules28073093. [PMID: 37049855 PMCID: PMC10096415 DOI: 10.3390/molecules28073093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2023] [Revised: 03/11/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
Diosgenin (DSG), a steroidal sapogenin derived from the tuberous roots of yam, possesses multiple biological properties. DSG has been widely used as a starting material for the industrial production of steroid drugs. Despite its significant pharmacological activities, moderate potency and low solubility hinder the medicinal application of DSG. Biotransformation is an efficient method to produce valuable derivatives of natural products. In this work, we performed the biotransformation of DSG using five Rhodococcus strains. Compounds 1–4 were isolated and identified from Rhodococcus erythropolis. Compounds 1 and 2 showed potent cytotoxicity against the A549, MCF-7, and HepG2 cell lines. Compounds 3 and 4 are novel entities, and each possesses a terminal carboxyl group attached to the spiroacetal ring. Remarkably, 4 exhibited significant cell protective effects for kidney, liver, and vascular endothelial cells, suggesting the therapeutic potential of this compound in chronic renal diseases, atherosclerosis, and hypertension. We further optimized the fermentation conditions aiming to increase the titer of compound 4. Finally, the yield of compound 4 was improved by 2.9-fold and reached 32.4 mg/L in the optimized conditions. Our study lays the foundation for further developing compound 4 as a cell protective agent.
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Affiliation(s)
- Yanjie Li
- State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
- Haihe Laboratory of Modern Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Chengyu Zhang
- State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
- Haihe Laboratory of Modern Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Kexin Kong
- State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
| | - Xiaohui Yan
- State Key Laboratory of Component-Based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
- Haihe Laboratory of Modern Chinese Medicine, 10 Poyanghu Road, Jinghai District, Tianjin 301617, China
- Correspondence:
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7
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Han Z, Lin Q, Zhang S, Zhou X, Li S, Sun F, Shen C, Su X. High PCBs mineralization capability of a resuscitated strain Bacillus sp. LS1 and its survival in PCB-contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159224. [PMID: 36206912 DOI: 10.1016/j.scitotenv.2022.159224] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/30/2022] [Accepted: 09/30/2022] [Indexed: 06/16/2023]
Abstract
Polychlorinated biphenyl (PCB)-degrading strains resuscitated by resuscitation promoting factor (Rpf) enlarged pure degraders to screen effective bio-inoculants for soil bioaugmentation. In this study, whole-genome analysis and PCB-degrading performance of a resuscitated strain LS1 were investigated. Importantly, the persistence and the physiological response of soil-inoculated LS1 were checked. The results indicate that the Bacillus sp. strain LS1 possessed the potential to degrade polycyclic aromatic compounds. LS1 exhibited better performance in degrading PCBs 18 and 52, but lower PCB 77 degradation capability. At PCBs concentration of 10 mg/L, the degradation efficiencies of PCBs 18, 52 and 77 within 96 h were 62.8 %, 59.6 % and 39.8 %, respectively. Combined the bph genes and metabolites detected, as well as the genes found in the genome, the abilities of LS1 for oxidative dehalogenation and mineralization of PCBs via HOPDA-benzoate-protocatechuate-β-ketoadipate pathway were determined. Notably, LS1 can still maintain survival and culturable state after inoculation into PCB-contaminated soil for 70 days. This is the first report to demonstrate the fate of resuscitated strain when used as soil bio-inoculant, which revealed the necessity and feasibility of using resuscitated strains to enhance bioremediation of PCB-contaminated soils.
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Affiliation(s)
- Zhen Han
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China
| | - Qihua Lin
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China
| | - Shusheng Zhang
- The Management Center of Wuyanling National Natural Reserve in Zhejiang, Wenzhou 325500, China
| | - Xinru Zhou
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China
| | - Si Li
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China
| | - Faqian Sun
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China
| | - Chaofeng Shen
- Department of Environmental Engineering, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xiaomei Su
- College of Geography and Environmental Science, Zhejiang Normal University, Jinhua 321004, China.
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Dutta N, Usman M, Ashraf MA, Luo G, Zhang S. A critical review of recent advances in the bio-remediation of chlorinated substances by microbial dechlorinators. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100359] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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9
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Wu R, Zhang S, Wang S. Development and microbial characterization of Bio-RD-PAOP for effective remediation of polychlorinated biphenyls. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129190. [PMID: 35739720 DOI: 10.1016/j.jhazmat.2022.129190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 05/02/2022] [Accepted: 05/17/2022] [Indexed: 06/15/2023]
Abstract
Polychlorinated biphenyls (PCBs) as typical halogenated persistent organic pollutants are widely distributed in natural environments, and can be enriched and magnified in organisms via food webs. It is consequently urgent and necessary to develop techniques to completely remove these persistent organohalides. In this study, we developed a process (Bio-RD-PAOP) by integrating microbial reductive dechlorination (Bio-RD) with subsequent persulfate activation and oxidation process (PAOP) for effective remediation of PCBs. Results showed the synergistic combination of advantages of Bio-RD and PAOP in dechlorination of higher-chlorinated PCBs and of PAOP in degradation/mineralization of lower-chlorinated PCBs, respectively. For the PAOP, both experimental evidences and theoretical calculations suggested that degradation rate and efficiency decreased with the increased PCB chlorine numbers. Relative to the Bio-RD and PAOP, Bio-RD-PAOP had significantly higher PCB removal efficiencies, of which values were PCB congener-specific. For example, removal efficiency of Bio-RD-PAOP in removing PCB88 is 2.50 and 1.86 times of that of Bio-RD and PAOP, respectively. In contrast, the efficiency is 1.66 and 3.35 times of Bio-RD and PAOP, respectively, for PCB180 removal. The PAOP-derived oxidizing species (mainly sulfate free radical) significantly decreased microbial abundance, particularly of the organohalide-respiring Dehalococcoides. Notably, co-existence of other microorganisms alleviated the inhibitive effect of oxidizing species on the Dehalococcoides, possibly due to formation of microbial flocs or biofilm. This study provided a promising strategy for extensive remediation of organohalide-contaminated sites, as well as new insight into impact of PAOP-derived oxidizing species on the organohalide-respiring community.
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Affiliation(s)
- Rifeng Wu
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou 510006, China
| | - Shangwei Zhang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou 510006, China
| | - Shanquan Wang
- Environmental Microbiomics Research Center, School of Environmental Science and Engineering, Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Sun Yat-Sen University, Guangzhou 510006, China.
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10
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Ines P, Vlasta D, Sanja F, Ana BK, Dubravka H, Fabrice ML, Nikolina UK. Unraveling metabolic flexibility of rhodococci in PCB transformation. CHEMOSPHERE 2021; 282:130975. [PMID: 34111638 DOI: 10.1016/j.chemosphere.2021.130975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/17/2021] [Accepted: 05/21/2021] [Indexed: 06/12/2023]
Abstract
Even though the genetic attributes suggest presence of multiple degradation pathways, most of rhodococci are known to transform PCBs only via regular biphenyl (bph) pathway. Using GC-MS analysis, we monitored products formed during transformation of 2,4,4'-trichlorobiphenyl (PCB-28), 2,2',5,5'-tetrachlorobiphenyl (PCB-52) and 2,4,3'-trichlorobiphenyl (PCB-25) by previously characterized PCB-degrading rhodococci Z6, T6, R2, and Z57, with the aim to explore their metabolic pleiotropy in PCB transformations. A striking number of different transformation products (TPs) carrying a phenyl ring as a substituent, both those generated as a part of the bph pathway and an array of unexpected TPs, implied a curious transformation ability. We hypothesized that studied rhodococcal isolates, besides the regular one, use at least two alternative pathways for PCB transformation, including the pathway leading to acetophenone formation (via 3,4 (4,5) dioxygenase attack on the molecule), and a third sideway pathway that includes stepwise oxidative decarboxylation of the aliphatic side chain of the 2-hydroxy-6-oxo-6-phenylhexa-2,4-dienoate. Structure of the identified chlorinated benzoic acids and acetophenones allowed us to hypothesize that the first two pathways were the outcome of a ring-hydroxylating dioxygenase with the ability to attack both the 2,3 (5,6) and the 3,4 (4,5) positions of the biphenyl ring as well as dechlorination activity at both, -ortho and -para positions. We propose that several TPs produced by the bph pathway could have caused the triggering of the third sideway pathway. In conclusion, this study proposed ability of rhodococci to use different strategies in PCB transformation, which allows them to circumvent potential negative aspect of TPs on the overall transformation pathway.
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Affiliation(s)
- Petrić Ines
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Zagreb, Croatia.
| | - Drevenkar Vlasta
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | - Fingler Sanja
- Institute for Medical Research and Occupational Health, Zagreb, Croatia
| | | | - Hršak Dubravka
- Ruđer Bošković Institute, Division for Marine and Environmental Research, Zagreb, Croatia
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11
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Dai ZL, Yang WL, Fan ZX, Guo L, Liu ZH, Dai YJ. Actinomycetes Rhodococcus ruber CGMCC 17550 degrades neonicotinoid insecticide nitenpyram via a novel hydroxylation pathway and remediates nitenpyram in surface water. CHEMOSPHERE 2021; 270:128670. [PMID: 33109355 DOI: 10.1016/j.chemosphere.2020.128670] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 09/30/2020] [Accepted: 10/16/2020] [Indexed: 06/11/2023]
Abstract
Neonicotinoid insecticides are neurotoxicants that cause serious environmental pollution and ecosystem risks. In the present study, a nitenpyram-degrading bacterium, Rhodococcus ruber CGMCC 17550, was isolated from a nitenpyram production sewage treatment tank. Liquid chromatography-mass spectrometry analysis revealed R. ruber degraded nitenpyram via a novel hydroxylation pathway to form three different metabolites, one of which was confirmed to hydroxylate nitenpyram at the C3 site of the 6-chlorpyridine cycle by nuclear magnetic resonance analysis. The nitenpyram degradation rate increased as the biomass of resting R. ruber CGMCC 17550 cells increased, reaching 98.37% at an OD600 of 9 in transformation broth containing 100 mg L-1 nitenpyram after 72 h of incubation. Nitenpyram degradation by R. ruber CGMCC 17550 was insensitive to dissolved oxygen levels. Use of glucose, fructose and pyruvate as co-substrates slightly increased nitenpyram degradation. The cytochrome P450 inhibitor 1-aminobenzotriazole strongly inhibited nitenpyram degradation, indicating that P450 enzymes may mediate nitenpyram hydroxylation. Inoculation of R. ruber CGMCC 17550 enhanced nitenpyram degradation in surface water. Additionally, R. ruber cells immobilized by calcium-alginate remediated 87.11% of 100 mg L-1 NIT in 8 d. Genome sequencing analysis confirmed that R. ruber CGMCC 17550 has metabolic diversity and abundant KEGG genes involved in xenobiotics biodegradation and metabolism. These findings demonstrate that R. ruber CGMCC 17550 is capable of unique biodegradation of nitenpyram via the hydroxylation pathway and is a promising bacterium for bioremediation of contaminants.
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Affiliation(s)
- Zhi-Ling Dai
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
| | - Wen-Long Yang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
| | - Zhi-Xia Fan
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
| | - Ling Guo
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
| | - Zhong-Hua Liu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
| | - Yi-Jun Dai
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Science, Nanjing Normal University, Nanjing, 210023, People's Republic of China.
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12
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Peng L, Wang Y, Yang B, Qin Q, Song E, Song Y. Polychlorinated biphenyl quinone regulates MLKL phosphorylation that stimulates exosome biogenesis and secretion via a short negative feedback loop. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 274:115606. [PMID: 33190980 DOI: 10.1016/j.envpol.2020.115606] [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: 06/15/2020] [Revised: 08/06/2020] [Accepted: 09/01/2020] [Indexed: 06/11/2023]
Abstract
Polychlorinated biphenyls (PCBs) are one of the most refractory organic environmental pollutants that ubiquitous existence in nature. Due to the polymorphism of their metabolic pathway and corresponding downstream metabolites, PCBs' toxicities are complicated and need extended investigation. In the present study, we discovered a novel regulatory mechanism of PCB quinone metabolite-driven programmed cell death (PCD), namely, necroptosis. We first confirmed that PCB quinone induces cancerous HeLa and MDA-MB-231 cells necroptosis via the phosphorylation of mixed lineage kinase domain-like MLKL (p-MLKL). Then, we found that PCB quinone-stimulated p-MLKL enhances exosome biogenesis and secretion. Exosome interacts with p-MLKL and releases p-MLKL to the outside of the cell, and ultimately alleviating PCB quinone-induced necroptosis. The inhibition of exosome secretion by GW4869 significantly elevated necroptotic level, indicating the establishment of a short negative feedback loop of MLKL-exosome secretion upon PCB quinone challenge. Since exosome-mediated signaling showed great implications in various human diseases, this work may provide a new mechanism for PCBs-associated toxicity.
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Affiliation(s)
- Lu Peng
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Yawen Wang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Bingwei Yang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Qi Qin
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Erqun Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Yang Song
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China.
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Khalid F, Hashmi MZ, Jamil N, Qadir A, Ali MI. Microbial and enzymatic degradation of PCBs from e-waste-contaminated sites: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:10474-10487. [PMID: 33411303 DOI: 10.1007/s11356-020-11996-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 12/07/2020] [Indexed: 05/21/2023]
Abstract
Electronic waste is termed as e-waste and on recycling it produces environmental pollution. Among these e-waste pollutants, polychlorinated biphenyls (PCBs) are significantly important due to ubiquitous, organic in nature and serious health and environmental hazards. PCBs are used in different electrical equipment such as in transformers and capacitors for the purposes of exchange of heat and hydraulic fluids. Bioremediation is a reassuring technology for the elimination of the PCBs from the environment. In spite of their chemical stability, there are several microbes which can bio-transform or mineralize the PCBs aerobically or anaerobically. In this review paper, our objective was to summarize the information regarding PCB-degrading enzymes and microbes. The review suggested that the most proficient PCB degraders during anaerobic condition are Dehalobacter, Dehalococcoides, and Desulfitobacterium and in aerobic condition are Burkholderia, Achromobacter, Comamonas, Ralstonia, Pseudomonas, Bacillus, and Alcaligenes etc., showing the broadest substrate among bacterial strains. Enzymes found in soil such as dehydrogenases and fluorescein diacetate (FDA) esterases have the capability to breakdown PCBs. Biphenyl upper pathway involves four enzymes: dehydrogenase (bphB), multicomponent dioxygenase (bphA, E, F, and G), second dioxygenase (bphC), hydrolase, and (bphD). Biphenyl dioxygenase is considered as the foremost enzyme used for aerobic degradation of PCBs in metabolic pathway. It has been proved that several micro-organisms are responsible for the PCB metabolization. The review provides novel strategies for e-waste-contaminated soil management.
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Affiliation(s)
- Foqia Khalid
- College of Earth and Environmental Science, University of the Punjab, Lahore, Pakistan
| | - Muhammad Zaffar Hashmi
- Department of Chemistry, COMSATS University Islamabad, Islamabad, 44000, Pakistan.
- Pakistan Academy of Science, 3-Constitution Avenue Sector G-5/2, Islamabad, Pakistan.
| | - Nadia Jamil
- College of Earth and Environmental Science, University of the Punjab, Lahore, Pakistan
| | - Abdul Qadir
- College of Earth and Environmental Science, University of the Punjab, Lahore, Pakistan
| | - Muhammad Ishtiaq Ali
- Department of Microbiology, Quaid-i-Azam University Islamabad, Islamabad, Pakistan
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14
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Pátek M, Grulich M, Nešvera J. Stress response in Rhodococcus strains. Biotechnol Adv 2021; 53:107698. [PMID: 33515672 DOI: 10.1016/j.biotechadv.2021.107698] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 01/13/2021] [Accepted: 01/15/2021] [Indexed: 12/13/2022]
Abstract
Rhodococci are bacteria which can survive under various extreme conditions, in the presence of toxic compounds, and in other hostile habitats. Their tolerance of unfavorable conditions is associated with the structure of their cell wall and their large array of enzymes, which degrade or detoxify harmful compounds. Their physiological and biotechnological properties, together with tools for their genetic manipulation, enable us to apply them in biotransformations, biodegradation and bioremediation. Many such biotechnological applications cause stresses that positively or negatively affect their efficiency. Whereas numerous reviews on rhodococci described their enzyme activities, the optimization of degradation or production processes, and corresponding technological solutions, only a few reviews discussed some specific effects of stresses on the physiology of rhodococci and biotechnological processes. This review aims to comprehensively describe individual stress responses in Rhodococcus strains, the interconnection of different types of stresses and their consequences for cell physiology. We examine here the responses to (1) environmental stresses (desiccation, heat, cold, osmotic and pH stress), (2) the presence of stress-inducing compounds (metals, organic compounds and antibiotics) in the environment (3) starvation and (4) stresses encountered during biotechnological applications. Adaptations of the cell envelope, the formation of multicellular structures and stresses induced by the interactions of hosts with pathogenic rhodococci are also included. The roles of sigma factors of RNA polymerase in the global regulation of stress responses in rhodococci are described as well. Although the review covers a large number of stressful conditions, our intention was to provide an overview of the selected stress responses and their possible connection to biotechnological processes, not an exhaustive survey of the scientific literature. The findings on stress responses summarized in this review and the demonstration of gaps in current knowledge may motivate researchers working to fill these gaps.
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Affiliation(s)
- Miroslav Pátek
- Institute of Microbiology of the CAS, v. v. i., Prague, Czech Republic.
| | - Michal Grulich
- Institute of Microbiology of the CAS, v. v. i., Prague, Czech Republic.
| | - Jan Nešvera
- Institute of Microbiology of the CAS, v. v. i., Prague, Czech Republic.
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15
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Recent advances in the biodegradation of polychlorinated biphenyls. World J Microbiol Biotechnol 2020; 36:145. [PMID: 32862310 DOI: 10.1007/s11274-020-02922-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 08/22/2020] [Indexed: 12/22/2022]
Abstract
Polychlorinated biphenyls (PCBs) are typical lasting organic pollutants. Persistence and recalcitrance to biodegradation of PCBs have hampered the transformation of PCB congeners from the environment. Biological transformation of polychlorinated biphenyls could take place through anaerobic dechlorination, aerobic microbial degradation, and a combination of transformation of anaerobic dechlorination and aerobic degradation. Under anaerobic conditions, microbial dechlorination is an important degradation mode for PCBs, especially high-chlorinated congeners. The low-chlorinated compounds formed after reductive dechlorination could be further aerobically degraded and completely mineralized. This paper reviews the recent advances in biological degradation of PCBs, introduces the functional bacteria and enzymes involved in the anaerobic and aerobic degradation of PCBs, and discusses the synergistic action of anaerobic reduction and aerobic degradation. In addition, the different ways to the microbial remediation of PCBs-contaminated environments are discussed. This review provides a theoretical foundation and practical basis to use PCBs-degrading microorganisms for bioremediation.
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16
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He J, Chen Y, Dai L, Yao J, Mei Y, Hrynsphan D, Tatsiana S, Chen J. Rapid and Complete Biodegradation of Acrylic Acid by a Novel Strain Rhodococcus ruber JJ-3: Kinetics, Carbon Balance, and Degradation Pathways. BIOTECHNOL BIOPROC E 2020. [DOI: 10.1007/s12257-019-0465-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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17
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Ma Y, Li L, Awasthi MK, Tian H, Lu M, Megharaj M, Pan Y, He W. Time-course transcriptome analysis reveals the mechanisms of Burkholderia sp. adaptation to high phenol concentrations. Appl Microbiol Biotechnol 2020; 104:5873-5887. [PMID: 32415321 DOI: 10.1007/s00253-020-10672-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 04/28/2020] [Accepted: 05/05/2020] [Indexed: 01/02/2023]
Abstract
Microbial tolerance to phenolic pollutants is the key to their efficient biodegradation. However, the metabolic mechanisms that allow some microorganisms to adapt to high phenol concentrations remain unclear. In this study, to reveal the underlying mechanisms of how Burkholderia sp. adapt to high phenol concentrations, the strain's tolerance ability and time-course transcriptome in combination with cell phenotype were evaluated. Surprisingly, Burkholderia sp. still grew normally after a long adaptation to a relatively high phenol concentration (1500 mg/L) and exhibited some time-dependent changes compared to unstressed cells prior to the phenol addition. Time-course transcriptome analysis results revealed that the mechanism of adaptations to phenol was an evolutionary process that transitioned from tolerance to positive degradation through precise gene regulation at appropriate times. Specifically, basal stress gene expression was upregulated and contributed to phenol tolerance, which involved stress, DNA repair, membrane, efflux pump and antioxidant protein-coding genes, while a phenol degradation gene cluster was specifically induced. Interestingly, both the catechol and protocatechuate branches of the β-ketoadipate pathway contributed to the early stage of phenol degradation, but only the catechol branch was used in the late stage. In addition, pathways involving flagella, chemotaxis, ATP-binding cassette transporters and two-component systems were positively associated with strain survival under phenolic stress. This study provides the first insights into the specific response of Burkholderia sp. to high phenol stress and shows potential for application in remediation of polluted environments. KEY POINTS: • Shock, DNA repair and antioxidant-related genes contributed to phenol tolerance. • β-Ketoadipate pathway branches differed at different stages of phenol degradation. • Adaptation mechanisms transitioned from negative tolerance to positive degradation.
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Affiliation(s)
- Yinghui Ma
- Microbiology Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an, 710043, Shaanxi, PR China.,College of Natural Resources and Environment, Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Lijun Li
- Microbiology Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an, 710043, Shaanxi, PR China.
| | - Mukesh Kumar Awasthi
- College of Natural Resources and Environment, Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Haixia Tian
- College of Natural Resources and Environment, Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China
| | - Meihuan Lu
- Microbiology Institute of Shaanxi, Shaanxi Academy of Sciences, Xi'an, 710043, Shaanxi, PR China
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation, Faculty of Science, University of Newcastle, University Drive, Callaghan, NSW, 2308, Australia
| | - Yalei Pan
- Shaanxi Collaborative Innovation Center of Chinese Medicine Resources Industrialization, Shaanxi University of Chinese Medicine, Xianyang, 712046, PR China
| | - Wenxiang He
- College of Natural Resources and Environment, Key Laboratory of Plant Nutrition and Agro-environment in Northwest China, Ministry of Agriculture, Northwest A&F University, Yangling, 712100, Shaanxi, PR China.
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18
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Zhu L, Zhou J, Zhang R, Tang X, Wang J, Li Y, Zhang Q, Wang W. Degradation mechanism of biphenyl and 4-4'-dichlorobiphenyl cis-dihydroxylation by non-heme 2,3 dioxygenases BphA: A QM/MM approach. CHEMOSPHERE 2020; 247:125844. [PMID: 32069708 DOI: 10.1016/j.chemosphere.2020.125844] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Revised: 12/19/2019] [Accepted: 01/03/2020] [Indexed: 06/10/2023]
Abstract
Biphenyl 2,3-dioxygenase (BphA), a Rieske-type and first enzyme in the aerobic degradation process, plays a key role in the metabolizing process of biphenyl/polychlorinated biphenyl aromatic pollutants in the environment. To understand the catalytic mechanism of biphenyl 2,3-dioxygenase, the conversions leading to the cis-diols are investigated by means of quantum mechanics/molecular mechanics (QM/MM) method. A hydroperoxo-iron (III) species is involved in the enzyme-catalyzed reaction. Herein, we explored the direct reaction mechanism of hydroperoxo-iron (III) species with biphenyl and 4-4'-dichlorobiphenyl. The reaction process involves an epoxide intermediate, it could develop into a carbocation intermediate, and ultimately evolve into a cis-diol product. The important roles of several residues during the dioxygenation process were highlighted. This study may provide theoretical support for further directed mutations and enzymatic engineering of BphA, as well as promote the development of degrading environmentally persistent biphenyl/polychlorinated biphenyl aromatic contaminants.
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Affiliation(s)
- Ledong Zhu
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China
| | - Jie Zhou
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China
| | - Ruiming Zhang
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China
| | - Xiaowen Tang
- School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, 510006, PR China
| | - Junjie Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China
| | - Yanwei Li
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China
| | - Qingzhu Zhang
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China.
| | - Wenxing Wang
- Environment Research Institute, Shandong University, Qingdao, 266237, PR China
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19
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Sun S, Wang H, Fu B, Zhang H, Lou J, Wu L, Xu J. Non-bioavailability of extracellular 1-hydroxy-2-naphthoic acid restricts the mineralization of phenanthrene by Rhodococcus sp. WB9. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 704:135331. [PMID: 31831232 DOI: 10.1016/j.scitotenv.2019.135331] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/30/2019] [Accepted: 10/31/2019] [Indexed: 06/10/2023]
Abstract
Rhodococcus sp. WB9, a strain isolated from polycyclic aromatic hydrocarbons contaminated soil, degraded phenanthrene (PHE, 100 mg L-1) completely within 4 days. 18 metabolites were identified during PHE degradation, including 5 different hydroxyphenanthrene compounds resulted from multiple routes of initial monooxygenase attack. Initial dioxygenation dominantly occurred on 3,4-C positions, followed by meta-cleavage to form 1-hydroxy-2-naphthoic acid (1H2N). More than 95.2% of 1H2N was transported to and kept in extracellular solution without further degradation. However, intracellular 1H2N was converted to 1,2-naphthalenediol that was branched to produce salicylate and phthalate. Furthermore, 131 genes in strain WB9 genome were related to aromatic hydrocarbons catabolism, including the gene coding for salicylate 1-monooxygenase that catalyzed the oxidation of 1H2N to 1,2-naphthalenediol, and complete gene sets for the transformation of salicylate and phthalate toward tricarboxylic acid (TCA) cycle. Metabolic and genomic analyses reveal that strain WB9 has the ability to metabolize intracellular 1H2N to TCA cycle intermediates, but the extracellular 1H2N can't enter the cells, restricting 1H2N bioavailability and PHE mineralization.
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Affiliation(s)
- Shanshan Sun
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Haizhen Wang
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China.
| | - Binxin Fu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Hao Zhang
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
| | - Jun Lou
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Science, Huzhou University, Huzhou 313000, China
| | - Laosheng Wu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China; Department of Environmental Sciences, University of California, Riverside, CA 92521, USA
| | - Jianming Xu
- Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou 310058, China
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20
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Steliga T, Wojtowicz K, Kapusta P, Brzeszcz J. Assessment of Biodegradation Efficiency of Polychlorinated Biphenyls (PCBs) and Petroleum Hydrocarbons (TPH) in Soil Using Three Individual Bacterial Strains and Their Mixed Culture. Molecules 2020; 25:E709. [PMID: 32041368 PMCID: PMC7036857 DOI: 10.3390/molecules25030709] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 01/31/2023] Open
Abstract
Biodegradation is one of the most effective and profitable methods for the elimination of toxic polychlorinated biphenyls (PCBs) and total petroleum hydrocarbons (TPH) from the environment. In this study, aerobic degradation of the mentioned pollutants by bacterial strains Mycolicibacterium frederiksbergense IN53, Rhodococcus erythropolis IN129, and Rhodococcus sp. IN306 and mixed culture M1 developed based on those strains at 1:1:1 ratio was analyzed. The effectiveness of individual strains and of the mixed culture was assessed based on carried out respirometric tests and chromatographic analyses. The Rhodococcus sp. IN306 turned out most effective in terms of 18 PCB congeners biodegradation (54.4%). The biodegradation index was decreasing with an increasing number of chlorine atoms in a molecule. Instead, the Mycolicobacterium frederiksbergense IN53 was the best TPH degrader (37.2%). In a sterile soil, contaminated with PCBs and TPH, the highest biodegradation effectiveness was obtained using inoculation with mixed culture M1, which allowed to reduce both the PCBs (51.8%) and TPH (34.6%) content. The PCBs and TPH biodegradation capacity of the defined mixed culture M1 was verified ex-situ with prism method in a non-sterile soil polluted with aged petroleum hydrocarbons (TPH) and spent transformer oil (PCBs). After inoculation with mixed culture M1, the PCBs were reduced during 6 months by 84.5% and TPH by 70.8% as well as soil toxicity was decreased.
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Affiliation(s)
- Teresa Steliga
- Department of Reservoir Fluid Production Technology, Oil and Gas Institute–National Research Institute, ul. Lubicz 25 A, 31-503 Krakow, Poland;
| | - Katarzyna Wojtowicz
- Department of Reservoir Fluid Production Technology, Oil and Gas Institute–National Research Institute, ul. Lubicz 25 A, 31-503 Krakow, Poland;
| | - Piotr Kapusta
- Department of Microbiology, Oil and Gas Institute-National Research Institute, ul. Lubicz 25 A, 31-503 Krakow, Poland; (P.K.); (J.B.)
| | - Joanna Brzeszcz
- Department of Microbiology, Oil and Gas Institute-National Research Institute, ul. Lubicz 25 A, 31-503 Krakow, Poland; (P.K.); (J.B.)
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21
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Ni J, Liu Y, Shen C, Chen D, Xin Y, Liu Q. Bioinformatics, bacterial expression and enzyme activity analyses of dichloromethane dehalogenase from Methylobacterium rhodesianum H13. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1818622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Jianguo Ni
- Department of Environmental Engineering, College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, Zhejiang, PR China
- Department of Linpu Environmental Protection, Hangzhou Ecological Environment Bureau of Xiaoshan Branch, Hangzhou, Zhejiang, PR China
| | - Ying Liu
- Department of Environmental Engineering, College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, Zhejiang, PR China
| | - Chenjia Shen
- Department of Environmental Engineering, College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, Zhejiang, PR China
| | - Dongzhi Chen
- Department of Environmental Engineering, College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang, PR China
| | - Yueyong Xin
- Department of Environmental Engineering, College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, Zhejiang, PR China
| | - Qi Liu
- Department of Environmental Engineering, College of Life and Environmental Science, Hangzhou Normal University, Hangzhou, Zhejiang, PR China
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22
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Stiborova H, Strejcek M, Musilova L, Demnerova K, Uhlik O. Diversity and phylogenetic composition of bacterial communities and their association with anthropogenic pollutants in sewage sludge. CHEMOSPHERE 2020; 238:124629. [PMID: 31524607 DOI: 10.1016/j.chemosphere.2019.124629] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 07/31/2019] [Accepted: 08/19/2019] [Indexed: 05/23/2023]
Abstract
Despite wastewater treatment, sewage sludge is often contaminated with multiple pollutants. Their impact on the phylogenetic composition and diversity of prokaryotic communities in sludge samples remains largely unknown. In this study, we analyzed the phylogenetic structure of bacterial communities and diversity in sludge from six waste water treatment plants (WWTPs) and linked this information with the pollutants identified in these samples: eight potentially toxic metals (PTMs) and four groups of organic pollutants [polychlorinated biphenyls (PCBs), polyromantic hydrocarbons (PAHs), brominated flame retardants (BFRs) and organochlorine pesticides (OCPs)]. Alpha diversity measures and the distribution of dominant phyla varied among the samples, with the community from the thermophilic anaerobic digestion (TAD)-stabilized sample from Prague being the least rich and the least diverse and containing on average 36% of 16S rRNA gene sequence reads of the thermotolerant genus Coprothermobacter of the class Clostridia (phylum Firmicutes). Using weighted UniFrac distance-based redundancy analysis (dbRDA), we found that a collection of 5 PTMs: Cr, Cu, Ni, Pb, Zn, and a pair of BFRs: hexabromocyclododecane (HBCD) and tribromodiphenyl ethers (triBDEs) were significantly associated with the bacterial community structure in mesophilic anaerobic digestion (MAD)-stabilized samples, whereas PCBs were observed to be marginally significant. Altogether, 85% of the variance in bacterial community structure could be ascribed to these pollutants. The data presented here contribute to a greater understanding of the ecological effects of combined pollution on the composition and diversity of bacterial communities, hence have the potential to aid in predicting ecosystem functions and/or disruptions associated with pollution.
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Affiliation(s)
- Hana Stiborova
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Prague, Czech Republic.
| | - Michal Strejcek
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Prague, Czech Republic
| | - Lucie Musilova
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Prague, Czech Republic
| | - Katerina Demnerova
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Prague, Czech Republic
| | - Ondrej Uhlik
- University of Chemistry and Technology, Prague, Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, Prague, Czech Republic
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Solyanikova IP, Emelyanova EV, Shumkova ES, Travkin VM. Pathways of 3-Chlorobenzoate Degradation by Rhodococcus opacus strains 1CP and 6a. Microbiology (Reading) 2019. [DOI: 10.1134/s002626171905014x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Wang Y, Shao H, Zhu S, Tian K, Qiu Q, Huo H. Degradation of 17β-estradiol and products by a mixed culture of Rhodococcus equi DSSKP-R-001 and Comamonas testosteroni QYY20150409. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2019.1568913] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Affiliation(s)
- Yu Wang
- College of Life Sciences, Northeast Normal University, Jilin, PR China
| | - Huanhuan Shao
- College of Environment, Northeast Normal University, Jilin, PR China
| | - Suiyi Zhu
- College of Environment, Northeast Normal University, Jilin, PR China
| | - Kejian Tian
- College of Environment, Northeast Normal University, Jilin, PR China
| | - Qing Qiu
- College of Life Sciences, Northeast Normal University, Jilin, PR China
| | - Hongliang Huo
- College of Environment, Northeast Normal University, Jilin, PR China
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Jiang L, Luo C, Zhang D, Song M, Sun Y, Zhang G. Biphenyl-Metabolizing Microbial Community and a Functional Operon Revealed in E-Waste-Contaminated Soil. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8558-8567. [PMID: 29733586 DOI: 10.1021/acs.est.7b06647] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Primitive electronic waste (e-waste) recycling activities release massive amounts of persistent organic pollutants (POPs) and heavy metals into surrounding soils, posing a major threat to the ecosystem and human health. Microbes capable of metabolizing POPs play important roles in POPs remediation in soils, but their phylotypes and functions remain unclear. Polychlorinated biphenyls (PCBs), one of the main pollutants in e-waste contaminated soils, have drawn increasing attention due to their high persistence, toxicity, and bioaccumulation. In the present study, we employed the culture-independent method of DNA stable-isotope probing to identify active biphenyl and PCB degraders in e-waste-contaminated soil. A total of 19 rare operational taxonomic units and three dominant bacterial genera ( Ralstonia, Cupriavidus, and uncultured bacterium DA101) were enriched in the 13C heavy DNA fraction, confirming their functions in PCBs metabolism. Additionally, a 13.8 kb bph operon was amplified, containing a bphA gene labeled by 13C that was concentrated in the heavy DNA fraction. The tetranucleotide signature characteristics of the bph operon suggest that it originated from Ralstonia. The bph operon may be shared by horizontal gene transfer because it contains a transposon gene and is found in various bacterial species. This study gives us a deeper understanding of PCB-degrading mechanisms and provides a potential resource for the bioremediation of PCBs-contaminated soils.
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Affiliation(s)
- Longfei Jiang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
| | - Chunling Luo
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
- College of Natural Resources and Environment , South China Agricultural University , Guangzhou 510642 , China
| | - Dayi Zhang
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Mengke Song
- College of Natural Resources and Environment , South China Agricultural University , Guangzhou 510642 , China
| | - Yingtao Sun
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
| | - Gan Zhang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
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