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Deng W, Takada Y, Nanasato Y, Kishida K, Stari L, Ohtsubo Y, Tabei Y, Watanabe M, Nagata Y. Transgenic Arabidopsis thaliana plants expressing bacterial γ-hexachlorocyclohexane dehydrochlorinase LinA. BMC Biotechnol 2024; 24:42. [PMID: 38898480 PMCID: PMC11186250 DOI: 10.1186/s12896-024-00867-0] [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: 02/25/2024] [Accepted: 06/05/2024] [Indexed: 06/21/2024] Open
Abstract
BACKGROUND γ-Hexachlorocyclohexane (γ-HCH), an organochlorine insecticide of anthropogenic origin, is a persistent organic pollutant (POP) that causes environmental pollution concerns worldwide. Although many γ-HCH-degrading bacterial strains are available, inoculating them directly into γ-HCH-contaminated soil is ineffective because of the low survival rate of the exogenous bacteria. Another strategy for the bioremediation of γ-HCH involves the use of transgenic plants expressing bacterial enzyme for γ-HCH degradation through phytoremediation. RESULTS We generated transgenic Arabidopsis thaliana expressing γ-HCH dehydrochlroninase LinA from bacterium Sphingobium japonicum strain UT26. Among the transgenic Arabidopsis T2 lines, we obtained one line (A5) that expressed and accumulated LinA well. The A5-derived T3 plants showed higher tolerance to γ-HCH than the non-transformant control plants, indicating that γ-HCH is toxic for Arabidopsis thaliana and that this effect is relieved by LinA expression. The crude extract of the A5 plants showed γ-HCH degradation activity, and metabolites of γ-HCH produced by the LinA reaction were detected in the assay solution, indicating that the A5 plants accumulated the active LinA protein. In some A5 lines, the whole plant absorbed and degraded more than 99% of γ-HCH (10 ppm) in the liquid medium within 36 h. CONCLUSION The transgenic Arabidopsis expressing active LinA absorbed and degraded γ-HCH in the liquid medium, indicating the high potential of LinA-expressing transgenic plants for the phytoremediation of environmental γ-HCH. This study marks a crucial step toward the practical use of transgenic plants for the phytoremediation of POPs.
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Affiliation(s)
- Wenhao Deng
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
| | - Yoshinobu Takada
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
| | - Yoshihiko Nanasato
- Forest Bio-Research Center, Forestry and Forest Products Research Institute (FFPRI), Forest Research and Management Organization (FRMO), 3809-1 Ishi, Juo, Hitachi, Ibaraki, 319-1301, Japan
| | - Kouhei Kishida
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
| | - Leonardo Stari
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
| | - Yoshiyuki Ohtsubo
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
| | - Yutaka Tabei
- Faculty of Food and Nutritional Sciences, Toyo University, 1-1-1 Izumino, Itakura-Machi, Ora-Gun, Gunma, 374-0193, Japan
| | - Masao Watanabe
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan
| | - Yuji Nagata
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, 980-8577, Japan.
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Yu F, Zhang B, Liu Y, Luo W, Chen H, Gao J, Ye X, Li J, Xie Q, Peng T, Wang H, Huang T, Hu Z. Biotransformation of HBCDs by the microbial communities enriched from mangrove sediments. JOURNAL OF HAZARDOUS MATERIALS 2024; 469:134036. [PMID: 38493623 DOI: 10.1016/j.jhazmat.2024.134036] [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: 11/15/2023] [Revised: 02/29/2024] [Accepted: 03/12/2024] [Indexed: 03/19/2024]
Abstract
1,2,5,6,9,10-Hexabromocyclododecanes (HBCDs) are a sort of persistent organic pollutants (POPs). This research investigated 12 microbial communities enriched from sediments of four mangroves in China to transform HBCDs. Six microbial communities gained high transformation rates (27.5-97.7%) after 12 generations of serial transfer. Bacteria were the main contributors to transform HBCDs rather than fungi. Analyses on the bacterial compositions and binning genomes showed that Alcanivorax (55.246-84.942%) harboring haloalkane dehalogenase genes dadAH and dadBH dominated the microbial communities with high transformation rates. Moreover, expressions of dadAH and dadBH in the microbial communities and Alcanivorax isolate could be induced by HBCDs. Further, it was found that purified proteins DadAH and DadBH showed high conversion rates on HBCDs in 36 h (91.9 ± 7.4 and 101.0 ± 1.8%, respectively). The engineered Escherichia coli BL21 strains harbored two genes could convert 5.7 ± 0.4 and 35.1 ± 0.1% HBCDs, respectively, lower than their cell-free crude extracts (61.2 ± 5.2 and 56.5 ± 8.7%, respectively). The diastereoisomer-specific transforming trend by both microbial communities and enzymes were γ- > α- > β-HBCD, differed from α- > β- > γ-HBCD by the Alcanivorax isolate. The identified transformation products indicated that HBCDs were dehalogenated via HBr elimination (dehydrobromination), hydrolytic and reductive debromination pathways in the enriched cultures. Two enzymes converted HBCDs via hydrolytic debromination. The present research provided theoretical bases for the biotransformation of HBCDs by microbial community and the bioremediation of HBCDs contamination in the environment.
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Affiliation(s)
- Fei Yu
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Bing Zhang
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Yongjin Liu
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Wenqi Luo
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Haonan Chen
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Jun'na Gao
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Xueying Ye
- School of Life Sciences, Huizhou University, Huizhou 516007, Guangdong Province, China
| | - Jin Li
- Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou 515063, Guangdong Province, China
| | - Qingyi Xie
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Tao Peng
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Hui Wang
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Tongwang Huang
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China
| | - Zhong Hu
- Department of Biology, College of Science, Shantou University, Shantou 515063, Guangdong Province, China.
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Yusuf Habibullah KO, Ito R, Stari L, Kishida K, Ohtsubo Y, Masai E, Fukuda M, Miyauchi K, Nagata Y. Degradation of DDT by γ-hexachlorocyclohexane dehydrochlorinase LinA. Biosci Biotechnol Biochem 2023; 88:123-130. [PMID: 37796901 DOI: 10.1093/bbb/zbad141] [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: 08/30/2023] [Accepted: 09/27/2023] [Indexed: 10/07/2023]
Abstract
1,1,1-Trichloro-2,2-bis(4-chlorophenyl)-ethane (DDT) is the first synthetic insecticide and one of the most widely used pesticides. The use of DDT has been banned, but it remains one of the most notorious environmental pollutants around the world. In this study, we found that γ-hexachlorocyclohexane (γ-HCH) dehydrochlorinase LinA from a γ-HCH-degrading bacterium, Sphingobium japonicum UT26, converts DDT to 1,1-dichloro-2,2-bis(4-chlorophenyl)-ethylene (DDE). Because of the weak DDT degradation activity of LinA, we could not detect such activity in UT26 cells expressing LinA constitutively. However, the linA-deletion mutant of UT26 harboring a plasmid for the expression of LinA, in which LinA was expressed at a higher level than UT26, showed the DDT degradation activity. This outcome highlights the potential for constructing DDT-degrading sphingomonad cells through elevated LinA expression.
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Affiliation(s)
| | - Ren Ito
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Leonardo Stari
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Kouhei Kishida
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Yoshiyuki Ohtsubo
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
| | - Eiji Masai
- Department of Materials Science and Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan
| | - Masao Fukuda
- Department of Science of Technology Innovation, Nagaoka University of Technology, Nagaoka, Niigata, Japan
| | - Keisuke Miyauchi
- Department of Civil and Environmental Engineering, Faculty of Engineering, Tohoku Gakuin University, Sendai, Japan
| | - Yuji Nagata
- Department of Molecular and Chemical Life Sciences, Graduate School of Life Sciences, Tohoku University, Sendai, Japan
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Yu F, Luo W, Xie W, Li Y, Liu Y, Ye X, Peng T, Wang H, Huang T, Hu Z. The effects of long-term hexabromocyclododecanes contamination on microbial communities in the microcosms. CHEMOSPHERE 2023; 325:138412. [PMID: 36925001 DOI: 10.1016/j.chemosphere.2023.138412] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 01/21/2023] [Accepted: 03/13/2023] [Indexed: 06/18/2023]
Abstract
The adaptation of microbial community to the long-term contamination of hexabromocyclododecanes (HBCDs) has not been well studied. Our previous study found that the HBCDs contamination in the microcosms constructed of sediments from two different mangrove forests in 8 months resulted in serious acidification (pH2-3). This study reanalyzed previous sequencing data and compared them with data after 20 months to investigate the adaptive properties of microbial communities in the stress of HBCDs and acidification. It hypothesized that the reassembly was based on the fitness of taxa. The results indicated that eukaryotes and fungi might have better adaptive capacity to these deteriorated habitats. Eukaryotic taxa Eufallia and Syncystis, and fungal taxa Wickerhamomyces were only detected after 20 months of contamination. Moreover, eukaryotic taxa Caloneis and Nitzschia, and fungal taxa Talaromyces were dominant in most of microbial communities (14.467-95.941%). The functional compositions were sediment-dependent and more divergent than community reassemblies. Network and co-occurrence analysis suggested that acidophiles such as Acidisoma and Acidiphilium were gaining more positive relations in the long-term stress. The acidophilic taxa and genes involved in resistance to the acidification and toxicity of HBCDs were enriched, for example, bacteria Acidisoma and Acidiphilium, archaea Thermogymnomonas, and eukaryotes Nitzschia, and genes kdpC, odc1, polA, gst, and sod-2. These genes involved in oxidative stress response, energy metabolism, DNA damage repair, potassium transportation, and decarboxylation. It suggested that the microbial communities might cope with the stress from HBCDs and acidification via multiple pathways. The present research shed light on the evolution of microbial communities under the long-term stress of HBCDs contamination and acidification.
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Affiliation(s)
- Fei Yu
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Wenqi Luo
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Wei Xie
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Yuyang Li
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Yongjin Liu
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Xueying Ye
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Tao Peng
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Hui Wang
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China
| | - Tongwang Huang
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China.
| | - Zhong Hu
- Department of Biology, College of Science, Shantou University, Shantou, Guangdong Province, China; Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou, Guangdong Province, China.
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Transformation of HBCDs by Rhodococcus sp. stu-38. Curr Microbiol 2022; 79:200. [PMID: 35596087 DOI: 10.1007/s00284-022-02872-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Accepted: 04/10/2022] [Indexed: 11/03/2022]
Abstract
1,2,5,6,9,10-Hexabromocyclododecanes (HBCDs) are brominated flame retardants causing serious environmental pollution. HBCDs in the environment could be transformed to various products. Identification of transformation products has been performed using various mass-spectrometric techniques. However, bacterial transformation of HBCDs yielding low-level products was not well studied. In this paper, a Rhodococcus strain stu-38 which could stereoselectively transform HBCDs in mineral salt medium, seawater, and growth medium was isolated. Seven potential biotransformation products of HBCDs were identified by using GC-MS. These products, including brominated alkenes, dibromocyclododecadiene and bromocyclododecatriene; brominated alkenols, bromocyclododecadienol and bromocyclododecatrienol; fully debrominated compounds, cyclododecadiendiol, 1,2-epoxy-5,9-cyclododecadiene, and cyclododecadienol, were presented in rather low level which could lead to false negative results. The low-level transformation products should not be ignored because their toxicity was less assessment. This research highlighted identification of the low-level transformation products to reveal the complicated stereoselective biotransformation of HBCDs.
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Liu Y, Ding Y, Song Y, Guo X. Enantioseparation and determination of orphenadrine in rat plasma and its application to a stereoselective pharmacokinetic study. NEW J CHEM 2021. [DOI: 10.1039/d0nj06005d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Chiral separation and stereoselective pharmacokinetics study of orphenadrine enantiomers in rats by HPLC-MS/MS.
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Affiliation(s)
- Yanru Liu
- School of Pharmacy, Shenyang Pharmaceutical University
- Shenyang
- P. R. China
| | - Yushan Ding
- School of Pharmacy, Shenyang Pharmaceutical University
- Shenyang
- P. R. China
| | - Yongbo Song
- School of Pharmacy, Shenyang Pharmaceutical University
- Shenyang
- P. R. China
| | - Xingjie Guo
- School of Pharmacy, Shenyang Pharmaceutical University
- Shenyang
- P. R. China
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