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Lashani E, Moghimi H, J Turner R, Amoozegar MA. Selenite bioreduction by a consortium of halophilic/halotolerant bacteria and/or yeasts in saline media. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023:121948. [PMID: 37270053 DOI: 10.1016/j.envpol.2023.121948] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Revised: 05/18/2023] [Accepted: 05/31/2023] [Indexed: 06/05/2023]
Abstract
Selenium oxyanions are released into environments by natural and anthropogenic activities and are present in agricultural and glass manufacturing wastewater in several locations worldwide. Excessive amounts of this metalloid have adverse effects on the health of living organisms. Halophilic and halotolerant microorganisms were selected for selenium oxyanions remediation due to presence of significant amount of salt in selenium-containing wastewater. Effects of aeration, carbon sources, competitive electron acceptors, and reductase inhibitors were investigated on SeO32- bio-removal. Additionally, NO3--containing wastewater were exploited to investigate SeO32- remediation in synthetic agricultural effluents. The results showed that the SeO32- removal extent is maximum in aerobic conditions with succinate as a carbon source. SO42- and PO43- do not significantly interfere with SeO32- reduction, while WO42- and TeO32- decrease the SeO32- removal percentage (up to 35 and 37%, respectively). Furthermore, NO3- had an adverse effect on SeO32- biotransformation by our consortia. All consortia reduced SeO32- in synthetic agricultural wastewaters with a 45-53% removal within 120 h. This study suggests that consortia of halophilic/halotolerant bacteria and yeasts could be applied to treat SeO32--contaminated drainage water. In addition, sulphates, and phosphates do not interfere with selenite bioreduction by these consortia, which makes them suitable candidates for the bioremediation of selenium-containing wastewater.
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Affiliation(s)
- Elham Lashani
- Extremophiles Laboratory, Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Hamid Moghimi
- Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
| | - Raymond J Turner
- Microbial Biochemistry Laboratory, Department of Biological Sciences, University of Calgary, 2500 University Dr. NW, Calgary, AB, T2N 1N4, Canada
| | - Mohammad Ali Amoozegar
- Extremophiles Laboratory, Department of Microbiology, School of Biology, College of Science, University of Tehran, Tehran, Iran
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2
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Liu S, Wei W, Wang J, Chen T. Theranostic applications of selenium nanomedicines against lung cancer. J Nanobiotechnology 2023; 21:96. [PMID: 36935493 PMCID: PMC10026460 DOI: 10.1186/s12951-023-01825-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/18/2023] [Indexed: 03/21/2023] Open
Abstract
The incidence and mortality rates of lung cancer are among the highest in the world. Traditional treatment methods include surgery, chemotherapy, and radiotherapy. Although rapid progress has been achieved in the past decade, treatment limitations remain. It is therefore imperative to identify safer and more effective therapeutic methods, and research is currently being conducted to identify more efficient and less harmful drugs. In recent years, the discovery of antitumor drugs based on the essential trace element selenium (Se) has provided good prospects for lung cancer treatments. In particular, compared to inorganic Se (Inorg-Se) and organic Se (Org-Se), Se nanomedicine (Se nanoparticles; SeNPs) shows much higher bioavailability and antioxidant activity and lower toxicity. SeNPs can also be used as a drug delivery carrier to better regulate protein and DNA biosynthesis and protein kinase C activity, thus playing a role in inhibiting cancer cell proliferation. SeNPs can also effectively activate antigen-presenting cells to stimulate cell immunity, exert regulatory effects on innate and regulatory immunity, and enhance lung cancer immunotherapy. This review summarizes the application of Se-based species and materials in lung cancer diagnosis, including fluorescence, MR, CT, photoacoustic imaging and other diagnostic methods, as well as treatments, including direct killing, radiosensitization, chemotherapeutic sensitization, photothermodynamics, and enhanced immunotherapy. In addition, the application prospects and challenges of Se-based drugs in lung cancer are examined, as well as their forecasted future clinical applications and sustainable development.
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Affiliation(s)
- Shaowei Liu
- Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China
| | - Weifeng Wei
- Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China
| | - Jinlin Wang
- Pulmonary and Critical Care Medicine, Guangzhou Institute of Respiratory Health, National Clinical Research Center for Respiratory Disease, National Center for Respiratory Medicine, State Key Laboratory of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510120, China.
| | - Tianfeng Chen
- College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, 510632, China.
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Wang Z, Wang Y, Gomes RL, Gomes HI. Selenium (Se) recovery for technological applications from environmental matrices based on biotic and abiotic mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:128122. [PMID: 34979385 DOI: 10.1016/j.jhazmat.2021.128122] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 12/08/2021] [Accepted: 12/17/2021] [Indexed: 06/14/2023]
Abstract
Selenium (Se) is an essential element with application in manufacturing from food to medical industries. Water contamination by Se is of concern due to anthropogenic activities. Recently, Se remediation has received increasing attention. Hence, different types of remediation techniques are listed in this work, and their potential for Se recovery is evaluated. Sorption, co-precipitation, coagulation and precipitation are effective for low-cost Se removal. In photocatalytic, zero-valent iron and electrochemical systems, the above mechanisms occur with reduction as an immobilization and detoxification process. In combination with magnetic separation, the above techniques are promising for Se recovery. Biological Se oxyanions reduction has been widely recognized as a cost-effective method for Se remediation, simultaneously generating biosynthetic Se nanoparticles (BioSeNPs). Increasing the extracellular production of BioSeNPs and controlling their morphology will benefit its recovery. However, the mechanism of the microbial production of BioSeNPs is not well understood. Se containing products from both microbial reduction and abiotic methods need to be refined to obtain pure Se. Eco-friendly and cost-effective Se refinery methods need to be developed. Overall, this review offers insight into the necessity of shifting attention from Se remediation to Se recovery.
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Affiliation(s)
- Zhongli Wang
- Food Water Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom.
| | - Yanming Wang
- Sustainable Process Technologies Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Rachel L Gomes
- Food Water Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
| | - Helena I Gomes
- Food Water Waste Research Group, Faculty of Engineering, University of Nottingham, University Park, Nottingham NG7 2RD, United Kingdom
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Zhou Y, Bastida F, Liu Y, Liu Y, Xiao Y, Song P, Wang T, Li Y. Selenium fertigation with nanobubbles influences soil selenium residual and plant performance by modulation of bacterial community. JOURNAL OF HAZARDOUS MATERIALS 2022; 423:127114. [PMID: 34537638 DOI: 10.1016/j.jhazmat.2021.127114] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 08/13/2021] [Accepted: 08/31/2021] [Indexed: 06/13/2023]
Abstract
Although selenium (Se) is an essential microelement for humans and animals, it is a potentially toxic element due to its bioaccumulation potential. In this study, Se fertilizer was supplied in a greenhouse vegetable (cucumber) plantation using an innovative system consisting of nanobubbles (NB_Se) and compared to that under conventional conditions of fertigation (C_Se) with six doses. The results revealed that NB_Se significantly reduced soil Se accumulation (38%-144%) and increased cucumber Se content compared with the C_Se treatments at the same Se dose. NB_Se significantly lowered the soil bacterial diversity, with an initial increase and then decrease with the Se doses. Bacterial associations and potential keystone taxa also differed between the NB_Se and C_Se. The greater abundance of oxidizing bacteria (indicated by the function composition of bacterial community) and the improved soil redox environment created by NBs sustained more available Se for plants, leading to a reduction in soil Se residual and an increase in the plant Se content. Our results highlight the feasibility and efficiency of NB_Se and demonstrate the important implications of Se for the maintenance of soil health and sustainability.
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Affiliation(s)
- Yunpeng Zhou
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Felipe Bastida
- CEBAS-CSIC, Department of Soil and Water Conservation, Campus Universitario de Espinardo, 30100 Murcia, Spain
| | - Yanzheng Liu
- College of Mechanical and Electrical Engineering, Beijing Vocational College of Agriculture, 102208, China
| | - Yaxin Liu
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Yang Xiao
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Peng Song
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Tianze Wang
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing 100083, China
| | - Yunkai Li
- College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Engineering Research Center for Agricultural Water-Saving and Water Resources, Ministry of Education, China Agricultural University, Beijing 100083, China.
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Laslo V, Pinzaru SC, Zaguła G, Kluz M, Vicas SI, Cavalu S. Synergic effect of selenium nanoparticles and lactic acid bacteria in reduction cadmium toxicity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131325] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Biosynthesis of selenoproteins by Saccharomyces cerevisiae and characterization of its antioxidant activities. Int J Biol Macromol 2020; 164:3438-3445. [PMID: 32828892 DOI: 10.1016/j.ijbiomac.2020.08.144] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 08/05/2020] [Accepted: 08/18/2020] [Indexed: 11/20/2022]
Abstract
The study investigated biosynthesis of selenoproteins by Saccharomyces. cerevisiae using inorganic selenium. Selenium supplement via two stages was carried out during fermentation and the physicochemical characteristics of selenoproteins and its antioxidant activities were examined through in vitro assessment procedures. After fermentation, dry cells weight (7.47 g/L) and selenium content (3079.60 μg/kg) in the yeast were achieved when fermentation time points at the 6th hour and the 9th hour were chosen to supplement 30% and 70% of 30 μg/mL Na2SeO3 respectively. A maximal yield of selenium content in selenoproteins reached 1013.07 μg/g under optimized culture conditions and was 133-fold higher than the control. One new band with molecular weight of 26.76 KDa appeared in conjugated selenoproteins of sodium dodecyl sulphate-polyacrylamide gel electrophoresis. Surface structure of selenoproteins and the control was different by Scanning electron microscopy images. Infrared spectrometry analysis demonstrated that groups of HSe, SeO and C-Se-O involved in selenoproteins were important pieces of evidence showing presence of Se embedded in the protein molecule. Selenoproteins showed strong antioxidant activities on DPPH·, OH and ·O2-, which was much higher than the control proteins. Therefore, the study provided an efficient selenium-enriched culture method of inorganic selenite to organic selenium and basis for selenoproteins applications.
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7
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Schiavon M, Nardi S, dalla Vecchia F, Ertani A. Selenium biofortification in the 21 st century: status and challenges for healthy human nutrition. PLANT AND SOIL 2020; 453:245-270. [PMID: 32836404 PMCID: PMC7363690 DOI: 10.1007/s11104-020-04635-9] [Citation(s) in RCA: 81] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/06/2020] [Indexed: 05/04/2023]
Abstract
BACKGROUND Selenium (Se) is an essential element for mammals and its deficiency in the diet is a global problem. Plants accumulate Se and thus represent a major source of Se to consumers. Agronomic biofortification intends to enrich crops with Se in order to secure its adequate supply by people. SCOPE The goal of this review is to report the present knowledge of the distribution and processes of Se in soil and at the plant-soil interface, and of Se behaviour inside the plant in terms of biofortification. It aims to unravel the Se metabolic pathways that affect the nutritional value of edible plant products, various Se biofortification strategies in challenging environments, as well as the impact of Se-enriched food on human health. CONCLUSIONS Agronomic biofortification and breeding are prevalent strategies for battling Se deficiency. Future research addresses nanosized Se biofortification, crop enrichment with multiple micronutrients, microbial-integrated agronomic biofortification, and optimization of Se biofortification in adverse conditions. Biofortified food of superior nutritional quality may be created, enriched with healthy Se-compounds, as well as several other valuable phytochemicals. Whether such a food source might be used as nutritional intervention for recently emerged coronavirus infections is a relevant question that deserves investigation.
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Affiliation(s)
- Michela Schiavon
- Dipartimento di Agronomia, Animali, Alimenti, Risorse naturali e Ambiente (DAFNAE), Università di Padova, Viale dell’Università 16, 35020 Legnaro, PD Italy
| | - Serenella Nardi
- Dipartimento di Agronomia, Animali, Alimenti, Risorse naturali e Ambiente (DAFNAE), Università di Padova, Viale dell’Università 16, 35020 Legnaro, PD Italy
| | | | - Andrea Ertani
- Dipartimento di Scienze Agrarie, Università di Torino, Via Leonardo da Vinci, 44, 10095 Grugliasco, TO Italy
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Chandramohan S, Sundar K, Muthukumaran A. Hollow selenium nanoparticles from potato extract and investigation of its biological properties and developmental toxicity in zebrafish embryos. IET Nanobiotechnol 2019; 13:275-281. [PMID: 31053690 PMCID: PMC8676351 DOI: 10.1049/iet-nbt.2018.5228] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 10/03/2018] [Accepted: 11/15/2018] [Indexed: 11/19/2022] Open
Abstract
A facile synthesis of hollow selenium nanoparticles (hSeNPs) was prepared using potato starch as a reducing and capping agent. The morphological and structural characters of the hSeNPs were characterised by ultraviolet-visible spectroscopy (UV), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectroscopy (EDX) and zeta potential analyser. The optical characteristics of hSeNPs were confirmed by UV. The presence of various functional groups in the hSeNPs suspension was confirmed by FTIR. The SEM results suggested that the synthesised hSeNPs were uniformly distributed and circular in shape with a hollow. The average size of the hSeNPs was found to be around 115 nm. The EDX analysis also confirmed the presence of hSeNPs in the sample. The zebrafish embryos were treated with hSeNPs of various concentrations ranging from 10 to 50 µg/ml. Abnormalities such as improper heartbeat, embryo sac oedema, ocular oedema and head oedema were noted at higher concentrations (30-50 µg/ml). A concentration-dependent antioxidant activity of hSeNPs was observed. The hSeNPs showed good antibacterial activity against gram-positive Bacillus subtilis and gram-negative Escherichia coli. The results of this study indicate that potato extract reduces the toxicity of hSeNPs and lower concentrations of hSeNPs could be used for various biomedical applications in near future.
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Affiliation(s)
- Subburaman Chandramohan
- Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil, TN 626126, India
| | - Krishnan Sundar
- International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil, TN 626126, India
| | - Azhaguchamy Muthukumaran
- International Research Centre, Kalasalingam Academy of Research and Education, Krishnankoil, TN 626126, India.
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9
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Selenium reduction by a defined co-culture of Shigella fergusonii strain TB42616 and Pantoea vagans strain EWB32213-2. Bioprocess Biosyst Eng 2019; 42:1343-1351. [DOI: 10.1007/s00449-019-02134-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 04/21/2019] [Indexed: 10/26/2022]
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10
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Ali J, Ali N, Wang L, Waseem H, Pan G. Revisiting the mechanistic pathways for bacterial mediated synthesis of noble metal nanoparticles. J Microbiol Methods 2019; 159:18-25. [PMID: 30797020 DOI: 10.1016/j.mimet.2019.02.010] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 02/18/2019] [Accepted: 02/19/2019] [Indexed: 10/27/2022]
Abstract
Synthesis and application of reliable nanoscale materials is a progressive domain and the limelight of modern nanotechnology. Conventional physicochemical approaches for the synthesis of metal nanoparticles have become obsolete owing to costly and hazardous materials. There is a need to explore alternative, cost-effective and eco-friendly strategies for fabrication of nanoparticle (NPs). Green synthesis of noble metal nanoparticles has emerged as a promising approach in the last decade. Elucidation of the molecular mechanism is highly essential in the biological synthesis of noble metal nanoparticles (NPs) for the controlled size, shape, and monodispersity. Moreover, mechanistic insights will help to scale up the facile synthesis protocols and will enable biotransformation of toxic heavy metals hence also providing the detoxification effects. Therefore, the current review article has primarily targeted the mechanisms involved in the green synthesis of metal NPs, which have been reported during the last few years. Detailed mechanistic pathways have highlighted nitrate reductase as a principle reducing agent in the bacterial mediated synthesis and stabilization of NPs. Furthermore, we have highlighted the potential implications of these mechanisms in bioremediation and biomineralization processes, which can play a critical role in biogeochemical cycling and environmental impacts of heavy metals. We anticipate that this review article will help researchers to address the challenges of bioremediation and modern nanotechnology.
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Affiliation(s)
- Jafar Ali
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Naeem Ali
- Department of Microbiology, Quaid-i-Azam University Islamabad, Pakistan.
| | - Lei Wang
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China
| | - Hassan Waseem
- Department of Microbiology, Quaid-i-Azam University Islamabad, Pakistan
| | - Gang Pan
- Key Laboratory of Environmental Nanotechnology and Health Effects, Research Center for Eco-environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Beijing 100085, PR China; School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Brackenhurst Campus, NG25 0QF, UK.
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Wadgaonkar SL, Nancharaiah YV, Esposito G, Lens PNL. Environmental impact and bioremediation of seleniferous soils and sediments. Crit Rev Biotechnol 2018; 38:941-956. [DOI: 10.1080/07388551.2017.1420623] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Yarlagadda V. Nancharaiah
- Biofouling and Biofilm Processes Section of Water and Steam Chemistry Division, Bhabha Atomic Research Centre, Kalpakkam, Tamil Nadu, India
- Homi Bhabha National Institute, Anushakti Nagar Complex, Mumbai, Maharashtra, India
| | - Giovanni Esposito
- Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Cassino, FR, Italy
| | - Piet N. L. Lens
- UNESCO IHE Institute for Water Education, Delft, The Netherlands
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Shoeibi S, Mozdziak P, Golkar-Narenji A. Biogenesis of Selenium Nanoparticles Using Green Chemistry. Top Curr Chem (Cham) 2017; 375:88. [PMID: 29124492 DOI: 10.1007/s41061-017-0176-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 10/30/2017] [Indexed: 12/18/2022]
Abstract
Selenium binds some enzymes such as glutathione peroxidase and thioredoxin reductase, which may be activated in biological infections and oxidative stress. Chemical and physical methods for synthesizing nanoparticles, apart from being expensive, have their own particular risks. However, nanoparticle synthesis through green chemistry is a safe procedure that different biological sources such as bacteria, fungi, yeasts, algae and plants can be the catalyst bed for processing. Synthesis of selenium nanoparticles (SeNPs) by macro/microorganisms causes variation in morphology and shape of the particles is due to diversity of reduction enzymes in organisms. Reducing enzymes of microorganisms by changing the status of redox convert metal ions (Se2-) to SeNPs without charge (Se0). Biological activity of SeNPs includes their protective role against DNA oxidation. Because of the biological and industrial properties, SeNPs have wide applications in the fields of medicine, microelectronic, agriculture and animal husbandry. SeNPs can show strong antimicrobial effects on the growth and proliferation of microorganisms in a dose-dependent manner. The objective of this review is to consider SeNPs applications to various organisms.
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Affiliation(s)
- Sara Shoeibi
- Cellular and Molecular Research Center, School of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.
| | - Paul Mozdziak
- Graduate Physiology Program, North Carolina State University, Raleigh, NC, USA
| | - Afsaneh Golkar-Narenji
- Department of Genetic, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran
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Estevam EC, Griffin S, Nasim MJ, Denezhkin P, Schneider R, Lilischkis R, Dominguez-Alvarez E, Witek K, Latacz G, Keck C, Schäfer KH, Kieć-Kononowicz K, Handzlik J, Jacob C. Natural selenium particles from Staphylococcus carnosus: Hazards or particles with particular promise? JOURNAL OF HAZARDOUS MATERIALS 2017; 324:22-30. [PMID: 26897703 DOI: 10.1016/j.jhazmat.2016.02.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 01/26/2016] [Accepted: 02/01/2016] [Indexed: 06/05/2023]
Abstract
Various bacteria, including diverse Staphylococci, reduce selenite to yield red selenium particles with diameters in the high nanometer to low micrometer range. Formation and accumulation of such particles in bacteria often results in cell death, triggered by a loss of thiols and formation of disruptive deposits inside the cell. Hence certain pathogenic bacteria are rather sensitive to the presence of selenite, whilst other organisms, such as small nematodes, do not employ this kind of nanotechnology, yet become affected by micromolar concentrations of such naturally generated materials. Selenium particles extracted from cultures of Staphylococcus carnosus and apparently stabilized by their natural protein coating, for instance, show considerable activity against the nematode Steinernema feltiae, Escherichia coli and Saccaromyces cerevisiae. Such natural nano- and micro-particles are also more active than mechanically generated selenium particles and may be applied as antimicrobial materials in Medicine and Agriculture.
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Affiliation(s)
| | - Sharoon Griffin
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbuecken, Germany; Applied Pharmacy Division, University of Applied Sciences, Kaiserslautern, 66953 Pirmasens, Germany; Department of Biotechnology, University of Applied Sciences, Kaiserslautern, 66482 Zweibruecken, Germany
| | - Muhammad Jawad Nasim
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbuecken, Germany
| | - Polina Denezhkin
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbuecken, Germany
| | - Ramona Schneider
- Applied Pharmacy Division, University of Applied Sciences, Kaiserslautern, 66953 Pirmasens, Germany
| | - Rainer Lilischkis
- Department of Information Technology and Microsystem Technology, University of Applied Sciences, Kaiserslautern, 66482 Zweibruecken, Germany
| | - Enrique Dominguez-Alvarez
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Cracow, Poland
| | - Karolina Witek
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Cracow, Poland
| | - Gniewomir Latacz
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Cracow, Poland
| | - Cornelia Keck
- Applied Pharmacy Division, University of Applied Sciences, Kaiserslautern, 66953 Pirmasens, Germany
| | - Karl-Herbert Schäfer
- Department of Biotechnology, University of Applied Sciences, Kaiserslautern, 66482 Zweibruecken, Germany
| | - Katarzyna Kieć-Kononowicz
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Cracow, Poland
| | - Jadwiga Handzlik
- Department of Technology and Biotechnology of Drugs, Faculty of Pharmacy, Jagiellonian University, Medical College, ul. Medyczna 9, 30-688 Cracow, Poland
| | - Claus Jacob
- Division of Bioorganic Chemistry, School of Pharmacy, Saarland University, D-66123 Saarbuecken, Germany.
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14
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Jeevanandam J, Chan YS, Danquah MK. Biosynthesis of Metal and Metal Oxide Nanoparticles. CHEMBIOENG REVIEWS 2016. [DOI: 10.1002/cben.201500018] [Citation(s) in RCA: 137] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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15
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Ni TW, Staicu LC, Nemeth RS, Schwartz CL, Crawford D, Seligman JD, Hunter WJ, Pilon-Smits EAH, Ackerson CJ. Progress toward clonable inorganic nanoparticles. NANOSCALE 2015; 7:17320-7. [PMID: 26350616 PMCID: PMC4785824 DOI: 10.1039/c5nr04097c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Pseudomonas moraviensis stanleyae was recently isolated from the roots of the selenium (Se) hyperaccumulator plant Stanleya pinnata. This bacterium tolerates normally lethal concentrations of SeO3(2-) in liquid culture, where it also produces Se nanoparticles. Structure and cellular ultrastructure of the Se nanoparticles as determined by cellular electron tomography shows the nanoparticles as intracellular, of narrow dispersity, symmetrically irregular and without any observable membrane or structured protein shell. Protein mass spectrometry of a fractionated soluble cytosolic material with selenite reducing capability identified nitrite reductase and glutathione reductase homologues as NADPH dependent candidate enzymes for the reduction of selenite to zerovalent Se nanoparticles. In vitro experiments with commercially sourced glutathione reductase revealed that the enzyme can reduce SeO3(2-) (selenite) to Se nanoparticles in an NADPH-dependent process. The disappearance of the enzyme as determined by protein assay during nanoparticle formation suggests that glutathione reductase is associated with or possibly entombed in the nanoparticles whose formation it catalyzes. Chemically dissolving the nanoparticles releases the enzyme. The size of the nanoparticles varies with SeO3(2-) concentration, varying in size form 5 nm diameter when formed at 1.0 μM [SeO3(2-)] to 50 nm maximum diameter when formed at 100 μM [SeO3(2-)]. In aggregate, we suggest that glutathione reductase possesses the key attributes of a clonable nanoparticle system: ion reduction, nanoparticle retention and size control of the nanoparticle at the enzyme site.
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Affiliation(s)
- Thomas W Ni
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523, USA.
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Selenium in Agriculture: Water, Air, Soil, Plants, Food, Animals and Nanoselenium. ENVIRONMENTAL CHEMISTRY FOR A SUSTAINABLE WORLD 2015. [DOI: 10.1007/978-3-319-11906-9_5] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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17
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Bacteria in Nanoparticle Synthesis: Current Status and Future Prospects. INTERNATIONAL SCHOLARLY RESEARCH NOTICES 2014; 2014:359316. [PMID: 27355054 PMCID: PMC4897565 DOI: 10.1155/2014/359316] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 07/09/2014] [Accepted: 08/04/2014] [Indexed: 11/17/2022]
Abstract
Microbial metal reduction can be a strategy for remediation of metal contaminations and wastes. Bacteria are capable of mobilization and immobilization of metals and in some cases, the bacteria which can reduce metal ions show the ability to precipitate metals at nanometer scale. Biosynthesis of nanoparticles (NPs) using bacteria has emerged as rapidly developing research area in green nanotechnology across the globe with various biological entities being employed in synthesis of NPs constantly forming an impute alternative for conventional chemical and physical methods. Optimization of the processes can result in synthesis of NPs with desired morphologies and controlled sizes, fast and clean. The aim of this review is, therefore, to make a reflection on the current state and future prospects and especially the possibilities and limitations of the above mentioned bio-based technique for industries.
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Li B, Liu N, Li Y, Jing W, Fan J, Li D, Zhang L, Zhang X, Zhang Z, Wang L. Reduction of selenite to red elemental selenium by Rhodopseudomonas palustris strain N. PLoS One 2014; 9:e95955. [PMID: 24759917 PMCID: PMC3997485 DOI: 10.1371/journal.pone.0095955] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Accepted: 04/01/2014] [Indexed: 02/03/2023] Open
Abstract
The trace metal selenium is in demand for health supplements to human and animal nutrition. We studied the reduction of selenite (SeO₃⁻²) to red elemental selenium by Rhodopseudomonas palustris strain N. This strain was cultured in a medium containing SeO₃⁻² and the particles obtained from cultures were analyzed using transmission electron microscopy (TEM), energy dispersive microanalysis (EDX) and X ray diffraction analysis (XRD). Our results showed the strain N could reduce SeO₃⁻² to red elemental selenium. The diameters of particles were 80-200 nm. The bacteria exhibited significant tolerance to SeO₃⁻² up to 8.0 m mol/L concentration with an EC₅₀ value of 2.4 m mol/L. After 9 d of cultivation, the presence of SeO₃²⁻ up to 1.0 m mol/L resulted in 99.9% reduction of selenite, whereas 82.0% (p<0.05), 31.7% (p<0.05) and 2.4% (p<0.05) reduction of SeO₃⁻² was observed at 2.0, 4.0 and 8.0 m mol/L SeO₃²⁻ concentrations, respectively. This study indicated that red elemental selenium was synthesized by green technology using Rhodopseudomonas palustris strain N. This strain also indicated a high tolerance to SeO₃⁻². The finding of this work will contribute to the application of selenium to human health.
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Affiliation(s)
- Baozhen Li
- School of Life Science, Shanxi University, Taiyuan, China
| | - Na Liu
- School of Life Science, Shanxi University, Taiyuan, China
| | - Yongquan Li
- School of Life Science, Shanxi University, Taiyuan, China
| | - Weixin Jing
- School of Life Science, Shanxi University, Taiyuan, China
| | - Jinhua Fan
- School of Life Science, Shanxi University, Taiyuan, China
| | - Dan Li
- School of Life Science, Shanxi University, Taiyuan, China
| | - Longyan Zhang
- School of Life Science, Shanxi University, Taiyuan, China
| | | | - Zhaoming Zhang
- School of Life Science, Shanxi University, Taiyuan, China
| | - Lan Wang
- School of Life Science, Shanxi University, Taiyuan, China
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Wübbeler JH, Hiessl S, Schuldes J, Thürmer A, Daniel R, Steinbüchel A. Unravelling the complete genome sequence of Advenella mimigardefordensis strain DPN7T and novel insights in the catabolism of the xenobiotic polythioester precursor 3,3'-dithiodipropionate. MICROBIOLOGY-SGM 2014; 160:1401-1416. [PMID: 24739217 DOI: 10.1099/mic.0.078279-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Advenella mimigardefordensis strain DPN7(T) is a remarkable betaproteobacterium because of its extraordinary ability to use the synthetic disulfide 3,3'-dithiodipropionic acid (DTDP) as the sole carbon source and electron donor for aerobic growth. One application of DTDP is as a precursor substrate for biotechnically synthesized polythioesters (PTEs), which are interesting non-degradable biopolymers applicable for plastics materials. Metabolic engineering for optimization of PTE production requires an understanding of DTDP conversion. The genome of A. mimigardefordensis strain DPN7(T) was sequenced and annotated. The circular chromosome was found to be composed of 4,740,516 bp and 4112 predicted ORFs, whereas the circular plasmid consisted of 23,610 bp and 24 predicted ORFs. The genes participating in DTDP catabolism had been characterized in detail previously, but knowing the complete genome sequence and with support of Tn5: :mob-induced mutants, putatively involved transporter proteins and a transcriptional regulator were also identified. Most probably, DTDP is transported into the cell by a specific tripartite tricarboxylate transport system and is then cleaved by the disulfide reductase LpdA, sulfoxygenated by the 3-mercaptopropionate dioxygenase Mdo, activated by the CoA ligase SucCD and desulfinated by the acyl-CoA dehydrogenase-like desulfinase AcdA. Regulation of this pathway is presumably performed by a transcriptional regulator of the xenobiotic response element family. The excessive sulfate that is inevitably produced is secreted by the cells by a unique sulfate exporter of the CPA (cation : proton antiporter) superfamily.
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Affiliation(s)
- Jan Hendrik Wübbeler
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Sebastian Hiessl
- Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
| | - Jörg Schuldes
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany
| | - Andrea Thürmer
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany
| | - Rolf Daniel
- Department of Genomic and Applied Microbiology and Göttingen Genomics Laboratory, Institut für Mikrobiologie und Genetik, Georg-August-Universität Göttingen, Göttingen, Germany
| | - Alexander Steinbüchel
- Faculty of Biology, King Abdulaziz University, Jeddah, Saudi Arabia.,Institut für Molekulare Mikrobiologie und Biotechnologie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany
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Transcriptional Response of Selenopolypeptide Genes and Selenocysteine Biosynthesis Machinery Genes in Escherichia coli during Selenite Reduction. Int J Microbiol 2014; 2014:394835. [PMID: 24839442 PMCID: PMC4009273 DOI: 10.1155/2014/394835] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2013] [Revised: 02/28/2014] [Accepted: 03/16/2014] [Indexed: 01/05/2023] Open
Abstract
Bacteria can reduce toxic selenite into less toxic, elemental selenium (Se0), but the mechanism on how bacterial cells reduce selenite at molecular level is still not clear. We used Escherichia coli strain K12, a common bacterial strain, as a model to study its growth response to sodium selenite (Na2SeO3) treatment and then used quantitative real-time PCR (qRT-PCR) to quantify transcript levels of three E. coli selenopolypeptide genes and a set of machinery genes for selenocysteine (SeCys) biosynthesis and incorporation into polypeptides, whose involvements in the selenite reduction are largely unknown. We determined that 5 mM Na2SeO3 treatment inhibited growth by ∼50% while 0.001 to 0.01 mM treatments stimulated cell growth by ∼30%. Under 50% inhibitory or 30% stimulatory Na2SeO3 concentration, selenopolypeptide genes (fdnG, fdoG, and fdhF) whose products require SeCys but not SeCys biosynthesis machinery genes were found to be induced ≥2-fold. In addition, one sulfur (S) metabolic gene iscS and two previously reported selenite-responsive genes sodA and gutS were also induced ≥2-fold under 50% inhibitory concentration. Our findings provide insight about the detoxification of selenite in E. coli via induction of these genes involved in the selenite reduction process.
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21
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Borghese R, Baccolini C, Francia F, Sabatino P, Turner RJ, Zannoni D. Reduction of chalcogen oxyanions and generation of nanoprecipitates by the photosynthetic bacterium Rhodobacter capsulatus. JOURNAL OF HAZARDOUS MATERIALS 2014; 269:24-30. [PMID: 24462199 DOI: 10.1016/j.jhazmat.2013.12.028] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2013] [Revised: 11/26/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
The facultative photosynthetic bacterium Rhodobacter capsulatus is characterized in its interaction with the toxic oxyanions tellurite (Te(IV)) and selenite (Se(IV)) by a highly variable level of resistance that is dependent on the growth mode making this bacterium an ideal organism for the study of the microbial interaction with chalcogens. As we have reported in the past, while the oxyanion tellurite is taken up by R. capsulatus cells via acetate permease and it is reduced to Te(0) in the cytoplasm in the form of splinter-like black intracellular deposits no clear mechanism was described for Se(0) precipitation. Here, we present the first report on the biotransformation of tellurium and selenium oxyanions into extracellular Te(0) and Se(0)nanoprecipitates (NPs) by anaerobic photosynthetically growing cultures of R. capsulatus as a function of exogenously added redox-mediator lawsone, i.e. 2-hydroxy-1,4-naphthoquinone. The NPs formation was dependent on the carbon source used for the bacterial growth and the rate of chalcogen reduction was constant at different lawsone concentrations, in line with a catalytic role for the redox mediator. X-ray diffraction (XRD) analysis demonstrated the Te(0) and Se(0) nature of the nanoparticles.
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Affiliation(s)
- Roberto Borghese
- Department of Pharmacy and Biotechnology, University of Bologna, Italy.
| | - Chiara Baccolini
- Department of Pharmacy and Biotechnology, University of Bologna, Italy
| | - Francesco Francia
- Department of Pharmacy and Biotechnology, University of Bologna, Italy
| | - Piera Sabatino
- Department of Chemistry G. Ciamician, University of Bologna, Italy
| | - Raymond J Turner
- Department of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Davide Zannoni
- Department of Pharmacy and Biotechnology, University of Bologna, Italy.
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22
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Li DB, Cheng YY, Wu C, Li WW, Li N, Yang ZC, Tong ZH, Yu HQ. Selenite reduction by Shewanella oneidensis MR-1 is mediated by fumarate reductase in periplasm. Sci Rep 2014; 4:3735. [PMID: 24435070 PMCID: PMC3894562 DOI: 10.1038/srep03735] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 12/05/2013] [Indexed: 11/09/2022] Open
Abstract
In situ reduction of selenite to elemental selenium (Se(0)), by microorganisms in sediments and soils is an important process and greatly affects the environmental distribution and the biological effects of selenium. However, the mechanism behind such a biological process remains unrevealed yet. Here we use Shewanella oneidensis MR-1, a widely-distributed dissimilatory metal-reducing bacterium with a powerful and diverse respiration capability, to evaluate the involvement of anaerobic respiration system in the microbial selenite reduction. With mutants analysis, we identify fumarate reductase FccA as the terminal reductase of selenite in periplasm. Moreover, we find that such a reduction is dependent on central respiration c-type cytochrome CymA. In contrast, nitrate reductase, nitrite reductase, and the Mtr electron transfer pathway do not work as selenite reductases. These findings reveal a previously unrecognized role of anaerobic respiration reductases of S. oneidensis MR-1 in selenite reduction and geochemical cycles of selenium in sediments and soils.
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Affiliation(s)
- Dao-Bo Li
- 1] School of Earth and Space Sciences [2] Department of Chemistry [3]
| | | | | | | | | | - Zong-Chuang Yang
- School of Life Sciences, University of Science & Technology of China, Hefei, 230026, China
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23
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Sinha A, Sinha R, Khare SK. Heavy Metal Bioremediation and Nanoparticle Synthesis by Metallophiles. GEOMICROBIOLOGY AND BIOGEOCHEMISTRY 2014. [DOI: 10.1007/978-3-642-41837-2_6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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24
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Hunter WJ. A Rhizobium selenitireducens protein showing selenite reductase activity. Curr Microbiol 2013; 68:311-6. [PMID: 24474405 DOI: 10.1007/s00284-013-0474-7] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Accepted: 08/28/2013] [Indexed: 10/26/2022]
Abstract
Biobarriers remove, via precipitation, the metalloid selenite (SeO₃⁻²) from groundwater; a process that involves the biological reduction of soluble SeO₃⁻² to insoluble elemental red selenium (Se⁰). The enzymes associated with this reduction process are poorly understood. In Rhizobium selenitireducens at least two enzymes are potentially involved; one, a nitrite reductase reduces SeO₃⁻² to Se⁰ but another protein may also be involved which is investigated in this study. Proteins from R. selenitireducens cells were precipitated with ammonium sulfate and run on native electrophoresis gels. When these gels were incubated with NADH and SeO₃⁻² a band of precipitated Se⁰ developed signifying the presence of a SeO₃⁻² reducing protein. Bands were cut from the gel and analyzed for peptides via LCMSMS. The amino acid sequences associated with the bands indicated the presence of an NADH:flavin oxidoreductase that resembles YP_001326930 from Sinorhizobium medicae. The protein is part of a protein family termed old-yellow-enzymes (OYE) that contain a flavin binding domain. OYE enzymes are often involved in protecting cells from oxidative stress and, due in part to an active site that has a highly accessible binding pocket, are generally active on a wide range of substrates. This report is the first of an OYE enzyme being involved in SeO₃⁻² reduction.
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Affiliation(s)
- W J Hunter
- United States Department of Agriculture-Agricultural Research Service, 2150-D Centre Avenue, Fort Collins, CO, 80526-8119, USA,
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25
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Isolation and Identification of High Efficient Oil-Degrading Bacteria and Formulation of Complex Bacteria. ACTA ACUST UNITED AC 2013. [DOI: 10.4028/www.scientific.net/amm.316-317.594] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this experiment, 25 oil degrading bacteria strains were isolated from the beach near Dalian Bay. The top 4 high efficient oil-degrading bacteria(SQ、SY 、SW、SC) were selected to be studied. Using Physiological and biochemical identification, electron microscopy, and 16S rDNA sequence analysis, strain SQ was identified as Advenella kashmirensis,SY was identified as Achromobacter xylosoxidans, SW was identified as Acinetobacter venetianus,SC was identified as Alcaligenes xylosoxidans subsp.xylosoxidans. For the first time this experiment provided reference to application and degradation characteristics of Advenella kashmirensis in crude oil treatment. These four marine oil degrading bacteria were selected to form bacterial consortium. The most efficient mixed strains were constructed by using these four strains with proportional combination. The oil removal ratio of the optimal mixed strains increased to 70.33%, nearly 25% higher than the highest degradation rate of single bacterium, showing significant synergism in the bacterial consortium. Advenella kashmirensis enhanced oil degradation obviously, playing a crucial role in the bacterial consortium.
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Employing a recombinant strain of Advenella mimigardefordensis for biotechnical production of Homopolythioesters from 3,3'-dithiodipropionic acid. Appl Environ Microbiol 2012; 78:3286-97. [PMID: 22344658 DOI: 10.1128/aem.00007-12] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Advenella mimigardefordensis strain DPN7(T) was genetically modified to produce poly(3-mercaptopropionic acid) (PMP) homopolymer by exploiting the recently unraveled process of 3,3'-dithiodipropionic acid (DTDP) catabolism. Production was achieved by systematically engineering the metabolism of this strain as follows: (i) deletion of its inherent 3MP dioxygenase-encoding gene (mdo), (ii) introduction of the buk-ptb operon (genes encoding the butyrate kinase, Buk, and the phosphotransbutyrylase, Ptb, from Clostridium acetobutylicum), and (iii) overexpression of its own polyhydroxyalkanoate synthase (phaC(Am)). These measures yielded the potent PMP production strain A. mimigardefordensis strain SHX22. The deletion of mdo was required for adequate synthesis of PMP due to the resulting accumulation of 3MP during utilization of DTDP. Overexpression of the plasmid-borne buk-ptb operon caused a severe growth repression. This effect was overcome by inserting this operon into the genome. Polyhydroxyalkanoate (PHA) synthases from different origins were compared. The native PHA synthase of A. mimigardefordensis (phaC(Am)) was obviously the best choice to establish homopolythioester production in this strain. In addition, the cultivation conditions, including an appropriate provision of the carbon source, were further optimized to enhance PMP production. The engineered strain accumulated PMP up to approximately 25% (wt/wt) of the cell dry weight when cultivated in mineral salts medium containing glycerol as the carbon source in addition to DTDP as the sulfur-providing precursor. According to our knowledge, this is the first report of PMP homopolymer production by a metabolically engineered bacterium using DTDP, which is nontoxic, as the precursor substrate.
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Turner RJ, Borghese R, Zannoni D. Microbial processing of tellurium as a tool in biotechnology. Biotechnol Adv 2011; 30:954-63. [PMID: 21907273 DOI: 10.1016/j.biotechadv.2011.08.018] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2011] [Accepted: 08/22/2011] [Indexed: 01/22/2023]
Abstract
Here, we overview the most recent advances in understanding the bacterial mechanisms that stay behind the reduction of tellurium oxyanions in both planktonic cells and biofilms. This is a topic of interest for basic and applied research because microorganisms are deeply involved in the transformation of metals and metalloids in the environment. In particular, the recent observation that toxic tellurite can be precipitated either inside or outside the cells being used as electron sink to support bacterial growth, opens new perspectives for both microbial physiologists and biotechnologists. As promising nanomaterials, tellurium based nanoparticles show unique electronic and optical properties due to quantum confinement effects to be used in the area of chemistry, electronics, medicine and environmental biotechnologies.
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Affiliation(s)
- Raymond J Turner
- Dept of Biological Sciences, University of Calgary, Calgary, Alberta, Canada
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Rigobello MP, Folda A, Citta A, Scutari G, Gandin V, Fernandes AP, Rundlöf AK, Marzano C, Björnstedt M, Bindoli A. Interaction of selenite and tellurite with thiol-dependent redox enzymes: Kinetics and mitochondrial implications. Free Radic Biol Med 2011; 50:1620-9. [PMID: 21397686 DOI: 10.1016/j.freeradbiomed.2011.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2010] [Revised: 02/17/2011] [Accepted: 03/04/2011] [Indexed: 12/13/2022]
Abstract
The interactions of selenite and tellurite with cytosolic and mitochondrial thioredoxin reductases (TrxR1 and TrxR2) and glutathione reductases (GR) from yeast and mammalian sources were explored. Both TrxR1 and TrxR2 act as selenite and tellurite reductases. Kinetic treatment shows that selenite has a greater affinity than tellurite with both TrxR1 and TrxR2. Considering both k(cat) and K(m), selenite shows a better catalytic efficiency than tellurite with TrxR1, whereas with TrxR2, the catalytic efficiency is similar for both chalcogens. Tellurite is a good substrate for GR, whereas selenite is almost completely ineffective. Selenite or tellurite determine a large mitochondrial permeability transition associated with thiol group oxidation. However, with increasing concentrations of both chalcogens, only about 25% of total thiols are oxidized. In isolated mitochondria, selenite or tellurite per se does not stimulate H₂O₂ production, which, however, is increased by the presence of auranofin. They also determine a large oxidation of mitochondrial pyridine nucleotides. In ovarian cancer cells both chalcogens decrease the mitochondrial membrane potential. These results indicate that selenite and tellurite, interacting with the thiol-dependent enzymes, alter the balance connecting pyridine nucleotides and thiol redox state, consequently leading to mitochondrial and cellular alterations essentially referable to a disulfide stress.
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Comparative assessment of selenite (SeIV) detoxification to elemental selenium (Se0) by Bacillus sp. Biotechnol Lett 2010; 32:1255-9. [DOI: 10.1007/s10529-010-0291-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2010] [Accepted: 04/21/2010] [Indexed: 10/19/2022]
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Narayanan KB, Sakthivel N. Biological synthesis of metal nanoparticles by microbes. Adv Colloid Interface Sci 2010; 156:1-13. [PMID: 20181326 DOI: 10.1016/j.cis.2010.02.001] [Citation(s) in RCA: 758] [Impact Index Per Article: 54.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Revised: 02/02/2010] [Accepted: 02/02/2010] [Indexed: 11/26/2022]
Abstract
An array of physical, chemical and biological methods have been used to synthesize nanomaterials. In order to synthesize noble metal nanoparticles of particular shape and size specific methodologies have been formulated. Although ultraviolet irradiation, aerosol technologies, lithography, laser ablation, ultrasonic fields, and photochemical reduction techniques have been used successfully to produce nanoparticles, they remain expensive and involve the use of hazardous chemicals. Therefore, there is a growing concern to develop environment-friendly and sustainable methods. Since the synthesis of nanoparticles of different compositions, sizes, shapes and controlled dispersity is an important aspect of nanotechnology new cost-effective procedures are being developed. Microbial synthesis of nanoparticles is a green chemistry approach that interconnects nanotechnology and microbial biotechnology. Biosynthesis of gold, silver, gold-silver alloy, selenium, tellurium, platinum, palladium, silica, titania, zirconia, quantum dots, magnetite and uraninite nanoparticles by bacteria, actinomycetes, fungi, yeasts and viruses have been reported. However, despite the stability, biological nanoparticles are not monodispersed and the rate of synthesis is slow. To overcome these problems, several factors such as microbial cultivation methods and the extraction techniques have to be optimized and the combinatorial approach such as photobiological methods may be used. Cellular, biochemical and molecular mechanisms that mediate the synthesis of biological nanoparticles should be studied in detail to increase the rate of synthesis and improve properties of nanoparticles. Owing to the rich biodiversity of microbes, their potential as biological materials for nanoparticle synthesis is yet to be fully explored. In this review, we present the current status of microbial synthesis and applications of metal nanoparticles.
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Conjugative Type 4 secretion system of a novel large plasmid from the chemoautotroph Tetrathiobacter kashmirensis and construction of shuttle vectors for Alcaligenaceae. Appl Environ Microbiol 2009; 75:4362-73. [PMID: 19411426 DOI: 10.1128/aem.02521-08] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Tetrathiobacter spp. and other members of the Alcaligenaceae are metabolically versatile and environmentally significant. A novel, approximately 60-kb conjugative plasmid, pBTK445, from the sulfur chemolithoautotroph Tetrathiobacter kashmirensis, was identified and characterized. This plasmid exists at a low copy number of 2 to 3 per host chromosome. The portion of pBTK445 sequenced so far ( approximately 25 kb) harbors genes putatively involved in replication, transfer functions, partition, and UV damage repair. A 1,373-bp region was identified as the minimal replicon. This region contains a repA gene encoding a protein belonging to the RPA (replication protein A) superfamily and an upstream, iteron-based oriV. A contiguous 11-gene cluster homologous to various type 4 secretion systems (T4SSs) was identified. Insertional inactivation demonstrated that this cluster is involved in the conjugative transfer functions of pBTK445, and thus, it was named the tagB (transfer-associated gene homologous to virB) locus. The core and peripheral TagB components show different phylogenetic affinities, suggesting that this system has evolved by assembling components from evolutionarily divergent T4SSs. A virD4 homolog, putatively involved in nucleoprotein transfer, is also present downstream of the tagB locus. Although pBTK445 resembles IncP plasmids in terms of its genomic organization and the presence of an IncP-specific trbM homolog, it also shows several unique features. Unlike that of IncP, the oriT of pBTK445 is located in close proximity to the oriV, and a traL homolog, which is generally present in the TraI locus of IncP, is present in pBTK445 in isolation, upstream of the tagB locus. A significant outcome of this study is the construction of conjugative shuttle vectors for Tetrathiobacter and related members of the Alkaligenaceae.
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