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Mandhata CP, Sahoo CR, Padhy RN. Biomedical Applications of Biosynthesized Gold Nanoparticles from Cyanobacteria: an Overview. Biol Trace Elem Res 2022; 200:5307-5327. [PMID: 35083708 DOI: 10.1007/s12011-021-03078-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Accepted: 12/20/2021] [Indexed: 11/28/2022]
Abstract
Recently there had been a great interest in biologically synthesized nanoparticles (NPs) as potential therapeutic agents. The shortcomings of conventional non-biological synthesis methods such as generation of toxic byproducts, energy consumptions, and involved cost have shifted the attention towards green syntheses of NPs. Among noble metal NPs, gold nanoparticles (AuNPs) are the most extensively used ones, owing to the unique physicochemical properties. AuNPs have potential therapeutic applications, as those are synthesized with biomolecules as reducing and stabilizing agent(s). The green method of AuNP synthesis is simple, eco-friendly, non-toxic, and cost-effective with the use of renewable energy sources. Among all taxa, cyanobacteria have attracted considerable attention as nano-biofactories, due to cellular uptake of heavy metals from the environment. The cellular bioactive pigments, enzymes, and polysaccharides acted as reducing and coating agents during the process of biosynthesis. However, cyanobacteria-mediated AuNPs have potential biomedical applications, namely, targeted drug delivery, cancer treatment, gene therapy, antimicrobial agent, biosensors, and imaging.
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Affiliation(s)
- Chinmayee Priyadarsani Mandhata
- Central Research Laboratory, Institute of Medical Sciences & SUM Hospital, Siksha O Anusandhan Deemed To Be University, Bhubaneswar, Odisha, India
| | - Chita Ranjan Sahoo
- Central Research Laboratory, Institute of Medical Sciences & SUM Hospital, Siksha O Anusandhan Deemed To Be University, Bhubaneswar, Odisha, India
| | - Rabindra Nath Padhy
- Central Research Laboratory, Institute of Medical Sciences & SUM Hospital, Siksha O Anusandhan Deemed To Be University, Bhubaneswar, Odisha, India.
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Srivastava S, Usmani Z, Atanasov AG, Singh VK, Singh NP, Abdel-Azeem AM, Prasad R, Gupta G, Sharma M, Bhargava A. Biological Nanofactories: Using Living Forms for Metal Nanoparticle Synthesis. Mini Rev Med Chem 2021; 21:245-265. [PMID: 33198616 DOI: 10.2174/1389557520999201116163012] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 08/21/2020] [Accepted: 09/08/2020] [Indexed: 11/22/2022]
Abstract
Metal nanoparticles are nanosized entities with dimensions of 1-100 nm that are increasingly in demand due to applications in diverse fields like electronics, sensing, environmental remediation, oil recovery and drug delivery. Metal nanoparticles possess large surface energy and properties different from bulk materials due to their small size, large surface area with free dangling bonds and higher reactivity. High cost and pernicious effects associated with the chemical and physical methods of nanoparticle synthesis are gradually paving the way for biological methods due to their eco-friendly nature. Considering the vast potentiality of microbes and plants as sources, biological synthesis can serve as a green technique for the synthesis of nanoparticles as an alternative to conventional methods. A number of reviews are available on green synthesis of nanoparticles but few have focused on covering the entire biological agents in this process. Therefore present paper describes the use of various living organisms like bacteria, fungi, algae, bryophytes and tracheophytes in the biological synthesis of metal nanoparticles, the mechanisms involved and the advantages associated therein.
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Affiliation(s)
- Shilpi Srivastava
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow, India
| | - Zeba Usmani
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Tallinn, Estonia
| | | | | | | | - Ahmed M Abdel-Azeem
- Botany Department, Faculty of Science, University of Suez Canal, Ismailia, Egypt
| | - Ram Prasad
- Department of Botany, Mahatma Gandhi Central University, Motihari, Bihar, India
| | - Govind Gupta
- Sage School of Agriculture, Sage University, Bhopal, India
| | - Minaxi Sharma
- Department of Food Technology, Akal College of Agriculture, Eternal University, Baru Sahib, Himachal Pradesh, India
| | - Atul Bhargava
- Department of Botany, Mahatma Gandhi Central University, Motihari, Bihar, India
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Abstract
Nitrogenase is the only enzyme capable of reducing N2 to NH3. This challenging reaction requires the coordinated transfer of multiple electrons from the reductase, Fe-protein, to the catalytic component, MoFe-protein, in an ATP-dependent fashion. In the last two decades, there have been significant advances in our understanding of how nitrogenase orchestrates electron transfer (ET) from the Fe-protein to the catalytic site of MoFe-protein and how energy from ATP hydrolysis transduces the ET processes. In this review, we summarize these advances, with focus on the structural and thermodynamic redox properties of nitrogenase component proteins and their complexes, as well as on new insights regarding the mechanism of ET reactions during catalysis and how they are coupled to ATP hydrolysis. We also discuss recently developed chemical, photochemical, and electrochemical methods for uncoupling substrate reduction from ATP hydrolysis, which may provide new avenues for studying the catalytic mechanism of nitrogenase.
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Affiliation(s)
- Hannah L Rutledge
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0340, United States
| | - F Akif Tezcan
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0340, United States
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Bacillus megaterium-induced biocorrosion on mild steel and the effect of Artemisia pallens methanolic extract as a natural corrosion inhibitor. Arch Microbiol 2020; 202:2311-2321. [PMID: 32564100 DOI: 10.1007/s00203-020-01951-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 06/03/2020] [Accepted: 06/10/2020] [Indexed: 12/19/2022]
Abstract
Methanolic extract of Artemisia pallens (MEAP) (Asteraceae) was explored as greenbiocorrosion inhibitor for mild steel 1010 in 1.5% sodium chloride environment. Bacillus megaterium SKR7 induces the development of biofilm on the metal surface and forms the pitting corrosion. MEAP was showed (25 ppm) optimum inhibition effect of biocorrosion and further corrosion rate was highly reduced (0.3335 mm/year) than the control system (0.009 mm/year). The electrochemical study has supported the results with a higher value of total resistance (34 Ω cm2) when compared to control systems. It reveals the formation of a protective layer on the metal surface and reduces the adsorption of biofilm. This was due to the antimicrobial effect of MEAP. Overall, the results recognized that MEAP used as a green corrosion inhibitor for MS 1010 with 83% inhibition efficiency.
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Tsurumaru H, Ito N, Mori K, Wakai S, Uchiyama T, Iino T, Hosoyama A, Ataku H, Nishijima K, Mise M, Shimizu A, Harada T, Horikawa H, Ichikawa N, Sekigawa T, Jinno K, Tanikawa S, Yamazaki J, Sasaki K, Yamazaki S, Fujita N, Harayama S. An extracellular [NiFe] hydrogenase mediating iron corrosion is encoded in a genetically unstable genomic island in Methanococcus maripaludis. Sci Rep 2018; 8:15149. [PMID: 30310166 PMCID: PMC6181927 DOI: 10.1038/s41598-018-33541-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Accepted: 10/01/2018] [Indexed: 11/09/2022] Open
Abstract
Certain methanogens deteriorate steel surfaces through a process called microbiologically influenced corrosion (MIC). However, the mechanisms of MIC, whereby methanogens oxidize zerovalent iron (Fe0), are largely unknown. In this study, Fe0-corroding Methanococcus maripaludis strain OS7 and its derivative (strain OS7mut1) defective in Fe0-corroding activity were isolated. Genomic analysis of these strains demonstrated that the strain OS7mut1 contained a 12-kb chromosomal deletion. The deleted region, termed "MIC island", encoded the genes for the large and small subunits of a [NiFe] hydrogenase, the TatA/TatC genes necessary for the secretion of the [NiFe] hydrogenase, and a gene for the hydrogenase maturation protease. Thus, the [NiFe] hydrogenase may be secreted outside the cytoplasmic membrane, where the [NiFe] hydrogenase can make direct contact with Fe0, and oxidize it, generating hydrogen gas: Fe0 + 2 H+ → Fe2+ + H2. Comparative analysis of extracellular and intracellular proteomes of strain OS7 supported this hypothesis. The identification of the MIC genes enables the development of molecular tools to monitor epidemiology, and to perform surveillance and risk assessment of MIC-inducing M. maripaludis.
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Affiliation(s)
- Hirohito Tsurumaru
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Naofumi Ito
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Koji Mori
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Satoshi Wakai
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Taku Uchiyama
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Takao Iino
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Akira Hosoyama
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Hanako Ataku
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Keiko Nishijima
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Miyako Mise
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Ai Shimizu
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Takeshi Harada
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Hiroshi Horikawa
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Natsuko Ichikawa
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Tomohiro Sekigawa
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Koji Jinno
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Satoshi Tanikawa
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Jun Yamazaki
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Kazumi Sasaki
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Syuji Yamazaki
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Nobuyuki Fujita
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan
| | - Shigeaki Harayama
- NITE Biological Resource Center (NBRC), National Institute of Technology and Evaluation (NITE), Chiba, 292-0818, Japan.
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Rajyalaxmi K, Merugu R, Girisham S, Reddy SM. Chromate Reduction by Purple Non Sulphur Phototrophic Bacterium Rhodobacter sp. GSKRLMBKU–03 Isolated from Pond Water. ACTA ACUST UNITED AC 2017. [DOI: 10.1007/s40011-017-0939-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Mehanna M, Rouvre I, Delia ML, Feron D, Bergel A, Basseguy R. Discerning different and opposite effects of hydrogenase on the corrosion of mild steel in the presence of phosphate species. Bioelectrochemistry 2016; 111:31-40. [PMID: 27187892 DOI: 10.1016/j.bioelechem.2016.04.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 04/19/2016] [Accepted: 04/19/2016] [Indexed: 11/29/2022]
Affiliation(s)
- Maha Mehanna
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Ingrid Rouvre
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Marie-Line Delia
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Damien Feron
- Den-Service de la Corrosion et du Comportement des Matériaux dans leur Environnement (SCCME), CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - Alain Bergel
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France
| | - Régine Basseguy
- Laboratoire de Génie Chimique, Université de Toulouse, CNRS, INPT, UPS, Toulouse, France.
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Rösken LM, Cappel F, Körsten S, Fischer CB, Schönleber A, van Smaalen S, Geimer S, Beresko C, Ankerhold G, Wehner S. Time-dependent growth of crystalline Au(0)-nanoparticles in cyanobacteria as self-reproducing bioreactors: 2. Anabaena cylindrica. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2016; 7:312-27. [PMID: 27335727 PMCID: PMC4901539 DOI: 10.3762/bjnano.7.30] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 02/10/2016] [Indexed: 06/06/2023]
Abstract
Microbial biosynthesis of metal nanoparticles as needed in catalysis has shown its theoretical ability as an extremely environmentally friendly production method in the last few years, even though the separation of the nanoparticles is challenging. Biosynthesis, summing up biosorption and bioreduction of diluted metal ions to zero valent metals, is especially ecofriendly, when the bioreactor itself is harmless and needs no further harmful reagents. The cyanobacterium Anabaena cylindrica (SAG 1403.2) is able to form crystalline Au(0)-nanoparticles from Au(3+) ions and does not release toxic anatoxin-a. X-ray powder diffraction (XRD), transmission electron microscopy (TEM) and laser-induced breakdown spectroscopy (LIBS) are applied to monitor the time-dependent development of gold nanoparticles for up to 40 hours. Some vegetative cells (VC) are filled with nanoparticles within minutes, while the extracellular polymeric substances (EPS) of vegetative cells and the heterocyst polysaccharide layer (HEP) are the regions, where the first nanoparticles are detected on most other cells. The uptake of gold starts immediately after incubation and within four hours the average size remains constant around 10 nm. Analyzing the TEM images with an image processing program reveals a wide distribution for the diameter of the nanoparticles at all times and in all regions of the cyanobacteria. Finally, the nanoparticle concentration in vegetative cells of Anabaena cylindrica is about 50% higher than in heterocysts (HC). These nanoparticles are found to be located along the thylakoid membranes.
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Affiliation(s)
- Liz M Rösken
- Universität Koblenz-Landau, Institut für Integrierte Naturwissenschaften, Abteilung Physik, 56070 Koblenz, Germany
| | - Felix Cappel
- Universität Koblenz-Landau, Institut für Integrierte Naturwissenschaften, Abteilung Physik, 56070 Koblenz, Germany
| | - Susanne Körsten
- Universität Koblenz-Landau, Institut für Integrierte Naturwissenschaften, Abteilung Physik, 56070 Koblenz, Germany
| | - Christian B Fischer
- Universität Koblenz-Landau, Institut für Integrierte Naturwissenschaften, Abteilung Physik, 56070 Koblenz, Germany
| | - Andreas Schönleber
- Universität Bayreuth, Lehrstuhl für Kristallographie, 95440 Bayreuth, Germany
| | - Sander van Smaalen
- Universität Bayreuth, Lehrstuhl für Kristallographie, 95440 Bayreuth, Germany
| | - Stefan Geimer
- Universität Bayreuth, Zellbiologie / Elektronenmikroskopie, 95440 Bayreuth, Germany
| | - Christian Beresko
- Hochschule Koblenz, RheinAhrCampus Remagen, Optics and Laser Engineering, 53424 Remagen, Germany
| | - Georg Ankerhold
- Hochschule Koblenz, RheinAhrCampus Remagen, Optics and Laser Engineering, 53424 Remagen, Germany
| | - Stefan Wehner
- Universität Koblenz-Landau, Institut für Integrierte Naturwissenschaften, Abteilung Physik, 56070 Koblenz, Germany
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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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Abdullatypov AV, Zorin NA, Tsygankov AA. Interaction of HydSL hydrogenase from the purple sulfur bacterium Thiocapsa roseopersicina BBS with methyl viologen and positively charged polypeptides. BIOCHEMISTRY (MOSCOW) 2014; 79:805-11. [DOI: 10.1134/s0006297914080082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zadvornyy OA, Allen M, Brumfield SK, Varpness Z, Boyd ES, Zorin NA, Serebriakova L, Douglas T, Peters JW. Hydrogen enhances nickel tolerance in the purple sulfur bacterium Thiocapsa roseopersicina. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:834-840. [PMID: 19928895 DOI: 10.1021/es901580n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A common microbial strategy for detoxifying metals involves redox transformation which often results in metal precipitation and/or immobilization. In the present study, the influence of ionic nickel [Ni(II)] on growth of the purple sulfur bacterium Thiocapsa roseopersicina was investigated. The results suggest that Ni(II) in the bulk medium at micromolar concentrations results in growth inhibition, specifically an increase in the lag phase of growth, a decrease in the specific growth rate, and a decrease in total protein concentration when compared to growth controls containing no added Ni(II). The inhibitory effects of Ni(II) on the growth of T. roseopersicina could be partially overcome by the addition of hydrogen (H(2)) gas. However, the inhibitory effects of Ni(II) on the growth of T. roseopersicina were not alleviated by H(2) in a strain containing deletions in all hydrogenase-encoding genes. Transmission electron micrographs of wild-type T. roseopersicina grown in the presence of Ni(II) and H(2) revealed a significantly greater number of dense nanoparticulates associated with the cells when compared to wild-type cells grown in the absence of H(2) and hydrogenase mutant strains grown in the presence of H(2). X-ray diffraction and vibrating sample magnetometry of the dense nanoparticles indicated the presence of zerovalent Ni, suggesting Ni(II) reduction. Purified T. roseopersicina hyn-encoded hydrogenase catalyzed the formation of zerovalent Ni particles in vitro, suggesting a role for this hydrogenase in Ni(II) reduction in vivo. Collectively, these results suggest a link among H(2) metabolism, Ni(II) tolerance, and Ni(II) reduction in T. roseopersicina .
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Affiliation(s)
- Oleg A Zadvornyy
- Department of Chemistry and Biochemistry, Montana State University, Bozeman, Montana 59717, USA
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Zadvorny OA, Barrows AM, Zorin NA, Peters JW, Elgren TE. High level of hydrogen production activity achieved for hydrogenase encapsulated in sol–gel material doped with carbon nanotubes. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b922296k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mehanna M, Basseguy R, Delia ML, Girbal L, Demuez M, Bergel A. New hypotheses for hydrogenase implication in the corrosion of mild steel. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.02.101] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Konishi Y, Tsukiyama T, Tachimi T, Saitoh N, Nomura T, Nagamine S. Microbial deposition of gold nanoparticles by the metal-reducing bacterium Shewanella algae. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.02.073 10.1016/j.electacta.2007.02.073] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Vignais PM, Billoud B. Occurrence, Classification, and Biological Function of Hydrogenases: An Overview. Chem Rev 2007; 107:4206-72. [PMID: 17927159 DOI: 10.1021/cr050196r] [Citation(s) in RCA: 1039] [Impact Index Per Article: 61.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Paulette M. Vignais
- CEA Grenoble, Laboratoire de Biochimie et Biophysique des Systèmes Intégrés, UMR CEA/CNRS/UJF 5092, Institut de Recherches en Technologies et Sciences pour le Vivant (iRTSV), 17 rue des Martyrs, 38054 Grenoble cedex 9, France, and Atelier de BioInformatique Université Pierre et Marie Curie (Paris 6), 12 rue Cuvier, 75005 Paris, France
| | - Bernard Billoud
- CEA Grenoble, Laboratoire de Biochimie et Biophysique des Systèmes Intégrés, UMR CEA/CNRS/UJF 5092, Institut de Recherches en Technologies et Sciences pour le Vivant (iRTSV), 17 rue des Martyrs, 38054 Grenoble cedex 9, France, and Atelier de BioInformatique Université Pierre et Marie Curie (Paris 6), 12 rue Cuvier, 75005 Paris, France
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Caiazza NC, Lies DP, Newman DK. Phototrophic Fe(II) oxidation promotes organic carbon acquisition by Rhodobacter capsulatus SB1003. Appl Environ Microbiol 2007; 73:6150-8. [PMID: 17693559 PMCID: PMC2074999 DOI: 10.1128/aem.02830-06] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2006] [Accepted: 08/01/2007] [Indexed: 11/20/2022] Open
Abstract
Anoxygenic phototrophic Fe(II) oxidation is usually considered to be a lithoautotrophic metabolism that contributes to primary production in Fe-based ecosystems. In this study, we employed Rhodobacter capsulatus SB1003 as a model organism to test the hypothesis that phototrophic Fe(II) oxidation can be coupled to organic carbon acquisition. R. capsulatus SB1003 oxidized Fe(II) under anoxic conditions in a light-dependent manner, but it failed to grow lithoautotrophically on soluble Fe(II). When the strain was provided with Fe(II)-citrate, however, growth was observed that was dependent upon microbially catalyzed Fe(II) oxidation, resulting in the formation of Fe(III)-citrate. Subsequent photochemical breakdown of Fe(III)-citrate yielded acetoacetic acid that supported growth in the light but not the dark. The deletion of genes (RRC00247 and RRC00248) that encode homologs of atoA and atoD, required for acetoacetic acid utilization, severely impaired the ability of R. capsulatus SB1003 to grow on Fe(II)-citrate. The growth yield achieved by R. capsulatus SB1003 in the presence of citrate cannot be explained by lithoautotrophic growth on Fe(II) enabled by indirect effects of the ligand [such as altering the thermodynamics of Fe(II) oxidation or preventing cell encrustation]. Together, these results demonstrate that R. capsulatus SB1003 grows photoheterotrophically on Fe(II)-citrate. Nitrilotriacetic acid also supported light-dependent growth on Fe(II), suggesting that Fe(II) oxidation may be a general mechanism whereby some Fe(II)-oxidizing bacteria mine otherwise inaccessible organic carbon sources.
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Affiliation(s)
- Nicky C Caiazza
- Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, California 91125, USA
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