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Vigil T, Spangler LC. Understanding Biomineralization Mechanisms to Produce Size-Controlled, Tailored Nanocrystals for Optoelectronic and Catalytic Applications: A Review. ACS APPLIED NANO MATERIALS 2024; 7:18626-18654. [PMID: 39206356 PMCID: PMC11348323 DOI: 10.1021/acsanm.3c04277] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 01/25/2024] [Accepted: 01/25/2024] [Indexed: 09/04/2024]
Abstract
Biomineralization, the use of biological systems to produce inorganic materials, has recently become an attractive approach for the sustainable manufacturing of functional nanomaterials. Relying on proteins or other biomolecules, biomineralization occurs under ambient temperatures and pressures, which presents an easily scalable, economical, and environmentally friendly method for nanoparticle synthesis. Biomineralized nanocrystals are quickly approaching a quality applicable for catalytic and optoelectronic applications, replacing materials synthesized using expensive traditional routes. Here, we review the current state of development for producing functional nanocrystals using biomineralization and distill the wide variety of biosynthetic pathways into two main approaches: templating and catalysis. Throughout, we compare and contrast biomineralization and traditional syntheses, highlighting optimizations from traditional syntheses that can be implemented to improve biomineralized nanocrystal properties such as size and morphology, making them competitive with chemically synthesized state-of-the-art functional nanomaterials.
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Affiliation(s)
- Toriana
N. Vigil
- University
of Virginia, Charlottesville, Virginia 22903, United States
| | - Leah C. Spangler
- Virginia
Commonwealth University, Richmond, Virginia 23284, United States
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2
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Browne LBF, Sudmeier T, Landis MA, Allen CS, Vincent KA. Controlled Biocatalytic Synthesis of a Metal Nanoparticle-Enzyme Hybrid: Demonstration for Catalytic H 2-driven NADH Recycling. Angew Chem Int Ed Engl 2024; 63:e202404024. [PMID: 38641561 DOI: 10.1002/anie.202404024] [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: 02/27/2024] [Revised: 04/17/2024] [Accepted: 04/19/2024] [Indexed: 04/21/2024]
Abstract
Here we demonstrate the preparation of enzyme-metal biohybrids of NAD+ reductase with biocatalytically-synthesised small gold nanoparticles (NPs, <10 nm) and core-shell gold-platinum NPs for tandem catalysis. Despite the variety of methods available for NP synthesis, there remains a need for more sustainable strategies which also give precise control over the shape and size of the metal NPs for applications in catalysis, biomedical devices, and electronics. We demonstrate facile biosynthesis of spherical, highly uniform, gold NPs under mild conditions using an isolated enzyme moiety, an NAD+ reductase, to reduce metal salts while oxidising a nicotinamide-containing cofactor. By subsequently introducing platinum salts, we show that core-shell Au@Pt NPs can then be formed. Catalytic function of these enzyme-Au@Pt NP hybrids was demonstrated for H2-driven NADH recycling to support enantioselective ketone reduction by an NADH-dependent alcohol dehydrogenase.
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Affiliation(s)
- Lucy B F Browne
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Rd, Oxford, OX1 3QR, United Kingdom
| | - Tim Sudmeier
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Rd, Oxford, OX1 3QR, United Kingdom
| | - Maya A Landis
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Rd, Oxford, OX1 3QR, United Kingdom
| | - Christopher S Allen
- Electron Physical Science Imaging Centre, Diamond Light Source, Oxford, OX11 0DE, United Kingdom
- Department of Materials, University of Oxford, Parks Rd, Oxford, OX1 3PH, United Kingdom
| | - Kylie A Vincent
- Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, South Parks Rd, Oxford, OX1 3QR, United Kingdom
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3
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Tumor microenvironment-triggered intratumoral in-situ biosynthesis of inorganic nanomaterials for precise tumor diagnostics. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2023.215115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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4
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Sahoo A, Satapathy KB, Sahoo SK, Panigrahi GK. Microbased biorefinery for gold nanoparticle production: recent advancements, applications and future aspects. Prep Biochem Biotechnol 2022:1-12. [PMID: 36137172 DOI: 10.1080/10826068.2022.2122065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
Multifaceted utility of nanomaterials is indispensable to meet the environmental challenges across the globe. Nanomaterials substantially contribute in delineating the rapidly advancing field of nanotechnology. Recently, primary emphasis has been laid down on augmenting the biological methodologies for the synthesis of nanomaterials. In this aspect, green nanotechnology has revolutionized the entire process of nanosynthesis. Essentially biofabrication of nanoparticles have long-range applications, primarily in the field of medical applications such as drug delivery, cancer diagnostics and genetic engineering processes. Biocompatible and stable nanoparticles synthesized from biological source can be an effective approach against the chemically synthesized owing to their non-expensive and eco-friendly attributes. Biological systems including bacteria, yeasts, fungi and plants have already been exploited in the field of nanotechnology. Use of fungi seems to be a very effective and economical approach for the synthesis of gold nanoparticles. Gold nanoparticles possess anti-oxidation activity, are highly stable and biocompatible in nature. Fungi-mediated nanoparticle biosynthesis is more advantageous as compared to bacterial synthesis. Fungi secrete large amounts of enzymes, whereas the enzyme secretion of yeasts is weak. Here, we have reported the recent advancements and future implications in the field of gold nanoparticle production and applications.
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Affiliation(s)
- Annapurna Sahoo
- School of Applied Sciences, Centurion University of Technology and Management, Bhubaneswar, India
| | - Kunja Bihari Satapathy
- School of Applied Sciences, Centurion University of Technology and Management, Bhubaneswar, India
| | - Shraban Kumar Sahoo
- School of Applied Sciences, Centurion University of Technology and Management, Bhubaneswar, India
| | - Gagan Kumar Panigrahi
- School of Applied Sciences, Centurion University of Technology and Management, Bhubaneswar, India
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5
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Dashora K, Gattupalli M, Javed Z, Tripathi GD, Sharma R, Mishra M, Bhargava A, Srivastava S. Leveraging multiomics approaches for producing lignocellulose degrading enzymes. Cell Mol Life Sci 2022; 79:132. [PMID: 35152331 PMCID: PMC11072819 DOI: 10.1007/s00018-022-04176-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 12/16/2021] [Accepted: 01/25/2022] [Indexed: 11/03/2022]
Abstract
Lignocellulosic materials form the building block of 50% of plant biomass comprising non-chewable agri-components like wheat straw, rice stubbles, wood shavings and other crop residues. The degradation of lignin, cellulose and hemicellulose is complicated and presently being done by chemical process for industrial application through a very energy intensive process. Lignin degradation is primarily an oxidative process where the enzyme lignin peroxidase digests the polymer into smaller fragments. Being a recalcitrant component, higher lignin content poses a challenge of lower recovery of product for industrial use. Globally, the scientists are working on leveraging fungal biotechnology for using the lignocellulose degrading enzymes secreted by actinomycetes and basidiomycetes fungal groups. Enzymes contributing to degradation of lignin are mainly performing the function of modifying the lignin and degrading the lignin. Ligninolytic enzymes do not act as an independent reaction but are vital to complete the degradation process. Microbial enzyme technology is an emerging green tool in industrial biotechnology for commercial application. Bioprocessing of lignocellulosic biomass is challenged by limitations in enzymatic and conversion process where pretreatment and separation steps are done to remove lignin and hydrolyze carbohydrate into fermentable sugars. This review highlights recent advances in molecular biotechnology, lignin valorization, sequencing, decipher microbial membership, and characterize enzyme diversity through 'omics' techniques. Emerging techniques to characterize the interwoven metabolism and spatial interactions between anaerobes are also reviewed, which will prove critical to developing a predictive understanding of anaerobic communities to guide in microbiome engineering This requires more synergistic collaborations from microbial biotechnologists, bioprocess engineers, enzymologists, and other biotechnological fields.
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Affiliation(s)
- Kavya Dashora
- Centre for Rural Development and Technology, Indian Institute of Technology, Delhi, India.
| | - Meghana Gattupalli
- Centre for Rural Development and Technology, Indian Institute of Technology, Delhi, India
| | - Zoya Javed
- Centre for Rural Development and Technology, Indian Institute of Technology, Delhi, India
| | - Gyan Datta Tripathi
- Centre for Rural Development and Technology, Indian Institute of Technology, Delhi, India
| | - Ruchi Sharma
- Centre for Rural Development and Technology, Indian Institute of Technology, Delhi, India
| | - Mansi Mishra
- Centre for Rural Development and Technology, Indian Institute of Technology, Delhi, India
| | - Atul Bhargava
- Department of Botany, Mahatma Gandhi Central University, Bihar, India
| | - Shilpi Srivastava
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow, India
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6
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Mikhailova EO. Gold Nanoparticles: Biosynthesis and Potential of Biomedical Application. J Funct Biomater 2021; 12:70. [PMID: 34940549 PMCID: PMC8708476 DOI: 10.3390/jfb12040070] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 11/20/2021] [Accepted: 11/30/2021] [Indexed: 12/19/2022] Open
Abstract
Gold nanoparticles (AuNPs) are extremely promising objects for solving a wide range of biomedical problems. The gold nanoparticles production by biological method ("green synthesis") is eco-friendly and allows minimization of the amount of harmful chemical and toxic byproducts. This review is devoted to the AuNPs biosynthesis peculiarities using various living organisms (bacteria, fungi, algae, and plants). The participation of various biomolecules in the AuNPs synthesis and the influence of size, shapes, and capping agents on the functionalities are described. The proposed action mechanisms on target cells are highlighted. The biological activities of "green" AuNPs (antimicrobial, anticancer, antiviral, etc.) and the possibilities of their further biomedical application are also discussed.
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Affiliation(s)
- Ekaterina O Mikhailova
- Institute of Innovation Management, Kazan National Research Technological University, K. Marx Street 68, 420015 Kazan, Russia
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7
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Arib C, Bouchemal N, Barile M, Paleni D, Djaker N, Dupont N, Spadavecchia J. Flavin-adenine-dinucleotide gold complex nanoparticles: chemical modeling design, physico-chemical assessment and perspectives in nanomedicine. NANOSCALE ADVANCES 2021; 3:6144-6156. [PMID: 36133939 PMCID: PMC9418941 DOI: 10.1039/d1na00444a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/09/2021] [Indexed: 05/10/2023]
Abstract
Flavoproteins play an important role in the regulatory process of cell life, and they are involved in several redox reactions that regulate the metabolism of carbohydrates, amino acids, and lipids. The development of effective drug delivery systems is one of the major challenges in the fight against cancer. This study involves a nanomedicine pathway to encapsulate the cofactor flavin adenine dinucleotide (FAD) using polymeric gold nanoparticles (PEG-AuNPs) through two chemical methods of functionalization (chelation (IN); carbodiimide chemistry (ON)). These hybrid gold nanoparticles and their precursors were characterized by analytical techniques (Raman, UV-Vis, and H1-NMR spectroscopy and transmission electron microscopy (TEM)) which confirmed the grafting of the cofactor agent. The results of the computational studies (Density Functional Theory (DFT)) were in agreement with the experimental observations. We also monitored the interaction of our hybrid nanoparticle systems with small aptamers (APT) in order to validate the hypotheses on the biomolecular mechanisms and also investigate their biological efficiency on pancreatic cancer cells (MIAPaCa-2 cells).
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Affiliation(s)
- Celia Arib
- CNRS, UMR 7244, CSPBAT, Laboratoire de Chimie, Structures et Propriétés de Biomatériaux et d'Agents Thérapeutiques Université Paris 13, Sorbonne Paris Nord, 1 Rue Chablis 93000 Bobigny France
| | - Nadia Bouchemal
- CNRS, UMR 7244, CSPBAT, Laboratoire de Chimie, Structures et Propriétés de Biomatériaux et d'Agents Thérapeutiques Université Paris 13, Sorbonne Paris Nord, 1 Rue Chablis 93000 Bobigny France
| | - Maria Barile
- Dept. of Biosciences, Biotechnology and Biopharmaceutics, University of Bari "Aldo Moro" Via Orabona 470126 Bari Italy
| | | | - Nadia Djaker
- CNRS, UMR 7244, CSPBAT, Laboratoire de Chimie, Structures et Propriétés de Biomatériaux et d'Agents Thérapeutiques Université Paris 13, Sorbonne Paris Nord, 1 Rue Chablis 93000 Bobigny France
| | - Nathalie Dupont
- CNRS, UMR 7244, CSPBAT, Laboratoire de Chimie, Structures et Propriétés de Biomatériaux et d'Agents Thérapeutiques Université Paris 13, Sorbonne Paris Nord, 1 Rue Chablis 93000 Bobigny France
| | - Jolanda Spadavecchia
- CNRS, UMR 7244, CSPBAT, Laboratoire de Chimie, Structures et Propriétés de Biomatériaux et d'Agents Thérapeutiques Université Paris 13, Sorbonne Paris Nord, 1 Rue Chablis 93000 Bobigny France
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8
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Pan Y, Paschoalino WJ, Szuchmacher Blum A, Mauzeroll J. Recent Advances in Bio-Templated Metallic Nanomaterial Synthesis and Electrocatalytic Applications. CHEMSUSCHEM 2021; 14:758-791. [PMID: 33296559 DOI: 10.1002/cssc.202002532] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 12/08/2020] [Indexed: 06/12/2023]
Abstract
Developing metallic nanocatalysts with high reaction activity, selectivity and practical durability is a promising and active subfield in electrocatalysis. In the classical "bottom-up" approach to synthesize stable nanomaterials by chemical reduction, stabilizing additives such as polymers or organic surfactants must be present to cap the nanoparticle to prevent material bulk aggregation. In recent years, biological systems have emerged as green alternatives to support the uncoated inorganic components. One key advantage of biological templates is their inherent ability to produce nanostructures with controllable composition, facet, size and morphology under ecologically friendly synthetic conditions, which are difficult to achieve with traditional inorganic synthesis. In addition, through genetic engineering or bioconjugation, bio-templates can provide numerous possibilities for surface functionalization to incorporate specific binding sites for the target metals. Therefore, in bio-templated systems, the electrocatalytic performance of the formed nanocatalyst can be tuned by precisely controlling the material surface chemistry. With controlled improvements in size, morphology, facet exposure, surface area and electron conductivity, bio-inspired nanomaterials often exhibit enhanced catalytic activity towards electrode reactions. In this Review, recent research developments are presented in bio-approaches for metallic nanomaterial synthesis and their applications in electrocatalysis for sustainable energy storage and conversion systems.
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Affiliation(s)
- Yani Pan
- Department of Chemistry, McGill University, 801 Sherbrooke West, Montreal H3 A 0B8, Quebec, Canada
| | - Waldemir J Paschoalino
- Department of Chemistry, McGill University, 801 Sherbrooke West, Montreal H3 A 0B8, Quebec, Canada
- Department of Analytical Chemistry, Institute of Chemistry, University of Campinas, P.O. Box 6154, 13084-971, Campinas, SP, Brazil
| | - Amy Szuchmacher Blum
- Department of Chemistry, McGill University, 801 Sherbrooke West, Montreal H3 A 0B8, Quebec, Canada
| | - Janine Mauzeroll
- Department of Chemistry, McGill University, 801 Sherbrooke West, Montreal H3 A 0B8, Quebec, Canada
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Al-Ansari MM, Dhasarathan P, Ranjitsingh A, Al-Humaid LA. Ganoderma lucidum inspired silver nanoparticles and its biomedical applications with special reference to drug resistant Escherichia coli isolates from CAUTI. Saudi J Biol Sci 2020; 27:2993-3002. [PMID: 33100858 PMCID: PMC7569111 DOI: 10.1016/j.sjbs.2020.09.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 11/25/2022] Open
Abstract
In the search for alternative therapy for infections and other ailments, metallic nanoparticles, mainly silver nanoparticles (AgNPs) synthesized through bioengineered sources are extensively explored. Fungal bioactive compounds and their nanoparticles were reported with the potential biomedical application. A medicinal mushroom Ganoderma lucidum was reported as a repository of rich medicinal properties. In the current study, silver nanoparticles were synthesized using the extracts of G. lucidum and its antimicrobial activity was tested against drug-resistant Escherichia coli isolated from the catheter used for urinary tract infection (CAUTI). The GC-MS study of G. lucidum extracts showed the presence of ethyl acetoacetate ethylene acetal with the highest area percentage of 72.2% and retention time (RT 5873). Pyridine-3-ol is the second primary compound with a peak height of 6.44% and a retention time of 2.143. The third compound is l,4-Dioxane-2,3-diol, with an area of 8.09% and RT 5450. Butylated Hydroxy Toluene [BHT] is the fourth major compound with an area of 3.32%, and 9-Cedranone constitutes the fifth position in occupying the area percentage [1.88] and height 1.56%. Pyrrole is the sixth primary compound registering an area size of 0.96% and height 2.06%. The AgNPs synthesized using G. lucidum extract were in size range 23 and 58 nm as per SEM analysis and within the range wavelength 0.556-0.796 nm as per UV-Vis spectral study. FTIR Spectroscopy and X-ray diffraction analysis (XRD) were made to characterize the formed nanoparticles. The AgNPs synthesized effectively inhibited the growth of E. coli isolated from catheter-associated urinary tract infection and showed resistance to many drugs. The antioxidant potential of the synthesized nanoparticles assessed using DPPH radical scavenging activity, EC50 (µg/ml), and ARP data showed that the prepared nanoparticles were more potent in free radical scavenging activity than the standard quercetin. The cytotoxicity effect of Ag-NPs on breast cancer cell line- MDA-MB-231 confirmed its anticancer potential. The half-maximal inhibitory concentration (IC50) of Ag-NPs to inhibit 50% of the tumor was 9.2 g/mL. The synthesized GL-AgNPs was exhibited a multifocal biomedical potential.
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Affiliation(s)
- Mysoon M. Al-Ansari
- Department of Botany and Microbiology, Female Campus, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - P. Dhasarathan
- Department of Biotechnology, Prathyusha Engineering College, Chennai 600056, India
| | - A.J.A. Ranjitsingh
- Department of Biotechnology, Prathyusha Engineering College, Chennai 600056, India
| | - Latifah A. Al-Humaid
- Department of Botany and Microbiology, Female Campus, College of Science, King Saud University, Riyadh, Saudi Arabia
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Orizola J, Ríos-Silva M, Muñoz-Villagrán C, Vargas E, Vásquez C, Arenas F. In vitro biosynthesis of Ag, Au and Te-containing nanostructures by Exiguobacterium cell-free extracts. BMC Biotechnol 2020; 20:29. [PMID: 32471409 PMCID: PMC7260758 DOI: 10.1186/s12896-020-00625-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 05/21/2020] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND The bacterial genus Exiguobacterium includes several species that inhabit environments with a wide range of temperature, salinity, and pH. This is why the microorganisms from this genus are known generically as polyextremophiles. Several environmental isolates have been explored and characterized for enzyme production as well as for bioremediation purposes. In this line, toxic metal(loid) reduction by these microorganisms represents an approach to decontaminate soluble metal ions via their transformation into less toxic, insoluble derivatives. Microbial-mediated metal(loid) reduction frequently results in the synthesis of nanoscale structures-nanostructures (NS) -. Thus, microorganisms could be used as an ecofriendly way to get NS. RESULTS We analyzed the tolerance of Exiguobacterium acetylicum MF03, E. aurantiacum MF06, and E. profundum MF08 to Silver (I), gold (III), and tellurium (IV) compounds. Specifically, we explored the ability of cell-free extracts from these bacteria to reduce these toxicants and synthesize NS in vitro, both in the presence or absence of oxygen. All isolates exhibited higher tolerance to these toxicants in anaerobiosis. While in the absence of oxygen they showed high tellurite- and silver-reducing activity at pH 9.0, whereas AuCl4- which was reduced at pH 7.0 in both conditions. Given these results, cell-free extracts were used to synthesize NS containing silver, gold or tellurium, characterizing their size, morphology and chemical composition. Silver and tellurium NS exhibited smaller size under anaerobiosis and their morphology was circular (silver NS), starred (tellurium NS) or amorphous (gold NS). CONCLUSIONS This nanostructure-synthesizing ability makes these isolates interesting candidates to get NS with biotechnological potential.
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Affiliation(s)
- Javier Orizola
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Mirtha Ríos-Silva
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile.,Departamento de Ciencias Nucleares, Comisión Chilena de Energía Nuclear, Santiago, Chile
| | - Claudia Muñoz-Villagrán
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Esteban Vargas
- Center for the Development of Nanoscience and Nanotechnology, Santiago, Chile
| | - Claudio Vásquez
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Felipe Arenas
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile.
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Trifonov A, Stemmer A, Tel-Vered R. Enzymatic self-wiring in nanopores and its application in direct electron transfer biofuel cells. NANOSCALE ADVANCES 2019; 1:347-356. [PMID: 36132446 PMCID: PMC9473223 DOI: 10.1039/c8na00177d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 09/05/2018] [Indexed: 06/01/2023]
Abstract
A synthetic enzymatic activity in nanopores leading to the direct fabrication of modified electrodes applicable as biosensors and/or biofuel cell elements is reported. We demonstrate the heterogeneous enzymatic implanting of platinum nanoclusters, PtNCs, in glucose oxidase, GOx, immobilized on mesoporous carbon nanoparticles, MPCNP-modified surface. As the pores confine the growth of the clusters, the PtNC@GOx/MPCNP assembly becomes electrically wired to the matrix, demonstrating direct electron transfer, DET, bioelectrocatalytic properties that correlate with the applied duration of synthesis and cluster size. This inside-out nanocluster growth from the cofactor to the matrix is investigated and further compared to a reversed outside-in strategy which follows the electrochemical deposition of the Pt clusters inside the pores and their electrically induced expansion towards the FAD center of the enzyme. While the inside-out and outside-in methodologies provide, for the first time, synthetic bidirectional direct wiring routes of an enzyme to a surface, we highlight an asymmetry in the wiring efficiency associated with the different assemblies. The results indicate the existence of a shorter gap between the FAD cofactor and the PtNCs in the enzymatically implanted assembly, resulting in elevated bioelectrocatalytic currents, lower overpotential, and a higher turnover rate, 2580 e- s-1. The implanted assembly is then coupled to a bilirubin oxidase-adsorbed MPCNP cathode to yield an all-DET biofuel cell. Due to the superior electrical contact of the inside-out-synthesized anode, this cell demonstrates enhanced discharge potential and power outputs as compared to similar systems employing electrochemically synthesized outside-in-grown PtNC-GOx/MPCNPs or even GOx-modified MPCNPs diffusionally mediated by ferrocenemethanol.
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Affiliation(s)
- Alexander Trifonov
- Nanotechnology Group, ETH Zürich Säumerstrasse 4 CH-8803 Rüschlikon Switzerland
| | - Andreas Stemmer
- Nanotechnology Group, ETH Zürich Säumerstrasse 4 CH-8803 Rüschlikon Switzerland
| | - Ran Tel-Vered
- Nanotechnology Group, ETH Zürich Säumerstrasse 4 CH-8803 Rüschlikon Switzerland
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12
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Contreras F, Vargas E, Jiménez K, Muñoz-Villagrán C, Figueroa M, Vásquez C, Arenas F. Reduction of Gold (III) and Tellurium (IV) by Enterobacter cloacae MF01 Results in Nanostructure Formation Both in Aerobic and Anaerobic Conditions. Front Microbiol 2018; 9:3118. [PMID: 30619192 PMCID: PMC6305273 DOI: 10.3389/fmicb.2018.03118] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Accepted: 12/03/2018] [Indexed: 12/22/2022] Open
Abstract
Microorganism survival in the presence of toxic substances such as metal(loid)s lies chiefly on their ability to resist (or tolerate) such elements through specific resistance mechanisms. Among them, toxicant reduction has attracted the attention of researchers because metal(loid)-reducing bacteria are being used to recover and/or decontaminate polluted sites. Particularly, our interest is to analyze the toxicity of gold and tellurium compounds for the environmental microorganism Enterobacter cloacae MF01 and also to explore the generation of nanostructures to be used in future biotechnological processes. Resistance of E. cloacae MF01 to gold and tellurium salts as well as the putative mechanisms involved -both in aerobic and anaerobic growth conditions- was evaluated. These metal(loid)s were selected because of their potential application in biotechnology. Resistance to auric tetrachloride acid (HAuCl4) and potassium tellurite (K2TeO3) was assessed by determining areas of growth inhibition, minimum inhibitory concentrations, and growth curves as well as by viability tests. E. cloacae MF01 exhibited higher resistance to HAuCl4 and K2TeO3 under aerobic and anaerobic conditions, respectively. In general, their toxicity is mediated by the generation of reactive oxygen species and by a decrease of intracellular reduced thiols (RSH). To assess if resistance implies toxicant reduction, intra- and extra-cellular toxicant-reducing activities were evaluated. While E. cloacae MF01 exhibited intra- and extra-cellular HAuCl4-reducing activity, tellurite reduction was observed only intracellularly. Then, Au- and Te-containing nanostructures (AuNS and TeNS, respectively) were synthesized using crude extracts from E. cloacae MF01 and their size, morphology, and chemical composition was evaluated.
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Affiliation(s)
- Fernanda Contreras
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Esteban Vargas
- Center for the Development of Nanoscience and Nanotechnology, Santiago, Chile
| | - Karla Jiménez
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Claudia Muñoz-Villagrán
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile.,Departamento de Ciencias Básicas, Facultad de Ciencias, Universidad Santo Tomás, Santiago, Chile
| | - Maximiliano Figueroa
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Claudio Vásquez
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Felipe Arenas
- Laboratorio Microbiología Molecular, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
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Nemeth R, Neubert M, Butz ZJ, Ni TW, Ackerson CJ. Metalloid Reductase of Pseudomonas moravenis Stanleyae Conveys Nanoparticle Mediated Metalloid Tolerance. ACS OMEGA 2018; 3:14902-14909. [PMID: 30533575 PMCID: PMC6275949 DOI: 10.1021/acsomega.8b00826] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Accepted: 08/17/2018] [Indexed: 06/09/2023]
Abstract
A glutathione reductase (GSHR)-like enzyme in Pseudomonas moraviensis stanleyae was previously implicated as underlying the bacterium's remarkable SeO3 2- tolerance. Herein, this enzyme is sequenced, recombinantly expressed, and fully characterized. The enzyme is highly adapted for selenodiglutathione substrates (K m = 336 μM) compared to oxidized glutathione (K m = 8.22 mM). The recombinant expression of this enzyme in the laboratory strains of Escherichia coli conveys a 10-fold increase in IC90 for SeO3 2-. Moreover, selenium nanoparticles are observed when the enzyme is overexpressed in the cells exposed to SeO3 2-, but not in the corresponding no-enzyme controls. The analyses of the structural homology models of the enzyme reveal changes in the parts of the enzyme associated with product release, which may underlie the Se substrate specialization. Combined, the observations of adaptation to Se reduction over oxidized glutathione reduction as well as the portability of this nanoparticle-mediated SeO3 2- tolerance into other cell lines suggest that the P. moraviensis GSHR may be better described as a GSHR-like metalloid reductase.
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Affiliation(s)
- Richard Nemeth
- Department of Chemistry, Colorado
State University, Fort Collins, Colorado 80523, United States
| | | | - Zachary J. Butz
- Department of Chemistry, Colorado
State University, Fort Collins, Colorado 80523, United States
| | | | - Christopher J. Ackerson
- Department of Chemistry, Colorado
State University, Fort Collins, Colorado 80523, United States
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14
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El Enshasy HA, El Marzugi NA, Elsayed EA, Ling OM, Malek RA, Kepli AN, Othman NZ, Ramli S. Medical and Cosmetic Applications of Fungal Nanotechnology: Production, Characterization, and Bioactivity. FUNGAL NANOBIONICS: PRINCIPLES AND APPLICATIONS 2018:21-59. [DOI: 10.1007/978-981-10-8666-3_2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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15
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Krishnan S, Narayan S, Chadha A. Whole resting cells vs. cell free extracts of Candida parapsilosis ATCC 7330 for the synthesis of gold nanoparticles. AMB Express 2016; 6:92. [PMID: 27718213 PMCID: PMC5055519 DOI: 10.1186/s13568-016-0268-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 10/03/2016] [Indexed: 11/10/2022] Open
Abstract
The cell free extracts of Candida parapsilosis ATCC 7330 are more efficient than the whole resting cells of the yeast in the synthesis of directly usable gold nanoparticles as revealed by this systematic study. Cell free extracts yielded gold nanoparticles of hydrodynamic diameter (50-200 nm). In this study, the total protein concentration influences the nanofabrication and not only the reductase enzymes as originally thought. Powder X-ray diffraction studies confirm the crystalline nature of the gold nanoparticles. Fourier Transform Infra Red spectroscopy and thermal gravimetric analysis suggests that the biosynthesized gold nanoparticles are capped by peptides/proteins. Dispersion experiments indicate a stable dispersion of gold nanoparticles in pH 12 solutions which is also confirmed by electron microscopic analysis and validated using a surface plasmon resonance assay. The effectiveness of the dispersed nanoparticles for the reduction of 4-nitrophenol using sodium borohydride as a reductant further confirms the formation of functional gold nanoparticles. It is also reported that gold nanoparticles with mean particle diameter of 27 nm are biosynthesized inside the whole cell by transmission electron microscopy analysis. With optimized reaction conditions, maximum gold bioaccumulation with the 24 h culture age of the yeast with cellular uptake of ~1010 gold atoms at the single cell level is achieved but it is not easy to extract the gold nanoparticles from the whole resting cells.
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Affiliation(s)
- Saravanan Krishnan
- Laboratory of Bioorganic Chemistry, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
| | - Shoba Narayan
- Laboratory of Bioorganic Chemistry, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
- Faculty of Allied Health Sciences, Chettinad Academy of Research and Education, Kelambakkam, Chennai, India
| | - Anju Chadha
- Laboratory of Bioorganic Chemistry, Department of Biotechnology, Indian Institute of Technology Madras, Chennai, India
- National Center for Catalysis Research, Indian Institute of Technology Madras, Chennai, India
- Centre for NEMS and Nanophotonics, Indian Institute of Technology Madras, Chennai, India
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16
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Li J, Li Q, Ma X, Tian B, Li T, Yu J, Dai S, Weng Y, Hua Y. Biosynthesis of gold nanoparticles by the extreme bacterium Deinococcus radiodurans and an evaluation of their antibacterial properties. Int J Nanomedicine 2016; 11:5931-5944. [PMID: 27877039 PMCID: PMC5108609 DOI: 10.2147/ijn.s119618] [Citation(s) in RCA: 74] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Deinococcus radiodurans is an extreme bacterium known for its high resistance to stresses including radiation and oxidants. The ability of D. radiodurans to reduce Au(III) and biosynthesize gold nanoparticles (AuNPs) was investigated in aqueous solution by ultraviolet and visible (UV/Vis) absorption spectroscopy, electron microscopy, X-ray diffraction (XRD), dynamic light scattering (DLS), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). D. radiodurans efficiently synthesized AuNPs from 1 mM Au(III) solution in 8 h. The AuNPs were of spherical, triangular and irregular shapes with an average size of 43.75 nm and a polydispersity index of 0.23 as measured by DLS. AuNPs were distributed in the cell envelope, across the cytosol and in the extracellular space. XRD analysis confirmed the crystallite nature of the AuNPs from the cell supernatant. Data from the FTIR and XPS showed that upon binding to proteins or compounds through interactions with carboxyl, amine, phospho and hydroxyl groups, Au(III) may be reduced to Au(I), and further reduced to Au(0) with the capping groups to stabilize the AuNPs. Biosynthesis of AuNPs was optimized with respect to the initial concentration of gold salt, bacterial growth period, solution pH and temperature. The purified AuNPs exhibited significant antibacterial activity against both Gram-negative (Escherichia coli) and Gram-positive (Staphylococcus aureus) bacteria by damaging their cytoplasmic membrane. Therefore, the extreme bacterium D. radiodurans can be used as a novel bacterial candidate for efficient biosynthesis of AuNPs, which exhibited potential in biomedical application as an antibacterial agent.
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Affiliation(s)
- Jiulong Li
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Qinghao Li
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Xiaoqiong Ma
- Central Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Bing Tian
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Tao Li
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Jiangliu Yu
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Shang Dai
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Yulan Weng
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
| | - Yuejin Hua
- Key Laboratory for Nuclear-Agricultural Sciences of Chinese Ministry of Agriculture and Zhejiang Province, Institute of Nuclear-Agricultural Sciences, Zhejiang University
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17
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Arenas-Salinas M, Vargas-Pérez JI, Morales W, Pinto C, Muñoz-Díaz P, Cornejo FA, Pugin B, Sandoval JM, Díaz-Vásquez WA, Muñoz-Villagrán C, Rodríguez-Rojas F, Morales EH, Vásquez CC, Arenas FA. Flavoprotein-Mediated Tellurite Reduction: Structural Basis and Applications to the Synthesis of Tellurium-Containing Nanostructures. Front Microbiol 2016; 7:1160. [PMID: 27507969 PMCID: PMC4960239 DOI: 10.3389/fmicb.2016.01160] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 07/12/2016] [Indexed: 01/24/2023] Open
Abstract
The tellurium oxyanion tellurite (TeO32-) is extremely harmful for most organisms. It has been suggested that a potential bacterial tellurite resistance mechanism would consist of an enzymatic, NAD(P)H-dependent, reduction to the less toxic form elemental tellurium (Te0). To date, a number of enzymes such as catalase, type II NADH dehydrogenase and terminal oxidases from the electron transport chain, nitrate reductases, and dihydrolipoamide dehydrogenase (E3), among others, have been shown to display tellurite-reducing activity. This activity is generically referred to as tellurite reductase (TR). Bioinformatic data resting on some of the abovementioned enzymes enabled the identification of common structures involved in tellurite reduction including vicinal catalytic cysteine residues and the FAD/NAD(P)+-binding domain, which is characteristic of some flavoproteins. Along this line, thioredoxin reductase (TrxB), alkyl hydroperoxide reductase (AhpF), glutathione reductase (GorA), mercuric reductase (MerA), NADH: flavorubredoxin reductase (NorW), dihydrolipoamide dehydrogenase, and the putative oxidoreductase YkgC from Escherichia coli or environmental bacteria were purified and assessed for TR activity. All of them displayed in vitro TR activity at the expense of NADH or NADPH oxidation. In general, optimal reducing conditions occurred around pH 9–10 and 37°C. Enzymes exhibiting strong TR activity produced Te-containing nanostructures (TeNS). While GorA and AhpF generated TeNS of 75 nm average diameter, E3 and YkgC produced larger structures (>100 nm). Electron-dense structures were observed in cells over-expressing genes encoding TrxB, GorA, and YkgC.
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Affiliation(s)
| | - Joaquín I Vargas-Pérez
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Wladimir Morales
- Centro de Bioinformática y Simulación Molecular, Universidad de Talca Talca, Chile
| | - Camilo Pinto
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Pablo Muñoz-Díaz
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Fabián A Cornejo
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Benoit Pugin
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Juan M Sandoval
- Facultad de Ciencias de la Salud e Instituto de Etnofarmacología, Universidad Arturo Prat Iquique, Chile
| | - Waldo A Díaz-Vásquez
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de ChileSantiago, Chile; Facultad de Ciencias de la Salud, Universidad San SebastiánSantiago, Chile
| | - Claudia Muñoz-Villagrán
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Fernanda Rodríguez-Rojas
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Eduardo H Morales
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Claudio C Vásquez
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
| | - Felipe A Arenas
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile Santiago, Chile
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18
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Reducing-Agent-Free Instant Synthesis of Carbon-Supported Pd Catalysts in a Green Leidenfrost Droplet Reactor and Catalytic Activity in Formic Acid Dehydrogenation. Sci Rep 2016; 6:26474. [PMID: 27198855 PMCID: PMC4873793 DOI: 10.1038/srep26474] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 04/29/2016] [Indexed: 11/16/2022] Open
Abstract
The development of green synthesis methods for supported noble metal catalysts remains important challenges to improve their sustainability. Here we first synthesized carbon-supported Pd catalysts in a green Leidenfrost droplet reactor without reducing agents, high-temperature calcination and reduction procedures. When the aqueous solution containing Pd nitrate precursor, carbon support, and water is dripped on a hot plate, vapor layer is formed between a solution droplet and hot surface, which allow the solution droplet to be levitated on the hot surface (Leidenfrost phenomena). Subsequently, Pd nanoparticles can be prepared without reducing agents in a weakly basic droplet reactor created by the Leidenfrost phenomena, and then the as-prepared Pd nanoparticles are loaded on carbon supports during boiling down the droplet on hot surface. Compared to conventional incipient wetness and chemical synthetic methods, the Leidenfrost droplet reactor does not need energy-consuming, time-consuming, and environmentally unfriendly procedures, which leads to much shorter synthesis time, lower carbon dioxide emission, and more ecofriendly process in comparison with conventional synthesis methods. Moreover, the catalysts synthesized in the Leidenfrost droplet reactor provided much better catalytic activity for room-temperature formic acid decomposition than those prepared by the incipient wetness method.
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19
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Akshath US, Bhatt P. Tunneling of redox enzymes to design nano-probes for monitoring NAD(+) dependent bio-catalytic activity. Biosens Bioelectron 2016; 85:240-246. [PMID: 27179565 DOI: 10.1016/j.bios.2016.05.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 05/01/2016] [Accepted: 05/02/2016] [Indexed: 10/21/2022]
Abstract
Monitoring of bio-catalytic events by using nano-probes is of immense interest due to unique optical properties of metal nanoparticles. In the present study, tunneling of enzyme activity was achieved using redox cofactors namely oxidized cytochrome-c (Cyt-c) and Co-enzyme-Q (Co-Q) immobilized on Quantum dots (QDs) which acted as a bio-probe for NAD(+) dependent dehydrogenase catalyzed reaction. We studied how electron transfer from substrate to non-native electron acceptors can differentially modify photoluminescence properties of CdTe QDs. Two probes were designed, QD-Ox-Cyt-c and QD-Ox-Co-Q, which were found to quench the fluorescence of QDs. However, formaldehyde dehydrogenase (FDH) catalyzed reduction of Cyt-c and Co-Q on the surface of QDs lead to fluorescence turn-on of CdTe QDs. This phenomenon was successfully used for the detection of HCHO in the range of 0.01-100,000ng/mL (LOD of 0.01ng/mL) using both QD-Ox-Cyt-c (R(2)=0.93) and QD-Ox-Co-Q (R(2)=0.96). Further probe performance and stability in samples like milk, wine and fruit juice matrix were studied and we could detect HCHO in range of 0.001-100,000ng/mL (LOD of 0.001ng/mL) with good stability and sensitivity of probe in real samples (R(2)=0.97). Appreciable recovery and detection sensitivity in the presence of metal ions suggests that the developed nano-probes can be used successfully for monitoring dehydrogenase based bio-catalytic events even in the absence of NAD(+). Proposed method is advantageous over classical methods as clean up/ derivatization of samples is not required for formaldehyde detection.
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Affiliation(s)
- Uchangi Satyaprasad Akshath
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India; Microbiology & Fermentation Technology Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India
| | - Praveena Bhatt
- Academy of Scientific and Innovative Research (AcSIR), CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India; Microbiology & Fermentation Technology Department, CSIR-Central Food Technological Research Institute (CFTRI), Mysuru 570020, India.
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20
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Talekar S, Joshi A, Chougle R, Nakhe A, Bhojwani R. Immobilized enzyme mediated synthesis of silver nanoparticles using cross-linked enzyme aggregates (CLEAs) of NADH-dependent nitrate reductase. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.nanoso.2016.03.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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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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22
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Baumann V, Habeeb Muhammed MA, Blanch AJ, Dey P, Rodríguez-Fernández J. Biomolecules in Metal and Semiconductor Nanoparticle Growth. Isr J Chem 2015. [DOI: 10.1002/ijch.201500031] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Gómez-Anquela C, García-Mendiola T, Abad JM, Pita M, Pariente F, Lorenzo E. Scaffold electrodes based on thioctic acid-capped gold nanoparticles coordinated Alcohol Dehydrogenase and Azure A films for high performance biosensor. Bioelectrochemistry 2015; 106:335-42. [PMID: 26152878 DOI: 10.1016/j.bioelechem.2015.06.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Revised: 06/19/2015] [Accepted: 06/21/2015] [Indexed: 10/23/2022]
Abstract
Nanometric size gold nanoparticles capped with thiotic acid are used to coordinate with the Zn (II) present in the catalytic center of Alcohol Dehydrogenase (ADH). In combination with the NADH oxidation molecular catalyst Azure A, electrografted onto carbon screen-printed electrodes, they are used as scaffold electrodes for the construction of a very efficient ethanol biosensor. The final biosensing device exhibits a highly efficient ethanol oxidation with low overpotential of -0.25 V besides a very good analytical performance with a detection limit of 0.14±0.01 μM and a stable response for more than one month.
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Affiliation(s)
- C Gómez-Anquela
- Department of Analytical Chemistry, Universidad Autónoma de Madrid, 28049, Spain.
| | - T García-Mendiola
- Department of Analytical Chemistry, Universidad Autónoma de Madrid, 28049, Spain.
| | - José M Abad
- Department of Analytical Chemistry, Universidad Autónoma de Madrid, 28049, Spain.
| | - M Pita
- Instituto de Catalisis y Petroleoquimica, CSIC. C/ Marie Curie, 2, L10., 28049 Madrid, Spain.
| | - F Pariente
- Department of Analytical Chemistry, Universidad Autónoma de Madrid, 28049, Spain.
| | - E Lorenzo
- Department of Analytical Chemistry, Universidad Autónoma de Madrid, 28049, Spain; IMDEA Nanociencia, Madrid, Spain.
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Rathinaraj P, Al-Jumaily AM, Huh DS. Internalization: acute apoptosis of breast cancer cells using herceptin-immobilized gold nanoparticles. BREAST CANCER-TARGETS AND THERAPY 2015; 7:51-8. [PMID: 25709498 PMCID: PMC4330001 DOI: 10.2147/bctt.s69834] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Herceptin, the monoclonal antibody, was successfully immobilized on gold nanoparticles (GNPs) to improve their precise interactions with breast cancer cells (SK-BR3). The mean size of the GNPs (29 nm), as determined by dynamic light scattering, enlarged to 82 nm after herceptin immobilization. The in vitro cell culture experiment indicated that human skin cells (FB) proliferated well in the presence of herceptin-conjugated GNP (GNP–Her), while most of the breast cancer cells (SK-BR3) had died. To elucidate the mechanism of cell death, the interaction of breast cancer cells with GNP–Her was tracked by confocal laser scanning microscopy. Consequently, GNP–Her was found to be bound precisely to the membrane of the breast cancer cell, which became almost saturated after 6 hours incubation. This shows that the progression signal of SK-BR3 cells is retarded completely by the precise binding of antibody to the human epidermal growth factor receptor 2 receptor of the breast cancer cell membrane, causing cell death.
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Affiliation(s)
- Pierson Rathinaraj
- Institute of Biomedical Technologies, Auckland University of Technology, Auckland, New Zealand
| | - Ahmed M Al-Jumaily
- Institute of Biomedical Technologies, Auckland University of Technology, Auckland, New Zealand
| | - Do Sung Huh
- Department of Nano science and Engineering, Inje University, Gimhea, South Korea
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25
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Glutathione reductase-mediated synthesis of tellurium-containing nanostructures exhibiting antibacterial properties. Appl Environ Microbiol 2014; 80:7061-70. [PMID: 25193000 DOI: 10.1128/aem.02207-14] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Tellurium, a metalloid belonging to group 16 of the periodic table, displays very interesting physical and chemical properties and lately has attracted significant attention for its use in nanotechnology. In this context, the use of microorganisms for synthesizing nanostructures emerges as an eco-friendly and exciting approach compared to their chemical synthesis. To generate Te-containing nanostructures, bacteria enzymatically reduce tellurite to elemental tellurium. In this work, using a classic biochemical approach, we looked for a novel tellurite reductase from the Antarctic bacterium Pseudomonas sp. strain BNF22 and used it to generate tellurium-containing nanostructures. A new tellurite reductase was identified as glutathione reductase, which was subsequently overproduced in Escherichia coli. The characterization of this enzyme showed that it is an NADPH-dependent tellurite reductase, with optimum reducing activity at 30°C and pH 9.0. Finally, the enzyme was able to generate Te-containing nanostructures, about 68 nm in size, which exhibit interesting antibacterial properties against E. coli, with no apparent cytotoxicity against eukaryotic cells.
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26
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Biogenic growth of alloys and core-shell nanostructures using urease as a nanoreactor at ambient conditions. Sci Rep 2014; 3:2601. [PMID: 24018831 PMCID: PMC3767949 DOI: 10.1038/srep02601] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 08/20/2013] [Indexed: 12/04/2022] Open
Abstract
Biomineralization is an extremely efficient biologically guided process towards the advancement of nano-bio integrated materials. As a prime module of the natural world, enzymes are expected to play a major role in biogenic growth of inorganic nanostructures. Although there have been developments in designing enzyme-responsive nanoparticle systems or generation of inorganic nanostructures in an enzyme-stimulated environment, reports regarding action of enzymes as reducing agents themselves for the growth of inorganic nanoparticles still remains elusive. Here we present a mechanistic investigation towards the synthesis of metal and metallic alloy nanoparticles using a commonly investigated enzyme, Jack bean urease (JBU), as a reducing as well as stabilizing agent under physiological conditions. The catalytic functionality of urease was taken advantage of towards the development of metal-ZnO core-shell nanocomposites, making urease an ideal bionanoreactor for synthesizing higher order nanostructures such as alloys and core- shell under ambient conditions.
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27
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Pseudomonas seleniipraecipitans proteins potentially involved in selenite reduction. Curr Microbiol 2014; 69:69-74. [PMID: 24604150 DOI: 10.1007/s00284-014-0555-2] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 01/14/2014] [Indexed: 10/25/2022]
Abstract
Pseudomonas seleniipraecipitans grows in the presence of high levels of selenite and selenate and reduces both oxyanions to elemental selenium (Se(0)), a property that may make P. seleniipraecipitans useful as an inoculant for biobarriers designed to remove selenite or selenate from ground or surface waters. An earlier study showed that P. seleniipraecipitans nitrate reductase reduced selenate to Se(0), but failed to identify the protein(s) involved in selenite reduction. This study used ammonium sulfate precipitation, hydrophobic interaction chromatography, and native PAGE to isolate two electrophoretic gel regions, identified as bands A and B that showed selenite-reductase-activity. Proteomics was used to identify the proteins present in those regions. Glutathione reductase (GR) was detected in the A-band; based on this information, Saccharomyces cerevisiae GR, obtained from a commercial source, was evaluated and found to have selenite-reductase-activity, confirming that GR can reduce selenite to Se(0). Proteomics was also used to detect the proteins present in the B-band and thioredoxin reductase (ThxR) was detected as a B-band protein; based on this information, E. coli ThxR, obtained from a commercial source, was evaluated and found to have selenite-reductase-activity, confirming that ThxR can reduce selenite to elemental selenium. Thus, evidence presented in this study shows that S. cerevisiae GR and E. coli ThxR can reduce SeO3 (2-) to Se(0) and strongly suggests that P. seleniipraecipitans GR and ThxR can also reduce SeO3 (2-) to Se(0).
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28
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Bera K, Baksi S, Nag M, Bera SC, Mukhopadhyay D, Basak S. A multicolor fluorescent peptide–nanoparticle scaffold: real time uptake and distribution in neuronal cells. NEW J CHEM 2014. [DOI: 10.1039/c4nj00265b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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29
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An electrochemical glutathione biosensor: Ubiquinone as a transducer. Talanta 2013; 110:15-20. [DOI: 10.1016/j.talanta.2013.03.038] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 03/09/2013] [Accepted: 03/14/2013] [Indexed: 11/20/2022]
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Wang J, Zhang G, Li Q, Jiang H, Liu C, Amatore C, Wang X. In vivo self-bio-imaging of tumors through in situ biosynthesized fluorescent gold nanoclusters. Sci Rep 2013; 3:1157. [PMID: 23362457 PMCID: PMC3557452 DOI: 10.1038/srep01157] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 12/11/2012] [Indexed: 12/15/2022] Open
Abstract
Fluorescence imaging in vivo allows non-invasive tumor diagnostic thus permitting a direct monitoring of cancer therapies progresses. It is established herein that fluorescent gold nanoclusters are spontaneously biosynthesized by cancerous cell (i.e., HepG2, human hepatocarcinoma cell line; K562, leukemia cell line) incubated with micromolar chloroauric acid solutions, a biocompatible molecular Au(III) species. Gold nanoparticles form by Au(III) reduction inside cells cytoplasms and ultimately concentrate around their nucleoli, thus affording precise cell imaging. Importantly, this does not occur in non-cancerous cells, as evidenced with human embryo liver cells (L02) used as controls. This dichotomy is exploited for a new strategy for in vivo self-bio-imaging of tumors. Subcutaneous injections of millimolar chloroauric acid solution near xenograft tumors of the nude mouse model of hepatocellular carcinoma or chronic myeloid leukemia led to efficient biosynthesis of fluorescent gold nanoclusters without significant dissemination to the surrounding normal tissues, hence allowing specific fluorescent self-bio-marking of the tumors.
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Affiliation(s)
- Jianling Wang
- State Key Laboratory of Bioelectronics-Chien-Shiung Wu Lab, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
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Das SK, Liang J, Schmidt M, Laffir F, Marsili E. Biomineralization mechanism of gold by zygomycete fungi Rhizopus oryzae. ACS NANO 2012; 6:6165-73. [PMID: 22708541 DOI: 10.1021/nn301502s] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In recent years, there has been significant progress in the biological synthesis of nanomaterials. However, the molecular mechanism of gold biomineralization in microorganisms of industrial relevance remains largely unexplored. Here we describe the biosynthesis mechanism of gold nanoparticles (AuNPs) in the fungus Rhizopus oryzae . Reduction of AuCl(4)(-) [Au(III)] to nanoparticulate Au(0) (AuNPs) occurs in both the cell wall and cytoplasmic region of R. oryzae . The average size of the as-synthesized AuNPs is ~15 nm. The biomineralization occurs through adsorption, initial reduction to Au(I), followed by complexation [Au(I) complexes], and final reduction to Au(0). Subtoxic concentrations (up to 130 μM) of AuCl(4)(-) in the growth medium increase growth of R. oryzae and induce two stress response proteins while simultaneously down-regulating two other proteins. The induction increases mycelial growth, protein yield, and AuNP biosynthesis. At higher Au(III) concentrations (>130 μM), both mycelial and protein yield decrease and damages to the cellular ultrastructure are observed, likely due to the toxic effect of Au(III). Protein profile analysis also confirms the gold toxicity on R. oryzae at high concentrations. Sodium dodecyl sulfate polyacrylamide gel electrophoresis analysis shows that two proteins of 45 and 42 kDa participate in gold reduction, while an 80 kDa protein serves as a capping agent in AuNP biosynthesis.
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Affiliation(s)
- Sujoy K Das
- School of Biotechnology, National Centre for Sensor Research, Dublin City University, Dublin 9, Ireland.
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Kim S, Kim Y, Ko Y, Cho J. Electrochemical sensors based on porous nanocomposite films with weak polyelectrolyte-stabilized gold nanoparticles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10560d] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Virkutyte J, Varma RS. Green synthesis of metal nanoparticles: Biodegradable polymers and enzymes in stabilization and surface functionalization. Chem Sci 2011. [DOI: 10.1039/c0sc00338g] [Citation(s) in RCA: 299] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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Cui R, Zhang MX, Tian ZQ, Zhang ZL, Pang DW. Intermediate-dominated controllable biomimetic synthesis of gold nanoparticles in a quasi-biological system. NANOSCALE 2010; 2:2120-2125. [PMID: 20820640 DOI: 10.1039/c0nr00193g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A new biomimetic strategy of creating a quasi-biological system (an aqueous solution containing electrolytes, peptide, enzyme and coenzyme) for the preparation of gold nanoparticles with uniform and tunable sizes has been put forward and validated, adopting environmentally-friendly reducing agents and a biocompatible capping ligand in aqueous solution at room temperature. The biomimetic synthetic route has the characteristics for good stability of the resulting AuNPs capped with glutathione via strong Au-S bond in aqueous solution, an appropriate composition of the intermediate with a redox potential favorable for the biomimetic reduction under mild conditions, suitable pH values to adjust the rate of the reduction, and the addition of enzyme catalyzing the reduction. By only adjusting the concentration of the reducing agent NADPH, a series of AuNPs with narrow size-distribution could be controllably synthesized. This method of rational utilization of biological processes could provide a new way for the sustainable development of nanotechnology.
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Affiliation(s)
- Ran Cui
- Key Laboratory of Analytical Chemistry for Biology and Medicine Ministry of Education, College of Chemistry and Molecular Sciences, and State Key Laboratory of Virology, Wuhan University, Wuhan 430072, PR China
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Kim S, Park J, Cho J. Layer-by-layer assembled multilayers using catalase-encapsulated gold nanoparticles. NANOTECHNOLOGY 2010; 21:375702. [PMID: 20724775 DOI: 10.1088/0957-4484/21/37/375702] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We introduce a novel and versatile approach for the preparation of multilayers, based on catalase-encapsulated gold nanoparticles (CAT-Au(NP)), allowing electrostatic charge reversal and structural transformation through pH adjustment. CAT-Au(NP), which are synthesized directly from CAT stabilizer, can be electrostatically assembled with anionic and cationic PEs as a result of the charge reversal of the catalase stabilizers through pH control. In particular, at pH 5.2, near the pI of catalase, dispersed CAT-Au(NP) are structurally transformed into colloidal or network CAT-Au(NP) nanocomposites. Furthermore, we demonstrate that the layer-by-layer assembled multilayers composed of PEs and CAT-Au(NP) induce an effective electron transfer between CAT and the electrode as well as a high loading of CAT and Au(NP), and resultantly exhibit a highly catalytic activity toward H(2)O(2).
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Affiliation(s)
- Sungwoo Kim
- School of Advanced Materials Engineering, Kookmin University, Seoul, Korea
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Luckarift H, Ivnitski D, Rincón R, Atanassov P, Johnson G. Glucose Oxidase Catalyzed Self-Assembly of Bioelectroactive Gold Nanostructures. ELECTROANAL 2010. [DOI: 10.1002/elan.200980003] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Zuo X, He S, Li D, Peng C, Huang Q, Song S, Fan C. Graphene oxide-facilitated electron transfer of metalloproteins at electrode surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1936-1939. [PMID: 19694425 DOI: 10.1021/la902496u] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Graphene is a particularly useful nanomaterial that has shown great promise in nanoelectronics. Because of the ultrahigh electron mobility of graphene and its unique surface properties such as one-atom thickness and irreversible protein adsorption at surfaces, graphene-based materials might serve as an ideal platform for accommodating proteins and facilitating protein electron transfer. In this work, we demonstrate that graphene oxide (GO) supports the efficient electrical wiring the redox centers of several heme-containing metalloproteins (cytochrome c, myoglobin, and horseradish peroxidase) to the electrode. Importantly, proteins retain their structural intactness and biological activity upon forming mixtures with GO. These important features imply the promising applications of GO/protein complexes in the development of biosensors and biofuel cells.
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Affiliation(s)
- Xiaolei Zuo
- Laboratory of Physical Biology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
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38
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Abad JM, Gass M, Bleloch A, Schiffrin DJ. Direct Electron Transfer to a Metalloenzyme Redox Center Coordinated to a Monolayer-Protected Cluster. J Am Chem Soc 2009; 131:10229-36. [DOI: 10.1021/ja9026693] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jose M. Abad
- Chemistry Department, University of Liverpool, Liverpool L69 7ZD, United Kingdom, and UK SuperSTEM, Daresbury Laboratory, Daresbury, Cheshire WA4 4AD, United Kingdom
| | - Mhairi Gass
- Chemistry Department, University of Liverpool, Liverpool L69 7ZD, United Kingdom, and UK SuperSTEM, Daresbury Laboratory, Daresbury, Cheshire WA4 4AD, United Kingdom
| | - Andrew Bleloch
- Chemistry Department, University of Liverpool, Liverpool L69 7ZD, United Kingdom, and UK SuperSTEM, Daresbury Laboratory, Daresbury, Cheshire WA4 4AD, United Kingdom
| | - David J. Schiffrin
- Chemistry Department, University of Liverpool, Liverpool L69 7ZD, United Kingdom, and UK SuperSTEM, Daresbury Laboratory, Daresbury, Cheshire WA4 4AD, United Kingdom
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Xie J, Zheng Y, Ying JY. Protein-directed synthesis of highly fluorescent gold nanoclusters. J Am Chem Soc 2009; 131:888-9. [PMID: 19123810 DOI: 10.1021/ja806804u] [Citation(s) in RCA: 1676] [Impact Index Per Article: 111.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A simple, one-pot, "green" synthetic route, based on the "biomineralization" capability of a common commercially available protein, bovine serum albumin (BSA), has been developed for the preparation of highly stable Au nanocrystals (NCs) with red emission and high quantum yield.
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Affiliation(s)
- Jianping Xie
- Institute of Bioengineering and Nanotechnology, 31 Biopolis Way, The Nanos, Singapore 138669
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Léger C, Bertrand P. Direct Electrochemistry of Redox Enzymes as a Tool for Mechanistic Studies. Chem Rev 2008; 108:2379-438. [DOI: 10.1021/cr0680742] [Citation(s) in RCA: 594] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wu Q, Cao H, Luan Q, Zhang J, Wang Z, Warner JH, Watt AAR. Biomolecule-assisted synthesis of water-soluble silver nanoparticles and their biomedical applications. Inorg Chem 2008; 47:5882-8. [PMID: 18498157 DOI: 10.1021/ic8002228] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The application of nanoparticles in the biomedical field is an exciting interdisciplinary research area in current materials science. In the present study, size-tunable and water-soluble noble metal silver nanoparticles (Ag NPs) have been successfully synthesized with the assistance of glutathione (GSH). The as-synthesized Ag NPs are ready to bind covalently with a model protein (bovine serum albumin) in mild conditions. The optical property of surface-modifiable Ag NPs was extremely sensitive to their size and the surface modification, suggesting a potential in the biomedical analysis and detection. Furthermore, Ag NPs with an average diameter of ca. 6 nm effectively suppress the proliferation of human leukemic K562 cells in the dose- and time-dependent manners, suggesting the promising potential of Ag NPs in cancer therapy.
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Affiliation(s)
- Qingzhi Wu
- Department of Chemistry, Tsinghua University, Beijing 100084, PR China
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