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Contact guidance of mesenchymal stem cells by flagellin-modified substrates: aspects of cell-surface interaction from the point of view of liquid crystal theory. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2023.131113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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2
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Bacterial Flagellar Filament: A Supramolecular Multifunctional Nanostructure. Int J Mol Sci 2021; 22:ijms22147521. [PMID: 34299141 PMCID: PMC8306008 DOI: 10.3390/ijms22147521] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/06/2021] [Accepted: 07/10/2021] [Indexed: 02/07/2023] Open
Abstract
The bacterial flagellum is a complex and dynamic nanomachine that propels bacteria through liquids. It consists of a basal body, a hook, and a long filament. The flagellar filament is composed of thousands of copies of the protein flagellin (FliC) arranged helically and ending with a filament cap composed of an oligomer of the protein FliD. The overall structure of the filament core is preserved across bacterial species, while the outer domains exhibit high variability, and in some cases are even completely absent. Flagellar assembly is a complex and energetically costly process triggered by environmental stimuli and, accordingly, highly regulated on transcriptional, translational and post-translational levels. Apart from its role in locomotion, the filament is critically important in several other aspects of bacterial survival, reproduction and pathogenicity, such as adhesion to surfaces, secretion of virulence factors and formation of biofilms. Additionally, due to its ability to provoke potent immune responses, flagellins have a role as adjuvants in vaccine development. In this review, we summarize the latest knowledge on the structure of flagellins, capping proteins and filaments, as well as their regulation and role during the colonization and infection of the host.
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Flagellin-based electrochemical sensing layer for arsenic detection in water. Sci Rep 2021; 11:3497. [PMID: 33568718 PMCID: PMC7876115 DOI: 10.1038/s41598-021-83053-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 01/27/2021] [Indexed: 11/08/2022] Open
Abstract
Regular monitoring of arsenic concentrations in water sources is essential due to the severe health effects. Our goal was to develop a rapidly responding, sensitive and stable sensing layer for the detection of arsenic. We have designed flagellin-based arsenic binding proteins capable of forming stable filament structures with high surface binding site densities. The D3 domain of Salmonella typhimurium flagellin was replaced with an arsenic-binding peptide motif of different bacterial ArsR transcriptional repressor factors. We have shown that the fusion proteins developed retain their polymerization ability and have thermal stability similar to that of wild-type filament. The strong arsenic binding capacity of the monomeric proteins was confirmed by isothermal titration calorimetry (ITC), and dissociation constants (Kd) of a few hundred nM were obtained for all three variants. As-binding fibers were immobilized on the surface of a gold electrode and used as a working electrode in cyclic voltammetry (CV) experiments to detect inorganic arsenic near the maximum allowable concentration (MAC) level. Based on these results, it can be concluded that the stable arsenic-binding flagellin variant can be used as a rapidly responding, sensitive, but simple sensing layer in a field device for the MAC-level detection of arsenic in natural waters.
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Reichel VE, Matuszak J, Bente K, Heil T, Kraupner A, Dutz S, Cicha I, Faivre D. Magnetite-Arginine Nanoparticles as a Multifunctional Biomedical Tool. NANOMATERIALS 2020; 10:nano10102014. [PMID: 33066027 PMCID: PMC7600042 DOI: 10.3390/nano10102014] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 10/01/2020] [Accepted: 10/02/2020] [Indexed: 12/15/2022]
Abstract
Iron oxide nanoparticles are a promising platform for biomedical applications, both in terms of diagnostics and therapeutics. In addition, arginine-rich polypeptides are known to penetrate across cell membranes. Here, we thus introduce a system based on magnetite nanoparticles and the polypeptide poly-l-arginine (polyR-Fe3O4). We show that the hybrid nanoparticles exhibit a low cytotoxicity that is comparable to Resovist®, a commercially available drug. PolyR-Fe3O4 particles perform very well in diagnostic applications, such as magnetic particle imaging (1.7 and 1.35 higher signal respectively for the 3rd and 11th harmonic when compared to Resovist®), or as contrast agents for magnetic resonance imaging (R2/R1 ratio of 17 as compared to 11 at 0.94 T for Resovist®). Moreover, these novel particles can also be used for therapeutic purposes such as hyperthermia, achieving a specific heating power ratio of 208 W/g as compared to 83 W/g for Feridex®, another commercially available product. Therefore, we envision such materials to play a role in the future theranostic applications, where the arginine ability to deliver cargo into the cell can be coupled to the magnetite imaging properties and cancer fighting activity.
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Affiliation(s)
- Victoria E. Reichel
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Am Mühlenberg 1, 14476 Potsdam, Germany; (V.E.R.); (K.B.); (T.H.)
- Laboratoire “Matière et Systèmes Complexes” (MSC), UMR 7057 CNRS, Université Paris 7 Diderot, 75205 Paris CEDEX 13, France
| | - Jasmin Matuszak
- Section of Experimental Oncoclogy and Nanomedicine (SEON), ENT Department, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Glückstraße 10a, 91054 Erlangen, Germany; (J.M.); (I.C.)
- Department of Anesthesiology, Kurume University Hospital, Cognitive and MolecularResearch Institute of Brain Diseases, Kurume University, 65-1, Asahimachi, Kurume 830-0011, Japan
| | - Klaas Bente
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Am Mühlenberg 1, 14476 Potsdam, Germany; (V.E.R.); (K.B.); (T.H.)
- Bundesanstalt für Materialforschung und -prüfung, Unter den Eichen 87, 12205 Berlin, Germany
| | - Tobias Heil
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Am Mühlenberg 1, 14476 Potsdam, Germany; (V.E.R.); (K.B.); (T.H.)
| | - Alexander Kraupner
- nanoPET Pharma GmbH, Luisencarrée Robert-Koch-Platz 4, 10115 Berlin, Germany;
| | - Silvio Dutz
- Institute of Biomedical Engineering and Informatics, Technische Universität Ilmenau, PF 100565, 98684 Ilmenau, Germany;
| | - Iwona Cicha
- Section of Experimental Oncoclogy and Nanomedicine (SEON), ENT Department, University Hospital Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Glückstraße 10a, 91054 Erlangen, Germany; (J.M.); (I.C.)
| | - Damien Faivre
- Max Planck Institute of Colloids and Interfaces, Department of Biomaterials, Am Mühlenberg 1, 14476 Potsdam, Germany; (V.E.R.); (K.B.); (T.H.)
- Aix-Marseille Université, CEA, CNRS, BIAM, 13108 Saint Paul lez Durance, France
- Correspondence:
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5
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Labadi Z, Kalas B, Saftics A, Illes L, Jankovics H, Bereczk-Tompa É, Sebestyén A, Tóth É, Kakasi B, Moldovan C, Firtat B, Gartner M, Gheorghe M, Vonderviszt F, Fried M, Petrik P. Sensing Layer for Ni Detection in Water Created by Immobilization of Bioengineered Flagellar Nanotubes on Gold Surfaces. ACS Biomater Sci Eng 2020; 6:3811-3820. [PMID: 33463317 DOI: 10.1021/acsbiomaterials.0c00280] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The environmental monitoring of Ni is targeted at a threshold limit value of 0.34 μM, as set by the World Health Organization. This sensitivity target can usually only be met by time-consuming and expensive laboratory measurements. There is a need for inexpensive, field-applicable methods, even if they are only used for signaling the necessity of a more accurate laboratory investigation. In this work, bioengineered, protein-based sensing layers were developed for Ni detection in water. Two bacterial Ni-binding flagellin variants were fabricated using genetic engineering, and their applicability as Ni-sensitive biochip coatings was tested. Nanotubes of mutant flagellins were built by in vitro polymerization. A large surface density of the nanotubes on the sensor surface was achieved by covalent immobilization chemistry based on a dithiobis(succimidyl propionate) cross-linking method. The formation and density of the sensing layer was monitored and verified by spectroscopic ellipsometry and atomic force microscopy. Cyclic voltammetry (CV) measurements revealed a Ni sensitivity below 1 μM. It was also shown that, even after two months of storage, the used sensors can be regenerated and reused by rinsing in a 10 mM solution of ethylenediaminetetraacetic acid at room temperature.
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Affiliation(s)
- Zoltan Labadi
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Benjamin Kalas
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Andras Saftics
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Levente Illes
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
| | - Hajnalka Jankovics
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Éva Bereczk-Tompa
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Anett Sebestyén
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Éva Tóth
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Balázs Kakasi
- Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Carmen Moldovan
- National Institute for Research & Development in Microtechnologies, Bucharest 077190, Romania
| | - Bogdan Firtat
- National Institute for Research & Development in Microtechnologies, Bucharest 077190, Romania
| | - Mariuca Gartner
- "Ilie Murgulescu" Institute of Physical Chemistry of the Romanian Academy, Bucharest 060021, Romania
| | | | - Ferenc Vonderviszt
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary.,Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Veszprém 8200, Hungary
| | - Miklos Fried
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary.,Institute of Microelectronics and Technology, Óbuda University, Budapest 1034, Hungary
| | - Peter Petrik
- Institute of Technical Physics and Materials Science, Centre for Energy Research, Budapest 1121, Hungary
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Klein Á, Kovács M, Muskotál A, Jankovics H, Tóth B, Pósfai M, Vonderviszt F. Nanobody-Displaying Flagellar Nanotubes. Sci Rep 2018; 8:3584. [PMID: 29483707 PMCID: PMC5832153 DOI: 10.1038/s41598-018-22085-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Accepted: 02/16/2018] [Indexed: 12/02/2022] Open
Abstract
In this work we addressed the problem how to fabricate self-assembling tubular nanostructures displaying target recognition functionalities. Bacterial flagellar filaments, composed of thousands of flagellin subunits, were used as scaffolds to display single-domain antibodies (nanobodies) on their surface. As a representative example, an anti-GFP nanobody was successfully inserted into the middle part of flagellin replacing the hypervariable surface-exposed D3 domain. A novel procedure was developed to select appropriate linkers required for functional internal insertion. Linkers of various lengths and conformational properties were chosen from a linker database and they were randomly attached to both ends of an anti-GFP nanobody to facilitate insertion. Functional fusion constructs capable of forming filaments on the surface of flagellin-deficient host cells were selected by magnetic microparticles covered by target GFP molecules and appropriate linkers were identified. TEM studies revealed that short filaments of 2–900 nm were formed on the cell surface. ITC and fluorescent measurements demonstrated that the fusion protein exhibited high binding affinity towards GFP. Our approach allows the development of functionalized flagellar nanotubes against a variety of important target molecules offering potential applications in biosensorics and bio-nanotechnology.
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Affiliation(s)
- Ágnes Klein
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary
| | - Mátyás Kovács
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary
| | - Adél Muskotál
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary
| | - Hajnalka Jankovics
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary
| | - Balázs Tóth
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary
| | - Mihály Pósfai
- Department of Earth and Environmental Sciences, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary
| | - Ferenc Vonderviszt
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, H-8200, Veszprém, Hungary. .,Research Institute for Technical Physics and Materials Science, Hungarian Academy of Sciences, Konkoly Thege u. 29-33, H-1121, Budapest, Hungary.
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7
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Bereczk-Tompa É, Vonderviszt F, Horváth B, Szalai I, Pósfai M. Biotemplated synthesis of magnetic filaments. NANOSCALE 2017; 9:15062-15069. [PMID: 28967665 DOI: 10.1039/c7nr04842d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
With the aim of creating one-dimensional magnetic nanostructures, we genetically engineered flagellar filaments produced by Salmonella bacteria to display iron- or magnetite-binding sites, and used the mutant filaments as templates for both nucleation and attachment of the magnetic iron oxide magnetite. Although nucleation from solution and attachment of nanoparticles to a pre-existing surface are two different processes, non-classical crystal nucleation pathways have been increasingly recognized in biological systems, and in many cases nucleation and particle attachment cannot be clearly distinguished. In this study we tested the magnetite-nucleating ability of four types of mutant flagella previously shown to be efficient binders of magnetite nanoparticles, and we used two other mutant flagella that were engineered to periodically display known iron-binding oligopeptides on their surfaces. All mutant filaments were demonstrated to be efficient as templates for the synthesis of one-dimensional magnetic nanostructures under ambient conditions. Both approaches resulted in similar final products, with randomly oriented magnetite nanoparticles partially covering the filamentous biological templates. In an external magnetic field, the viscosity of a suspension of the produced magnetic filaments showed a twofold increase relative to the control sample. The results of magnetic susceptibility measurements were also consistent with the magnetic nanoparticles occurring in linear structures. Our study demonstrates that biological templating can be used to produce one-dimensional magnetic nanostructures under benign conditions, and that modified flagellar filaments can be used for creating model systems in which crystal nucleation from solution can be experimentally studied.
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Affiliation(s)
- Éva Bereczk-Tompa
- Department of Earth and Environmental Sciences, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary.
| | - Ferenc Vonderviszt
- Bio-Nanosystems Laboratory, Research Institute of Biomolecular and Chemical Engineering, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary. and Institute of Technical Physics and Materials Science, Centre for Energy Research, Konkoly-Thege u. 29-33, 1121 Budapest, Hungary
| | - Barnabás Horváth
- Institute of Physics and Mechatronics, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary.
| | - István Szalai
- Institute of Physics and Mechatronics, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary.
| | - Mihály Pósfai
- Department of Earth and Environmental Sciences, University of Pannonia, Egyetem u. 10, 8200 Veszprém, Hungary.
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8
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Barber-Zucker S, Zarivach R. A Look into the Biochemistry of Magnetosome Biosynthesis in Magnetotactic Bacteria. ACS Chem Biol 2017; 12:13-22. [PMID: 27930882 DOI: 10.1021/acschembio.6b01000] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Magnetosomes are protein-rich membrane organelles that encapsulate magnetite or greigite and whose chain alignment enables magnetotactic bacteria (MTB) to sense the geomagnetic field. As these bacteria synthesize uniform magnetic particles, their biomineralization mechanism is of great interest among researchers from different fields, from material engineering to medicine. Both magnetosome formation and magnetic particle synthesis are highly controlled processes that can be divided into several crucial steps: membrane invagination from the inner-cell membrane, protein sorting, the magnetosomes' arrangement into chains, iron transport, chemical environment regulation of the magnetosome lumen, magnetic particle nucleation, and finally crystal growth, size, and morphology control. This complex system involves an ensemble of unique proteins that participate in different stages during magnetosome formation, some of which were extensively studied in recent years. Here, we present the current knowledge on magnetosome biosynthesis with a focus on the different proteins and the main biochemical pathways along this process.
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Affiliation(s)
- Shiran Barber-Zucker
- Department of Life
Sciences,
the National Institute for Biotechnology in the Negev and Ilse Katz
Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, 8410501, Israel
| | - Raz Zarivach
- Department of Life
Sciences,
the National Institute for Biotechnology in the Negev and Ilse Katz
Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva, 8410501, Israel
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