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Abstract
Magnetic metal oxide nanoparticles demonstrate great applicability in several fields such as biotechnology, medicine and catalysis. A stable, magnetic and low-cost material, nanoscale magnetite, is an interesting adsorbent for protein purification. Downstream processing can account for up to 80% of the total production costs in biotechnological production. As such, the development of new innovative separation methods can be regarded as highly profitable. While short peptide sequences can be used as specific affinity tags for functionalised adsorber surfaces, they need expensive affinity ligands on the particle surface for adsorption. In order to identify peptide tags for several non-functionalised inorganic surfaces, different binding conditions to iron oxide nanoparticles are evaluated. Therefore, magnetite nanoparticles in a range of 5-20 nm were synthesised with a co-precipitation method. Zeta potential measurements indicated an amphiphilic surface with an isoelectric point in the neutral pH region. Glutamic acid-based homo-peptides were used as affinity peptides for the magnetite nanoparticles. We demonstrate a dependence of the binding affinity of the peptides on pH and buffer ions in two different experimental set-ups. The nature of surface coordination for glutamic acid-based peptides can be demonstrated with different spectroscopic approaches such as infrared spectroscopy (IR), Raman spectroscopy and circular dichroism spectroscopy (CD). We want to emphasise the importance of physicochemical properties such as surface energy, polarity, morphology and charge. These parameters, which are dependent on the environmental conditions, play a crucial role in peptide interactions with iron oxide surfaces. The understanding of the adsorption of simple biomolecules on nanoscale metal oxide surfaces also represents the key to the even more complex interactions of proteins at the bio-nano interface. From the identification of interaction patterns and an understanding of the adsorption of these peptides, the up-scaling to tagged model proteins facilitates the possibility of an industrial magnetic separation process and might therefore reduce time and costs in purification processes.
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Affiliation(s)
- S P Schwaminger
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, Boltzmannstraße 15, Garching, 85748, Germany.
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Schwaminger SP, Fraga-García P, Blank-Shim SA, Straub T, Haslbeck M, Muraca F, Dawson KA, Berensmeier S. Magnetic One-Step Purification of His-Tagged Protein by Bare Iron Oxide Nanoparticles. ACS Omega 2019; 4:3790-3799. [PMID: 31459591 PMCID: PMC6648446 DOI: 10.1021/acsomega.8b03348] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 01/04/2019] [Indexed: 05/21/2023]
Abstract
Magnetic separation is a promising alternative to conventional methods in downstream processing. This can facilitate easier handling, fewer processing steps, and more sustainable processes. Target materials can be extracted directly from crude cell lysates in a single step by magnetic nanoadsorbents with high-gradient magnetic fishing (HGMF). Additionally, the use of hazardous consumables for reducing downstream processing steps can be avoided. Here, we present proof of principle of one-step magnetic fishing from crude Escherichia coli cell lysate of a green fluorescent protein (GFP) with an attached hexahistidine (His6)-tag, which is used as the model target molecule. The focus of this investigation is the upscale to a liter scale magnetic fishing process in which a purity of 91% GFP can be achieved in a single purification step from cleared cell lysate. The binding through the His6-tag can be demonstrated, since no significant binding of nontagged GFP toward bare iron oxide nanoparticles (BIONs) can be observed. Nonfunctionalized BIONs with primary particle diameters of around 12 nm, as used in the process, can be produced with a simple and low-cost coprecipitation synthesis. Thus, HGMF with BIONs might pave the way for a new and greener era of downstream processing.
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Affiliation(s)
- Sebastian P. Schwaminger
- Bioseparation
Engineering Group, Department of Mechanical Engineering and Department of
Chemistry, Technical University of Munich, Garching 85748, Germany
- Centre
for BioNano Interactions, School of Chemistry and Chemical Biology
and Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin D14 YH57, Ireland
| | - Paula Fraga-García
- Bioseparation
Engineering Group, Department of Mechanical Engineering and Department of
Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Silvia A. Blank-Shim
- Bioseparation
Engineering Group, Department of Mechanical Engineering and Department of
Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Tamara Straub
- Bioseparation
Engineering Group, Department of Mechanical Engineering and Department of
Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Martin Haslbeck
- Bioseparation
Engineering Group, Department of Mechanical Engineering and Department of
Chemistry, Technical University of Munich, Garching 85748, Germany
| | - Francesco Muraca
- Centre
for BioNano Interactions, School of Chemistry and Chemical Biology
and Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin D14 YH57, Ireland
| | - Kenneth A. Dawson
- Centre
for BioNano Interactions, School of Chemistry and Chemical Biology
and Conway Institute for Biomolecular and Biomedical Research, University College Dublin, Belfield, Dublin D14 YH57, Ireland
| | - Sonja Berensmeier
- Bioseparation
Engineering Group, Department of Mechanical Engineering and Department of
Chemistry, Technical University of Munich, Garching 85748, Germany
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Schwaminger SP, Blank-Shim SA, Scheifele I, Pipich V, Fraga-García P, Berensmeier S. Design of Interactions Between Nanomaterials and Proteins: A Highly Affine Peptide Tag to Bare Iron Oxide Nanoparticles for Magnetic Protein Separation. Biotechnol J 2018; 14:e1800055. [DOI: 10.1002/biot.201800055] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/16/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Sebastian P. Schwaminger
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich; 85748 Garching bei München Germany
| | - Silvia A. Blank-Shim
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich; 85748 Garching bei München Germany
| | - Isabell Scheifele
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich; 85748 Garching bei München Germany
| | - Vitaliy Pipich
- Jülich Centre for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH; 85748 Garching bei München Germany
| | - Paula Fraga-García
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich; 85748 Garching bei München Germany
| | - Sonja Berensmeier
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich; 85748 Garching bei München Germany
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Blank-Shim SA, Schwaminger SP, Borkowska-Panek M, Anand P, Yamin P, Fraga-García P, Fink K, Wenzel W, Berensmeier S. Binding patterns of homo-peptides on bare magnetic nanoparticles: insights into environmental dependence. Sci Rep 2017; 7:14047. [PMID: 29070786 PMCID: PMC5656586 DOI: 10.1038/s41598-017-13928-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 10/04/2017] [Indexed: 12/30/2022] Open
Abstract
Magnetic nanoparticles (MNP) are intensively investigated for applications in nanomedicine, catalysis and biotechnology, where their interaction with peptides and proteins plays an important role. However, the characterisation of the interaction of individual amino acids with MNP remains challenging. Here, we classify the affinity of 20 amino acid homo-hexamers to unmodified iron oxide nanoparticles using peptide arrays in a variety of conditions as a basis to identify and rationally design selectively binding peptides. The choice of buffer system is shown to strongly influence the availability of peptide binding sites on the MNP surface. We find that under certain buffer conditions peptides of different charges can bind the MNP and that the relative strength of the interactions can be modulated by changing the buffer. We further present a model for the competition between the buffer and the MNP's electrostatically binding to the adsorption sites. Thereby, we demonstrate that the charge distribution on the surface can be used to correlate the binding of positively and negatively charged peptides to the MNP. This analysis enables us to engineer the binding of MNP on peptides and contribute to better understand the bio-nano interactions, a step towards the design of affinity tags for advanced biomaterials.
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Affiliation(s)
- Silvia A Blank-Shim
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching b. München, Germany
| | - Sebastian P Schwaminger
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching b. München, Germany
| | - Monika Borkowska-Panek
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Priya Anand
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Peyman Yamin
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Paula Fraga-García
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching b. München, Germany
| | - Karin Fink
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany
| | - Wolfgang Wenzel
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344, Eggenstein-Leopoldshafen, Germany.
| | - Sonja Berensmeier
- Bioseparation Engineering Group, Department of Mechanical Engineering, Technical University of Munich, 85748, Garching b. München, Germany.
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Schwaminger SP, Fraga-García P, Selbach F, Hein FG, Fuß EC, Surya R, Roth HC, Blank-Shim SA, Wagner FE, Heissler S, Berensmeier S. Bio-nano interactions: cellulase on iron oxide nanoparticle surfaces. ADSORPTION 2016. [DOI: 10.1007/s10450-016-9849-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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