1
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Lo CH, Zeng J. Application of polymersomes in membrane protein study and drug discovery: Progress, strategies, and perspectives. Bioeng Transl Med 2022; 8:e10350. [PMID: 36684106 PMCID: PMC9842050 DOI: 10.1002/btm2.10350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 05/08/2022] [Accepted: 05/10/2022] [Indexed: 01/25/2023] Open
Abstract
Membrane proteins (MPs) play key roles in cellular signaling pathways and are responsible for intercellular and intracellular interactions. Dysfunctional MPs are directly related to the pathogenesis of various diseases, and they have been exploited as one of the most sought-after targets in the pharmaceutical industry. However, working with MPs is difficult given that their amphiphilic nature requires protection from biological membrane or membrane mimetics. Polymersomes are bilayered nano-vesicles made of self-assembled block copolymers that have been widely used as cell membrane mimetics for MP reconstitution and in engineering of artificial cells. This review highlights the prevailing trend in the application of polymersomes in MP study and drug discovery. We begin with a review on the techniques for synthesis and characterization of polymersomes as well as methods of MP insertion to form proteopolymersomes. Next, we review the structural and functional analysis of the different types of MPs reconstituted in polymersomes, including membrane transport proteins, MP complexes, and membrane receptors. We then summarize the factors affecting reconstitution efficiency and the quality of reconstituted MPs for structural and functional studies. Additionally, we discuss the potential in using proteopolymersomes as platforms for high-throughput screening (HTS) in drug discovery to identify modulators of MPs. We conclude by providing future perspectives and recommendations on advancing the study of MPs and drug development using proteopolymersomes.
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Affiliation(s)
- Chih Hung Lo
- Lee Kong Chian School of MedicineNanyang Technological UniversitySingaporeSingapore,Department of Neurology, Brigham and Women's Hospital, Harvard Medical SchoolBostonMassachusettsUSA
| | - Jialiu Zeng
- Lee Kong Chian School of MedicineNanyang Technological UniversitySingaporeSingapore,Department of Biomedical EngineeringBoston UniversityBostonMassachusettsUSA,Department of ChemistryBoston UniversityBostonMassachusettsUSA
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2
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Goodband R, Bain CD, Staykova M. Comparative Study of Lipid- and Polymer-Supported Membranes Obtained by Vesicle Fusion. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:5674-5681. [PMID: 35471971 PMCID: PMC9097520 DOI: 10.1021/acs.langmuir.2c00266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 04/12/2022] [Indexed: 06/14/2023]
Abstract
We compare the fusion of giant lipid and block-copolymer vesicles on glass and poly(dimethylsiloxane) substrates. Both types of vesicles are similar in their ability to fuse to hydrophilic substrates and form patches with distinct heart or circular shapes. We use epifluorescence/confocal microscopy and atomic force microscopy on membrane patches to (i) characterize bilayer fluidity and patch-edge stability and (ii) follow the intermediate stages in the formation of continuous supported bilayers. Polymer membranes show much lower membrane fluidity and, unlike lipids, an inability of adjacent patches to fuse spontaneously into continuous membranes. We ascribe this effect to hydration repulsion forces acting between the patch edges, which can be diminished by increasing the sample temperature. We show that large areas of supported polymer membranes can be created by fusing giant vesicles on glass or poly(dimethylsiloxane) substrates and annealing their edges.
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Affiliation(s)
| | - Colin D. Bain
- Department
of Chemistry, Durham University, Durham DH1 3LE, U.K.
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3
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Certain, but Not All, Tetraether Lipids from the Thermoacidophilic Archaeon Sulfolobus acidocaldarius Can Form Black Lipid Membranes with Remarkable Stability and Exhibiting Mthk Channel Activity with Unusually High Ca 2+ Sensitivity. Int J Mol Sci 2021; 22:ijms222312941. [PMID: 34884746 PMCID: PMC8657495 DOI: 10.3390/ijms222312941] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2021] [Revised: 11/25/2021] [Accepted: 11/27/2021] [Indexed: 11/19/2022] Open
Abstract
Bipolar tetraether lipids (BTL) have been long thought to play a critical role in allowing thermoacidophiles to thrive under extreme conditions. In the present study, we demonstrated that not all BTLs from the thermoacidophilic archaeon Sulfolobus acidocaldarius exhibit the same membrane behaviors. We found that free-standing planar membranes (i.e., black lipid membranes, BLM) made of the polar lipid fraction E (PLFE) isolated from S. acidocaldarius formed over a pinhole on a cellulose acetate partition in a dual-chamber Teflon device exhibited remarkable stability showing a virtually constant capacitance (~28 pF) for at least 11 days. PLFE contains exclusively tetraethers. The dominating hydrophobic core of PLFE lipids is glycerol dialky calditol tetraether (GDNT, ~90%), whereas glycerol dialkyl glycerol tetraether (GDGT) is a minor component (~10%). In sharp contrast, BLM made of BTL extracted from microvesicles (Sa-MVs) released from the same cells exhibited a capacitance between 36 and 39 pF lasting for only 8 h before membrane dielectric breakdown. Lipids in Sa-MVs are also exclusively tetraethers; however, the dominating lipid species in Sa-MVs is GDGT (>99%), not GDNT. The remarkable stability of BLMPLFE can be attributed to strong PLFE–PLFE and PLFE–substrate interactions. In addition, we compare voltage-dependent channel activity of calcium-gated potassium channels (MthK) in BLMPLFE to values recorded in BLMSa-MV. MthK is an ion channel isolated from a methanogenic that has been extensively characterized in diester lipid membranes and has been used as a model for calcium-gated potassium channels. We found that MthK can insert into BLMPLFE and exhibit channel activity, but not in BLMSa-MV. Additionally, the opening/closing of the MthK in BLMPLFE is detectable at calcium concentrations as low as 0.1 mM; conversely, in diester lipid membranes at such a low calcium concentration, no MthK channel activity is detectable. The differential effect of membrane stability and MthK channel activity between BLMPLFE and BLMSa-MV may be attributed to their lipid structural differences and thus their abilities to interact with the substrate and membrane protein. Since Sa-MVs that bud off from the plasma membrane are exclusively tetraether lipids but do not contain the main tetraether lipid component GDNT of the plasma membrane, domain segregation must occur in S. acidocaldarius. The implication of this study is that lipid domain formation is existent and functionally essential in all kinds of cells, but domain formation may be even more prevalent and pronounced in hyperthermophiles, as strong domain formation with distinct membrane behaviors is necessary to counteract randomization due to high growth temperatures while BTL in general make archaea cell membranes stable in high temperature and low pH environments whereas different BTL domains play different functional roles.
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4
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Puiggalí-Jou A, Molina BG, Lopes-Rodrigues M, Michaux C, Perpète EA, Zanuy D, Alemán C. Self-standing, conducting and capacitive biomimetic hybrid nanomembranes for selective molecular ion separation. Phys Chem Chem Phys 2021; 23:16157-16164. [PMID: 34297025 DOI: 10.1039/d1cp01840j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hybrid free-standing biomimetic materials are developed by integrating the VDAC36 β-barrel protein into robust and flexible three-layered polymer nanomembranes. The first and third layers are prepared by spin-coating a mixture of poly(lactic acid) (PLA) and poly(vinyl alcohol) (PVA). PVA nanofeatures are transformed into controlled nanoperforations by solvent-etching. The two nanoperforated PLA layers are separated by an electroactive layer, which is successfully electropolymerized by introducing a conducting sacrificial substrate under the first PLA nanosheet. Finally, the nanomaterial is consolidated by immobilizing the VDAC36 protein, active as an ion channel, into the nanoperforations of the upper layer. The integration of the protein causes a significant reduction of the material resistance, which decreases from 21.9 to 3.9 kΩ cm2. Electrochemical impedance spectroscopy studies using inorganic ions and molecular metabolites (i.e.l-lysine and ATP) not only reveal that the hybrid films behave as electrochemical supercapacitors but also indicate the most appropriate conditions to obtain selective responses against molecular ions as a function of their charge. The combination of polymers and proteins is promising for the development of new devices for engineering, biotechnological and biomedical applications.
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Affiliation(s)
- Anna Puiggalí-Jou
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany 10-14, Edif. I2, 08019, Barcelona, Spain.
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5
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Fennouri A, List J, Ducrey J, Dupasquier J, Sukyte V, Mayer SF, Vargas RD, Pascual Fernandez L, Bertani F, Rodriguez Gonzalo S, Yang J, Mayer M. Tuning the Diameter, Stability, and Membrane Affinity of Peptide Pores by DNA-Programmed Self-Assembly. ACS NANO 2021; 15:11263-11275. [PMID: 34128638 DOI: 10.1021/acsnano.0c10311] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Protein pores recently enabled a breakthrough in bioanalytics by making it possible to sequence individual DNA and RNA strands during their translocation through the lumen of the pore. Despite this success and the overall promise of nanopore-based single-molecule analytics, protein pores have not yet reached their full potential for the analysis and characterization of globular biomolecules such as natively folded proteins. One reason is that the diameters of available protein pores are too small for accommodating the translocation of most folded globular proteins through their lumen. The work presented here provides a step toward overcoming this limitation by programmed self-assembly of α-helical pore-forming peptides with covalently attached single-stranded DNA (ssDNA). Specifically, hybridization of the peptide ceratotoxin A (CtxA) with N-terminally attached ssDNA to a complementary DNA template strand with 4, 8, or 12 hybridization sites made it possible to trigger the assembly of pores with various diameters ranging from approximately 0.5 to 4 nm. Hybridization of additional DNA strands to these assemblies achieved extended functionality in a modular fashion without the need for modifying the amino acid sequence of the peptides. For instance, functionalization of these semisynthetic biological nanopores with DNA-cholesterol anchors increased their affinity to lipid membranes compared to pores formed by native CtxA, while charged transmembrane segments prolonged their open-state lifetime. Assembly of these hybrid DNA-peptides by a template increased their cytotoxic activity and made it possible to kill cancer cells at 20-fold lower total peptide concentrations than nontemplated CtxA.
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Affiliation(s)
- Aziz Fennouri
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Jonathan List
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Julie Ducrey
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Jessica Dupasquier
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Viktorija Sukyte
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Simon F Mayer
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Reyner D Vargas
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Laura Pascual Fernandez
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Frederick Bertani
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Sandra Rodriguez Gonzalo
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
| | - Jerry Yang
- Department of Chemistry and Biochemistry, University of California, San Diego, California 92093, United States
| | - Michael Mayer
- Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, Switzerland
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6
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Sabirovas T, Valiūnienė A, Valincius G. Hybrid bilayer membranes on metallurgical polished aluminum. Sci Rep 2021; 11:9648. [PMID: 33958658 PMCID: PMC8102548 DOI: 10.1038/s41598-021-89150-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 04/15/2021] [Indexed: 11/09/2022] Open
Abstract
In this work we describe the functionalization of metallurgically polished aluminum surfaces yielding biomimetic electrodes suitable for probing protein/phospholipid interactions. The functionalization involves two simple steps: silanization of the aluminum and subsequent fusion of multilamellar vesicles which leads to the formation of a hybrid bilayer lipid membrane (hBLM). The vesicle fusion was followed in real-time by fast Fourier transform electrochemical impedance spectroscopy (FFT EIS). The impedance-derived complex capacitance of the hBLMs was approximately 0.61 µF cm−2, a value typical for intact phospholipid bilayers. We found that the hBLMs can be readily disrupted if exposed to > 400 nM solutions of the pore-forming peptide melittin. However, the presence of cholesterol at 40% (mol) in hBLMs exhibited an inhibitory effect on the membrane-damaging capacity of the peptide. The melittin-membrane interaction was concentration dependent decreasing with concentration. The hBLMs on Al surface can be regenerated multiple times, retaining their dielectric and functional properties essentially intact.
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Affiliation(s)
- Tomas Sabirovas
- Institute of Biochemistry, Life Sciences Center, Vilnius University, Sauletekio ave. 7, 10257, Vilnius, Lithuania
| | - Aušra Valiūnienė
- Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Naugarduko 24, 03225, Vilnius, Lithuania.
| | - Gintaras Valincius
- Institute of Biochemistry, Life Sciences Center, Vilnius University, Sauletekio ave. 7, 10257, Vilnius, Lithuania
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7
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Miller A, Pearce AK, Foster JC, O’Reilly RK. Probing and Tuning the Permeability of Polymersomes. ACS CENTRAL SCIENCE 2021; 7:30-38. [PMID: 33532567 PMCID: PMC7844851 DOI: 10.1021/acscentsci.0c01196] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Indexed: 05/19/2023]
Abstract
Polymersomes are a class of synthetic vesicles composed of a polymer membrane surrounding an aqueous inner cavity. In addition to their overall size, the thickness and composition of polymersome membranes determine the range of potential applications in which they can be employed. While synthetic polymer chemists have made great strides in controlling polymersome membrane parameters, measurement of their permeability to various analytes including gases, ions, organic molecules, and macromolecules remains a significant challenge. In this Outlook, we compare the general methods that have been developed to quantify polymersome membrane permeability, focusing in particular on their capability to accurately measure analyte flux. In addition, we briefly highlight strategies to control membrane permeability. Based on these learnings, we propose a set of criteria for designing future methods of quantifying membrane permeability such that the passage of a variety of molecules into and out of their lumens can be better understood.
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8
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Dos Santos EC, Belluati A, Necula D, Scherrer D, Meyer CE, Wehr RP, Lörtscher E, Palivan CG, Meier W. Combinatorial Strategy for Studying Biochemical Pathways in Double Emulsion Templated Cell-Sized Compartments. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2020; 32:e2004804. [PMID: 33107187 DOI: 10.1002/adma.202004804] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 09/08/2020] [Indexed: 05/16/2023]
Abstract
Cells rely upon producing enzymes at precise rates and stoichiometry for maximizing functionalities. The reasons for this optimal control are unknown, primarily because of the interconnectivity of the enzymatic cascade effects within multi-step pathways. Here, an elegant strategy for studying such behavior, by controlling segregation/combination of enzymes/metabolites in synthetic cell-sized compartments, while preserving vital cellular elements is presented. Therefore, compartments shaped into polymer GUVs are developed, producing via high-precision double-emulsion microfluidics that enable: i) tight control over the absolute and relative enzymatic contents inside the GUVs, reaching nearly 100% encapsulation and co-encapsulation efficiencies, and ii) functional reconstitution of biopores and membrane proteins in the GUVs polymeric membrane, thus supporting in situ reactions. GUVs equipped with biopores/membrane proteins and loaded with one or more enzymes are arranged in a variety of combinations that allow the study of a three-step cascade in multiple topologies. Due to the spatiotemporal control provided, optimum conditions for decreasing the accumulation of inhibitors are unveiled, and benefited from reactive intermediates to maximize the overall cascade efficiency in compartments. The non-system-specific feature of the novel strategy makes this system an ideal candidate for the development of new synthetic routes as well as for screening natural and more complex pathways.
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Affiliation(s)
- Elena C Dos Santos
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
| | - Andrea Belluati
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
| | - Danut Necula
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
| | - Dominik Scherrer
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
- IBM Research Europe, Saeumerstrasse 4, 8803, Rueschlikon, Switzerland
| | - Claire E Meyer
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
| | - Riccardo P Wehr
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
| | - Emanuel Lörtscher
- IBM Research Europe, Saeumerstrasse 4, 8803, Rueschlikon, Switzerland
| | - Cornelia G Palivan
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4002, Basel, Switzerland
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9
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Iqbal S, Blenner M, Alexander-Bryant A, Larsen J. Polymersomes for Therapeutic Delivery of Protein and Nucleic Acid Macromolecules: From Design to Therapeutic Applications. Biomacromolecules 2020; 21:1327-1350. [DOI: 10.1021/acs.biomac.9b01754] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Shoaib Iqbal
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Mark Blenner
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Angela Alexander-Bryant
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
| | - Jessica Larsen
- Department of Chemical and Biomolecular Engineering, Clemson University, Clemson, South Carolina 29634, United States
- Department of Bioengineering, Clemson University, Clemson, South Carolina 29634, United States
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10
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Belluati A, Mikhalevich V, Yorulmaz Avsar S, Daubian D, Craciun I, Chami M, Meier WP, Palivan CG. How Do the Properties of Amphiphilic Polymer Membranes Influence the Functional Insertion of Peptide Pores? Biomacromolecules 2019; 21:701-715. [DOI: 10.1021/acs.biomac.9b01416] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Andrea Belluati
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
| | - Viktoria Mikhalevich
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
| | - Saziye Yorulmaz Avsar
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
| | - Davy Daubian
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
| | - Ioana Craciun
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
| | - Mohamed Chami
- BioEM Lab, Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Wolfgang P. Meier
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
| | - Cornelia G. Palivan
- Department of Chemistry, University of Basel, Mattenstrasse 24a, BPR 1096, 4058 Basel, Switzerland
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11
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Chimisso V, Maffeis V, Hürlimann D, Palivan CG, Meier W. Self-Assembled Polymeric Membranes and Nanoassemblies on Surfaces: Preparation, Characterization, and Current Applications. Macromol Biosci 2019; 20:e1900257. [PMID: 31549783 DOI: 10.1002/mabi.201900257] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 08/30/2019] [Indexed: 01/11/2023]
Abstract
Biomembranes play a crucial role in a multitude of biological processes, where high selectivity and efficiency are key points in the reaction course. The outstanding performance of biological membranes is based on the coupling between the membrane and biomolecules, such as membrane proteins. Polymer-based membranes and assemblies represent a great alternative to lipid ones, as their presence not only dramatically increases the mechanical stability of such systems, but also opens the scope to a broad range of chemical functionalities, which can be fine-tuned to selectively combine with a specific biomolecule. Tethering the membranes or nanoassemblies on a solid support opens the way to a class of functional surfaces finding application as sensors, biocomputing systems, molecular recognition, and filtration membranes. Herein, the design, physical assembly, and biomolecule attachment/insertion on/within solid-supported polymeric membranes and nanoassemblies are presented in detail with relevant examples. Furthermore, the models and applications for these materials are highlighted with the recent advances in each field.
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Affiliation(s)
- Vittoria Chimisso
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4056, Basel, Switzerland
| | - Viviana Maffeis
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4056, Basel, Switzerland
| | - Dimitri Hürlimann
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4056, Basel, Switzerland
| | - Cornelia G Palivan
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4056, Basel, Switzerland
| | - Wolfgang Meier
- Department of Chemistry, University of Basel, Mattenstrasse 24a, 4056, Basel, Switzerland
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12
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Mirzaei Garakani T, Liu Z, Glebe U, Gehrmann J, Lazar J, Mertens MAS, Möller M, Hamzelui N, Zhu L, Schnakenberg U, Böker A, Schwaneberg U. In Situ Monitoring of Membrane Protein Insertion into Block Copolymer Vesicle Membranes and Their Spreading via Potential-Assisted Approach. ACS APPLIED MATERIALS & INTERFACES 2019; 11:29276-29289. [PMID: 31329408 DOI: 10.1021/acsami.9b09302] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Synthosomes are polymer vesicles with transmembrane proteins incorporated into block copolymer membranes. They have been used for selective transport in or out of the vesicles as well as catalysis inside the compartments. However, both the insertion process of the membrane protein, forming nanopores, and the spreading of the vesicles on planar substrates to form solid-supported biomimetic membranes have been rarely studied yet. Herein, we address these two points and, first, shed light on the real-time monitoring of protein insertion via isothermal titration calorimetry. Second, the spreading process on different solid supports, namely, SiO2, glass, and gold, via different techniques like spin- and dip-coating as well as a completely new approach of potential-assisted spreading on gold surfaces was studied. While inhomogeneous layers occur via traditional methods, our proposed potential-assisted strategy to induce adsorption of positively charged vesicles by applying negative potential on the electrode leads to remarkable vesicle spreading and their further fusion to form more homogeneous planar copolymer films on gold. The polymer vesicles in our study are formed from amphiphilic copolymers poly(2-methyl oxazoline)-block-poly(dimethylsiloxane)-block-poly(2-methyl oxazoline) (PMOXA-b-PDMS-b-PMOXA). Engineered variants of the transmembrane protein ferric hydroxamate uptake protein component A (FhuA), one of the largest β-barrel channel proteins, are used as model nanopores. The incorporation of FhuA Δ1-160 is shown to facilitate the vesicle spreading process further. Moreover, high accessibility of cysteine inside the channel was proven by linkage of a fluorescent dye inside the engineered variant FhuA ΔCVFtev and hence preserved functionality of the channels after spreading. The porosity and functionality of the spread synthosomes on the gold plates have been examined by studying the passive ion transport response in the presence of Li+ and ClO4- ions and electrochemical impedance spectroscopy analysis. Our approach to form solid-supported biomimetic membranes via the potential-assisted strategy could be important for the development of new (bio-) sensors and membranes.
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Affiliation(s)
- Tayebeh Mirzaei Garakani
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
- DWI - Leibniz Institute for Interactive Materials , Forckenbeckstraße 50 , D-52074 , Aachen , Germany
| | - Zhanzhi Liu
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
| | - Ulrich Glebe
- Fraunhofer Institute for Applied Polymer Research IAP , Geiselbergstraße 69 , 14476 Potsdam -Golm, Germany
- Chair of Polymer Materials and Polymer Technologies, Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Str. 24-25 , 14476 Potsdam -Golm, Germany
| | - Julia Gehrmann
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
| | - Jaroslav Lazar
- Institute of Materials in Electrical Engineering 1 , RWTH Aachen University , Sommerfeldstraße 24 , 52074 Aachen , Germany
| | | | - Mieke Möller
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
| | - Niloofar Hamzelui
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
| | - Leilei Zhu
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
| | - Uwe Schnakenberg
- Institute of Materials in Electrical Engineering 1 , RWTH Aachen University , Sommerfeldstraße 24 , 52074 Aachen , Germany
| | - Alexander Böker
- Fraunhofer Institute for Applied Polymer Research IAP , Geiselbergstraße 69 , 14476 Potsdam -Golm, Germany
- Chair of Polymer Materials and Polymer Technologies, Institute of Chemistry , University of Potsdam , Karl-Liebknecht-Str. 24-25 , 14476 Potsdam -Golm, Germany
| | - Ulrich Schwaneberg
- Institute of Biotechnology , RWTH Aachen University , Worringer Weg 3 , D-52074 Aachen , Germany
- DWI - Leibniz Institute for Interactive Materials , Forckenbeckstraße 50 , D-52074 , Aachen , Germany
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13
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Anand D, Dhoke GV, Gehrmann J, Garakani TM, Davari MD, Bocola M, Zhu L, Schwaneberg U. Chiral separation of d/l-arginine with whole cells through an engineered FhuA nanochannel. Chem Commun (Camb) 2019; 55:5431-5434. [PMID: 30916680 DOI: 10.1039/c9cc00154a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Downstream processing to obtain enantiopure compounds from a racemic mixture relies mainly on crystallization. Natural transporters can specifically translocate enantiomers through membranes. Here a β-barrel transmembrane protein FhuA is re-engineered into a chiral channel protein (FhuAF4) to resolve racemic mixtures of d-/l-arginine. The engineered FhuAF4 variant exhibits an enantioselectivity (E-value) of 1.92 and an enantiomeric excess percentage (ee%) of 23.91 at 52.39% conversion. OmniChange mutant libraries at the computationally identified "filter-regions" likely help to identify FhuA variants for enantiomeric separation of other compounds.
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Affiliation(s)
- Deepak Anand
- Institute of Biotechnology, RWTH Aachen University Worringer Weg 3, D-52074 Aachen, Germany.
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Puiggalí-Jou A, Del Valle LJ, Alemán C. Biomimetic hybrid membranes: incorporation of transport proteins/peptides into polymer supports. SOFT MATTER 2019; 15:2722-2736. [PMID: 30869096 DOI: 10.1039/c8sm02513d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Molecular sensing, water purification and desalination, drug delivery, and DNA sequencing are some striking applications of biomimetic hybrid membranes. These devices take advantage of biomolecules, which have gained excellence in their specificity and efficiency during billions of years, and of artificial materials that load the purified biological molecules and provide technological properties, such as robustness, scalability, and suitable nanofeatures to confine the biomolecules. Recent methodological advances allow more precise control of polymer membranes that support the biomacromolecules, and are expected to improve the design of the next generation of membranes as well as their applicability. In the first section of this review we explain the biological relevance of membranes, membrane proteins, and the classification used for the latter. After this, we critically analyse the different approaches employed for the production of highly selective hybrid membranes, focusing on novel materials made of self-assembled block copolymers and nanostructured polymers. Finally, a summary of the advantages and disadvantages of the different methodologies is presented and the main characteristics of biomimetic hybrid membranes are highlighted.
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Affiliation(s)
- Anna Puiggalí-Jou
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain. and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019, Barcelona, Spain
| | - Luis J Del Valle
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain. and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019, Barcelona, Spain
| | - Carlos Alemán
- Departament d'Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019, Barcelona, Spain. and Barcelona Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019, Barcelona, Spain
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15
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Polymer membranes as templates for bio-applications ranging from artificial cells to active surfaces. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2018.12.047] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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16
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Mumtaz Virk M, Hofmann B, Reimhult E. Formation and Characteristics of Lipid-Blended Block Copolymer Bilayers on a Solid Support Investigated by Quartz Crystal Microbalance and Atomic Force Microscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:739-749. [PMID: 30580525 DOI: 10.1021/acs.langmuir.8b03597] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Liposomes grafted with polymer have long been used in drug delivery applications, and block copolymersomes have emerged as attractive and more robust alternatives for both drug delivery and artificial organelle applications. Hybrid membranes that could combine the respective advantages of fluid lipid and robust polymer bilayers are an attractive and enticing alternative. The properties of membranes in amphiphile vesicles are challenging to study and many applications benefit from surface-based access to the membrane. We therefore explore the self-assembly and mechanical properties of supported hybrid bilayers (SHBs) composed of polybutadiene- block-poly(ethylene oxide) block copolymers and zwitterionic phosphatidylcholine lipids on SiO2 supports. Quartz crystal microbalance with dissipation monitoring (QCM-D) measurements show that formation of SHB on SiO2 by vesicle fusion depends on the mass fractions of lipids and block copolymers. Atomic force microscopy was used to study the microscopic mixing of lipids in the SHB to reveal that lipid-phase separation is not observed in SHBs. Force spectroscopy was performed to extract information about thickness and mechanical properties of the hybrid membranes. SHBs are shown to combine the properties of lipid membranes and polymer brushes, and the tip force required to rupture the membrane decreases and the bilayer thickness increases as the block copolymer fraction is increased.
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Affiliation(s)
- Mudassar Mumtaz Virk
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Benedikt Hofmann
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences Vienna , Muthgasse 11 , 1190 Vienna , Austria
| | - Erik Reimhult
- Institute for Biologically Inspired Materials, Department of Nanobiotechnology , University of Natural Resources and Life Sciences Vienna , Muthgasse 11 , 1190 Vienna , Austria
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Yorulmaz Avsar S, Kyropoulou M, Di Leone S, Schoenenberger CA, Meier WP, Palivan CG. Biomolecules Turn Self-Assembling Amphiphilic Block Co-polymer Platforms Into Biomimetic Interfaces. Front Chem 2019; 6:645. [PMID: 30671429 PMCID: PMC6331732 DOI: 10.3389/fchem.2018.00645] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 12/11/2018] [Indexed: 12/29/2022] Open
Abstract
Biological membranes constitute an interface between cells and their surroundings and form distinct compartments within the cell. They also host a variety of biomolecules that carry out vital functions including selective transport, signal transduction and cell-cell communication. Due to the vast complexity and versatility of the different membranes, there is a critical need for simplified and specific model membrane platforms to explore the behaviors of individual biomolecules while preserving their intrinsic function. Information obtained from model membrane platforms should make invaluable contributions to current and emerging technologies in biotechnology, nanotechnology and medicine. Amphiphilic block co-polymers are ideal building blocks to create model membrane platforms with enhanced stability and robustness. They form various supramolecular assemblies, ranging from three-dimensional structures (e.g., micelles, nanoparticles, or vesicles) in aqueous solution to planar polymer membranes on solid supports (e.g., polymer cushioned/tethered membranes,) and membrane-like polymer brushes. Furthermore, polymer micelles and polymersomes can also be immobilized on solid supports to take advantage of a wide range of surface sensitive analytical tools. In this review article, we focus on self-assembled amphiphilic block copolymer platforms that are hosting biomolecules. We present different strategies for harnessing polymer platforms with biomolecules either by integrating proteins or peptides into assemblies or by attaching proteins or DNA to their surface. We will discuss how to obtain synthetic structures on solid supports and their characterization using different surface sensitive analytical tools. Finally, we highlight present and future perspectives of polymer micelles and polymersomes for biomedical applications and those of solid-supported polymer membranes for biosensing.
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Puiggalí-Jou A, Pawlowski J, del Valle LJ, Michaux C, Perpète EA, Sek S, Alemán C. Properties of Omp2a-Based Supported Lipid Bilayers: Comparison with Polymeric Bioinspired Membranes. ACS OMEGA 2018; 3:9003-9019. [PMID: 31459033 PMCID: PMC6645002 DOI: 10.1021/acsomega.8b00913] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 07/19/2018] [Indexed: 05/31/2023]
Abstract
Omp2a β-barrel outer membrane protein has been reconstituted into supported lipid bilayers (SLBs) to compare the nanomechanical properties (elastic modulus, adhesion forces, and deformation) and functionality of the resulting bioinspired system with those of Omp2a-based polymeric nanomembranes (NMs). Protein reconstitution into lipid bilayers has been performed using different strategies, the most successful one consisting of a detergent-mediated process into preformed liposomes. The elastic modulus obtained for the lipid bilayer and Omp2a are ∼19 and 10.5 ± 1.7 MPa, respectively. Accordingly, the protein is softer than the lipid bilayer, whereas the latter exhibits less mechanical strength than polymeric NMs. Besides, the function of Omp2a in the SLB is similar to that observed for Omp2a-based polymeric NMs. Results open the door to hybrid bioinspired substrates based on the integration of Omp2a-proteoliposomes and nanoperforated polymeric freestanding NMs.
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Affiliation(s)
- Anna Puiggalí-Jou
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019 Barcelona, Spain
| | - Jan Pawlowski
- Biological
and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Zwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Luis J. del Valle
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019 Barcelona, Spain
| | - Catherine Michaux
- Laboratoire
de Chimie Physique des Biomolécules, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Eric A. Perpète
- Laboratoire
de Chimie Physique des Biomolécules, University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Slawomir Sek
- Biological
and Chemical Research Centre, Faculty of Chemistry, University of Warsaw, Zwirki i Wigury 101, 02-089 Warsaw, Poland
| | - Carlos Alemán
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, C/Eduard Maristany, 10-14, Ed. C, 08019 Barcelona, Spain
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Lopes-Rodrigues M, Puiggalí-Jou A, Martí-Balleste D, del Valle LJ, Michaux C, Perpète EA, Alemán C. Thermomechanical Response of a Representative Porin for Biomimetics. ACS OMEGA 2018; 3:7856-7867. [PMID: 31458928 PMCID: PMC6644815 DOI: 10.1021/acsomega.8b00463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/02/2018] [Indexed: 06/09/2023]
Abstract
The thermomechanical response of Omp2a, a representative porin used for the fabrication of smart biomimetic nanomembranes, has been characterized using microcantilever technology and compared with standard proteins. For this purpose, thermally induced transitions involving the conversion of stable trimers to bigger aggregates, local reorganizations based on the strengthening or weakening of intermolecular interactions, and protein denaturation have been detected by the microcantilever resonance frequency and deflection as a function of the temperature. Measurements have been carried out on arrays of 8-microcantilevers functionalized with proteins (Omp2a, lysozyme and bovine serum albumin). To interpret the measured nanofeatures, the response of proteins to temperature has been also examined using other characterization techniques, including real time wide angle X-ray diffraction. Results not only demonstrate the complex behavior of porins, which exhibit multiple local thermal transitions before undergoing denaturation at temperatures higher than 105 °C, but also suggest a posttreatment to control the orientation of immobilized Omp2a molecules in functionalized biomimetic nanomembranes and, thus, increase their efficacy in ion transport.
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Affiliation(s)
- Maximilien Lopes-Rodrigues
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/ Eduard Maristany, 10-14, Ed.
I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Spain
- Laboratoire
de Chimie Physique des Biomolécules, Unité de Chimie
Physique Théorique et Structurale (UCPTS), University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Anna Puiggalí-Jou
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/ Eduard Maristany, 10-14, Ed.
I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Spain
| | - Didac Martí-Balleste
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/ Eduard Maristany, 10-14, Ed.
I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Spain
| | - Luis J. del Valle
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/ Eduard Maristany, 10-14, Ed.
I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Spain
| | - Catherine Michaux
- Laboratoire
de Chimie Physique des Biomolécules, Unité de Chimie
Physique Théorique et Structurale (UCPTS), University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Eric A. Perpète
- Laboratoire
de Chimie Physique des Biomolécules, Unité de Chimie
Physique Théorique et Structurale (UCPTS), University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Carlos Alemán
- Departament
d’Enginyeria Química, EEBE, Universitat Politècnica de Catalunya, C/ Eduard Maristany, 10-14, Ed.
I2, 08019 Barcelona, Spain
- Barcelona
Research Center for Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Eduard Maristany, 10-14, 08019 Barcelona, Spain
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20
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Draghici C, Mikhalevich V, Gunkel-Grabole G, Kowal J, Meier W, Palivan CG. Biomimetic Planar Polymer Membranes Decorated with Enzymes as Functional Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9015-9024. [PMID: 29972642 DOI: 10.1021/acs.langmuir.8b00541] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Functional surfaces were generated by a combination of enzymes with polymer membranes composed of an amphiphilic, asymmetric block copolymer poly(ethyleneglycol)- block-poly(γ-methyl-ε-caprolactone)- block-poly[(2-dimethylamino)ethylmethacrylate]. First, polymer films formed at the air-water interface were transferred in different sequences onto silica solid support using the Langmuir-Blodgett technique, generating homogeneous monolayers and bilayers. A detailed characterization of these films provided insight into their properties (film thickness, wettability, topography, and roughness). On the basis of these findings, the most promising membranes were selected for enzyme attachment. Functional surfaces were then generated by the adsorption of two model enzymes that can convert phenol and its derivatives (laccase and tyrosinase), well known as high-risk pollutants of drinking and natural water. Both enzymes preserved their activity upon immobilization with respect to their substrates. Depending on the properties of the polymer films, different degrees of enzymatic activity were observed: bilayers provided the best conditions in terms of both overall stability and enzymatic activity. The interaction between amphiphilic triblock copolymer films and enzymes is exploited to engineer "active surfaces" with specific functionalities and high efficacy resulting from the intrinsic activity of the biomolecules that is preserved by an appropriate synthetic environment.
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Affiliation(s)
- Camelia Draghici
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
- Product Design, Mechatronics and Environment Department , Transilvania University of Brasov , 29 Eroilor Blv , 500036 Brasov , Romania
| | - Viktoria Mikhalevich
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Gesine Gunkel-Grabole
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Justyna Kowal
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Wolfgang Meier
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
| | - Cornelia G Palivan
- Chemistry Department , University of Basel , Mattenstrasse 24a , BPR 1096, 4002 Basel , Switzerland
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21
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Ren X, Kumbur EC, Zhou JG, Noh M, Chong PLG. Stability of free-standing tetraether planar membranes in microchips. J Memb Sci 2017. [DOI: 10.1016/j.memsci.2017.06.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Mikhalevich V, Craciun I, Kyropoulou M, Palivan CG, Meier W. Amphiphilic Peptide Self-Assembly: Expansion to Hybrid Materials. Biomacromolecules 2017; 18:3471-3480. [DOI: 10.1021/acs.biomac.7b00764] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Viktoria Mikhalevich
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Ioana Craciun
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Myrto Kyropoulou
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Cornelia G. Palivan
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Wolfgang Meier
- University of Basel, Department of Chemistry, Klingelbergstrasse 80, 4056 Basel, Switzerland
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23
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Hu Z, Ho JC, Nallani M. Synthetic (polymer) biology (membrane): functionalization of polymer scaffolds for membrane proteins. Curr Opin Biotechnol 2017; 46:51-56. [DOI: 10.1016/j.copbio.2016.10.012] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2016] [Accepted: 10/24/2016] [Indexed: 12/13/2022]
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Szałata K, Gumi T. BioArtificial polymers. PHYSICAL SCIENCES REVIEWS 2017. [DOI: 10.1515/psr-2017-0019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractNowadays, the polymer science has impact in practically all life areas. Countless benefits coming from the usage of materials with high mechanical and chemical resistance, variety of functionalities and potentiality of modification drive to the development of new application fields. Novel approaches of combining these synthetic substances with biomolecules lead to obtain multifunctional hybrid conjugates which merge the bioactivity of natural component with outstanding properties of artificial polymer. Over the decades, an immense progress in bioartificial composites domain allowed to reach a high level of knowledge in terms of natural-like systems engineering, leading to diverse strategies of biomolecule immobilization. Together with different available options, including covalent and noncovalent attachment, come various challenges, related mainly with maintaining the biological activity of fixed molecules. Even though the amount of applications that achieve commercial status is still not substantial, and is expanding continuously in the disciplines like “smart materials,” biosensors, delivery systems, nanoreactors and many others. A huge number of remarkable developments reported in the literature present a potential of bioartificial conjugates as a fabrics with highly controllable structure and multiple functionalities, serving as a powerful nanotechnological tool. This novel approach brings closer biologists, chemists and engineers, who sharing their effort and complementing the knowledge can revolutionize the field of bioartificial polymer science.
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Fu W, Jiang L, van Geest EP, Lima LMC, Schneider GF. Sensing at the Surface of Graphene Field-Effect Transistors. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2017; 29:1603610. [PMID: 27896865 DOI: 10.1002/adma.201603610] [Citation(s) in RCA: 136] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 08/18/2016] [Indexed: 05/21/2023]
Abstract
Recent research trends now offer new opportunities for developing the next generations of label-free biochemical sensors using graphene and other two-dimensional materials. While the physics of graphene transistors operated in electrolyte is well grounded, important chemical challenges still remain to be addressed, namely the impact of the chemical functionalizations of graphene on the key electrical parameters and the sensing performances. In fact, graphene - at least ideal graphene - is highly chemically inert. The functionalizations and chemical alterations of the graphene surface - both covalently and non-covalently - are crucial steps that define the sensitivity of graphene. The presence, reactivity, adsorption of gas and ions, proteins, DNA, cells and tissues on graphene have been successfully monitored with graphene. This review aims to unify most of the work done so far on biochemical sensing at the surface of a (chemically functionalized) graphene field-effect transistor and the challenges that lie ahead. The authors are convinced that graphene biochemical sensors hold great promise to meet the ever-increasing demand for sensitivity, especially looking at the recent progresses suggesting that the obstacle of Debye screening can be overcome.
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Affiliation(s)
- Wangyang Fu
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Lin Jiang
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Erik P van Geest
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Lia M C Lima
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
| | - Grégory F Schneider
- Leiden University, Faculty of Science, Leiden Institute of Chemistry, Einsteinweg 55, 2333CC, Leiden, The Netherlands
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Garni M, Thamboo S, Schoenenberger CA, Palivan CG. Biopores/membrane proteins in synthetic polymer membranes. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1859:619-638. [PMID: 27984019 DOI: 10.1016/j.bbamem.2016.10.015] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Revised: 10/20/2016] [Accepted: 10/25/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Mimicking cell membranes by simple models based on the reconstitution of membrane proteins in lipid bilayers represents a straightforward approach to understand biological function of these proteins. This biomimetic strategy has been extended to synthetic membranes that have advantages in terms of chemical and mechanical stability, thus providing more robust hybrid membranes. SCOPE OF THE REVIEW We present here how membrane proteins and biopores have been inserted both in the membrane of nanosized and microsized compartments, and in planar membranes under various conditions. Such bio-hybrid membranes have new properties (as for example, permeability to ions/molecules), and functionality depending on the specificity of the inserted biomolecules. Interestingly, membrane proteins can be functionally inserted in synthetic membranes provided these have appropriate properties to overcome the high hydrophobic mismatch between the size of the biomolecule and the membrane thickness. MAJOR CONCLUSION Functional insertion of membrane proteins and biopores in synthetic membranes of compartments or in planar membranes is possible by an appropriate selection of the amphiphilic copolymers, and conditions of the self-assembly process. These hybrid membranes have new properties and functionality based on the specificity of the biomolecules and the nature of the synthetic membranes. GENERAL SIGNIFICANCE Bio-hybrid membranes represent new solutions for the development of nanoreactors, artificial organelles or active surfaces/membranes that, by further gaining in complexity and functionality, will promote translational applications. This article is part of a Special Issue entitled: Lipid order/lipid defects and lipid-control of protein activity edited by Dirk Schneider.
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Affiliation(s)
- Martina Garni
- Chemistry Department, University of Basel, Klingelbergstrasse 80, Switzerland
| | - Sagana Thamboo
- Chemistry Department, University of Basel, Klingelbergstrasse 80, Switzerland
| | | | - Cornelia G Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, Switzerland.
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27
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Puiggalí-Jou A, Pérez-Madrigal MM, Del Valle LJ, Armelin E, Casas MT, Michaux C, Perpète EA, Estrany F, Alemán C. Confinement of a β-barrel protein in nanoperforated free-standing nanomembranes for ion transport. NANOSCALE 2016; 8:16922-16935. [PMID: 27714137 DOI: 10.1039/c6nr04948f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Bioinspired free-standing nanomembranes (FSNMs) for selective ion transport have been tailored by immobilizing the Omp2a β-barrel membrane protein inside nanoperforations created in flexible poly(lactic acid) (PLA) nanomembranes. Perforated PLA FSNMs have been prepared by spin-coating a 99 : 1 PLA : poly(vinyl alcohol) mixture, and through a phase segregation process nanofeatures with dimensions similar to the entire nanomembrane thickness (∼110 nm) were induced. These nanofeatures have subsequently been transformed into nanoperforations (diameter: ∼51 nm) by selective solvent etching. The protein confined inside the nanopores of PLA FSNMs preserves the β-barrel structure and organizes in ovoid aggregates. The transport properties of Na+, K+, and Ca2+ across non-perforated PLA, nanoperforated PLA, and Omp2a-filled nanoperforated PLA have been monitored by measuring the nanomembrane resistance with electrochemical impedance spectroscopy (EIS). The incorporation of nanoperforations enhances the transport of ions across PLA nanomembranes, whereas the functionality of immobilized Omp2a is essential to exhibit effects similar to those observed in biological nanomembranes. Indeed, Omp2a-filled nanoperforated PLA nanomembranes exhibit stronger affinity towards Na+ and Ca2+ ions than towards K+. In summary, this work provides a novel bioinspired strategy to develop mechanically stable and flexible FSNMs with channels for ion transport, which are precisely located inside artificial nanoperforations, thus holding great potential for applications in biofiltration and biosensing.
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Affiliation(s)
- Anna Puiggalí-Jou
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, Avda. Diagonal 647, Barcelona E-08028, Spain. and Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C', C/Pasqual i Vila s/n, Barcelona E-08028, Spain
| | - Maria M Pérez-Madrigal
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, Avda. Diagonal 647, Barcelona E-08028, Spain. and Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C', C/Pasqual i Vila s/n, Barcelona E-08028, Spain
| | - Luis J Del Valle
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, Avda. Diagonal 647, Barcelona E-08028, Spain. and Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C', C/Pasqual i Vila s/n, Barcelona E-08028, Spain
| | - Elaine Armelin
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, Avda. Diagonal 647, Barcelona E-08028, Spain. and Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C', C/Pasqual i Vila s/n, Barcelona E-08028, Spain
| | - María T Casas
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, Avda. Diagonal 647, Barcelona E-08028, Spain.
| | - Catherine Michaux
- Laboratoire de Chimie Physique des Biomolécules, Unité de Chimie Physique Théorique et Structurale (UCPTS), University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Eric A Perpète
- Laboratoire de Chimie Physique des Biomolécules, Unité de Chimie Physique Théorique et Structurale (UCPTS), University of Namur, Rue de Bruxelles, 61, 5000 Namur, Belgium
| | - Francesc Estrany
- Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C', C/Pasqual i Vila s/n, Barcelona E-08028, Spain and Departament d'Enginyeria Química, Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona, Universitat Politècnica de Catalunya, Comte d'Urgell 187, 08036 Barcelona, Spain
| | - Carlos Alemán
- Departament d'Enginyeria Química, ETSEIB, Universitat Politècnica de Catalunya, Avda. Diagonal 647, Barcelona E-08028, Spain. and Center for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C', C/Pasqual i Vila s/n, Barcelona E-08028, Spain
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28
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Yang YL, Tsao HK, Sheng YJ. Solid-supported polymer bilayers formed by coil-coil block copolymers. SOFT MATTER 2016; 12:6442-6450. [PMID: 27418114 DOI: 10.1039/c6sm00741d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The formation and physical properties of solid-supported polymer bilayers (SPBs) on an adhesive substrate have been explored by dissipative particle dynamics simulations. A SPB is developed by the adsorption of vesicles formed by diblock copolymers in a selective solvent. The adsorbed vesicle can remain intact or become ruptured into a SPB, depending on the interaction between solvophobic blocks and solvent and the interaction between solvophilic blocks and the substrate. The morphological phase diagram of adsorbed vesicles is acquired. The influence of polymer adhesion strength and solvophobicity on the geometrical and mechanical properties of a SPB is systematically studied as well. It is found that vesicular disruption is easily triggered for strong adhesion strength. Moreover, for strong adhesion strength and weak solvophobicity, the fluctuation of membrane height is impeded while the area of fluctuation is enhanced.
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Affiliation(s)
- Yan-Ling Yang
- Department of Chemical Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China.
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29
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Preta G, Jankunec M, Heinrich F, Griffin S, Sheldon IM, Valincius G. Tethered bilayer membranes as a complementary tool for functional and structural studies: The pyolysin case. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:2070-2080. [PMID: 27211243 DOI: 10.1016/j.bbamem.2016.05.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 04/27/2016] [Accepted: 05/17/2016] [Indexed: 10/21/2022]
Abstract
We demonstrate the use of tethered bilayer lipid membranes (tBLMs) as an experimental platform for functional and structural studies of membrane associated proteins by electrochemical techniques. The reconstitution of the cholesterol-dependent cytolysin (CDC) pyolysin (PLO) from Trueperella pyogenes into tBLMs was followed in real-time by electrochemical impedance spectroscopy (EIS). Changes of the EIS parameters of the tBLMs upon exposure to PLO solutions were consistent with the dielectric barrier damage occurring through the formation of water-filled pores in membranes. Parallel experiments involving a mutant version of PLO, which is able to bind to the membranes but does not form oligomer pores, strengthen the reliability of this methodology, since no change in the electrochemical impedance was observed. Complementary atomic force microscopy (AFM) and neutron reflectometry (NR) measurements revealed structural details of the membrane bound PLO, consistent with the structural transformations of the membrane bound toxins found for other cholesterol dependent cytolysins. In this work, using the tBLMs platform we also observed a protective effect of the dynamin inhibitor Dynasore against pyolysin as well as pneumolysin. An effect of Dynasore in tBLMs, which was earlier observed in experiments with live cells, confirms the biological relevance of the tBLMs models, as well as demonstrates the potential of the electrochemical impedance spectroscopy to quantify membrane damage by the pore forming toxins. In conclusion, tBLMs are a reliable and complementary method to explore the activity of CDCs in eukaryotic cells and to develop strategies to limit the toxic effects of CDCs.
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Affiliation(s)
- Giulio Preta
- Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Vilnius University, Vilnius, Lithuania
| | - Marija Jankunec
- Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Vilnius University, Vilnius, Lithuania
| | - Frank Heinrich
- NIST Center for Neutron Research, Gaithersburg, MD 20899, USA
| | - Sholeem Griffin
- Institute of Life Science, Swansea University Medical School, Swansea SA2 8PP, United Kingdom
| | - Iain Martin Sheldon
- Institute of Life Science, Swansea University Medical School, Swansea SA2 8PP, United Kingdom
| | - Gintaras Valincius
- Department of Bioelectrochemistry and Biospectroscopy, Institute of Biochemistry, Vilnius University, Vilnius, Lithuania.
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30
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Palivan CG, Goers R, Najer A, Zhang X, Car A, Meier W. Bioinspired polymer vesicles and membranes for biological and medical applications. Chem Soc Rev 2016; 45:377-411. [DOI: 10.1039/c5cs00569h] [Citation(s) in RCA: 413] [Impact Index Per Article: 51.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Biological membranes play an essential role in living organisms by providing stable and functional compartments, supporting signalling and selective transport. Combining synthetic polymer membranes with biological molecules promises to be an effective strategy to mimic the functions of cell membranes and apply them in artificial systems.
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Affiliation(s)
| | - Roland Goers
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
- Department of Biosystems Science and Engineering
| | - Adrian Najer
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Xiaoyan Zhang
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Anja Car
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
| | - Wolfgang Meier
- Department of Chemistry
- University of Basel
- CH-4056 Basel
- Switzerland
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31
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Duong-Thi MD, Bergström M, Edwards K, Eriksson J, Ohlson S, To Yiu Ying J, Torres J, Agmo Hernández V. Lipodisks integrated with weak affinity chromatography enable fragment screening of integral membrane proteins. Analyst 2016; 141:981-8. [DOI: 10.1039/c5an02105g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Membrane proteins constitute the largest class of drug targets but they present many challenges in drug discovery.
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Affiliation(s)
- Minh-Dao Duong-Thi
- Linnaeus University
- Department of Chemistry and Biomedical Sciences
- SE-39182 Kalmar
- Sweden
| | - Maria Bergström
- Linnaeus University
- Department of Chemistry and Biomedical Sciences
- SE-39182 Kalmar
- Sweden
| | - Katarina Edwards
- Uppsala University
- Department of Chemistry-BMC
- SE-75123 Uppsala
- Sweden
| | - Jonny Eriksson
- Uppsala University
- Department of Chemistry-BMC
- SE-75123 Uppsala
- Sweden
| | - Sten Ohlson
- Nanyang Technological University
- School of Biological Sciences
- Singapore 637551
- Republic of Singapore
| | - Janet To Yiu Ying
- Nanyang Technological University
- School of Biological Sciences
- Singapore 637551
- Republic of Singapore
| | - Jaume Torres
- Nanyang Technological University
- School of Biological Sciences
- Singapore 637551
- Republic of Singapore
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32
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Lagny TJ, Bassereau P. Bioinspired membrane-based systems for a physical approach of cell organization and dynamics: usefulness and limitations. Interface Focus 2015; 5:20150038. [PMID: 26464792 PMCID: PMC4590427 DOI: 10.1098/rsfs.2015.0038] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Being at the periphery of each cell compartment and enclosing the entire cell while interacting with a large part of cell components, cell membranes participate in most of the cell's vital functions. Biologists have worked for a long time on deciphering how membranes are organized, how they contribute to trafficking, motility, cytokinesis, cell-cell communication, information transport, etc., using top-down approaches and always more advanced techniques. In contrast, physicists have developed bottom-up approaches and minimal model membrane systems of growing complexity in order to build up general models that explain how cell membranes work and how they interact with proteins, e.g. the cytoskeleton. We review the different model membrane systems that are currently available, and how they can help deciphering cell functioning, but also list their limitations. Model membrane systems are also used in synthetic biology and can have potential applications beyond basic research. We discuss the possible synergy between the development of complex in vitro membrane systems in a biological context and for technological applications. Questions that could also be discussed are: what can we still do with synthetic systems, where do we stop building up and which are the alternative solutions?
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Affiliation(s)
- Thibaut J Lagny
- Institut Curie, PSL Research University , Laboratory PhysicoChimie Curie , 75248 Paris, Cedex 05 , France ; CNRS , UMR168, 75248 Paris, Cedex 05 , France ; Université Pierre et Marie Curie , 75252 Paris, Cedex 05 , France
| | - Patricia Bassereau
- Institut Curie, PSL Research University , Laboratory PhysicoChimie Curie , 75248 Paris, Cedex 05 , France ; CNRS , UMR168, 75248 Paris, Cedex 05 , France ; Université Pierre et Marie Curie , 75252 Paris, Cedex 05 , France
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33
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Pissinis DE, Diaz C, Maza E, Bonini IC, Barrantes FJ, Salvarezza RC, Schilardi PL. Functional nicotinic acetylcholine receptor reconstitution in Au(111)-supported thiolipid monolayers. NANOSCALE 2015; 7:15789-15797. [PMID: 26355753 DOI: 10.1039/c5nr04109k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The insertion and function of the muscle-type nicotinic acetylcholine receptor (nAChR) in Au(111)-supported thiolipid self-assembled monolayers have been studied by atomic force microscopy (AFM), surface plasmon resonance (SPR), and electrochemical techniques. It was possible for the first time to resolve the supramolecular arrangement of the protein spontaneously inserted in a thiolipid monolayer in an aqueous solution. Geometric supramolecular arrays of nAChRs were observed, most commonly in a triangular form compatible with three nAChR dimers of ∼20 nm each. Addition of the full agonist carbamoylcholine activated and opened the nAChR ion channel, as revealed by the increase in capacitance relative to that of the nAChR-thiolipid system under basal conditions. Thus, the self-assembled system appears to be a viable biomimetic model to measure ionic conductance mediated by ion-gated ion channels under different experimental conditions, with potential applications in biotechnology and pharmacology.
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Affiliation(s)
- Diego E Pissinis
- Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), CONICET - Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC16, Suc. 4, La Plata, Buenos Aires, Argentina.
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34
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Lomora M, Dinu IA, Itel F, Rigo S, Spulber M, Palivan CG. Does Membrane Thickness Affect the Transport of Selective Ions Mediated by Ionophores in Synthetic Membranes? Macromol Rapid Commun 2015; 36:1929-1934. [DOI: 10.1002/marc.201500289] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Revised: 07/30/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Mihai Lomora
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Ionel Adrian Dinu
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Fabian Itel
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Serena Rigo
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Mariana Spulber
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
| | - Cornelia G. Palivan
- Department of Chemistry; University of Basel; Klingelbergstrasse 80 4056 Basel Switzerland
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35
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Gaitzsch J, Huang X, Voit B. Engineering Functional Polymer Capsules toward Smart Nanoreactors. Chem Rev 2015; 116:1053-93. [DOI: 10.1021/acs.chemrev.5b00241] [Citation(s) in RCA: 300] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jens Gaitzsch
- Department
of Chemistry, University College London, London WC1H 0AJ, United Kingdom
- Department
of Chemistry, University of Basel, Klingelbergstrasse 80, 4056 Basel, Basel-Stadt, Switzerland
| | - Xin Huang
- School
of Chemical Engineering and Technology, Harbin Institute of Technology, 150001 Harbin, Heilongjiang, China
| | - Brigitte Voit
- Leibniz-Institut fuer Polymerforschung Dresden e.V., Hohe Strasse 6, 01069 Dresden, Saxony, Germany
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36
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Habel J, Hansen M, Kynde S, Larsen N, Midtgaard SR, Jensen GV, Bomholt J, Ogbonna A, Almdal K, Schulz A, Hélix-Nielsen C. Aquaporin-Based Biomimetic Polymeric Membranes: Approaches and Challenges. MEMBRANES 2015; 5:307-51. [PMID: 26264033 PMCID: PMC4584284 DOI: 10.3390/membranes5030307] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 07/22/2015] [Indexed: 12/12/2022]
Abstract
In recent years, aquaporin biomimetic membranes (ABMs) for water separation have gained considerable interest. Although the first ABMs are commercially available, there are still many challenges associated with further ABM development. Here, we discuss the interplay of the main components of ABMs: aquaporin proteins (AQPs), block copolymers for AQP reconstitution, and polymer-based supporting structures. First, we briefly cover challenges and review recent developments in understanding the interplay between AQP and block copolymers. Second, we review some experimental characterization methods for investigating AQP incorporation including freeze-fracture transmission electron microscopy, fluorescence correlation spectroscopy, stopped-flow light scattering, and small-angle X-ray scattering. Third, we focus on recent efforts in embedding reconstituted AQPs in membrane designs that are based on conventional thin film interfacial polymerization techniques. Finally, we describe some new developments in interfacial polymerization using polyhedral oligomeric silsesquioxane cages for increasing the physical and chemical durability of thin film composite membranes.
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Affiliation(s)
- Joachim Habel
- Technical University of Denmark, Department of Environmental Engineering, Miljøvej, Building 113, 2800 Kgs. Lyngby, Denmark.
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
| | - Michael Hansen
- University of Copenhagen, Department of Plant and Environmental Sciences, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark.
| | - Søren Kynde
- University of Copenhagen, Copenhagen Biocenter, Ole Maaløes Vej 5, 2200 Copenhagen, Denmark.
| | - Nanna Larsen
- University of Copenhagen, Niels Bohr Institute, Hans Christian Ørsted building D, Universitetsparken, 5, 2100 Copenhagen, Denmark.
| | - Søren Roi Midtgaard
- University of Copenhagen, Copenhagen Biocenter, Ole Maaløes Vej 5, 2200 Copenhagen, Denmark.
| | | | - Julie Bomholt
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
| | - Anayo Ogbonna
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
| | - Kristoffer Almdal
- Technical University of Denmark, Department of Micro- and Nanotechnology, Produktionstorvet, Building 423, 2800 Kgs. Lyngby.
| | - Alexander Schulz
- University of Copenhagen, Department of Plant and Environmental Sciences, Thorvaldsensvej 40, 1871 Frederiksberg, Denmark.
| | - Claus Hélix-Nielsen
- Technical University of Denmark, Department of Environmental Engineering, Miljøvej, Building 113, 2800 Kgs. Lyngby, Denmark.
- Aquaporin A/S, Ole Maaløes Vej 3, 2200 Copenhagen, Denmark.
- University of Maribor, Laboratory for Water Biophysics and Membrane Processes, Faculty of Chemistry and Chemical Engineering, Smetanova ulica 17, 2000 Maribor, Slovenia.
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37
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Draghici C, Kowal J, Darjan A, Meier W, Palivan CG. "Active surfaces" formed by immobilization of enzymes on solid-supported polymer membranes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:11660-11669. [PMID: 25207981 DOI: 10.1021/la502841p] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In various domains ranging from catalysis to medical and environmental sciences, there is currently much focus on the design of surfaces that present active compounds at the interface with their environments. Here, we describe the design of "active surfaces" based on solid-supported monolayers of asymmetric triblock copolymers, which serve as templates for the attachment of enzymes. A group of poly(ethylene glycol)-block-poly(γ-methyl-ε-caprolactone)-block-poly[(2-dimethylamino) ethyl methacrylate] amphiphilic copolymers, with different hydrophilic and hydrophobic domains (PEG45-b-PMCLx-b-PDMAEMAy) was selected to generate solid-supported polymer membranes. The behavior of the copolymers in terms of their molecular arrangements at the air-water interface was established by a combination of Langmuir isotherms and Brewster angle microscopy. Uniform thin layers of copolymers were obtained by transferring films onto silica solid supports at optimal surface pressure. These solid-supported polymer membranes were characterized by assessing various properties, such as monolayer thickness, hydrophilic/hydrophobic balance, topography, and roughness. Laccase, used as an enzyme model, was successfully attached to copolymer membranes by stable interactions as followed by quartz crystal microbalance with dissipation measurements, and its activity was preserved, as indicated by activity assays. The interaction between the amphiphilic triblock copolymer films and immobilized enzymes represents a straightforward approach to engineer "active surfaces", with biomolecules playing the active role by their intrinsic bioactivity.
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Affiliation(s)
- Camelia Draghici
- Chemistry Department, University of Basel , Klingelbergstrasse 80, 4056 Basel, Switzerland
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38
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Kowal JŁ, Kowal JK, Wu D, Stahlberg H, Palivan CG, Meier WP. Functional surface engineering by nucleotide-modulated potassium channel insertion into polymer membranes attached to solid supports. Biomaterials 2014; 35:7286-94. [PMID: 24912817 DOI: 10.1016/j.biomaterials.2014.05.043] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 05/16/2014] [Indexed: 01/04/2023]
Abstract
Planar solid-supported membranes based on amphiphilic block copolymers represent promising systems for the artificial creation of structural surfaces. Here we introduce a method for engineering functional planar solid-supported membranes through insertion of active biomolecules. We show that membranes based on poly(dimethylsiloxane)-block-poly(2-methyl-2-oxazoline) (PDMS-b-PMOXA) amphiphilic diblock copolymers, which mimic natural membranes, are suitable for hosting biomolecules. Our strategy allows preparation of large-area, well-ordered polymer bilayers via Langmuir-Blodgett and Langmuir-Schaefer transfers, and insertion of biomolecules by using Bio-Beads. We demonstrate that a model membrane protein, the potassium channel from the bacterium Mesorhizobium loti, remains functional after insertion into the planar solid-supported polymer membrane. This approach can be easily extended to generate a platform of functional solid-supported membranes by insertion of different hydrophobic biomolecules, and employing different types of solid substrates for desired applications.
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Affiliation(s)
- Justyna Ł Kowal
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Julia K Kowal
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Dalin Wu
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Henning Stahlberg
- Center for Cellular Imaging and NanoAnalytics (C-CINA), Biozentrum, University of Basel, Mattenstrasse 26, 4058 Basel, Switzerland
| | - Cornelia G Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland
| | - Wolfgang P Meier
- Chemistry Department, University of Basel, Klingelbergstrasse 80, 4056 Basel, Switzerland.
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39
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Kowal J, Zhang X, Dinu IA, Palivan CG, Meier W. Planar Biomimetic Membranes Based on Amphiphilic Block Copolymers. ACS Macro Lett 2013. [DOI: 10.1021/mz400590c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Justyna Kowal
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Xiaoyan Zhang
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Ionel Adrian Dinu
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Cornelia G. Palivan
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
| | - Wolfgang Meier
- Chemistry Department, University of Basel, Klingelbergstrasse 80, CH-4056 Basel, Switzerland
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