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Bernhard C, Roeters SJ, Bauer KN, Weidner T, Bonn M, Wurm FR, Gonella G. Both Poly(ethylene glycol) and Poly(methyl ethylene phosphate) Guide Oriented Adsorption of Specific Proteins. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:14092-14097. [PMID: 31568725 DOI: 10.1021/acs.langmuir.9b02275] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Developing new functional biomaterials requires the ability to simultaneously repel unwanted and guide wanted protein adsorption. Here, we systematically interrogate the factors determining the protein adsorption by comparing the behaviors of different polymeric surfaces, poly(ethylene glycol) and a poly(phosphoester), and five different natural proteins. Interestingly we observe that, at densities comparable to those used in nanocarrier functionalization, the same proteins are either adsorbed (fibrinogen, human serum albumin, and transferrin) or repelled (immunoglobulin G and lysozyme) by both polymers. However, when adsorption takes place, the specific surface dictates the amount and orientation of each protein.
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Affiliation(s)
- Christoph Bernhard
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Steven J Roeters
- Department of Chemistry , Aarhus University , 8000 Aarhus C , Denmark
| | - Kristin N Bauer
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Tobias Weidner
- Department of Chemistry , Aarhus University , 8000 Aarhus C , Denmark
| | - Mischa Bonn
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Frederik R Wurm
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Grazia Gonella
- Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
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Sanders SE, Vanselous H, Petersen PB. Water at surfaces with tunable surface chemistries. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2018; 30:113001. [PMID: 29393860 DOI: 10.1088/1361-648x/aaacb5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Aqueous interfaces are ubiquitous in natural environments, spanning atmospheric, geological, oceanographic, and biological systems, as well as in technical applications, such as fuel cells and membrane filtration. Where liquid water terminates at a surface, an interfacial region is formed, which exhibits distinct properties from the bulk aqueous phase. The unique properties of water are governed by the hydrogen-bonded network. The chemical and physical properties of the surface dictate the boundary conditions of the bulk hydrogen-bonded network and thus the interfacial properties of the water and any molecules in that region. Understanding the properties of interfacial water requires systematically characterizing the structure and dynamics of interfacial water as a function of the surface chemistry. In this review, we focus on the use of experimental surface-specific spectroscopic methods to understand the properties of interfacial water as a function of surface chemistry. Investigations of the air-water interface, as well as efforts in tuning the properties of the air-water interface by adding solutes or surfactants, are briefly discussed. Buried aqueous interfaces can be accessed with careful selection of spectroscopic technique and sample configuration, further expanding the range of chemical environments that can be probed, including solid inorganic materials, polymers, and water immiscible liquids. Solid substrates can be finely tuned by functionalization with self-assembled monolayers, polymers, or biomolecules. These variables provide a platform for systematically tuning the chemical nature of the interface and examining the resulting water structure. Finally, time-resolved methods to probe the dynamics of interfacial water are briefly summarized before discussing the current status and future directions in studying the structure and dynamics of interfacial water.
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Affiliation(s)
- Stephanie E Sanders
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, NY 14853, United States of America
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Kocsis I, Sorci M, Vanselous H, Murail S, Sanders SE, Licsandru E, Legrand YM, van der Lee A, Baaden M, Petersen PB, Belfort G, Barboiu M. Oriented chiral water wires in artificial transmembrane channels. SCIENCE ADVANCES 2018; 4:eaao5603. [PMID: 29582016 PMCID: PMC5866074 DOI: 10.1126/sciadv.aao5603] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 02/09/2018] [Indexed: 05/13/2023]
Abstract
Aquaporins (AQPs) feature highly selective water transport through cell membranes, where the dipolar orientation of structured water wires spanning the AQP pore is of considerable importance for the selective translocation of water over ions. We recently discovered that water permeability through artificial water channels formed by stacked imidazole I-quartet superstructures increases when the channel water molecules are highly organized. Correlating water structure with molecular transport is essential for understanding the underlying mechanisms of (fast) water translocation and channel selectivity. Chirality adds another factor enabling unique dipolar oriented water structures. We show that water molecules exhibit a dipolar oriented wire structure within chiral I-quartet water channels both in the solid state and embedded in supported lipid bilayer membranes (SLBs). X-ray single-crystal structures show that crystallographic water wires exhibit dipolar orientation, which is unique for chiral I-quartets. The integration of I-quartets into SLBs was monitored with a quartz crystal microbalance with dissipation, quantizing the amount of channel water molecules. Nonlinear sum-frequency generation vibrational spectroscopy demonstrates the first experimental observation of dipolar oriented water structures within artificial water channels inserted in bilayer membranes. Confirmation of the ordered confined water is obtained via molecular simulations, which provide quantitative measures of hydrogen bond strength, connectivity, and the stability of their dipolar alignment in a membrane environment. Together, uncovering the interplay between the dipolar aligned water structure and water transport through the self-assembled I-quartets is critical to understanding the behavior of natural membrane channels and will accelerate the systematic discovery for developing artificial water channels for water desalting.
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Affiliation(s)
- Istvan Kocsis
- Institut Europeen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugene Bataillon CC047, Montpellier F-34095, France
| | - Mirco Sorci
- Howard P. Isermann Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, NY 12180–3590, USA
| | - Heather Vanselous
- Department of Chemistry and Chemical Biology, Cornell University, B46 Baker Laboratory, Ithaca, NY 14853, USA
| | - Samuel Murail
- Laboratoire de Biochimie Théorique, CNRS, UPR9080, Université Paris Diderot, Sorbonne Paris Cité, Institut de Biologie Physico-Chimique, 13, rue Pierre et Marie Curie, Paris F-75005, France
| | - Stephanie E. Sanders
- Department of Chemistry and Chemical Biology, Cornell University, B46 Baker Laboratory, Ithaca, NY 14853, USA
| | - Erol Licsandru
- Institut Europeen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugene Bataillon CC047, Montpellier F-34095, France
| | - Yves-Marie Legrand
- Institut Europeen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugene Bataillon CC047, Montpellier F-34095, France
| | - Arie van der Lee
- Institut Europeen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugene Bataillon CC047, Montpellier F-34095, France
| | - Marc Baaden
- Laboratoire de Biochimie Théorique, CNRS, UPR9080, Université Paris Diderot, Sorbonne Paris Cité, Institut de Biologie Physico-Chimique, 13, rue Pierre et Marie Curie, Paris F-75005, France
| | - Poul B. Petersen
- Department of Chemistry and Chemical Biology, Cornell University, B46 Baker Laboratory, Ithaca, NY 14853, USA
- Corresponding author. (P.B.P.); (G.B.); (M.B.)
| | - Georges Belfort
- Howard P. Isermann Department of Chemical and Biological Engineering and Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, NY 12180–3590, USA
- Corresponding author. (P.B.P.); (G.B.); (M.B.)
| | - Mihail Barboiu
- Institut Europeen des Membranes, Adaptive Supramolecular Nanosystems Group, Université de Montpellier, ENSCM, CNRS, Place Eugene Bataillon CC047, Montpellier F-34095, France
- Corresponding author. (P.B.P.); (G.B.); (M.B.)
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Sun Y, Petersen PB. Solvation Shell Structure of Small Molecules and Proteins by IR-MCR Spectroscopy. J Phys Chem Lett 2017; 8:611-614. [PMID: 28085291 DOI: 10.1021/acs.jpclett.6b02925] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The flexibility of the hydrogen-bonded network of water is the basis for its excellent solvation properties. Accordingly, it is valuable to understand the properties of water in the solvation shell surrounding small molecules and biomolecules. Recent high-quality Raman spectra analyzed with Self-Modeling Curve Resolution (SMCR) have provided Raman spectra of small-molecule solvation shells. Here we apply SMCR to the complementary technique of Fourier transform infrared (FTIR) spectroscopy in the attenuated total reflection (ATR) configuration to extract the IR spectra of solvation shells. We first illustrate the method by obtaining the IR-MCR solvation shell spectra of tert-butanol (TBA), before applying it to antifreeze protein type III. Our results show that IR-SMCR spectroscopy is a powerful method for studying the solvation shell structure of small molecules and biomolecules. Given the wide availability of FTIR-ATR instruments, the method could prove to be an impactful tool for studying solvation and solvent-mediated interactions.
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Affiliation(s)
- Yuchen Sun
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, New York 14853, United States
| | - Poul B Petersen
- Department of Chemistry and Chemical Biology, Cornell University , Ithaca, New York 14853, United States
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