1
|
Prüßner T, Meinderink D, Zhu S, Orive AG, Kielar C, Huck M, Steinrück HG, Keller A, Grundmeier G. Molecular Adhesion of a Pilus-Derived Peptide Involved in Pseudomonas aeruginosa Biofilm Formation on Non-Polar ZnO-Surfaces. Chemistry 2024; 30:e202302464. [PMID: 37909474 DOI: 10.1002/chem.202302464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/30/2023] [Accepted: 10/30/2023] [Indexed: 11/03/2023]
Abstract
Bacterial colonization and biofilm formation on abiotic surfaces are initiated by the adhesion of peptides and proteins. Understanding the adhesion of such peptides and proteins at a molecular level thus represents an important step toward controlling and suppressing biofilm formation on technological and medical materials. This study investigates the molecular adhesion of a pilus-derived peptide that facilitates biofilm formation of Pseudomonas aeruginosa, a multidrug-resistant opportunistic pathogen frequently encountered in healthcare settings. Single-molecule force spectroscopy (SMFS) was performed on chemically etched ZnO11 2 ‾ 0 ${\left(11\bar{2}0\right)}$ surfaces to gather insights about peptide adsorption force and its kinetics. Metal-free click chemistry for the fabrication of peptide-terminated SMFS cantilevers was performed on amine-terminated gold cantilevers and verified by X-ray photoelectron spectroscopy (XPS) and polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS). Atomic force microscopy (AFM) and XPS analyses reveal stable topographies and surface chemistries of the substrates that are not affected by SMFS. Rupture events described by the worm-like chain model (WLC) up to 600 pN were detected for the non-polar ZnO surfaces. The dissociation barrier energy at zero force ΔG(0), the transition state distance xb and bound-unbound dissociation rate at zero force koff (0) for the single crystalline substrate indicate that coordination and hydrogen bonds dominate the peptide/surface interaction.
Collapse
Affiliation(s)
- Tim Prüßner
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098, Paderborn, Germany
| | - Dennis Meinderink
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098, Paderborn, Germany
| | - Siqi Zhu
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098, Paderborn, Germany
| | - Alejandro G Orive
- Department of Chemistry, Materials and Nanotechnology Institute, University of La Laguna, Avda. Astrofisico Francisco Sánchez s/n, 38206, San Cristóbal de La Laguna, Spain
| | - Charlotte Kielar
- Insitute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, 01328, Dresden, Germany
| | - Marten Huck
- Chemistry Department, Paderborn University, 33098, Paderborn, Germany
| | | | - Adrian Keller
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098, Paderborn, Germany
| | - Guido Grundmeier
- Technical and Macromolecular Chemistry, Paderborn University, Warburger Str. 100, 33098, Paderborn, Germany
| |
Collapse
|
2
|
Wei W. Hofmeister Effects Shine in Nanoscience. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2023; 10:e2302057. [PMID: 37211703 PMCID: PMC10401134 DOI: 10.1002/advs.202302057] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/11/2023] [Indexed: 05/23/2023]
Abstract
Hofmeister effects play a crucial role in nanoscience by affecting the physicochemical and biochemical processes. Thus far, numerous wonderful applications from various aspects of nanoscience have been developed based on the mechanism of Hofmeister effects, such as hydrogel/aerogel engineering, battery design, nanosynthesis, nanomotors, ion sensors, supramolecular chemistry, colloid and interface science, nanomedicine, and transport behaviors, etc. In this review, for the first time, the progress of applying Hofmeister effects is systematically introduced and summarized in nanoscience. It is aimed to provide a comprehensive guideline for future researchers to design more useful Hofmeister effects-based nanosystems.
Collapse
Affiliation(s)
- Weichen Wei
- Department of NanoengineeringUniversity of California San DiegoLa JollaSan DiegoCA92093USA
| |
Collapse
|
3
|
Wei W, Chen X, Wang X. Nanopore Sensing Technique for Studying the Hofmeister Effect. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2200921. [PMID: 35484475 DOI: 10.1002/smll.202200921] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 03/22/2022] [Indexed: 06/14/2023]
Abstract
The nanopore sensing technique is an emerging method of detecting single molecules, and extensive research has gone into various fields, including nanopore sequencing and other applications of single-molecule studies. Recently, several researchers have explored the specific ion effects in nanopore channels, enabling a unique understanding of the Hofmeister effect at the single-molecule level. Herein, the recent advances of using nanopore sensing techniques are reviewed to study the Hofmeister effect and the physicochemical mechanism of this process is attempted. The challenges and goals are also discussed for the future in this field.
Collapse
Affiliation(s)
- Weichen Wei
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Xiaojuan Chen
- Department of Nanoengineering, University of California San Diego, La Jolla, CA, 92093, USA
| | - Xuejiao Wang
- Fujian Provincial University Engineering Research Center of Industrial Biocatalysis, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, 350007, China
| |
Collapse
|
4
|
Tang Y, Zhang X, Choi P, Liu Q, Xu Z. Probing Single-Molecule Adhesion of a Stimuli Responsive Oligo(ethylene glycol) Methacrylate Copolymer on a Molecularly Smooth Hydrophobic MoS 2 Basal Plane Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:10429-10438. [PMID: 28898088 DOI: 10.1021/acs.langmuir.7b01187] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Molybdenum disulfide (MoS2) has been receiving increasing attention in scientific research due to its unique properties. Up to now, several techniques have been developed to prepare exfoliated nanosize MoS2 dispersions to facilitate its applications. To improve its desired performance, as-prepared MoS2 dispersion needs further appropriate modification by polymers. Thus, understanding polymer-MoS2 interaction is of great scientific importance and practical interest. Here, we report our results on molecular interactions of a biocompatible stimuli-responsive copolymer with the basal plane surface of MoS2 determined using single molecule force spectroscopy (SMFS). Under isothermal conditions, the single-molecule adhesion force of oligo(ethylene glycol) methacrylate copolymer was found to increase from 50 to 75 pN with increasing NaCl concentration from 1 mM to 2 M, as a result of increasing hydrophobicity of the polymers. The theoretical analysis demonstrated that single-molecule adhesion force is determined by two contributions: the adhesion energy per monomer and the entropic free energy of the stretched polymer chain. Further data analysis revealed a significant increase in the adhesion energy per monomer with a negligible change in the other contribution with increasing salt concentration. The hydrophobic attraction (HA) was found to be the main contribution for the higher adhesion energy in electrolyte solutions of higher NaCl concentrations where the zero-frequency of van der Waals interaction were effectively screened. The results illustrate that oligo(ethylene glycol) methacrylate copolymer is a promising polymer for functionalizing MoS2 and that one can simply change the salt concentration to modulate the single-molecule interactions for desired applications.
Collapse
Affiliation(s)
- Yuechao Tang
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Xurui Zhang
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Phillip Choi
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Qingxia Liu
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| | - Zhenghe Xu
- Department of Chemical and Materials Engineering, University of Alberta , Edmonton, Alberta T6G 1H9, Canada
| |
Collapse
|
5
|
Li Z, Zhang B, Song Y, Xue Y, Wu L, Zhang W. Single Molecule Study on Polymer-Nanoparticle Interactions: The Particle Shape Matters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7615-7621. [PMID: 28719217 DOI: 10.1021/acs.langmuir.7b01698] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The study on the nanoparticle-polymer interactions is very important for the design/preparation of high performance polymer nanocomposite. Here we present a method to quantify the polymer-particle interaction at single molecule level by using AFM-based single molecule force spectroscopy (SMFS). As a proof-of-concept study, we choose poly-l-lysine (PLL) as the polymer and several different types of polyoxometalates (POM) as the model particles to construct several different polymer nanocomposites and to reveal the binding mode and quantify the binding strength in these systems. Our results reveal that the shape of the nanoparticle and the binding geometry in the composite have significantly influenced the binding strength of the PLL/POM complexes. Our dynamic force spectroscopy studies indicate that the disk-like geometry facilitate the unbinding of PLL/AlMo6 complexes in shearing mode, while the unzipping mode becomes dominate in spherical PLL-P8W48 system. We have also systematically investigated the effects of charge numbers, particle size, and ionic strength on the binding strength and binding mode of PLL/POM, respectively. Our results show that electrostatic interactions dominate the stability of PLL/POM complexes. These findings provide a way for tuning the mechanical properties of polyelectrolyte-nanoparticle composites.
Collapse
Affiliation(s)
- Zhandong Li
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China
| | - Bin Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China
| | - Yu Song
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China
| | - Yurui Xue
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China
- Institute of Chemistry, Chinese Academy of Science , Beijing, 100190, China
| | - Lixin Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China
| | - Wenke Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, China
| |
Collapse
|
6
|
Kim S, Geryak RD, Zhang S, Ma R, Calabrese R, Kaplan DL, Tsukruk VV. Interfacial Shear Strength and Adhesive Behavior of Silk Ionomer Surfaces. Biomacromolecules 2017; 18:2876-2886. [DOI: 10.1021/acs.biomac.7b00790] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sunghan Kim
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Ren D. Geryak
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Shuaidi Zhang
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Ruilong Ma
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| | - Rossella Calabrese
- Department
of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - David L. Kaplan
- Department
of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Vladimir. V. Tsukruk
- School
of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States
| |
Collapse
|
7
|
Abstract
Silk is a protein-based material which is predominantly produced by insects and spiders. Hundreds of millions of years of evolution have enabled these animals to utilize different, highly adapted silk types in a broad variety of applications. Silk occurs in several morphologies, such as sticky glue or in the shape of fibers and can, depending on the application by the respective animal, dissipate a high mechanical energy, resist heat and radiation, maintain functionality when submerged in water and withstand microbial settling. Hence, it's unsurprising that silk piqued human interest a long time ago, which catalyzed the domestication of silkworms for the production of silk to be used in textiles. Recently, scientific progress has enabled the development of analytic tools to gain profound insights into the characteristics of silk proteins. Based on these investigations, the biotechnological production of artificial and engineered silk has been accomplished, which allows the production of a sufficient amount of silk materials for several industrial applications. This chapter provides a review on the biotechnological production of various silk proteins from different species, as well as on the processing techniques to fabricate application-oriented material morphologies.
Collapse
Affiliation(s)
- Gregor Lang
- Research Group Biopolymer Processing, University of Bayreuth, Universitätsstr. 30, 95440, Bayreuth, Germany
| | - Heike Herold
- Department of Biomaterials, University of Bayreuth, Universitätsstr. 30, 95440, Bayreuth, Germany
| | - Thomas Scheibel
- Department of Biomaterials, University of Bayreuth, Universitätsstr. 30, 95440, Bayreuth, Germany.
| |
Collapse
|
8
|
Kou X, Zhang W, Zhang W. Quantifying the Interactions between PEI and Double-Stranded DNA: Toward the Understanding of the Role of PEI in Gene Delivery. ACS APPLIED MATERIALS & INTERFACES 2016; 8:21055-21062. [PMID: 27435435 DOI: 10.1021/acsami.6b06399] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Poly(ethylene imine) (PEI) is one of the most efficient nonviral vectors, and its binding mode/strength with double-stranded DNA (dsDNA), which is still not clear, is a core area of transfection studies. In this work we used the atomic force microscopy (AFM)-based single molecule force spectroscopy (SMFS) to detect the interaction between branched PEI and dsDNA quantitatively by using a long chain DNA as a probe. Our results indicate that PEI binds to phosphoric acid skeletons of dsDNA mainly via electrostatic interactions, no obvious groove-binding or intercalation has happened. The interaction strength is about 24-25 pN, and it remains unchanged at pH 5.0 and 7.4, which correspond to the pH values in lysosomes and in the cytoplasmic matrix, respectively. However, the interaction is found to be sensitive to the ionic strength of the environment. In addition, the unbinding force shows no obvious loading rate dependence indicative of equilibrium binding/unbinding.
Collapse
Affiliation(s)
- Xiaolong Kou
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China
| | - Wei Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China
| | - Wenke Zhang
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University , Changchun 130012, People's Republic of China
| |
Collapse
|
9
|
Li HM, Chen YW, Zhu YJ, Tong CH. Numerical study of the interplay of monomer-surface electrostatic and non-electrostatic interactions in the adsorption of weak polyelectrolytes on oppositely charged surfaces. CHINESE JOURNAL OF POLYMER SCIENCE 2016. [DOI: 10.1007/s10118-016-1780-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
10
|
Werner V, Meinel L. From silk spinning in insects and spiders to advanced silk fibroin drug delivery systems. Eur J Pharm Biopharm 2015; 97:392-9. [DOI: 10.1016/j.ejpb.2015.03.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 03/07/2015] [Accepted: 03/12/2015] [Indexed: 01/24/2023]
|
11
|
Humenik M, Smith AM, Arndt S, Scheibel T. Ion and seed dependent fibril assembly of a spidroin core domain. J Struct Biol 2015; 191:130-8. [DOI: 10.1016/j.jsb.2015.06.021] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Revised: 06/19/2015] [Accepted: 06/24/2015] [Indexed: 12/13/2022]
|
12
|
Germershaus O, Werner V, Kutscher M, Meinel L. Deciphering the mechanism of protein interaction with silk fibroin for drug delivery systems. Biomaterials 2014; 35:3427-34. [DOI: 10.1016/j.biomaterials.2013.12.083] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 12/22/2013] [Indexed: 12/24/2022]
|
13
|
Balzer BN, Micciulla S, Dodoo S, Zerball M, Gallei M, Rehahn M, V Klitzing R, Hugel T. Adhesion property profiles of supported thin polymer films. ACS APPLIED MATERIALS & INTERFACES 2013; 5:6300-6306. [PMID: 23738613 DOI: 10.1021/am4013424] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Polymer coatings are frequently utilized to control and modify substrate properties. The performance of the coatings is often determined by the first polymer layers between the substrate and the bulk polymer material, which are termed interphase. Standard methods have failed to completely characterize this interphase, because its properties change significantly over a few nanometers. Here we determine the spatially resolved adhesion properties of the interphase in polyelectrolyte multilayers (PEMs) by desorbing a single polymer covalently bound to an atomic force microscope cantilever tip from PEMs with varying thickness. We show that the adhesion properties of the first few layers (up to three double layers) is dominated by the surface potential of the substrate, while thicker PEMs are controlled by cohesion in between the PEM polymers. For cohesion, the local film conformation is the crucial parameter. This finding is generalized by utilizing oligoelectrolyte multilayer (OEM) as coatings and both hydrophilic and hydrophobic polymers as polymeric force sensors.
Collapse
Affiliation(s)
- Bizan N Balzer
- IMETUM and Physik-Department, Technische Universität München, Garching, Germany
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Kienle S, Pirzer T, Krysiak S, Geisler M, Hugel T. Measuring the interaction between ions, biopolymers and interfaces--one polymer at a time. Faraday Discuss 2013; 160:329-40; discussion 389-403. [PMID: 23795508 DOI: 10.1039/c2fd20069d] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atomic force microscopy (AFM) based single polymer force spectroscopy allows to detect the interaction (energy) between single polymers and interfaces in aqueous environment. We use this method to delineate the effect of ions, pH, co-solutes and temperature on the adhesion of biopolymers onto solid substrates.
Collapse
Affiliation(s)
- Sandra Kienle
- IMETUM, Physics Department, CeNS, Technische Universität München, 85748 Garching, Germany
| | | | | | | | | |
Collapse
|
15
|
Wei Y, Thyparambil AA, Latour RA. Peptide-surface adsorption free energy comparing solution conditions ranging from low to medium salt concentrations. Chemphyschem 2012; 13:3782-5. [PMID: 23042700 DOI: 10.1002/cphc.201200527] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Indexed: 01/31/2023]
Abstract
Multi-technique methods involving surface plasmon resonance spectroscopy and atomic force microscopy provide experimental data for the characterization of peptide adsorption on self-assembled monolayers. A comparative study is carried out in phosphate-buffered saline (PBS) and potassium phosphate-buffered (PPB) water to determine the influence of the salt concentration on the adsorption behavior (see figure; ΔG(0)(ads) : free energy of peptide adsorption, F(des) : force required for peptide desorption).
Collapse
Affiliation(s)
- Yang Wei
- Bioengineering Department, Clemson University, 501 Rhodes Engineering Research Center, Clemson, SC 29634, USA
| | | | | |
Collapse
|
16
|
Tong C. The interplay of the polyelectrolyte-surface electrostatic and non-electrostatic interactions in the polyelectrolytes adsorption onto two charged objects – A self-consistent field study. J Chem Phys 2012; 137:104904. [DOI: 10.1063/1.4748815] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
17
|
Reyes-Alcaraz A, Martínez-Archundia M, Ramon E, Garriga P. Salt effects on the conformational stability of the visual G-protein-coupled receptor rhodopsin. Biophys J 2012; 101:2798-806. [PMID: 22261069 DOI: 10.1016/j.bpj.2011.09.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2010] [Revised: 09/21/2011] [Accepted: 09/26/2011] [Indexed: 11/28/2022] Open
Abstract
Membrane protein stability is a key parameter with important physiological and practical implications. Inorganic salts affect protein stability, but the mechanisms of their interactions with membrane proteins are not completely understood. We have undertaken the study of a prototypical G-protein-coupled receptor, the α-helical membrane protein rhodopsin from vertebrate retina, and explored the effects of inorganic salts on the thermal decay properties of both its inactive and photoactivated states. Under high salt concentrations, rhodopsin significantly increased its activation enthalpy change for thermal bleaching, whereas acid denaturation affected the formation of a denatured loose-bundle state for both the active and inactive conformations. This behavior seems to correlate with changes in protonated Schiff-base hydrolysis. However, chromophore regeneration with the 11-cis-retinal chromophore and MetarhodopsinII decay kinetics were slower only in the presence of sodium chloride, suggesting that in this case, the underlying phenomenon may be linked to the activation of rhodopsin and the retinal release processes. Furthermore, the melting temperature, determined by means of circular dichroism and differential scanning calorimetry measurements, was increased in the presence of high salt concentrations. The observed effects on rhodopsin could indicate that salts favor electrostatic interactions in the retinal binding pocket and indirectly favor hydrophobic interactions at the membrane protein receptor core. These effects can be exploited in applications where the stability of membrane proteins in solution is highly desirable.
Collapse
Affiliation(s)
- Arfaxad Reyes-Alcaraz
- Group of Molecular and Industrial Biotechnology, Centre de Biotecnologia Molecular, Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Terrassa, Catalonia, Spain
| | | | | | | |
Collapse
|
18
|
Liu N, Zhang W. Feeling Inter- or Intramolecular Interactions with the Polymer Chain as Probe: Recent Progress in SMFS Studies on Macromolecular Interactions. Chemphyschem 2012; 13:2238-56. [DOI: 10.1002/cphc.201200154] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Indexed: 01/30/2023]
|
19
|
Greving I, Cai M, Vollrath F, Schniepp HC. Shear-Induced Self-Assembly of Native Silk Proteins into Fibrils Studied by Atomic Force Microscopy. Biomacromolecules 2012; 13:676-82. [DOI: 10.1021/bm201509b] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Imke Greving
- Department of Zoology, University of Oxford, The Tinbergen
Building, Oxford, OX1 3PS, United Kingdom
| | - Minzhen Cai
- Applied Science
Department, The College of William and Mary, Williamsburg, Virginia 23187, United States
| | - Fritz Vollrath
- Department of Zoology, University of Oxford, The Tinbergen
Building, Oxford, OX1 3PS, United Kingdom
| | - Hannes C. Schniepp
- Applied Science
Department, The College of William and Mary, Williamsburg, Virginia 23187, United States
| |
Collapse
|
20
|
Kienle S, Liese S, Schwierz N, Netz RR, Hugel T. The effect of temperature on single-polypeptide adsorption. Chemphyschem 2012; 13:982-9. [PMID: 22290722 DOI: 10.1002/cphc.201100776] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2011] [Revised: 12/19/2011] [Indexed: 11/08/2022]
Abstract
The hydrophobic attraction (HA) is believed to be one of the main driving forces for protein folding. Understanding its temperature dependence promises a deeper understanding of protein folding. Herein, we present an approach to investigate the HA with a combined experimental and simulation approach, which is complementary to previous studies on the temperature dependence of the solvation of small hydrophobic spherical particles. We determine the temperature dependence of the free-energy change and detachment length upon desorption of single polypeptides from hydrophobic substrates in aqueous environment. Both the atomic force microscopy (AFM) based experiments and the molecular dynamics (MD) simulations show only a weak dependence of the free energy change on temperature. In fact, depending on the substrate, we find a maximum or a minimum in the temperature-dependent free energy change, meaning that the entropy increases or decreases with temperature for different substrates. These observations are in contrast to the solvation of small hydrophobic particles and can be rationalized by a compensation mechanism between the various contributions to the desorption force. On the one hand this is reminiscent of the protein folding process, where large entropic and enthalpic contributions compensate each other to result in a small free energy difference between the folded and unfolded state. On the other hand, the protein folding process shows much stronger temperature dependence, pointing to a fundamental difference between protein folding and adsorption. Nevertheless such temperature dependent single molecule desorption studies open large possibilities to study equilibrium and non-equilibrium processes dominated by the hydrophobic attraction.
Collapse
Affiliation(s)
- Sandra Kienle
- Department of Physics (E22), IMETUM, CeNS, Technische Universität München, Boltzmannstr. 11, 85748 Garching, Germany
| | | | | | | | | |
Collapse
|
21
|
Facilitating high-force single-polysaccharide stretching using covalent attachment of one end of the chain. Carbohydr Polym 2012; 87:806-815. [PMID: 34663040 DOI: 10.1016/j.carbpol.2011.08.073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Accepted: 08/23/2011] [Indexed: 11/24/2022]
Abstract
Single polysaccharide force spectroscopy has yielded particularly interesting data, the interpretation of which requires the marriage of statistical-mechanical theories of polymer physics to the complexities afforded by possible force-induced conformational transitions of the constituent sugar rings. However, the difficulty of designing handles for the specific attachment of the different ends of polysaccharide chains to substrates, such as piezoelectric scanners, cantilevers or microbeads has meant that the majority of studies to date have been carried out with the polymer physisorbed to the substrates between which it is stretched, or at best chemically attached via bonds formed at uncontrolled locations along the length of the molecule. This means that the lengths of obtained polysaccharide stretches, as well as the forces that can be placed on the molecule without generating detachment, are generally smaller than those obtainable for polymers that offer the ability to be covalently attached to substrates specifically at their ends. As a consequence it is troublesome and tedious to record a statistically significant number of force curves that extend chains to high enough forces to investigate certain conformational transitions, such as the boat-to-inverted chair, exhibited by polysaccharides such as pectin. Herein, single molecule force-extension curves have been measured for the several pectin samples using AFM. The results are compared when either (1) the polymers have been physisorbed between the cantilever and the surface of the piezo-electric scanner, under several different solvent conditions of pH and ionic strength, or (2) the polymer molecule has been chemically attached at one end to the piezo surface using a recently reported coupling procedure. In fact, using such a chemical attachment to tether the end of the polysaccharide, reduced the frequency of successful stretching events obtained in a particular location, confirming the role of surface diffusion in the physisorbed experiments. Nevertheless, when polymer stretches were successfully recorded, the force that could be applied before detachment was significantly increased, indicating that this methodology has great potential for improving the acquisition of data reporting on force-induced conformational transitions of the sugar ring that require the application of significant stresses.
Collapse
|
22
|
Gao G, Lange D, Hilpert K, Kindrachuk J, Zou Y, Cheng JT, Kazemzadeh-Narbat M, Yu K, Wang R, Straus SK, Brooks DE, Chew BH, Hancock RE, Kizhakkedathu JN. The biocompatibility and biofilm resistance of implant coatings based on hydrophilic polymer brushes conjugated with antimicrobial peptides. Biomaterials 2011; 32:3899-909. [DOI: 10.1016/j.biomaterials.2011.02.013] [Citation(s) in RCA: 254] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2011] [Accepted: 02/09/2011] [Indexed: 01/18/2023]
|
23
|
|
24
|
Acevedo-Vélez C, Andre G, Dufrêne YF, Gellman SH, Abbott NL. Single-Molecule Force Spectroscopy of β-Peptides That Display Well-Defined Three-Dimensional Chemical Patterns. J Am Chem Soc 2011; 133:3981-8. [DOI: 10.1021/ja1089183] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Claribel Acevedo-Vélez
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| | - Guillaume Andre
- Institute of Condensed Matter and Nanosciences-Bio & Soft Matter, Université Catholique de Louvain, Croix du Sud 2/18, B-1348 Louvain-la-Neuve, Belgium
| | - Yves F. Dufrêne
- Institute of Condensed Matter and Nanosciences-Bio & Soft Matter, Université Catholique de Louvain, Croix du Sud 2/18, B-1348 Louvain-la-Neuve, Belgium
| | - Samuel H. Gellman
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Nicholas L. Abbott
- Department of Chemical and Biological Engineering, University of Wisconsin—Madison, 1415 Engineering Drive, Madison, Wisconsin 53706, United States
| |
Collapse
|
25
|
Classen M, Breuer S, Baumeister W, Guckenberger R, Witt S. Force spectroscopy of substrate molecules en route to the proteasome's active sites. Biophys J 2011; 100:489-97. [PMID: 21244845 DOI: 10.1016/j.bpj.2010.12.3689] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2010] [Revised: 11/23/2010] [Accepted: 12/02/2010] [Indexed: 10/18/2022] Open
Abstract
We used an atomic force microscope to study the mechanism underlying the translocation of substrate molecules inside the proteasome. Our specific experimental setup allowed us to measure interaction forces between the 20S proteasome and its substrates. The substrate (β-casein) was covalently bound either via a thiol-Au bond or by a PEG-based binding procedure to the atomic force microscope cantilever tip and offered as bait to proteasomes from Methanosarcina mazei. The proteasomes were immobilized densely in an upright orientation on mica, which made their upper pores accessible for substrates to enter. Besides performing conventional single-molecule force spectroscopy experiments, we developed a three-step procedure that allows the detection of specific proteasome-substrate single-molecule events without tip-sample contact. Using the active 20S wild type and an inactive active-site mutant, as well as two casein mutants bound with opposite termini to the microscope tip, we detected no directional preference of the proteasome-substrate interactions. By comparing the distribution of the measured forces for the proteasome-substrate interactions, were observed that a significant proportion of interaction events occurred at higher forces for the active versus the inactive proteasome. These forces can be attributed to the translocation of substrate en route to the active sites that are harbored deep inside the proteasome.
Collapse
Affiliation(s)
- Mirjam Classen
- Department of Molecular Structural Biology, Max Planck Institute of Biochemistry, Martinsried, Germany
| | | | | | | | | |
Collapse
|
26
|
Rising A, Widhe M, Johansson J, Hedhammar M. Spider silk proteins: recent advances in recombinant production, structure-function relationships and biomedical applications. Cell Mol Life Sci 2011; 68:169-84. [PMID: 20668909 PMCID: PMC11114806 DOI: 10.1007/s00018-010-0462-z] [Citation(s) in RCA: 145] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 06/04/2010] [Accepted: 07/09/2010] [Indexed: 11/26/2022]
Abstract
Spider dragline silk is an outstanding material made up of unique proteins-spidroins. Analysis of the amino acid sequences of full-length spidroins reveals a tripartite composition: an N-terminal non-repetitive domain, a highly repetitive central part composed of approximately 100 polyalanine/glycine rich co-segments and a C-terminal non-repetitive domain. Recent molecular data on the terminal domains suggest that these have different functions. The composite nature of spidroins allows for recombinant production of individual and combined regions. Miniaturized spidroins designed by linking the terminal domains with a limited number of repetitive segments recapitulate the properties of native spidroins to a surprisingly large extent, provided that they are produced and isolated in a manner that retains water solubility until fibre formation is triggered. Biocompatibility studies in cell culture or in vivo of native and recombinant spider silk indicate that they are surprisingly well tolerated, suggesting that recombinant spider silk has potential for biomedical applications.
Collapse
Affiliation(s)
- Anna Rising
- Department of Anatomy Physiology and Biochemistry, The Biomedical Centre, Swedish University of Agricultural Sciences, 751-23 Uppsala, Sweden
| | - Mona Widhe
- Department of Anatomy Physiology and Biochemistry, The Biomedical Centre, Swedish University of Agricultural Sciences, 751-23 Uppsala, Sweden
| | - Jan Johansson
- Department of Anatomy Physiology and Biochemistry, The Biomedical Centre, Swedish University of Agricultural Sciences, 751-23 Uppsala, Sweden
| | - My Hedhammar
- Department of Anatomy Physiology and Biochemistry, The Biomedical Centre, Swedish University of Agricultural Sciences, 751-23 Uppsala, Sweden
| |
Collapse
|
27
|
Geisler M, Netz R, Hugel T. Pulling a Single Polymer Molecule off a Substrate Reveals the Binding Thermodynamics of Cosolutes. Angew Chem Int Ed Engl 2010; 49:4730-3. [DOI: 10.1002/anie.200907098] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
28
|
Geisler M, Netz R, Hugel T. Abziehen eines einzelnen Polymers von einem Substrat erschließt thermodynamische Parameter der Kosolutbindung. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200907098] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
29
|
Eisoldt L, Hardy JG, Heim M, Scheibel TR. The role of salt and shear on the storage and assembly of spider silk proteins. J Struct Biol 2010; 170:413-9. [DOI: 10.1016/j.jsb.2009.12.027] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2009] [Revised: 12/22/2009] [Accepted: 12/27/2009] [Indexed: 10/20/2022]
|
30
|
Geisler M, Hugel T. Aging of hydrogenated and oxidized diamond. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2010; 22:398-402. [PMID: 20217727 DOI: 10.1002/adma.200902198] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Michael Geisler
- IMETUM, Physics Department CeNS and Center for Integrated Protein Science Munich, Technische Universität München, 85748 Garching, Germany
| | | |
Collapse
|
31
|
Geisler M, Balzer BN, Hugel T. Polymer adhesion at the solid-liquid interface probed by a single-molecule force sensor. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:2864-2869. [PMID: 19882687 DOI: 10.1002/smll.200901237] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A method based on atomic force microscopy is used to delineate the properties that determine single-molecule adhesion onto solid substrates in aqueous environment. Hydrophobicity as well as electrical properties of the substrate and the polymer are varied. In addition, the influence of the solvent composition, in particular the effect of ions, on the molecular adhesion at the solid-liquid interface is studied. Surprisingly, the polymer and surface-related properties account for only small changes in adhesion force, while dissolved ions show a much larger effect. These results point towards the energy of solvation as the most important contribution to adhesion for a wide variety of polymers and substrate materials.
Collapse
Affiliation(s)
- Michael Geisler
- IMETUM, Physics Department, CeNS and Center for Integrated Protein Science Munich, Technische Universität München, 85748 Garching, Germany
| | | | | |
Collapse
|
32
|
Geisler M, Horinek D, Hugel T. Single Molecule Adhesion Mechanics on Rough Surfaces. Macromolecules 2009. [DOI: 10.1021/ma9017372] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
33
|
Pirzer T, Hugel T. Adsorption Mechanism of Polypeptides and Their Location at Hydrophobic Interfaces. Chemphyschem 2009; 10:2795-9. [DOI: 10.1002/cphc.200900574] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
34
|
|
35
|
Pirzer T, Geisler M, Scheibel T, Hugel T. Single molecule force measurements delineate salt, pH and surface effects on biopolymer adhesion. Phys Biol 2009; 6:025004. [DOI: 10.1088/1478-3975/6/2/025004] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
36
|
Zou Y, Rossi NAA, Kizhakkedathu JN, Brooks DE. Barrier Capacity of Hydrophilic Polymer Brushes To Prevent Hydrophobic Interactions: Effect of Graft Density and Hydrophilicity. Macromolecules 2009. [DOI: 10.1021/ma901055t] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yuquan Zou
- Centre for Blood Research, Department of Pathology and Laboratory of Medicine
- Department of Chemistry, 2350 Health Sciences Mall
- University of British Columbia, Vancouver, B.C. V6T 1Z3, Canada
| | - Nicholas A. A. Rossi
- Centre for Blood Research, Department of Pathology and Laboratory of Medicine
- Department of Chemistry, 2350 Health Sciences Mall
- University of British Columbia, Vancouver, B.C. V6T 1Z3, Canada
| | - Jayachandran N. Kizhakkedathu
- Centre for Blood Research, Department of Pathology and Laboratory of Medicine
- Department of Chemistry, 2350 Health Sciences Mall
- University of British Columbia, Vancouver, B.C. V6T 1Z3, Canada
| | - Donald E. Brooks
- Centre for Blood Research, Department of Pathology and Laboratory of Medicine
- Department of Chemistry, 2350 Health Sciences Mall
- University of British Columbia, Vancouver, B.C. V6T 1Z3, Canada
| |
Collapse
|
37
|
Patete J, Petrofsky JM, Stepan J, Waheed A, Serafin JM. Hofmeister Effect on the Interfacial Free Energy of Aliphatic and Aromatic Surfaces Studied by Chemical Force Microscopy. J Phys Chem B 2008; 113:583-8. [DOI: 10.1021/jp807876s] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jonathan Patete
- Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Jamaica, New York 11439
| | - John M. Petrofsky
- Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Jamaica, New York 11439
| | - Jeffery Stepan
- Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Jamaica, New York 11439
| | - Abdul Waheed
- Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Jamaica, New York 11439
| | - Joseph M. Serafin
- Department of Chemistry, St. John’s University, 8000 Utopia Parkway, Jamaica, New York 11439
| |
Collapse
|
38
|
Formulation of poorly water-soluble substances using self-assembling spider silk protein. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.04.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
39
|
Sonnenberg L, Billon L, Gaub HE. Competitive Adhesion Reduces the Effective Bridging Length of Polymers. Macromolecules 2008. [DOI: 10.1021/ma702600y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lars Sonnenberg
- Lehrstuhl für Angewandte Physik and Center for NanoScience, Ludwig-Maximilians-Universität München, Amalienstr. 54, 80799 München, Germany, and IPREM/EPCP UMR5254, Université de Pau et des pays de l’Adour, Hélioparc Pau-Pyrénées, 2 Av Président Angot, 64053 Pau Cedex 09, France
| | - Laurent Billon
- Lehrstuhl für Angewandte Physik and Center for NanoScience, Ludwig-Maximilians-Universität München, Amalienstr. 54, 80799 München, Germany, and IPREM/EPCP UMR5254, Université de Pau et des pays de l’Adour, Hélioparc Pau-Pyrénées, 2 Av Président Angot, 64053 Pau Cedex 09, France
| | - Hermann E. Gaub
- Lehrstuhl für Angewandte Physik and Center for NanoScience, Ludwig-Maximilians-Universität München, Amalienstr. 54, 80799 München, Germany, and IPREM/EPCP UMR5254, Université de Pau et des pays de l’Adour, Hélioparc Pau-Pyrénées, 2 Av Président Angot, 64053 Pau Cedex 09, France
| |
Collapse
|
40
|
Koo J, Gutberlet T, Czeslik C. Control of protein interfacial affinity by nonionic cosolvents. J Phys Chem B 2008; 112:6292-5. [PMID: 18416568 DOI: 10.1021/jp801981t] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In a biological cell, proteins perform their functions in a highly complex environment comprising crowding and confinement effects as well as interactions with interfaces, cosolvents, and other biomolecules. Cosolvents can stabilize or destabilize the native folded structure of proteins in solution. In this study, we show that nonionic cosolvents also affect the interfacial affinity of proteins. We use bovine ribonuclease A and a planar silica-water interface as model system and apply neutron and optical reflectometry to analyze this system. The degree of protein adsorption and the density profile of adsorbed protein molecules were determined in the absence and the presence of cosolvents. It has been found that both the protein stabilizing glycerol and the protein destabilizing urea cause a distinct reduction in protein interfacial affinity, which may represent a rather unexpected result. However, it is suggested that different mechanisms are underlying the similar effects of glycerol and urea.
Collapse
Affiliation(s)
- Juny Koo
- Technische Universität Dortmund, Fakultät Chemie, D-44221 Dortmund, Germany
| | | | | |
Collapse
|