1
|
Li Y, Yang J, He X. Characterizing polyproline II conformational change of collagen superhelix unit on adsorption on gold surface. NANOSCALE ADVANCES 2023; 5:5322-5331. [PMID: 37767030 PMCID: PMC10521299 DOI: 10.1039/d3na00185g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Accepted: 08/22/2023] [Indexed: 09/29/2023]
Abstract
The dynamic process of protein binding onto a metal surface is a frequent occurrence as gold nanoparticles are increasingly being used in biomedical applications, including wound treatment and drug transport. Collagen, as a major component of the extracellular matrix, has potentially advantageous biomedical applications, due to its excellent biocompatibility and elasticity properties. Therefore, a mechanistic comprehension of how and which species in collagen interact with gold nanoparticles is a prerequisite for collagen-gold complexes in clinical application. However, the dynamic behavior of collagen with the polyproline II (PPII) conformation on gold sheets at the molecular level is too complex to capture under current experimental conditions. Here, using molecular dynamics simulations, we investigate the adsorption process and conformational behavior of the tripeptide Gly-Pro-Hyp with the repetitive unit of the collagen superhelix on the gold surface as a function of number of repeating units from 1 to 10. The different numbers of repeating units all prefer to approach the gold surface and adsorb via charged residues at the C-terminal or N-terminal ends, tending to form arch structures on the gold surface. Compared with the various tripeptide units in solution still retaining the native PPII conformation, the presence of the gold surface affects the formation of hydrogen bonds between the protein and water molecules, thus disrupting the PPII conformation of collagen. Specifically, the interaction between the gold surface and HYP limits the rotation of the dihedral angle of collagen, resulting in a tendency for the PPII conformation of the gold surface to transform to the β-sheet conformation. The results provide an indication of how to improve the interaction between the terminal groups and the gold surface for the design of a bioavailable protein-gold material for medicinal purposes.
Collapse
Affiliation(s)
- Yuntao Li
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| | - Jinrong Yang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
| | - Xiao He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Shanghai Frontiers Science Center of Molecule Intelligent Syntheses, School of Chemistry and Molecular Engineering, East China Normal University Shanghai 200062 China
- New York University-East China Normal University Center for Computational Chemistry, New York University Shanghai Shanghai 200062 China
| |
Collapse
|
2
|
Bourassin N, Barbault F, Baaden M, Sacquin-Mora S. Between Two Walls: Modeling the Adsorption Behavior of β-Glucosidase A on Bare and SAM-Functionalized Gold Surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1313-1323. [PMID: 35050631 DOI: 10.1021/acs.langmuir.1c01774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The efficient immobilization of enzymes on surfaces remains a complex but central issue in the biomaterials field, which requires us to understand this process at the atomic level. Using a multiscale approach combining all-atom molecular dynamics and coarse-grain Brownian dynamics simulations, we investigated the adsorption behavior of β-glucosidase A (βGA) on bare and self-assembled monolayer (SAM)-functionalized gold surfaces. We monitored the enzyme position and orientation during the molecular dynamics (MD) trajectories and measured the contacts it forms with both surfaces. While the adsorption process has little impact on the protein conformation, it can nonetheless perturb its mechanical properties and catalytic activity. Our results show that compared to the SAM-functionalized surface, the adsorption of βGA on bare gold is more stable, but less specific, and more likely to disrupt the enzyme's function. This observation emphasizes the fact that the structural organization of proteins at the solid interface is a key point when designing devices based on enzyme immobilization, as one must find an acceptable stability-activity trade-off.
Collapse
Affiliation(s)
- Nicolas Bourassin
- Laboratoire de Biochimie Théorique, UPR 9080, Université de Paris, CNRS, 13 rue Pierre et Marie Curie, 75005 Paris, France
- Institut de Biologie Physico-Chimique-Fondation Edmond de Rothschild, PSL Research University, 75005 Paris, France
| | | | - Marc Baaden
- Laboratoire de Biochimie Théorique, UPR 9080, Université de Paris, CNRS, 13 rue Pierre et Marie Curie, 75005 Paris, France
- Institut de Biologie Physico-Chimique-Fondation Edmond de Rothschild, PSL Research University, 75005 Paris, France
| | - Sophie Sacquin-Mora
- Laboratoire de Biochimie Théorique, UPR 9080, Université de Paris, CNRS, 13 rue Pierre et Marie Curie, 75005 Paris, France
- Institut de Biologie Physico-Chimique-Fondation Edmond de Rothschild, PSL Research University, 75005 Paris, France
| |
Collapse
|
3
|
Lecot S, Chevolot Y, Phaner-Goutorbe M, Yeromonahos C. Impact of Silane Monolayers on the Adsorption of Streptavidin on Silica and Its Subsequent Interactions with Biotin: Molecular Dynamics and Steered Molecular Dynamics Simulations. J Phys Chem B 2020; 124:6786-6796. [PMID: 32663028 DOI: 10.1021/acs.jpcb.0c04382] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Protein adsorption on surfaces is used in analytical tools as an immobilization mean to trap the analyte to be detected. However, protein adsorption can lead to a conformational change in the protein structure, resulting in a loss of bioactivity. Here, we study adsorption of a streptavidin-biotin complex on amorphous SiO2 surfaces functionalized with five different silane self-assembled monolayers by all-atom molecular dynamics simulations. We find that the streptavidin global conformational change, as well as the nature of residues with high mobility, depends on the alkyl chain length and head-group charge of silane molecules. Effects on interactions with biotin are further investigated by steered molecular dynamics (SMD) simulations, which mimics atomic force microscopy (AFM) with the biotin attached on the tip. We show the combined effects of adsorption-induced global conformational changes and of the position of residues with high mobility on the streptavidin-biotin rupture force. By comparing our results to experimental and SMD rupture forces obtained in water, without any surface, we conclude that silane with uncharged and short alkyl chains allows streptavidin immobilization, while keeping biotin interactions better than silanes with long alkyl chains or charged head groups.
Collapse
Affiliation(s)
- Solène Lecot
- Université de Lyon, Institut des Nanotechnologies de Lyon UMR 5270, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully, France
| | - Yann Chevolot
- Université de Lyon, Institut des Nanotechnologies de Lyon UMR 5270, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully, France
| | - Magali Phaner-Goutorbe
- Université de Lyon, Institut des Nanotechnologies de Lyon UMR 5270, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully, France
| | - Christelle Yeromonahos
- Université de Lyon, Institut des Nanotechnologies de Lyon UMR 5270, Ecole Centrale de Lyon, 36 avenue Guy de Collongue, 69134 Ecully, France
| |
Collapse
|
4
|
Nienhaus K, Nienhaus GU. Towards a molecular-level understanding of the protein corona around nanoparticles – Recent advances and persisting challenges. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2019. [DOI: 10.1016/j.cobme.2019.01.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
|
5
|
Tang M, Gandhi NS, Burrage K, Gu Y. Adsorption of Collagen-like Peptides onto Gold Nanosurfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:4435-4444. [PMID: 30864812 DOI: 10.1021/acs.langmuir.8b03680] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The molecular behavior of proteins in the presence of inorganic surfaces is of fundamental biological significance. Examples include extracellular matrix proteins interacting with gold nanoparticles and metallic implant biomaterials, such as titanium and stainless steels. Uncharged inorganic surfaces that interact strongly with the solution phase (hydrophilic surfaces) have been commonly used in disease treatments. A deep understanding of the molecular behavior of body proteins in the presence of hydrophilic surfaces is important in terms of clinical applications. However, the adsorption mechanism of proteins onto hydrophilic surfaces remains not fully understood. Here, comprehensive molecular dynamics simulations are carried out to study the molecular response of a human collagen molecule segment (CMS) to the presence of a planar gold surface (AuNS) in explicit solvent, aiming to unravel the adsorption mechanism of proteins onto hydrophilic surfaces. The results demonstrate that in the presence of AuNS, the CMS first biasedly diffuses toward AuNS, followed by anchoring to the gold surface, and finally adsorbs stepwise onto AuNS, where the protein adjusts its structure to maximize the interaction with AuNS. We conclude that adsorption of proteins onto hydrophilic surfaces adheres to three steps, namely, biased diffusion, anchoring, and stepwise adsorption accompanied by structural adaptation. The obtained adsorption mechanism provides insights into the development of inorganic surfaces for biomedical and therapeutic applications.
Collapse
|
6
|
Tang M, Gandhi NS, Burrage K, Gu Y. Interaction of gold nanosurfaces/nanoparticles with collagen-like peptides. Phys Chem Chem Phys 2019; 21:3701-3711. [PMID: 30361726 DOI: 10.1039/c8cp05191g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Nanotechnology has quickly emerged as a promising research field with potential effects in disease treatments. For example, gold nanoparticles (AuNPs) have been extensively used in diagnostics and therapeutics. When administrated into human tissues, AuNPs first encounter extracellular matrix (ECM) molecules. Amongst all the ECM components, collagen is the main tension-resisting constituent, whose biofunctional and mechanical properties are strongly dependent on its hierarchical structure. Therefore, an in-depth understanding of the structural response of collagen to the presence of gold nanosurfaces (AuNS) and AuNPs is crucial in terms of clinical applications of AuNPs. However, detailed understanding of the molecular-level and atomic-level interaction between AuNS/AuNPs and collagen in the ECM is elusive. In this study, comprehensive molecular dynamics (MD) simulations have been performed to investigate the molecular behaviour of a collagen molecule segment (CMS) in the presence of AuNS/AuNPs in explicit water, aiming to explore the interaction of AuNS/AuNPs with collagen triple helices at the molecular and atomic levels. The results show that the CMS forms a rapid association with AuNS/AuNPs and undergoes a severe unfolding upon adsorption on AuNS/AuNPs, indicating an unfolding propensity of gold surfaces. We conclude that collagen triple helices unfold readily on AuNS and bare AuNPs, due to the interaction of gold surfaces with the protein backbone. The revealed clear unfolding nature and the unravelled atomic-level unfolding mechanism of collagen triple helices onto AuNPs contribute to the development of AuNPs for biomedical and therapeutic applications, and the design of gold-binding proteins.
Collapse
Affiliation(s)
- Ming Tang
- School of Chemistry Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Australia.
| | | | | | | |
Collapse
|
7
|
Marquetti I, Desai S. Orientation effects on the nanoscale adsorption behavior of bone morphogenetic protein-2 on hydrophilic silicon dioxide. RSC Adv 2019; 9:906-916. [PMID: 35517634 PMCID: PMC9059500 DOI: 10.1039/c8ra09165j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 12/13/2018] [Indexed: 11/25/2022] Open
Abstract
Bone Morphogenetic Protein-2 (BMP-2) is a growth factor associated with different developmental functions in regenerative medicine and tissue engineering. Because of its favorable properties for the development of bone and cartilage tissue, BMP-2 promotes the biocompatibility of medical implants. In this research, molecular dynamics simulations were implemented to simulate the interaction of BMP-2 with a flat hydrophilic silicon dioxide substrate, an important biomaterial for medical applications. We considered the influence of four orthogonal protein orientations on the adsorption behavior. Results showed that arginine and lysine were the main residues to interact with the silicon dioxide substrate, directly adsorbing onto the surface and overcoming water layers. However, between these charged residues, we observed a preference for arginine to adsorb. Orientations with the α-helix loop closer to the surface at the beginning of the simulations had greater loss of secondary structure as compared to the other configurations. Among all the orientations, the end-on B configuration had favorable adsorption characteristics with a binding energy of 14 000 kJ mol−1 and retention of 21.7% β-sheets as confirmed by the Ramachandran plots. This research provides new insights into the nanoscale interaction of BMP-2 and silicon dioxide substrate with applications in orthopedic implants and regenerative medicine. Preferential binding of charged residues with hydrophilic silicon dioxide substrate during adsorption of BMP-2 in end-on B configuration.![]()
Collapse
Affiliation(s)
- Izabele Marquetti
- Department of Industrial & Systems Engineering
- North Carolina A&T State University
- Greensboro
- USA
| | - Salil Desai
- Department of Industrial & Systems Engineering
- North Carolina A&T State University
- Greensboro
- USA
- Wake Forest Institute for Regenerative Medicine
| |
Collapse
|
8
|
Perfilieva OA, Pyshnyi DV, Lomzov AA. Molecular Dynamics Simulation of Polarizable Gold Nanoparticles Interacting with Sodium Citrate. J Chem Theory Comput 2018; 15:1278-1292. [DOI: 10.1021/acs.jctc.8b00362] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Olga A. Perfilieva
- Institute of Chemical
Biology and Fundamental Medicine, SB RAS, 8 Lavrentiev Avenue, Novosibirsk 630090, Russia
| | - Dmitrii V. Pyshnyi
- Institute of Chemical
Biology and Fundamental Medicine, SB RAS, 8 Lavrentiev Avenue, Novosibirsk 630090, Russia
- Novosibirsk State
University, 2 Pirogova Street, Novosibirsk 630090, Russia
| | - Alexander A. Lomzov
- Institute of Chemical
Biology and Fundamental Medicine, SB RAS, 8 Lavrentiev Avenue, Novosibirsk 630090, Russia
- Novosibirsk State
University, 2 Pirogova Street, Novosibirsk 630090, Russia
| |
Collapse
|
9
|
John T, Gladytz A, Kubeil C, Martin LL, Risselada HJ, Abel B. Impact of nanoparticles on amyloid peptide and protein aggregation: a review with a focus on gold nanoparticles. NANOSCALE 2018; 10:20894-20913. [PMID: 30225490 DOI: 10.1039/c8nr04506b] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Society is increasingly exposed to nanoparticles as they are ubiquitous in nature and introduced as man-made air pollutants and as functional ingredients in cosmetic products as well as in nanomedicine. Nanoparticles differ in size, shape and material properties. In addition to their intended function, the side effects on biochemical processes in organisms remain unclear. Nanoparticles can significantly influence the nucleation and aggregation process of peptides. The development of several neurodegenerative diseases, such as Alzheimer's disease, is related to the aggregation of peptides into amyloid fibrils. However, there is no comprehensive or universal mechanism to predict or explain apparent acceleration or inhibition of these aggregation processes. In this work, selected studies and possible mechanisms for amyloid peptide nucleation and aggregation, in the presence of nanoparticles, are highlighted. These studies are discussed in the context of recent data from our group on the role of gold nanoparticles in amyloid peptide aggregation using experimental methods and large-scale molecular dynamics simulations. A complex interplay of the surface properties of the nanoparticles, the properties of the peptides, as well as the resulting forces between both the nanoparticles and the peptides, appear to determine whether amyloid peptide aggregation is influenced, catalysed or inhibited by the presence of nanoparticles.
Collapse
Affiliation(s)
- Torsten John
- Leibniz Institute of Surface Engineering (IOM), Permoserstraße 15, 04318 Leipzig, Germany.
| | | | | | | | | | | |
Collapse
|
10
|
Connell DJ, Gebril A, Khan MAH, Patwardhan SV, Kubiak-Ossowska K, Ferro VA, Mulheran PA. Rationalising drug delivery using nanoparticles: a combined simulation and immunology study of GnRH adsorbed to silica nanoparticles. Sci Rep 2018; 8:17115. [PMID: 30459397 PMCID: PMC6244087 DOI: 10.1038/s41598-018-35143-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 10/26/2018] [Indexed: 11/30/2022] Open
Abstract
Silica nanoparticles (SiNPs) have been shown to have significant potential for drug delivery and as adjuvants for vaccines. We have simulated the adsorption of GnRH-I (gonadotrophin releasing hormone I) and a cysteine-tagged modification (cys-GnRH-I) to model silica surfaces, as well as its conjugation to the widely-used carrier protein bovine serum albumin (BSA). Our subsequent immunological studies revealed no significant antibody production was caused by the peptide-SiNP systems, indicating that the treatment was not effective. However, the testosterone response with the native peptide-SiNPs indicated a drug effect not found with cys-GnRH-I-SiNPs; this behaviour is explained by the specific orientation of the peptides at the silica surface found in the simulations. With the BSA systems, we found significant testosterone reduction, particularly for the BSA-native conjugates, and an antibody response that was notably higher with the SiNPs acting as an adjuvant; this behaviour again correlates well with the epitope presentation predicted by the simulations. The range of immunological and hormone response can therefore be interpreted and understood by the simulation results and the presentation of the peptides to solution, paving the way for the future rational design of drug delivery and vaccine systems guided by biomolecular simulation.
Collapse
Affiliation(s)
- David J Connell
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK
| | - Ayman Gebril
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Mohammad A H Khan
- Department of Pathology, Faculty of Veterinary Science, Bangladesh Agricultural University, Mymensingh, 2202, Bangladesh
| | - Siddharth V Patwardhan
- Department of Chemical and Biological Engineering, The University of Sheffield, Western Bank, Sheffield, S10 2TN, UK
| | - Karina Kubiak-Ossowska
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK
| | - Valerie A Ferro
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 161 Cathedral Street, Glasgow, G4 0RE, UK
| | - Paul A Mulheran
- Department of Chemical and Process Engineering, University of Strathclyde, 75 Montrose Street, Glasgow, G1 1XJ, UK.
| |
Collapse
|
11
|
Inner-View of Nanomaterial Incited Protein Conformational Changes: Insights into Designable Interaction. RESEARCH 2018; 2018:9712832. [PMID: 31549040 PMCID: PMC6750102 DOI: 10.1155/2018/9712832] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2018] [Accepted: 08/16/2018] [Indexed: 12/19/2022]
Abstract
Nanoparticle bioreactivity critically depends upon interaction between proteins and nanomaterials (NM). The formation of the "protein corona" (PC) is the effect of such nanoprotein interactions. PC has a wide usage in pharmaceuticals, drug delivery, medicine, and industrial biotechnology. Therefore, a detailed in-vitro, in-vivo, and in-silico understanding of nanoprotein interaction is fundamental and has a genuine contemporary appeal. NM surfaces can modify the protein conformation during interaction, or NMs themselves can lead to self-aggregations. Both phenomena can change the whole downstream bioreactivity of the concerned nanosystem. The main aim of this review is to understand the mechanistic view of NM-protein interaction and recapitulate the underlying physical chemistry behind the formation of such complicated macromolecular assemblies, to provide a critical overview of the different models describing NM induced structural and functional modification of proteins. The review also attempts to point out the current limitation in understanding the field and highlights the future scopes, involving a plausible proposition of how artificial intelligence could be aided to explore such systems for the prediction and directed design of the desired NM-protein interactions.
Collapse
|
12
|
Hinrichs K, Shaykhutdinov T. Polarization-Dependent Atomic Force Microscopy-Infrared Spectroscopy (AFM-IR): Infrared Nanopolarimetric Analysis of Structure and Anisotropy of Thin Films and Surfaces. APPLIED SPECTROSCOPY 2018; 72:817-832. [PMID: 29652171 DOI: 10.1177/0003702818763604] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Infrared techniques enable nondestructive and label-free studies of thin films with high chemical and structural contrast. In this work, we review recent progress and perspectives in the nanoscale analysis of anisotropic materials using an extended version of the atomic force microscopy-infrared (AFM-IR) technique. This advanced photothermal technique, includes polarization control of the incoming light and bridges the gap in IR spectroscopic analysis of local anisotropic material properties. Such local anisotropy occurs in a wide range of materials during molecular nucleation, aggregation, and crystallization processes. However, analysis of the anisotropy in morphology and structure can be experimentally and theoretically demanding as it is related to order and disorder processes in ranges from nanoscopic to macroscopic length scales, depending on preparation and environmental conditions. In this context IR techniques can significantly assist as IR spectra can be interpreted in the framework of optical models and numerical calculations with respect to both, the present chemical conditions as well as the micro- and nanostructure. With these extraordinary analytic possibilities, the advanced AFM-IR approach is an essential puzzle piece in direction to connect nanoscale and macroscale anisotropic thin film properties experimentally. In this review, we highlight the analytic possibilities of AFM-IR for studies on nanoscale anisotropy with a set of examples for polymer, plasmonic, and polaritonic films, as well as aggregates of large molecules and proteins.
Collapse
Affiliation(s)
- Karsten Hinrichs
- Leibniz-Institut für Analytische Wissenschaften-ISAS e.V., Berlin, Germany
| | | |
Collapse
|
13
|
Schwaminger S, Blank‐Shim SA, Borkowska‐Panek M, Anand P, Fraga‐García P, Fink K, Wenzel W, Berensmeier S. Experimental characterization and simulation of amino acid and peptide interactions with inorganic materials. Eng Life Sci 2018; 18:84-100. [PMID: 32624891 PMCID: PMC6999452 DOI: 10.1002/elsc.201700019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2017] [Revised: 06/02/2017] [Accepted: 07/03/2017] [Indexed: 02/06/2023] Open
Abstract
Inspired by nature, many applications and new materials benefit from the interplay of inorganic materials and biomolecules. A fundamental understanding of complex organic-inorganic interactions would improve the controlled production of nanomaterials and biosensors to the development of biocompatible implants for the human body. Although widely exploited in applications, the interaction of amino acids and peptides with most inorganic surfaces is not fully understood. To date, precisely characterizing complex surfaces of inorganic materials and analyzing surface-biomolecule interactions remain challenging both experimentally and computationally. This article reviews several approaches to characterizing biomolecule-surface interactions and illustrates the advantages and disadvantages of the methods presented. First, we explain how the adsorption mechanism of amino acids/peptides to inorganic surfaces can be determined and how thermodynamic and kinetic process constants can be obtained. Second, we demonstrate how this data can be used to develop models for peptide-surface interactions. The understanding and simulation of such interactions constitute a basis for developing molecules with high affinity binding domains in proteins for bioprocess engineering and future biomedical technologies.
Collapse
Affiliation(s)
| | | | | | - Priya Anand
- Institute of NanotechnologyKarlsruhe Institute of TechnologyKarlsruheGermany
| | - Paula Fraga‐García
- Bioseparation Engineering GroupTechnical University of MunichMünchenGermany
| | - Karin Fink
- Institute of NanotechnologyKarlsruhe Institute of TechnologyKarlsruheGermany
| | - Wolfgang Wenzel
- Institute of NanotechnologyKarlsruhe Institute of TechnologyKarlsruheGermany
| | - Sonja Berensmeier
- Bioseparation Engineering GroupTechnical University of MunichMünchenGermany
| |
Collapse
|
14
|
Hughes ZE, Walsh TR. Probing nano-patterned peptide self-organisation at the aqueous graphene interface. NANOSCALE 2017; 10:302-311. [PMID: 29210426 DOI: 10.1039/c7nr06441a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The peptide sequence GrBP5, IMVTESSDYSSY, is found experimentally to bind to graphene, and ex situ atomic force microscopy indicates the formation of an ordered over-layer on graphite. However, under aqueous conditions neither the molecular conformations of the adsorbed peptide chains, nor the molecular-level spatial ordering of the over-layer, has been directly resolved. Here, we use advanced molecular dynamics simulations of GrBP5, and related mutant sequences, to elucidate the adsorbed structures of both the peptide and the adsorbed peptide over-layer at the aqueous graphene interface. In agreement with a previous hypothesis, we find GrBP5 binds at the aqueous graphene interface chiefly via the tyrosine-rich C-terminal region. Our simulations of the adsorbed peptide over-layers reveal that the peptide chains form an aggregate that does not evolve further into ordered patterns. Instead, we find that the inter-chain interactions are driven by hydrogen bonding and charge-charge interactions that are not sufficiently specific to support pattern formation. Overall, we suggest that the experimentally-observed over-layer pattern may be due to the drying of the sample, and may not be prevalent at the solvated interface. However, our simulations indicate sequence modifications of GrBP5 to promote over-layer ordering under aqueous conditions.
Collapse
Affiliation(s)
- Zak E Hughes
- Institute for Frontier Materials, Deakin University, Geelong, VIC 3216, Australia.
| | | |
Collapse
|
15
|
De Leo F, Marega R, Corvaglia V, Tondo R, Lo Cicero M, Silvestrini S, Bonifazi D. Unfolding IGDQ Peptides for Engineering Motogenic Interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:7512-7528. [PMID: 28683199 DOI: 10.1021/acs.langmuir.6b04381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Extracellular matrix (ECM)-mimicking surfaces are pivotal tools in understanding adherent cell physiopathology. In this sense, we have recently reported on a discrete set of ECM-mimicking SAMs, among which only those exposing IGDQ peptide-alkanethiols sustain the adhesion of MDA-MB-231 cells by triggering FAK phosphorylation and peculiarly induce the migration of individual cancer cells on the subcentimeter scale. Starting from the experimentally observed relationship among the SAM composition, organization, and biological response, a systematic computational characterization aided in pinpointing the atomistic details through which specific composition and organization achieve the desired biological responsiveness. Specifically, the solvent, number and type of peptides, and presence or absence of surface fillers were accurately considered, creating representative model SAMs simulated by means of classical molecular dynamics (MD) with a view toward unravelling the experimental evidence, revealing how the conformational and structural features of these substrates dictate the specific motogenic responses. Through complementary experimental and computational investigations, it clearly emerges that there exists a distinct and precise mutual interaction among IGDQ-peptides, the surface fillers, and Au, which controls the structural properties of the ECM-mimicking SAMs and thus their motogenic potential.
Collapse
Affiliation(s)
- Federica De Leo
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Riccardo Marega
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Valentina Corvaglia
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
| | - Rodolfo Tondo
- School of Chemistry, Cardiff University , Park Place, Main Building, CF10 3AT Cardiff, U.K
| | - Matteo Lo Cicero
- School of Chemistry, Cardiff University , Park Place, Main Building, CF10 3AT Cardiff, U.K
| | - Simone Silvestrini
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova , V. Marzolo 1, 35131 Padova, Italy
| | - Davide Bonifazi
- Department of Chemistry, University of Namur (UNamur) , Rue de Bruxelles 61, 5000 Namur, Belgium
- School of Chemistry, Cardiff University , Park Place, Main Building, CF10 3AT Cardiff, U.K
| |
Collapse
|
16
|
Kubiak-Ossowska K, Tokarczyk K, Jachimska B, Mulheran PA. Bovine Serum Albumin Adsorption at a Silica Surface Explored by Simulation and Experiment. J Phys Chem B 2017; 121:3975-3986. [PMID: 28350173 DOI: 10.1021/acs.jpcb.7b01637] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Molecular details of BSA adsorption on a silica surface are revealed by fully atomistic molecular dynamics (MD) simulations (with a 0.5 μs trajectory), supported by dynamic light scattering (DLS), zeta potential, multiparametric surface plasmon resonance (MP-SPR), and contact angle experiments. The experimental and theoretical methods complement one another and lead to a wider understanding of the mechanism of BSA adsorption across a range of pH 3-9. The MD results show how the negatively charged BSA at pH7 adsorbs to the negatively charged silica surface, and reveal a unique orientation with preserved secondary and tertiary structure. The experiments then show that the protein forms complete monolayers at ∼ pH6, just above the protein's isoelectric point (pH5.1). The surface contact angle is maximum when it is completely coated with protein, and the hydrophobicity of the surface is understood in terms of the simulated protein conformation. The adsorption behavior at higher pH > 6 is also consistently interpreted using the MD picture; both the contact angle and the adsorbed protein mass density decrease with increasing pH, in line with the increasing magnitude of negative charge on both the protein and the surface. At lower pH < 5 the protein starts to unfold, and the adsorbed mass dramatically decreases. The comprehensive picture that emerges for the formation of oriented protein films with preserved native conformation will help guide efforts to create functional films for new technologies.
Collapse
Affiliation(s)
- Karina Kubiak-Ossowska
- Department of Chemical and Process Engineering, University of Strathclyde , James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K
| | - Karolina Tokarczyk
- J. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Science (PAS) , Niezapominajek 8, 30-239 Cracow, Poland
| | - Barbara Jachimska
- J. Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Science (PAS) , Niezapominajek 8, 30-239 Cracow, Poland
| | - Paul A Mulheran
- Department of Chemical and Process Engineering, University of Strathclyde , James Weir Building, 75 Montrose Street, Glasgow G1 1XJ, U.K
| |
Collapse
|
17
|
Abstract
Understanding protein-inorganic surface interactions is central to the rational design of new tools in biomaterial sciences, nanobiotechnology and nanomedicine. Although a significant amount of experimental research on protein adsorption onto solid substrates has been reported, many aspects of the recognition and interaction mechanisms of biomolecules and inorganic surfaces are still unclear. Theoretical modeling and simulations provide complementary approaches for experimental studies, and they have been applied for exploring protein-surface binding mechanisms, the determinants of binding specificity towards different surfaces, as well as the thermodynamics and kinetics of adsorption. Although the general computational approaches employed to study the dynamics of proteins and materials are similar, the models and force-fields (FFs) used for describing the physical properties and interactions of material surfaces and biological molecules differ. In particular, FF and water models designed for use in biomolecular simulations are often not directly transferable to surface simulations and vice versa. The adsorption events span a wide range of time- and length-scales that vary from nanoseconds to days, and from nanometers to micrometers, respectively, rendering the use of multi-scale approaches unavoidable. Further, changes in the atomic structure of material surfaces that can lead to surface reconstruction, and in the structure of proteins that can result in complete denaturation of the adsorbed molecules, can create many intermediate structural and energetic states that complicate sampling. In this review, we address the challenges posed to theoretical and computational methods in achieving accurate descriptions of the physical, chemical and mechanical properties of protein-surface systems. In this context, we discuss the applicability of different modeling and simulation techniques ranging from quantum mechanics through all-atom molecular mechanics to coarse-grained approaches. We examine uses of different sampling methods, as well as free energy calculations. Furthermore, we review computational studies of protein-surface interactions and discuss the successes and limitations of current approaches.
Collapse
|
18
|
Ramakrishnan SK, Zhu J, Gergely C. Organic-inorganic interface simulation for new material discoveries. WILEY INTERDISCIPLINARY REVIEWS-COMPUTATIONAL MOLECULAR SCIENCE 2016. [DOI: 10.1002/wcms.1277] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sathish Kumar Ramakrishnan
- Nanobiology Institute; Yale University; West Haven CT USA
- Laboratoire Charles Coulomb (L2C); UMR 5221 CNRS-Université de Montpellier; Montpellier France
| | - Jie Zhu
- Nanobiology Institute; Yale University; West Haven CT USA
| | - Csilla Gergely
- Laboratoire Charles Coulomb (L2C); UMR 5221 CNRS-Université de Montpellier; Montpellier France
| |
Collapse
|
19
|
Hiew SH, Miserez A. Squid Sucker Ring Teeth: Multiscale Structure-Property Relationships, Sequencing, and Protein Engineering of a Thermoplastic Biopolymer. ACS Biomater Sci Eng 2016; 3:680-693. [PMID: 33440495 DOI: 10.1021/acsbiomaterials.6b00284] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The arms and tentacles of Decapodiform cephalopods (squids and cuttlefish) are lined with suckers, each of which contains embedded sucker ring teeth (SRT), which are used by the animal for prey capture and handling. SRT exhibit intriguing physicochemical and thermomechanical characteristics that have so far not been observed in other protein-based biomaterials. Notably, despite their comparatively high mechanical properties, SRT are almost fully soluble in chaotropic solvents and can be readily reconstituted after solvent evaporation into three-dimensional structures. SRT also exhibit thermoplastic characteristics: they can be melted and reshaped multiple times with no-or only minimal-loss of mechanical performance postprocessing. Intrigued by these unusual material characteristics, in recent years, we have conducted in-depth fundamental studies to unveil structure/property relationships of SRT from the molecular (genetic) level to the macroscopic scale. These investigations have demonstrated that SRT are entirely assembled from a protein family called "suckerins" that self-assemble into semicrystalline polymer infinite networks. Suckerins are block copolymers at the molecular level, whose closest analogy appears to be silk fibroins, although significant differences exist between these two protein families. Parallel to these studies, there have been efforts to mimic and engineer suckerins by protein engineering and to demonstrate potential applications through proof-of-concept studies, with a focus on the biomedical field. Both fundamental aspects and emerging applications are presented in this short review. Given the rather unusual source of this model structure, we start by a brief historical account of SRT and suckerin discovery.
Collapse
Affiliation(s)
- Shu Hui Hiew
- School of Material Science and Engineering and ‡Center for Biomimetic Sensor Science, Nanyang Technological University (NTU), 50 Nanyang Drive, Singapore 639798
| | - Ali Miserez
- School of Material Science and Engineering and Center for Biomimetic Sensor Science, Nanyang Technological University (NTU), 50 Nanyang Drive, Singapore 639798
| |
Collapse
|
20
|
Gladytz A, John T, Gladytz T, Hassert R, Pagel M, Risselada HJ, Naumov S, Beck-Sickinger AG, Abel B. Peptides@mica: from affinity to adhesion mechanism. Phys Chem Chem Phys 2016; 18:23516-27. [PMID: 27491508 DOI: 10.1039/c6cp03325c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Investigating the adsorption of peptides on inorganic surfaces, on the molecular level, is fundamental for medicinal and analytical applications. Peptides can be potent as linkers between surfaces and living cells in biochips or in implantation medicine. Here, we studied the adsorption process of the positively charged pentapeptide RTHRK, a recently identified binding sequence for surface oxidized silicon, and novel analogues thereof to negatively charged mica surfaces. Homogeneous formation of monolayers in the nano- and low micromolar peptide concentration range was observed. We propose an alternative and efficient method to both quantify binding affinity and follow adhesion behavior. This method makes use of the thermodynamic relationship between surface coverage, measured by atomic force microscopy (AFM), and the concomitant free energy of adhesion. A knowledge-based fit to the autocorrelation of the AFM images was used to correct for a biased surface coverage introduced by the finite lateral resolution of the AFM. Binding affinities and mechanisms were further explored by large scale molecular dynamics (MD) simulations. The combination of well validated MD simulations with topological data from AFM revealed a better understanding of peptide adsorption processes on the atomistic scale. We demonstrate that binding affinity is strongly determined by a peptide's ability to form salt bridges and hydrogen bonds with the surface lattice. Consequently, differences in hydrogen bond formation lead to substantial differences in binding affinity despite conservation of the peptide's overall charge. Further, MD simulations give access to relative changes in binding energy of peptide variations in comparison to a lead compound.
Collapse
Affiliation(s)
- A Gladytz
- Leibniz Institute of Surface Modification (IOM), Permoserstrasse 15, 04318 Leipzig, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Charchar P, Christofferson AJ, Todorova N, Yarovsky I. Understanding and Designing the Gold-Bio Interface: Insights from Simulations. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:2395-418. [PMID: 27007031 DOI: 10.1002/smll.201503585] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/01/2016] [Indexed: 05/20/2023]
Abstract
Gold nanoparticles (AuNPs) are an integral part of many exciting and novel biomedical applications, sparking the urgent need for a thorough understanding of the physicochemical interactions occurring between these inorganic materials, their functional layers, and the biological species they interact with. Computational approaches are instrumental in providing the necessary molecular insight into the structural and dynamic behavior of the Au-bio interface with spatial and temporal resolutions not yet achievable in the laboratory, and are able to facilitate a rational approach to AuNP design for specific applications. A perspective of the current successes and challenges associated with the multiscale computational treatment of Au-bio interfacial systems, from electronic structure calculations to force field methods, is provided to illustrate the links between different approaches and their relationship to experiment and applications.
Collapse
Affiliation(s)
- Patrick Charchar
- School of Engineering, RMIT University, Melbourne, Victoria, 3001, Australia
| | | | - Nevena Todorova
- School of Engineering, RMIT University, Melbourne, Victoria, 3001, Australia
| | - Irene Yarovsky
- School of Engineering, RMIT University, Melbourne, Victoria, 3001, Australia
| |
Collapse
|
22
|
Ozboyaci M, Kokh DB, Wade RC. Three steps to gold: mechanism of protein adsorption revealed by Brownian and molecular dynamics simulations. Phys Chem Chem Phys 2016; 18:10191-200. [PMID: 27021898 DOI: 10.1039/c6cp00201c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The addition of three N-terminal histidines to β-lactamase inhibitor protein was shown experimentally to increase its binding potency to an Au(111) surface substantially but the binding mechanism was not resolved. Here, we propose a complete adsorption mechanism for this fusion protein by means of a multi-scale simulation approach and free energy calculations. We find that adsorption is a three-step process: (i) recognition of the surface predominantly by the histidine fusion peptide and formation of an encounter complex facilitated by a reduced dielectric screening of water in the interfacial region, (ii) adsorption of the protein on the surface and adoption of a specific binding orientation, and (iii) adaptation of the protein structure on the metal surface accompanied by induced fit. We anticipate that the mechanistic features of protein adsorption to an Au(111) surface revealed here can be extended to other inorganic surfaces and proteins and will therefore aid the design of specific protein-surface interactions.
Collapse
Affiliation(s)
- M Ozboyaci
- Heidelberg Institute for Theoretical Studies (HITS), Schloss-Wolfsbrunnenweg 35, 69118 Heidelberg, Germany.
| | | | | |
Collapse
|
23
|
Penna M, Ley K, Maclaughlin S, Yarovsky I. Surface heterogeneity: a friend or foe of protein adsorption – insights from theoretical simulations. Faraday Discuss 2016; 191:435-464. [DOI: 10.1039/c6fd00050a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A lack in the detailed understanding of mechanisms through which proteins adsorb or are repelled at various solid/liquid interfaces limits the capacity to rationally design and produce more sophisticated surfaces with controlled protein adsorption in both biomedical and industrial settings. To date there are three main approaches to achieve anti biofouling efficacy, namely chemically adjusting the surface hydrophobicity and introducing various degrees of surface roughness, or a combination of both. More recently, surface nanostructuring has been shown to have an effect on protein adsorption. However, the current resolution of experimental techniques makes it difficult to investigate these three phase systems at the molecular level. In this molecular dynamics study we explore in all-atom detail the adsorption process of one of the most surface active proteins, EAS hydrophobin, known for its versatile ability to self-assemble on both hydrophobic and hydrophilic surfaces forming stable monolayers that facilitate further biofilm growth. We model the adsorption of this protein on organic ligand protected silica surfaces with varying degrees of chemical heterogeneity and roughness, including fully homogenous hydrophobic and hydrophilic surfaces for comparison. We present a detailed characterisation of the functionalised surface structure and dynamics for each of these systems, and the effect the ligands have on interfacial water, the adsorption process and conformational rearrangements of the protein. Results suggest that the ligand arrangement that produces the highest hydrophilic chain mobility and the lack of significant hydrophobic patches shows the most promising anti-fouling efficacy toward hydrophobin. However, the presence on the protein surface of a flexible loop with amphipathic character (the Cys3–Cys4 loop) is seen to facilitate EAS adsorption on all surfaces by enabling the protein to match the surface pattern.
Collapse
Affiliation(s)
- Matthew Penna
- School of Engineering
- RMIT University
- Melbourne
- Australia
- ARC Research Hub for Australian Steel Manufacturing
| | - Kamron Ley
- School of Engineering
- RMIT University
- Melbourne
- Australia
| | - Shane Maclaughlin
- BlueScope Steel Research Laboratories
- Port Kembla
- Australia
- ARC Research Hub for Australian Steel Manufacturing
- Australia
| | - Irene Yarovsky
- School of Engineering
- RMIT University
- Melbourne
- Australia
- ARC Research Hub for Australian Steel Manufacturing
| |
Collapse
|
24
|
Trzeciakiewicz H, Esteves-Villanueva J, Soudy R, Kaur K, Martic-Milne S. Electrochemical Characterization of Protein Adsorption onto YNGRT-Au and VLGXE-Au Surfaces. SENSORS 2015; 15:19429-42. [PMID: 26262621 PMCID: PMC4570378 DOI: 10.3390/s150819429] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2015] [Revised: 07/30/2015] [Accepted: 08/02/2015] [Indexed: 11/16/2022]
Abstract
The adsorption of the proteins CD13, mucin and bovine serum albumin on VLGXE-Au and YNGRT-Au interfaces was monitored by electrochemical impedance spectroscopy in the presence of [Fe(CN)6]3−/4−. The hydrophobicity of the Au surface was tailored using specific peptides, blocking agents and diluents. The combination of blocking agents (ethanolamine or n-butylamine) and diluents (hexanethiol or 2-mercaptoethanol) was used to prepare various peptide-modified Au surfaces. Protein adsorption onto the peptide-Au surfaces modified with the combination of n-butylamine and hexanethiol produced a dramatic decrease in the charge transfer resistance, Rct, for all three proteins. In contrast, polar peptide-surfaces induced a minimal change in Rct for all three proteins. Furthermore, an increase in Rct was observed with CD13 (an aminopeptidase overexpressed in certain cancers) in comparison to the other proteins when the VLGXE-Au surface was modified with n-butylamine as a blocking agent. The electrochemical data indicated that protein adsorption may be modulated by tailoring the peptide sequence on Au surfaces and that blocking agents and diluents play a key role in promoting or preventing protein adsorption. The peptide-Au platform may also be used for targeting cancer biomarkers with designer peptides.
Collapse
Affiliation(s)
- Hanna Trzeciakiewicz
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, MI 48309, USA; E-Mails: (H.T.); (J.E.-V.)
| | - Jose Esteves-Villanueva
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, MI 48309, USA; E-Mails: (H.T.); (J.E.-V.)
| | - Rania Soudy
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, 87 Avenue, Edmonton, AB T6G 2E1, Canada; E-Mails: (R.S.); (K.K.)
| | - Kamaljit Kaur
- Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, 87 Avenue, Edmonton, AB T6G 2E1, Canada; E-Mails: (R.S.); (K.K.)
- Chapman University School of Pharmacy, Harry and Diane Rinker Health Science Campus, Chapman University, Irvine, CA 92618-1908, USA
| | - Sanela Martic-Milne
- Department of Chemistry, Oakland University, 2200 North Squirrel Road, Rochester, MI 48309, USA; E-Mails: (H.T.); (J.E.-V.)
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-248-370-3088; Fax: +1-248-370-2321
| |
Collapse
|
25
|
Cantaert B, Ding D, Rieu C, Petrone L, Hoon S, Kock KH, Miserez A. Stable Formation of Gold Nanoparticles onto Redox-Active Solid Biosubstrates Made of Squid Suckerin Proteins. Macromol Rapid Commun 2015; 36:1877-1883. [DOI: 10.1002/marc.201500218] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 05/29/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Bram Cantaert
- Biological and Biomimetic Materials Laboratory; School of Materials Science and Engineering; Nanyang Technological University; Singapore 637553 Singapore
| | - Dawei Ding
- Biological and Biomimetic Materials Laboratory; School of Materials Science and Engineering; Nanyang Technological University; Singapore 637553 Singapore
| | - Clément Rieu
- Biological and Biomimetic Materials Laboratory; School of Materials Science and Engineering; Nanyang Technological University; Singapore 637553 Singapore
| | - Luigi Petrone
- Biological and Biomimetic Materials Laboratory; School of Materials Science and Engineering; Nanyang Technological University; Singapore 637553 Singapore
| | - Shawn Hoon
- Molecular Engineering Laboratory; Biomedical Sciences Institutes; Agency for Science; Technology and Research (A*Star); Proteos 138673 Singapore
| | - Kian Hong Kock
- Molecular Engineering Laboratory; Biomedical Sciences Institutes; Agency for Science; Technology and Research (A*Star); Proteos 138673 Singapore
| | - Ali Miserez
- Biological and Biomimetic Materials Laboratory; School of Materials Science and Engineering; Nanyang Technological University; Singapore 637553 Singapore
- School of Biological Sciences; Nanyang Technological University; Singapore 637551 Singapore
| |
Collapse
|
26
|
Ramezani F, Habibi M, Rafii-Tabar H, Amanlou M. Effect of peptide length on the conjugation to the gold nanoparticle surface: a molecular dynamic study. ACTA ACUST UNITED AC 2015; 23:9. [PMID: 25630230 PMCID: PMC4312466 DOI: 10.1186/s40199-014-0085-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2014] [Accepted: 12/17/2014] [Indexed: 11/10/2022]
Abstract
BACKGROUND Gold nanoparticles now command a great deal of attention for medical applications. Despite the importance of nano-bio interfaces, interaction between peptides and proteins with gold surfaces is not still fully understood, especially in a molecular level. METHODS In the present study computational simulation of adsorption of 20 amino acids, in three forms of mono-amino acid, homo di-peptide and homo tri-peptide, on the gold nanoparticles was performed by Gromacs using OPLSAA force field. The flexibility, stability, and size effect of the peptides on the gold nanoparticles were studied as well as the molecular structure of them. RESULTS According to our results, adsorbed homo tri-peptides on the gold surface had more flexibility, more gyration, and the farthest distance from the GNP in comparison with homo di-peptides and mono-amino acids. CONCLUSION Our findings provide new insights into the precise control of interactions between amino acids anchored on the GNPs.
Collapse
Affiliation(s)
| | | | | | - Massoud Amanlou
- Department of Medicinal Chemistry, Faculty of Pharmacy and Pharmaceutical Sciences Research Center, Tehran University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
27
|
Gopalakrishnan R, Azhagiya Singam ER, Vijaya Sundar J, Subramanian V. Interaction of collagen like peptides with gold nanosurfaces: a molecular dynamics investigation. Phys Chem Chem Phys 2015; 17:5172-86. [DOI: 10.1039/c4cp04969a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, an attempt has been made to understand the interaction between collagen like peptides (CPs) with a gold nanosurface (AuNS) using a classical molecular dynamics simulation.
Collapse
Affiliation(s)
- R. Gopalakrishnan
- Chemical laboratory
- Council of Scientific and Industrial Research
- Central Leather Research Institute
- Chennai-600020
- India
| | - E. R. Azhagiya Singam
- Chemical laboratory
- Council of Scientific and Industrial Research
- Central Leather Research Institute
- Chennai-600020
- India
| | - J. Vijaya Sundar
- Chemical laboratory
- Council of Scientific and Industrial Research
- Central Leather Research Institute
- Chennai-600020
- India
| | - V. Subramanian
- Chemical laboratory
- Council of Scientific and Industrial Research
- Central Leather Research Institute
- Chennai-600020
- India
| |
Collapse
|
28
|
Ramezani F, Rafii-Tabar H. An in-depth view of human serum albumin corona on gold nanoparticles. MOLECULAR BIOSYSTEMS 2014; 11:454-62. [PMID: 25409650 DOI: 10.1039/c4mb00591k] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Upon entering biological systems, such as the blood stream, nanoparticles form molecular complexes with the proteins encountered called protein coronas, which shield the surface of the exogenous nanoparticle. The most abundant blood proteins, such as albumin, initially occupy the surface of the nanoparticle. Owing to the widespread applications of gold nanoparticles in medicine, in this study, the docking of human serum albumin to gold nanoparticles was examined and the changes in protein structure were investigated by a molecular dynamic simulation and GOLP force field. The results showed that after the adsorption of albumin on the gold nanoparticle, human serum albumin was denatured and the amount of alpha-helix significantly decreased. Domain III, which has a large cavity of fatty acids binding sites, plays an important role in the adsorption on the gold nanoparticles. Lys464, Thr504, Phe505, and Leu581 are critical amino acids in HSA adsorption on the GNPs. After the adsorption of albumin on the surface of gold nanoparticles, the fluctuations in some of the domains of the protein increased. Variations in the helix properties, such as helix length, dipole, radius, average phi and psi angles, and the length of hydrogen bonds, were calculated in detail.
Collapse
Affiliation(s)
- Fatemeh Ramezani
- Department of Medical Physics and Biomedical Engineering, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | | |
Collapse
|
29
|
Wright LB, Merrill NA, Knecht MR, Walsh TR. Structure of arginine overlayers at the aqueous gold interface: implications for nanoparticle assembly. ACS APPLIED MATERIALS & INTERFACES 2014; 6:10524-10533. [PMID: 24914448 DOI: 10.1021/am502119g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Adsorption of small biomolecules onto the surface of nanoparticles offers a novel route to generation of nanoparticle assemblies with predictable architectures. Previously, ligand-exchange experiments on citrate-capped gold nanoparticles with the amino acid arginine were reported to support linear nanoparticle assemblies. Here, we use a combination of atomistic modeling with experimental characterization to explore aspects of the assembly hypothesis for these systems. Using molecular simulation, we probe the structural and energetic characteristics of arginine overlayers on the Au(111) surface under aqueous conditions at both low- and high-coverage regimes. In the low-density regime, the arginines lie flat on the surface. At constant composition, these overlayers are found to be lower in energy than the densely packed films, although the latter case appears kinetically stable when arginine is adsorbed via the zwitterion group, exposing the charged guanidinium group to the solvent. Our findings suggest that zwitterion-zwitterion hydrogen bonding at the gold surface and minimization of the electrostatic repulsion between adjacent guanidinium groups play key roles in determining arginine overlayer stability at the aqueous gold interface. Ligand-exchange experiments of citrate-capped gold nanoparticles with arginine derivatives agmatine and N-methyl-l-arginine reveal that modification at the guanidinium group significantly diminishes the propensity for linear assembly of the nanoparticles.
Collapse
Affiliation(s)
- Louise B Wright
- Department of Chemistry and Centre for Scientific Computing, University of Warwick , Gibbett Hill Road, Coventry, CV4 7AL, United Kingdom
| | | | | | | |
Collapse
|
30
|
Wang R, Wang W, Ren H, Chae J. Detection of copper ions in drinking water using the competitive adsorption of proteins. Biosens Bioelectron 2014; 57:179-85. [DOI: 10.1016/j.bios.2014.01.056] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2013] [Revised: 01/27/2014] [Accepted: 01/28/2014] [Indexed: 10/25/2022]
|
31
|
Penna MJ, Mijajlovic M, Biggs MJ. Molecular-level understanding of protein adsorption at the interface between water and a strongly interacting uncharged solid surface. J Am Chem Soc 2014; 136:5323-31. [PMID: 24506166 DOI: 10.1021/ja411796e] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Although protein adsorption on solids is of immense relevance, experimental limitations mean there is still a remarkable lack of understanding of the adsorption mechanism, particularly at a molecular level. By subjecting 240+ molecular dynamics simulations of two peptide/water/solid surface systems to statistical analysis, a generalized molecular level mechanism for peptide adsorption has been identified for uncharged surfaces that interact strongly with the solution phase. This mechanism is composed of three phases: (1) biased diffusion of the peptide from the bulk phase toward the surface; (2) anchoring of the peptide to the water/solid interface via interaction of a hydrophilic group with the water adjacent to the surface or a strongly interacting hydrophobic group with the surface; and (3) lockdown of the peptide on the surface via a slow, stepwise and largely sequential adsorption of its residues, which we term 'statistical zippering'. The adsorption mechanism is dictated by the existence of water layers adjacent to the solid and orientational ordering therein. By extending the solid into the solution by ~8 Å and endowing it with a charged character, the water layers ensure the peptide feels the effect of the solid at a range well beyond the dispersion force that arises from it, thus inducing biased diffusion from afar. The charging of the interface also facilitates anchoring of the peptide near the surface via one of its hydrophilic groups, allowing it time it would otherwise not have to rearrange and lockdown. Finally, the slowness of the lockdown process is dictated by the need for the peptide groups to replace adjacent tightly bound interfacial water.
Collapse
Affiliation(s)
- Matthew J Penna
- School of Chemical Engineering, The University of Adelaide , Adelaide, Australia , 5005
| | | | | |
Collapse
|
32
|
Ramezani F, Amanlou M, Rafii-Tabar H. Comparison of amino acids interaction with gold nanoparticle. Amino Acids 2013; 46:911-20. [DOI: 10.1007/s00726-013-1642-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Accepted: 12/09/2013] [Indexed: 12/22/2022]
|
33
|
Mathé C, Devineau S, Aude JC, Lagniel G, Chédin S, Legros V, Mathon MH, Renault JP, Pin S, Boulard Y, Labarre J. Structural determinants for protein adsorption/non-adsorption to silica surface. PLoS One 2013; 8:e81346. [PMID: 24282583 PMCID: PMC3839912 DOI: 10.1371/journal.pone.0081346] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 10/11/2013] [Indexed: 11/18/2022] Open
Abstract
The understanding of the mechanisms involved in the interaction of proteins with inorganic surfaces is of major interest in both fundamental research and applications such as nanotechnology. However, despite intense research, the mechanisms and the structural determinants of protein/surface interactions are still unclear. We developed a strategy consisting in identifying, in a mixture of hundreds of soluble proteins, those proteins that are adsorbed on the surface and those that are not. If the two protein subsets are large enough, their statistical comparative analysis must reveal the physicochemical determinants relevant for adsorption versus non-adsorption. This methodology was tested with silica nanoparticles. We found that the adsorbed proteins contain a higher number of charged amino acids, particularly arginine, which is consistent with involvement of this basic amino acid in electrostatic interactions with silica. The analysis also identified a marked bias toward low aromatic amino acid content (phenylalanine, tryptophan, tyrosine and histidine) in adsorbed proteins. Structural analyses and molecular dynamics simulations of proteins from the two groups indicate that non-adsorbed proteins have twice as many π-π interactions and higher structural rigidity. The data are consistent with the notion that adsorption is correlated with the flexibility of the protein and with its ability to spread on the surface. Our findings led us to propose a refined model of protein adsorption.
Collapse
Affiliation(s)
- Christelle Mathé
- Laboratoire de Radiolyse, SIS2M, IRAMIS and UMR3299 CEA-CNRS, Saclay, France
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, Saclay, France
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, UMR 8587 CNRS-Université Evry Val d'Essonne, Evry, France
| | - Stéphanie Devineau
- Laboratoire de Radiolyse, SIS2M, IRAMIS and UMR3299 CEA-CNRS, Saclay, France
| | - Jean-Christophe Aude
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, Saclay, France
| | - Gilles Lagniel
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, Saclay, France
| | - Stéphane Chédin
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, Saclay, France
| | - Véronique Legros
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, UMR 8587 CNRS-Université Evry Val d'Essonne, Evry, France
| | | | | | - Serge Pin
- Laboratoire de Radiolyse, SIS2M, IRAMIS and UMR3299 CEA-CNRS, Saclay, France
| | - Yves Boulard
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, Saclay, France
- Laboratoire Structure et Dynamique par Résonance Magnétique, SIS2M, IRAMIS and UMR3299 CEA-CNRS, Saclay, France
| | - Jean Labarre
- Service de Biologie Intégrative et Génétique Moléculaire, iBiTec-S, FRE3377 CEA-CNRS-Université Paris-Sud, Saclay, France
- * E-mail:
| |
Collapse
|
34
|
Hughes ZE, Wright LB, Walsh TR. Biomolecular adsorption at aqueous silver interfaces: first-principles calculations, polarizable force-field simulations, and comparisons with gold. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:13217-13229. [PMID: 24079907 DOI: 10.1021/la402839q] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The molecular simulation of biomolecules adsorbed at noble metal interfaces can assist in the development of bionanotechnology applications. In line with advances in polarizable force fields for adsorption at aqueous gold interfaces, there is scope for developing a similar force field for silver. One way to accomplish this is via the generation of in vacuo adsorption energies calculated using first-principles approaches for a wide range of different but biologically relevant small molecules, including water. Here, we present such first-principles data for a comprehensive range of bio-organic molecules obtained from plane-wave density functional theory calculations using the vdW-DF functional. As reported previously for the gold force field, GolP-CHARMM (Wright, L. B.; Rodger, P. M.; Corni, S.; Walsh, T. R. GolP-CHARMM: first-principles based force-fields for the interaction of proteins with Au(111) and Au(100). J. Chem. Theory Comput. 2013, 9, 1616-1630), we have used these data to construct a a new force field, AgP-CHARMM, suitable for the simulation of biomolecules at the aqueous Ag(111) and Ag(100) interfaces. This force field is derived to be consistent with GolP-CHARMM such that adsorption on Ag and Au can be compared on an equal footing. Our force fields are used to evaluate the water overlayer stability on both silver and gold, finding good agreement with known behaviors. We also calculate and compare the structuring (spatial and orientational) of liquid water adsorbed at both silver and gold. Finally, we report the adsorption free energy of a range of amino acids at both the Au(111) and Ag(111) aqueous interfaces, calculated using metadynamics. Stronger adsorption on gold was noted in most cases, with the exception being the carboxylate group present in aspartic acid. Our findings also indicate differences in the binding free energy profile between silver and gold for some amino acids, notably for His and Arg. Our analysis suggests that the relatively stronger structuring of the first water layer on silver, relative to gold, could give rise to these differences.
Collapse
Affiliation(s)
- Zak E Hughes
- Institute for Frontier Materials, Deakin University , Geelong, Victoria 3216, Australia
| | | | | |
Collapse
|
35
|
Wright LB, Rodger PM, Corni S, Walsh TR. GolP-CHARMM: First-Principles Based Force Fields for the Interaction of Proteins with Au(111) and Au(100). J Chem Theory Comput 2013; 9:1616-30. [DOI: 10.1021/ct301018m] [Citation(s) in RCA: 177] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Louise B. Wright
- University of Warwick, Dept.
of Chemistry and Centre for Scientific Computing, Coventry, CV4 7AL,
United Kingdom
| | - P. Mark Rodger
- University of Warwick, Dept.
of Chemistry and Centre for Scientific Computing, Coventry, CV4 7AL,
United Kingdom
| | | | - Tiffany R. Walsh
- Deakin University,
Institute for
Frontier Materials, Geelong, Vic. 3216, Australia
| |
Collapse
|
36
|
Wright LB, Walsh TR. Efficient conformational sampling of peptides adsorbed onto inorganic surfaces: insights from a quartz binding peptide. Phys Chem Chem Phys 2013; 15:4715-26. [DOI: 10.1039/c3cp42921k] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
37
|
Nergiz SZ, Slocik JM, Naik RR, Singamaneni S. Surface defect sites facilitate fibrillation: an insight into adsorption of gold-binding peptides on Au(111). Phys Chem Chem Phys 2013; 15:11629-33. [DOI: 10.1039/c3cp50972a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
|
38
|
Bellucci L, Brancolini G, Calzolari A, Carrillo Parramon O, Corni S, Di Felice R. Proteins and Peptides at Gold Surfaces: Insights from Atomistic Simulations. ACTA ACUST UNITED AC 2012. [DOI: 10.1021/bk-2012-1120.ch010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
|
39
|
Brancolini G, Kokh DB, Calzolai L, Wade RC, Corni S. Docking of ubiquitin to gold nanoparticles. ACS NANO 2012; 6:9863-78. [PMID: 23033917 DOI: 10.1021/nn303444b] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Protein-nanoparticle associations have important applications in nanoscience and nanotechnology such as targeted drug delivery and theranostics. However, the mechanisms by which proteins recognize nanoparticles and the determinants of specificity are still poorly understood at the microscopic level. Gold is a promising material in nanoparticles for nanobiotechnology applications because of the ease of its functionalization and its tunable optical properties. Ubiquitin is a small, cysteine-free protein (ubiquitous in eukaryotes) whose binding to gold nanoparticles has been characterized recently by nuclear magnetic resonance (NMR). To reveal the molecular basis of these protein-nanoparticle interactions, we performed simulations at multiple levels (ab initio quantum mechanics, classical molecular dynamics and Brownian dynamics) and compared the results with experimental data (circular dichroism and NMR). The results provide a model of the ensemble of structures constituting the ubiquitin-gold surface complex, and insights into the driving forces for the binding of ubiquitin to gold nanoparticles, the role of nanoparticle surfactants (citrate) in the association process, and the origin of the perturbations in the NMR chemical shifts.
Collapse
Affiliation(s)
- Giorgia Brancolini
- Center S3, CNR Institute Nanoscience, Via Campi 213/A, 41125 Modena, Italy.
| | | | | | | | | |
Collapse
|
40
|
Shemetov AA, Nabiev I, Sukhanova A. Molecular interaction of proteins and peptides with nanoparticles. ACS NANO 2012; 6:4585-602. [PMID: 22621430 DOI: 10.1021/nn300415x] [Citation(s) in RCA: 298] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The interaction of proteins in living cells is one of the key processes in the maintenance of their homeostasis. Introduction of additional agents into the chain of these interactions may influence homeostatic processes. Recent advances in nanotechnologies have led to a wide use of nanoparticles (NPs) in industrial and biomedical applications. NPs are small enough to enter almost all compartments of the body, including cells and organelles, and to complicate the pattern of protein interactions. In some cases, interaction of nanoscale objects with proteins leads to hazardous consequences, such as abnormal conformational changes leading to exposure of cryptic peptide epitopes or the appearance of abnormal functions caused by structural modifications. In addition, the high local protein concentration resulting from protein adsorption on NPs may provoke avidity effects arising from close spatial repetition of the same protein. Finally, the interaction of NPs with proteins is known to induce cooperative effects, such as promotion or inhibition of protein fibrillation or self-assembling of NPs on macromolecules serving as a template. It is obvious that better understanding of the molecular mechanisms of nano-bio interactions is crucial for further advances in all nanotechnological applications. This review summarizes recent progress in understanding the molecular mechanisms of the interactions between proteins or peptides and NPs in order to predict the structural, functional, and/or nanotoxic consequences of these interactions.
Collapse
Affiliation(s)
- Anton A Shemetov
- Laboratory of Nano-Bioengineering, Moscow Engineering Physics Institute, 31 Kashirskoe shosse, 115409 Moscow, Russian Federation
| | | | | |
Collapse
|
41
|
Synthetic osteogenic extracellular matrix formed by coated silicon dioxide nanosprings. J Nanobiotechnology 2012; 10:6. [PMID: 22284364 PMCID: PMC3276422 DOI: 10.1186/1477-3155-10-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 01/27/2012] [Indexed: 11/10/2022] Open
Abstract
Background The design of biomimetic materials that parallel the morphology and biology of extracellular matrixes is key to the ability to grow functional tissues in vitro and to enhance the integration of biomaterial implants into existing tissues in vivo. Special attention has been put into mimicking the nanostructures of the extracellular matrix of bone, as there is a need to find biomaterials that can enhance the bonding between orthopedic devices and this tissue. Methods We have tested the ability of normal human osteoblasts to propagate and differentiate on silicon dioxide nanosprings, which can be easily grown on practically any surface. In addition, we tested different metals and metal alloys as coats for the nanosprings in tissue culture experiments with bone cells. Results Normal human osteoblasts grown on coated nanosprings exhibited an enhanced rate of propagation, differentiation into bone forming cells and mineralization. While osteoblasts did not attach effectively to bare nanowires grown on glass, these cells propagated successfully on nanosprings coated with titanium oxide and gold. We observed a 270 fold increase in the division rate of osteoblasts when grow on titanium/gold coated nanosprings. This effect was shown to be dependent on the nanosprings, as the coating by themselves did not alter the growth rate of osteoblast. We also observed that titanium/zinc/gold coated nanosprings increased the levels of osteoblast production of alkaline phosphatase seven folds. This result indicates that osteoblasts grown on this metal alloy coated nanosprings are differentiating to mature bone making cells. Consistent with this hypothesis, we showed that osteoblasts grown on the same metal alloy coated nanosprings have an enhanced ability to deposit calcium salt. Conclusion We have established that metal/metal alloy coated silicon dioxide nanosprings can be used as a biomimetic material paralleling the morphology and biology of osteogenic extracellular matrix. The coated nanosprings enhance normal human osteoblasts cellular behaviors needed for improving osseointegration of orthopedic materials. Thus, metal-coated nanosprings represent a novel biomaterial that could be exploited for improving success rates of orthopedic implant procedures.
Collapse
|
42
|
Yu J, Becker ML, Carri GA. The influence of amino acid sequence and functionality on the binding process of peptides onto gold surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:1408-1417. [PMID: 22148960 DOI: 10.1021/la204109r] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present a molecular dynamics study of the binding process of peptide A3 (AYSSGAPPMPPF) and other similar peptides onto gold surfaces, and identify the functions of many amino acids. Our results provide a clear picture of the separate regimes present in the binding process: diffusion, anchoring, crawling and binding. Moreover, we explored the roles of individual residues. We found that tyrosine, methionine, and phenylalanine are strong binding residues; serine serves as an effective anchoring residue; proline acts as a dynamic anchoring point, while glycine and alanine give flexibility to the peptide backbone. We then show that our findings apply to unrelated phage-derived sequences that have been reported recently to facilitate AuNP synthesis. This new knowledge may aid in the design of new peptides for the synthesis of gold nanostructures with novel morphologies.
Collapse
Affiliation(s)
- Jing Yu
- Department of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, USA
| | | | | |
Collapse
|