1
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Colombo RP, Nascimento SQ, Crespilho FN. Conductance Channels in a Single-Entity Enzyme. J Phys Chem Lett 2024; 15:10795-10801. [PMID: 39432824 PMCID: PMC11533225 DOI: 10.1021/acs.jpclett.4c01796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 09/10/2024] [Accepted: 10/16/2024] [Indexed: 10/23/2024]
Abstract
For a long time, the prevailing view in the scientific community was that proteins, being complex macromolecules composed of amino acid chains linked by peptide bonds, adopt folded structure with insulating or semiconducting properties, with high bandgaps. However, recent discoveries of unexpectedly high conductance levels, reaching values in the range of dozens of nanosiemens (nS) in proteins, have challenged this conventional understanding. In this study, we used scanning tunneling microscopy (STM) to explore the single-entity conductance properties of enzymatic channels, focusing on bilirubin oxidase (BOD) as a model metalloprotein. By immobilizing BOD on a conductive carbon surface, we discern its preferred orientation, facilitating the formation of electronic and ionic channels. These channels show efficient electron transport (ETp), with apparent conductance up to the 15 nS range. Notably, these conductance pathways are localized, minimizing electron transport barriers due to solvents and ions, underscoring BOD's redox versatility. Furthermore, electron transfer (ET) within the BOD occurs via preferential pathways. The alignment of the conductance channels with hydrophilicity maps, molecular vacancies, and regions accessible to electrolytes explains the observed conductance values. Additionally, BOD exhibits redox activity, with its active center playing a critical role in the ETp process. These findings significantly advance our understanding of the intricate mechanisms that govern ETp processes in proteins, offering new insights into the conductance of metalloproteins.
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Affiliation(s)
| | - Steffane Q. Nascimento
- 1 São Carlos Institute
of Chemistry, University of São Paulo
(USP), São Carlos, SP 13566-590, Brazil
| | - Frank Nelson Crespilho
- 1 São Carlos Institute
of Chemistry, University of São Paulo
(USP), São Carlos, SP 13566-590, Brazil
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2
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Spallacci C, Görlin M, Kumar A, D'Amario L, Cheah MH. Fabricating high-purity graphite disk electrodes as a cost-effective alternative in fundamental electrochemistry research. Sci Rep 2024; 14:4258. [PMID: 38383697 PMCID: PMC10881485 DOI: 10.1038/s41598-024-54654-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/15/2024] [Indexed: 02/23/2024] Open
Abstract
Graphite electrodes offer remarkable electrochemical properties, emerging as a viable alternative to glassy carbon (GCE) and other carbon-based electrodes for fundamental electrochemistry research. We report the fabrication and characterization of high-purity graphite disk electrodes (GDEs), made from cost-effective materials and a solvent-free methodology employing readily available laboratory equipment. Analysis of their physical properties via SEM, EDX and XPS reveals no metallic interferences and a notably high porosity, emphasizing their potential. The electrochemical performances of GDEs were found to be comparable to those of GCE. Immobilization of peptides and enzymes, both via covalent coupling and surface adsorption, was used to explore potential applications of GDEs in bioelectrochemistry. Enzyme activity could be addressed both via direct electron transfer and mediated electron transfer mechanism. These results highlight the interesting properties of our GDEs and make them a low-cost alternative to other carbon-based electrodes, with potential for future real-world applications.
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Affiliation(s)
- Claudia Spallacci
- Molecular Biomimetics, Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden.
| | - Mikaela Görlin
- Structural Chemistry, Department of Chemistry - Ångström Laboratory, Uppsala University, 75121, Uppsala, Sweden
| | - Amol Kumar
- Synthetic Molecular Chemistry, Department of Chemistry - Ångström Laboratory, Uppsala University, 75120, Uppsala, Sweden
| | - Luca D'Amario
- Molecular Biomimetics, Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden
| | - Mun Hon Cheah
- Molecular Biomimetics, Department of Chemistry - Ångström Laboratory, Uppsala University, Box 523, 75120, Uppsala, Sweden.
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3
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Aldinio-Colbachini A, Fasano A, Guendon C, Jacq-Bailly A, Wozniak J, Baffert C, Kpebe A, Léger C, Brugna M, Fourmond V. Transport limited adsorption experiments give a new lower estimate of the turnover frequency of Escherichia coli hydrogenase 1. BBA ADVANCES 2023; 3:100090. [PMID: 37168047 PMCID: PMC10165420 DOI: 10.1016/j.bbadva.2023.100090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 04/07/2023] [Accepted: 04/18/2023] [Indexed: 05/13/2023] Open
Abstract
Protein Film Electrochemistry is a technique in which a redox enzyme is directly wired to an electrode, which substitutes for the natural redox partner. In this technique, the electrical current flowing through the electrode is proportional to the catalytic activity of the enzyme. However, in most cases, the amount of enzyme molecules contributing to the current is unknown and the absolute turnover frequency cannot be determined. Here, we observe the formation of electrocatalytically active films of E. coli hydrogenase 1 by rotating an electrode in a sub-nanomolar solution of enzyme. This process is slow, and we show that it is mass-transport limited. Measuring the rate of the immobilization allows the determination of an estimation of the turnover rate of the enzyme, which appears to be much greater than that deduced from solution assays under the same conditions.
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Affiliation(s)
- Anna Aldinio-Colbachini
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Andrea Fasano
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Chloé Guendon
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Aurore Jacq-Bailly
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Jérémy Wozniak
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Carole Baffert
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Arlette Kpebe
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Christophe Léger
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Myriam Brugna
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
| | - Vincent Fourmond
- CNRS, Aix Marseille Université, BIP, IMM, IM2B 31 Chemin J. Aiguier, 13009 Marseille, France
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4
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Man HM, Mazurenko I, Le Guenno H, Bouffier L, Lojou E, de Poulpiquet A. Local pH Modulation during Electro-Enzymatic O 2 Reduction: Characterization of the Influence of Ionic Strength by In Situ Fluorescence Microscopy. Anal Chem 2022; 94:15604-15612. [DOI: 10.1021/acs.analchem.2c02135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiu Mun Man
- Laboratory of Bioenergetics and Protein Engineering, Mediterranean Institute of Microbiology, Aix-Marseille Univ., CNRS, UMR, 7281Marseille, France
| | - Ievgen Mazurenko
- Laboratory of Bioenergetics and Protein Engineering, Mediterranean Institute of Microbiology, Aix-Marseille Univ., CNRS, UMR, 7281Marseille, France
| | - Hugo Le Guenno
- Mediterranean Institute of Microbiology, CNRS, Microscopy Facility, FR 3479Marseille, France
| | - Laurent Bouffier
- Institute of Molecular Sciences, Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5255, F-33400Talence, France
| | - Elisabeth Lojou
- Laboratory of Bioenergetics and Protein Engineering, Mediterranean Institute of Microbiology, Aix-Marseille Univ., CNRS, UMR, 7281Marseille, France
| | - Anne de Poulpiquet
- Laboratory of Bioenergetics and Protein Engineering, Mediterranean Institute of Microbiology, Aix-Marseille Univ., CNRS, UMR, 7281Marseille, France
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5
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Badiani VM, Cobb SJ, Wagner A, Oliveira AR, Zacarias S, Pereira IAC, Reisner E. Elucidating Film Loss and the Role of Hydrogen Bonding of Adsorbed Redox Enzymes by Electrochemical Quartz Crystal Microbalance Analysis. ACS Catal 2022; 12:1886-1897. [PMID: 35573129 PMCID: PMC9097293 DOI: 10.1021/acscatal.1c04317] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 12/13/2021] [Indexed: 12/17/2022]
Abstract
![]()
The immobilization of redox enzymes
on electrodes enables the efficient
and selective electrocatalysis of useful reactions such as the reversible
interconversion of dihydrogen (H2) to protons (H+) and formate to carbon dioxide (CO2) with hydrogenase
(H2ase) and formate dehydrogenase (FDH), respectively.
However, their immobilization on electrodes to produce electroactive
protein films for direct electron transfer (DET) at the protein–electrode
interface is not well understood, and the reasons for their activity
loss remain vague, limiting their performance often to hour timescales.
Here, we report the immobilization of [NiFeSe]-H2ase and
[W]-FDH from Desulfovibrio vulgaris Hildenborough on a range of charged and neutral self-assembled monolayer
(SAM)-modified gold electrodes with varying hydrogen bond (H-bond)
donor capabilities. The key factors dominating the activity and stability
of the immobilized enzymes are determined using protein film voltammetry
(PFV), chronoamperometry (CA), and electrochemical quartz crystal
microbalance (E-QCM) analysis. Electrostatic and H-bonding interactions
are resolved, with electrostatic interactions responsible for enzyme
orientation while enzyme desorption is strongly limited when H-bonding
is present at the enzyme–electrode interface. Conversely, enzyme
stability is drastically reduced in the absence of H-bonding, and
desorptive enzyme loss is confirmed as the main reason for activity
decay by E-QCM during CA. This study provides insights into the possible
reasons for the reduced activity of immobilized redox enzymes and
the role of film loss, particularly H-bonding, in stabilizing bioelectrode
performance, promoting avenues for future improvements in bioelectrocatalysis.
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Affiliation(s)
- Vivek M. Badiani
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, U.K
| | - Samuel J. Cobb
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Andreas Wagner
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Ana Rita Oliveira
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB NOVA), Universidade NOVA de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Sónia Zacarias
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB NOVA), Universidade NOVA de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Inês A. C. Pereira
- Instituto de Tecnologia Química e Biológica António Xavier (ITQB NOVA), Universidade NOVA de Lisboa, Av. da República, 2780-157 Oeiras, Portugal
| | - Erwin Reisner
- Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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6
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Haque SU, Duteanu N, Ciocan S, Nasar A. A review: Evolution of enzymatic biofuel cells. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 298:113483. [PMID: 34391107 DOI: 10.1016/j.jenvman.2021.113483] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/04/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
Ever-growing demands for energy, the unsustainability of fossil fuel due to its scarcity and massive impact on global economies and the environment, have encouraged the research on alternative power sources to work upon for the governments, companies, and scientists across the world. Enzymatic biofuel cells (eBFCs) is one category of fuel cell that can harvest energy from biological moieties and has the future to be used as an alternative source of energy. The aim of this review is to summarize the background and state-of-the-art in the field of eBFCs. This review article will be very beneficial for a wide audience including students and new researchers in the field. A part of the paper summarized the challenges in the preparation of anode and cathode and the involvement of nanomaterials and conducting polymers to construct the effective bioelectrodes. It will provide an insight for the researchers working in this challenging field. Furthermore, various applications of eBFCs in implantable power devices, tiny electronic gadgets, and self powered biosensors are reported. This review article explains the development in the area of eBFCs for several years from its origin to growth systematically. It reveals the strategies that have been taken for the improvements required for the better electrochemical performance and operational stability of eBFCs. It also mentions the challenges in this field that will require proper attention so that the eBFCs can be utilized commercially in the future. The review article is written and structurized in a way so that it can provide a decent background of eBFCs to its reader. It will definitely help in enhancing the interest of reader in eBFCs.
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Affiliation(s)
- Sufia Ul Haque
- Advanced Functional Materials Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, 202002, India.
| | - Narcis Duteanu
- Faculty of Industrial Chemistry and Environmental Engineering, University of Politehnica, Timisoara, Romania.
| | - Stefania Ciocan
- Faculty of Industrial Chemistry and Environmental Engineering, University of Politehnica, Timisoara, Romania.
| | - Abu Nasar
- Advanced Functional Materials Laboratory, Department of Applied Chemistry, Faculty of Engineering and Technology, Aligarh Muslim University, Aligarh, 202002, India.
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7
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Serleti A, Xiao X, Shortall K, Magner E. Use of Self‐Assembled Monolayers for the Sequential and Independent Immobilisation of Enzymes. ChemElectroChem 2021. [DOI: 10.1002/celc.202101145] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Alessandro Serleti
- Department of Chemical Sciences Bernal Institute University of Limerick Limerick Ireland
| | - Xinxin Xiao
- Department of Chemistry Technical University of Denmark Kongens Lyngby 2800 Denmark
| | - Kim Shortall
- Department of Chemical Sciences Bernal Institute University of Limerick Limerick Ireland
| | - Edmond Magner
- Department of Chemical Sciences Synthesis and Solid State Pharmaceutical Research Centre Bernal Institute MS1016, University of Limerick Limerick Ireland
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8
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Yan X, Ma S, Tang J, Tanner D, Ulstrup J, Xiao X, Zhang J. Direct electron transfer of fructose dehydrogenase immobilized on thiol-gold electrodes. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138946] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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Abstract
Bioelectrocatalysis using redox enzymes appears as a sustainable way for biosensing, electricity production, or biosynthesis of fine products. Despite advances in the knowledge of parameters that drive the efficiency of enzymatic electrocatalysis, the weak stability of bioelectrodes prevents large scale development of bioelectrocatalysis. In this review, starting from the understanding of the parameters that drive protein instability, we will discuss the main strategies available to improve all enzyme stability, including use of chemicals, protein engineering and immobilization. Considering in a second step the additional requirements for use of redox enzymes, we will evaluate how far these general strategies can be applied to bioelectrocatalysis.
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10
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Direct Electrochemical Enzyme Electron Transfer on Electrodes Modified by Self-Assembled Molecular Monolayers. Catalysts 2020. [DOI: 10.3390/catal10121458] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Self-assembled molecular monolayers (SAMs) have long been recognized as crucial “bridges” between redox enzymes and solid electrode surfaces, on which the enzymes undergo direct electron transfer (DET)—for example, in enzymatic biofuel cells (EBFCs) and biosensors. SAMs possess a wide range of terminal groups that enable productive enzyme adsorption and fine-tuning in favorable orientations on the electrode. The tunneling distance and SAM chain length, and the contacting terminal SAM groups, are the most significant controlling factors in DET-type bioelectrocatalysis. In particular, SAM-modified nanostructured electrode materials have recently been extensively explored to improve the catalytic activity and stability of redox proteins immobilized on electrochemical surfaces. In this report, we present an overview of recent investigations of electrochemical enzyme DET processes on SAMs with a focus on single-crystal and nanoporous gold electrodes. Specifically, we consider the preparation and characterization methods of SAMs, as well as SAM applications in promoting interfacial electrochemical electron transfer of redox proteins and enzymes. The strategic selection of SAMs to accord with the properties of the core redox protein/enzymes is also highlighted.
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11
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Tang J, Yan X, Huang W, Engelbrekt C, Duus JØ, Ulstrup J, Xiao X, Zhang J. Bilirubin oxidase oriented on novel type three-dimensional biocathodes with reduced graphene aggregation for biocathode. Biosens Bioelectron 2020; 167:112500. [PMID: 32829175 DOI: 10.1016/j.bios.2020.112500] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/04/2020] [Accepted: 08/04/2020] [Indexed: 11/29/2022]
Abstract
Aggregation of reduced graphene oxide (RGO) due to π-π stacking is a recurrent problem in graphene-based electrochemistry, decreasing the effective working area and therefore the performance of the RGO electrodes. Dispersing RGO on three-dimensional (3D) carbon paper electrodes is one strategy towards overcoming this challenge, with partial relief aggregation. In this report, we describe the grafting of negatively charged 4-aminobenzoic acid (4-ABA) onto a graphene functionalized carbon paper electrode surface. 4-ABA functionalization induces separation of the RGO layers, at the same time leading to favorable orientation of the blue multi-copper enzyme Myrothecium verrucaria bilirubin oxidase (MvBOD) for direct electron transfer (DET) in the dioxygen reduction reaction (ORR) at neutral pH. Simultaneous electroreduction of graphene oxide to RGO and covalent attachment of 4-ABA are achieved by applying alternating cathodic and anodic electrochemical potential pulses, leading to a high catalytic current density (Δjcat:193 ± 4 μA cm-2) under static conditions. Electrochemically grafted 4-ABA not only leads to a favorable orientation of BOD as validated by fitting a kinetic model to the electrocatalytic data, but also acts to alleviate RGO aggregation as disclosed by scanning electron microscopy, most likely due to the electrostatic repulsion between 4-ABA-grafted graphene layers. With a half-lifetime of 55 h, the bioelectrode also shows the highest operational stability for DET-type MvBOD-based bioelectrodes reported to date. The bioelectrode was finally shown to work well as a biocathode of a membrane-less glucose/O2 enzymatic biofuel cell with a maximum power density of 22 μW cm-2 and an open circuit voltage of 0.51 V.
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Affiliation(s)
- Jing Tang
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Xiaomei Yan
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Wei Huang
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Christian Engelbrekt
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Jens Øllgaard Duus
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Jens Ulstrup
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark; Kazan National Research Technological University, K. Marx Str., 68, 420015, Kazan, Republic of Tatarstan, Russia
| | - Xinxin Xiao
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark.
| | - Jingdong Zhang
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark.
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12
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Zheng H, Yang SJ, Zheng YC, Cui Y, Zhang Z, Zhong JY, Zhou J. Electrostatic Effect of Functional Surfaces on the Activity of Adsorbed Enzymes: Simulations and Experiments. ACS APPLIED MATERIALS & INTERFACES 2020; 12:35676-35687. [PMID: 32649833 DOI: 10.1021/acsami.0c08080] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The efficient immobilization of haloalkane dehalogenase (DhaA) on carriers with retaining of its catalytic activity is essential for its application in environmental remediation. In this work, adsorption orientation and conformation of DhaA on different functional surfaces were investigated by computer simulations; meanwhile, the mechanism of varying the catalytic activity was also probed. The corresponding experiments were then carried out to verify the simulation results. (The simulations of DhaA on SAMs provided parallel insights into DhaA adsorption in carriers. Then, the theory-guided experiments were carried out to screen the best surface functional groups for DhaA immobilization.) The electrostatic interaction was considered as the main impact factor for the regulation of enzyme orientation, conformation, and enzyme bioactivity during DhaA adsorption. The synergy of overall conformation, enzyme substrate tunnel structural parameters, and distance between catalytic active sites and surfaces codetermined the catalytic activity of DhaA. Specifically, it was found that the positively charged surface with suitable surface charge density was helpful for the adsorption of DhaA and retaining its conformation and catalytic activity and was favorable for higher enzymatic catalysis efficiency in haloalkane decomposition and environmental remediation. The neutral, negatively charged surfaces and positively charged surfaces with high surface charge density always caused relatively larger DhaA conformation change and decreased catalytic activity. This study develops a strategy using a combination of simulation and experiment, which can be essential for guiding the rational design of the functionalization of carriers for enzyme adsorption, and provides a practical tool to rationally screen functional groups for the optimization of adsorbed enzyme functions on carriers. More importantly, the strategy is general and can be applied to control behaviors of different enzymes on functional carrier materials.
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Affiliation(s)
- He Zheng
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China
| | - Sheng-Jiang Yang
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Yong-Chao Zheng
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China
| | - Yan Cui
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China
| | - Zhe Zhang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China
| | - Jin-Yi Zhong
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, P. R. China
| | - Jian Zhou
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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13
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Hitaishi VP, Mazurenko I, Vengasseril Murali A, de Poulpiquet A, Coustillier G, Delaporte P, Lojou E. Nanosecond Laser-Fabricated Monolayer of Gold Nanoparticles on ITO for Bioelectrocatalysis. Front Chem 2020; 8:431. [PMID: 32582633 PMCID: PMC7287402 DOI: 10.3389/fchem.2020.00431] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Accepted: 04/24/2020] [Indexed: 11/13/2022] Open
Abstract
Redox enzymes can be envisioned as biocatalysts in various electrocatalytic-based devices. Among factors that play roles in bioelectrochemistry limitations, the effect of enzyme-enzyme neighboring interaction on electrocatalysis has rarely been investigated, although critical in vivo. We report in this work an in-depth study of gold nanoparticles prepared by laser ablation in the ultimate goal of determining the relationship between activity and enzyme density on electrodes. Nanosecond laser interaction with nanometric gold films deposited on indium tin oxide support was used to generate in situ gold nanoparticles (AuNPs) free from any stabilizers. A comprehensive analysis of AuNP size and coverage, as well as total geometric surface vs. electroactive surface is provided as a function of the thickness of the treated gold layer. Using microscopy and electrochemistry, the long-term stability of AuNP-based electrodes in the atmosphere and in the electrolyte is demonstrated. AuNPs formed by laser treatment are then modified by thiol chemistry and their electrochemical behavior is tested with a redox probe. Finally, enzyme adsorption and bioelectrocatalysis are evaluated in the case of two enzymes, i.e., the Myrothecium verrucaria bilirubin oxidase and the Thermus thermophilus laccase. Behaving differently on charged surfaces, they allow demonstrating the validity of laser treated AuNPs for bioelectrocatalysis.
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Affiliation(s)
- Vivek Pratap Hitaishi
- Aix Marseille Univ, CNRS, BIP, Bioénergétique et Ingénierie des Protéines, UMR 7281, Marseille, France
| | - Ievgen Mazurenko
- Aix Marseille Univ, CNRS, BIP, Bioénergétique et Ingénierie des Protéines, UMR 7281, Marseille, France
| | - Anjali Vengasseril Murali
- Aix Marseille Univ, CNRS, LP3, UMR 7341, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Anne de Poulpiquet
- Aix Marseille Univ, CNRS, BIP, Bioénergétique et Ingénierie des Protéines, UMR 7281, Marseille, France
| | - Gaëlle Coustillier
- Aix Marseille Univ, CNRS, LP3, UMR 7341, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Philippe Delaporte
- Aix Marseille Univ, CNRS, LP3, UMR 7341, Parc Scientifique et Technologique de Luminy, Marseille, France
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP, Bioénergétique et Ingénierie des Protéines, UMR 7281, Marseille, France
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14
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Tassy B, Dauphin AL, Man HM, Le Guenno H, Lojou E, Bouffier L, de Poulpiquet A. In Situ Fluorescence Tomography Enables a 3D Mapping of Enzymatic O 2 Reduction at the Electrochemical Interface. Anal Chem 2020; 92:7249-7256. [PMID: 32298094 DOI: 10.1021/acs.analchem.0c00844] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Getting information about the fate of immobilized enzymes and the evolution of their environment during turnover is a mandatory step toward bioelectrode optimization for effective use in biodevices. We demonstrate here the proof-of-principle visual characterization of the reactivity at an enzymatic electrode thanks to fluorescence confocal laser scanning microscopy (FCLSM) implemented in situ during the electrochemical experiment. The enzymatic O2 reduction involves proton-coupled electron transfers. Therefore, fluorescence variation of a pH-dependent fluorescent dye in the electrode vicinity enables reaction visualization. Simultaneous collection of electrochemical and fluorescence signals gives valuable space- and time-resolved information. Once the technical challenges of such a coupling are overcome, in situ FCLSM affords a unique way to explore reactivity at the electrode surface and in the electrolyte volume. Unexpected features are observed, especially the pH evolution of the enzyme environment, which is also indicated by a characteristic concentration profile within the diffusion layer. This coupled approach also gives access to a cartography of the electrode surface response (i.e., heterogeneity), which cannot be obtained solely by an electrochemical means.
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Affiliation(s)
- Bastien Tassy
- Aix-Marseille Univ., CNRS, UMR 7281, Bioenergetics and Protein Engineering, 13402 Marseille, France
| | - Alice L Dauphin
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5255, Institute of Molecular Sciences, F-33400 Talence, France
| | - Hiu Mun Man
- Aix-Marseille Univ., CNRS, UMR 7281, Bioenergetics and Protein Engineering, 13402 Marseille, France
| | - Hugo Le Guenno
- Microscopy Facility, CNRS, FR 3479, Mediterranean Institute of Microbiology, 13402 Marseille, France
| | - Elisabeth Lojou
- Aix-Marseille Univ., CNRS, UMR 7281, Bioenergetics and Protein Engineering, 13402 Marseille, France
| | - Laurent Bouffier
- Univ. Bordeaux, CNRS, Bordeaux INP, UMR 5255, Institute of Molecular Sciences, F-33400 Talence, France
| | - Anne de Poulpiquet
- Aix-Marseille Univ., CNRS, UMR 7281, Bioenergetics and Protein Engineering, 13402 Marseille, France
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15
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Yang S, Liu J, Zheng H, Zhong J, Zhou J. Simulated revelation of the adsorption behaviours of acetylcholinesterase on charged self-assembled monolayers. NANOSCALE 2020; 12:3701-3714. [PMID: 32022070 DOI: 10.1039/c9nr10123c] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
An acetylcholinesterase (AChE)-based electrochemical biosensor, as a promising alternative to detect organophosphates (OPs) and carbamate pesticides, has gained considerable attention in recent years, due to the advantages of simplicity, rapidity, reliability and low cost. The bio-activity of AChE immobilized on the surface and the direct electron transfer (DET) rate between an enzyme and an electrode directly determined the analytical performances of the AChE-based biosensor, and experimental studies have shown that the charged surfaces have a strong impact on the detectability of the AChE-based biosensor. Therefore, it is very important to reveal the behaviour of AChE in bulk solution and on charged surfaces at the molecular level. In this work, the adsorption orientation and conformation of AChE from Torpedo californica (TcAChE) on oppositely charged self-assembled monolayers (SAMs), COOH-SAM and NH2-SAM with different surface charge densities, were investigated by parallel tempering Monte Carlo (PTMC) and all-atom molecular dynamics simulations (AAMD). Simulation results show that TcAChE could spontaneously and stably adsorb on two oppositely charged surfaces by the synergy of an electric dipole and charged residue patch, and opposite orientations were observed. The active-site gorge of TcAChE is oriented toward the surface with the "end-on" orientation and the active sites are close to the surface when it is adsorbed on the positively charged surface and the tunnel cost for the substrate is lower than that on the negatively charged surface and in bulk solution, while for TcAChE adsorbed on the negatively charged surface, the active site of TcAChE is far away from the surface and the active-site gorge is oriented toward the solution with a "back-on" orientation. It suggests that the positively charged surface could provide a better microenvironment for the efficient bio-catalytic reaction and quick DET between TcAChE and the electrode surface. Moreover, the RMSD, RMSF, dipole moment, gyration radius, eccentricity and superimposed structures show that only a slight conformational change occurred on the relatively flexible structure of TcAChE during simulations, and the native conformation is well preserved after adsorption. This work helps us better comprehend the adsorption mechanism of TcAChE on charged surfaces and might provide some guidelines for the development of new TcAChE-based amperometric biosensors for the detection of organophosphorus pesticides.
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Affiliation(s)
- Shengjiang Yang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China.
| | - Jie Liu
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430073, P. R. China
| | - He Zheng
- State Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, Academy of Military Science, Beijing 102205, P. R. China
| | - Jinyi Zhong
- State Key Laboratory of NBC Protection for Civilian, Research Institute of Chemical Defense, Academy of Military Science, Beijing 102205, P. R. China
| | - Jian Zhou
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, P. R. China.
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16
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Zigah D, Lojou E, Poulpiquet A. Micro‐ and Nanoscopic Imaging of Enzymatic Electrodes: A Review. ChemElectroChem 2019. [DOI: 10.1002/celc.201901065] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Dodzi Zigah
- Univ. Bordeaux, CNRSBordeaux INP ISM UMR 5255 33400 Talence France
| | - Elisabeth Lojou
- Aix-Marseille Univ., CNRSBIP, UMR 7281 31 Chemin Aiguier 13009 Marseille France
| | - Anne Poulpiquet
- Aix-Marseille Univ., CNRSBIP, UMR 7281 31 Chemin Aiguier 13009 Marseille France
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17
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Rewatkar P, Hitaishi VP, Lojou E, Goel S. Enzymatic fuel cells in a microfluidic environment: Status and opportunities. A mini review. Electrochem commun 2019. [DOI: 10.1016/j.elecom.2019.106533] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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18
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Xiao X, Xia HQ, Wu R, Bai L, Yan L, Magner E, Cosnier S, Lojou E, Zhu Z, Liu A. Tackling the Challenges of Enzymatic (Bio)Fuel Cells. Chem Rev 2019; 119:9509-9558. [PMID: 31243999 DOI: 10.1021/acs.chemrev.9b00115] [Citation(s) in RCA: 185] [Impact Index Per Article: 37.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The ever-increasing demands for clean and sustainable energy sources combined with rapid advances in biointegrated portable or implantable electronic devices have stimulated intensive research activities in enzymatic (bio)fuel cells (EFCs). The use of renewable biocatalysts, the utilization of abundant green, safe, and high energy density fuels, together with the capability of working at modest and biocompatible conditions make EFCs promising as next generation alternative power sources. However, the main challenges (low energy density, relatively low power density, poor operational stability, and limited voltage output) hinder future applications of EFCs. This review aims at exploring the underlying mechanism of EFCs and providing possible practical strategies, methodologies and insights to tackle these issues. First, this review summarizes approaches in achieving high energy densities in EFCs, particularly, employing enzyme cascades for the deep/complete oxidation of fuels. Second, strategies for increasing power densities in EFCs, including increasing enzyme activities, facilitating electron transfers, employing nanomaterials, and designing more efficient enzyme-electrode interfaces, are described. The potential of EFCs/(super)capacitor combination is discussed. Third, the review evaluates a range of strategies for improving the stability of EFCs, including the use of different enzyme immobilization approaches, tuning enzyme properties, designing protective matrixes, and using microbial surface displaying enzymes. Fourth, approaches for the improvement of the cell voltage of EFCs are highlighted. Finally, future developments and a prospective on EFCs are envisioned.
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Affiliation(s)
- Xinxin Xiao
- Institute for Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China.,Department of Chemical Sciences and Bernal Institute , University of Limerick , Limerick V94 T9PX , Ireland
| | - Hong-Qi Xia
- Institute for Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
| | - Ranran Wu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences , 32 West seventh Road, Tianjin Airport Economic Area , Tianjin 300308 , China
| | - Lu Bai
- Institute for Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
| | - Lu Yan
- Institute for Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China
| | - Edmond Magner
- Department of Chemical Sciences and Bernal Institute , University of Limerick , Limerick V94 T9PX , Ireland
| | - Serge Cosnier
- Université Grenoble-Alpes , DCM UMR 5250, F-38000 Grenoble , France.,Département de Chimie Moléculaire , UMR CNRS, DCM UMR 5250, F-38000 Grenoble , France
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP, Bioénergétique et Ingénierie des Protéines UMR7281 , Institut de Microbiologie de la Méditerranée, IMM , FR 3479, 31, chemin Joseph Aiguier 13402 Marseille , Cedex 20 , France
| | - Zhiguang Zhu
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences , 32 West seventh Road, Tianjin Airport Economic Area , Tianjin 300308 , China
| | - Aihua Liu
- Institute for Biosensing, and College of Life Sciences , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China.,College of Chemistry & Chemical Engineering , Qingdao University , 308 Ningxia Road , Qingdao 266071 , China.,School of Pharmacy, Medical College , Qingdao University , Qingdao 266021 , China
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19
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Fies WA, Dugger JW, Dick JE, Wilder LM, Browning KL, Doucet M, Browning JF, Webb LJ. Direct Measurement of Water Permeation in Submerged Alkyl Thiol Self-Assembled Monolayers on Gold Surfaces Revealed by Neutron Reflectometry. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:5647-5662. [PMID: 30919634 DOI: 10.1021/acs.langmuir.9b00541] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Self-assembled monolayers (SAMs) of alkyl thiols are frequently used to chemically functionalize gold surfaces for applications throughout materials chemistry, electrochemistry, and biotechnology. Despite this, a detailed understanding of the structure of the SAM-water interface generated from both formation and use of the SAM in an aqueous environment is elusive, and analytical measurements of the structure and chemistry of the SAM-water interface are an ongoing experimental challenge. To address this, we used neutron reflectometry (NR) to measure water association with both hydrophobic and hydrophilic SAMs under both wet and dry conditions. SAMs used for this study were made from hydrophobic decanethiol mixed with hydrophilic 11-azido-1-undecanethiol with compositions of 0-100% of the azide-terminated thiol. All SAMs were formed by conventional solution incubation of a Au substrate immersed in ethanol. Each SAM was characterized by grazing incidence angle reflection-absorption Fourier transfer infrared spectroscopy, contact angle goniometry, and electrochemical methods to confirm it was a completely formed monolayer with evidence of extensive crystalline-like domains. NR measured significant absorption of water into each SAM, ranging from 1.6 to 5.7 water molecules per alkyl thiol, when SAMs were immersed in water. Water infiltration was independent of SAM composition and terminal group hydrophilicity. These results demonstrate that water accesses defects, fluid regions, and heterogeneous domains inherent to even well-formed SAMs.
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Affiliation(s)
- Whitney A Fies
- Department of Chemistry and Texas Materials Institute , The University of Texas at Austin , 2506 Speedway STOP A5300 , Austin , Texas 78712 , United States
| | | | - Jeffrey E Dick
- Department of Chemistry , The University of North Carolina at Chapel Hill , Chapel Hill , North Carolina 27599 , United States
| | - Logan M Wilder
- Department of Chemistry and Texas Materials Institute , The University of Texas at Austin , 2506 Speedway STOP A5300 , Austin , Texas 78712 , United States
| | | | | | | | - Lauren J Webb
- Department of Chemistry and Texas Materials Institute , The University of Texas at Austin , 2506 Speedway STOP A5300 , Austin , Texas 78712 , United States
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20
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Al-Lolage FA, Bartlett PN, Gounel S, Staigre P, Mano N. Site-Directed Immobilization of Bilirubin Oxidase for Electrocatalytic Oxygen Reduction. ACS Catal 2019. [DOI: 10.1021/acscatal.8b04340] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Firas A. Al-Lolage
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
- Department of Chemistry, College of Science, University of Mosul, Mosul 41002, Iraq
| | - Philip N. Bartlett
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | - Sébastien Gounel
- CNRS, Université Bordeaux, Centre de Recherche Paul Pascal (CRPP), UMR 5031, 33600 Pessac, France
| | - Priscilla Staigre
- CNRS, Université Bordeaux, Centre de Recherche Paul Pascal (CRPP), UMR 5031, 33600 Pessac, France
| | - Nicolas Mano
- CNRS, Université Bordeaux, Centre de Recherche Paul Pascal (CRPP), UMR 5031, 33600 Pessac, France
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21
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Hitaishi VP, Mazurenko I, Harb M, Clément R, Taris M, Castano S, Duché D, Lecomte S, Ilbert M, de Poulpiquet A, Lojou E. Electrostatic-Driven Activity, Loading, Dynamics, and Stability of a Redox Enzyme on Functionalized-Gold Electrodes for Bioelectrocatalysis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03443] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Ievgen Mazurenko
- School of Biomedical Sciences, University of Leeds, LS2 9JT Leeds, United Kingdom
| | - Malek Harb
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Romain Clément
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Marion Taris
- Institute for Chemistry and Biology of Membrane and Nano-objects, Allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - Sabine Castano
- Institute for Chemistry and Biology of Membrane and Nano-objects, Allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - David Duché
- Aix Marseille Univ, CNRS, University of Toulon, IM2NP UMR 7334, 13397 Marseille, France
| | - Sophie Lecomte
- Institute for Chemistry and Biology of Membrane and Nano-objects, Allée Geoffroy St. Hilaire, 33600 Pessac, France
| | - Marianne Ilbert
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Anne de Poulpiquet
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
| | - Elisabeth Lojou
- Aix-Marseille Univ, CNRS, BIP, UMR 7281, 31 Chemin Aiguier, 13009 Marseille, France
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22
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Yang S, Liu J, Quan X, Zhou J. Bilirubin Oxidase Adsorption onto Charged Self-Assembled Monolayers: Insights from Multiscale Simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:9818-9828. [PMID: 30044918 DOI: 10.1021/acs.langmuir.8b01974] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The efficient immobilization and orientation of bilirubin oxidase (BOx) on different solid substrates are essential for its application in biotechnology. The T1 copper site within BOx is responsible for the electron transfer. In order to obtain quick direct electron transfer (DET), it is important to keep the distance between the T1 copper site and electrode surface small and to maintain the natural structure of BOx at the same time. In this work, the combined parallel tempering Monte Carlo simulation with the all-atom molecular dynamics simulation approach was adopted to reveal the adsorption mechanism, orientation, and conformational changes of BOx from Myrothecium verrucaria (MvBOx) adsorbed on charged self-assembled monolayers (SAMs), including COOH-SAM and NH2-SAM with different surface charge densities (±0.05 and ±0.19 C·m-2). The results show that MvBOx adsorbs on negatively charged surfaces with a "back-on" orientation, whereas on positively charged surfaces, MvBOx binds with a "lying-on" orientation. The locations of the T1 copper site are closer to negatively charged surfaces. Furthermore, for negatively charged surfaces, the T1 copper site prefers to orient closer to the surface with lower surface charge density. Therefore, the negatively charged surface with low surface charge density is more suitable for the DET of MvBOx on electrodes. Besides, the structural changes primarily take place on the relatively flexible turns, coils, and α-helix. The native structure of MvBOx is well preserved when it adsorbs on both charged surfaces. This work sheds light on the controlling orientation and conformational information on MvBOx on charged surfaces at the atomistic level. This understanding would certainly promote our understanding of the mechanism of MvBOx immobilization and provide theoretical support for BOx-based bioelectrode design.
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Affiliation(s)
- Shengjiang Yang
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology , Guangzhou 510640 , P. R. China
| | - Jie Liu
- Key Laboratory for Green Chemical Process of Ministry of Education, School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology , Wuhan 430073 , P. R. China
| | - Xuebo Quan
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology , Guangzhou 510640 , P. R. China
| | - Jian Zhou
- School of Chemistry and Chemical Engineering, Guangdong Provincial Key Lab for Green Chemical Product Technology, South China University of Technology , Guangzhou 510640 , P. R. China
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23
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Wang X, Roger M, Clément R, Lecomte S, Biaso F, Abriata LA, Mansuelle P, Mazurenko I, Giudici-Orticoni MT, Lojou E, Ilbert M. Electron transfer in an acidophilic bacterium: interaction between a diheme cytochrome and a cupredoxin. Chem Sci 2018; 9:4879-4891. [PMID: 29910941 PMCID: PMC5982212 DOI: 10.1039/c8sc01615a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Accepted: 04/30/2018] [Indexed: 12/15/2022] Open
Abstract
Acidithiobacillus ferrooxidans, a chemolithoautotrophic Gram-negative bacterium, has a remarkable ability to obtain energy from ferrous iron oxidation at pH 2. Several metalloproteins have been described as being involved in this respiratory chain coupling iron oxidation with oxygen reduction. However, their properties and physiological functions remain largely unknown, preventing a clear understanding of the global mechanism. In this work, we focus on two metalloproteins of this respiratory pathway, a diheme cytochrome c4 (Cyt c4) and a green copper protein (AcoP) of unknown function. We first demonstrate the formation of a complex between these two purified proteins, which allows homogeneous intermolecular electron-transfer in solution. We then mimic the physiological interaction between the two partners by replacing one at a time with electrodes displaying different chemical functionalities. From the electrochemical behavior of individual proteins, we show that, while electron transfer on AcoP requires weak electrostatic interaction, electron transfer on Cyt c4 tolerates different charge and hydrophobicity conditions, suggesting a pivotal role of this protein in the metabolic chain. The electrochemical study of the proteins incubated together demonstrates an intermolecular electron transfer involving the protein complex, in which AcoP is reduced through the high potential heme of Cyt c4. Modelling of the electrochemical signals at different scan rates allows us to estimate the rate constant of this intermolecular electron transfer in the range of a few s-1. Possible routes for electron transfer in the acidophilic bacterium are deduced.
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Affiliation(s)
- X Wang
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - M Roger
- School of Life Sciences , University of Dundee , Dundee , DD1 5EH , Scotland , UK
| | - R Clément
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - S Lecomte
- Institute for Chemistry and Biology of Membrane and Nano-objects , Allée Geoffroy St Hilaire , 33600 Pessac , France
| | - F Biaso
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - L A Abriata
- Laboratory for Biomolecular Modeling , École Polytechnique Fédérale de Lausanne and Swiss Institute of Bioinformatics , AAB014, Station 19 , 1015 Lausanne , Switzerland
| | - P Mansuelle
- Aix Marseille Univ , CNRS , Institut de Microbiologie de la Méditerranée , FR 3479, Plate-forme Protéomique, Marseille Protéomique (MaP), B.P. 71 , 13402 Marseille Cedex 20 , France
| | - I Mazurenko
- School of Biomedical Sciences , Leeds , LS2 9JT , UK
| | - M T Giudici-Orticoni
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - E Lojou
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
| | - M Ilbert
- Aix Marseille Univ , CNRS , IMM , BIP , UMR 7281 , 31 Chemin Aiguier , 13009 Marseille , France . ;
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24
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Abstract
Redox enzymes, which catalyze reactions involving electron transfers in living organisms, are very promising components of biotechnological devices, and can be envisioned for sensing applications as well as for energy conversion. In this context, one of the most significant challenges is to achieve efficient direct electron transfer by tunneling between enzymes and conductive surfaces. Based on various examples of bioelectrochemical studies described in the recent literature, this review discusses the issue of enzyme immobilization at planar electrode interfaces. The fundamental importance of controlling enzyme orientation, how to obtain such orientation, and how it can be verified experimentally or by modeling are the three main directions explored. Since redox enzymes are sizable proteins with anisotropic properties, achieving their functional immobilization requires a specific and controlled orientation on the electrode surface. All the factors influenced by this orientation are described, ranging from electronic conductivity to efficiency of substrate supply. The specificities of the enzymatic molecule, surface properties, and dipole moment, which in turn influence the orientation, are introduced. Various ways of ensuring functional immobilization through tuning of both the enzyme and the electrode surface are then described. Finally, the review deals with analytical techniques that have enabled characterization and quantification of successful achievement of the desired orientation. The rich contributions of electrochemistry, spectroscopy (especially infrared spectroscopy), modeling, and microscopy are featured, along with their limitations.
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25
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Poon KC, Ma X, Tan DC, Su H, Sato H. Theoretical Modeling, Facile Fabrication, and Experimental Study of Optimally Bound Bilirubin Oxidase on Palladium Nanoparticles for Enhanced Oxygen Reduction Reaction. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | | | - Haibin Su
- Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong 999077
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26
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Affiliation(s)
- Nicolas Mano
- CNRS, CRPP, UPR 8641, 33600 Pessac, France
- University of Bordeaux, CRPP, UPR 8641, 33600 Pessac, France
| | - Anne de Poulpiquet
- Aix Marseille Univ., CNRS, BIP, 31, chemin Aiguier, 13402 Marseille, France
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27
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de Poulpiquet A, Kjaergaard CH, Rouhana J, Mazurenko I, Infossi P, Gounel S, Gadiou R, Giudici-Orticoni MT, Solomon EI, Mano N, Lojou E. Mechanism of chloride inhibition of bilirubin oxidases and its dependence on potential and pH. ACS Catal 2017; 7:3916-3923. [PMID: 29930880 PMCID: PMC6007015 DOI: 10.1021/acscatal.7b01286] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Bilirubin oxidases (BODs) belong to the multi-copper oxidase (MCO) family and efficiently reduce O2 at neutral pH and in physiological conditions where chloride concentrations are over 100 mM. BODs were consequently considered to be Cl- resistant contrary to laccases. However, there has not been a detailed study on the related effect of chloride and pH on the redox state of immobilized BODs. Here, we investigate by electrochemistry the catalytic mechanism of O2 reduction by the thermostable Bacillus pumilus BOD immobilized on carbon nanofibers in the presence of NaCl. The addition of chloride results in the formation of a redox state of the enzyme, previously observed for different BODs and laccases, which is only active after a reductive step. This behavior has not been previously investigated. We show for the first time that the kinetics of formation of this state is strongly dependent on pH, temperature, Cl- concentration and on the applied redox potential. UV-visible spectroscopy allows us to correlate the inhibition process by chloride with the formation of the alternative resting form of the enzyme. We demonstrate that O2 is not required for its formation and show that the application of an oxidative potential is sufficient. In addition, our results suggest that the reactivation may proceed thought the T3 β.
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Affiliation(s)
- Anne de Poulpiquet
- Aix Marseille Univ, CNRS, BIP, 31 chemin Aiguier, 13402 Marseille, France
| | | | - Jad Rouhana
- CNRS, CRPP, UPR 8641, 33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, 33600 Pessac, France
| | - Ievgen Mazurenko
- Aix Marseille Univ, CNRS, BIP, 31 chemin Aiguier, 13402 Marseille, France
| | - Pascale Infossi
- Aix Marseille Univ, CNRS, BIP, 31 chemin Aiguier, 13402 Marseille, France
| | - Sébastien Gounel
- CNRS, CRPP, UPR 8641, 33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, 33600 Pessac, France
| | - Roger Gadiou
- Institut des Sciences de Matériaux de Mulhouse, CNRS, 15 rue Starcky, 68057 Mulhouse, France
| | | | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Nicolas Mano
- CNRS, CRPP, UPR 8641, 33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, 33600 Pessac, France
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP, 31 chemin Aiguier, 13402 Marseille, France
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28
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Milton RD, Minteer SD. Direct enzymatic bioelectrocatalysis: differentiating between myth and reality. J R Soc Interface 2017; 14:20170253. [PMID: 28637918 PMCID: PMC5493807 DOI: 10.1098/rsif.2017.0253] [Citation(s) in RCA: 98] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Accepted: 05/30/2017] [Indexed: 02/03/2023] Open
Abstract
Enzymatic bioelectrocatalysis is being increasingly exploited to better understand oxidoreductase enzymes, to develop minimalistic yet specific biosensor platforms, and to develop alternative energy conversion devices and bioelectrosynthetic devices for the production of energy and/or important chemical commodities. In some cases, these enzymes are able to electronically communicate with an appropriately designed electrode surface without the requirement of an electron mediator to shuttle electrons between the enzyme and electrode. This phenomenon has been termed direct electron transfer or direct bioelectrocatalysis. While many thorough studies have extensively investigated this fascinating feat, it is sometimes difficult to differentiate desirable enzymatic bioelectrocatalysis from electrocatalysis deriving from inactivated enzyme that may have also released its catalytic cofactor. This article will review direct bioelectrocatalysis of several oxidoreductases, with an emphasis on experiments that provide support for direct bioelectrocatalysis versus denatured enzyme or dissociated cofactor. Finally, this review will conclude with a series of proposed control experiments that could be adopted to discern successful direct electronic communication of an enzyme from its denatured counterpart.
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Affiliation(s)
- Ross D Milton
- Department of Chemistry, University of Utah, 315 S 1400 E, Room 2020, Salt Lake City, UT 84112, USA
| | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 S 1400 E, Room 2020, Salt Lake City, UT 84112, USA
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29
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Gross AJ, Chen X, Giroud F, Abreu C, Le Goff A, Holzinger M, Cosnier S. A High Power Buckypaper Biofuel Cell: Exploiting 1,10-Phenanthroline-5,6-dione with FAD-Dependent Dehydrogenase for Catalytically-Powerful Glucose Oxidation. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00738] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andrew. J. Gross
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
| | - Xiaohong Chen
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
| | - Fabien Giroud
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
| | - Caroline Abreu
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
| | - Alan Le Goff
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
| | - Michael Holzinger
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
| | - Serge Cosnier
- Department of Molecular
Chemistry,
UMR CNRS-UGA 5250, Université Grenoble Alpes, 38000 Grenoble, France
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30
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Stines-Chaumeil C, Roussarie E, Mano N. The nature of the rate-limiting step of blue multicopper oxidases: Homogeneous studies versus heterogeneous. BIOCHIMIE OPEN 2017; 4:36-40. [PMID: 29450139 PMCID: PMC5801829 DOI: 10.1016/j.biopen.2017.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 01/21/2017] [Indexed: 11/15/2022]
Abstract
Multicopper oxidases (MCOs) catalyzed two half reactions (linked by an intramolecular electron transfer) through a Ping-Pong mechanism: the substrate oxidation followed by the O2 reduction. MCOs have been characterized in details in solution or immobilized on electrode surfaces. The nature of the rate-limiting steps, which is controversial in the literature, is discussed in this mini review for both cases. Deciphering such rate-limiting steps is of particular importance to efficiently use MCOs in any applications requiring the reduction of O2 to water. Limiting rate constant of multicopper oxidase in solution is discussed. Limiting rate constant of immobilized multicopper oxidase is discussed. Homogeneous and heterogeneous enzyme kinetics are compared.
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Affiliation(s)
- Claire Stines-Chaumeil
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France.,Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Elodie Roussarie
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France.,Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Nicolas Mano
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France.,Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
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31
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Monsalve K, Mazurenko I, Gutierrez-Sanchez C, Ilbert M, Infossi P, Frielingsdorf S, Giudici-Orticoni MT, Lenz O, Lojou E. Impact of Carbon Nanotube Surface Chemistry on Hydrogen Oxidation by Membrane-Bound Oxygen-Tolerant Hydrogenases. ChemElectroChem 2016. [DOI: 10.1002/celc.201600460] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Karen Monsalve
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | - Ievgen Mazurenko
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | | | - Marianne Ilbert
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | - Pascale Infossi
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
| | - Stefan Frielingsdorf
- Institute für Chemie, Sekretariat PC14; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | | | - Oliver Lenz
- Institute für Chemie, Sekretariat PC14; Technische Universität Berlin; Straße des 17. Juni 135 10623 Berlin Germany
| | - Elisabeth Lojou
- Aix Marseille Univ, CNRS, BIP, UMR 7281; 31 chemin Joseph Aiguier 13402 Marseille France
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