1
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Contaldo U, Padrosa DR, Jamet H, Albrecht M, Paradisi F, Le Goff A. Optimising Electrical Interfacing between the Trimeric Copper Nitrite Reductase and Carbon Nanotubes. Chemistry 2023; 29:e202301351. [PMID: 37310888 DOI: 10.1002/chem.202301351] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/09/2023] [Accepted: 06/13/2023] [Indexed: 06/15/2023]
Abstract
The immobilization of copper-containing nitrite reductase (NiR) from Alcaligenes faecalis on functionalised multi-walled carbon nanotube (MWCNT) electrodes is reported. It is demonstrated that this immobilization is mainly driven by hydrophobic interactions, promoted by the modification of MWCNTs with adamantyl groups. Direct electrochemistry shows high bioelectrochemical reduction of nitrite at the redox potential of NiR with high current density of 1.41 mA cm-2 . Furthermore, the desymmetrization of the trimer upon immobilization induces an independent electrocatalytic behavior for each of the three enzyme subunits, corroborated by an electron-tunneling distance dependence.
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Affiliation(s)
| | - David Roura Padrosa
- Department of Chemistry, Biochemistry, and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Hélène Jamet
- Univ. Grenoble Alpes, CNRS DCM, 38000, Grenoble, France
| | - Martin Albrecht
- Department of Chemistry, Biochemistry, and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Francesca Paradisi
- Department of Chemistry, Biochemistry, and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland
| | - Alan Le Goff
- Univ. Grenoble Alpes, CNRS DCM, 38000, Grenoble, France
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2
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Fujita K, Nonaka T, Kutsuno R, Ichida K. Electrochemical sensing of the secretion of indoxyl sulfate in a rat intestinal loop using a self-assembled monolayer-modified gold bead electrode. Talanta 2022; 247:123551. [PMID: 35649325 DOI: 10.1016/j.talanta.2022.123551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Revised: 03/01/2022] [Accepted: 05/12/2022] [Indexed: 11/20/2022]
Abstract
Indoxyl sulfate is a uremic toxin that accumulates in the plasma after a decline in renal function that might progress to chronic kidney disease (CKD). This accumulation is associated with the onset of dialysis and exacerbation of CKD and cardiovascular diseases. In this study, we aimed to demonstrate intestinal secretion as an excretion pathway of indoxyl sulfate in the severe stage of CKD using electrochemical sensing. A self-assembled monolayer (SAM) of 2-mercaptobenzimidazole on gold beads was successfully used for the separate sensing of indoxyl sulfate, uric acid (UA), and ascorbic acid. This electrode could detect indoxyl sulfate at concentrations as low as 50 nM in the presence of UA. No indoxyl sulfate secretion was observed in the intestinal loop of healthy rats or those intravenously administered saline. However, indoxyl sulfate secretion was detected in the 5/6 nephrectomized rats that showed high serum indoxyl sulfate levels, which also occurs in patients with CKD stage 4 or 5 and the healthy rats intravenously injected with indoxyl sulfate. These results suggest that indoxyl sulfate is excreted through the intestine when serum indoxyl sulfate level is high. The results of the present study showed that the SAM-modified gold bead electrode can be used as an easy and sensitive method for evaluating indoxyl sulfate secreted in the intestine over time.
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Affiliation(s)
- Kyoko Fujita
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
| | - Taisei Nonaka
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Rina Kutsuno
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
| | - Kimiyoshi Ichida
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan
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3
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Mitra S, Ainavarapu SRK, Dasgupta J. Long-Range Charge Delocalization Mediates the Ultrafast Ligand-to-Metal Charge Transfer Dynamics at the Cu 2+-Active Site in Azurin. J Phys Chem B 2022; 126:5390-5399. [PMID: 35797135 DOI: 10.1021/acs.jpcb.2c01427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The blue color metalloprotein in azurin has traditionally been attributed to the intense cysteine-to-Cu2+ ligand-to-metal charge transfer transition centered at 628 nm. Although resonance Raman measurements of the Cu2+ active site have implied that the LMCT transition electronically couples to the protein scaffold well beyond its primary metal-ligand coordination shell, the structural extent of this electronic coupling and visualization of the protein-mediated charge transfer dynamics have remained elusive. Here, using femtosecond broadband transient absorption and impulsive Raman spectroscopy, we provide direct evidence for a rapid relaxation between two distinct charge transfer states, having different spatial delocalization, within ∼300 fs followed by recombination of charges in subpicosecond time scales. We invoke the formation of a protein-centered radical cation, possibly Trp48 or a Phe residue, within 100 fs substantiating the long-range electronic coupling for the first time beyond the traditional copper active site. The Raman spectra of the excited CT state show the presence of protein-centric vibrations along with the vibrational modes assigned to the copper active site. Our results demonstrate a large delocalization length scale of the initially populated CT state, thereby highlighting the possibility of exploiting azurin photochemistry for energy conversion techniques.
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Affiliation(s)
- Soumyajit Mitra
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
| | | | - Jyotishman Dasgupta
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Mumbai 400005, India
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4
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López-Ortiz M, Zamora RA, Giannotti MI, Hu C, Croce R, Gorostiza P. Distance and Potential Dependence of Charge Transport Through the Reaction Center of Individual Photosynthetic Complexes. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104366. [PMID: 34874621 DOI: 10.1002/smll.202104366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 11/11/2021] [Indexed: 06/13/2023]
Abstract
Charge separation and transport through the reaction center of photosystem I (PSI) is an essential part of the photosynthetic electron transport chain. A strategy is developed to immobilize and orient PSI complexes on gold electrodes allowing to probe the complex's electron acceptor side, the chlorophyll special pair P700. Electrochemical scanning tunneling microscopy (ECSTM) imaging and current-distance spectroscopy of single protein complex shows lateral size in agreement with its known dimensions, and a PSI apparent height that depends on the probe potential revealing a gating effect in protein conductance. In current-distance spectroscopy, it is observed that the distance-decay constant of the current between PSI and the ECSTM probe depends on the sample and probe electrode potentials. The longest charge exchange distance (lowest distance-decay constant β) is observed at sample potential 0 mV/SSC (SSC: reference electrode silver/silver chloride) and probe potential 400 mV/SSC. These potentials correspond to hole injection into an electronic state that is available in the absence of illumination. It is proposed that a pair of tryptophan residues located at the interface between P700 and the solution and known to support the hydrophobic recognition of the PSI redox partner plastocyanin, may have an additional role as hole exchange mediator in charge transport through PSI.
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Affiliation(s)
- Manuel López-Ortiz
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, Barcelona, 08028, Spain
- Network Biomedical Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, 28029, Spain
| | - Ricardo A Zamora
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, Barcelona, 08028, Spain
- Network Biomedical Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, 28029, Spain
| | - Marina Inés Giannotti
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, Barcelona, 08028, Spain
- Network Biomedical Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, 28029, Spain
- Department of Materials Science and Physical Chemistry, University of Barcelona, Martí i Franquès 1-11, Barcelona, 08028, Spain
| | - Chen Hu
- Biophysics of PhotosynthesisDepartment of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1081, Amsterdam, 1081 HV, The Netherlands
| | - Roberta Croce
- Biophysics of PhotosynthesisDepartment of Physics and Astronomy, Faculty of Sciences, Vrije Universiteit Amsterdam, De Boelelaan 1081, Amsterdam, 1081 HV, The Netherlands
| | - Pau Gorostiza
- Institute for Bioengineering of Catalonia (IBEC), The Barcelona Institute of Science and Technology, Baldiri Reixac 10-12, Barcelona, 08028, Spain
- Network Biomedical Research Center on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Madrid, 28029, Spain
- Catalan Institution for Research and Advanced Studies (ICREA), Barcelona, 08010, Spain
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5
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Murgida DH. In Situ Spectroelectrochemical Investigations of Electrode-Confined Electron-Transferring Proteins and Redox Enzymes. ACS OMEGA 2021; 6:3435-3446. [PMID: 33585730 PMCID: PMC7876673 DOI: 10.1021/acsomega.0c05746] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/19/2021] [Indexed: 06/09/2023]
Abstract
This perspective analyzes recent advances in the spectroelectrochemical investigation of redox proteins and enzymes immobilized on biocompatible or biomimetic electrode surfaces. Specifically, the article highlights new insights obtained by surface-enhanced resonance Raman (SERR), surface-enhanced infrared absorption (SEIRA), protein film infrared electrochemistry (PFIRE), polarization modulation infrared reflection-absorption spectroscopy (PMIRRAS), Förster resonance energy transfer (FRET), X-ray absorption spectroscopy (XAS), electron paramagnetic resonance (EPR), and differential electrochemical mass spectrometry (DMES)-based spectroelectrochemical methods on the structure, orientation, dynamics, and reaction mechanisms for a variety of immobilized species. This includes small heme and copper electron shuttling proteins, large respiratory complexes, hydrogenases, multicopper oxidases, alcohol dehydrogenases, endonucleases, NO-reductases, and dye decolorizing peroxidases, among other enzymes. Finally, I discuss the challenges and foreseeable future developments toward a better understanding of the functioning of these complex macromolecules and their exploitation in technological devices.
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Affiliation(s)
- Daniel H. Murgida
- Departamento
de Química Inorgánica, Analítica y Química-Física,
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos
Aires 1428, Argentina
- Instituto
de Química Física de los Materiales, Medio Ambiente
y Energía (INQUIMAE), CONICET-Universidad de Buenos Aires, Buenos Aires C1428EHA, Argentina
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6
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Melin F, Hellwig P. Redox Properties of the Membrane Proteins from the Respiratory Chain. Chem Rev 2020; 120:10244-10297. [DOI: 10.1021/acs.chemrev.0c00249] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Frederic Melin
- Chimie de la Matière Complexe UMR 7140, Laboratoire de Bioelectrochimie et Spectroscopie, CNRS-Université de Strasbourg, 1 rue Blaise Pascal, 67070 Strasbourg, France
| | - Petra Hellwig
- Chimie de la Matière Complexe UMR 7140, Laboratoire de Bioelectrochimie et Spectroscopie, CNRS-Université de Strasbourg, 1 rue Blaise Pascal, 67070 Strasbourg, France
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7
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Nikolaev A, Makarchuk I, Thesseling A, Hoeser J, Friedrich T, Melin F, Hellwig P. Stabilization of the Highly Hydrophobic Membrane Protein, Cytochrome bd Oxidase, on Metallic Surfaces for Direct Electrochemical Studies. Molecules 2020; 25:molecules25143240. [PMID: 32708635 PMCID: PMC7397230 DOI: 10.3390/molecules25143240] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/08/2020] [Accepted: 07/14/2020] [Indexed: 11/23/2022] Open
Abstract
The cytochrome bd oxidase catalyzes the reduction of oxygen to water in bacteria and it is thus an interesting target for electrocatalytic studies and biosensor applications. The bd oxidase is completely embedded in the phospholipid membrane. In this study, the variation of the surface charge of thiol-modified gold nanoparticles, the length of the thiols and the other crucial parameters including optimal phospholipid content and type, have been performed, giving insight into the role of these factors for the optimal interaction and direct electron transfer of an integral membrane protein. Importantly, all three tested factors, the lipid type, the electrode surface charge and the thiol length mutually influenced the stability of films of the cytochrome bd oxidase. The best electrocatalytic responses were obtained on the neutral gold surface when the negatively charged phosphatidylglycerol (PG) was used and on the charged gold surface when the zwitterionic phosphatidylethanolamine (PE) was used. The advantages of the covalent binding of the membrane protein to the electrode surface over the non-covalent binding are also discussed.
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Affiliation(s)
- Anton Nikolaev
- Laboratoire de Bioelectrochimie et Spectroscopie, UMR 7140, Chimie de la Matière Complexe, Université de Strasbourg, CNRS, 67081 Strasbourg, France; (A.N.); (I.M.)
| | - Iryna Makarchuk
- Laboratoire de Bioelectrochimie et Spectroscopie, UMR 7140, Chimie de la Matière Complexe, Université de Strasbourg, CNRS, 67081 Strasbourg, France; (A.N.); (I.M.)
| | - Alexander Thesseling
- Institut für Biochemie, Fakultät für Chemie und Pharmazie, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany; (A.T.); (J.H.); (T.F.)
| | - Jo Hoeser
- Institut für Biochemie, Fakultät für Chemie und Pharmazie, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany; (A.T.); (J.H.); (T.F.)
| | - Thorsten Friedrich
- Institut für Biochemie, Fakultät für Chemie und Pharmazie, Albert-Ludwigs-Universität Freiburg, 79104 Freiburg, Germany; (A.T.); (J.H.); (T.F.)
| | - Frédéric Melin
- Laboratoire de Bioelectrochimie et Spectroscopie, UMR 7140, Chimie de la Matière Complexe, Université de Strasbourg, CNRS, 67081 Strasbourg, France; (A.N.); (I.M.)
- Correspondence: (F.M.); (P.H.)
| | - Petra Hellwig
- Laboratoire de Bioelectrochimie et Spectroscopie, UMR 7140, Chimie de la Matière Complexe, Université de Strasbourg, CNRS, 67081 Strasbourg, France; (A.N.); (I.M.)
- Correspondence: (F.M.); (P.H.)
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8
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Zitare UA, Szuster J, Santalla MC, Morgada MN, Vila AJ, Murgida DH. Dynamical effects in metalloprotein heterogeneous electron transfer. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136095] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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9
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Fujita K, Yamada H, Iijima M, Ichida K. Electrochemical analysis of uric acid excretion to the intestinal lumen: Effect of serum uric acid-lowering drugs and 5/6 nephrectomy on intestinal uric acid levels. PLoS One 2019; 14:e0226918. [PMID: 31891613 PMCID: PMC6938314 DOI: 10.1371/journal.pone.0226918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/06/2019] [Indexed: 11/19/2022] Open
Abstract
Recently, extensive efforts have been made to understand the importance of the extra-renal uric acid (UA) excretion pathways and their contribution to UA-related diseases. However, the method typically used to measure UA concentrations in the intestinal lumen is difficult to real time and dynamic analysis. In this study, UA excretion in the rat intestinal lumen was measured in real time using an electrochemical method. A sensitive electrode to detect UA was constructed using a gold electrode modified with a mixed self-assembled monolayer. Excretion rate of UA in the intestine was calculated using time course data. A decrease in UA excretion rate was observed in the intestine after administration of serum UA-lowering drugs (benzbromarone, febuxostat, and topiroxostat). Inhibition of ATP-binding cassette transporter G2 (ABCG2) which has been reported as an important exporter of UA was suggested by administration of these drugs. On the other hand, an increase in excretion rate of UA was observed in the intestine of 5/6 nephrectomy rats. Upregulation of mRNA expression of the UA transporter organic anion transporter OAT3, which is related to the secretion at the basal membrane, suggested an enhancement of UA excretion by ABCG2, a high-capacity UA exporter. Observed urate excretion dynamics and mRNA expression of UA transporters in the intestine upon administration of serum UA-lowering drugs and 5/6 nephrectomy improve our understanding of the underlying mechanisms of intestinal UA excretion.
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Affiliation(s)
- Kyoko Fujita
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
- * E-mail:
| | - Hiroki Yamada
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Masahiro Iijima
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
| | - Kimiyoshi Ichida
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Horinouchi, Hachioji, Tokyo, Japan
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10
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Affiliation(s)
- Dmitry V. Matyushov
- Department of Physics and School of Molecular Sciences, Arizona State University, PO Box 871504, Tempe, Arizona 85287-1504, United States
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11
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Zitare UA, Szuster J, Santalla MC, Llases ME, Morgada MN, Vila AJ, Murgida DH. Fine Tuning of Functional Features of the Cu A Site by Loop-Directed Mutagenesis. Inorg Chem 2019; 58:2149-2157. [PMID: 30644741 DOI: 10.1021/acs.inorgchem.8b03244] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Here we report the spectroscopic and electrochemical characterization of three novel chimeric CuA proteins in which either one or the three loops surrounding the metal ions in the Thermus thermophilus protein have been replaced by homologous human and plant sequences while preserving the set of coordinating amino acids. These conservative modifications mimic basic differences between CuA sites from different organisms and allow for fine tuning the energy gap between alternative electronic ground states of CuA.. This results in a systematic modulation of thermodynamic and kinetic electron transfer (ET) parameters and in the selection of one of two possible redox-active molecular orbitals, which differ in the ET reorganization energy by a factor of 2. Moreover, the ET mechanism is found to be frictionally controlled, and the modifications introduced into the different chimeras do not affect the frictional activation parameter.
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Affiliation(s)
- Ulises A Zitare
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales , Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE) , Universidad de Buenos Aires and CONICET, 1428 Buenos Aires , Argentina
| | - Jonathan Szuster
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales , Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE) , Universidad de Buenos Aires and CONICET, 1428 Buenos Aires , Argentina
| | - María C Santalla
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales , Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE) , Universidad de Buenos Aires and CONICET, 1428 Buenos Aires , Argentina
| | - María E Llases
- Departamento de Química Biológica, Facultad de Ciencias Bioquímicas y Farmacéuticas , Instituto de Biología Molecular y Celular de Rosario (IBR) , Universidad Nacional de Rosario and CONICET, 2000 Rosario , Argentina
| | - Marcos N Morgada
- Departamento de Química Biológica, Facultad de Ciencias Bioquímicas y Farmacéuticas , Instituto de Biología Molecular y Celular de Rosario (IBR) , Universidad Nacional de Rosario and CONICET, 2000 Rosario , Argentina
| | - Alejandro J Vila
- Departamento de Química Biológica, Facultad de Ciencias Bioquímicas y Farmacéuticas , Instituto de Biología Molecular y Celular de Rosario (IBR) , Universidad Nacional de Rosario and CONICET, 2000 Rosario , Argentina
| | - Daniel H Murgida
- Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales , Instituto de Química Física de los Materiales, Medio Ambiente y Energía (INQUIMAE) , Universidad de Buenos Aires and CONICET, 1428 Buenos Aires , Argentina
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12
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The role of molecular crowding in long-range metalloprotein electron transfer: Dissection into site- and scaffold-specific contributions. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2018.10.069] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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13
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Espinoza-Cara A, Zitare U, Alvarez-Paggi D, Klinke S, Otero LH, Murgida DH, Vila AJ. Engineering a bifunctional copper site in the cupredoxin fold by loop-directed mutagenesis. Chem Sci 2018; 9:6692-6702. [PMID: 30310603 PMCID: PMC6115626 DOI: 10.1039/c8sc01444b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 06/27/2018] [Indexed: 12/30/2022] Open
Abstract
Copper sites in proteins are designed to perform either electron transfer or redox catalysis. Type 1 and CuA sites are electron transfer hubs bound to a rigid protein fold that prevents binding of exogenous ligands and side reactions. Here we report the engineering of two Type 1 sites by loop-directed mutagenesis within a CuA scaffold with unique electronic structures and functional features. A copper-thioether axial bond shorter than the copper-thiolate bond is responsible for the electronic structure features, in contrast to all other natural or chimeric sites where the copper thiolate bond is short. These sites display highly unusual features, such as: (1) a high reduction potential despite a strong interaction with the axial ligand, which we attribute to changes in the hydrogen bond network and (2) the ability to bind exogenous ligands such as imidazole and azide. This strategy widens the possibility of using natural protein scaffolds with functional features not present in nature.
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Affiliation(s)
- Andrés Espinoza-Cara
- Instituto de Biología Molecular y Celular de Rosario (IBR, CONICET-UNR) , Rosario , Argentina .
- Área Biofísica , Departamento de Química Biológica , Facultad de Ciencias Bioquímicas y Farmacéuticas , Universidad Nacional de Rosario , Rosario , Argentina
| | - Ulises Zitare
- Departamento de Química Inorgánica , Analítica y Química Física-INQUIMAE , Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires-CONICET , Buenos Aires , Argentina
| | - Damián Alvarez-Paggi
- Departamento de Química Inorgánica , Analítica y Química Física-INQUIMAE , Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires-CONICET , Buenos Aires , Argentina
- Fundación Instituto Leloir , IIBBA-CONICET , Buenos Aires , Argentina
| | - Sebastián Klinke
- Fundación Instituto Leloir , IIBBA-CONICET , Buenos Aires , Argentina
- Plataforma Argentina de Biología Estructural y Metabolómica PLABEM. , Buenos Aires , Argentina
| | - Lisandro H Otero
- Fundación Instituto Leloir , IIBBA-CONICET , Buenos Aires , Argentina
- Plataforma Argentina de Biología Estructural y Metabolómica PLABEM. , Buenos Aires , Argentina
| | - Daniel H Murgida
- Departamento de Química Inorgánica , Analítica y Química Física-INQUIMAE , Facultad de Ciencias Exactas y Naturales , Universidad de Buenos Aires-CONICET , Buenos Aires , Argentina
| | - Alejandro J Vila
- Instituto de Biología Molecular y Celular de Rosario (IBR, CONICET-UNR) , Rosario , Argentina .
- Área Biofísica , Departamento de Química Biológica , Facultad de Ciencias Bioquímicas y Farmacéuticas , Universidad Nacional de Rosario , Rosario , Argentina
- Plataforma Argentina de Biología Estructural y Metabolómica PLABEM. , Buenos Aires , Argentina
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14
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Tao X, Shushkov P, Miller TF. Path-integral isomorphic Hamiltonian for including nuclear quantum effects in non-adiabatic dynamics. J Chem Phys 2018; 148:102327. [DOI: 10.1063/1.5005544] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Xuecheng Tao
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Philip Shushkov
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
| | - Thomas F. Miller
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
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15
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Melin F, Schoepp-Cothenet B, Abdulkarim S, Noor MR, Soulimane T, Hellwig P. Electrochemical study of an electron shuttle diheme protein: The cytochrome c from T. thermophilus. Inorganica Chim Acta 2017. [DOI: 10.1016/j.ica.2017.05.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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16
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Alvarez-Paggi D, Hannibal L, Castro MA, Oviedo-Rouco S, Demicheli V, Tórtora V, Tomasina F, Radi R, Murgida DH. Multifunctional Cytochrome c: Learning New Tricks from an Old Dog. Chem Rev 2017; 117:13382-13460. [DOI: 10.1021/acs.chemrev.7b00257] [Citation(s) in RCA: 135] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Damián Alvarez-Paggi
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
| | - Luciana Hannibal
- Department
of Pediatrics, Universitätsklinikum Freiburg, Mathildenstrasse 1, Freiburg 79106, Germany
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - María A. Castro
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
| | - Santiago Oviedo-Rouco
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
| | - Veronica Demicheli
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Veronica Tórtora
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Florencia Tomasina
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Rafael Radi
- Departamento
de Bioquímica and Center for Free Radical and Biomedical Research,
Facultad de Medicina, Universidad de la República, Av.
Gral. Flores 2125, Montevideo 11800, Uruguay
| | - Daniel H. Murgida
- Departamento
de Química Inorgánica, Analítica y Química
Física and INQUIMAE (CONICET-UBA), Facultad de Ciencias Exactas
y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pab. 2, piso 1, Buenos Aires C1428EHA, Argentina
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17
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Baldacchini C, Bizzarri AR, Cannistraro S. Electron transfer, conduction and biorecognition properties of the redox metalloprotein Azurin assembled onto inorganic substrates. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.04.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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18
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Miller DC, Tarantino KT, Knowles RR. Proton-Coupled Electron Transfer in Organic Synthesis: Fundamentals, Applications, and Opportunities. Top Curr Chem (Cham) 2016; 374:30. [PMID: 27573270 PMCID: PMC5107260 DOI: 10.1007/s41061-016-0030-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 04/21/2016] [Indexed: 10/21/2022]
Abstract
Proton-coupled electron transfers (PCETs) are unconventional redox processes in which both protons and electrons are exchanged, often in a concerted elementary step. While PCET is now recognized to play a central a role in biological redox catalysis and inorganic energy conversion technologies, its applications in organic synthesis are only beginning to be explored. In this chapter, we aim to highlight the origins, development, and evolution of the PCET processes most relevant to applications in organic synthesis. Particular emphasis is given to the ability of PCET to serve as a non-classical mechanism for homolytic bond activation that is complimentary to more traditional hydrogen atom transfer processes, enabling the direct generation of valuable organic radical intermediates directly from their native functional group precursors under comparatively mild catalytic conditions. The synthetically advantageous features of PCET reactivity are described in detail, along with examples from the literature describing the PCET activation of common organic functional groups.
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Affiliation(s)
- David C Miller
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Kyle T Tarantino
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA
| | - Robert R Knowles
- Department of Chemistry, Princeton University, Princeton, NJ, 08544, USA.
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19
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Zhu N, Hao X, Ulstrup J, Chi Q. Single-Nanoparticle Resolved Biomimetic Long-Range Electron Transfer and Electrocatalysis of Mixed-Valence Nanoparticles. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00411] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nan Zhu
- Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, DK-2800 Kongens Lyngby, Denmark
| | - Xian Hao
- Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, DK-2800 Kongens Lyngby, Denmark
| | - Jens Ulstrup
- Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, DK-2800 Kongens Lyngby, Denmark
| | - Qijin Chi
- Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, DK-2800 Kongens Lyngby, Denmark
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20
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Al Mamun AH, Zahid AASM, Lee I, Kang HS, Hahn JR. Phase Segregation in the Mixed Alkyl Thiol Self-assembled Monolayers on a Gold Surface at a High Incubation Temperature in a Sealed Container. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10552] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Abdulla Hel Al Mamun
- Department of Chemistry and Bioactive Material Sciences; Research Institute of Physics and Chemistry, Chonbuk National University; Jeonju 561-756 Korea
| | - Ali A. S. M. Zahid
- Department of Chemistry and Bioactive Material Sciences; Research Institute of Physics and Chemistry, Chonbuk National University; Jeonju 561-756 Korea
| | - Insup Lee
- Department of Chemistry and Bioactive Material Sciences; Research Institute of Physics and Chemistry, Chonbuk National University; Jeonju 561-756 Korea
| | - Hong Seok Kang
- Department of Nano & Advanced Materials Engineering; Jeonju University; Jeonju 560-759 Korea
| | - Jae Ryang Hahn
- Department of Chemistry and Bioactive Material Sciences; Research Institute of Physics and Chemistry, Chonbuk National University; Jeonju 561-756 Korea
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21
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Casalini S, Berto M, Kovtun A, Operamolla A, Di Rocco G, Facci P, Liscio A, Farinola GM, Borsari M, Bortolotti CA. Surface Immobilized His-tagged Azurin as a Model Interface for the Investigation of Vectorial Electron Transfer in Biological Systems. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.07.156] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Zitare U, Alvarez-Paggi D, Morgada MN, Abriata LA, Vila AJ, Murgida DH. Reversible Switching of Redox-Active Molecular Orbitals and Electron Transfer Pathways in CuASites of Cytochrome cOxidase. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Zitare U, Alvarez-Paggi D, Morgada MN, Abriata LA, Vila AJ, Murgida DH. Reversible Switching of Redox-Active Molecular Orbitals and Electron Transfer Pathways in Cu(A) Sites of Cytochrome c Oxidase. Angew Chem Int Ed Engl 2015; 54:9555-9. [PMID: 26118421 DOI: 10.1002/anie.201504188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Indexed: 11/06/2022]
Abstract
The Cu(A) site of cytochrome c oxidase is a redox hub that participates in rapid electron transfer at low driving forces with two redox cofactors in nearly perpendicular orientations. Spectroscopic and electrochemical characterizations performed on first and second-sphere mutants have allowed us to experimentally detect the reversible switching between two alternative electronic states that confer different directionalities to the redox reaction. Specifically, the M160H variant of a native Cu(A) shows a reversible pH transition that allows to functionally probe both states in the same protein species. Alternation between states exerts a dramatic impact on the kinetic redox parameters, thereby suggesting this effect as the mechanism underlying the efficiency and directionality of Cu(A) electron transfer in vivo. These findings may also prove useful for the development of molecular electronics.
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Affiliation(s)
- Ulises Zitare
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET (Argentina)
| | - Damián Alvarez-Paggi
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET (Argentina)
| | - Marcos N Morgada
- Instituto de Biología Molecular y Celular de Rosario (IBR), Departamento de Química Biológica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and CONICET (Argentina)
| | - Luciano A Abriata
- Instituto de Biología Molecular y Celular de Rosario (IBR), Departamento de Química Biológica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and CONICET (Argentina)
| | - Alejandro J Vila
- Instituto de Biología Molecular y Celular de Rosario (IBR), Departamento de Química Biológica, Facultad de Ciencias Bioquímicas y Farmacéuticas, Universidad Nacional de Rosario and CONICET (Argentina)
| | - Daniel H Murgida
- Instituto de Química Física de los Materiales, Medio Ambiente y Energía, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires and CONICET (Argentina).
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24
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Breker V, Sak H, Baracchi-Krause G, Krause N. Synthesis and properties of a biotin-tagged NHC–gold complex. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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25
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Sugimoto Y, Kitazumi Y, Tsujimura S, Shirai O, Yamamoto M, Kano K. Electrostatic interaction between an enzyme and electrodes in the electric double layer examined in a view of direct electron transfer-type bioelectrocatalysis. Biosens Bioelectron 2015; 63:138-144. [DOI: 10.1016/j.bios.2014.07.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2014] [Revised: 07/11/2014] [Accepted: 07/11/2014] [Indexed: 11/25/2022]
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26
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Artés JM, López-Martínez M, Díez-Pérez I, Sanz F, Gorostiza P. Nanoscale charge transfer in redox proteins and DNA: Towards biomolecular electronics. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.05.089] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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27
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Akkilic N, Kamran M, Stan R, Sanghamitra NJM. Voltage-controlled fluorescence switching of a single redox protein. Biosens Bioelectron 2014; 67:747-51. [PMID: 25103339 DOI: 10.1016/j.bios.2014.07.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Revised: 07/14/2014] [Accepted: 07/22/2014] [Indexed: 02/07/2023]
Abstract
Heterogeneous electron transfer (ET) of the redox protein, wild-type azurin (wt-Az) from Pseudomonas aeruginosa, was monitored at the single-molecule (SM) level by fluorescence resonance energy transfer (FRET), one electron at a time. Azurin molecules were labeled with an organic fluorophore (Cy5), and the FRET-coupling between Cy5 and the redox center (copper) was used to study ET to a semi-transparent, 10nm thin gold electrode in an optical configuration. By using a confocal microscope and a bipotentiostat for control of the electrode potential, the oxidation and reduction processes of individual Az-Cy5 molecules were monitored. In the oxidized state of the redox center of the azurin molecule, the fluorescence emission of the covalently attached Cy5 was largely quenched by FRET ('off'-state), whereas the emission was recovered upon reduction ('on'-state). The work presented here, shows directly controlled single redox switching events of an individual redox protein and its thermodynamic dispersion. We show that the distribution of midpoint potentials (E0) of individual azurin molecules peaks at 45.7±0.5 mV with a full width at half maximum of 15 mV vs saturated calomel electrode (SCE).
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Affiliation(s)
- Namik Akkilic
- Leiden Institute of Physics, Huygens Laboratory, Leiden University, Leiden, The Netherlands.
| | - Muhammad Kamran
- Leiden Institute of Physics, Huygens Laboratory, Leiden University, Leiden, The Netherlands
| | - Razvan Stan
- Leiden Institute of Physics, Huygens Laboratory, Leiden University, Leiden, The Netherlands
| | - Nusrat J M Sanghamitra
- Leiden Institute of Physics, Huygens Laboratory, Leiden University, Leiden, The Netherlands
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28
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Liu J, Chakraborty S, Hosseinzadeh P, Yu Y, Tian S, Petrik I, Bhagi A, Lu Y. Metalloproteins containing cytochrome, iron-sulfur, or copper redox centers. Chem Rev 2014; 114:4366-469. [PMID: 24758379 PMCID: PMC4002152 DOI: 10.1021/cr400479b] [Citation(s) in RCA: 549] [Impact Index Per Article: 54.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Indexed: 02/07/2023]
Affiliation(s)
- Jing Liu
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Saumen Chakraborty
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Parisa Hosseinzadeh
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yang Yu
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Shiliang Tian
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Igor Petrik
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ambika Bhagi
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yi Lu
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
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29
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Alvarez-Paggi D, Zitare U, Murgida DH. The role of protein dynamics and thermal fluctuations in regulating cytochrome c/cytochrome c oxidase electron transfer. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2014; 1837:1196-207. [PMID: 24502917 DOI: 10.1016/j.bbabio.2014.01.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Revised: 01/22/2014] [Accepted: 01/28/2014] [Indexed: 01/06/2023]
Abstract
In this overview we present recent combined electrochemical, spectroelectrochemical, spectroscopic and computational studies from our group on the electron transfer reactions of cytochrome c and of the primary electron acceptor of cytochrome c oxidase, the CuA site, in biomimetic complexes. Based on these results, we discuss how protein dynamics and thermal fluctuations may impact on protein ET reactions, comment on the possible physiological relevance of these results, and finally propose a regulatory mechanism that may operate in the Cyt/CcO electron transfer reaction in vivo. This article is part of a Special Issue entitled: 18th European Bioenergetic Conference.
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Affiliation(s)
- Damian Alvarez-Paggi
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, pab. 2, piso 3, C1428EHA Buenos Aires, Argentina
| | - Ulises Zitare
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, pab. 2, piso 3, C1428EHA Buenos Aires, Argentina
| | - Daniel H Murgida
- INQUIMAE-CONICET, Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, pab. 2, piso 3, C1428EHA Buenos Aires, Argentina.
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30
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Sengupta K, Chatterjee S, Samanta S, Bandyopadhyay S, Dey A. Resonance Raman and Electrocatalytic Behavior of Thiolate and Imidazole Bound Iron Porphyrin Complexes on Self Assembled Monolayers: Functional Modeling of Cytochrome P450. Inorg Chem 2013; 52:2000-14. [DOI: 10.1021/ic302369v] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Kushal Sengupta
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science,
Kolkata, India 700032
| | - Sudipta Chatterjee
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science,
Kolkata, India 700032
| | - Subhra Samanta
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science,
Kolkata, India 700032
| | - Sabyasachi Bandyopadhyay
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science,
Kolkata, India 700032
| | - Abhishek Dey
- Department of Inorganic Chemistry, Indian Association for the Cultivation of Science,
Kolkata, India 700032
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31
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Clark RA, Trout CJ, Ritchey LE, Marciniak AN, Weinzierl M, Schirra CN, Christopher Kurtz D. Electrochemical titration of carboxylic acid terminated SAMs on evaporated gold: Understanding the ferricyanide electrochemistry at the electrode surface. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.11.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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32
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Wilson TD, Yu Y, Lu Y. Understanding copper-thiolate containing electron transfer centers by incorporation of unnatural amino acids and the CuA center into the type 1 copper protein azurin. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2012.06.015] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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33
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Young PC, Green SLJ, Rosair GM, Lee AL. Deactivation of gold(i) catalysts in the presence of thiols and amines – characterisation and catalysis. Dalton Trans 2013; 42:9645-53. [DOI: 10.1039/c3dt50653c] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Ranieri A, Battistuzzi G, Borsari M, Bortolotti CA, Di Rocco G, Sola M. pH and solvent H/D isotope effects on the thermodynamics and kinetics of electron transfer for electrode-immobilized native and urea-unfolded stellacyanin. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:15087-15094. [PMID: 23009339 DOI: 10.1021/la303363h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The thermodynamics of Cu(II) to Cu(I) reduction and the kinetics of the electron transfer (ET) process for Rhus vernicifera stellacyanin (STC) immobilized on a decane-1-thiol coated gold electrode have been measured through cyclic voltammetry at varying pH and temperature, in the presence of urea and in D(2)O. Immobilized STC undergoes a limited conformational change that mainly results in an enhanced exposure of one or both copper binding histidines to solvent which slightly stabilizes the cupric state and increases histidine basicity. The large immobilization-induced increase in the pK(a) for the acid transition (from 4.5 to 6.3) makes this electrode-SAM-protein construct an attractive candidate as a biomolecular ET switch operating near neutral pH in molecular electronics. Such a potential interest is increased by the robustness of this interface against chemical unfolding as it undergoes only moderate changes in the reduction thermodynamics and in the ET rate in the presence of up to 8 M urea. The sensitivity of these parameters to solvent H/D isotope effects testifies to the role of protein solvation as effector of the thermodynamics and kinetics of ET.
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Affiliation(s)
- Antonio Ranieri
- Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Modena, Italy
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35
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Wang M, Sheng Q, Zhang D, He Y, Zheng J. TiC nanoparticles-chitosan composite film for the direct electron transfer of myoglobin and its application in biosensing. Bioelectrochemistry 2012; 86:46-53. [DOI: 10.1016/j.bioelechem.2012.01.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 01/15/2012] [Accepted: 01/21/2012] [Indexed: 10/14/2022]
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36
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Monari S, Battistuzzi G, Bortolotti CA, Yanagisawa S, Sato K, Li C, Salard I, Kostrz D, Borsari M, Ranieri A, Dennison C, Sola M. Understanding the Mechanism of Short-Range Electron Transfer Using an Immobilized Cupredoxin. J Am Chem Soc 2012; 134:11848-51. [DOI: 10.1021/ja303425b] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stefano Monari
- Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183,
41125 Modena, Italy
| | - Gianantonio Battistuzzi
- Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183,
41125 Modena, Italy
| | - Carlo A. Bortolotti
- Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183,
41125 Modena, Italy
- CNR-NANO Institute of Nanoscience, Via Campi 213/A, I-41125 Modena, Italy
| | - Sachiko Yanagisawa
- Institute for Cell and Molecular
Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, U.K
| | - Katsuko Sato
- Institute for Cell and Molecular
Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, U.K
| | - Chan Li
- Institute for Cell and Molecular
Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, U.K
| | - Isabelle Salard
- Institute for Cell and Molecular
Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, U.K
| | - Dorota Kostrz
- Institute for Cell and Molecular
Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, U.K
| | - Marco Borsari
- Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183,
41125 Modena, Italy
| | - Antonio Ranieri
- Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183,
41125 Modena, Italy
| | - Christopher Dennison
- Institute for Cell and Molecular
Biosciences, Medical School, Newcastle University, Newcastle upon Tyne, NE2 4HH, U.K
| | - Marco Sola
- Department of Chemistry, University of Modena and Reggio Emilia, Via Campi 183,
41125 Modena, Italy
- CNR-NANO Institute of Nanoscience, Via Campi 213/A, I-41125 Modena, Italy
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37
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López-Pérez DE, Revilla-López G, Jacquemin D, Zanuy D, Palys B, Sek S, Alemán C. Intermolecular interactions in electron transfer through stretched helical peptides. Phys Chem Chem Phys 2012; 14:10332-44. [DOI: 10.1039/c2cp40761b] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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38
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Sweep, step, pulse, and frequency-based techniques applied to protein monolayer electrochemistry at nanoparticle interfaces. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.09.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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39
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Khoa Ly H, Wisitruangsakul N, Sezer M, Feng JJ, Kranich A, Weidinger IM, Zebger I, Murgida DH, Hildebrandt P. Electric-field effects on the interfacial electron transfer and protein dynamics of cytochrome c. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2010.12.020] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Meyer T, Gross J, Blanck C, Schmutz M, Ludwig B, Hellwig P, Melin F. Electrochemistry of Cytochrome c1, Cytochrome c552, and CuA from the Respiratory Chain of Thermus thermophilus Immobilized on Gold Nanoparticles. J Phys Chem B 2011; 115:7165-70. [DOI: 10.1021/jp202656w] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas Meyer
- Laboratoire de Spectroscopie Vibrationnelle et Electrochimie des Biomolécules (Institut de Chimie, UdS), 1 Rue Blaise Pascal 67008 Strasbourg Cedex, France
| | - Julien Gross
- Laboratoire de Spectroscopie Vibrationnelle et Electrochimie des Biomolécules (Institut de Chimie, UdS), 1 Rue Blaise Pascal 67008 Strasbourg Cedex, France
| | - Christian Blanck
- Institut Charles Sadron (UPR22-CNRS, UdS), 23 rue du Loess BP 84047 67034 Strasbourg Cedex 2, France
| | - Marc Schmutz
- Institut Charles Sadron (UPR22-CNRS, UdS), 23 rue du Loess BP 84047 67034 Strasbourg Cedex 2, France
| | - Bernd Ludwig
- Institute of Biochemistry, Molecular Genetics Biocenter, Max-von-Laue-Str., 9, 60438 Frankfurt, Germany
| | - Petra Hellwig
- Laboratoire de Spectroscopie Vibrationnelle et Electrochimie des Biomolécules (Institut de Chimie, UdS), 1 Rue Blaise Pascal 67008 Strasbourg Cedex, France
| | - Frederic Melin
- Laboratoire de Spectroscopie Vibrationnelle et Electrochimie des Biomolécules (Institut de Chimie, UdS), 1 Rue Blaise Pascal 67008 Strasbourg Cedex, France
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Gulaboski R, Mirčeski V, Bogeski I, Hoth M. Protein film voltammetry: electrochemical enzymatic spectroscopy. A review on recent progress. J Solid State Electrochem 2011. [DOI: 10.1007/s10008-011-1397-5] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sokolová L, Williamson H, Sýkora J, Hof M, Gray HB, Brutschy B, Vlcek A. Mass spectrometric characterization of oligomers in Pseudomonas aeruginosa azurin solutions. J Phys Chem B 2011; 115:4790-800. [PMID: 21452827 DOI: 10.1021/jp110460k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have employed laser-induced liquid bead ion desorption mass spectroscopy (LILBID MS) to study the solution behavior of Pseudomonas aeruginosa azurin as well as two mutants and corresponding Re-labeled derivatives containing a Re(CO)(3)(4,7-dimethyl-1,10-phenanthroline)(+) chromophore appended to a surface histidine. LILBID spectra show broad oligomer distributions whose particular patterns depend on the solution composition (pure H(2)O, 20-30 mM NaCl, 20 and 50 mM NaP(i) or NH(4)P(i) at pH = 7). The distribution maximum shifts to smaller oligomers upon decreasing the azurin concentration and increasing the buffer concentration. Oligomerization is less extensive for native azurin than its mutants. The oligomerization propensities of unlabeled and Re-labeled proteins are generally comparable, and only Re126 shows some preference for the dimer that persists even in highly diluted solutions. Peak shifts to higher masses and broadening in 20-50 mM NaP(i) confirm strong azurin association with buffer ions and solvation. We have found that LILBID MS reveals the solution behavior of weakly bound nonspecific protein oligomers, clearly distinguishing individual components of the oligomer distribution. Independently, average data on oligomerization and the dependence on solution composition were obtained by time-resolved anisotropy of the Re-label photoluminescence that confirmed relatively long rotation correlation times, 6-30 ns, depending on Re-azurin and solution composition. Labeling proteins with Re-chromophores that have long-lived phosphorescence extends the time scale of anisotropy measurements to hundreds of nanoseconds, thereby opening the way for investigations of large oligomers with long rotation times.
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Affiliation(s)
- Lucie Sokolová
- Institute of Physical and Theoretical Chemistry, Goethe University, Frankfurt am Main, Germany
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Artés JM, Díez-Pérez I, Sanz F, Gorostiza P. Direct measurement of electron transfer distance decay constants of single redox proteins by electrochemical tunneling spectroscopy. ACS NANO 2011; 5:2060-2066. [PMID: 21539019 DOI: 10.1021/nn103236e] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present a method to measure directly and at the single-molecule level the distance decay constant that characterizes the rate of electron transfer (ET) in redox proteins. Using an electrochemical tunneling microscope under bipotentiostatic control, we obtained current−distance spectroscopic recordings of individual redox proteins confined within a nanometric tunneling gap at a well-defined molecular orientation. The tunneling current decays exponentially, and the corresponding decay constant (β) strongly supports a two-step tunneling ET mechanism. Statistical analysis of decay constant measurements reveals differences between the reduced and oxidized states that may be relevant to the control of ET rates in enzymes and biological electron transport chains.
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Affiliation(s)
- Juan M Artés
- Institute for Bioengineering of Catalonia, Barcelona, Spain
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Arikuma Y, Nakayama H, Morita T, Kimura S. Ultra-long-range electron transfer through a self-assembled monolayer on gold composed of 120-Å-long α-helices. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:1530-1535. [PMID: 21090665 DOI: 10.1021/la103882r] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Electron transfer through α-helices has attracted much attention from the viewpoints of their contributions to efficient long-range electron transfer occurring in biological systems and their utility as molecular-electronics elements. In this study, we synthesized a long 80mer helical peptide carrying a redox-active ferrocene unit at the terminal and immobilized the helical peptide on a gold surface. The molecular length is calculated to be 134 Å, in which the helix accounts for 120 Å. The preparation conditions of the self-assembled monolayers were intentionally changed to obtain monolayers with different physical states to study the correlation between molecular motions and electron transfer. Ellipsometry and infrared spectroscopy showed that the helical peptide forms a self-assembled monolayer with vertical orientation. Electrochemical measurements revealed that an electron is transferred from the ferrocene unit to gold through the monolayer composed of this long helical peptide, and the experimental data are well explained by theoretical results calculated under the assumption that electron transfer occurs by a unique hopping mechanism with the amide groups as hopping sites. Furthermore, we have observed a unique dependence of electron transfer on the monolayer packing, suggesting the importance of structural fluctuations of peptides on the electron transfer controlled by the hopping mechanism.
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Affiliation(s)
- Yoko Arikuma
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, Japan
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Abstract
Copper proteins play key roles in biological processes such as electron transfer and dioxygen activation; the active site of each of these proteins is classified as either type 1, 2, or 3, depending on its optical and electron paramagnetic resonance properties. We have built a new type of site that we call “type zero copper” by incorporating leucine, isoleucine, or phenylalanine in place of methionine at position 121 in C112D Pseudomonas aeruginosa azurin. X-ray crystallographic analysis shows that these sites adopt distorted tetrahedral geometries, with an unusually short Cu-O(G45 carbonyl) bond (2.35–2.55 Å). Relatively weak absorption near 800 nm and narrow parallel hyperfine splittings in EPR spectra are the spectroscopic signatures of type zero copper. Copper K-edge x-ray absorption spectra suggest elevated Cu(II) 4p character in the d-electron ground state. Cyclic voltammetric experiments demonstrate that the electron transfer reactivities of type zero azurins are enhanced relative to that of the corresponding type 2 (C112D) protein.
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Affiliation(s)
- Kyle M Lancaster
- California Institute of Technology, Pasadena, California 91125, USA
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Waldeck DH, Khoshtariya DE. Fundamental Studies of Long- and Short-Range Electron Exchange Mechanisms between Electrodes and Proteins. MODERN ASPECTS OF ELECTROCHEMISTRY 2011. [DOI: 10.1007/978-1-4614-0347-0_2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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47
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Doan TT, Vargo ML, Gerig JK, Gulka CP, Trawick ML, Dattelbaum JD, Leopold MC. Electrochemical analysis of azurin thermodynamic and adsorption properties at monolayer-protected cluster film assemblies – Evidence for a more homogeneous adsorption interface. J Colloid Interface Sci 2010; 352:50-8. [DOI: 10.1016/j.jcis.2010.08.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 08/14/2010] [Accepted: 08/17/2010] [Indexed: 10/19/2022]
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Lancaster KM, Yokoyama K, Richards JH, Winkler JR, Gray HB. High-potential C112D/M121X (X = M, E, H, L) Pseudomonas aeruginosa azurins. Inorg Chem 2010; 48:1278-80. [PMID: 19113863 DOI: 10.1021/ic802322e] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Site-directed mutagenesis of Pseudomonas aeruginosa azurin C112D at the M121 position has afforded a series of proteins with elevated Cu(II/I) reduction potentials relative to the Cu(II) aquo ion. The high potential and low axial hyperfine splitting (Cu(II) electron paramagnetic resonance A( parallel)) of the C112D/M121L protein are remarkably similar to features normally associated with type 1 copper centers.
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Affiliation(s)
- Kyle M Lancaster
- Beckman Institute, California Institute of Technology, Pasadena, California 91125, USA
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Eckermann AL, Feld DJ, Shaw JA, Meade TJ. Electrochemistry of redox-active self-assembled monolayers. Coord Chem Rev 2010; 254:1769-1802. [PMID: 20563297 PMCID: PMC2885823 DOI: 10.1016/j.ccr.2009.12.023] [Citation(s) in RCA: 357] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Redox-active self-assembled monolayers (SAMs) provide an excellent platform for investigating electron transfer kinetics. Using a well-defined bridge, a redox center can be positioned at a fixed distance from the electrode and electron transfer kinetics probed using a variety of electrochemical techniques. Cyclic voltammetry, AC voltammetry, electrochemical impedance spectroscopy, and chronoamperometry are most commonly used to determine the rate of electron transfer of redox-activated SAMs. A variety of redox species have been attached to SAMs, and include transition metal complexes (e.g., ferrocene, ruthenium pentaammine, osmium bisbipyridine, metal clusters) and organic molecules (e.g., galvinol, C(60)). SAMs offer an ideal environment to study the outer-sphere interactions of redox species. The composition and integrity of the monolayer and the electrode material influence the electron transfer kinetics and can be investigated using electrochemical methods. Theoretical models have been developed for investigating SAM structure. This review discusses methods and monolayer compositions for electrochemical measurements of redox-active SAMs.
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