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Dai Y, Proshlyakov DA, Swain GM. Effects of Film Morphology and Surface Chemistry on the Direct Electrochemistry of Cytochrome c at Boron-Doped Diamond Electrodes. Electrochim Acta 2016; 197:129-138. [PMID: 27103750 PMCID: PMC4834903 DOI: 10.1016/j.electacta.2016.02.032] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The effects of film morphology and surface termination on the direct electron transfer of horse heart cytochrome c on boron-doped ultrananocrystalline (B-UNCD) and microcrystalline (B-MCD) diamond thin-film electrodes were investigated. Quasi-reversible, diffusion-controlled cyclic voltammetric responses were observed on oxygen-terminated (atomic O/C ~0.015), but not hydrogen-terminated (atomic O/C ~0.02) diamond thin films. The effect of the surface termination was the same for both the nanostructured B-UNCD film with sp2-bonded carbon atoms in the grain boundaries and the well faceted B-MCD film with micron-sized grains and largely devoid of sp2 carbon. Stable cyclic voltammetric i-E curves were recorded with cycling for both oxygen-terminated films indicating the absence of protein denaturation and electrode fouling. The peak currents increased linearly with the square root of the scan rate and the protein concentration; both indicative of a reaction rate limited by semi-infinite linear diffusion of the protein. Similar heterogeneous electron-transfer rate constants were observed for oxygen-terminated B-UNCD (3.48 (± 1.25) × 10-3 cm/s) and B-MCD films (2.38 (± 0.72) × 10-3 cm/s). The results clearly reveal that the oxygen-terminated surface is more active for electron-transfer with this soluble redox protein than is the hydrogen-terminated surface. The film morphology does not influence the diffusion-controlled response of the redox protein.
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Affiliation(s)
| | | | - Greg M. Swain
- Department of Chemistry, Michigan State University, East Lansing, MI 48824
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2
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Santos TC, de Oliveira AR, Dantas JM, Salgueiro CA, Cordas CM. Thermodynamic and kinetic characterization of PccH, a key protein in microbial electrosynthesis processes in Geobacter sulfurreducens. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1847:1113-8. [DOI: 10.1016/j.bbabio.2015.06.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 05/29/2015] [Accepted: 06/07/2015] [Indexed: 10/23/2022]
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3
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Borhani HA, Berghmans H, Trashin S, De Wael K, Fago A, Moens L, Habibi-Rezaei M, Dewilde S. Kinetic properties and heme pocket structure of two domains of the polymeric hemoglobin of Artemia in comparison with the native molecule. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2015; 1854:1307-16. [PMID: 26004089 DOI: 10.1016/j.bbapap.2015.05.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Revised: 04/30/2015] [Accepted: 05/14/2015] [Indexed: 10/23/2022]
Abstract
In this project, we studied some physicochemical properties of two different globin domains of the polymeric hemoglobin of the brine shrimp Artemia salina and compared them with those of the native molecule. Two domains (AsHbC1D1 and AsHbC1D5) were cloned and expressed in BL21(DE3)pLysS strain of Escherichia coli. The recombinant proteins as well as the native hemoglobin (AfHb) were purified from bacteria and frozen Artemia, respectively by standard chromatographic methods and assessed by SDS-PAGE. The heme environment of these proteins was studied by optical spectroscopy and ligand-binding kinetics (e.g. CO association and O2 binding affinity) were measured for the two recombinant proteins and the native hemoglobin. This indicates that the CO association rate for AsHbC1D1 is higher than that of AsHbC1D5 and AfHb, while the calculated P50 value for AsHbC1D1 is lower than that of AsHbC1D5 and AfHb. The geminate and bimolecular rebinding parameters indicate a significant difference between both domains. Moreover, EPR results showed that the heme pocket in AfHb is in a more closed conformation than the heme pocket in myoglobin. Finally, the reduction potential of -0.13V versus the standard hydrogen electrode was determined for AfHb by direct electrochemical measurements. It is about 0.06V higher than the potential of the single domain AsHbC1D5. This work shows that each domain in the hemoglobin of Artemia has different characteristics of ligand binding.
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Affiliation(s)
- Heshmat Akbari Borhani
- School of Biology, College of Science, University of Tehran, Tehran, Iran; Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| | - Herald Berghmans
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| | | | - Karolien De Wael
- Department of Chemistry, University of Antwerp, Antwerp, Belgium.
| | - Angela Fago
- Department of Bioscience, Zoophysiology, Aarhus University, Aarhus, Denmark.
| | - Luc Moens
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
| | - Mehran Habibi-Rezaei
- School of Biology, College of Science, University of Tehran, Tehran, Iran; Nano-Biomedicine Center of Excellence, Nanoscience and Nanotechnology, Research Center, University of Tehran, Tehran, Iran.
| | - Sylvia Dewilde
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium.
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Ferroni FM, Marangon J, Neuman NI, Cristaldi JC, Brambilla SM, Guerrero SA, Rivas MG, Rizzi AC, Brondino CD. Pseudoazurin from Sinorhizobium meliloti as an electron donor to copper-containing nitrite reductase: influence of the redox partner on the reduction potentials of the enzyme copper centers. J Biol Inorg Chem 2014; 19:913-21. [DOI: 10.1007/s00775-014-1124-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 03/10/2014] [Indexed: 10/25/2022]
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5
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Reconstitution of supramolecular organization involved in energy metabolism at electrochemical interfaces for biosensing and bioenergy production. Anal Bioanal Chem 2013; 406:1011-27. [DOI: 10.1007/s00216-013-7465-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 10/01/2013] [Accepted: 10/25/2013] [Indexed: 12/26/2022]
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6
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Tai H, Tonegawa K, Shibata T, Hemmi H, Kobayashi N, Yamamoto Y. Inversion of the stereochemistry around the sulfur atom of the axial methionine side chain through alteration of amino acid side chain packing in Hydrogenobacter thermophilus cytochrome C552 and its functional consequences. Biochemistry 2013; 52:4800-9. [PMID: 23796250 DOI: 10.1021/bi4004028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In cytochrome c, the coordination of the axial Met Sδ atom to the heme Fe atom occurs in one of two distinctly different stereochemical manners, i.e., R and S configurations, depending upon which of the two lone pairs of the Sδ atom is involved in the bond; hence, the Fe-coordinated Sδ atom becomes a chiral center. In this study, we demonstrated that an alteration of amino acid side chain packing induced by the mutation of a single amino acid residue, i.e., the A73V mutation, in Hydrogenobacter thermophilus cytochrome c552 (HT) forces the inversion of the stereochemistry around the Sδ atom from the R configuration [Travaglini-Allocatelli, C., et al. (2005) J. Biol. Chem. 280, 25729-25734] to the S configuration. Functional comparison between the wild-type HT and the A73V mutant possessing the R and S configurations as to the stereochemistry around the Sδ atom, respectively, demonstrated that the redox potential (Em) of the mutant at pH 6.00 and 25 °C exhibited a positive shift of ∼20 mV relative to that of the wild-type HT, i.e., 245 mV, in an entropic manner. Because these two proteins have similar enthalpically stabilizing interactions, the difference in the entropic contribution to the Em value between them is likely to be due to the effect of the conformational alteration of the axial Met side chain associated with the inversion of the stereochemistry around the Sδ atom due to the effect of mutation on the internal mobility of the loop bearing the axial Met. Thus, the present study demonstrated that the internal mobility of the loop bearing the axial Met, relevant to entropic control of the redox function of the protein, is affected quite sensitively by the contextual stereochemical packing of amino acid side chains in the proximity of the axial Met.
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Affiliation(s)
- Hulin Tai
- Department of Chemistry, University of Tsukuba , Tsukuba 305-8571, Japan
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7
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Costa D, Garrain PA, Baaden M. Understanding small biomolecule-biomaterial interactions: A review of fundamental theoretical and experimental approaches for biomolecule interactions with inorganic surfaces. J Biomed Mater Res A 2012; 101:1210-22. [DOI: 10.1002/jbm.a.34416] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Revised: 08/07/2012] [Accepted: 08/12/2012] [Indexed: 12/13/2022]
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8
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Fine tuning of the redox function of Pseudomonas aeruginosa cytochrome c551 through structural properties of a polypeptide loop bearing an axial Met residue. J Inorg Biochem 2012; 108:182-7. [DOI: 10.1016/j.jinorgbio.2011.11.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 11/19/2011] [Accepted: 11/28/2011] [Indexed: 11/17/2022]
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9
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Comparative electrochemical study of superoxide reductases. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2011; 41:209-15. [PMID: 22143105 DOI: 10.1007/s00249-011-0777-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2011] [Revised: 10/29/2011] [Accepted: 11/21/2011] [Indexed: 10/15/2022]
Abstract
Superoxide reductases are involved in relevant biological electron transfer reactions related to protection against oxidative stress caused by reactive oxygen species. The electrochemical features of metalloproteins belonging to the three different classes of enzymes were studied by potentio-dynamic techniques (cyclic and square wave voltammetry): desulfoferrodoxin from Desulfovibrio vulgaris Hildenborough, class I superoxide reductases and neelaredoxin from Desulfovibrio gigas and Treponema pallidum, namely class II and III superoxide reductases, respectively. In addition, a small protein, designated desulforedoxin from D. gigas, which has high homology with the N-terminal domain of class I superoxide reductases, was also investigated. A comparison of the redox potentials and redox behavior of all the proteins is presented, and the results show that SOR center II is thermodynamically more stable than similar centers in different proteins, which may be related to an intramolecular electron transfer function.
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10
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Tai H, Irie K, Mikami SI, Yamamoto Y. Enhancement of the thermostability of Hydrogenobacter thermophilus cytochrome c(552) through introduction of an extra methylene group into its hydrophobic protein interior. Biochemistry 2011; 50:3161-9. [PMID: 21417336 DOI: 10.1021/bi200256d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Careful scrutiny of the protein interior of Hydrogenobacter thermophilus cytochrome c(552) (HT) on the basis of its X-ray structure [Travaglini-Allocatelli, C., Gianni, S., Dubey, V. K., Borgia, A., Di Matteo, A., Bonivento, D., Cutruzzola, F., Bren, K. L., and Brunori, M. (2005) J. Biol. Chem. 280, 25729-25734] indicated that a void space, which is large enough to accommodate a methyl group, exists in the hydrophobic protein interior near the heme. We tried to reduce the void space through the replacement of a Val by Ile or Leu (Val/Ile or Val/Leu mutation), and then the structural and functional consequences of these two mutations were characterized in order to elucidate the relationship between the nature of the packing of hydrophobic residues and the functional properties of the protein. The study demonstrated striking differences in the structural and functional consequences between the two mutations. The Val/Ile mutation was found to cause further enhancement of the thermostability of the oxidized HT, as reflected in the increase of the denaturation temperature (T(m)) value by ∼ 3 deg, whereas the thermostability of the reduced form was essentially unaffected. As a result, the redox potential (E(m)) of the Val/Ile mutant exhibited a negative shift of ∼ 50 mV relative to that of the wild-type protein in an enthalpic manner, this being consistent with our previous finding that a protein with higher stability in its oxidized form exhibits a lower E(m) value [Terui, N., Tachiiri, N., Matsuo, H., Hasegawa, J., Uchiyama, S., Kobayashi, Y., Igarashi, Y., Sambongi, Y., and Yamamoto, Y. (2003) J. Am. Chem. Soc. 125, 13650-13651]. In contrast, the Val/Leu mutation led to a decrease in thermostability of both the redox forms of the protein, as reflected in the decreases of the T(m) values of the oxidized and reduced proteins by ∼ 3 and ∼ 5 deg, respectively, and the E(m) value of the Val/Leu mutant happened to be similar to that of the Val/Ile one. The E(m) value of the Val/Leu mutant could be reasonably interpreted in terms of the different effects of the mutation on the stabilities of the two different redox forms of the protein. Thus, the present study demonstrated that the stability of the protein is affected quite sensitively by the contextual stereochemical packing of hydrophobic residues in the protein interior and that the structural properties of the hydrophobic core in the protein interior are crucial for control of the redox function of the protein. These findings provide novel insights as to functional control of a protein, which could be utilized for tuning of the T(m) and E(m) values of the protein by means of protein engineering.
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Affiliation(s)
- Hulin Tai
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
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11
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Simple construction of an enzymatic glucose biosensor based on a nanocomposite film prepared in one step from iron oxide, gold nanoparticles, and chitosan. Mikrochim Acta 2011. [DOI: 10.1007/s00604-011-0544-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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12
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Gopalan A, Lee KP, Komathi S. Bioelectrocatalytic determination of nitrite ions based on polyaniline grafted nanodiamond. Biosens Bioelectron 2010; 26:1638-43. [DOI: 10.1016/j.bios.2010.08.042] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 08/03/2010] [Accepted: 08/12/2010] [Indexed: 02/07/2023]
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13
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Xu JJ, Peng Y, Liu SQ, Chen HY. Direct electrochemistry of cytochrome c on EDTA-ZrO2 organic-inorganic hybrid film modified electrodes. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.20040221205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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14
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Tai H, Mikami SI, Irie K, Watanabe N, Shinohara N, Yamamoto Y. Role of a Highly Conserved Electrostatic Interaction on the Surface of Cytochrome c in Control of the Redox Function. Biochemistry 2009; 49:42-8. [DOI: 10.1021/bi901484b] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hulin Tai
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Shin-ichi Mikami
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Kiyofumi Irie
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Naoki Watanabe
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Naoya Shinohara
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
| | - Yasuhiko Yamamoto
- Department of Chemistry, University of Tsukuba, Tsukuba 305-8571, Japan
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15
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Electron transfer from cytochrome c to cupredoxins. J Biol Inorg Chem 2009; 14:821-8. [DOI: 10.1007/s00775-009-0494-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2008] [Accepted: 02/28/2009] [Indexed: 10/21/2022]
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16
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Zhou Y, Zhi J, Zou Y, Zhang W, Lee ST. Direct Electrochemistry and Electrocatalytic Activity of Cytochrome c Covalently Immobilized on a Boron-Doped Nanocrystalline Diamond Electrode. Anal Chem 2008; 80:4141-6. [DOI: 10.1021/ac702417x] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yanli Zhou
- Laboratory of Organic Optoelectric Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China, and Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
| | - Jinfang Zhi
- Laboratory of Organic Optoelectric Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China, and Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
| | - Yousheng Zou
- Laboratory of Organic Optoelectric Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China, and Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
| | - Wenjun Zhang
- Laboratory of Organic Optoelectric Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China, and Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
| | - Shuit-Tong Lee
- Laboratory of Organic Optoelectric Functional Materials and Molecular Engineering, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China, and Center of Super-Diamond and Advanced Films (COSDAF) and Department of Physics and Materials Science, City University of Hong Kong, Hong Kong SAR, China
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17
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Cordas CM, Moura I, Moura JJG. Direct electrochemical study of the multiple redox centers of hydrogenase from Desulfovibrio gigas. Bioelectrochemistry 2008; 74:83-9. [PMID: 18632311 DOI: 10.1016/j.bioelechem.2008.04.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2007] [Revised: 04/10/2008] [Accepted: 04/12/2008] [Indexed: 11/28/2022]
Abstract
Direct electrochemical response was first time observed for the redox centers of Desulfovibrio gigas [NiFe]-Hase, in non-turnover conditions, by cyclic voltammetry, in solution at glassy carbon electrode. The activation of the enzyme was achieved by reduction with H(2) and by electrochemical control and electrocatalytic activity was observed. The inactivation of the [NiFe]-Hase was also attained through potential control. All electrochemical data was obtained in the absence of enzyme inhibitors. The results are discussed in the context of the proposed mechanism currently accepted for activation/inactivation of [NiFe]-Hases.
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Affiliation(s)
- Cristina M Cordas
- REQUIMTE - Departamento de Química, CQFB, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2859-516 Monte de Caparica, Portugal
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18
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Benefits of membrane electrodes in the electrochemistry of metalloproteins: mediated catalysis of Paracoccus pantotrophus cytochrome c peroxidase by horse cytochrome c: a case study. J Biol Inorg Chem 2008; 13:779-87. [DOI: 10.1007/s00775-008-0365-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2007] [Accepted: 03/10/2008] [Indexed: 10/22/2022]
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19
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Takayama SIJ, Takahashi YT, Mikami SI, Irie K, Kawano S, Yamamoto Y, Hemmi H, Kitahara R, Yokoyama S, Akasaka K. Local Conformational Transition of Hydrogenobacter thermophilus Cytochrome c552 Relevant to Its Redox Potential,. Biochemistry 2007; 46:9215-24. [PMID: 17658890 DOI: 10.1021/bi7000714] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In order to elucidate the molecular mechanisms responsible for the apparent nonlinear behavior of the temperature dependence of the redox potential of Hydrogenobacter thermophilus cytochrome c552 [Takahashi, Y., Sasaki, H., Takayama, S. J., Mikami, S., Kawano, S., Mita, H., Sambongi, Y., and Yamamoto, Y. (2006) Biochemistry 45, 11005-11011], its heme active site structure has been characterized using variable-temperature and -pressure NMR techniques. The study revealed a temperature-dependent conformational transition between protein structures, which slightly differ in the conformation of the loop bearing the Fe-bound axial Met residue. The heme environment in the protein structure which arises at lower temperature was found to be more polar, as a result of the altered orientation of the loop with respect to the heme due to its conformational change, than that arising at higher temperature. The present study demonstrated the importance of the structural and dynamic properties of the polypeptide chain in close proximity to the heme for redox regulation of the protein.
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Tan F, Yan F, Ju H. Sensitive reagentless electrochemical immunosensor based on an ormosil sol–gel membrane for human chorionic gonadotrophin. Biosens Bioelectron 2007; 22:2945-51. [PMID: 17223029 DOI: 10.1016/j.bios.2006.12.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2006] [Revised: 11/03/2006] [Accepted: 12/05/2006] [Indexed: 11/26/2022]
Abstract
A new organically modified silicate (ormosil) material was synthesized as a matrix to encapsulate enzyme labeled antibody for preparation of immunosensors. The ormosil matrix was prepared by hydrolyzing tetraethyoxysilane and (3-aminopropyl)triethoxysilane in weak alkali solution. It possessed three-dimensional ordered nanoporous structure with high electrical conductivity and good mechanical stability. Its hydrophilicity provided a microenvironment for retaining the biological activity of the immobilized protein. Particularly, using horseradish peroxidase-labeled human chorionic gonadotrophin antibody (HRP-anti-hCG) as a model, the immobilized HRP showed direct electron transfer at about -35 mV with a rate constant of 15.8+/-3.8s(-1). By a simple one-step immunoreaction between human serum chorionic gonadotrophin (hCG) in sample solution and the immobilized HRP-anti-hCG, the differential pulse voltammetric peak current of HRP decreased linearly with an increasing hCG concentration from 0.5 to 50 mIU/ml with a relatively low limit of detection of 0.3 mIU/ml at 3sigma. Excellent analytical performance, fabrication reproducibility and operational stability of the proposed biosensor indicated its promising application in clinical diagnostics.
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Affiliation(s)
- Fang Tan
- Key Laboratory of Analytical Chemistry for Life Science (Education Ministry of China), Department of Chemistry, Nanjing University, Nanjing 210093, China
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21
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Liu YC, Zhao J, Wu WL, Yang ZS. Direct electrochemical behavior of cytochrome c on DNA modified glassy carbon electrode and its application to nitric oxide biosensor. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.01.026] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Yin Y, Wu P, Lü Y, Du P, Shi Y, Cai C. Immobilization and direct electrochemistry of cytochrome c at a single-walled carbon nanotube-modified electrode. J Solid State Electrochem 2006. [DOI: 10.1007/s10008-006-0160-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Takahashi YT, Takayama SIJ, Mikami SI, Mita H, Sambongi Y, Yamamoto Y. Influence of a Single Amide Group on the Redox Function ofPseudomonas aeruginosaCytochromec551. CHEM LETT 2006. [DOI: 10.1246/cl.2006.528] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Zhao S, Zhang K, Bai Y, Yang W, Sun C. Glucose oxidase/colloidal gold nanoparticles immobilized in Nafion film on glassy carbon electrode: Direct electron transfer and electrocatalysis. Bioelectrochemistry 2006; 69:158-63. [PMID: 16556513 DOI: 10.1016/j.bioelechem.2006.01.001] [Citation(s) in RCA: 170] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Revised: 11/11/2005] [Accepted: 01/16/2006] [Indexed: 11/18/2022]
Abstract
The direct electron transfer of glucose oxidase (GOD) was achieved based on the immobilization of GOD/colloidal gold nanoparticles on a glassy carbon electrode by a Nafion film. The immobilized GOD displayed a pair of well-defined and nearly reversible redox peaks with a formal potential (Eo ') of -0.434 V in 0.1 M pH 7.0 phosphate buffer solution and the response showed a surface-controlled electrode process. The dependence of Eo ' on solution pH indicated that the direct electron transfer reaction of GOD was a two-electron-transfer coupled with a two-proton-transfer reaction process. The experimental results also demonstrated that the immobilized GOD retained its electrocatalytic activity for the oxidation of glucose. So the resulting modified electrode can be used as a biosensor for detecting glucose.
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Affiliation(s)
- Shuang Zhao
- College of Chemistry, Jilin University, Changchun, 130012, PR China
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26
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Yan Y, Zheng W, Zhang M, Wang L, Su L, Mao L. Bioelectrochemically functional nanohybrids through co-assembling of proteins and surfactants onto carbon nanotubes: facilitated electron transfer of assembled proteins with enhanced faradic response. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2005; 21:6560-6. [PMID: 15982067 DOI: 10.1021/la050043z] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Preparation and bioelectrochemical properties of functional nanohybrids through co-assembling of hemeproteins (i.e., horseradish peroxidase, hemoglobin, myoglobin and cytochrome c) and surfactants onto carbon nanotubes (CNTs) are described. The prepared protein-surfactant-CNT nanohybrids are found to possess facilitated interfacial electron transfer of the proteins with enhanced faradic responses. The enhancements are ascribed for the first time to the properties of the surfactants for facilitation of protein electrochemistry and the improved portion of electroactive proteins assembled, of which the latter assignment is closely associated with the electrochemical and structural properties of the nanotubes and the three-dimensional architecture of the CNT film confined onto the glassy carbon electrode. It is proposed that the single and/or small bundles of the nanotubes in the CNT film electrode can be rationally functionalized with surfactants to be functional nanoelectrodes capable of facilitating electron transfer of proteins. The three-dimensional confinement of these functional nanowires onto the GC electrode essentially increases the portion of electroactive proteins assembled in the nanohybrids. These properties of the protein-surfactant-CNT nanohybrids, combined with the bioelectrochemical catalytic activity, could make them useful for development of bioelectronic devices and investigation of protein electrochemistry at functional interfaces.
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Affiliation(s)
- Yiming Yan
- Center for Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
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Sosa AM, Ugalde-Saldı́var VM, González I, Gasque L. Electrochemical studies of a dinuclear copper complex with imidazole derivative ligand H3bphenim. J Electroanal Chem (Lausanne) 2005. [DOI: 10.1016/j.jelechem.2004.12.043] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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McKenzie KJ, Marken F, Opallo M. TiO2 phytate films as hosts and conduits for cytochrome c electrochemistry. Bioelectrochemistry 2005; 66:41-7. [PMID: 15833701 DOI: 10.1016/j.bioelechem.2004.03.008] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2003] [Revised: 03/24/2004] [Accepted: 03/31/2004] [Indexed: 11/22/2022]
Abstract
Cytochrome c is accumulated into a film of TiO(2) nanoparticles and phytate by adsorption from an aqueous solution into the mesoporous structure. Stable voltammetric responses and high concentrations of redox protein within the TiO(2) phytate layer can be achieved. Two types of electrode systems are reported with (i) the modified TiO(2) phytate film between electrode and aqueous solution phase and (ii) the modified TiO(2) phytate film buried under a porous gold electrode ('porotrode'). The electrical conductivity of TiO(2) phytate films is measured and compared in the dry and in the wet state. Although in the dry state essentially insulating, the TiO(2) phytate film turns into an electrical conductor (with approximately 4 Omega cm specific resistivity assuming ohmic behaviour) when immersed in aqueous 0.1 M phosphate buffer solution at pH 7. The redox protein cytochrome c is therefore directly connected to the electrode via diffusion and migration of electrons in the three dimensional mesoporous TiO(2) phytate host structure. Electron transfer from cytochrome c to TiO(2) is proposed to be the rate-determining step for this conduction mechanism.
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Affiliation(s)
- Katy J McKenzie
- Department of Chemistry, Loughborough University, Loughborough, Leicestershire LE11 3TU, UK
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Correia dos Santos M, Paes de Sousa P, Simões Gonçalves M, Krippahl L, Moura J, Lojou É, Bianco P. Electrochemical studies on small electron transfer proteins using membrane electrodes. J Electroanal Chem (Lausanne) 2003. [DOI: 10.1016/s0022-0728(02)01427-4] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Chen SM, Chen SV. The bioelectrocatalytic properties of cytochrome C by direct electrochemistry on DNA film modified electrode. Electrochim Acta 2003. [DOI: 10.1016/s0013-4686(02)00719-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Lojou É, Pieulle L, Guerlesquin F, Bianco P. From the protein–polypeptide model system to the interaction between physiological partners using electrochemistry. J Electroanal Chem (Lausanne) 2002. [DOI: 10.1016/s0022-0728(02)00743-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ju H, Liu S, Ge B, Lisdat F, Scheller F. Electrochemistry of Cytochrome c Immobilized on Colloidal Gold Modified Carbon Paste Electrodes and Its Electrocatalytic Activity. ELECTROANAL 2002. [DOI: 10.1002/1521-4109(200201)14:2<141::aid-elan141>3.0.co;2-y] [Citation(s) in RCA: 136] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ju H, Liu S, Ge B, Lisdat F, Scheller F. Electrochemistry of Cytochrome c Immobilized on Colloidal Gold Modified Carbon Paste Electrodes and Its Electrocatalytic Activity. ELECTROANAL 2002. [DOI: 10.1002/1521-4109(200201)14:2%3c141::aid-elan141%3e3.0.co;2-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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