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Kim DH, Ringe S, Kim H, Kim S, Kim B, Bae G, Oh HS, Jaouen F, Kim W, Kim H, Choi CH. Selective electrochemical reduction of nitric oxide to hydroxylamine by atomically dispersed iron catalyst. Nat Commun 2021; 12:1856. [PMID: 33767159 PMCID: PMC7994811 DOI: 10.1038/s41467-021-22147-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Accepted: 02/19/2021] [Indexed: 12/03/2022] Open
Abstract
Electrocatalytic conversion of nitrogen oxides to value-added chemicals is a promising strategy for mitigating the human-caused unbalance of the global nitrogen-cycle, but controlling product selectivity remains a great challenge. Here we show iron-nitrogen-doped carbon as an efficient and durable electrocatalyst for selective nitric oxide reduction into hydroxylamine. Using in operando spectroscopic techniques, the catalytic site is identified as isolated ferrous moieties, at which the rate for hydroxylamine production increases in a super-Nernstian way upon pH decrease. Computational multiscale modelling attributes the origin of unconventional pH dependence to the redox active (non-innocent) property of NO. This makes the rate-limiting NO adsorbate state more sensitive to surface charge which varies with the pH-dependent overpotential. Guided by these fundamental insights, we achieve a Faradaic efficiency of 71% and an unprecedented production rate of 215 μmol cm-2 h-1 at a short-circuit mode in a flow-type fuel cell without significant catalytic deactivation over 50 h operation.
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Affiliation(s)
- Dong Hyun Kim
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Stefan Ringe
- Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science and Technology, Daegu, Republic of Korea
| | - Haesol Kim
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Sejun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea
| | - Bupmo Kim
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang, Republic of Korea
| | - Geunsu Bae
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea
| | - Hyung-Suk Oh
- Clean Energy Research Center, Korea Institute of Science and Technology, Seoul, Republic of Korea
| | - Frédéric Jaouen
- ICGM, Université de Montpellier, CNRS, ENSCM, Montpellier, France
| | - Wooyul Kim
- Department of Chemical and Biological Engineering, Sookmyung Women's University, Seoul, Republic of Korea.
| | - Hyungjun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon, Republic of Korea.
| | - Chang Hyuck Choi
- School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, Republic of Korea.
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He Z, Deng H, Wang Q, Li Y, Liang X, Liu D, Wu Y. Electrochemical and spectroscopic characteristics of cytochrome P450 55A3 and its interaction with nitric oxide. Int J Biol Macromol 2020; 167:1406-1413. [PMID: 33202279 DOI: 10.1016/j.ijbiomac.2020.11.094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Revised: 08/17/2020] [Accepted: 11/12/2020] [Indexed: 11/30/2022]
Abstract
Cytochrome P450 55A3 (CYP55A3) is an enzyme with the catalytic activity of nitric oxide (NO) to nitrous oxide using NADH or NADPH as the electron donor. Herein CYP55A3 has been expressed in E. coli and purified by His-tag columns. The electrochemical and spectroscopic characteristic of CYP55A3 and its interaction with NO has been studied. The direct electrochemistry of Fe3+/Fe2+ redox peaks in CYP55A3 was realized on the pyrolitic graphite electrode with the redox potential of -475 mV in pH 7.0 phosphate buffer. With the addition of NO a ferric nitroxyl complex (Fe3+-NO) formed with a new reduction peak at -0.78 V. The reduction peak current increased with the concentration of NO and showed typical Michaelis-Menten kinetic characteristics with the apparent Michaelis constant Kmapp 9.78 μM. The binding constant K calculated to be 3.93 × 104 M by UV-vis method. The fluorescence emission spectra of iron porphyrin in CYP55A3 showed with the peak wavelength 633 nm, and its fluorescence intensity increased after binding with NO. The fluorescence analysis demonstrated that NADH can relay electrons to iron porphyrin and reduce NO. The reductive product of NO released and the iron porphyrin in CYP55A3 turned back to the original form.
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Affiliation(s)
- Zheng He
- College of Life Science, South Central University for Nationalities, Wuhan 430074, PR China
| | - Huan Deng
- College of Life Science, South Central University for Nationalities, Wuhan 430074, PR China
| | - Qiang Wang
- College of Pharmacy, South Central University for Nationalities, Wuhan 430074, PR China
| | - Yong Li
- College of Life Science, South Central University for Nationalities, Wuhan 430074, PR China
| | - Xiaosheng Liang
- College of Life Science, South Central University for Nationalities, Wuhan 430074, PR China
| | - Deli Liu
- College of Life Science, Central China Normal University, Wuhan 430079, PR China
| | - Yunhua Wu
- College of Life Science, South Central University for Nationalities, Wuhan 430074, PR China.
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Musameh MM, Dunn CJ, Uddin MH, Sutherland TD, Rapson TD. Silk provides a new avenue for third generation biosensors: Sensitive, selective and stable electrochemical detection of nitric oxide. Biosens Bioelectron 2018; 103:26-31. [DOI: 10.1016/j.bios.2017.12.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2017] [Revised: 11/30/2017] [Accepted: 12/13/2017] [Indexed: 01/05/2023]
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Preimesberger MR, Johnson EA, Nye DB, Lecomte JTJ. Covalent attachment of the heme to Synechococcus hemoglobin alters its reactivity toward nitric oxide. J Inorg Biochem 2017; 177:171-182. [PMID: 28968520 DOI: 10.1016/j.jinorgbio.2017.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Revised: 09/18/2017] [Accepted: 09/19/2017] [Indexed: 01/19/2023]
Abstract
The cyanobacterium Synechococcus sp. PCC 7002 produces a monomeric hemoglobin (GlbN) implicated in the detoxification of reactive nitrogen and oxygen species. GlbN contains a b heme, which can be modified under certain reducing conditions. The modified protein (GlbN-A) has one heme-histidine C-N linkage similar to the C-S linkage of cytochrome c. No clear functional role has been assigned to this modification. Here, optical absorbance and NMR spectroscopies were used to compare the reactivity of GlbN and GlbN-A toward nitric oxide (NO). Both forms of the protein are capable of NO dioxygenase activity and both undergo heme bleaching after multiple NO challenges. GlbN and GlbN-A bind NO in the ferric state and form diamagnetic complexes (FeIII-NO) that resist reductive nitrosylation to the paramagnetic FeII-NO forms. Dithionite reduction of FeIII-NO GlbN and GlbN-A, however, resulted in distinct outcomes. Whereas GlbN-A rapidly formed the expected FeII-NO complex, NO binding to FeII GlbN caused immediate heme loss and, remarkably, was followed by slow heme rebinding and HNO (nitrosyl hydride) production. Additionally, combining FeIII GlbN, 15N-labeled nitrite, and excess dithionite resulted in the formation of FeII-H15NO GlbN. Dithionite-mediated HNO production was also observed for the related GlbN from Synechocystis sp. PCC 6803. Although ferrous GlbN-A appeared capable of trapping preformed HNO, the histidine-heme post-translational modification extinguished the NO reduction chemistry associated with GlbN. Overall, the results suggest a role for the covalent modification in FeII GlbNs: protection from NO-mediated heme loss and prevention of HNO formation.
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Affiliation(s)
| | - Eric A Johnson
- T.C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Dillon B Nye
- T.C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA
| | - Juliette T J Lecomte
- T.C. Jenkins Department of Biophysics, Johns Hopkins University, Baltimore, MD 21218, USA.
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5
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Varmira K, Abdi O, Gholivand MB, Goicoechea HC, Jalalvand AR. Intellectual modifying a bare glassy carbon electrode to fabricate a novel and ultrasensitive electrochemical biosensor: Application to determination of acrylamide in food samples. Talanta 2017; 176:509-517. [PMID: 28917783 DOI: 10.1016/j.talanta.2017.08.069] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 08/19/2017] [Accepted: 08/21/2017] [Indexed: 11/28/2022]
Abstract
Acrylamide (AA) is a neurotoxin and carcinogen which is mainly formed in foods containing large quantities of starch processed at high temperatures and its determination is very important to control the quality of foods. In this work, a novel electrochemical biosensor based on hemoglobin-dimethyldioctadecylammonium bromide (HG-DDAB)/platinum-gold-palladium three metallic alloy nanoparticles (PtAuPd NPs)/chitosan-1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (Ch-IL)/multiwalled carbon nanotubes-IL (MWCNTs-IL)/glassy carbon electrode (GCE) is proposed for ultrasensitive determination of AA in food samples. Development of the biosensor is based on forming an adduct by the reaction of AA with α-NH2 group of N-terminal valine of HG which decreases the peak current of HG-Fe+3 reduction. The modifications were characterized by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), energy dispersive X-ray spectroscopic (EDS) and scanning electron microscopy (SEM). Under optimized conditions, the biosensor detected AA by square wave voltammetry (SWV) in two linear concentration ranges of 0.03-39.0nM and 39.0-150.0nM with a limit of detection (LOD) of 0.01nM. The biosensor was able to selective detection of AA even in the presence of high concentrations of common interferents which confirmed that the biosensor is highly selective. Also, the results obtained from further studies confirmed that the proposed biosensor has a short response time (less than 8s), good sensitivity, long term stability, repeatability, and reproducibility. Finally, the proposed biosensor was successfully applied to determine AA in potato chips and its results were comparable to those obtained by gas chromatography-mass spectrometry (GC-MS) as reference method.
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Affiliation(s)
- Kambiz Varmira
- Research Center of Oils and Fats (RCOF), Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Omid Abdi
- Research Center of Oils and Fats (RCOF), Kermanshah University of Medical Sciences, Kermanshah, Iran
| | | | - Hector C Goicoechea
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), C_atedra de Química Analítica I, Universidad Nacional del Litoral, Ciudad Universitaria, CC ,242 (S3000ZAA), Santa Fe, Argentina
| | - Ali R Jalalvand
- Research Center of Oils and Fats (RCOF), Kermanshah University of Medical Sciences, Kermanshah, Iran.
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6
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Laftsoglou T, Jeuken LJC. Supramolecular electrode assemblies for bioelectrochemistry. Chem Commun (Camb) 2017; 53:3801-3809. [PMID: 28317998 PMCID: PMC5436043 DOI: 10.1039/c7cc01154g] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Accepted: 03/14/2017] [Indexed: 12/03/2022]
Abstract
For more than three decades, the field of bioelectrochemistry has provided novel insights into the catalytic mechanisms of enzymes, the principles that govern biological electron transfer, and has elucidated the basic principles for bioelectrocatalytic systems. Progress in biochemistry, bionanotechnology, and our ever increasing ability to control the chemistry and structure of electrode surfaces has enabled the study of ever more complex systems with bioelectrochemistry. This feature article highlights developments over the last decade, where supramolecular approaches have been employed to develop electrode assemblies that increase enzyme loading on the electrode or create more biocompatible environments for membrane enzymes. Two approaches are particularly highlighted: the use of layer-by-layer assembly, and the modification of electrodes with planar lipid membranes.
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Affiliation(s)
- Theodoros Laftsoglou
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT, Leeds, UK.
| | - Lars J C Jeuken
- School of Biomedical Sciences and Astbury Centre for Structural Molecular Biology, University of Leeds, LS2 9JT, Leeds, UK.
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7
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Liu Z, Peng C, Wang Y, Pei M, Zhang G. A fluorescent sensor for Zn2+ and NO2− based on the rational control of CN isomerization. Org Biomol Chem 2016; 14:4260-6. [DOI: 10.1039/c6ob00476h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
L could be used as a fluorescent sensor towards Zn2+ and NO2− based on the control of CN isomerization.
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Affiliation(s)
- Zheng Liu
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Cuina Peng
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Ying Wang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Meishan Pei
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
| | - Guangyou Zhang
- School of Chemistry and Chemical Engineering
- University of Jinan
- Jinan 250022
- China
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8
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Gao Y, Toubaei A, Kong X, Wu G. Acidity and Hydrogen Exchange Dynamics of Iron(II)-Bound Nitroxyl in Aqueous Solution. Angew Chem Int Ed Engl 2014; 53:11547-51. [DOI: 10.1002/anie.201407018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 08/13/2013] [Indexed: 11/10/2022]
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9
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Gao Y, Toubaei A, Kong X, Wu G. Acidity and Hydrogen Exchange Dynamics of Iron(II)-Bound Nitroxyl in Aqueous Solution. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201407018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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10
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Li F, Nie M, He X, Fei J, Ding Y, Feng B. Direct electrochemistry and electrocatalysis of hemoglobin on a glassy carbon electrode modified with poly(ethylene glycol diglycidyl ether) and gold nanoparticles on a quaternized cellulose support. A sensor for hydrogen peroxide and nitric oxide. Mikrochim Acta 2014. [DOI: 10.1007/s00604-014-1228-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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11
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Xu T, Scafa N, Xu LP, Su L, Li C, Zhou S, Liu Y, Zhang X. Electrochemical Sensors for Nitric Oxide Detection in Biological Applications. ELECTROANAL 2014. [DOI: 10.1002/elan.201300564] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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12
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Dong SS, Du KJ, You Y, Liu F, Wen GB, Lin YW. Peroxidase-like activity of L29H myoglobin with two cooperative distal histidines on electrode using O2 as an oxidant. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.09.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Sanders BC, Patra AK, Harrop TC. Synthesis, properties, and reactivity of a series of non-heme {FeNO}7/8 complexes: Implications for Fe-nitroxyl coordination. J Inorg Biochem 2013; 118:115-27. [DOI: 10.1016/j.jinorgbio.2012.08.026] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Revised: 08/17/2012] [Accepted: 08/18/2012] [Indexed: 10/27/2022]
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14
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Sanders BC, Rhine MA, Harrop TC. Properties of {FeNO}8 and {CoNO}9 Metal Nitrosyls in Relation to Nitroxyl Coordination Chemistry. MOLECULAR DESIGN IN INORGANIC BIOCHEMISTRY 2013. [DOI: 10.1007/430_2012_87] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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15
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Lehnert N, Scheidt WR, Wolf MW. Structure and Bonding in Heme–Nitrosyl Complexes and Implications for Biology. NITROSYL COMPLEXES IN INORGANIC CHEMISTRY, BIOCHEMISTRY AND MEDICINE II 2013. [DOI: 10.1007/430_2013_92] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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16
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Zapata AL, Kumar MR, Pervitsky D, Farmer PJ. A singular value decomposition approach for kinetic analysis of reactions of HNO with myoglobin. J Inorg Biochem 2012; 118:171-8. [PMID: 23140900 DOI: 10.1016/j.jinorgbio.2012.10.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2012] [Revised: 10/03/2012] [Accepted: 10/04/2012] [Indexed: 12/01/2022]
Abstract
The reactions of several horse heart myoglobin species with nitrosyl hydride, HNO, derived from Angeli's salt (AS) and Piloty's acid (PA) have been followed by UV-visible, (1)H NMR and EPR spectroscopies. Spectral analysis of myoglobin-derived speciation during the reactions was obtained by using singular value decomposition methods combined with a global analysis to obtain the rate constants of complex sequential reactions. The analysis also provided spectra for the derived absorbers, which allowed self-consistent calibration to the spectra of known myoglobin species. Using this method, the determined rate for trapping of HNO by metmyoglobin, which produces NO-myoglobin, is found to be 2.7 × 10(5)M(-1)s(-1) at pH7.0 and 1.1 × 10(5)M(-1)s(-1) at pH9.4. The reaction of deoxymyoglobin with HNO generates the adduct HNO-myoglobin directly, but is followed by a secondary reaction of that product with HNO yielding NO-myoglobin; the determined bimolecular rate constants for these reactions are 3.7 × 10(5)M(-1)s(-1) and 1.67 × 10(4)M(-1)s(-1) respectively, and are independent of pH. The derived spectrum for HNO-myoglobin is characterized by a Soret absorbance maximum at 423 nm with an extinction coefficient of 1.66 × 10(5)M(-1)cm(-1). The rate constant for unimolecular loss of HNO from HNO-myoglobin was determined by competitive trapping with CO at 8.9 × 10(-5)s(-1), which gives the thermodynamic binding affinity of HNO to deoxymyoglobin as 4.2 × 10(9)M(-1). These results suggest that the formation of HNO-ferrous heme protein adducts represents an important consideration in the biological action of HNO-releasing drugs.
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Affiliation(s)
- Adrian L Zapata
- Department of Chemistry and Biochemistry, Baylor University, Waco, TX 76796, USA
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17
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Wu H, Fan S, Zhu W, Dai Z, Zou X. Investigation of electrocatalytic pathway for hemoglobin toward nitric oxide by electrochemical approach based on protein controllable unfolding and in-situ reaction. Biosens Bioelectron 2012; 41:589-94. [PMID: 23079342 DOI: 10.1016/j.bios.2012.09.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 09/15/2012] [Accepted: 09/20/2012] [Indexed: 11/29/2022]
Abstract
An electrochemical approach based on protein controllable unfolding was developed and applied in combination with in-situ reaction in order to investigate the electrocatalytic pathway for hemoglobin (Hb) toward nitric oxide (NO). Hb was entrapped in a dimethyldidodecylammonium bromide (DDAB) film modified glassy carbon electrode (DDAB/Hb/GCE). Two typical denaturants of acid and urea were synergistically utilized to control the incorporated Hb to a most unfolded state without losing heme groups. Under optimal conditions, the unfolded DDAB/Hb/GCE exhibited accelerated direct electron transfer. The sensitivities for the detection of ascorbic acid (AA), NaNO(2) and NO were improved as 3, 10 and 12 times higher than those on the native DDAB/Hb/GCE, and the limits of detection (LODs) for AA, NaNO(2) and NO were down to 0.33, 0.83 and 0.063 μM, respectively. The unfolded DDAB/Hb/GCE was further applied for the investigation of Hb-NO interaction in NaNO(2) solution. With successive additions of AA, NO was generated in situ on DDAB/Hb/GCE. A new reduction peak of the intermediate HbFe(II)-HN(2)O(2) was successfully revealed near -0.65 V. The whole electrocatalytic mechanism was proposed and verified by density functional theory. The method can be a promising platform for facile study of the interaction between NO and heme proteins.
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Affiliation(s)
- Hai Wu
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China
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18
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Physiological function and catalytic versatility of bacterial multihaem cytochromes c involved in nitrogen and sulfur cycling. Biochem Soc Trans 2012; 39:1864-70. [PMID: 22103541 DOI: 10.1042/bst20110713] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Bacterial MCCs (multihaem cytochromes c) represent widespread respiratory electron-transfer proteins. In addition, some of them convert substrates such as nitrite, hydroxylamine, nitric oxide, hydrazine, sulfite, thiosulfate or hydrogen peroxide. In many cases, only a single function is assigned to a specific MCC in database entries despite the fact that an MCC may accept various substrates, thus making it a multifunctional catalyst that can play diverse physiological roles in bacterial respiration, detoxification and stress defence mechanisms. The present article briefly reviews the structure, function and biogenesis of selected MCCs that catalyse key reactions in the biogeochemical nitrogen and sulfur cycles.
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Yue R, Lu Q, Zhou Y. A novel nitrite biosensor based on single-layer graphene nanoplatelet-protein composite film. Biosens Bioelectron 2011; 26:4436-41. [PMID: 21612908 DOI: 10.1016/j.bios.2011.04.059] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 03/18/2011] [Accepted: 04/29/2011] [Indexed: 10/18/2022]
Abstract
A novel nitrite biosensor was developed through a sensing platform consisted of single-layer graphene nanoplatelet (SLGnP)-protein composite film. SLGnP with the virtues of excellent biocompatibility, conductivity and high sensitivity to the local perturbations can provide a biocompatible microenvironment for protein immobilization and a suitable electron transfer distance between electroactive centers of heme protein and electrode surface. A pair of well-defined and quasi-reversible cyclic voltammetric peaks that reflected the direct electrochemistry for ferric/ferrous couple of myoglobin (Mb) was achieved at the composite film modified electrode. Field emission scanning electron microscopy (FESEM) and ultraviolet visible spectra (UV-vis) were utilized to characterize the composite film. The results demonstrated that the morphology of the composite film was unique and the protein in the composite film retained its secondary structure similar to the native state. The composite film also displayed excellent electrocatalytic ability for the reduction of nitric oxide, which was applied to determine nitrite indirectly. It exhibited good electrochemical response to nitrite with a linear range from 0.05 to 2.5 mM and a detection limit of 0.01 mM.
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Affiliation(s)
- Rong Yue
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, PR China
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20
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Almeida MG, Serra A, Silveira CM, Moura JJ. Nitrite biosensing via selective enzymes--a long but promising route. SENSORS (BASEL, SWITZERLAND) 2010; 10:11530-55. [PMID: 22163541 PMCID: PMC3231041 DOI: 10.3390/s101211530] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2010] [Revised: 11/19/2010] [Accepted: 12/06/2010] [Indexed: 12/21/2022]
Abstract
The last decades have witnessed a steady increase of the social and political awareness for the need of monitoring and controlling environmental and industrial processes. In the case of nitrite ion, due to its potential toxicity for human health, the European Union has recently implemented a number of rules to restrict its level in drinking waters and food products. Although several analytical protocols have been proposed for nitrite quantification, none of them enable a reliable and quick analysis of complex samples. An alternative approach relies on the construction of biosensing devices using stable enzymes, with both high activity and specificity for nitrite. In this paper we review the current state-of-the-art in the field of electrochemical and optical biosensors using nitrite reducing enzymes as biorecognition elements and discuss the opportunities and challenges in this emerging market.
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Affiliation(s)
- M. Gabriela Almeida
- REQUIMTE—Departmento de Química, Faculdade de Ciencias e Tecnologia (UNL), 2829-516 Monte Caparica, Portugal; E-Mails: (A.S.); (C.M.S.); (J.J.G.M.)
- Escola Superior de Saude Egas Moniz, Campus Universitario, Quinta da Granja, 2829-511 Monte Caparica, Portugal
| | - Alexandra Serra
- REQUIMTE—Departmento de Química, Faculdade de Ciencias e Tecnologia (UNL), 2829-516 Monte Caparica, Portugal; E-Mails: (A.S.); (C.M.S.); (J.J.G.M.)
| | - Celia M. Silveira
- REQUIMTE—Departmento de Química, Faculdade de Ciencias e Tecnologia (UNL), 2829-516 Monte Caparica, Portugal; E-Mails: (A.S.); (C.M.S.); (J.J.G.M.)
| | - Jose J.G. Moura
- REQUIMTE—Departmento de Química, Faculdade de Ciencias e Tecnologia (UNL), 2829-516 Monte Caparica, Portugal; E-Mails: (A.S.); (C.M.S.); (J.J.G.M.)
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21
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Kumar MR, Fukuto JM, Miranda KM, Farmer PJ. Reactions of HNO with heme proteins: new routes to HNO-heme complexes and insight into physiological effects. Inorg Chem 2010; 49:6283-92. [PMID: 20666387 DOI: 10.1021/ic902319d] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The formation and interconversion of nitrogen oxides has been of interest in numerous contexts for decades. Early studies focused on gas-phase reactions, particularly with regard to industrial and atmospheric environments, and on nitrogen fixation. Additionally, investigation of the coordination chemistry of nitric oxide (NO) with hemoglobin dates back nearly a century. With the discovery in the early 1980s that NO is biosynthesized as a molecular signaling agent, the literature has been focused on the biological effects of nitrogen oxides, but the original concerns remain relevant. For instance, hemoglobin has long been known to react with nitrite, but this reductase activity has recently been considered to be important to produce NO under hypoxic conditions. The association of nitrosyl hydride (HNO; also commonly referred to as nitroxyl) with heme proteins can also produce NO by reductive nitrosylation. Furthermore, HNO is considered to be an intermediate in bacterial denitrification, but conclusive identification has been elusive. The authors of this article have approached the bioinorganic chemistry of HNO from different perspectives, which have converged because heme proteins are important biological targets of HNO.
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Affiliation(s)
- Murugaeson R Kumar
- Department of Chemistry and Biochemistry, Baylor University, Waco, Texas 76706, USA
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Farmer PJ, Kumar MR, Almaraz E. THE COORDINATION CHEMISTRY OF HNO: FROM WARREN ROPER TO HEMOGLOBIN. COMMENT INORG CHEM 2010. [DOI: 10.1080/02603594.2010.520257] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Duca M, Khamseh S, Lai SCS, Koper MTM. The influence of solution-phase HNO2 decomposition on the electrocatalytic nitrite reduction at a hemin-pyrolitic graphite electrode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:12418-12424. [PMID: 20415442 DOI: 10.1021/la101172f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The mechanism of nitrite electroreduction by hemin adsorbed at pyrolitic graphite is investigated. Two main issues are addressed: the effect of the medium pH and the selectivity of the reaction, which was determined by the combined use of the rotating ring disk electrode (RRDE) and online electrochemical mass spectroscopy (OLEMS). In acidic media, the behavior observed is indicative of the presence of NO, as the main reactant, generated from the solution-phase decomposition of HNO(2). Reduction of the NO-heme complex shows a Tafel slope of 59 mV/dec(-1) and a pH dependence of 42 mV/pH, indicative of a so-called EC mechanism. In acidic media, HNO(2) and NO are reduced to hydroxylamine (NH(2)OH) with almost 100% selectivity at low potentials, nitrous oxide (N(2)O) being only a minor side product. In neutral media, the hemin is largely unresponsive to the presence of nitrite, giving only a very small reduction current. The comparison of our simple heme catalyst to the behavior of the naturally occurring heme-containing nitrite reductases, which operate under biological conditions, suggests that these enzymes dissociate nitrite at neutral pH either via a complexation step favored by a specific ligating environment or by locally regulating the pH to induce HNO(2) dissociation.
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Affiliation(s)
- Matteo Duca
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
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Affiliation(s)
- Peter C. Ford
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93110-9510
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Lee CY, Bond AM. A comparison of the higher order harmonic components derived from large-amplitude Fourier transformed ac voltammetry of myoglobin and heme in DDAB films at a pyrolytic graphite electrode. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5243-5253. [PMID: 20232815 DOI: 10.1021/la903387n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A debate as to whether heme remains bound or is released in myoglobin molecules incorporated into a didodecyldimethylammonium bromide (DDAB) film adhered to a pyrolytic graphite electrode has prompted a comparison of their electrochemistry by the highly sensitive large-amplitude Fourier transformed ac voltammetric method. The accessibility of third, fourth, and higher harmonic components that are devoid of background current and the enhanced resolution relative to that available in dc voltammetry have allowed a detailed comparison of the Fe(III)/Fe(II) and Fe(II)/Fe(I) redox processes of myoglobin and heme molecules to be undertaken as a function of buffer composition and pH and in the presence and absence of NaBr in the buffer and/or film. Under most conditions examined, only very subtle differences, in the Fe(III)/Fe(II) process were found, implying this process cannot be used to indicate the intactness or otherwise of myoglobin in myoglobin-DDAB films. In contrast, higher order ac harmonics obtained from myoglobin-DDAB and heme-DDAB films reveal pH dependent differences with respect to the Fe(II)/Fe(I) couple. Analysis of the ac harmonics, and with the hypothesis that the Fe(II)/Fe(I) process reflects the myoglobin state, suggests that the majority of the iron heme is released from myoglobin-DDAB (pH 5.0, no NaBr) films in contact with pH 5.0 (0.1 M sodium acetate) buffer solution devoid of or containing NaBr. However, myoglobin films prepared with pH 5.0 buffer containing NaBr shows significant difference in the higher harmonic shapes and midpoint potentials in the Fe(II)/Fe(I) process relative to the case when heme molecules are used, although as noted in other studies, a significant fraction of the Mb is rendered electroinactive in the presence of NaBr. The voltammetric responses of myoglobin and heme-DDAB (pH 5.0) films in contact with pH 7.0 (0.1 M) phosphate buffer solution also exhibit significant differences in the Fe(II)/Fe(I) redox couple in the higher harmonics in contrast to a report [de Groot, M.T.; Merkx, M.; Koper, M. T. M. J. Am. Chem. Soc. 2005, 127, 16224] that claimed identical midpoint potentials apply to both films under conditions of dc cyclic voltammetry. The FT-ac voltammetric data therefore suggest that a substantial fraction of myoglobin in myoglobin-DDAB (pH 5.0) films in contact with pH 7.0 phosphate buffer solution remains intact. No evidence of a catalytic effect that enhanced the released of heme from myoglobin was found at the pyrolytic graphite electrode surface. In summary, higher harmonic ac voltammetric data indicate that the Fe(II)/Fe(I) process but not the Fe(III)/Fe(II) reflects the state of myoglobin in DDAB films. On this basis, films prepared at pH 5.0 should include NaBr, or else films should be prepared at neutral pH to achieve films with myoglobin remains in its intact near native state when a myoglobin-DDAB film is confined to a graphite electrode surface. Otherwise, the release of heme in myoglobin molecules incorporated into a DDAB film is likely to be a dominant reaction pathway.
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Affiliation(s)
- Chong-Yong Lee
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
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26
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Direct electrochemistry and electrocatalysis of heme-proteins immobilized in porous carbon nanofiber/room-temperature ionic liquid composite film. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.12.101] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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An electrochemical biosensor based on Nafion-ionic liquid and a myoglobin-modified carbon paste electrode. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.11.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Isoda N, Yokoyama H, Nojiri M, Suzuki S, Yamaguchi K. Electroreduction of nitrite to nitrogen oxide by a copper-containing nitrite reductase model complex incorporated into collagen film. Bioelectrochemistry 2010; 77:82-8. [DOI: 10.1016/j.bioelechem.2009.06.013] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2009] [Revised: 06/23/2009] [Accepted: 06/30/2009] [Indexed: 10/20/2022]
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George S, Lee HK. Direct Electrochemistry and Electrocatalysis of Hemoglobin in Nafion/Carbon Nanochip Film on Glassy Carbon Electrode. J Phys Chem B 2009; 113:15445-54. [DOI: 10.1021/jp905690a] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sini George
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Hian Kee Lee
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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Affiliation(s)
- Victor Rosca
- Leiden Institute of Chemistry, Leiden University, PO Box 9502, 2300 RA Leiden, The Netherlands
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Kumar MR, Pervitsky D, Chen L, Poulos T, Kundu S, Hargrove MS, Rivera EJ, Diaz A, Colón JL, Farmer PJ. Nitrosyl hydride (HNO) as an O2 analogue: long-lived HNO adducts of ferrous globins. Biochemistry 2009; 48:5018-25. [PMID: 19368336 DOI: 10.1021/bi900122r] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Nitrosyl hydride, HNO or nitroxyl, is the one-electron reduced and protonated form of nitric oxide. HNO is isoelectronic to singlet O(2), and we have previously reported that deoxymyoglobin traps free HNO to form a stable adduct. In this report, we demonstrate that oxygen-binding hemoglobins from human, soy, and clam also trap HNO to form adducts which are stable over a period of weeks. The same species can be formed in higher yields by careful reduction of the ferrous nitrosyl adducts of the proteins. Like the analogous O(2)-Fe(II) adducts, the HNO adducts are diamagnetic, but with a characteristic HNO resonance in (1)H NMR at ca. 15 ppm that splits into doublets for H(15)NO adducts. The (1)H and (15)N NMR resonances, obtained by HSQC experiments, are shown to differentiate subunits and isoforms of proteins within mixtures. An apparent difference in the reduction rates of the NO adducts of the two subunits of human hemoglobin allows assignment of two distinct nitrosyl hydride peaks by a combination of UV-vis, NMR, and EPR analysis. The two peaks of the HNO-hHb adduct have a persistent 3:1 ratio during trapping reactions, demonstrating a kinetic difference between HNO binding at the two subunits. These results show NMR characterization of ferrous HNO adducts as a unique tool sensitive to structural changes within the oxygen-binding cavity, which may be of use in defining modes of oxygen binding in other heme proteins and enzymes.
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Affiliation(s)
- Murugaeson R Kumar
- Department of Chemistry, University of California, Irvine, California 92697, USA
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32
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Zhang L, Tian DB, Zhu JJ. Direct electrochemistry and electrochemical catalysis of myoglobin–TiO2 coated multiwalled carbon nanotubes modified electrode. Bioelectrochemistry 2008; 74:157-63. [DOI: 10.1016/j.bioelechem.2008.07.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 07/08/2008] [Accepted: 07/09/2008] [Indexed: 11/30/2022]
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33
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Geng M, Xu J, Hu S. In situ electrogenerated poly(Eriochrome black T) film and its application in nitric oxide sensor. REACT FUNCT POLYM 2008. [DOI: 10.1016/j.reactfunctpolym.2008.06.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Jiang H, Du C, Zou Z, Li X, Akins DL, Yang H. A biosensing platform based on horseradish peroxidase immobilized onto chitosan-wrapped single-walled carbon nanotubes. J Solid State Electrochem 2008. [DOI: 10.1007/s10008-008-0612-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Tu W, Lei J, Ju H. Noncovalent nanoassembly of porphyrin on single-walled carbon nanotubes for electrocatalytic reduction of nitric oxide and oxygen. Electrochem commun 2008. [DOI: 10.1016/j.elecom.2008.02.032] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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36
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Zhang Q, Wei W, Zhao GC. Direct Electrochemistry of Myoglobin on a Room Temperature Ionic Liquid Modified Electrode and Its Application to Nitric Oxide Biosensing. ELECTROANAL 2008. [DOI: 10.1002/elan.200704139] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Moghaddam AB, Ganjali MR, Dinarvand R, Ahadi S, Saboury AA. Myoglobin immobilization on electrodeposited nanometer-scale nickel oxide particles and direct voltammetry. Biophys Chem 2008; 134:25-33. [DOI: 10.1016/j.bpc.2008.01.001] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2007] [Revised: 01/06/2008] [Accepted: 01/07/2008] [Indexed: 10/22/2022]
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38
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Safavi A, Maleki N, Moradlou O, Sorouri M. Direct electrochemistry of hemoglobin and its electrocatalytic effect based on its direct immobilization on carbon ionic liquid electrode. Electrochem commun 2008. [DOI: 10.1016/j.elecom.2007.12.026] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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39
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Protein electrodes with direct electrochemical communication. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2008; 109:19-64. [PMID: 17928972 DOI: 10.1007/10_2007_083] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/07/2023]
Abstract
Electrochemistry using direct electron transfer between an electrode and a protein or an enzyme has developed into a means for studying biological redox reactions and for bioanalytics, biosynthesis and bioenergetics. This review summarizes recent work on direct protein electrochemistry with special emphasis on our results in bioelectrocatalysis using isolated enzymes and enzyme-protein couples.
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Guo Z, Chen J, Liu H, Cha C. Direct electrochemistry of hemoglobin and myoglobin at didodecyldimethylammonium bromide-modified powder microelectrode and application for electrochemical detection of nitric oxide. Anal Chim Acta 2008; 607:30-6. [DOI: 10.1016/j.aca.2007.11.038] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2007] [Revised: 11/11/2007] [Accepted: 11/15/2007] [Indexed: 11/25/2022]
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41
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Yang M, Qu F, Li Y, He Y, Shen G, Yu R. Direct electrochemistry of hemoglobin in gold nanowire array. Biosens Bioelectron 2007; 23:414-20. [PMID: 17582754 DOI: 10.1016/j.bios.2007.05.003] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2007] [Revised: 04/19/2007] [Accepted: 05/09/2007] [Indexed: 11/26/2022]
Abstract
Gold nanowire array has been proven to be efficient support matrixes for the immobilization of hemoglobin (Hb). The vertically oriented nanowire array provides an ordered well-defined 3D structure with nanowire density approximately 5 x 10(8)cm(2). The adsorption of ferritin onto the nanowire surface was visualized by transmission electron microscopy. When Hb was adsorbed, UV-vis absorption and Fourier transform infrared (FT-IR) spectra show no obvious denaturation of Hb in the nanowire array. The Hb-modified nanowire array exerted direct electron transfer and gave a well-defined, nearly reversible redox couple with formal potential of -0.225 V. The quantity of electroactive Hb varied with the changing of the morphology of the electrode and found to increase with the increasing of the nanowire length. Comparisons of voltammetric and quartz crystal microbalance measurements show that 70% of the Hb molecules adsorbed are electroactive when the length of the nanowire was 2 microm. Both of the Hb-modified nanowire array and the unmodified nanowire array demonstrate good electrocatalytic reduction ability for hydrogen peroxide. With the adsorption of glucose oxidase onto the bare nanowire surface, sensitive and selective glucose biosensors can be fabricated.
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Affiliation(s)
- Minghui Yang
- State key laboratory of Chemo/Biosensing and Chemometrics, Biomedical Engineering Center, Chemistry and Chemical Engineering College, Hunan University, Changsha 410082, PR China
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42
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Lu Q, Hu C, Cui R, Hu S. Direct Electron Transfer of Hemoglobin Founded on Electron Tunneling of CTAB Monolayer. J Phys Chem B 2007; 111:9808-13. [PMID: 17672489 DOI: 10.1021/jp071201t] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Direct electron transfer and stable adsorption of hemoglobin (Hb) on a carbon paste (CP) electrode were achieved with the aid of a single-chain cationic surfactant, namely, cetyltrimethylammonium bromide (CTAB). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) indicated that CTAB could form a complete monolayer with a high density of positive charges on the surface of the CP electrode, which strongly adsorbed negatively charged protein molecules via electrostatic interactions. The surfactant molecules anchored the protein molecules to align in suitable orientations and acted as electron-tunneling pathways between the protein molecules and the CP electrode. The bioelectrocatalytic activity of the immobilized Hb was confirmed by RAIR and UV-vis spectroscopies, and rapid electrochemical responses to the reduction of oxygen (O2), hydrogen peroxide (H2O2), and nitrite (NO2-) were also obtained.
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Affiliation(s)
- Qing Lu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, P. R. China
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43
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Roncaroli F, Videla M, Slep LD, Olabe JA. New features in the redox coordination chemistry of metal nitrosyls {M–NO+; M–NO; M–NO−(HNO)}. Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2007.04.012] [Citation(s) in RCA: 116] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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44
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Kumar SA, Chen SM. WITHDRAWN: Direct electrochemistry and electrocatalysis of myoglobin on redox-active self-assembling monolayers derived from nitroaniline modified electrode. Biosens Bioelectron 2007; 22:3042-50. [PMID: 17306525 DOI: 10.1016/j.bios.2007.01.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2006] [Revised: 11/23/2006] [Accepted: 01/04/2007] [Indexed: 10/23/2022]
Abstract
The adsorption processes and electrochemical behavior of 4-nitroaniline (4-NA) and 2-nitroaniline (2-NA) adsorbed onto glassy carbon electrodes (GCE) have been investigated in aqueous 0.1M nitric acid (HNO(3)) electrolyte solutions using cyclic voltammetry (CV). Nitroaniline adsorbs onto GCE surfaces and upon potential cycling past -0.55 V is transformed into the arylhydroxylamine (ArHA), which exhibits a well-behaved pH dependent redox couple centered at 0.32 V (pH 1.5). This modified electrode can be readily used as an immobilization matrix to entrap proteins and enzymes. In our studies, myoglobin (Mb) was chosen as a model protein for investigation. A pair of well-defined reversible redox peaks for Mb(Fe(III)-Fe(II)) was obtained at the Mb/arylhydroxylamine modified glassy carbon electrode (Mb/HAGCE) by direct electron transfer between the protein and the GCE. The formal potential (E(0')), the surface coverage (Gamma) and the electron transfer rate constant (k(s)) were calculated as -0.317 V, 4.15+/-0.5 x 10(-11)mol/cm(2) and 51+/-5s(-1), respectively. Dramatically enhanced biocatalytic activity was exemplified at the Mb/HAGCE for the reduction of hydrogen peroxide (H(2)O(2)), trichloroacetic acid (TCA) and oxygen (O(2)). The Mb/ArHA film was also characterized by UV-vis spectra, scanning electron microscope (SEM) indicating excellent stability and good biocompatibility for protein in the film. The applicability of the method to the determination of H(2)O(2) ( approximately 3%) in a commercial antiseptic solution and soft-contact lenses cleaning solutions were demonstrated. This new Mb/HAGCE exhibited rapid electrochemical response (with in 2s) with good stability in physiological condition.
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Affiliation(s)
- S Ashok Kumar
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei, Taiwan 106, Republic of China
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46
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de Groot MT, Merkx M, Koper MT. Bioinspired electrocatalytic reduction of nitric oxide by immobilized heme groups. CR CHIM 2007. [DOI: 10.1016/j.crci.2006.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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47
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Xiao H, Zhou H, Chen G, Liu S, Li G. Interaction between Inducible Nitric Oxide Synthase and Calmodulin in Ca2+-Free and -Bound Forms. J Proteome Res 2007; 6:1426-9. [PMID: 17341110 DOI: 10.1021/pr060544l] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
We have obtained the first direct electrochemistry of full-length inducible nitric oxide synthase (iNOS) by entrapping the enzyme in polyethylenimine (PEI) film. The interaction between iNOS and calmodulin (CaM) was then studied, which revealed an enhanced electron-transfer reactivity of the enzyme facilitated by CaM. It was also found that interflavin electron transfer of iNOS could be activated by the binding of Ca2+-bound CaM. The formal potentials (E degrees ') of flavin adenine dinucleotide (FAD) and flavin mononucleotide (FMN) were determined to be -470 and -284 mV vs SCE at pH 7, respectively. The effect of Ca2+ on the interaction between iNOS and CaM has been examined as well. CaM bound with adequate Ca2+ was shown to have a better capability to enhance the electron-transfer reactions within iNOS.
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Affiliation(s)
- Han Xiao
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, People's Republic of China
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48
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Gao L, Gao Q. Hemoglobin niobate composite based biosensor for efficient determination of hydrogen peroxide in a broad pH range. Biosens Bioelectron 2007; 22:1454-60. [PMID: 16887346 DOI: 10.1016/j.bios.2006.06.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 06/14/2006] [Accepted: 06/23/2006] [Indexed: 10/24/2022]
Abstract
Inorganic layered niobates (HCa2Nb3O10) were used as immobilization matrices of hemoglobin (Hb) because of their tunable interlayer spaces, large surface areas and good biocompatibilities. A pair of well-defined, quasi-reversible cycle voltammertric peaks were obtained at the Hb-HCa2Nb3O10 modified pyrolytic graphite electrode, suggesting that the layered niobates facilitate the electron transfer between the proteins and the electrode. Hb-HCa2Nb3O10 modified electrode exhibited electrocatalytic response for monitoring H2O2 with a large linear detection range from 25 microM to 3.0 mM and a relatively high sensitivity of 172 microA mM-1 cm-2. Based on the stabilizing effect of the layered niobates, Hb-HCa2Nb3O10 modified electrode can detect H2O2 in strongly acidic and basic solutions with pH of 1-12, which greatly expands the application fields of biosensors.
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Affiliation(s)
- Lu Gao
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Graduate School, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Rd., Shanghai 200050, PR China
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Krylov A, Lisdat F. Nickel Hexacyanoferrate-Based Sensor Electrode for the Detection of Nitric Oxide at Low Potentials. ELECTROANAL 2007. [DOI: 10.1002/elan.200603668] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Myoglobin/arylhydroxylamine film modified electrode: Direct electrochemistry and electrochemical catalysis. Talanta 2006; 72:831-8. [PMID: 19071694 DOI: 10.1016/j.talanta.2006.10.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2006] [Revised: 10/20/2006] [Accepted: 10/20/2006] [Indexed: 11/20/2022]
Abstract
The adsorption processes and electrochemical behavior of 4-nitroaniline (4-NA) adsorbed onto glassy carbon electrodes (GCE) have been investigated in aqueous 0.1M nitric acid (HNO(3)) electrolyte solutions using cyclic voltammetry (CV). 4-NA adsorbs onto GCE surfaces, and upon potential cycling past -0.2V, is transformed into the arylhydroxylamine (ArHA) derivative which exhibits a well-behaved pH dependent redox couple centered at 0.32V at pH 1.5. It is noted as arylhydroxylamine modified glassy carbon electrodes (HAGCE). This modified electrode can be readily used as an immobilization matrix to entrap proteins and enzymes. In our studies, myoglobin (Mb) was used as a model protein for investigation. A pair of well-defined reversible redox peaks of Mb (Fe(III)-Fe(II)) was obtained at the Mb/arylhydroxylamine modified glassy carbon electrode (Mb/HAGC) by direct electron transfer between the protein and the GCE. The formal potential ( [Formula: see text] ), the apparent coverage (Gamma(*)) and the electron-transfer rate constant (k(s)) were calculated as -0.317V, 8.26x10(-12)mol/cm(2) and 51+/-5s(-1), respectively. Dramatically enhanced biocatalytic activity was exemplified at the Mb/HAGC electrode by the reduction of hydrogen peroxide (H(2)O(2)), trichloroacetic acid (TCA) and oxygen (O(2)). The Mb/arylhydroxylamine film was also characterized by UV-visible spectroscopy (UV-vis), scanning electron microscope (SEM) indicating excellent stability and good biocompatibility of the protein in the arylhydroxylamine modified electrode. This new Mb/HAGC electrode exhibited rapid electrochemical response (2s) for H(2)O(2) and had good stability in physiological condition, showing the potential applicability of the films in the preparation of third generation biosensors or bioreactors based on direct electrochemistry of the proteins.
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