Artículo
Ly, H.K.; Marti, M.A.; Martin, D.F.; Alvarez-Paggi, D.; Meister, W.; Kranich, A.; Weidinger, I.M.; Hildebrandt, P.; Murgida, D.H. "Thermal fluctuations determine the electron-transfer rates of cytochrome c in electrostatic and covalent complexes" (2010) ChemPhysChem. 11(6):1225-1235
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Abstract:
The heterogeneous electron-transfer (ET) reaction of cytochrome c (Cyt-c) electrostatically or covalently immobilized on electrodes coated with self-assembled monolayers (SAMs) of ω-functionalized alkanethiols is analyzed by surface-enhanced resonance Raman (SERR) spectroscopy and molecular dynamics (MD) simulations. Electrostatically bound Cyt-c on pure carboxyl-terminated and mixed carboxyl/hydroxyl-terminated SAMs reveals the same distance dependence of the rate constants, that is, electron tunneling at long distances and a regime controlled by the protein orientational distribution and dynamics that leads to a nearly distance-independent rate constant at short distances. Qualitatively, the same behavior is found for covalently bound Cyt-c, although the apparent ET rates in the plateau region are lower since protein mobility is restricted due to formation of amide bonds between the protein and the SAM. The experimental findings are consistent with the results of MD simulations indicating that thermal fluctuations of the protein and interfacial solvent molecules can effectively modulate the electron tunneling probability. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Registro:
| Documento: | Artículo |
| Título: | Thermal fluctuations determine the electron-transfer rates of cytochrome c in electrostatic and covalent complexes |
| Autor: | Ly, H.K.; Marti, M.A.; Martin, D.F.; Alvarez-Paggi, D.; Meister, W.; Kranich, A.; Weidinger, I.M.; Hildebrandt, P.; Murgida, D.H. |
| Filiación: | Technische Universitüt Berlin, Institut für Chemie, Str. des 17. Juni 135, Sekr. PC14, Berlin, Germany Departamento de Química Inorgánica, Analítica y Química Física INQUIMAE-CONICET, Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Ciudad Universitaria Pab. 2, piso 1, C1428EHA Buenos Aires, Argentina |
| Palabras clave: | Electron transfer; Molecular dynamics; Monolayers; Proteins; Time-resolved spectroscopy; cytochrome c; immobilized protein; article; chemistry; electrode; electron transport; kinetics; molecular dynamics; oxidation reduction reaction; Raman spectrometry; static electricity; thermodynamics; Cytochromes c; Electrodes; Electron Transport; Immobilized Proteins; Kinetics; Molecular Dynamics Simulation; Oxidation-Reduction; Spectrum Analysis, Raman; Static Electricity; Thermodynamics |
| Año: | 2010 |
| Volumen: | 11 |
| Número: | 6 |
| Página de inicio: | 1225 |
| Página de fin: | 1235 |
| DOI: | http://dx.doi.org/10.1002/cphc.200900966 |
| Título revista: | ChemPhysChem |
| Título revista abreviado: | ChemPhysChem |
| ISSN: | 14394235 |
| CODEN: | CPCHF |
| CAS: | cytochrome c, 9007-43-6, 9064-84-0; Cytochromes c, 9007-43-6; Immobilized Proteins |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14394235_v11_n6_p1225_Ly |
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Citas:
---------- APA ----------
Ly, H.K., Marti, M.A., Martin, D.F., Alvarez-Paggi, D., Meister, W., Kranich, A., Weidinger, I.M.,..., Murgida, D.H. (2010) . Thermal fluctuations determine the electron-transfer rates of cytochrome c in electrostatic and covalent complexes. ChemPhysChem, 11(6), 1225-1235.http://dx.doi.org/10.1002/cphc.200900966
---------- CHICAGO ----------
Ly, H.K., Marti, M.A., Martin, D.F., Alvarez-Paggi, D., Meister, W., Kranich, A., et al. "Thermal fluctuations determine the electron-transfer rates of cytochrome c in electrostatic and covalent complexes" . ChemPhysChem 11, no. 6 (2010) : 1225-1235.http://dx.doi.org/10.1002/cphc.200900966
---------- MLA ----------
Ly, H.K., Marti, M.A., Martin, D.F., Alvarez-Paggi, D., Meister, W., Kranich, A., et al. "Thermal fluctuations determine the electron-transfer rates of cytochrome c in electrostatic and covalent complexes" . ChemPhysChem, vol. 11, no. 6, 2010, pp. 1225-1235.http://dx.doi.org/10.1002/cphc.200900966
---------- VANCOUVER ----------
Ly, H.K., Marti, M.A., Martin, D.F., Alvarez-Paggi, D., Meister, W., Kranich, A., et al. Thermal fluctuations determine the electron-transfer rates of cytochrome c in electrostatic and covalent complexes. ChemPhysChem. 2010;11(6):1225-1235.http://dx.doi.org/10.1002/cphc.200900966
