Comparison of Interfacial Electron Transfer Efficiency in [Fe(ctpy)2]2+–TiO2 and [Fe(cCNC)2]2+–TiO2 Assemblies: Importance of Conformational Sampling

2018 ◽  
Vol 122 (7) ◽  
pp. 1821-1830 ◽  
Author(s):  
Sriparna Mukherjee ◽  
Chang Liu ◽  
Elena Jakubikova
Keyword(s):  
Electron Transfer ◽  
Transfer Efficiency ◽  
Conformational Sampling ◽  
Interfacial Electron Transfer

Flavin radicals, conformational sampling and robust design principles in interprotein electron transfer: the trimethylamine dehydrogenase-electron-transferring flavoprotein complex

2004 ◽  
Vol 71 ◽  
pp. 1-14
Author(s):  
David Leys ◽  
Jaswir Basran ◽  
François Talfournier ◽  
Kamaldeep K. Chohan ◽  
Andrew W. Munro ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Dimensional Space ◽  
Three Dimensional ◽  
Kinetic Studies ◽  
Molecular Assembly ◽  
Conformational Sampling ◽  
Trimethylamine Dehydrogenase ◽  
Key Residues ◽  
Electron Transferring Flavoprotein ◽  
Electron Transfer Complex

TMADH (trimethylamine dehydrogenase) is a complex iron-sulphur flavoprotein that forms a soluble electron-transfer complex with ETF (electron-transferring flavoprotein). The mechanism of electron transfer between TMADH and ETF has been studied using stopped-flow kinetic and mutagenesis methods, and more recently by X-ray crystallography. Potentiometric methods have also been used to identify key residues involved in the stabilization of the flavin radical semiquinone species in ETF. These studies have demonstrated a key role for 'conformational sampling' in the electron-transfer complex, facilitated by two-site contact of ETF with TMADH. Exploration of three-dimensional space in the complex allows the FAD of ETF to find conformations compatible with enhanced electronic coupling with the 4Fe-4S centre of TMADH. This mechanism of electron transfer provides for a more robust and accessible design principle for interprotein electron transfer compared with simpler models that invoke the collision of redox partners followed by electron transfer. The structure of the TMADH-ETF complex confirms the role of key residues in electron transfer and molecular assembly, originally suggested from detailed kinetic studies in wild-type and mutant complexes, and from molecular modelling.

A Comparison between Interfacial Electron-Transfer Rate Constants at Metallic and Graphite Electrodes

2006 ◽  
Vol 110 (39) ◽  
pp. 19433-19442 ◽  
Author(s):  
William J. Royea ◽  
Thomas W. Hamann ◽  
Bruce S. Brunschwig ◽  
Nathan S. Lewis
Keyword(s):  
Electron Transfer ◽  
Rate Constants ◽  
Transfer Rate ◽  
Interfacial Electron Transfer ◽  
Electron Transfer Rate ◽  
Graphite Electrodes

Autonomous Control of Interfacial Electron Transfer and the Activation of DNA Machines by an Oscillatory pH System

Nano Letters ◽  
2013 ◽  
Vol 13 (10) ◽  
pp. 4920-4924 ◽  
Author(s):  
Xiu-Juan Qi ◽  
Chun-Hua Lu ◽  
Xiaoqing Liu ◽  
Simcha Shimron ◽  
Huang-Hao Yang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Autonomous Control ◽  
Interfacial Electron Transfer ◽  
Dna Machines

Interfacial electron transfer in titanium dioxide colloids

1985 ◽  
Vol 107 (23) ◽  
pp. 6446-6451 ◽  
Author(s):  
Graham T. Brown ◽  
James R. Darwent ◽  
Paul D. I. Fletcher
Keyword(s):  
Electron Transfer ◽  
Titanium Dioxide ◽  
Interfacial Electron Transfer
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