Catalytic Electron Transport inChromatium vinosum[NiFe]-Hydrogenase:  Application of Voltammetry in Detecting Redox-Active Centers and Establishing That Hydrogen Oxidation Is Very Fast Even at Potentials Close to the Reversible H+/H2Value†

Biochemistry ◽  
1999 ◽  
Vol 38 (28) ◽  
pp. 8992-8999 ◽  
Author(s):  
Harsh R. Pershad ◽  
Jillian L. C. Duff ◽  
Hendrik A. Heering ◽  
Evert C. Duin ◽  
Simon P. J. Albracht ◽  
...  
Keyword(s):  
Electron Transport ◽  
Hydrogen Oxidation ◽  
Active Centers ◽  
Redox Active

scholarly journals Spatial Organization of the Redox Active Centers in the Bovine Heart Ubiquinol-cytochrome c Oxidoreductase

1989 ◽  
Vol 264 (2) ◽  
pp. 735-744
Author(s):  
T Ohnishi ◽  
H Schägger ◽  
S W Meinhardt ◽  
R LoBrutto ◽  
T A Link ◽  
...  
Keyword(s):  
Cytochrome C ◽  
Spatial Organization ◽  
Active Centers ◽  
Bovine Heart ◽  
Redox Active

Dendritic Metalloporphyrin-Fullerene Conjugates: Changing the Microenvironment around Redox-Active Centers and its Impact on Charge-Transfer Reactions

2012 ◽  
Vol 18 (33) ◽  
pp. 10427-10435 ◽  
Author(s):  
Evangelos Krokos ◽  
Fabian Spänig ◽  
Michaela Ruppert ◽  
Andreas Hirsch ◽  
Dirk M. Guldi
Keyword(s):  
Charge Transfer ◽  
Transfer Reactions ◽  
Active Centers ◽  
Redox Active ◽  
Charge Transfer Reactions

scholarly journals The hupC gene product is a component of the electron transport system for hydrogen oxidation in Pseudomonas hydrogenovora

2006 ◽  
Vol 150 (1) ◽  
pp. 127-133 ◽  
Author(s):  
Takashi Ohtsuki ◽  
Yukihiro Kita ◽  
Toyofumi Fujioka ◽  
Daisuke Hashimoto ◽  
Makoto Shimosaka ◽  
...  
Keyword(s):  
Electron Transport ◽  
Gene Product ◽  
Transport System ◽  
Hydrogen Oxidation ◽  
Electron Transport System

scholarly journals Spin-Dependent Electron Transport through Bacterial Cell Surface Multiheme Electron Conduits

2019 ◽  
Author(s):  
Suryakant Mishra ◽  
Sahand Pirbadian ◽  
Amit Kumar Mondal ◽  
Moh El-Naggar ◽  
Ron Naaman
Keyword(s):  
Electron Transport ◽  
Cell Surface ◽  
Bacterial Cell ◽  
Shewanella Oneidensis ◽  
Extracellular Electron Transfer ◽  
Long Distance ◽  
Force Microscopy ◽  
Bacterial Cell Surface ◽  
Redox Active ◽  
Gain Energy

Multiheme cytochromes, located on the bacterial cell surface, function as long-distance (> 10 nm) electron conduits linking intracellular reactions to external surfaces. This extracellular electron transfer process, which allows microorganisms to gain energy by respiring solid redox-active minerals, also facilitates the wiring of cells to electrodes. While recent studies suggested that a chiral induced spin selectivity effect is linked to efficient electron transmission through biomolecules, this phenomenon has not been investigated in the extracellular electron conduits. Using magnetic conductive probe atomic force microscopy, Hall voltage measurements, and spin-dependent electrochemistry of the decaheme cytochromes MtrF and OmcA from the metal-reducing bacterium <i>Shewanella oneidensis</i> MR-1, we show that electron transport through these extracellular conduits is spin-selective. Our study has implications for understanding how spin-dependent interactions and magnetic fields may control electron transport across biotic-abiotic interfaces in both natural and biotechnological systems.

Control of electron transport using redox-active core dendrimers

2000 ◽  
Vol 156 (1) ◽  
pp. 61-68 ◽  
Author(s):  
Christopher B. Gorman ◽  
Jennifer C. Smith ◽  
Rakesh Sachdeva ◽  
Wendy Y. Su ◽  
Hongwei Jiang
Keyword(s):  
Electron Transport ◽  
Redox Active ◽  
Active Core

scholarly journals Cover Feature: Improving Gating Efficiency of Electron Transport through Redox‐Active Molecular Junctions with Conjugated Chains (ChemElectroChem 6/2020)

2020 ◽  
Vol 7 (6) ◽  
pp. 1288-1288 ◽  
Author(s):  
Fan Zhang ◽  
Xiao‐Hui Wu ◽  
Yi‐Fan Zhou ◽  
Ya‐Hao Wang ◽  
Xiao‐Shun Zhou ◽  
...  
Keyword(s):  
Electron Transport ◽  
Molecular Junctions ◽  
Redox Active

scholarly journals Made-to-order porous electrodes for supercapacitors: MOFs embedded with redox-active centers as a case study

2020 ◽  
Vol 56 (12) ◽  
pp. 1883-1886 ◽  
Author(s):  
Arijit Mallick ◽  
Hanfeng Liang ◽  
Osama Shekhah ◽  
Jiangtao Jia ◽  
Georges Mouchaham ◽  
...  
Keyword(s):  
Porous Electrodes ◽  
Active Centers ◽  
Redox Active ◽  
Electrodes For Supercapacitors ◽  
The Way

These predesigned Zr-based MOFs could pave the way for many applications related to supercapacitors.

Different synthetic pathways of nanoparticle-cored dendrimers (NCDs): Effects on the properties and their application as redox active centers

2014 ◽  
Vol 52 (22) ◽  
pp. 3185-3197 ◽  
Author(s):  
Julieta I. Paez ◽  
Pablo Froimowicz ◽  
Katharina Landfester ◽  
Verónica Brunetti ◽  
Miriam Strumia
Keyword(s):  
Active Centers ◽  
Redox Active

Long-range electron transport to Fe(III) oxide via pili with metallic-like conductivity

2012 ◽  
Vol 40 (6) ◽  
pp. 1186-1190 ◽  
Author(s):  
Derek R. Lovley
Keyword(s):  
Electron Transport ◽  
Long Range ◽  
Geobacter Sulfurreducens ◽  
Oxide Reduction ◽  
Electron Hopping ◽  
Electrically Conductive ◽  
Electron Conduction ◽  
Geobacter Species ◽  
Redox Active

The mechanisms for Fe(III) oxide reduction by Geobacter species are of interest because Geobacter species have been shown to play an important role in Fe(III) oxide reduction in a diversity of environments in which Fe(III) reduction is a geochemically significant process. Geobacter species specifically express pili during growth on Fe(III) oxide compared with growth on soluble chelated Fe(III), and mutants that cannot produce pili are unable to effectively reduce Fe(III) oxide. The pili of Geobacter sulfurreducens are electrically conductive along their length under physiologically relevant conditions and exhibit a metallic-like conductivity similar to that observed previously in synthetic organic metals. Metallic-like conductivity in a biological protein filament is a previously unrecognized mechanism for electron transport that differs significantly from the more well-known biological strategy of electron hopping/tunnelling between closely spaced redox-active proteins. The multihaem c-type cytochrome OmcS is specifically associated with pili and is necessary for Fe(III) oxide reduction. However, multiple lines of evidence, including the metallic-like conductivity of the pili and the fact that OmcS molecules are spaced too far apart for electron hopping/tunnelling, indicate that OmcS is not responsible for long-range electron conduction along the pili. The role of OmcS may be to facilitate electron transfer from the pili to Fe(III) oxide. Long-range electron transport via pili with metallic-like conductivity is a paradigm shift that has important implications not only for Fe(III) oxide reduction, but also for interspecies electron exchange in syntrophic microbial communities as well as microbe–electrode interactions and the emerging field of bioelectronics.

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