Uncovering alternate charge transfer mechanisms in Escherichia coli chemically functionalized with conjugated oligoelectrolytes

2014 ◽  
Vol 50 (60) ◽  
pp. 8223-8226 ◽  
Author(s):  
Victor Bochuan Wang ◽  
Natalia Yantara ◽  
Teck Ming Koh ◽  
Staffan Kjelleberg ◽  
Qichun Zhang ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Charge Transfer ◽  
Extracellular Electron Transfer ◽  
Transfer Mechanisms

Conjugated oligoelectrolytes integrated in Escherichia coli have been proposed to induce release of electroactive cytosolic components, which contributes to extracellular electron transfer.

scholarly journals Modeling biofilms with dual extracellular electron transfer mechanisms

2013 ◽  
Vol 15 (44) ◽  
pp. 19262 ◽  
Author(s):  
Ryan Renslow ◽  
Jerome Babauta ◽  
Andrew Kuprat ◽  
Jim Schenk ◽  
Cornelius Ivory ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Extracellular Electron Transfer ◽  
Transfer Mechanisms

scholarly journals Using Structure-Function Relationships to Understand the Mechanism of Phenazine Mediated Extracellular Electron Transfer in Escherichia coli

iScience ◽  
2021 ◽  
pp. 103033
Author(s):  
Zayn Rhodes ◽  
Olja Simoska ◽  
Ashwini Dantanarayana ◽  
Keith J. Stevenson ◽  
Shelley D. Minteer
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Structure Function ◽  
Extracellular Electron Transfer

Extracellular electron transfer mechanisms between microorganisms and minerals

2016 ◽  
Vol 14 (10) ◽  
pp. 651-662 ◽  
Author(s):  
Liang Shi ◽  
Hailiang Dong ◽  
Gemma Reguera ◽  
Haluk Beyenal ◽  
Anhuai Lu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Extracellular Electron Transfer ◽  
Transfer Mechanisms

Hydrogen vs. electron transfer mechanisms in the chain decomposition of phenacyl bromides. Use of isotopic labeling as a mechanistic probe

1996 ◽  
Vol 74 (9) ◽  
pp. 1724-1730 ◽  
Author(s):  
Jocelyn Renaud ◽  
J. C. Scaiano
Keyword(s):  
Electron Transfer ◽  
Charge Transfer ◽  
Key Words ◽  
Hydrogen Transfer ◽  
Isotopic Labeling ◽  
Chain Reaction ◽  
Phenacyl Bromides ◽  
Mechanistic Probe ◽  
A Chain ◽  
Transfer Mechanisms

Ring-substituted α-bromoacetophenones react with alcohols in a chain reaction leading to the corresponding acetophenone, HBr, and the carbonyl compound from oxidation of the alcohol. Two different mechanisms, involving hydrogen or electron transfer by ketyl radicals, have been proposed in order to accommodate the unusual selectivities of these reactions. By studying the efficiency of isotope incorporation from deuterated alcohols, it has been possible to determine the relative contributions from both mechanisms. For example, electron transfer dominates in the case of 2-propanol, while hydrogen transfer is more important for methanol. The results demonstrate that ring substitution in the starting ketone is not a main contributing factor in the discrimination between the two mechanisms. The only parameter that seems to be playing a major role is the nature (reducing strength) of the ketyl radicals. Key words: dehydrobromination, charge transfer, isotope effect, ketyl radicals.

Microbial electricity production: Biomolecular elucidation of extracellular electron transfer mechanisms of Geobacter metallireducens

2018 ◽  
Vol 120 ◽  
pp. S87
Author(s):  
Tomás M. Fernandes ◽  
Pilar C. Portela ◽  
Joana M. Dantas ◽  
Carlos A. Salgueiro
Keyword(s):  
Electron Transfer ◽  
Electricity Production ◽  
Extracellular Electron Transfer ◽  
Geobacter Metallireducens ◽  
Transfer Mechanisms

scholarly journals High-resolution electrochemistry of the extracellular electron transfer of Escherichia coli

2020 ◽  
Author(s):  
Yong Xiao ◽  
Zhiyong Zheng ◽  
Haiyin Gang ◽  
Jens Ulstrup ◽  
Feng Zhao ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Differential Pulse ◽  
Extracellular Electron Transfer ◽  
Vitamin K3 ◽  
E Coli ◽  
Electrochemically Active ◽  
Current Production ◽  
Active Bacterium ◽  
K 12

AbstractEscherichia coli is one of the most important model bacteria in microorganism research and is broadly encountered in nature. In the present study, a wild-type E. coli strain K-12 was used for electrochemical investigations. Differential pulse voltammetry showed five pairs of redox peaks both for K-12 cells and the supernatant with potentials (anodic/cathodic) at −0.450/−0.378, −0.125/−0.105, −0.075/−0.055, +0.192/+0.264, and +0.300/+0.414 V (vs. Ag/AgCl), respectively. Chronoamperometry indicates that K-12 cells can produce immediate current by addition of glucose. The current production from K-12 can be 8-fold enhanced by 10.0 μM exogenetic vitamin K3, but addition of 10.0 μM riboflavin did not enhance the current production. Medium replacement experiments show that 50 % of the K-12 biofilm current was produced via direct extracellular electron transfer pathways. The study provides new insight in the voltammetry of strain K-12 and confirms that E. coli is an electrochemically active bacterium. E. coli has the potential to serve as a model bacterium for studying microbial extracellular electron transfer mechanisms.

Understanding the Properties of Phenazine Mediators That Promote Extracellular Electron Transfer in Escherichia coli

2021 ◽  
Vol MA2021-01 (42) ◽  
pp. 1744-1744
Author(s):  
Olja Simoska ◽  
Shelley D. Minteer
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Extracellular Electron Transfer

Cathodes as electron donors for microbial metabolism: Which extracellular electron transfer mechanisms are involved?

2011 ◽  
Vol 102 (1) ◽  
pp. 324-333 ◽  
Author(s):  
Miriam Rosenbaum ◽  
Federico Aulenta ◽  
Marianna Villano ◽  
Largus T. Angenent
Keyword(s):  
Electron Transfer ◽  
Microbial Metabolism ◽  
Electron Donors ◽  
Extracellular Electron Transfer ◽  
Transfer Mechanisms

scholarly journals The Low Conductivity of Geobacter uraniireducens Pili Suggests a Diversity of Extracellular Electron Transfer Mechanisms in the Genus Geobacter

2016 ◽  
Vol 07 ◽  
Author(s):  
Yang Tan ◽  
Ramesh Y. Adhikari ◽  
Nikhil S. Malvankar ◽  
Joy E. Ward ◽  
Kelly P. Nevin ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Extracellular Electron Transfer ◽  
Transfer Mechanisms
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