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

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 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 168 (2) ◽  
pp. 025503
Author(s):  
Olja Simoska ◽  
Erin M. Gaffney ◽  
Koun Lim ◽  
Kevin Beaver ◽  
Shelley D. Minteer
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Extracellular Electron Transfer

scholarly journals Tailored extracellular electron transfer pathways enhance the electroactivity of Escherichia coli

2021 ◽  
Author(s):  
Mohammed Mouhib ◽  
Melania Reggente ◽  
Lin Li ◽  
Nils Schuergers ◽  
Ardemis Anoush Boghossian
Keyword(s):  
Escherichia Coli ◽  
Electron Transfer ◽  
Shewanella Oneidensis ◽  
Electrical Current ◽  
Extracellular Electron Transfer ◽  
Organic Substrates ◽  
Transfer Rates ◽  
Electron Shuttling ◽  
E Coli ◽  
Electron Transfer Pathways

Extracellular electron transfer (EET) engineering in Escherichia coli holds great potential for bioremediation, energy and electrosynthesis applications fueled by readily available organic substrates. Due to its vast metabolic capabilities and availability of synthetic biology tools to adapt strains to specific applications, E. coli is of advantage over native exoelectrogens, but limited in electron transfer rates. We enhanced EET in engineered strains through systematic expression of electron transfer pathways differing in cytochrome composition, localization and origin. While a hybrid pathway harboring components of an E. coli nitrate reductase and the Mtr complex from the exoelectrogen Shewanella oneidensis MR-1 enhanced EET, the highest efficiency was achieved by implementing the complete Mtr pathway from S. oneidensis MR1 in E. coli. We show periplasmic electron shuttling through overexpression of a small tetraheme cytochrome to be central to the electroactivity of this strain, leading to enhanced degradation of the pollutant methyl orange and significantly increased electrical current to graphite electrodes.

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
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