Directional Preference of DNA‐Mediated Electron Transfer in Gold‐Tethered DNA Duplexes: Is DNA a Molecular Rectifier?

2018 ◽  
Vol 131 (10) ◽  
pp. 3080-3084 ◽  
Author(s):  
László Kékedy‐Nagy ◽  
Elena E. Ferapontova
Keyword(s):  
Electron Transfer ◽  
Dna Duplexes ◽  
Mediated Electron Transfer ◽  
Directional Preference ◽  
Molecular Rectifier

scholarly journals DNA-Mediated Electron Transfer in DNA Duplexes Tethered to Gold Electrodes via Phosphorothioated dA Tags

Langmuir ◽  
2014 ◽  
Vol 30 (40) ◽  
pp. 11853-11857 ◽  
Author(s):  
Rui Campos ◽  
Alexander Kotlyar ◽  
Elena E. Ferapontova
Keyword(s):  
Electron Transfer ◽  
Gold Electrodes ◽  
Dna Duplexes ◽  
Mediated Electron Transfer

scholarly journals NADPH performs mediated electron transfer in cyanobacterial-driven bio-photoelectrochemical cells

iScience ◽  
2021 ◽  
Vol 24 (1) ◽  
pp. 101892
Author(s):  
Yaniv Shlosberg ◽  
Benjamin Eichenbaum ◽  
Tünde N. Tóth ◽  
Guy Levin ◽  
Varda Liveanu ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Photoelectrochemical Cells ◽  
Mediated Electron Transfer

scholarly journals On the role of non-diagonal system–environment interactions in bridge-mediated electron transfer

2020 ◽  
Vol 153 (18) ◽  
pp. 185101
Author(s):  
Nirmalendu Acharyya ◽  
Roman Ovcharenko ◽  
Benjamin P. Fingerhut
Keyword(s):  
Electron Transfer ◽  
System Environment ◽  
Diagonal System ◽  
Mediated Electron Transfer

scholarly journals Strain- and Substrate-Dependent Redox Mediator and Electricity Production by Pseudomonas aeruginosa

2016 ◽  
Vol 82 (16) ◽  
pp. 5026-5038 ◽  
Author(s):  
Erick M. Bosire ◽  
Lars M. Blank ◽  
Miriam A. Rosenbaum
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Electron Transfer ◽  
Fuel Cells ◽  
Microbial Fuel Cells ◽  
Pure Culture ◽  
Bioelectrochemical Systems ◽  
Content Type ◽  
Mediated Electron Transfer ◽  
Phenazine Production ◽  
Model Strain

ABSTRACTPseudomonas aeruginosais an important, thriving member of microbial communities of microbial bioelectrochemical systems (BES) through the production of versatile phenazine redox mediators. Pure culture experiments with a model strain revealed synergistic interactions ofP. aeruginosawith fermenting microorganisms whereby the synergism was mediated through the shared fermentation product 2,3-butanediol. Our work here shows that the behavior and efficiency ofP. aeruginosain mediated current production is strongly dependent on the strain ofP. aeruginosa. We compared levels of phenazine production by the previously investigated model strainP. aeruginosaPA14, the alternative model strainP. aeruginosaPAO1, and the BES isolatePseudomonassp. strain KRP1 with glucose and the fermentation products 2,3-butanediol and ethanol as carbon substrates. We found significant differences in substrate-dependent phenazine production and resulting anodic current generation for the three strains, with the BES isolate KRP1 being overall the best current producer and showing the highest electrochemical activity with glucose as a substrate (19 μA cm−2with ∼150 μg ml−1phenazine carboxylic acid as a redox mediator). Surprisingly,P. aeruginosaPAO1 showed very low phenazine production and electrochemical activity under all tested conditions.IMPORTANCEMicrobial fuel cells and other microbial bioelectrochemical systems hold great promise for environmental technologies such as wastewater treatment and bioremediation. While there is much emphasis on the development of materials and devices to realize such systems, the investigation and a deeper understanding of the underlying microbiology and ecology are lagging behind. Physiological investigations focus on microorganisms exhibiting direct electron transfer in pure culture systems. Meanwhile, mediated electron transfer with natural redox compounds produced by, for example,Pseudomonas aeruginosamight enable an entire microbial community to access a solid electrode as an alternative electron acceptor. To better understand the ecological relationships between mediator producers and mediator utilizers, we here present a comparison of the phenazine-dependent electroactivities of threePseudomonasstrains. This work forms the foundation for more complex coculture investigations of mediated electron transfer in microbial fuel cells.

On the theory of nonadiabatic bridge-mediated electron transfer

2003 ◽  
Vol 26 (2) ◽  
pp. 187-196 ◽  
Author(s):  
L. Bade ◽  
E. G. Petrov ◽  
V. May
Keyword(s):  
Electron Transfer ◽  
Mediated Electron Transfer

Comparison of Direct and Mediated Electron Transfer for Cellobiose Dehydrogenase fromPhanerochaete sordida

2009 ◽  
Vol 81 (7) ◽  
pp. 2791-2798 ◽  
Author(s):  
Federico Tasca ◽  
Lo Gorton ◽  
Wolfgang Harreither ◽  
Dietmar Haltrich ◽  
Roland Ludwig ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Cellobiose Dehydrogenase ◽  
Mediated Electron Transfer
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