Attenuation of guanine oxidation via DNA-mediated electron transfer in a crowded environment using small cosolutes

2018 ◽  
Vol 16 (36) ◽  
pp. 6695-6702 ◽  
Author(s):  
Makiko Tanaka ◽  
Takayuki Matsumoto ◽  
Hiroki Iida
Keyword(s):  
Electron Transfer ◽  
Molecular Crowding ◽  
Guanine Oxidation ◽  
Mediated Electron Transfer ◽  
Modified Oligonucleotide ◽  
Crowded Environment

Guanine oxidation induced by photoirradiation on a pyrene-modified oligonucleotide was investigated under molecular crowding using small cosolutes such as glycerol.

Inhibiting guanine oxidation and enhancing the excess-electron-transfer efficiency of a pyrene-modified oligonucleotide by introducing an electron-donating group on pyrene

2019 ◽  
Vol 55 (93) ◽  
pp. 14062-14065 ◽  
Author(s):  
Takumi Okuda ◽  
Yusuke Kawashima ◽  
Yuuya Kasahara ◽  
Tatsuya Takagi ◽  
Junpei Yamamoto ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Excess Electron ◽  
Transfer Efficiency ◽  
Guanine Oxidation ◽  
Mediated Electron Transfer ◽  
Reduction Efficiency ◽  
Modified Oligonucleotide

PipPyU and OMePyU enhance the reduction efficiency without oxidizing guanine in DNA-mediated electron transfer.

Evaluation of DNA-mediated electron transfer using a hole-trapping nucleobase under crowded conditions

2022 ◽  
Author(s):  
Yuuki Taketomi ◽  
Yuuki Yamaguchi ◽  
Shunsuke Sakurai ◽  
Makiko Tanaka
Keyword(s):  
Electron Transfer ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Hole Trapping ◽  
Mixed Solutions ◽  
Mediated Electron Transfer ◽  
Poly Ethylene ◽  
Modified Oligonucleotide ◽  
Crowded Environment

The effects of a crowded environment on DNA-mediated electron transfer were evaluated using a pyrene-modified oligonucleotide containing a hole-trapping nucleobase in poly(ethylene glycol) mixed solutions. Rapid decompositions of hole-trapping bases...

Drastic promotion of guanine oxidation via electron transfer in Ψ-type DNA

2019 ◽  
Vol 55 (53) ◽  
pp. 7695-7698 ◽  
Author(s):  
Shunsuke Sakurai ◽  
Mayu Esumi ◽  
Makiko Tanaka
Keyword(s):  
Electron Transfer ◽  
Guanine Oxidation ◽  
Crowded Environment

Drastic promotion of guanine oxidation was induced by not only intraduplex ET but also interduplex ET in Ψ-type DNA in a crowded environment using PEG.

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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