Faculty Opinions recommendation of A flavin-based extracellular electron transfer mechanism in diverse Gram-positive bacteria.

2018 ◽  
Author(s):  
Angelika Gründling
Keyword(s):  
Electron Transfer ◽  
Transfer Mechanism ◽  
Extracellular Electron Transfer ◽  
Gram Positive ◽  
Electron Transfer Mechanism ◽  
Gram Positive Bacteria

scholarly journals A flavin-based extracellular electron transfer mechanism in diverse Gram-positive bacteria

Nature ◽  
2018 ◽  
Vol 562 (7725) ◽  
pp. 140-144 ◽  
Author(s):  
Samuel H. Light ◽  
Lin Su ◽  
Rafael Rivera-Lugo ◽  
Jose A. Cornejo ◽  
Alexander Louie ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transfer Mechanism ◽  
Extracellular Electron Transfer ◽  
Gram Positive ◽  
Electron Transfer Mechanism ◽  
Gram Positive Bacteria

Respiratory Au nucleation and microelectrode techniques reveal key features of bacterial conductive matrix

2020 ◽  
Vol 7 (10) ◽  
pp. 3189-3200
Author(s):  
María Victoria Ordóñez ◽  
Luciana Robuschi ◽  
Cristina Elena Hoppe ◽  
Juan Pablo Busalmen
Keyword(s):  
Gold Nanoparticles ◽  
Electron Transfer ◽  
Transfer Mechanism ◽  
Extracellular Electron Transfer ◽  
Electron Transfer Mechanism ◽  
Key Features ◽  
Microelectrode Techniques

Key elements of Geobacter's extracellular electron transfer mechanism are characterized combining respiratory formed gold nanoparticles with spectro-electrochemical and microelectrode techniques.

scholarly journals Flavin-mediated extracellular electron transfer in Gram-positive bacteria Bacillus cereus DIF1 and Rhodococcus ruber DIF2

RSC Advances ◽  
2019 ◽  
Vol 9 (70) ◽  
pp. 40903-40909 ◽  
Author(s):  
Tian Tian ◽  
Xiaoyang Fan ◽  
Man Feng ◽  
Lin Su ◽  
Wen Zhang ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Bacillus Cereus ◽  
Extracellular Electron Transfer ◽  
Rhodococcus Ruber ◽  
Bacterial Strains ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Electrochemically Active

A flavin-mediated EET process was reported here in two new isolated electrochemically active Gram-positive bacterial strains DIF1 and DIF2.

Bacterial nanotubes and their role as bacterial nanowires in Pseudomonas aeruginosa biofilms

2020 ◽  
Author(s):  
luyan ma
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Electron Transfer ◽  
Shewanella Oneidensis ◽  
Transfer Mechanism ◽  
Extracellular Electron Transfer ◽  
Electron Shuttle ◽  
Electron Transfer Mechanism ◽  
Energy Devices ◽  
Type Iv ◽  
Bacterial Nanowires

<p>Microbial nanowires are nanofilaments that could offer an extracellular electron transfer (EET) pathway linking the bacterial respiratory chain to external surfaces, such as oxidized metals in the environment and engineered electrodes in renewable energy devices. Filaments proposed to function as nanowires have been reported in multiple bacteria, yet it remains largely unclear about the composition and electron transfer mechanism of bacterial nanowires. Pseudomonas aeruginosa is an environmental and electrochemically active bacterium. In this study, we found nanotube-like extracellular filaments in P. aeruginosa biofilms, which were bacterial membrane extensions similar to the nanowires reported in Shewanella oneidensis. Remarkably, conductive probe atomic force microscope showed measurable conductivity of these extracellular filaments, suggesting that they may function as nanowires in P. aeruginosa. Our results also indicated that the electron shuttle pyocyanin significantly affected the conductivity of P. aeruginosa nanowires, suggesting that the electron transfer mechanism of P. aeruginosa nanowires was different from S. oneidensis. Furthermore, factors that impact biofilm formation, such as flagella, type IV pili, and exopolysaccharides, were not essential for nanowires formation, while affect the formation and length of nanowires of P. aeruginosa. Taken together, this is the first report that investigated the role of electron shuttle on the conductivity of nanowires and factors that affected nanowires formation.</p>

scholarly journals Extracellular Electron Transfer: Respiratory or Nutrient Homeostasis?

2020 ◽  
Vol 202 (7) ◽  
Author(s):  
Lars J. C. Jeuken ◽  
Kiel Hards ◽  
Yoshio Nakatani
Keyword(s):  
Electron Transfer ◽  
Iron Reduction ◽  
Ferric Iron ◽  
Shewanella Oneidensis ◽  
Geobacter Sulfurreducens ◽  
Extracellular Electron Transfer ◽  
Gram Positive ◽  
Content Type ◽  
Gram Positive Bacteria ◽  
Nutrient Homeostasis

ABSTRACT Exoelectrogens are able to transfer electrons extracellularly, enabling them to respire on insoluble terminal electron acceptors. Extensively studied exoelectrogens, such as Geobacter sulfurreducens and Shewanella oneidensis, are Gram negative. More recently, it has been reported that Gram-positive bacteria, such as Listeria monocytogenes and Enterococcus faecalis, also exhibit the ability to transfer electrons extracellularly, although it is still unclear whether this has a function in respiration or in redox control of the environment, for instance, by reducing ferric iron for iron uptake. In this issue of Journal of Bacteriology, Hederstedt and colleagues report on experiments that directly compare extracellular electron transfer (EET) pathways for ferric iron reduction and respiration and find a clear difference (L. Hederstedt, L. Gorton, and G. Pankratova, J Bacteriol 202:e00725-19, 2020, https://doi.org/10.1128/JB.00725-19), providing further insights and new questions into the function and metabolic pathways of EET in Gram-positive bacteria.

scholarly journals Extracellular electron transfer powers flavinylated extracellular reductases in Gram-positive bacteria

2019 ◽  
Vol 116 (52) ◽  
pp. 26892-26899 ◽  
Author(s):  
Samuel H. Light ◽  
Raphaël Méheust ◽  
Jessica L. Ferrell ◽  
Jooyoung Cho ◽  
David Deng ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Phylogenetic Analyses ◽  
Foodborne Pathogen ◽  
Extracellular Electron Transfer ◽  
Transfer System ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Electron Transfer System ◽  
Transport Chain ◽  
Insoluble Electron Acceptors

Mineral-respiring bacteria use a process called extracellular electron transfer to route their respiratory electron transport chain to insoluble electron acceptors on the exterior of the cell. We recently characterized a flavin-based extracellular electron transfer system that is present in the foodborne pathogenListeria monocytogenes, as well as many other Gram-positive bacteria, and which highlights a more generalized role for extracellular electron transfer in microbial metabolism. Here we identify a family of putative extracellular reductases that possess a conserved posttranslational flavinylation modification. Phylogenetic analyses suggest that divergent flavinylated extracellular reductase subfamilies possess distinct and often unidentified substrate specificities. We show that flavinylation of a member of the fumarate reductase subfamily allows this enzyme to receive electrons from the extracellular electron transfer system and supportL. monocytogenesgrowth. We demonstrate that this represents a generalizable mechanism by finding that aL. monocytogenesstrain engineered to express a flavinylated extracellular urocanate reductase uses urocanate by a related mechanism and to a similar effect. These studies thus identify an enzyme family that exploits a modular flavin-based electron transfer strategy to reduce distinct extracellular substrates and support a multifunctional view of the role of extracellular electron transfer activities in microbial physiology.

Extracellular electron transfer features of Gram-positive bacteria

2019 ◽  
Vol 1076 ◽  
pp. 32-47 ◽  
Author(s):  
Galina Pankratova ◽  
Lars Hederstedt ◽  
Lo Gorton
Keyword(s):  
Electron Transfer ◽  
Extracellular Electron Transfer ◽  
Gram Positive ◽  
Gram Positive Bacteria
Sign in / Sign up

Export Citation Format

Share Document