Self-assembly of complex hollow CuS nano/micro shell by an electrochemically active bacterium Shewanella oneidensis MR-1

2017 ◽  
Vol 116 ◽  
pp. 10-16 ◽  
Author(s):  
Xiang Xiao ◽  
Qiu-Yue Liu ◽  
Xue-Rong Lu ◽  
Ting-Ting Li ◽  
Xiao-Li Feng ◽  
...  
Keyword(s):  
Self Assembly ◽  
Shewanella Oneidensis ◽  
Electrochemically Active ◽  
Active Bacterium

scholarly journals Shewanella oneidensis MR-1 as a bacterial platform for electro-biotechnology

2021 ◽  
Author(s):  
Sota Ikeda ◽  
Yuki Takamatsu ◽  
Miyu Tsuchiya ◽  
Keigo Suga ◽  
Yugo Tanaka ◽  
...  
Keyword(s):  
Heterotrophic Bacteria ◽  
Shewanella Oneidensis ◽  
Value Added ◽  
Global Carbon Cycle ◽  
Future Directions ◽  
Redox States ◽  
Fundamental Knowledge ◽  
Electrochemically Active ◽  
Active Bacterium ◽  
Global Carbon

Abstract The genus Shewanella comprises over 70 species of heterotrophic bacteria with versatile respiratory capacities. Some of these bacteria are known to be pathogens of fishes and animals, while many are non-pathogens considered to play important roles in the global carbon cycle. A representative strain is Shewanella oneidensis MR-1 that has been intensively studied for its ability to respire diverse electron acceptors, such as oxygen, nitrate, sulfur compounds, metals, and organics. In addition, studies have been focused on its ability as an electrochemically active bacterium that is capable of discharging electrons to and receiving electrons from electrodes in bioelectrochemical systems (BESs) for balancing intracellular redox states. This ability is expected to be applied to electro-fermentation (EF) for producing value-added chemicals that conventional fermentation technologies are difficult to produce efficiently. Researchers are also attempting to utilize its electrochemical ability for controlling gene expression, for which electro-genetics (EG) has been coined. Here we review fundamental knowledge on this bacterium and discuss future directions of studies on its applications to electro-biotechnology (EB).

A new electrochemically active bacterium phylogenetically related to Tolumonas osonensis and power performance in MFCs

2013 ◽  
Vol 139 ◽  
pp. 141-148 ◽  
Author(s):  
Jianmei Luo ◽  
Jia Yang ◽  
Huanhuan He ◽  
Tao Jin ◽  
Li Zhou ◽  
...  
Keyword(s):  
Power Performance ◽  
Electrochemically Active ◽  
Active Bacterium

scholarly journals A novel growth and isolation medium for exoelectrogenic bacteria

2021 ◽  
Author(s):  
Zumaira Nazeer ◽  
Eustace Fernando
Keyword(s):  
Growth Medium ◽  
Solid Medium ◽  
Shewanella Oneidensis ◽  
Extracellular Electron Transfer ◽  
The Novel ◽  
Isolation Medium ◽  
Biochemical Characterisation ◽  
Electrochemically Active ◽  
Colour Changes ◽  
Exoelectrogenic Bacteria

A microbiological isolation and growth medium that can effectively discriminate electrochemically active exoelectrogenic bacteria from other non-exoelectrogenic bacteria, is currently unavailable. In this study, we developed a novel chromogenic growth and isolation solid medium based on MnO2 that can selectively allow the growth of exoelectrogenic bacteria and change the medium colour in the process. Known exoelectrogenic bacteria such as Shewanella oneidensis MR1 and other such bacteria from functional microbial fuel cell (MFC) anodes were capable of growing and changing colour in the novel growth medium. On the contrary, non-exoelectrogenic bacteria such as Escherichia coli ATCC 25922 were incapable of growing and inducing a colour changes in the novel medium. Further biochemical characterisation of these isolated exoelectrogenic bacteria by Raman micro-spectroscopy demonstrated that these bacteria over express cytochrome proteins that are vital in extracellular electron transfer events. This medium is a convenient method to isolate exoelectrogenic bacteria from complex environmental samples.

Characterization of a new electrochemically active bacterium, Lysinibacillus sphaericus D-8, isolated with a WO3 nanocluster probe

2014 ◽  
Vol 49 (2) ◽  
pp. 290-294 ◽  
Author(s):  
Hui He ◽  
Shi-Jie Yuan ◽  
Zhong-Hua Tong ◽  
Yu-Xi Huang ◽  
Zhi-Qi Lin ◽  
...  
Keyword(s):  
Lysinibacillus Sphaericus ◽  
Electrochemically Active ◽  
Active Bacterium

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.

scholarly journals Stable sub-complexes observedin situsuggest a modular assembly pathway of the bacterial flagellar motor

2018 ◽  
Author(s):  
Mohammed Kaplan ◽  
Poorna Subramanian ◽  
Debnath Ghosal ◽  
Catherine M. Oikonomou ◽  
Sahand Pirbadian ◽  
...  
Keyword(s):  
Legionella Pneumophila ◽  
Self Assembly ◽  
Protein Localization ◽  
Shewanella Oneidensis ◽  
Flagellar Motor ◽  
Inner Membrane ◽  
Assembly Mechanism ◽  
Alternate Model ◽  
Bacterial Flagellar Motor ◽  
Spatio Temporal

AbstractThe self-assembly of cellular macromolecular machines such as the bacterial flagellar motor requires the spatio-temporal synchronization of gene expression, protein localization and association of a dozen or more unique components. InSalmonellaandEscherichia coli, a sequential, outward assembly mechanism has been proposed for the flagellar motor starting from the inner membrane, with each subsequent component stabilizing the last. Here, using electron cryo-tomography of intactLegionella pneumophila,Pseudomonas aeruginosaandShewanella oneidensiscells, we observe stable outer-membrane-embedded sub-complexes of the flagellar motor. These sub-complexes consist of the periplasmic embellished P- and L-rings, in the absence of other flagellar components, and bend the membrane inward dramatically. Additionally, we also observe independent inner-membrane sub-complexes consisting of the C- and MS-rings and export apparatus. These results suggest an alternate model for flagellar motor assembly in which outer- and inner-membrane-associated sub-complexes form independently and subsequently join, enabling later steps of flagellar production to proceed.

scholarly journals Rapid production of Pd nanoparticle by a marine electrochemically active bacterium Shewanella sp. CNZ-1 and its catalytic performance on 4-nitrophenol reduction

RSC Advances ◽  
2017 ◽  
Vol 7 (65) ◽  
pp. 41182-41189 ◽  
Author(s):  
Haikun Zhang ◽  
Xiaoke Hu
Keyword(s):  
Catalytic Performance ◽  
Pd Nanoparticle ◽  
Nitrophenol Reduction ◽  
Electrochemically Active ◽  
Rapid Production ◽  
Active Bacterium ◽  
Physical And Chemical

Microbial recovery of Pd through Pd(ii) reduction is emerging as a clean alternative to traditional physical and chemical reclaiming treatments.

scholarly journals Draft Genome Sequence ofEnterobactersp. Strain EA-1, an Electrochemically Active Microorganism Isolated from Tropical Sediment

2018 ◽  
Vol 6 (9) ◽  
Author(s):  
Lucinda E. Doyle ◽  
Rohan B. H. Williams ◽  
Scott A. Rice ◽  
Enrico Marsili ◽  
Federico M. Lauro
Keyword(s):  
East Asia ◽  
Genome Assembly ◽  
Draft Genome ◽  
Genome Comparison ◽  
Whole Genome ◽  
Content Type ◽  
Draft Genome Assembly ◽  
Electrochemically Active ◽  
Active Bacterium ◽  
Whole Genome Comparison

ABSTRACTEnterobactersp. strain EA-1 is an electrochemically active bacterium isolated from tropical sediment in Singapore. Here, the annotated draft genome assembly of the bacterium is reported. Whole-genome comparison indicates thatEnterobactersp. EA-1, along with a previously sequencedEnterobacterisolate from East Asia, forms a distinct clade within theEnterobactergenus.

Molecular mechanisms regulating the catabolic and electrochemical activities of Shewanella oneidensis MR-1

2021 ◽  
Author(s):  
Atsushi Kouzuma
Keyword(s):  
Microbial Fuel Cells ◽  
Biofilm Formation ◽  
Molecular Mechanisms ◽  
Current Knowledge ◽  
Shewanella Oneidensis ◽  
Extracellular Electron Transfer ◽  
Cellular Functions ◽  
Regulatory Systems ◽  
Electrochemically Active ◽  
Recent Developments

Abstract Electrochemically active bacteria (EAB) interact electrochemically with electrodes via extracellular electron transfer (EET) pathways. These bacteria have attracted significant attention due to their utility in environment-friendly bioelectrochemical systems (BESs), e.g. microbial fuel cells and electrofermentation systems. The electrochemical activity of EAB is dependent on their carbon catabolism and respiration; thus, understanding how these processes are regulated will provide insights into the development of a more efficient BES. The process of biofilm formation by EAB on BES electrodes is also important for electric current generation, because it facilitates physical and electrochemical interactions between EAB cells and electrodes. This article summarizes the current knowledge on EET-related metabolic and cellular functions of a model EAB, Shewanella oneidensis MR-1, focusing specifically on regulatory systems for carbon catabolism, EET pathways, and biofilm formation. Based on recent developments, the author also discusses potential uses of engineered S. oneidensis strains for various biotechnological applications.

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