Results 31 to 40 of about 2,404 (150)

Enhanced Uranium Immobilization and Reduction by Geobacter sulfurreducens Biofilms [PDF]

Applied and Environmental Microbiology, 2014
ABSTRACT Biofilms formed by dissimilatory metal reducers are of interest to develop permeable biobarriers for the immobilization of soluble contaminants such as uranium. Here we show that biofilms of the model uranium-reducing bacterium Geobacter sulfurreducens immobilized substantially more U(VI) than ...
Dena L, Cologgi, Allison M, Speers, Blair A, Bullard, Shelly D, Kelly, Gemma, Reguera   +4 more
openaire   +2 more sources

Genetic identification of a PilT motor in Geobacter sulfurreducens reveals a role for pilus retraction in extracellular electron transfer

Frontiers in Microbiology, 2016
The metal-reducing bacterium Geobacter sulfurreducens requires the expression of conductive pili to reduce iron oxides and to wire electroactive biofilms, but the role of pilus retraction in these functions has remained elusive.
Allison Speers, Bryan D Schindler, Bryan D Schindler, Jihwan Hwang, Jihwan Hwang, Aycin Genc, Aycin Genc, Gemma Reguera   +7 more
doaj   +1 more source

Aromatic Amino Acids Required for Pili Conductivity and Long-Range Extracellular Electron Transport in Geobacter sulfurreducens

mBio, 2013
It has been proposed that Geobacter sulfurreducens requires conductive pili for long-range electron transport to Fe(III) oxides and for high-density current production in microbial fuel cells. In order to investigate this further, we constructed a strain
Madeline Vargas, Nikhil S. Malvankar, Pier-Luc Tremblay, Ching Leang, Jessica A. Smith, Pranav Patel, Oona Synoeyenbos-West, Kelly P. Nevin, Derek R. Lovley   +8 more
doaj   +1 more source

Biochemical Capacitance of Geobacter Sulfurreducens Biofilms

ChemSusChem, 2015
AbstractAn electrical model able to decouple the electron pathway from microbial cell machinery impedance terms is introduced. In this context, capacitance characteristics of the biofilm are clearly resolved. In other words, the model allows separating, according to the advantage of frequency and spectroscopic response approach, the different terms ...
Bueno, Paulo R., Schrott, Germán D., Bonanni, Pablo S., Simison, Silvia N., Busalmen, Juan P.   +4 more
openaire   +4 more sources

Recent Origin of the Methacrylate Redox System in Geobacter sulfurreducens AM-1 through Horizontal Gene Transfer.

PLoS ONE, 2015
The origin and evolution of novel biochemical functions remains one of the key questions in molecular evolution. We study recently emerged methacrylate reductase function that is thought to have emerged in the last century and reported in Geobacter ...
Oksana V Arkhipova, Margarita V Meer, Galina V Mikoulinskaia, Marina V Zakharova, Alexander S Galushko, Vasilii K Akimenko, Fyodor A Kondrashov   +6 more
doaj   +1 more source

Geobacter Protein Nanowires

Frontiers in Microbiology, 2019
The study of electrically conductive protein nanowires in Geobacter sulfurreducens has led to new concepts for long-range extracellular electron transport, as well as for the development of sustainable conductive materials and electronic devices with ...
Derek R. Lovley, David J. F. Walker
doaj   +1 more source

Geobacter sulfurreducens electroactive biofilms on Fe2O3/FTO support-electrodes for developing a sodium acetate electrochemical biosensor

Biosensors and Bioelectronics: X, 2023
Geobacter sulfurreducens is an essential microorganism in biogeochemical cycles. It is used biotechnologically in bioremediation and electricity production. The importance of G.
G.A. Huerta-Miranda, L.M. Rodríguez-Torres, A.L. Martínez-García, D.A. Mazón-Montijo, A. Hernández-Eligio, M. Miranda-Hernández, K. Juárez   +6 more
doaj   +1 more source

Proteome of Geobacter sulfurreducens in the presence of U(VI)

Microbiology, 2014
Geobacter species often play an important role in the in situ bioremediation of uranium-contaminated groundwater, but little is known about how these microbes avoid uranium toxicity. To evaluate this further, the proteome of Geobacter sulfurreducens exposed to 100 µM U(VI) acetate was compared to control cells not exposed to U(VI ...
Roberto, Orellana, Kim K, Hixson, Sean, Murphy, Tünde, Mester, Manju L, Sharma, Mary S, Lipton, Derek R, Lovley   +6 more
openaire   +2 more sources

Syntrophic Growth via Quinone-Mediated Interspecies Electron Transfer

Frontiers in Microbiology, 2015
The mechanisms by which microbial species exchange electrons are of interest because interspecies electron transfer can expand the metabolic capabilities of microbial communities.
Jessica A Smith, Kelly eNevin, Derek R Lovley   +2 more
doaj   +1 more source

Structural and operational complexity of the Geobacter sulfurreducens genome [PDF]

Genome Research, 2010
Prokaryotic genomes can be annotated based on their structural, operational, and functional properties. These annotations provide the pivotal scaffold for understanding cellular functions on a genome-scale, such as metabolism and transcriptional regulation.
Lovley, Derek, Qiu, Yu, Cho, Byung-Kwan, Park, Young S, Palsson, Bernhard Ø, Zengler, Karsten   +5 more
openaire   +3 more sources