Results 1 to 10 of about 499,967 (230)

Electron Transfer in the Biogeochemical Sulfur Cycle

Life
Microorganisms are key players in the global biogeochemical sulfur cycle. Among them, some have garnered particular attention due to their electrical activity and ability to perform extracellular electron transfer.
Xuliang Zhuang, Shijie Wang, Shanghua Wu
doaj   +1 more source

Identification, Expression and Activity of Candidate Nitrite Reductases From Orange Beggiatoaceae, Guaymas Basin

Frontiers in Microbiology, 2019
Orange filamentous Beggiatoaceae form massive microbial mats on hydrothermal sediments in Guaymas Basin; these bacteria are considered to oxidize sulfide with nitrate and nitrite as electron acceptors.
Andrew Buckley, Barbara MacGregor, Andreas Teske   +2 more
doaj   +1 more source

To be or not to be a cytochrome: electrical characterizations are inconsistent with Geobacter cytochrome ‘nanowires’

Frontiers in Microbiology
Geobacter sulfurreducens profoundly shapes Earth’s biogeochemistry by discharging respiratory electrons to minerals and other microbes through filaments of a two-decades-long debated identity. Cryogenic electron microscopy has revealed filaments of redox-
Matthew J. Guberman-Pfeffer
doaj   +1 more source

Widespread Distribution and Functional Specificity of the Copper Importer CcoA: Distinct Cu Uptake Routes for Bacterial Cytochrome c Oxidases

mBio, 2018
Cytochrome c oxidases are members of the heme-copper oxidase superfamily. These enzymes have different subunits, cofactors, and primary electron acceptors, yet they all contain identical heme-copper (CuB) binuclear centers within their catalytic subunits.
Bahia Khalfaoui-Hassani, Hongjiang Wu, Crysten E. Blaby-Haas, Yang Zhang, Federica Sandri, Andreia F. Verissimo, Hans-Georg Koch, Fevzi Daldal   +7 more
doaj   +1 more source

Novel nitrite reductase domain structure suggests a chimeric denitrification repertoire in the phylum Chloroflexi

MicrobiologyOpen, 2022
Denitrification plays a central role in the global nitrogen cycle, reducing and removing nitrogen from marine and terrestrial ecosystems. The flux of nitrogen species through this pathway has a widespread impact, affecting ecological carrying capacity ...
Sarah L. Schwartz, Lily Momper, Luiz Thiberio Rangel, Cara Magnabosco, Jan P. Amend, Gregory P. Fournier   +5 more
doaj   +1 more source

Electrostatic interaction of cytochrome c with cytochrome c1 and cytochrome oxidase.

Journal of Biological Chemistry, 1981
The reactions of horse heart cytochrome c with succinate-cytochrome c reductase and cytochrome oxidase were studied as a function of ionic strength using both spectrophotometric and oxygen electrode assay techniques. The kinetic parameter Vmax/Km for both reactions decreased very rapidly as the ionic strength was increased, indicating that ...
H T, Smith, A J, Ahmed, F, Millett
openaire   +2 more sources

Iron Corrosion via Direct Metal-Microbe Electron Transfer

mBio, 2019
The concept that anaerobic microorganisms can directly accept electrons from Fe(0) has been controversial because direct metal-microbe electron transfer has previously only been indirectly inferred.
Hai-Yan Tang, Dawn E. Holmes, Toshiyuki Ueki, Paola A. Palacios, Derek R. Lovley   +4 more
doaj   +1 more source

PERFIL DE SENSIBILIDAD DE HEP-G2 COMO MODELO PARA EVALUACIÓN DE ACTIVIDAD CITOTÓXICA DE XENOBIÓTICOS BIOACTIVADOS VIA CYP450 SENSITIVILITY PROFILE HEP-G2 AS A MODEL OF CYTOTOXIC ACTIVITY DETERMINATION OF BIOACTIVATED XENOBIOTICS VIA CYP450

Vitae, 2009
Para establecer la acción anticancerígena se han propuesto numerosas metodologías, principalmente enfocadas en la valoración de la citotoxicidad in vitro sobre líneas celulares neoplásicas derivadas de diferentes tipos de cáncer humano; sin embargo, gran
Stephanie O PRIETO, Fabio A ARISTIZÁBAL G   +1 more
doaj  

Electrochemical Characterization of the Periplasmic PpcA c‐Cytochrome of Geobacter sulfurreducens Reveals Its Affinity for Uranium

ChemElectroChem, 2023
Geobacter bacteria produce conductive pili appendages and an outer membrane‐anchored lipopolysaccharide to immobilize uranium extracellularly. Yet, some radionuclide enters the cell envelope, where is rapidly mineralized by periplasmic c‐cytochromes.
Dr. Bhushan P. Awate, Prof. Robert M. Worden, Prof. Gemma Reguera   +2 more
doaj   +1 more source

Cytochrome “nanowires” are physically limited to sub-picoamp currents that suffice for cellular respiration

Frontiers in Chemistry
Mineral-respiring microorganisms from hydrothermal vents to terrestrial soils express filaments that electrically connect intracellular respiration to extracellular geochemistry. Filaments dubbed “cytochrome nanowires” (CNs) have been resolved by CryoEM,
Matthew J. Guberman-Pfeffer, Caleb L. Herron   +1 more
doaj   +1 more source