Search results for "Geobacter sulfurreducen"

showing 3 items of 3 documents

Abatement of AO7 in a divided microbial fuel cells by sequential cathodic and anodic treatment powered by different microorganisms

2017

Abstract Microbial fuel cells (MFCs) can allow the treatment of organic pollutants resistant to conventional biological processes by electro-Fenton (EF) process performed in the cathodic compartment. However, EF usually results in a partial mineralization of pollutants. Here, we have studied the possible treatment of such organics in a MFC by a sequential cathodic and anodic treatment. In particular, the treatment of an aqueous solution of Acid Orange (AO7), a largely used azoic dye resistant to conventional biological processes, was performed in the cathodic compartment of a divided MFC by EF. The process allowed the total removal of the color and the partial removal of the TOC, due mainly…

Microbial fuel cellAO7MFCGeneral Chemical EngineeringMicroorganism02 engineering and technology010501 environmental sciencesShewanella putrefaciensSettore BIO/19 - Microbiologia Generale01 natural sciencesAnalytical ChemistryCathodic protectionElectrochemistryChemical Engineering (all)Shewanella putrefacienSequential cathodic and anodic treatmentEffluentGeobacter sulfurreducens0105 earth and related environmental sciencesPollutantAqueous solutionbiologyChemistrySettore ING-IND/27 - Chimica Industriale E Tecnologica021001 nanoscience & nanotechnologybiology.organism_classificationEnvironmental chemistryGeobacter sulfurreducenInsect gut microbiota0210 nano-technologyJournal of Electroanalytical Chemistry
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The Dnmt2 RNA methyltransferase homolog of Geobacter sulfurreducens specifically methylates tRNA-Glu

2014

Dnmt2 enzymes are conserved in eukaryotes, where they methylate C38 of tRNA-Asp with high activity. Here, the activity of one of the very few prokaryotic Dnmt2 homologs from Geobacter species (GsDnmt2) was investigated. GsDnmt2 was observed to methylate tRNA-Asp from flies and mice. Unexpectedly, it had only a weak activity toward its matching Geobacter tRNA-Asp, but methylated Geobacter tRNA-Glu with good activity. In agreement with this result, we show that tRNA-Glu is methylated in Geobacter while the methylation is absent in tRNA-Asp. The activities of Dnmt2 enzymes from Homo sapiens, Drosophila melanogaster, Schizosaccharomyces pombe and Dictyostelium discoideum for methylation of the …

RNA Transfer AsptRNA MethyltransferasesMethyltransferasebiologyNucleic Acid EnzymesRNAMethylationbiology.organism_classificationMethylationDictyostelium discoideumRNA Transfer GluSubstrate SpecificityMiceBiochemistryBacterial ProteinsTransfer RNASchizosaccharomyces pombeGeneticsAnimalsHumansNucleic Acid ConformationGeobacterGeobacter sulfurreducensGeobacterNucleic Acids Research
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Succinate dehydrogenase functioning by a reverse redox loop mechanism and fumarate reductase in sulphate-reducing bacteria.

2006

Sulphate- or sulphur-reducing bacteria with known or draft genome sequences (Desulfovibrio vulgaris, Desulfovibrio desulfuricans G20, Desulfobacterium autotrophicum [draft], Desulfotalea psychrophila and Geobacter sulfurreducens) all contain sdhCAB or frdCAB gene clusters encoding succinate : quinone oxidoreductases. frdD or sdhD genes are missing. The presence and function of succinate dehydrogenase versus fumarate reductase was studied. Desulfovibrio desulfuricans (strain Essex 6) grew by fumarate respiration or by fumarate disproportionation, and contained fumarate reductase activity. Desulfovibrio vulgaris lacked fumarate respiration and contained succinate dehydrogenase activity. Succi…

chemistry.chemical_classificationbiologySulfatesSuccinate dehydrogenaseMolecular Sequence DataSuccinic AcidBacillus subtilisFumarate reductasebiology.organism_classificationMicrobiologySuccinate DehydrogenaseEnzymechemistryBiochemistryFumaratesMultigene Familybiology.proteinDesulfovibrioSDHDAmino Acid SequenceDesulfovibrio vulgarisGeobacter sulfurreducensOxidation-ReductionBacteriaMicrobiology (Reading, England)
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