Nitrate reduction & Fe(II) oxidation in paddy soil
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ABSTRACT:
PROVIDER: PRJEB11487 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Investigation of whole genome gene expression level changes in anaerobic, nitrate-dependent Fe(II) oxidation in the chemolithoautotrophic bacterium Thiobacillus denitrificans
2013-08-15 | GSE46339 | GEO
Project description:Investigation of whole genome gene expression level changes in anaerobic, nitrate-dependent Fe(II) oxidation in the chemolithoautotrophic bacterium Thiobacillus denitrificans Here we report on a study to identify genes associated with nitrate-dependent Fe(II) oxidation by whole-genome transcriptional (microarray) assays including the use of FeCO3, Fe2+, and U(IV) oxides as electron donors under denitrifying conditions. A 25 chip study using total RNA recovered from wild-type T. denitrificans was cultivated at 30oC under strictly anaerobic conditions with growth medium that contained 20 mM thiosulfate, 20 mM nitrate, and 30 mM bicarbonate (pH ~7) and exposed to 8 treatments. Each chip measures the expression level of 2832 ORFs with N 24-mer probe pairs (PM/MM) per gene, with three-fold technical redundancy.
2013-08-15 | E-GEOD-46339 | biostudies-arrayexpress
Project description:Pelobacter carbinolicus is phylogenetically intertwined with the Geobacteraceae, a family of deltaproteobacteria which couple oxidation of organic compounds to Fe(III) reduction. Whereas Geobacter species completely oxidize organic compounds to CO2, Pelobacter species either ferment or oxidize short chain alcohols to acetate. Pelobacter species also contain far fewer c-type cytochromes, proteins which play a role in electron transfer during Fe(III) respiration, compared to their Geobacter counterparts. Keywords: two-condition comparison
2008-05-22 | GSE8338 | GEO
Project description:Pelobacter carbinolicus is phylogenetically intertwined with the Geobacteraceae, a family of deltaproteobacteria which couple oxidation of organic compounds to Fe(III) reduction. Whereas Geobacter species completely oxidize organic compounds to CO2, Pelobacter species either ferment or oxidize short chain alcohols to acetate. Pelobacter species also contain far fewer c-type cytochromes, proteins which play a role in electron transfer during Fe(III) respiration, compared to their Geobacter counterparts. Keywords: two-condition comparison Three biological replicates were hybridized in duplicate. Experimental (FeIII) was labeled with cy5, control (acetoin) was labeled with cy3.
2008-05-21 | E-GEOD-8338 | biostudies-arrayexpress
Project description:Nitrate-reducing iron(II)-oxidizing bacteria are widespread in the environment contribute to nitrate removal and influence the fate of the greenhouse gases nitrous oxide and carbon dioxide. The autotrophic growth of nitrate-reducing iron(II)-oxidizing bacteria is rarely investigated and poorly understood. The most prominent model system for this type of studies is enrichment culture KS, which originates from a freshwater sediment in Bremen, Germany. To gain insights in the metabolism of nitrate reduction coupled to iron(II) oxidation under in the absence of organic carbon and oxygen limited conditions, we performed metagenomic, metatranscriptomic and metaproteomic analyses of culture KS. Raw sequencing data of 16S rRNA amplicon sequencing, shotgun metagenomics (short reads: Illumina; long reads: Oxford Nanopore Technologies), metagenome assembly, raw sequencing data of shotgun metatranscriptomes (2 conditions, triplicates) can be found at SRA in https://www.ncbi.nlm.nih.gov/bioproject/PRJNA682552. This dataset contains proteomics data for 2 conditions (heterotrophic and autotrophic growth conditions) in triplicates.
2021-05-17 | PXD023186 | Pride
Project description:Nitrate-reducing iron(II)-oxidizing (NDFO) bacteria are widespread in the environment contribute to nitrate removal and influence the fate of the greenhouse gases nitrous oxide and carbon dioxide. The autotrophic growth of nitrate-reducing iron(II)-oxidizing bacteria is rarely investigated and poorly understood. The most prominent model system for this type of studies is enrichment culture KS, which originates from a freshwater sediment in Bremen, Germany. A second NDFO culture, culture BP, was obtained with a sample taken in 2015 at the same pond and cultured in a similar way. To gain insights in the metabolism of nitrate reduction coupled to iron(II) oxidation under in the absence of organic carbon and oxygen limited conditions, we performed metagenomic, metatranscriptomic and metaproteomic analyses of culture BP. Raw sequencing data of 16S rRNA amplicon sequencing (V4 region with Illumina and near full-length with PacBio), shotgun metagenomics, metagenome assembly, raw sequencing data of shotgun metatranscriptomes (2 conditions, triplicates) can be found at SRA in https://www.ncbi.nlm.nih.gov/bioproject/PRJNA693457. This dataset contains proteomics data for 2 conditions in triplicates. Samples R23, R24, and R25 are grown in autotrophic conditions, samples R26, R27, and R28 in heterotrophic conditions.
2021-05-17 | PXD023710 | Pride
Project description:Geobacter sulfurreducens is a widely explored microorganism recognized by its metabolic versatility able to reduce a number of external electron acceptors. In the present study the capacity of this strain to reduce nitrate was evaluated along with its transcriptomic profile under nitrate-reducing conditions and the catalytic role of Pd nanoparticles on the reductive pathway. Results demonstrated that G. sulfurreducens was able to reduce nitrate and important kinetic differences related to the time response were found among the electron donors used (acetate and hydrogen). When using acetate, a delay response on nitrate reduction of 4 days and reduction of 94% of nitrate was achieved, while nitrite was not detected, and all the nitrogen was recovered as ammonium (79.6 ± 5.7 %). The use of hydrogen as electron donor increased 2-fold the maximum rate of nitrate reduction, leading to 93% reduction of nitrate during the first 20 h with recovery of 45% as ammonium, while nitrite was not detected. In addition, transcriptome profiling analysis of G. sulfurreducens under nitrate-reducing conditions using hydrogen or acetate as an electron donor at 2 and 6 days reveals that a core of 146 genes (69 upregulated and 77 downregulated) are differentially expressed in all conditions. Genes related to nitrogen metabolism, such as nrfA and nrfH, gdhA, and amtB, were upregulated in the incubations and RT-qPCR data confirmed upregulations of these genes. Experiments performed with biologically synthesized Pd (Bio-Pd) + G. sulfurreducens cells demonstrated synergistic input of Bio-Pd and the metabolic capacity of G. sulfurreducens. These results expand the metabolic versatility of G. sulfurreducens, which may have important implications in nitrogen cycling in natural environments and engineered systems.
2023-06-01 | GSE179298 | GEO
Project description:Genomic insights into three new provisional candidate lineages involved in nitrate and nitrite reduction in EBPR enrichment cultures
| PRJEB31762 | ENA
Project description:This SuperSeries is composed of the following subset Series: GSE21312: Gene expression in a Geobacter sulfurreducens strain adapted for faster Fe(III) oxide reduction grown with ferric citrate as an electron acceptor GSE21313: Gene expression in a Geobacter sulfurreducens strain adapted for faster Fe(III) oxide reduction grown with fumarate as an electron acceptor Refer to individual Series
2011-04-11 | E-GEOD-21322 | biostudies-arrayexpress
Project description:The conductive pili of Geobacter sulfurreducens are essential for optimal extracellular electron transfer to Fe(III) and long-range electron transport through current-producing biofilms. The KN400 strain of G. sulfurreducens reduces poorly crystalline Fe(III) oxide more rapidly than the more extensively studied DL-1 strain. Deletion of the gene for PilA, the structural pilin protein, in strain KN400 inhibited Fe(III) oxide reduction. However, slow rates of Fe(III) reduction were detected after extended (> 30 days) incubation in the presence of Fe(III) oxide. After seven consecutive transfers the PilA-deficient strain adapted to reduce Fe(III) oxide as fast as the wild type. Microarray, proteomic, and gene deletion studies indicated that this adaptation was associated with greater production of the c-type cytochrome PgcA, which was released into the culture medium. It is proposed that the extracellular cytochrome acts as an electron shuttle, promoting electron transfer from the outer cell surface to Fe(III) oxides. The adapted PilA-deficient strain competed well with the wild-type strain when both were grown together on Fe(III) oxide. However, when 50% of the culture medium was replaced with fresh medium every three days, the wild-type strain out-competed the adapted strain. A possible explanation for this is that the necessity to produce additional PgcA, to replace the PgcA continually removed, put the adapted strain at a competitive disadvantage, similar to the apparent selection against electron-shuttling producing Fe(III) reducers in most soils and sediments. Despite increased extracellular cytochrome production, the adapted PilA-deficient strain produced low levels of current; consistent with the concept that long-range electron transport through G. sulfurreducens biofilms cannot be achieved without PilA-pili.
2013-06-18 | GSE47868 | GEO