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Uncultured anaerobic ammonium-oxidizing bacterium

ABSTRACT: anammox microbial aggregates Raw sequence reads

PROVIDER: PRJNA358863 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR5135130.fastq.gz	Fastqsanger.gz
	SRR5135131.fastq.gz	Fastqsanger.gz
	SRR5135132.fastq.gz	Fastqsanger.gz
	SRR5135133.fastq.gz	Fastqsanger.gz
	SRR5135096.fastq.gz	Fastqsanger.gz

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uncultured anaerobic ammonium-oxidizing bacterium

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Draft Genome Sequence of a Novel Marine Anaerobic Ammonium-Oxidizing Bacterium, "Candidatus Scalindua sp."

Project description:A novel anaerobic ammonium-oxidizing (anammox) bacterium was detected in an upflow column reactor treating synthetic nitrogen-rich saline solution. Here, we assembled a 4.59-Mb draft genome sequence of this bacterium, identified as a member of the genus "Candidatus Scalindua," that has 84% nucleotide-level genomic similarity with the closest related anammox bacterium ("Candidatus Scalindua rubra").

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Nitric oxide-dependent anaerobic ammonium oxidation

Project description:Nitric oxide (NO) has several important functions in biology and atmospheric chemistry as a toxin, signaling molecule, ozone depleting agent and the precursor of the greenhouse gas nitrous oxide (N2O). Even though NO is a potent oxidant, and was available on earth earlier than oxygen, its direct use by microorganisms for growth was not demonstrated before. Using physiological experiments, metatranscriptomics and metaproteomics, here we show that anaerobic ammonium-oxidizing (anammox) bacterium Kuenenia stuttgartiensis grow by coupling ammonium oxidation to NO reduction, and produce only N2. Such a metabolism could have existed on early earth, and has implications in controlling N2O and NO emissions both from natural and manmade ecosystems, where anammox bacteria contribute significantly to N2 release to the atmosphere.

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Evaluation of Edaphic Microbial Ammonium Oxidizing Communities during a Yellow Potato Cycle Culture

Project description:This study evaluated the ammonium oxidizing communities (COA) associated with a potato crop (Solanum phureja) rhizosphere soil in the savannah of Bogotá (Colombia) by examining the presence and abundance of amoA enzyme genes and transcripts by qPCR and next-generation sequence analysis. amoA gene abundance could not be quantified by qPCR due to problems inherent in the primers; however, the melting curve analysis detected increased fluorescence for Bacterial communities but not for Archaeal communities. Transcriptome analysis by next-generation sequencing revealed that the majority of reads mapped to ammonium-oxidizing Archaea, suggesting that this activity is primarily governed by the microbial group of the Crenarchaeota phylum. In contrast,a lower number of reads mapped to ammonia-oxidizing bacteria.

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Project description:Anaerobic ammonium-oxidizing (anammox) bacteria have been recognized as an important sink for fixed nitrogen and are detected in many natural environments. However, their presence in terrestrial ecosystems has long been overlooked, and their contribution to the nitrogen cycling in natural and agricultural soils is currently unknown. Here we describe the enrichment and characterization of anammox bacteria from a nitrogen-loaded peat soil. After 8 months of incubation with the natural surface water of the sampling site and increasing ammonium and nitrite concentrations, anammox cells constituted 40 to 50% of the enrichment culture. The two dominant anammox phylotypes were affiliated with "Candidatus Jettenia asiatica" and "Candidatus Brocadia fulgida." The enrichment culture converted NH(4)(+) and NO(2)(-) to N(2) with the previously reported stoichiometry (1:1.27) and had a maximum specific anaerobic ammonium oxidation rate of 0.94 mmol NH(4)(+)·g (dry weight)(-1)·h(-1) at pH 7.1 and 32°C. The diagnostic anammox-specific lipids were detected at a concentration of 650 ng·g (dry weight)(-1), and pentyl-[3]-ladderane was the most abundant ladderane lipid.

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