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Nitrobacter winogradskyi

ABSTRACT: Nitrite-oxidizing bacterium

PROVIDER: PRJNA35575 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	BJNF01.dat.gz	Other
	BJNF01.fasta.gz	Fasta.gz
	BJNF01.master.dat	Other
	JALJZS01.dat.gz	Other

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Nitrobacter winogradskyi Nb-255

Project description:Nitrite-oxidizing bacterium

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Nitrobacter winogradskyi transcriptomic response to ammonia

Project description:The comparison was done in chemostats. Cultures maintained nitrite. The transcritome responses were compared at three ammonium concentrations.

2015-02-20 | GSE58053 | GEO

Nitrobacter hamburgensis

Project description:Nitrite-oxidizing soil bacterium

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Nitrobacter winogradskyi transcriptomic response to ammonia

Project description:The comparison was done in chemostats. Cultures maintained nitrite. The transcritome responses were compared at three ammonium concentrations. The comparison was done in chemostats. Single cultures maintained with 60 mM nitrite, and the ammonium supllemented as appropiate.

2015-02-20 | E-GEOD-58053 | biostudies-arrayexpress

Nitrobacter hamburgensis X14

Project description:Nitrite-oxidizing soil bacterium

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Nitrobacter sp. Nb-311A

Project description:Nitrite-oxidizing marine bacterium

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Ammonia stimulates growth and nitrite-oxidizing activity of Nitrobacter winogradskyi.

Project description:The aim of this study was to obtain a nitrite-oxidizing bacterium with high nitrite oxidation activity for controlling nitrite levels. A nitrite-oxidizing bacterium, ZS-1, was isolated from the water of a coastal Pseudosciaena crocea-rearing pond. The strain was identified as Nitrobacter winogradskyi based on the phylogenetic analyses of the 16S ribosomal ribonucleic acid gene and nxrA sequence of ZS-1. Under aerobic condition, the nitrite-oxidizing activity of ZS-1 did not change considerably in the range of pH 7-9, but was strongly inhibited by lower (pH = 6) and higher (pH = 10) pH values. The optimum temperature range is 25-32 °C. Lower temperature made the adaptive phase of ZS-1 longer but did not affect its maximum nitrite oxidization rate. The nitrite-oxidizing activity of ZS-1 started to be inhibited by ammonia and nitrate when the concentrations of ammonia and nitrate reached 25 mg L-1 and 100 mg L-1, respectively. The inhibition was stronger with higher concentration of ammonia or nitrate. The nitrite-oxidizing activity of ZS-1, however, was not inhibited by high concentration of nitrite (500 mg L-1). The nitrite-oxidizing activity of ZS-1 was increased by low ammonia concentration (1 mg L-1 to 10 mg L-1).

| S-EPMC4433873 | biostudies-literature

A New Acyl-homoserine Lactone Molecule Generated by Nitrobacter winogradskyi.

Project description:It is crucial to reveal the regulatory mechanism of nitrification to understand nitrogen conversion in agricultural systems and wastewater treatment. In this study, the nwiI gene of Nitrobacter winogradskyi was confirmed to be a homoserine lactone synthase by heterologous expression in Escherichia coli that synthesized several acyl-homoserine lactone signals with 7 to 11 carbon acyl groups. A novel signal, 7, 8-trans-N-(decanoyl) homoserine lactone (C10:1-HSL), was identified in both N. winogradskyi and the recombined E. coli. Furthermore, this novel signal also triggered variances in the nitrification rate and the level of transcripts for the genes involved in the nitrification process. These results indicate that quorum sensing may have a potential role in regulating nitrogen metabolism.

| S-EPMC4786786 | biostudies-literature

Nitrospira marina

Project description:Nitrite-oxidizing bacterium

| PRJNA35535 | ENA

Quorum Quenching of Nitrobacter winogradskyi Suggests that Quorum Sensing Regulates Fluxes of Nitrogen Oxide(s) during Nitrification.

Project description:Quorum sensing (QS) is a widespread process in bacteria used to coordinate gene expression with cell density, diffusion dynamics, and spatial distribution through the production of diffusible chemical signals. To date, most studies on QS have focused on model bacteria that are amenable to genetic manipulation and capable of high growth rates, but many environmentally important bacteria have been overlooked. For example, representatives of proteobacteria that participate in nitrification, the aerobic oxidation of ammonia to nitrate via nitrite, produce QS signals called acyl-homoserine lactones (AHLs). Nitrification emits nitrogen oxide gases (NO, NO2, and N2O), which are potentially hazardous compounds that contribute to global warming. Despite considerable interest in nitrification, the purpose of QS in the physiology/ecology of nitrifying bacteria is poorly understood. Through a quorum quenching approach, we investigated the role of QS in a well-studied AHL-producing nitrite oxidizer, Nitrobacter winogradskyi.We added a recombinant AiiA lactonase to N. winogradskyi cultures to degrade AHLs to prevent their accumulation and to induce a QS-negative phenotype and then used mRNA sequencing (mRNA-Seq) to identify putative QS-controlled genes. Our transcriptome analysis showed that expression of nirK and nirK cluster genes (ncgABC) increased up to 19.9-fold under QS-proficient conditions (minus active lactonase). These data led to us to query if QS influenced nitrogen oxide gas fluxes in N. winogradskyi. Production and consumption of NOx increased and production of N2O decreased under QS-proficient conditions. Quorum quenching transcriptome approaches have broad potential to identify QS-controlled genes and phenotypes in organisms that are not genetically tractable.

2016-10-05 | GSE84969 | GEO

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