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Nitrosospira multiformis

ABSTRACT: Ammonia-oxidizing bacterium

PROVIDER: PRJNA35715 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	QAOK01.dat.gz	Other
	QAOK01.fasta.gz	Fasta.gz
	QAOK01.master.dat	Other
	SRR4235490_1.fastq.gz	Fastqsanger.gz

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Nitrosospira multiformis ATCC 25196

Project description:Ammonia-oxidizing bacterium

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Nitrosospira sp. NRS527

Project description:Whole-genome sequence of ammonia-oxidizing bacterium Nitrosospira sp. strain NRS527

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An N-acyl homoserine lactone synthase in the ammonia-oxidizing bacterium Nitrosospira multiformis.

Project description:The chemolithoautotrophic bacterium Nitrosospira multiformis is involved in affecting the process of nitrogen cycling. Here we report the existence and characterization of a functional quorum sensing signal synthase in N. multiformis. One gene (nmuI) playing a role in generating a protein with high levels of similarity to N-acyl homoserine lactone (AHL) synthase protein families was identified. Two AHLs (C14-AHL and 3-oxo-C14-AHL) were detected using an AHL biosensor and liquid chromatography-mass spectrometry (LC-MS) when nmuI, producing a LuxI homologue, was introduced into Escherichia coli. However, by extracting N. multiformis culture supernatants with acidified ethyl acetate, no AHL product was obtained that was capable of activating the biosensor or being detected by LC-MS. According to reverse transcription-PCR, the nmuI gene is transcribed in N. multiformis, and a LuxR homolog (NmuR) in this ammonia-oxidizing strain showed great sensitivity to long-chain AHL signals by solubility assay. A degradation experiment demonstrated that the absence of AHL signals might be attributed to the possible AHL-inactivating activities of this strain. To summarize, an AHL synthase gene (nmuI) acting as a long-chain AHL producer has been found in a chemolithotrophic ammonia-oxidizing microorganism, and the results provide an opportunity to complete the knowledge of the regulatory networks in N. multiformis.

| S-EPMC3911186 | biostudies-literature

Nitrosomonas eutropha

Project description:Ammonia-oxidizing bacterium

| PRJNA35717 | ENA

Nitrosomonas europaea

Project description:Ammonia-oxidizing bacterium

| PRJNA35065 | ENA

Nitrosococcus oceani

Project description:Ammonia-oxidizing bacterium

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Nitrosomonas eutropha C91

Project description:Ammonia-oxidizing bacterium

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Complete genome sequence of Nitrosospira multiformis, an ammonia-oxidizing bacterium from the soil environment.

Project description:The complete genome of the ammonia-oxidizing bacterium Nitrosospira multiformis (ATCC 25196(T)) consists of a circular chromosome and three small plasmids totaling 3,234,309 bp and encoding 2,827 putative proteins. Of the 2,827 putative proteins, 2,026 proteins have predicted functions and 801 are without conserved functional domains, yet 747 of these have similarity to other predicted proteins in databases. Gene homologs from Nitrosomonas europaea and Nitrosomonas eutropha were the best match for 42% of the predicted genes in N. multiformis. The N. multiformis genome contains three nearly identical copies of amo and hao gene clusters as large repeats. The features of N. multiformis that distinguish it from N. europaea include the presence of gene clusters encoding urease and hydrogenase, a ribulose-bisphosphate carboxylase/oxygenase-encoding operon of distinctive structure and phylogeny, and a relatively small complement of genes related to Fe acquisition. Systems for synthesis of a pyoverdine-like siderophore and for acyl-homoserine lactone were unique to N. multiformis among the sequenced genomes of ammonia-oxidizing bacteria. Gene clusters encoding proteins associated with outer membrane and cell envelope functions, including transporters, porins, exopolysaccharide synthesis, capsule formation, and protein sorting/export, were abundant. Numerous sensory transduction and response regulator gene systems directed toward sensing of the extracellular environment are described. Gene clusters for glycogen, polyphosphate, and cyanophycin storage and utilization were identified, providing mechanisms for meeting energy requirements under substrate-limited conditions. The genome of N. multiformis encodes the core pathways for chemolithoautotrophy along with adaptations for surface growth and survival in soil environments.

| S-EPMC2423025 | biostudies-literature

Transcriptional expressions of Nitrosomonas europae after CeO2 nanoparticle exposure and 12-h recovery

Project description:To further explore the biotoxicity mechanisms of CeO2 nanoparticles (NPs) and the recovery strategies of the according impaired Nitrosomonas europaea (N. europaea, ATCC 19718) cells, a genome-sequenced model ammonia oxidizing bacterium (AOB) commonly detected in the activated sludge of biological wastewater treatment plants, the whole-genome microarray analysis was applied to retrieve the induced transcriptional responses, after their physiological and metabolic activities were evealed.

2018-11-28 | GSE122972 | GEO

Functional gene expressions of continuously cultured Nitrosomonas europae after ZnO nanoparticles exposure and recovery incubation

Project description:To further explore the biotoxicity mechanisms of zinc oxide nanoparticles (ZnO NPs) and the recovery strategies of the accordingly impaired Nitrosomonas europaea (N. europaea, ATCC 19718) cells, a genome-sequenced model ammonia-oxidizing bacterium (AOB) commonly detected in the activated sludge of biological wastewater treatment plants, whole-genome microarray analysis was applied to retrieve the induced transcriptional responses, after their physiological and metabolic activities were revealed.

2016-06-24 | GSE83683 | GEO

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