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Hyphomicrobium denitrificans

ABSTRACT: Hyphomicrobium denitrificans overview

PROVIDER: PRJNA37143 | ENA |

REPOSITORIES: ENA

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			Action	DRS
		Other
	SRR071448_1.fastq.gz	Fastqsanger.gz
	SRR071448_2.fastq.gz	Fastqsanger.gz
	SRR30903994_1.fastq.gz	Fastqsanger.gz
	SRR30903994_2.fastq.gz	Fastqsanger.gz

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The response to thiosulfate availability in Hyphomicrobium denitrificans

Project description:Many sulfur-oxidizing prokaryotes oxidize sulfur compounds through a combination of initial extracytoplasmic and downstream cytoplasmic reactions. Facultative sulfur oxidizers adjust transcription to sulfur availability. While sulfur-oxidizing enzymes and transcriptional repressors have been extensively studied, sulfur import into the cytoplasm and how regulators sense external sulfur are poorly understood. Addressing this gap, we show that SoxT1A and SoxT1B, which resemble YeeE/YedE-family thiosulfate transporters and are encoded alongside sulfur oxidation and transcriptional regulation genes, fulfill these roles in the Alphaproteobacterium Hyphomicrobium denitrificans. RT-qPCR provided initial evidence that SoxT1A and SoxT1B from H. denitrificans may be intricate components of the oxidation pathway and/or involved in its transcriptional regulation. Here, we extend these analyses with genome-wide mRNA-Seq data for the reference strain, comparing transcription in the absence and presence of 2 mM thiosulfate

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Hyphomicrobium denitrificans 1NES1

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Proteome-based new insights into dimethyl sulfide metabolism of Hyphomicrobium denitrificans

Project description:To get further insights in the dimethyl sulfide metabolism of Hyphomicrobium denitrificans, a LC-MS proteomic approach was used. The total protein of three biological replicates of H. denitrificans grown on dimethyl sulfide was compared with three biological replicates grown on dimethylamine. This approach resulted in the identification of several new proteins with a potential involvement in dimethyl sulfide degradation.

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The response to thiosulfate availability in Hyphomicrobium denitrificans

Project description:The response to thiosulfate availability in Hyphomicrobium denitrificans

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Comparative Analysis of Denitrifying Activities of Hyphomicrobium nitrativorans, Hyphomicrobium denitrificans, and Hyphomicrobium zavarzinii.

Project description:Hyphomicrobium spp. are commonly identified as major players in denitrification systems supplied with methanol as a carbon source. However, denitrifying Hyphomicrobium species are poorly characterized, and very few studies have provided information on the genetic and physiological aspects of denitrification in pure cultures of these bacteria. This is a comparative study of three denitrifying Hyphomicrobium species, H. denitrificans ATCC 51888, H. zavarzinii ZV622, and a newly described species, H. nitrativorans NL23, which was isolated from a denitrification system treating seawater. Whole-genome sequence analyses revealed that although they share numerous orthologous genes, these three species differ greatly in their nitrate reductases, with gene clusters encoding a periplasmic nitrate reductase (Nap) in H. nitrativorans, a membrane-bound nitrate reductase (Nar) in H. denitrificans, and one Nap and two Nar enzymes in H. zavarzinii. Concurrently with these differences observed at the genetic level, important differences in the denitrification capacities of these Hyphomicrobium species were determined. H. nitrativorans grew and denitrified at higher nitrate and NaCl concentrations than did the two other species, without significant nitrite accumulation. Significant increases in the relative gene expression levels of the nitrate (napA) and nitrite (nirK) reductase genes were also noted for H. nitrativorans at higher nitrate and NaCl concentrations. Oxygen was also found to be a strong regulator of denitrification gene expression in both H. nitrativorans and H. zavarzinii, although individual genes responded differently in these two species. Taken together, the results presented in this study highlight the potential of H. nitrativorans as an efficient and adaptable bacterium that is able to perform complete denitrification under various conditions.

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Project description:Brachymonas denitrificans overview

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