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Transcriptomic analysis of Vibrio sp. dhg in different sugar media.

ABSTRACT: Transcriptomic analysis of Vibrio sp. dhg in different sugar media.

PROVIDER: PRJNA488830 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7777130_1.fastq.gz	Fastqsanger.gz
	SRR7777130_2.fastq.gz	Fastqsanger.gz
	SRR7777125_1.fastq.gz	Fastqsanger.gz
	SRR7777125_2.fastq.gz	Fastqsanger.gz
	SRR7777126_1.fastq.gz	Fastqsanger.gz

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Transcriptomic analysis of Vibrio sp. dhg in different sugar media.

Project description:Brown macroalgae holds an enormous potential as a future feedstock because it rapidly forms large biomasses and has high carbohydrate content (35% of its dry weight consists of alginate and mannitol). However, utilization of brown macroalgae by conventional microbial platforms (e.g., Escherichia coli and Saccharomyces cerevisiae) has been limited due to the inability of these platforms to metabolize alginate. Although recent studies engineered them to utilize alginate, their growth rates and metabolic activities are still too low for industrial applications, likely due to the unoptimized expression of multiple xenogeneic genes. Here, we isolated Vibrio sp. dhg, a novel, fast-growing bacterium that has been naturally evolved for efficient alginate assimilation (growth rate = 0.98 h-1). Especially, both the growth rate and sugar uptake rate of V. sp. dhg are substantially higher than the rates of E. coli for most biomass-derivable sugars. Based on our systematic characterization of its metabolism and gene expression architecture, we were able to develop a genetic toolbox for its engineering. By using this microorganism, we successfully demonstrated its ability to produce a broad spectrum of chemicals from alginate-mannitol mixtures with high productivities (1.1 g ethanol/L/h, 1.3 g 2,3-butanediol and acetoin/L/h, and 0.69 mg lycopene/L/h). Collectively, the V. sp. dhg strain is a powerful platform for the conversion of brown macroalgae sugars whose usage will dramatically accelerate the production of value-added biochemicals in the future.

2019-05-02 | GSE119357 | GEO

Metabolomics of Vibrio diabolicus grown in different culture media

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Vibrio sp. dhg

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Project description:An eight chip study using total RNA recovered from separate wild-type cultures of Thermotoga maritima at mid-log with 3 different minimal sugar media.

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Insight into Vibrio parahaemolyticus CHN25 response to artificial gastric fluid stress by transcriptomic analysis

Project description:Vibrio parahaemolyticus is the causative agent of food-borne gastroenteritis disease. Once consumed, human acid gastric fluid is perhaps one of the most important environmental stresses imposed on the bacterium. Herein, for the first time, we investigated Vibrio parahaemolyticus CHN25 response to artificial gastric fluid (AGF) stress by transcriptomic analysis. The bacterium at logarithmic growth phase (LGP) displayed lower survival rates than that at stationary growth phase (SGP) under a sub-lethal acid condition (pH 4.9). Transcriptome data revealed that 11.6% of the expressed genes in Vibrio parahaemolyticus CHN25 was up-regulated in LGP cells after exposed to AGF (pH 4.9) for 30 min, including those involved in sugar transport, nitrogen metabolism, energy production and protein biosynthesis, whereas 14.0% of the genes was down-regulated, such as ABC transporter and flagellar biosynthesis genes. In contrast, the AGF stress only elicited 3.4% of the genes from SGP cells, the majority of which were attenuated in expression. Moreover, the number of expressed regulator genes was also substantially reduced in SGP cells. Comparison of transcriptome profiles further revealed forty-one growth-phase independent genes in the AGF stress, however, half of which displayed distinct expression features between the two growth phases. Vibrio parahaemolyticus seemed to have evolved a number of molecular strategies for coping with the acid stress. The data here will facilitate future studies for environmental stresses and pathogenicity of the leading food-borne pathogen worldwide. When V.parahemolyticus CHN25 grown to log phase and stationary phase at 37°C in TSB-3% NaCl, different cultures were subsequently exposed to artificial gastric fluid at 37°C for 30 min. Two independent experiments were performed at each phase for microarray expreriments.

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