Ontology highlight
ABSTRACT:
PROVIDER: PRJEB28480 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:We cultivated the flavobacterium Zobellia galactanivorans DsijT with fresh brown macroalgae with distinct chemical compositions. Its capacity to use macroalgae as the sole carbon source via the secretion of extracellular enzymes, leading to extensive tissue damages, highlights a sharing pioneer degrader behavior. RNA-seq transcriptome analysis revealed a metabolic shift toward the utilization of brown algal polysaccharides during tissue degradation. A subset of genes was specifically induced in cells grown with intact algae compared to purified polysaccharides. It notably includes genes involved in protection against oxidative burst, type IX secretion system proteins and novel uncharacterized Polysaccharides Utilization Loci (PULs). Comparative growth experiments and genomics between Zobellia members brought out putative genetic determinants of the pioneer behavior of Z. galactanivorans, whose in vitro role could be further characterized. This work constitutes the first investigation of the metabolic mechanisms of bacteria mediating fresh macroalgae breakdown, and will help unravel the role of marine microbes in the fate of macroalgal biomass.
2022-07-27 | GSE189322 | GEO
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
Project description:Epibacterial community on marine brown macroalgae (16S rRNA gene)
| PRJNA175489 | ENA
Project description:Porites cylindrica microbiome exposed to extracts from Lobophora brown macroalgae
| PRJNA316602 | ENA
Project description:bacterium enrichment culture overview
| PRJNA327602 | ENA
Project description:Ammonia-oxidizing enrichment culture
| PRJNA289396 | ENA
Project description:By screening a collection of epigenetic compounds, we find that Lysine-Specific Demethylase 1 (LSD1) inhibitors repress brown adipocyte differentiation. RNAi-mediated Lsd1 knockdown shows similar effect, which can be rescued by expression of wild-type, but not catalytically inactive, LSD1. Furthermore, adenoviral Cre-mediated Lsd1 deletion in mice leads to inhibition of brown adipogenesis, validating the pivotal role of LSD1 in brown fat development in vivo. LSD1 represses gene expression by demethylating H3K4. To identify the target genes of LSD1 during BAT differentiation, we analyzed the H3K4me2 enrichment in preadipocyte.
2016-08-30 | GSE74901 | GEO