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ABSTRACT: Comparative genomics of Candida krusei isolates reveals intra-species diversity and technological applications

PROVIDER: PRJNA1036726 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR26710500_1.fastq.gz	Fastqsanger.gz
	SRR26710500_2.fastq.gz	Fastqsanger.gz
	SRR26710501_1.fastq.gz	Fastqsanger.gz
	SRR26710501_2.fastq.gz	Fastqsanger.gz
	SRR26710502_1.fastq.gz	Fastqsanger.gz

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Project description:Comparative genomics of Candida krusei isolates reveals intra-species diversity and technological applications

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Limosilactobacillus fermentum Limits Candida glabrata Growth by Ergosterol Depletion

Project description:Candida glabrata is a human-associated opportunistic fungal pathogen. It shares its niche with Lactobacillus spp. in the gastrointestinal and vaginal tract. In fact, Lactobacillus species are thought to competitively prevent Candida overgrowth. We investigated the molecular aspects of this antifungal effect by analyzing the interaction of C. glabrata strains with Limosilactobacillus fermentum. From a collection of clinical C. glabrata isolates, we identified strains with different sensitivities to L. fermentum in coculture. We analyzed the variation of their expression pattern to isolate the specific response to L. fermentum. C. glabrata-L. fermentum coculture induced genes associated with ergosterol biosynthesis, weak acid stress, and drug/chemical stress. L. fermentum coculture depleted C. glabrata ergosterol. The reduction of ergosterol was dependent on the Lactobacillus species, even in coculture with different Candida species. We found a similar ergosterol-depleting effect with other lactobacillus strains (Lactobacillus crispatus and Lactobacillus rhamosus) on Candida albicans, Candida tropicalis, and Candida krusei. The addition of ergosterol improved C. glabrata growth in the coculture. Blocking ergosterol synthesis with fluconazole increased the susceptibility against L. fermentum, which was again mitigated by the addition of ergosterol. In accordance, a C. glabrata Derg11 mutant, defective in ergosterol biosynthesis, was highly sensitive to L. fermentum. In conclusion, our analysis indicates an unexpected direct function of ergosterol for C. glabrata proliferation in coculture with L. fermentum.

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Divergent mitochondrial responses and metabolic signal pathways secure the azole resistance in Crabtree-positive and negative Candida species

Project description:we performed mitochondrial proteomic analysis on multiple Candida species (C. albicans, C. glabrata, C. krusei and Candida auris) and analyzed the differentially expressed mitochondrial proteins (DEMPs) between azole-sensitive and azole-resistant Candida species.

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Integrated post-genomic cell wall analysis reveals floating biofilm formation associated with high expression of flocculins in the pathogen Candida krusei.

Project description:The pathogenic yeast Candida krusei is more distantly related to Candida albicans than clinically relevant CTG-clade Candida species. Its cell wall, a dynamic organelle that is the first point of interaction between pathogen and host, is relatively understudied, and its wall proteome remains unidentified to date. Here, we present an integrated study of the cell wall in C. krusei. Our comparative genomic studies and experimental data indicate that the general structure of the cell wall in C. krusei is similar to Saccharomyces cerevisiae and C. albicans and is comprised of b-1,3-glucan, b-1,6-glucan, chitin, and mannoproteins. However, some pronounced differences with C. albicans walls were observed, for instance, higher mannan and protein levels and altered protein mannosylation patterns. Further, despite absence of proteins with high sequence similarity to Candida adhesins, protein structure modeling identified eleven proteins with similarity to flocculins/adhesins in S. cerevisiae or C. albicans. To obtain a proteomic comparison of biofilm and planktonic cells, C. krusei cells were grown to exponential phase and in static 24-h cultures. Interestingly, the 24-h static cultures of C. krusei yielded formation of floating biofilm (flor) rather than adherence to polystyrene at the bottom. The proteomic analysis of both conditions identified a total of 32 cell wall proteins. In line with a possible role in flor formation, increased abundance of flocculins, in particular Flo110, was observed in the floating biofilm compared to exponential cells. This study is the first to provide a detailed description of the cell wall in C. krusei including its cell wall proteome, and paves the way for further investigations on the importance of flor formation and flocculins in the pathogenesis of C. krusei.

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Project description:Whole genome sequencing of Candida krusei clinical bloodstream isolates

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Comparative genomics reveals intra and inter species variation in the pathogenic fungus Batrachochytrium dendrobatidis

Project description:Comparative genomics reveals intra and inter species variation in the pathogenic fungus Batrachochytrium dendrobatidis

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