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Bifidobacterium breve strain:LMG 13208

ABSTRACT: Bifidobacterium breve strain:LMG 13208 Genome sequencing and assembly

PROVIDER: PRJNA239841 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	JGYR01.dat.gz	Other
	JGYR01.fasta.gz	Fasta.gz
	JGYR01.master.dat	Other
	JGYR01.dat.gz	Other

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Metabolism of sialic acid by Bifidobacterium breve UCC2003

Project description:Bifidobacteria constitute a specific group of commensal bacteria which inhabit the gastrointestinal tract of humans and other mammals. Bifidobacterium breve UCC2003 has previously been shown to utilise several plant-derived carbohydrates that include cellodextrins, starch and galactan. In the current study, we investigate the ability of this strain to utilise the mucin- and human milk oligosaccharide (HMO)-derived carbohydrate, sialic acid. Using a combination of transcriptomic and functional genomic approaches, we identified a gene cluster dedicated to the uptake and metabolism of sialic acid. Furthermore, we demonstrate that B. breve UCC2003 can cross feed on sialic acid derived from the metabolism of 3’ sialyllactose, a HMO, by Bifidobacterium bifidum PRL2010.

2014-05-29 | GSE56291 | GEO

Cross-feeding by Bifidobacterium breve UCC2003 during Bifidobacterium bifidum PRL2010 growth on a mucin-based medium.

Project description:Bifidobacteria constitute commensal bacteria that commonly inhabit the mammalian gastro intestinal tract. The gut commensal Bifidobacterium breve UCC2003 was previously shown to utilise a variety of plant/diet-derived carbohydrates, including cellodextrin, starch and galactan. In the current study, we investigated the ability of this strain to utilize (parts of) a host-derived source of carbohydrate, namely the mucin glycoprotein. Here, we demonstrate that B. breve UCC2003 exhibits growth properties in a mucin-based medium, but only when in the presence of Bifidobacterium bifidum PRL2010, which is known to metabolize mucin. Based on HPAEC analysis, transcriptome data and insertion mutagenesis, it appears that B. breve UCC2003 sustains this improved survival in co-culture by cross-feeding on a combination of fucose, sialic acid and galactose-containing oligosaccharides.

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Cellodextrin utilization by Bifidobacterium breve UCC2003

Project description:The transcription of the cldEFGC gene cluster of Bifidobacterium breve UCC2003 was shown to be induced upon growth on cellodextrins, implicating these genes in the metabolism of these sugars. Phenotypic analysis of a B. breve UCC2003::cldE insertion mutant confirmed that the cld gene cluster is exclusively required for cellodextrin utilization by this bacterium. HPAEC-PAD analysis of medium samples obtained during growth of B. breve UCC2003 on a mixture of cellodextrins revealed its ability to utilize cellobiose, cellotriose, cellotetraose and cellopentaose, with cellotriose representing the preferred substrate. The cldC gene of the cld operon of B. breve UCC2003 was shown to be the first described bifidobacterial β-glucosidase exhibiting hydrolytic activity towards various cellodextrins.

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