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Bifidobacterium longum subsp. infantis CCUG 52486

ABSTRACT: Reference genome for the Human Microbiome Project

PROVIDER: PRJNA30065 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	ABQQ01.dat.gz	Other
	ABQQ01.fasta.gz	Fasta.gz
	ABQQ01.master.dat	Other
	SRR015594.fastq.gz	Fastqsanger.gz
	SRR015595.fastq.gz	Fastqsanger.gz

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Bifidobacterium longum subsp. infantis (B. infantis) strain dependent utilization of human milk oligosaccharides

Project description:Bifidobacterium longum subsp. infantis (B. infantis) colonizes the infant gut microbiome with a 43-kb gene cluster that enables human milk oligosaccharide (HMO) utilization. Although there is relative genomic homogeneity in this regard, previous observations suggest that B. infantis strains may differ in their utilization phenotype. To test this hypothesis, a panel of B. infantis strains were evaluated for their ability to utilize pooled HMOs to yield differential phenotypes including biomass accumulation, HMO consumption glycoprofile, end-product secretion, and global transcriptomes. Two strains (ATCC 15697 and UMA301) efficiently consumed several HMO isomers/anomers that exhibit degrees of polymerization (DP) ³ 4. These same strains partially consumed the smaller DP HMOs including fucosyllactose and lactodifucotetraose isomers/anomers. In contrast, UMA299 efficiently utilized fucosylated small molecular weight HMOs (DP<4), and accumulated greater biomass on purified 2´FL with significantly higher 1,2-propanediol production. This study identifies several strain-dependent features in HMO utilization phenotypes that are consistent with metabolic variation within a bifidobacterial-dominated infant-gut microbiome.

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Project description:The purpose of this project was to determine the whole transcriptome response of Bifidobacterium longum subsp. Infantis to pooled and individual human milk oligosaccharides (HMO) relative to lactose Bacterial isolates grown on lactose, pooled human milk oligosaccharides (HMO), lacto-N-tetraose (LNT), lacto-N-neotetraose (LNnT), 2âfucosyllactose (2âFL), 3-fucosyllactose (3FL), and 6âsialyllactose (6âSL). RNA was extracted and sequenced, in duplicate, on an Illumina HiSeq. Early, mid, and late timepoints in response to pooled HMO were additionally sequenced in duplicate.

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