PUL ID

PUL0576

PubMed

20974960, Proc Natl Acad Sci U S A. 2010 Nov 9;107(45):19514-9. doi: 10.1073/pnas.1011100107. Epub 2010 Oct 25.

Characterization method

growth assay

Genomic accession number

CP001840.1

Nucelotide position range

1236100-1248439

Substrate

mucin,human milk oligosaccharide,O-glycan

Loci

BBPR_1050–BBPR_1058

Species

Bifidobacterium bifidum/1681

Degradation or Biosynthesis

degradation

Cluster number

1

Gene name

Gene position

Gene type

Found by CGCFinder?

galE 1 - 1023 (-) CDS No
galT2 1069 - 2583 (-) CDS No
nahK 2583 - 3671 (-) CDS No
- 3961 - 5115 (+) CDS No
- 5258 - 6199 (-) CDS No
lnbP 6428 - 8683 (-) CAZyme: GH112 Yes
- 8935 - 9885 (-) TC: gnl|TC-DB|D6ZW62|3.A.1.1.48 Yes
- 9885 - 10856 (-) TC: gnl|TC-DB|D6ZW63|3.A.1.1.48 Yes
- 11033 - 12340 (-) TC: gnl|TC-DB|D6ZW64|3.A.1.1.48 Yes

PUL ID

PUL0576

PubMed

20974960, Proc Natl Acad Sci U S A. 2010 Nov 9;107(45):19514-9. doi: 10.1073/pnas.1011100107. Epub 2010 Oct 25.

Title

Genome analysis of Bifidobacterium bifidum PRL2010 reveals metabolic pathways for host-derived glycan foraging.

Author

Turroni F, Bottacini F, Foroni E, Mulder I, Kim JH, Zomer A, Sanchez B, Bidossi A, Ferrarini A, Giubellini V, Delledonne M, Henrissat B, Coutinho P, Oggioni M, Fitzgerald GF, Mills D, Margolles A, Kelly D, van Sinderen D, Ventura M

Abstract

The human intestine is densely populated by a microbial consortium whose metabolic activities are influenced by, among others, bifidobacteria. However, the genetic basis of adaptation of bifidobacteria to the human gut is poorly understood. Analysis of the 2,214,650-bp genome of Bifidobacterium bifidum PRL2010, a strain isolated from infant stool, revealed a nutrient-acquisition strategy that targets host-derived glycans, such as those present in mucin. Proteome and transcriptome profiling revealed a set of chromosomal loci responsible for mucin metabolism that appear to be under common transcriptional control and with predicted functions that allow degradation of various O-linked glycans in mucin. Conservation of the latter gene clusters in various B. bifidum strains supports the notion that host-derived glycan catabolism is an important colonization factor for B. bifidum with concomitant impact on intestinal microbiota ecology.