| Literature DB >> 19033196 |
D A Sela1, J Chapman, A Adeuya, J H Kim, F Chen, T R Whitehead, A Lapidus, D S Rokhsar, C B Lebrilla, J B German, N P Price, P M Richardson, D A Mills.
Abstract
Following birth, the breast-fed infant gastrointestinal tract is rapidly colonized by a microbial consortium often dominated by bifidobacteria. Accordingly, the complete genome sequence of Bifidobacterium longum subsp. infantis ATCC15697 reflects a competitive nutrient-utilization strategy targeting milk-borne molecules which lack a nutritive value to the neonate. Several chromosomal loci reflect potential adaptation to the infant host including a 43 kbp cluster encoding catabolic genes, extracellular solute binding proteins and permeases predicted to be active on milk oligosaccharides. An examination of in vivo metabolism has detected the hallmarks of milk oligosaccharide utilization via the central fermentative pathway using metabolomic and proteomic approaches. Finally, conservation of gene clusters in multiple isolates corroborates the genomic mechanism underlying milk utilization for this infant-associated phylotype.Entities:
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Year: 2008 PMID： 19033196 PMCID： PMC2596198 DOI： 10.1073/pnas.0809584105
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205