Abstract
"Roseburia inulinivorans" is an anaerobic polysaccharide-utilizing firmicute bacterium from the human colon that was identified as a producer of butyric acid during growth on glucose, starch, or inulin. R. inulinivorans A2-194 is also able to grow on the host-derived sugar fucose, following a lag period, producing propionate and propanol as additional fermentation products. A shotgun genomic microarray was constructed and used to investigate the switch in gene expression that is involved in changing from glucose to fucose utilization. This revealed a set of genes coding for fucose utilization, propanediol utilization, and the formation of propionate and propanol that are up-regulated during growth on fucose. These include homologues of genes that are implicated in polyhedral body formation in Salmonella enterica. Dehydration of the intermediate 1,2-propanediol involves an enzyme belonging to the new B-12-independent glycerol dehydratase family, in contrast to S. enterica, which relies on a B-12-dependent enzyme. A typical gram-positive agr-type quorum-sensing system was also up-regulated in R. inulinivorans during growth on fucose. Despite the lack of genome sequence information for this commensal bacterium, microarray analysis has provided a powerful tool for obtaining new information on its metabolic capabilities.
Original language | English |
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Pages (from-to) | 4340-4349 |
Number of pages | 10 |
Journal | Journal of Bacteriology |
Volume | 188 |
Issue number | 12 |
DOIs | |
Publication status | Published - Jun 2006 |
Keywords
- Butyrate-producing bacteria
- 16s ribosomal RNA
- Serovar typhimurium LT2
- human colonic bacteria
- Staphylococcus aureus
- human feces
- Oligonucleotide probes
- Salmonella typhimurium
- clostridium butyricum
- Escherichia coli