Cellodextrin utilization by Bifidobacterium breve UCC2003
Ontology highlight
ABSTRACT:
ORGANISM(S): Bifidobacterium breve UCC2003
PROVIDER: GSE17604 | GEO | 2010/08/11
SECONDARY ACCESSION(S): PRJNA118557
REPOSITORIES: GEO
Similar Datasets
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. In order to investigate differences in gene expression patterns of B. breve UCC2003 when grown on cellobiose or cellodextrins as compared to growth on glucose, DNA microarray experiments were performed. Total RNA was isolated from B. breve UCC2003 cultures grown on cellobiose, cellodextrins, or glucose (see Materials and Methods). The cultures were harvested at the time points that ensured that B. breve UCC2003 was metabolizing cellobiose or cellodextrins as opposed to the residual glucose present in the cellodextrin preparation. Analysis of the DNA microarray data was obtained from two independent biological replicates.
2010-08-11 | E-GEOD-17604 | biostudies-arrayexpress
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.
2014-12-17 | GSE59013 | GEO
Project description:Development of the human gut microbiota commences at birth with bifidobacteria being among the first colonizers of the sterile newborn gastrointestinal tract. To date the genetic basis of bifidobacterial colonization and persistence remains poorly understood. Transcriptomic analysis of the 2,422,684 bp genome of Bifidobacterium breve UCC2003, a strain isolated from a nursling stool, during colonization of a mouse model revealed the differential expression of a type IVb or so-called Tad pilus-encoding cluster. Mutational analysis coupled with colonization experiments demonstrated that the UCC2003 tad gene cluster is essential for colonization. Immunogold transmission electron microscopy confirmed the presence of the Tad pili at the cell poles of B. breve UCC2003. Conservation of the Tad pilus-encoding locus among sequenced bifidobacterial genomes supports the notion of a ubiquitous and novel host colonization and persistence mechanism for bifidobacteria.
2011-07-01 | GSE27491 | GEO
Project description:Cellodextrin utilization by Bifidobacterium breve UCC2003
| PRJNA118557 | ENA
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. DNA-microarrays containing oligonucleotide primers representing each of the 1864 annotated genes on the genome of B. breve UCC2003 (O'Connell Motherway et al., 2011) were designed by and obtained from Agilent Technologies (Palo Alto, Ca., USA). Methods for cell disruption, RNA isolation, RNA quality control, complementary DNA synthesis and labeling were performed as described previously (Pokusaeva et al., 2009). Labeled cDNA was hybridized using the Agilent Gene Expression hybridization kit (part number 5188-5242) as described in the Agilent Two-Color Microarray-Based Gene Expression Analysis v4.0 manual (G4140-90050). Following hybridization, microarrays were washed in accordance with Agilent’s standard procedures and scanned using an Agilent DNA microarray scanner (model G2565A). Generated scans were converted to data files with Agilent's Feature Extraction software (Version 9.5). DNA-microarray data were processed as previously described (Garcia De La Nava et al., 2003). Differential expression tests were performed with the Cyber-T implementation of a variant of the t-test (Long et al., 2001). A gene was considered differentially expressed when p < 0.001 and an expression ratio of >3 or <0.33 relative to the control.
2014-12-17 | E-GEOD-59013 | biostudies-arrayexpress
Project description:Bbr_0838 from Bifidobacterium breve UCC2003 encodes a 683 residue membrane protein, that contains a permease domain displaying similarity to transporters belonging to the major facilitator superfamily, as well as a CBS (cystathionine beta synthase) domain. The high level of similarity to bile-efflux pumps from other bifidobacteria, suggests a significant role for Bbr_0838 in bile tolerance of B. breve UCC2003. Bbr_0838 transcription was shown to be monocistronic and strongly induced upon exposure to bile. Further analysis delineated the transcriptional start site and the minimal region required for promoter activity and bile regulation. Insertional inactivation of Bbr_0838 in B. breve UCC2003 resulted in a strain that exhibited reduced survival upon cholate exposure as compared to the parent strain, a phenotype that was reversed when a functional Bbr_0838 gene was introduced into UCC2003::838800. Transcriptome analysis of UCC2003::838800 grown in the presence or absence of bile demonstrated that transcription of Bbr_0832, which is predicted to encode a macrolide-efflux transporter gene, was significantly increased in the presence of bile, representing a likely compensatory mechanism for bile removal in the absence of Bbr_0838. This study represents the first in depth analysis of a bile-inducible locus in bifidobacteria, identifying a key gene relevant for bifidobacterial bile tolerance. In order to investigate differences in global gene expression upon growth or exposure of B. breve UCC2003-delta0838 to cholic acid compared to normal growing cells, DNA microarray experiments were performed. Total RNA was isolated from B. breve UCC2003-delta0838 cultures under normal conditions and cultures grown on or exposed to cholic acid. All experiments were performed in duplo and targets where confirmed with QRT-PCR. In addition transcriptome analyse was performed of B. breve UCC2003 compared to that of B. breve UCC2003-delta0838 both exposed to 0.1 % cholic acid. This was performed as a single experiment and targets were confirmed by QRT-PCR
2012-02-20 | E-GEOD-31224 | biostudies-arrayexpress
Project description:Growth of B. breve UCC2003 on ribose leads to the transcriptional induction of the rbsACBDK gene cluster. Generation and phenotypic analysis of an rbsA insertion mutant established that the rbs gene cluster is essential for ribose utilization, and that its transcription is likely regulated by a LacI-type regulator encoded by rbsR, located immediately upstream of rbsA. Gel mobility shift assays using purified RbsRHis indicate that the promoter upstream of rbsABCDK is negatively controlled by RbsRHis binding to an 18-bp inverted repeat and that RbsRHis binding activity is modulated by D-ribose. The rbsK gene of the rbs operon of B. breve UCC2003 was shown to specify a ribokinase (EC 2.7.1.15), which specifically directs its phosphorylating activity towards D-ribose, converting this pentose sugar to ribose-5-phosphate. In order to investigate differences in global gene expression upon growth of B. breve UCC2003 on ribose, or a combination of ribose and glucose, as compared to glucose, DNA microarray experiments were performed. Total RNA was isolated from B. breve UCC2003 cultures grown on ribose, a combination of ribose and glucose, or glucose. All experiments were performed in duplicate. A dye swap was performed in one of the two biological replicates.
2010-05-19 | E-GEOD-17325 | biostudies-arrayexpress
Project description:This work aimed to investigate the ability of two human-derived bifidobacterial strains, i.e. Bifidobacterium breve UCC2003 and Bifidobacterium longum NCIMB 8809, to utilize various oligosaccharides (i.e., 4-galactosyl-kojibiose, lactulosucrose, lactosyl-oligofructosides, raffinosyl-oligofructosides and lactulose-derived galacto-oligosaccharides) synthesized by means of microbial glycoside hydrolases. With the exception of raffinosyl-oligofructosides, these biosynthetic oligosaccharides were shown to support growth of at least one of the two studied strains. Short-chain fatty acid (SCFA) analysis by HPLC corroborated the suitability of most of the studied novel oligosaccharides as growth substrates for the two bifidobacterial strains, showing that acetate is the main metabolic end product followed by lactic and formic acids. Transcriptomic and functional genomic approaches carried out for B. breve UCC2003 allowed the identification of key genes encoding glycoside hydrolases and protein transport systems involved in the metabolism of 4-galactosyl-kojibiose and lactulosucrose. In particular, the role of β-galactosidases in the hydrolysis of these particular trisaccharides was demonstrated, highlighting their importance in oligosaccharide metabolism by human bifidobacterial strains.
2019-06-18 | GSE132879 | GEO
Project description:To extend our understanding of bifidobacterial mutualism and carbohydrate syntrophy in the gut we adopted advanced functional genomics to create single- and double-deletion isogenic strains of the NagA encoding genes of B. breve UCC2003. The resulting strains were examined, as compared to the parent strain, for their ability to metabolise particular host derived carbohydrates. In addition, the B. breve strains were examined for their crossfeeding capability and ability to establish, in the presence of B. bifidum ATCC29521, in the gut of dam fed neonatal mice.
2018-07-19 | GSE110077 | GEO
Project description:Bbr_0838 from Bifidobacterium breve UCC2003 encodes a 683 residue membrane protein, that contains a permease domain displaying similarity to transporters belonging to the major facilitator superfamily, as well as a CBS (cystathionine beta synthase) domain. The high level of similarity to bile-efflux pumps from other bifidobacteria, suggests a significant role for Bbr_0838 in bile tolerance of B. breve UCC2003. Bbr_0838 transcription was shown to be monocistronic and strongly induced upon exposure to bile. Further analysis delineated the transcriptional start site and the minimal region required for promoter activity and bile regulation. Insertional inactivation of Bbr_0838 in B. breve UCC2003 resulted in a strain that exhibited reduced survival upon cholate exposure as compared to the parent strain, a phenotype that was reversed when a functional Bbr_0838 gene was introduced into UCC2003::838800. Transcriptome analysis of UCC2003::838800 grown in the presence or absence of bile demonstrated that transcription of Bbr_0832, which is predicted to encode a macrolide-efflux transporter gene, was significantly increased in the presence of bile, representing a likely compensatory mechanism for bile removal in the absence of Bbr_0838. This study represents the first in depth analysis of a bile-inducible locus in bifidobacteria, identifying a key gene relevant for bifidobacterial bile tolerance.
2012-02-20 | GSE31224 | GEO