Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Bifid Shape Is Intrinsic to Bifidobacterium adolescentis.

ABSTRACT: Although the genus Bifidobacterium was originally named for its bifid morphology, not all bifidobacterial species have a similar structure, and very few of them adopt a bifid shape under stress conditions. The exposure of respective bifidobacterial species to various conditions, such as different pH, temperatures, medium components, in vivo growth in Caenorhabditis elegans, and subculture, did not affect their diverse morphologies. Extensive scanning electron microscopy studies suggested that the bifid shape of B. adolescentis are maintained irrespective of the conditions. Hence, we conclude that the bifid morphology is intrinsic to B. adolescentis. Most bifidobacterial species are anaerobic and rod-shaped, whereas, after the first generation, they become microaerophilic or aerophilic. CaCl₂ (treatment of B. animalis) signaling triggered a change from the rod shape to the bifid shape and vice versa in B. adolescentis.

SUBMITTER: Dhanashree

PROVIDER: S-EPMC5359755 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature

ACCESS DATA

Json Xml

Publications

Bifid Shape Is Intrinsic to Bifidobacterium adolescentis.

Dhanashree Rajashekharan Sharika S Krishnaswamy Balamurugan B Kammara Rajagopal R

Frontiers in microbiology 20170321

Although the genus Bifidobacterium was originally named for its bifid morphology, not all bifidobacterial species have a similar structure, and very few of them adopt a bifid shape under stress conditions. The exposure of respective bifidobacterial species to various conditions, such as different pH, temperatures, medium components, in vivo growth in Caenorhabditis elegans, and subculture, did not affect their diverse morphologies. Extensive scanning electron microscopy stud ...[more]

PMID: 28377762

Similar Datasets

Antiviral activity of Bifidobacterium adolescentis SPM1605 against Coxsackievirus B3.

Project description:Bifidobacteria are considered one of the most beneficial probiotics and have been widely studied for their effects against specific pathogens. The present study investigated the antiviral activity of probiotics isolated from Koreans against Coxsackievirus B3 (CVB3). The effect of probiotic isolates against CVB3 was measured by the plaque assay and cellular toxicity of bifidobacteria in HeLa cells was measured using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Among 13 probiotic isolates, 3 Bifidobacterium adolescentis, 2 Bifidobacterium longum and 1 Bifidobacterium pseudocatenulatum had an antiviral effect against CVB3, while the others did not show such effect. B. adolescentis SPM1605 showed the greatest inhibitory properties against CVB3. When the threshold cycle (CT) values for the treated B. adolescentis SPM1605 samples were compared to the results for the non-treated samples, it was shown that the amplified viral sequences from the CVB3 had their copy number lowered by B. adolescentis SPM1605. Moreover, the gene expression in infected HeLa cells was also inhibited by 50%. The results suggest that B. adolescentis SPM1605 suppresses CVB3 and could be used as an alternative therapy against infectious diseases caused by coxsackieviruses.

| S-EPMC4433936 | biostudies-other

Genomic diversity of Bifidobacterium adolescentis group

Project description:Bifidobacteria have been described as a key component of the human gut microbiota, and recently significant efforts have been made to investigate their genome contents and assess the genetic variability at inter- and intra-species level. In the current work we investigated genome diversity among representatives of bifidobacterial species, i.e., Bifidobacterium adolescentis. These analyses were performed with comparative genomic hybridization (CGH) experiments and they revealed the existence of a strictly conserved set of 685 gene families. Furthermore, CGH analyses showed that genetic regions of diversity included mobile elements and putative genomic life-style adaptation islands, such as loci that encode pili and capsular polysaccharides, and genes involved in carbohydrate metabolism. CGH analysis was performed with microarrays that were based on the genome sequences of B. adolescentis ATCC15703 (NC_008618) . A total of 39,249 probes of 35 bp in length were designed using OligoArray 2.1 software. Oligos were synthesized in triplicate on a 2 × 40-k CombiMatrix array (CombiMatrix, Mulkiteo, USA). Replicates were distributed on the chip at random, non-adjacent positions. A set of 74 negative control probes designed on phage and plant sequences was also included on the chip. Seventeen micrograms of purified genomic DNA was labeled with Cy5-ULS using the Kreatech ULS array CGH Labeling kit (Kreatech Diagnostics) according to the supplier’s instructions. Hybridization of labeled test DNA to these microarrays was performed according to CombiMatrix protocols.

2013-02-06 | GSE38992 | GEO

Bifidobacterium adolescentis supplementation attenuates fracture-induced systemic sequelae.

Project description:The gut microbiota is an important contributor to both health and disease. While previous studies have reported on the beneficial influences of the gut microbiota and probiotic supplementation on bone health, their role in recovery from skeletal injury and resultant systemic sequelae remains unexplored. This study aimed to determine the extent to which probiotics could modulate bone repair by dampening fracture-induced systemic inflammation. Our findings demonstrate that femur fracture induced an increase in gut permeability lasting up to 7 days after trauma before returning to basal levels. Strikingly, dietary supplementation with Bifidobacterium adolescentis augmented the tightening of the intestinal barrier, dampened the systemic inflammatory response to fracture, accelerated fracture callus cartilage remodeling, and elicited enhanced protection of the intact skeleton following fracture. Together, these data outline a mechanism whereby dietary supplementation with beneficial bacteria can be therapeutically targeted to prevent the systemic pathologies induced by femur fracture.

| S-EPMC9979243 | biostudies-literature

Bifidobacterium adolescentis is intrinsically resistant to antitubercular drugs.

Project description:Multiple mutations in the β subunit of the RNA polymerase (rpoβ) of Mycobacterium tuberculosis (Mtb) are the primary cause of resistance to rifamycin (RIF). In the present study, bifidobacterial rpoβ sequences were analyzed to characterize the mutations that contribute to the development of intrinsic resistance to RIF, isoniazid, streptomycin and pyrazinamide. Sequence variations, which mapped to cassettes 1 and 2 of the rpoβ pocket, are also found in multidrug-resistant Mtb (MDR Mtb). Growth curves in the presence of osmolytes and different concentrations of RIF showed that the bacteria adapted rapidly by shortening the growth curve lag time. Insight into the adapted rpoβ DNA sequences revealed that B. adolescentis harbored mutations both in the RIF pocket and in regions outside the pocket. The minimum inhibitory concentrations (MICs) and mutant prevention concentrations (MPCs) indicated that B. longum, B. adolescentis and B. animalis are resistant to antitubercular drugs. 3D-homology modeling and binding interaction studies using computational docking suggested that mutants had reduced binding affinity towards RIF. RIF-exposed/resistant bacteria exhibited variant protein profiles along with morphological differences, such as elongated and branched cells, surface conversion from rough to smooth, and formation of a concentrating ring.

| S-EPMC6085307 | biostudies-literature

Characterization of recombinant beta-fructofuranosidase from Bifidobacterium adolescentis G1.

Project description:BACKGROUND:We have previously reported on purification and characterization of beta-fructofuranosidase (beta-FFase) from Bifidobacterium adolescentis G1. This enzyme showed high activity of hydrolysis on fructo-oligosaccharides with a low degree of polymerization. Recently, genome sequences of B. longum NCC2705 and B. adolescentis ATCC 15703 were determined, and cscA gene in the both genome sequences encoding beta-FFase was predicted. Here, cloning of cscA gene encoding putative beta-FFase from B. adolescentis G1, its expression in E. coli and properties of the recombinant protein are described. RESULTS:Using the information of cscA gene from Bifidobacterium adolescentis ATCC 15703, cscA gene from B. adolescentis G1 was cloned and sequenced. The N-terminal amino acid sequence of purified beta-FFase from B. adolescentis G1 was identical to the deduced amino acid sequences of cscA gene from B. adolescentis G1. To confirm the translated product of the cscA gene, the recombinant protein was expressed in Escherichia coli. Molecular mass of the purified recombinant enzyme was estimated to be about 66,000 by SDS-PAGE and 60,300 by MALDI TOF-MS. The optimum pH of the enzyme was 5.7 and the enzyme was stable at pH 5.0-8.6. The thermostability of the enzyme was up to 50 degrees C. The K(m) (mM), Vmax (micromol/mg of protein/min), k0 (sec(-1)) and k0/K(m)(mM(-1) sec(-1)) for 1-kestose, neokestose, nystose, fructosylnystose, sucrose and inulin were 1.7, 107, 107.5, 63.2, and 1.7, 142, 142.7, 83.9, and 3.9, 152, 152.8, 39.2, and 2.2, 75, 75.4, 34.3, and 38, 79, 79.4, 2.1, and 25.9, 77, 77.4, 3.0, respectively. The hydrolytic activity was strongly inhibited by AgNO3, SDS, and HgCl2. CONCLUSION:The recombinant enzyme had similar specificity to the native enzyme, high affinity for 1-kestose, and low affinity for sucrose and inulin, although properties of the recombinant enzyme showed slight difference from those of the native one previously described.

| S-EPMC2873357 | biostudies-literature

Genomic diversity of Bifidobacterium adolescentis group

Project description:Bifidobacteria have been described as a key component of the human gut microbiota, and recently significant efforts have been made to investigate their genome contents and assess the genetic variability at inter- and intra-species level. In the current work we investigated genome diversity among representatives of bifidobacterial species, i.e., Bifidobacterium adolescentis. These analyses were performed with comparative genomic hybridization (CGH) experiments and they revealed the existence of a strictly conserved set of 685 gene families. Furthermore, CGH analyses showed that genetic regions of diversity included mobile elements and putative genomic life-style adaptation islands, such as loci that encode pili and capsular polysaccharides, and genes involved in carbohydrate metabolism. CGH analysis was performed with microarrays that were based on the genome sequences of B. adolescentis ATCC15703 (NC_008618) . A total of 39,249 probes of 35 bp in length were designed using OligoArray 2.1 software. Oligos were synthesized in triplicate on a 2 M-CM-^W 40-k CombiMatrix array (CombiMatrix, Mulkiteo, USA). Replicates were distributed on the chip at random, non-adjacent positions. A set of 74 negative control probes designed on phage and plant sequences was also included on the chip. Seventeen micrograms of purified genomic DNA was labeled with Cy5-ULS using the Kreatech ULS array CGH Labeling kit (Kreatech Diagnostics) according to the supplierM-bM-^@M-^Ys instructions. Hybridization of labeled test DNA to these microarrays was performed according to CombiMatrix protocols. We analysed seven strains belong to B. adolescentis species. Replicates were distributed on the chip at random, non-adjacent positions.

2013-02-06 | E-GEOD-38992 | biostudies-arrayexpress

Genomic diversity of Bifidobacterium adolescentis and pseudocatenulatum group

Project description:This SuperSeries is composed of the SubSeries listed below.

2013-02-06 | GSE39050 | GEO

Bifidobacterium adolescentis

Project description:Bifidobacterium adolescentis pangenome

| PRJNA300965 | ENA

Bifidobacterium adolescentis

Project description:Bifidobacterium adolescentis Genome sequencing and assembly

| PRJNA445212 | ENA

Bifidobacterium adolescentis

Project description:Bifidobacterium adolescentis Transcriptome or Gene expression