Ontology highlight
ABSTRACT:
PROVIDER: PRJNA818876 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR18475217_1.fastq.gz | Fastqsanger.gz | |||
| SRR18475217_2.fastq.gz | Fastqsanger.gz | |||
| SRR18475218_1.fastq.gz | Fastqsanger.gz | |||
| SRR18475218_2.fastq.gz | Fastqsanger.gz | |||
| SRR18475219_1.fastq.gz | Fastqsanger.gz |
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Project description:This is the reduced model described in the article:
A synthetic Escherichia coli predator–prey ecosystem
Balagaddé FK, Song H, Ozaki J, Collins CH, Barnet M, Arnold FH, Quake SR, You L.Mol Syst Biol. 2008;4:187. Epub 2008 Apr 15. PMID: 18414488; DOI:10.1038/msb.2008.24
Abstract:
We have constructed a synthetic ecosystem consisting of two Escherichia coli populations, which communicate bi-directionally through quorum sensing and regulate each other's gene expression and survival via engineered gene circuits. Our synthetic ecosystem resembles canonical predator–prey systems in terms of logic and dynamics. The predator cells kill the prey by inducing expression of a killer protein in the prey, while the prey rescue the predators by eliciting expression of an antidote protein in the predator. Extinction, coexistence and oscillatory dynamics of the predator and prey populations are possible depending on the operating conditions as experimentally validated by long-term culturing of the system in microchemostats. A simple mathematical model is developed to capture these system dynamics. Coherent interplay between experiments and mathematical analysis enables exploration of the dynamics of interacting populations in a predictable manner.
In the article the cell density is given in per 103 cells per microlitre. To evade a conversion factor in the SBML implementation, the unit for the cell densities was just left the same as for the AHLs A and A2 (nM).
This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2012 The BioModels.net Team.
For more information see the terms of use.
To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Novère N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92.
2024-09-02 | BIOMD0000000296 | BioModels
Project description:Bdellovibrio bacteriovorus is a Gram-negative bacterium that is a pathogen of other Gram-negative bacteria, including many bacteria which are pathogens of humans, animals and plants. As such Bdellovibrio has potential as a biocontrol agent, or living antibiotic. B. bacteriovorus HD100 has a large genome and it is not yet known which of it encodes the molecular machinery and genetic control of predatory processes. We have tried to fill this knowledge-gap using mixtures of predator and prey mRNAs to monitor changes in Bdellovibrio gene expression at a timepoint of early-stage prey infection and prey killing in comparison to control cultures of predator and prey alone and also in comparison to Bdellovibrio growing axenically (in a prey-or host independent “HI” manner) on artificial media containing peptone and tryptone. From this we have highlighted genes of the early predatosome with predicted roles in prey killing and digestion and have gained insights into possible regulatory mechanisms as Bdellovibrio enter and establish within the prey bdelloplast. Approximately seven percent of all Bdellovibrio genes were significantly up-regulated at 30 minutes of infection- but not in HI growth- implicating the role of these genes in prey digestion. Five percent were down-regulated significantly, implicating their role in free-swimming, attack-phase physiology. This study gives the first post- genomic insight into the predatory process and reveals some of the important genes that Bdellovibrio expresses inside the prey bacterium during the initial attack. Keywords: Transcriptional analysis
2009-12-09 | GSE9269 | GEO
Project description:Bdellovibrio bacteriovorus is a Gram-negative bacterium that is a pathogen of other Gram-negative bacteria, including many bacteria which are pathogens of humans, animals and plants. As such Bdellovibrio has potential as a biocontrol agent, or living antibiotic. B. bacteriovorus HD100 has a large genome and it is not yet known which of it encodes the molecular machinery and genetic control of predatory processes. We have tried to fill this knowledge-gap using mixtures of predator and prey mRNAs to monitor changes in Bdellovibrio gene expression at a timepoint of early-stage prey infection and prey killing in comparison to control cultures of predator and prey alone and also in comparison to Bdellovibrio growing axenically (in a prey-or host independent âHIâ manner) on artificial media containing peptone and tryptone. From this we have highlighted genes of the early predatosome with predicted roles in prey killing and digestion and have gained insights into possible regulatory mechanisms as Bdellovibrio enter and establish within the prey bdelloplast. Approximately seven percent of all Bdellovibrio genes were significantly up-regulated at 30 minutes of infection- but not in HI growth- implicating the role of these genes in prey digestion. Five percent were down-regulated significantly, implicating their role in free-swimming, attack-phase physiology. This study gives the first post- genomic insight into the predatory process and reveals some of the important genes that Bdellovibrio expresses inside the prey bacterium during the initial attack. Keywords: Transcriptional analysis 3 replicates of attack phase cells and 3 replicates of 30 minutes post-infection cells were analysed on individual arrays. Replicate 3 was normalized separately.
2010-05-18 | E-GEOD-9269 | biostudies-arrayexpress
Project description:Bdellovibrio bacteriovorus HD100 is a predatory bacterium which attacks a wide range of gram negative bacterial pathogens and is proposed to be a potential living antibiotic. In the current study, we evaluated the effects of indole, a bacterial signaling molecule commonly produced within the gut, on the predatory ability of B. bacteriovorus HD100. Indole significantly delayed predation on E. coli MG1655 and S. enterica KACC 11595 at physiological concentrations (0.25 to 1 mM) and completely inhibited predation when present at 2 mM. Microscopic analysis revealed that indole blocked the predator from attacking the prey. Furthermore, indole was not toxic to the predator but slowed down its motility. Microarray and RT-qPCR analyses confirmed this as the gene group showing the greatest down-regulation in the presence of 1 and 2 mM indole was flagellar assembly and motility genes. Aside from this group, indole also caused a wide spectrum changes in gene expression including the general down-regulation of genes involved in ribosome assembly and RNA translation. Furthermore, indole addition to the predatory culture after the entrance of B. bacteriovorus into the prey periplasm slowed down bdelloplast lysis. In conclusion, indole is an important gut-related signaling molecule that can have significant impacts on the predation efficiency and predator behavior. These findings should be taken into consideration especially if B. bacteriovorus is to be applied as a probiotic or living antibiotic.
2013-11-19 | GSE52455 | GEO
Project description:Prey-predator interaction between protists and bacteria is interfered by biochar
| PRJNA622382 | ENA
Project description:Bdellovibrio bacteriovorus HD100 is a predatory bacterium which attacks a wide range of gram negative bacterial pathogens and is proposed to be a potential living antibiotic. In the current study, we evaluated the effects of indole, a bacterial signaling molecule commonly produced within the gut, on the predatory ability of B. bacteriovorus HD100. Indole significantly delayed predation on E. coli MG1655 and S. enterica KACC 11595 at physiological concentrations (0.25 to 1 mM) and completely inhibited predation when present at 2 mM. Microscopic analysis revealed that indole blocked the predator from attacking the prey. Furthermore, indole was not toxic to the predator but slowed down its motility. Microarray and RT-qPCR analyses confirmed this as the gene group showing the greatest down-regulation in the presence of 1 and 2 mM indole was flagellar assembly and motility genes. Aside from this group, indole also caused a wide spectrum changes in gene expression including the general down-regulation of genes involved in ribosome assembly and RNA translation. Furthermore, indole addition to the predatory culture after the entrance of B. bacteriovorus into the prey periplasm slowed down bdelloplast lysis. In conclusion, indole is an important gut-related signaling molecule that can have significant impacts on the predation efficiency and predator behavior. These findings should be taken into consideration especially if B. bacteriovorus is to be applied as a probiotic or living antibiotic. Bdellovibrio bacteriovorus HD100 was incubated for 30 min at 30°C in HEPES buffer supplemented with 0,1, and 2 mM indole. RNA was then extracted from each sample and purified. 100 ng of RNA from each sample were used for microarray experiment. For zero and 1 mM indole treatments, three independant samples were tested while for 2 mM indole treatment, two samples were tested. A total of 8 arrays were used.
2013-11-19 | E-GEOD-52455 | biostudies-arrayexpress