Project description:The goal of the study is to obtain rna concentrations of E.coli under different growth conditions including growth phase carbon source and salt stresses of Mg+2 and Na+
Project description:Transcriptional profiling of E.coli SE15 comparing wild type E.coli SE15 with Autoindecur 2 synthesis gene LuxS mutnat E.coli SE15. E.coli SE15 is isolated from indwelling catheter of urinary tract infected patient. Examine change of quorum sensing related gene by deleting autoinducer 2 synthesis gene LuxS in E.coli
Project description:Most research involved in studying the response of gene expression to cAMP have done so under binary states, that is, presence and absence of cAMP in the cell. However, cAMP concentrations in the cell have been reported to vary in a continuous fashion. Systematic studies of global transcription response to continuous changes in intracellular cAMP are largely missing. Here, we study the gene expression kinetics of the E.coli transcriptome in response to an increasing exposure to cAMP.
Project description:The goals of this study are to use Next-generation sequencing (NGS)to detect bacterial mRNA profiles of E.coli DH5a in response to 0, 20ug/L and 2 mg/L triclosan for 2 h, in triplicate, using Illumina HiSeq 2500.The NGS QC toolkit (version 2.3.3) was used to treat the raw sequence reads to trim the 3’-end residual adaptors and primers, and the ambiguous characters in the reads were removed. Then, the sequence reads consisting of at least 85% bases were progressively trimmed at the 3’-ends until a quality value ≥ 20 were kept. Downstream analyses were performed using the generated clean reads of no shorter than 75 bp. The clean reads of each sample were aligned to the E. coli reference genome (NC_000913) using SeqAlto (version 0.5). Cufflinks (version 2.2.1) was used to calculate the strand-specific coverage for each gene, and to analyze the differential expression in triplicate bacterial cell cultures. The statistical analyses and visualization were conducted using CummeRbund package in R (http://compbio.mit.edu/cummeRbund/). Gene expression was calculated as fragments per kilobase of a gene per million mapped reads (FPKM, a normalized value generated from the frequency of detection and the length of a given gene.
Project description:Investigation of comprehensive information about the expression level of RNA transcripts across the entire E.coli genome in mulitple growth conditions, including log-phase; stationary phase, heat shock and nitrogen-limiting condition.
Project description:Investigation of comprehensive information about the expression level of RNA transcripts across the entire E.coli genome in mulitple growth conditions, including log-phase; stationary phase, heat shock and nitrogen-limiting condition. A fourteen chip study using total RNA recovered from four separate culture conditions of E.coli K12 MG1655. E.coli strains were harvested at mid-exponential phase with exception of stationary phase experiments. The high-density oligonucleotide tiling arrays used were consisted of 371,034 oligonucleotide probes spaced 25 bp apart (25-bp overlap between two probes) across the E. coli genome (NimbleGen). Experiments were conducted as three or more biological replicates (different cultures)
Project description:The goals of this study are to use SWATH-MS to detect bacterial proteomic profiles of E. coli K-12 LE392 with conjugative RP4 plasmid, P. putida KT2440, and their protein response under the exposure of six kinds of non-antibiotic pharmaceuticals, i.e., ibuprofen (ibu), naproxen (nap), gemfibrozil (gem), iopromide (iop), diclofenac (dic), propanolol (pro). Each treatment condition was conducted in triplicate. By comparing the proteomic profiles of experimental groups and control group, the effects of these non-antibiotic pharmaceuticals on translational levels can be revealed.