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: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 One array: Wild type E.coli SE15 vs. LuxS mutant E.coli SE15
Project description:Purpose:Next-generation sequencing (NGS) has revolutionized systems-based analysis of cellular pathways. The goals of this study are to compare NGS-derived E.coli transcriptome profiling (RNA-seq) of Wild type and ΔrecA with or without antibiotics treatment. Methods:libraries with different indices were multiplexed and loaded on an Illumina HiSeq instrument, Sequencing was carried out using a 2x150bp paired-end (PE) configuration, image analysis and base calling were conducted by the HiSeq Control Software (HCS) + OLB + GAPipeline-1.6 (Illumina) on the HiSeq instrument. Main data analysis include Quality Control(Cutadapt), Mapping(Bowtie2 (v2.2.6)),Expression analysis(HTSeq (v0.6.1p1)), Differential expression analysis (DESeq2 Bioconductor package). Results:Using an optimized data analysis workflow, we mapped about 20 million sequence reads per sample to the E.coli genome, The treatment of ampicillin affected the transcriptomic profile of either in the wild type or the ΔrecA strain, compared with that of untreated control cells, with changes to the expression of 4373 and 4286 coding sequences, respectively. Analysis of only the genes with a log2 fold change (log2FC) of ≥ ± 2 showed that 161 and 248 genes were differentially expressed in the ampicillin-treated wild type and ΔrecA strains, respectively. Conclusions:Our study represents the detailed analysis of E.coli transcriptomes, with biologic replicates, generated by RNA-seq technology. The optimized data analysis workflows reported here should provide a framework for comparative investigations of expression profiles. Our results show that NGS offers a comprehensive and more accurate quantitative and qualitative evaluation of mRNA content within a cell or tissue. We conclude that RNA-seq based transcriptome characterization would expedite genetic network analyses and permit the dissection of complex biologic functions.
