Project description:NsrR is a nitric oxide sensitive regulator of transcription. In Escherichia coli, NsrR is a repressor of the hmp gene encoding the flavohemoglobin that detoxifies nitric oxide. Several other transcription units (including ytfE, ygbA and hcp-hcr) are known to be subject to regulation by NsrR. In this study, chromatin immunoprecipitation and microarray analysis was used to identify NsrR binding sites in the chromosome of Escherichia coli strain MG1655. Keywords: ChIP-chip
Project description:Investigation of whole genome gene expression level changes in a Escherichia coli MG1655 K-12 nsrR with AUG start codon compared to the wild type nsrR (with a GUG start codon) and to the control lacking the nsrR gene. Conversion of the nsrR start codon from the wild type GUG to AUG increased the efficiency of translation and had measurable effects on the expression patterns of some NsrR regulated genes. A nine chip study using total RNA recovered from three separate cultures of Escherichia coli MG1655 K-12 AUGnsrR, three separate cultures of the WT nsrR (GUGnsrR) and three separate cultures of nsrR deletion strain. Each chip measures the expression level of 4,254 genes from Escherichia coli MG1655 K-12 with eight 60-mer probes per gene, with 2-fold technical redundancy.
Project description:Investigation of whole genome gene expression level changes in a Escherichia coli MG1655 K-12 nsrR with AUG start codon compared to the wild type nsrR (with a GUG start codon) and to the control lacking the nsrR gene. Conversion of the nsrR start codon from the wild type GUG to AUG increased the efficiency of translation and had measurable effects on the expression patterns of some NsrR regulated genes.
Project description:The purpose of this study is to determine whether the presence of pathogenic Escherichia coli in colon is associated with psychiatric disorders.
Project description:To investigate the regulatory targets of the RegR virulence regulon of rabbit specific enteropathogenic Escherichia coli strain E22
Project description:Successful pathogens must be able to protect themselves against reactive nitrogen species generated either as part of host defence mechanisms, or as products of their own metabolism. The regulatory protein, NsrR (a member of the Rrf2 family of transcription factors), plays key roles in this stress response. Microarray analysis was carried out to reveal the regulon of NsrR. Keywords: Response to repressor titration and different growth conditions
Project description:Escherichia coli (E. coli) amine oxidase (ECAO) encoded by tynA gene has been one of the model enzymes to study the mechanism of oxidative deamination of amines to the corresponding aldehydes by amine oxidases. The biological roles of ECAO have been less addressed. Therefore we have constructed a gene deletion Escherichia coli K-12 strain, E. coli tynA-, and used the microarray technique to address its function by comparing the total RNA gene expression to the one of the wt. Our results suggest that tynA is a reserve gene for stringent environmental conditions and its gene product ECAO a growth advantage compared to other bacteria due to H2O2 production.
Project description:Despite the characterization of many aetiologic genetic changes. The specific causative factors in the development of sporadic colorectal cancer remain unclear. This study was performed to detect the possible role of Enteropathogenic Escherichia coli (EPEC) in developing colorectal carcinoma.
