title: Global change of gene expression and cell physiology in YidC-depleted Escherichia coli.
abstract: YidC depletion affects membrane protein insertion and leads to a defect in the growth of the Escherichia coli cell. We analyzed global changes in gene expression upon YidC depletion to determine the importance of YidC for cellular functions using a gene chip method to compare the transcriptomes of JS71 (control) and JS7131 (yidC depletion strain). Of the more than 4,300 genes identified, 163 were upregulated and 99 were downregulated upon YidC depletion, including genes which are responsible for DNA/RNA repair; energy metabolism; various transporters, proteases and chaperones; stress response; and translation and transcription functions. Real-time PCR was performed on selected genes to confirm the results. Specifically, we found upregulation of the genes encoding the energy transduction proteins F(1)F(o) ATP synthase and cytochrome bo(3) oxidase due to perturbation in assembly when YidC was depleted. We also determined that the high-level induction of the PspA stress protein under YidC depletion conditions is roughly 10-fold higher than the activation due to the addition of protonophore carbonyl cyanide m-chlorophenylhydrazone (CCCP), which dissipates the proton motive force. In addition, the gene chip data reveal the Cpx stress pathway is activated upon YidC depletion. The data show the broad physiological contribution of YidC to the bacterial cell and the considerable ramification to the cell when it is depleted.
authors.affiliation: The Ohio State University, Department of Chemistry, 100 West 18th Avenue, Columbus, OH 43210, USA.
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Andreas
authors.initials: A
authors.lastname: Kuhn
authors.forename: Ross E
authors.initials: RE
authors.lastname: Dalbey
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D015153:Blotting, Western; D002258:Carbonyl Cyanide m-Chlorophenyl Hydrazone / Q000494:pharmacology; D015180:Electrophoresis, Gel, Two-Dimensional; D004926:Escherichia coli / Q000187:drug effects / Q000235:genetics / Q000378:metabolism* / Q000502:physiology; D029968:Escherichia coli Proteins / Q000235:genetics / Q000378:metabolism*; D015964:Gene Expression Regulation, Bacterial / Q000187:drug effects; D006360:Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism; D007476:Ionophores / Q000494:pharmacology; D026901:Membrane Transport Proteins / Q000235:genetics / Q000378:metabolism*; D016133:Polymerase Chain Reaction; D053719:Tandem Mass Spectrometry
chemical_list: D001426:Bacterial Proteins; D029968:Escherichia coli Proteins; D006360:Heat-Shock Proteins; D007476:Ionophores; D026901:Membrane Transport Proteins; C412443:YIDC protein, E coli; C069816:phage shock protein, Bacteria; D002258:Carbonyl Cyanide m-Chlorophenyl Hydrazone