Project description:Young adult N2 Caenorhabditis elegans were infected with Enterococcus faecalis or Enterococcus faecium for 8 h to determine the transcriptional host response to each enterococcal species. Analysis of differential gene expression in C. elegans young adults exposed to four different bacteria: heat-killed Escherichia coli strain OP50 (control), wild-type E. faecalis MMH594, wild-type E. faecium E007, or Bacillus subtilis PY79 (sigF::kan). Samples were analyzed at 8 hours after exposure to the different bacteria. These studies identified C. elegans genes induced by pathogen infection. Brain-heart infusion agar plates (10 ug/ml kanamycin) were used.
Project description:We investigated the RNA-protein interactome of Enterococcus faecalis V583 and Enterococcus faecium Aus0004 by native gradient fractionation of complexes coupled to RNA-sequencing. Whole bacterial cell lysates were analysed by size and density in a glycerol gradient. At native conditions, RNA-protein complexes stay intact and sediment as a whole. Sedimentation profiles of individual RNAs appear correlated in case of interaction in a complex. The profile of KhpB caught our attention and we determined its RNA interactome by immunoprecipitation that suggests a role at the post-transcriptional level, binding notably several tRNAs, sRNAs, and 3’UTRs.
Project description:Mapping of transposon mutant library in Enterococcus faecium during growth in Brain Heart Infusion (BHI) broth and in a semi-static biofilm model. The goal of this study was to identify factors that play a role in E. faecium biofilm formation by selection of transposon insertion mutants that lost the capacity to form biofilm in vitro.
Project description:The transcriptome of Enterococcus faecium E1162 growing in Brain heart Infusion Broth was compared in the mid-exponential growth phase (A660 = 0.3) at 25 C and 37 C.