title: Transcriptomic profiling of Yersinia pseudotuberculosis reveals reprogramming of the Crp regulon by temperature and uncovers Crp as a master regulator of small RNAs.
abstract: One hallmark of pathogenic yersiniae is their ability to rapidly adjust their life-style and pathogenesis upon host entry. In order to capture the range, magnitude and complexity of the underlying gene control mechanisms we used comparative RNA-seq-based transcriptomic profiling of the enteric pathogen Y. pseudotuberculosis under environmental and infection-relevant conditions. We identified 1151 individual transcription start sites, multiple riboswitch-like RNA elements, and a global set of antisense RNAs and previously unrecognized trans-acting RNAs. Taking advantage of these data, we revealed a temperature-induced and growth phase-dependent reprogramming of a large set of catabolic/energy production genes and uncovered the existence of a thermo-regulated 'acetate switch', which appear to prime the bacteria for growth in the digestive tract. To elucidate the regulatory architecture linking nutritional status to virulence we also refined the CRP regulon. We identified a massive remodelling of the CRP-controlled network in response to temperature and discovered CRP as a transcriptional master regulator of numerous conserved and newly identified non-coding RNAs which participate in this process. This finding highlights a novel level of complexity of the regulatory network in which the concerted action of transcriptional regulators and multiple non-coding RNAs under control of CRP adjusts the control of Yersinia fitness and virulence to the requirements of their environmental and virulent life-styles.
authors: Department of Molecular Infection Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors: Aaron M
authors: AM
authors: Nuss
authors: Department of Molecular Infection Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors: Ann Kathrin
authors: AK
authors: Heroven
authors: Department of Molecular Infection Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors: Barbara
authors: B
authors: Waldmann
authors: Faculty of Technology and Center for Biotechnology (CeBiTec), Bielefeld University, Germany.
authors: Jan
authors: J
authors: Reinkensmeier
authors: Department of Genome Analytics, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors: Michael
authors: M
authors: Jarek
authors: Department of Molecular Infection Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors: Michael
authors: M
authors: Beckstette
authors: Department of Molecular Infection Biology, Helmholtz Centre for Infection Research, Braunschweig, Germany.
authors: Petra
authors: P
authors: Dersch
mesh_terms: D000242:Cyclic AMP / Q000235:genetics / Q000378:metabolism; D002373:Cyclic AMP Receptor Protein / Q000235:genetics*; D005656:Fungal Proteins / Q000235:genetics*; D020869:Gene Expression Profiling; D015966:Gene Expression Regulation, Fungal; D059647:Gene-Environment Interaction; D016372:RNA, Antisense / Q000235:genetics / Q000302:isolation & purification; D018085:Regulon / Q000235:genetics*; D058928:Riboswitch / Q000235:genetics; D013696:Temperature; D024363:Transcription Initiation Site; D015011:Yersinia pseudotuberculosis / Q000235:genetics* / Q000254:growth & development / Q000472:pathogenicity
chemical_list: D002373:Cyclic AMP Receptor Protein; D005656:Fungal Proteins; D016372:RNA, Antisense; D058928:Riboswitch; D000242:Cyclic AMP