Christin Weinberg

Publications (2)8.84 Total impact

• Article: The Spx paralogue MgsR (YqgZ) controls a subregulon within the general stress response of Bacillus subtilis.

  Alexander Reder, Dirk Höper, Christin Weinberg, Ulf Gerth, Martin Fraunholz, Michael Hecker
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  ABSTRACT: The alternative sigma factor sigma(B) of Bacillus subtilis is responsible for the induction of the large general stress regulon comprising approximately 150-200 genes. YqgZ, a member of the sigma(B) regulon, resembles the global regulator Spx of the diamide stress regulon in B. subtilis. In this work we conducted a comprehensive transcriptome and proteome analysis of the B. subtilis wild-type 168 and its isogenic DeltasigB and DeltayqgZ mutants following exposure to 4% (v/v) ethanol stress, which led to the characterization of a 'subregulon' within the general stress response that is regulated by YqgZ. Activation and induction of sigma(B) are necessary but not sufficient for a full expression of all general stress genes. Expression of 53 genes was found to be positively regulated and the expression of 18 genes was negatively affected by YqgZ. The identification of the negatively regulated group represents a so far uncharacterized regulatory phenomenon observed in the DeltasigB mutant background that can now be attributed to the function of YqgZ. Due to the strict sigma(B)-dependent expression of YqgZ it was renamed to MgsR (modulator of the general stress response).
  Molecular Microbiology 09/2008; 69(5):1104-20. · 5.01 Impact Factor
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  Available from: ncbi.nlm.nih.gov

  Article: Influence of the two-component system SaeRS on global gene expression in two different Staphylococcus aureus strains.

  Kathrin Rogasch, Vanessa Rühmling, Jan Pané-Farré, Dirk Höper, Christin Weinberg, Stephan Fuchs, Mareike Schmudde, Barbara M Bröker, Christiane Wolz, Michael Hecker, Susanne Engelmann
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  ABSTRACT: The two-component system SaeRS consisting of the histidin kinase SaeS and the response regulator SaeR is known to act on virulence gene expression in Staphylococcus aureus. In order to get a more comprehensive picture on SaeR-regulated genes, we studied the contribution of the two-component system on global gene expression by using both the proteomic and transcriptomic approach. Altogether, a loss of SaeRS resulted in a decreased amount of at least 17 extracellular proteins and two cell surface-associated proteins, among them several important virulence factors such as HlgA, HlgB, HlgC, LukF, and LukM. SaeRS activates the expression of these genes at the transcriptional level. The amount of the five proteins Aur, SspA, SsaA, Plc, and GlpQ was negatively influenced by SaeRS. However, the transcription of the corresponding genes was not affected by the two-component system. SaeRS had also no measurable influence on the transcription of the regulatory genes agr, sarA, arlRS, and sigB that contribute to the regulation of SaeRS-dependent virulence factors identified in this investigation. Our results clearly show that SaeRS is strongly involved in the tight temporal control of virulence factor expression in S. aureus. Its precise role within the regulatory network remains to be determined.
  Journal of Bacteriology 12/2006; 188(22):7742-58. · 3.83 Impact Factor