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Lüders S, Fallet C, Franco-Lara E. Proteome analysis of the Escherichia coli heat shock response under steady-state conditions. Proteome Sci. 2009;7:36doi: 10.1186/1477-5956-7-36.
Lüders, S., Fallet, C., & Franco-Lara, E. (2009). Proteome analysis of the Escherichia coli heat shock response under steady-state conditions. Proteome science, 736. https://doi.org/10.1186/1477-5956-7-36
Lüders, Svenja, et al. "Proteome analysis of the Escherichia coli heat shock response under steady-state conditions." Proteome science vol. 7 (2009): 36. doi: https://doi.org/10.1186/1477-5956-7-36
Lüders S, Fallet C, Franco-Lara E. Proteome analysis of the Escherichia coli heat shock response under steady-state conditions. Proteome Sci. 2009 Sep 21;7:36. doi: 10.1186/1477-5956-7-36. PMID: 19772559; PMCID: PMC2758844.
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Proteome Sci. 2009 Sep 21;7:36. doi: 10.1186/1477-5956-7-36.

Proteome analysis of the Escherichia coli heat shock response under steady-state conditions.

Proteome science

Svenja Lüders, Claas Fallet, Ezequiel Franco-Lara

Affiliations

  1. Institute of Biochemical Engineering, Technische Universität Braunschweig, Germany. [email protected]

PMID: 19772559 PMCID: PMC2758844 DOI: 10.1186/1477-5956-7-36

Abstract

In this study a proteomic approach was used to investigate the steady-state response of Escherichia coli to temperature up-shifts in a cascade of two continuously operated bioreactors. The first reactor served as cell source with optimal settings for microbial growth, while in the second chemostat the cells were exposed to elevated temperatures. By using this reactor configuration, which has not been reported to be used for the study of bacterial stress responses so far, it is possible to study temperature stress under well-defined, steady-state conditions. Specifically the effect on the cellular adaption to temperature stress using two-dimensional gel electrophoresis was examined and compared at the cultivation temperatures of 37 degrees C and 47.5 degrees C. As expected, the steady-state study with the double bioreactor configuration delivered a different protein spectrum compared to that obtained with standard batch experiments in shaking flasks and bioreactors. Setting a high cut-out spot-to-spot size ratio of 5, proteins involved in defence against oxygen stress, functional cell envelope proteins, chaperones and proteins involved in protein biosynthesis, the energy metabolism and the amino acid biosynthesis were found to be differently expressed at high cultivation temperatures. The results demonstrate the complexity of the stress response in a steady-state culture not reported elsewhere to date.

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