Analysis of Escherichia coli global gene expression profiles in response to overexpression and deletion of CspC and CspE

Sangita Phadtare, Vasisht Tadigotla, Weon Hye Shin, Anirvan Sengupta, Konstantin Severinov

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

The Escherichia coli cold shock protein CspA family consists of nine proteins (CspA to CspI), of which two, CspE and CspC, are constitutively produced at 37°C and are involved in regulation of expression of genes encoding stress response proteins but can also perform an essential function during cold acclimation. In this study, we analyzed global transcript profiles of cells lacking cspE and cspC as well as cells individually overexpressing these proteins or a CspE mutant that is unable to melt nucleic acids and is defective in cold acclimation. The analysis reveals sets of genes whose expression (i) is regulated by CspC and CspE at physiological temperature or cold shock conditions and (ii) depends on the nucleic acid melting function of CspE. Bioinformatic analysis of the latter group reveals that many of those genes contain promoter-proximal sequences that can block transcript elongation and may be targeted by the nucleic acid melting function of CspE.

Original languageEnglish (US)
Pages (from-to)2521-2527
Number of pages7
JournalJournal of bacteriology
Volume188
Issue number7
DOIs
StatePublished - Apr 2006

All Science Journal Classification (ASJC) codes

  • Microbiology
  • Molecular Biology

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