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K. Seyer, M. Lessard, G. Piette, M. Lacroix and L. Saucier, “Escherichia coli Heat Shock Protein DnaK: Production and Its Consequences in Terms of Monitoring Cooking,” Applied and Environmental Microbiology, Vol. 69, No. 6, 2003, pp. 3231-3237. doi:10.1128/AEM.69.6.3231-3237.2003

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• TITLE: Induction of DnaK upon γ-Irradiation at High and Low Rates in Escherichia coli

  AUTHORS: Linda Saucier, Claudine Dube, Anthony Guernec, Fadia Naim

  KEYWORDS: DnaK; Chaperone; Irradiation; Bacterial Stress Response; Efficacy of Antimicrobials

  JOURNAL NAME: Food and Nutrition Sciences, Vol.3 No.10, October 12, 2012

  ABSTRACT: DnaK is implicated in protein folding, repair and degradation. Its protective role during heat shock is well documented and many other stresses can also induce its production. Using a competitive ELISA, intracellular DnaK concentrations were determined in Escherichia coli ATCC 25922 exposed to a γ-irradiation dose of 0.3 KGy applied either at high (8 × 10-2 KGy/min) or low rates (3 × 10-3 KGy/min) and with or without a recuperation period of 22 h at 37℃ post-treatment. All four irradiation treatments reduced cell counts similarly and significantly compared to the control (P