Review on Stress induced response in Escherichia coli

Rashmi Mittal, Md. Riyazzudin, Mohd Urooj, Narender Chaudhry

Abstract


Rpos provides resistance to cell against damage by triggering many downstream effector peoteins which acts as master regulator of the stress. Change in the composition of cell envelope and complete change in morphology of E. coli is result of Rpos activated genes. Heat shock response is a defensive mechanism in bacteria which deals with heat induced damage to proteins by producing heat shock proteins (HSPs). Heat shock response is moderated by sigma factors σ32. For initiation of HSPs the heat shock promoters σ32 directs transcription of RNA polymerase and finally induces the HSPs. Due to the downshift of temperature, the transcription of heat shock genes gradually gets reduced. This article will also provide a detailed study about the response of E. coli to acid stress. Due to acid stress proton leakage is faster in E. coli than the cell capability to control homeostasis under severe acidic pH. The main aim of the article is to understand the adaptations of E. coli under various stress conditions by activation of Rpos genes.

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