Abstract:Dynamical properties of gene-regulatory networks are tuned to ensure bacterial survival. In mycobacteria, MprAB-σ E network responds to the presence of stressors, such as surfactants causing surface stress. Positive feedback loops in this network were previously predicted to cause hysteresis, i.e. different responses to identical stressor levels for pre-stressed and unstressed cells. Here we show that hysteresis does not occur in non-pathogenic Mycobacterium smegmatis but occurs in Mycobacterium tuberculosis (… Show more
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