Microbial Quorum Sensing and Its Role in Biofilm Formation

Abstract

Quorum sensing is defined as the effect of fluctuation in cells density on the regulation of gene expression within the cell. Approximately all bacteria produce small molecules (auto-inducers) to control Quorum sensing. S-adenosylmethionine (SAM) is responsible for auto-inducers production in Gram-negative bacteria. Auto-inducers interaction with particular receptors provokes different behaviours that are under the control of Quorum sensing The presence of fungal Quorum sensing systems was bare eleven years before after the sighting that farnesol panels filamentation in the pathogenic polymorphic fungus Candida albicans. In the previous era, farnesol has been shown to play manifold roles in C. albicans physiology as a signalling molecule and encouragement damaging effects on host cells and other microbes. In addition to farnesol, the aromatic alcohol tyrosol was also initiated to be a C. albicans QSM regulatory growth, morphogenesis and bio film formation. In Saccharomyces cerevisiae, two other aromatic alcohols, phenyl ethanol and tryptophol were found to be QSMs regulating morphogenesis during nitrogen starvation conditions. Moreover, population density-dependent performances that look like QS have been labelled in numerous other fungal species. Although fungal QS investigation is still in its beginning, its detection has changed our opinions about the fungal kingdom and might ultimately lead to the growth of new antifungal therapeutics.