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Mining quorum sensing regulated proteins - Role of bacterial cell-to-cell communication in global gene regulation as assessed by proteomics


Eberl, L; Riedel, K (2011). Mining quorum sensing regulated proteins - Role of bacterial cell-to-cell communication in global gene regulation as assessed by proteomics. Proteomics, 11(15):3070-3085.

Abstract

Many bacteria utilize cell-to-cell communication systems that rely on small diffusible signal molecules to monitor the size of their population in a process known as quorum sensing (QS). QS plays a central role in coordinating genes that are generally mediating prokaryotic interactions with its eukaryotic host. In pathogens, this form of gene regulation is, for instance, believed to ensure that the cells remain invisible to the immune system until the pathogen has reached a critical population density sufficient to overwhelm host defenses and to establish an infection. This review summarizes proteome analyses to identify QS-regulated proteins focussing on Gram-negative bacteria interacting with their eukaryotic hosts either as symbionts or as pathogens. In most studies, the power of comparative 2-D PAGE coupled to MS analysis has been employed to recognize and identify QS-controlled proteins. The high number of QS-regulated proteins in the majority of the investigated species strongly supports the importance of QS as global regulatory system and suggests that it also operates via post-transcriptional mechanisms. As QS has been proven to be a central regulator for the expression of pathogenic traits and biofilm formation in various opportunistic pathogens, it represents a highly attractive target for the development of novel antibacterial drugs. Proteomics has also been exploited to validate the target specificity of natural and synthetic QS inhibitors that have a great potential as alternative therapeutics for the treatment of bacterial infections.

Abstract

Many bacteria utilize cell-to-cell communication systems that rely on small diffusible signal molecules to monitor the size of their population in a process known as quorum sensing (QS). QS plays a central role in coordinating genes that are generally mediating prokaryotic interactions with its eukaryotic host. In pathogens, this form of gene regulation is, for instance, believed to ensure that the cells remain invisible to the immune system until the pathogen has reached a critical population density sufficient to overwhelm host defenses and to establish an infection. This review summarizes proteome analyses to identify QS-regulated proteins focussing on Gram-negative bacteria interacting with their eukaryotic hosts either as symbionts or as pathogens. In most studies, the power of comparative 2-D PAGE coupled to MS analysis has been employed to recognize and identify QS-controlled proteins. The high number of QS-regulated proteins in the majority of the investigated species strongly supports the importance of QS as global regulatory system and suggests that it also operates via post-transcriptional mechanisms. As QS has been proven to be a central regulator for the expression of pathogenic traits and biofilm formation in various opportunistic pathogens, it represents a highly attractive target for the development of novel antibacterial drugs. Proteomics has also been exploited to validate the target specificity of natural and synthetic QS inhibitors that have a great potential as alternative therapeutics for the treatment of bacterial infections.

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11 citations in Web of Science®
13 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Plant and Microbial Biology
Dewey Decimal Classification:580 Plants (Botany)
Language:English
Date:2011
Deposited On:13 Mar 2012 12:36
Last Modified:05 Apr 2016 15:37
Publisher:Wiley-Blackwell
ISSN:1615-9853
Publisher DOI:https://doi.org/10.1002/pmic.201000814
PubMed ID:21548094

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