Quorum Sensing Mechanisms in Burkholderia Species

Quorum sensing in Burkholderia species constitutes a sophisticated network of chemical signalling that enables bacteria to gauge population density and coordinate collective behaviours. Central to this mechanism is the synthesis of acyl-homoserine lactones (AHLs) by LuxI-type enzymes and their detection by LuxR-type transcriptional regulators, forming a feedback loop that modulates gene expression. In plant-pathogenic members such as Burkholderia glumae and Burkholderia plantarii, AHL-mediated circuits control the production of virulence factors including the toxin toxoflavin and the secretion of oxalic acid, both of which contribute to disease symptoms in rice. In soil-dwelling or opportunistic species such as Burkholderia thailandensis and Burkholderia pseudomallei, multiple overlapping AHL systems govern biofilm formation, motility, secondary metabolite synthesis and interspecies competition. Hierarchical regulators, exemplified by IclR-family proteins, integrate with canonical LuxIR modules to fine-tune responses under varying environmental conditions. The diversity of signalling molecules and receptor specificities across Burkholderia underscores the evolutionary adaptation of quorum sensing to diverse ecological niches, from rhizosphere colonisation to chronic infections in humans. Understanding these pathways has global significance: it informs the development of targeted anti-virulence strategies in agriculture and medicine, offers routes to manipulate biosurfactant or biocontrol agent production, and reveals principles of microbial cooperativity and competition in complex communities.

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Quorum Sensing Mechanisms in Burkholderia Species publication trend

The graph below shows the total number of articles in quorum sensing mechanisms in burkholderia species across all publications each year (not limited to Nature Index journals).

Technical terms

Quorum sensing: Cell-to-cell communication system by which bacteria coordinate gene expression in response to population density.

Acyl-homoserine lactone (AHL): Small diffusible signalling molecule synthesised by LuxI-type enzymes and recognised by LuxR-type regulators.

LuxIR-type system: Canonical two-component quorum sensing circuit comprising an AHL synthase (LuxI) and its cognate receptor/transcriptional activator (LuxR).

Quorum quenching: Disruption of quorum sensing through enzymatic degradation or chemical interference with signalling molecules.

References

1. qsmR encoding an IclR-family transcriptional factor is a core pathogenic determinant of Burkholderia glumae beyond the acyl-homoserine lactone-mediated quorum-sensing system. PLOS Pathogens (2024).
2. A membrane protein of the rice pathogen Burkholderia glumae required for oxalic acid secretion and quorum sensing. Molecular Plant Pathology (2023).
3. Lactonase-mediated inhibition of quorum sensing largely alters phenotypes, proteome, and antimicrobial activities in Burkholderia thailandensis E264. Frontiers in Cellular and Infection Microbiology (2023).