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    Quorum sensing-controlled buoyancy through gas vesicles: Intracellular bacterial microcompartments for environmental adaptation

    Access Status
    Open access via publisher
    Authors
    Ramsay, Joshua
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Ramsay, J. 2012. Quorum sensing-controlled buoyancy through gas vesicles: Intracellular bacterial microcompartments for environmental adaptation. Communicative and Integrative Biology. 5 (1): pp. 96-98.
    Source Title
    Communicative and Integrative Biology
    DOI
    10.4161/cib.18532
    School
    School of Biomedical Sciences
    URI
    http://hdl.handle.net/20.500.11937/7850
    Collection
    • Curtin Research Publications
    Abstract

    Gas vesicles are gas-filled microcompartments produced by many cyanobacteria and haloarchaea to regulate buoyancy and control positioning in the water column. Recently we identified the first case of gas vesicle production by a member of the Enterobacteriaceae, Serratia sp ATCC39006. Gas vesicle production enabled colonisation of the air-liquid interface and was positively regulated in low-oxygen conditions, suggesting development of these intracellular organelles is an adpative mechanism facilitating migration to the water surface. Vesicle production was also regulated by the intercellular communication molecule N‑butanoyl-L‑homoserine lactone (BHL) showing that gas vesicle production is controlled at the population level, through quorum sensing, with BHL acting as a morphogen. Gas vesicle production was also reciprocally regulated with flagella-driven swarming motility by the global regulatory protein RsmA, suggesting a fork in the regulatory pathway that controls induction of these distinct modes of mobility. Here we discuss these findings in the context of the interesting physiology of Serratia 39006 and highlight future prospects for gas vesicle research in this highly tractable strain.

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