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Citation
Serio, A.W., Jeng, R.L., Haglund, C.M., Reed, S.C., Welch, M.D. (2010). Defining a Core Set of Actin Cytoskeletal Proteins Critical for Actin-Based Motility of Rickettsia.  Cell Host Microbe 7(5): 388--398.
FlyBase ID
FBrf0210774
Publication Type
Research paper
Abstract
Many Rickettsia species are intracellular bacterial pathogens that use actin-based motility for spread during infection. However, while other bacteria assemble actin tails consisting of branched networks, Rickettsia assemble long parallel actin bundles, suggesting the use of a distinct mechanism for exploiting actin. To identify the underlying mechanisms and host factors involved in Rickettsia parkeri actin-based motility, we performed an RNAi screen targeting 115 actin cytoskeletal genes in Drosophila cells. The screen delineated a set of four core proteins-profilin, fimbrin/T-plastin, capping protein, and cofilin--as crucial for determining actin tail length, organizing filament architecture, and enabling motility. In mammalian cells, these proteins were localized throughout R. parkeri tails, consistent with a role in motility. Profilin and fimbrin/T-plastin were critical for the motility of R. parkeri but not Listeria monocytogenes. Our results highlight key distinctions between the evolutionary strategies and molecular mechanisms employed by bacterial pathogens to assemble and organize actin.
Graphical Abstract
Obtained with permission from Cell Press.
PubMed ID
PubMed Central ID
PMC2935136 (PMC) (EuropePMC)
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Secondary IDs
    Language of Publication
    English
    Additional Languages of Abstract
    Parent Publication
    Publication Type
    Journal
    Abbreviation
    Cell Host Microbe
    Title
    Cell Host & Microbe
    Publication Year
    2007--
    ISBN/ISSN
    1931-3128 1934-6069
    Data From Reference
    Genes (31)
    Cell Lines (1)