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Volume 3 Issue 11, November 2018

Volume 3 Issue 11

TagA helps T6SS to hold their fire

The adaptation of APEX2-dependent proximity biotinylation for use in bacteria enables the identification of binding partners of TssA, which controls T6SS sheath assembly. This approach identifies TagA as a TssA partner that stops sheath polymerization and clamps the extended sheath to the membrane.

See Cascales et al.

Image: Yoann Santin, Thierry Doan, Hugo Le Guenno and Eric Cascales. Cover design: Samantha Whitham.

Editorial

  • Editorial |

    Access to toilets and basic sanitation systems revolutionized living environments and reduced the burden from diarrhoeal diseases in the developed world. With more than half of the global population still living without access to a household toilet, the need to tackle this feculent problem requires greater prominence.

News & Views

  • News & Views |

    A powerful in vivo biotinylation approach identifies TagA as a binding partner of TssA, a central regulator of the assembly of the type VI secretion system (T6SS). TagA terminates assembly of the T6SS tail and tethers it to the membrane, acting as a crossbow latch that allows for efficient firing.

    • Olivera Francetic
  • News & Views |

    Protein translocation across bacterial membranes can take many routes through dedicated transport machines. A new study finds that Salmonella Typhi utilizes a distinct pathway to translocate typhoid toxin across the peptidoglycan layer and prime the bacterium for host intoxication.

    • Anastassios Economou
  • News & Views |

    The discovery of CD153 as a novel driver of T-cell-mediated host defence against Mycobacterium tuberculosis infection advances our understanding of the requirements for protective immunity. Future investigation of CD153 as a potential correlate of tuberculosis immunity could open new avenues for vaccine design.

    • Sara B. Cohen
    • Kevin B. Urdahl
  • News & Views |

    A key step of the antiviral immune response is detection of the viral intruder. Infection with highly pathogenic strains of influenza virus is now shown to produce short aberrant viral RNAs that potently trigger activation of innate immunity.

    • William Riedl
    • Michaela U. Gack

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