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    Structure of a type IV secretion system core complex

    Fronzes, Remi and Schafer, Eva and Wang, Luchun and Saibil, Helen and Orlova, Elena and Waksman, Gabriel (2009) Structure of a type IV secretion system core complex. Science 323 (5911), pp. 266-268. ISSN 0036-8075.

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    Abstract

    Type IV secretion systems (T4SSs) are important virulence factors used by Gram-negative bacterial pathogens to inject effectors into host cells or to spread plasmids harboring antibiotic resistance genes. We report the 15 angstrom resolution cryo–electron microscopy structure of the core complex of a T4SS. The core complex is composed of three proteins, each present in 14 copies and forming a ~1.1-megadalton two-chambered, double membrane–spanning channel. The structure is double-walled, with each component apparently spanning a large part of the channel. The complex is open on the cytoplasmic side and constricted on the extracellular side. Overall, the T4SS core complex structure is different in both architecture and composition from the other known double membrane–spanning secretion system that has been structurally characterized.

    Metadata

    Item Type: Article
    School: Birkbeck Schools and Departments > School of Science > Biological Sciences
    Research Centre: Structural Molecular Biology, Institute of (ISMB)
    Depositing User: Administrator
    Date Deposited: 04 Aug 2010 14:09
    Last Modified: 06 Dec 2016 10:46
    URI: http://eprints.bbk.ac.uk/id/eprint/1066

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