Electron microscopy articles within Nature Communications

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  • Article
    | Open Access

    Bacterial type III secretion systems (T3SSs) inject virulence effector proteins into eukaryotic cells and are activated by host membrane contact. Here the authors report the in situ structure of the Chlamydia trachomatisT3SS in the presence or absence of host membrane, and observe compaction of the basal body embedded in the bacterial envelope.

    • Andrea Nans
    • , Mikhail Kudryashev
    •  & Richard D. Hayward

  • Article
    | Open Access

    Dispersed lipid self-assembly can form various types of particles, including cubosomes, which are useful for drug delivery. Here, Demurtas et al. visualize their three-dimensional structure, showing two continuous water channels separated by lipid bilayers and the mechanism of particle stabilization.

    • Davide Demurtas
    • , Paul Guichard
    •  & Laurent Sagalowicz

  • Article
    | Open Access

    Large-scale dense reconstruction of neuronal circuits (or connectomics) requires methods for large-volume dense en-blocelectron microscopy (EM) staining. Here the authors develop a protocol for staining tissue blocks from mouse neocortex sized at least 1 mm in diameter, enabling correlated functional and structural circuit analyses.

    • Yunfeng Hua
    • , Philip Laserstein
    •  & Moritz Helmstaedter

  • Article
    | Open Access

    The Hepatitis C virus (HCV) relies on an internal ribosome entry site (IRES) for translation of all the proteins encoded by its single-stranded RNA genome. Here the authors present a near-atomic cryo-EM structure of the HCV IRES bound to the human ribosome, shedding light on the initiation mechanism of HCV's and related IRESs.

    • Nick Quade
    • , Daniel Boehringer
    •  & Nenad Ban

  • Article
    | Open Access

    Tailed bacteriophages translocate the genome into and out of the capsid through a portal protein assembly located between the phage s head and tail. Here Sun et al. provide a cryo-EM structure of the bacteriophage T4 portal protein assembly, suggesting the functions and evolution of the portal structure.

    • Lei Sun
    • , Xinzheng Zhang
    •  & Michael G. Rossmann

  • Article
    | Open Access

    The proteasome is a highly regulated complex fundamental for cell homeostasis and a target for cancer therapy. Here the authors use cryo-EM and single-particle analysis to obtain a detailed map of the interactions between each active sites of the core 20S proteasome and the irreversible inhibitor AdaAhx3L3VS.

    • Paula C.A. da Fonseca
    •  & Edward P. Morris

  • Article
    | Open Access

    Preparing biological material for electron microscopy (EM) involves harsh processing steps that can poorly preserve cellular ultrastructure. Here the authors apply a single layer of graphene onto wet cells to enable direct EM using low voltage, and correlate actin filaments and mitochondria using super-resolution microscopy.

    • Michal Wojcik
    • , Margaret Hauser
    •  & Ke Xu

  • Article |

    While the cytosolic translation machinery is well characterized, the mitochondrial translation system remains largely elusive. Using cryo-electron tomography, Pfeffer et al. describe the ordered organization of mitochondrial polysomes in which each ribosome is tethered to the inner membrane by two defined contacts on the large subunit in situ.

    • Stefan Pfeffer
    • , Michael W. Woellhaf
    •  & Friedrich Förster

  • Article |

    Solving structures of large protein complexes remains a significant challenge for structural biologists. Demers et al. determine the atomic structure of a Shigellatype-III secretion system using a Rosetta-based modelling strategy that draws on both solid-state NMR and cryo-electron microscopy data sets.

    • Jean-Philippe Demers
    • , Birgit Habenstein
    •  & Nikolaos G. Sgourakis

  • Article
    | Open Access

    Few tools are available to identify active membrane proteins within their native lipid environment. Here, Gold et al. report on a strategy that can be used for site-specific labelling of membrane proteins via electron cryotomography.

    • Vicki A.M. Gold
    • , Raffaele Ieva
    •  & Werner Kühlbrandt

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