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Enterovirus particles expel capsid pentamers to enable genome release

Author

Listed:
  • David Buchta

    (Masaryk University)

  • Tibor Füzik

    (Masaryk University)

  • Dominik Hrebík

    (Masaryk University)

  • Yevgen Levdansky

    (Masaryk University
    Max Planck Institute for Developmental Biology)

  • Lukáš Sukeník

    (Masaryk University
    Masaryk University)

  • Liya Mukhamedova

    (Masaryk University)

  • Jana Moravcová

    (Masaryk University)

  • Robert Vácha

    (Masaryk University
    Masaryk University)

  • Pavel Plevka

    (Masaryk University)

Abstract

Viruses from the genus Enterovirus are important human pathogens. Receptor binding or exposure to acidic pH in endosomes converts enterovirus particles to an activated state that is required for genome release. However, the mechanism of enterovirus uncoating is not well understood. Here, we use cryo-electron microscopy to visualize virions of human echovirus 18 in the process of genome release. We discover that the exit of the RNA from the particle of echovirus 18 results in a loss of one, two, or three adjacent capsid-protein pentamers. The opening in the capsid, which is more than 120 Å in diameter, enables the release of the genome without the need to unwind its putative double-stranded RNA segments. We also detect capsids lacking pentamers during genome release from echovirus 30. Thus, our findings uncover a mechanism of enterovirus genome release that could become target for antiviral drugs.

Suggested Citation

  • David Buchta & Tibor Füzik & Dominik Hrebík & Yevgen Levdansky & Lukáš Sukeník & Liya Mukhamedova & Jana Moravcová & Robert Vácha & Pavel Plevka, 2019. "Enterovirus particles expel capsid pentamers to enable genome release," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-09132-x
    DOI: 10.1038/s41467-019-09132-x
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