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A giant virus infecting the amoeboflagellate Naegleria

Author

Listed:
  • Patrick Arthofer

    (Division of Microbial Ecology
    Doctoral School in Microbiology and Environmental Science)

  • Florian Panhölzl

    (Division of Microbial Ecology)

  • Vincent Delafont

    (UMR CNRS)

  • Alban Hay

    (UMR CNRS)

  • Siegfried Reipert

    (Research Support Facilities UBB)

  • Norbert Cyran

    (Research Support Facilities UBB)

  • Stefanie Wienkoop

    (Division of Molecular Systems Biology)

  • Anouk Willemsen

    (Division of Microbial Ecology)

  • Ines Sifaoui

    (Universidad de La Laguna
    Instituto de Salud Carlos III)

  • Iñigo Arberas-Jiménez

    (Universidad de La Laguna)

  • Frederik Schulz

    (Lawrence Berkeley National Laboratory)

  • Jacob Lorenzo-Morales

    (Universidad de La Laguna
    Instituto de Salud Carlos III)

  • Matthias Horn

    (Division of Microbial Ecology)

Abstract

Giant viruses (Nucleocytoviricota) are significant lethality agents of various eukaryotic hosts. Although metagenomics indicates their ubiquitous distribution, available giant virus isolates are restricted to a very small number of protist and algal hosts. Here we report on the first viral isolate that replicates in the amoeboflagellate Naegleria. This genus comprises the notorious human pathogen Naegleria fowleri, the causative agent of the rare but fatal primary amoebic meningoencephalitis. We have elucidated the structure and infection cycle of this giant virus, Catovirus naegleriensis (a.k.a. Naegleriavirus, NiV), and show its unique adaptations to its Naegleria host using fluorescence in situ hybridization, electron microscopy, genomics, and proteomics. Naegleriavirus is only the fourth isolate of the highly diverse subfamily Klosneuvirinae, and like its relatives the NiV genome contains a large number of translation genes, but lacks transfer RNAs (tRNAs). NiV has acquired genes from its Naegleria host, which code for heat shock proteins and apoptosis inhibiting factors, presumably for host interactions. Notably, NiV infection was lethal to all Naegleria species tested, including the human pathogen N. fowleri. This study expands our experimental framework for investigating giant viruses and may help to better understand the basic biology of the human pathogen N. fowleri.

Suggested Citation

  • Patrick Arthofer & Florian Panhölzl & Vincent Delafont & Alban Hay & Siegfried Reipert & Norbert Cyran & Stefanie Wienkoop & Anouk Willemsen & Ines Sifaoui & Iñigo Arberas-Jiménez & Frederik Schulz & , 2024. "A giant virus infecting the amoeboflagellate Naegleria," Nature Communications, Nature, vol. 15(1), pages 1-13, December.
  • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-47308-2
    DOI: 10.1038/s41467-024-47308-2
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    References listed on IDEAS

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