Skip to Main content Skip to Navigation
Journal articles

A Novel Type of Polyhedral Viruses Infecting Hyperthermophilic Archaea

Abstract : Encapsidation of genetic material into polyhedral particles is one of the most common structural solutions employed by viruses infecting hosts in all three domains of life. Here, we describe a new virus of hyperthermophilic archaea, Sulfolobus polyhedral virus 1 (SPV1), which condenses its circular double-stranded DNA genome in a manner not previously observed for other known viruses. The genome complexed with virion proteins is wound up sinusoidally into a spherical coil which is surrounded by an envelope and further encased by an outer polyhedral capsid apparently composed of the 20-kDa virion protein. Lipids selectively acquired from the pool of host lipids are integral constituents of the virion. None of the major virion proteins of SPV1 show similarity to structural proteins of known viruses. However, minor structural proteins, which are predicted to mediate host recognition, are shared with other hyperthermophilic archaeal viruses infecting members of the order Sulfolobales The SPV1 genome consists of 20,222 bp and contains 45 open reading frames, only one-fifth of which could be functionally annotated.IMPORTANCE Viruses infecting hyperthermophilic archaea display a remarkable morphological diversity, often presenting architectural solutions not employed by known viruses of bacteria and eukaryotes. Here we present the isolation and characterization of Sulfolobus polyhedral virus 1, which condenses its genome into a unique spherical coil. Due to the original genomic and architectural features of SPV1, the virus should be considered a representative of a new viral family, "Portogloboviridae."
Complete list of metadatas

Cited literature [25 references]  Display  Hide  Download

https://hal-pasteur.archives-ouvertes.fr/pasteur-01977362
Contributor : Floran Bidault <>
Submitted on : Thursday, January 10, 2019 - 4:54:53 PM
Last modification on : Wednesday, April 29, 2020 - 2:14:16 PM
Long-term archiving on: : Thursday, April 11, 2019 - 5:47:30 PM

Licence


Distributed under a Creative Commons Attribution - NonCommercial - ShareAlike 4.0 International License

Identifiers

Collections

Citation

Ying Liu, Sonoko Ishino, Yoshizumi Ishino, Gerard Pehau-Arnaudet, Mart Krupovic, et al.. A Novel Type of Polyhedral Viruses Infecting Hyperthermophilic Archaea. Journal of Virology, American Society for Microbiology, 2017, 91 (13), pp.e00589-17. ⟨10.1128/JVI.00589-17⟩. ⟨pasteur-01977362⟩

Share

Metrics

Record views

119

Files downloads

344