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. 2021 Aug;102(8):001633.
doi: 10.1099/jgv.0.001633.

ICTV Virus Taxonomy Profile: Marnaviridae 2021

Andrew S Lang  1 , Marli Vlok  2 , Alexander I Culley  3 , Curtis A Suttle  4 , Yoshitake Takao  5 , Yuji Tomaru  6 , Ictv Report Consortium
Affiliations

ICTV Virus Taxonomy Profile: Marnaviridae 2021

Andrew S Lang et al. J Gen Virol. 2021 Aug.

Abstract

The family Marnaviridae comprises small non-enveloped viruses with positive-sense RNA genomes of 8.6-9.6 kb. Isolates infect marine single-celled eukaryotes (protists) that come from diverse lineages. Some members are known from metagenomic studies of ocean virioplankton, with additional unclassified viruses described from metagenomic datasets derived from marine and freshwater environments. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Marnaviridae, which is available at ictv.global/report/marnaviridae.

Keywords: ICTV Report; Marnaviridae; taxonomy.

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Conflict of interest statement

The authors declare that there are no conflicts of interest.

Figures

Fig. 1.
Fig. 1.
Marnaviridae virion structure. (a) Negatively stained transmission electron micrograph of Heterosigma akashiwo RNA virus virions (scale bar=50 nm). (b) Cryo-electron microscopy reconstructed capsid structure at 3.1 Å resolution of Chaetoceros tenuissimus RNA virus type II (species Chaetenuissarnavirus II, genus Sogarnavirus) (PDB structure 6SHL viewed in NGL-WebGL). The three major capsid proteins are represented in dark blue (VP1), light blue (VP2) and yellow (VP3).
Fig. 2.
Fig. 2.
Genome architectures of viruses in the family Marnaviridae. IRES, internal ribosome entry site. RdRP, RNA-directed RNA polymerase. There is a putative IRES in the intergenic region (IGR) of the di-cistronic genomes.
See this image and copyright information in PMC

References

    1. Munke A, Kimura K, Tomaru Y, Okamoto K. Capsid structure of a marine algal virus of the order Picornavirales . J Virol. 2020;94:e01855–19. doi: 10.1128/JVI.01855-19. - DOI - PMC - PubMed
    1. Vlok M, Lang AS, Suttle CA. Application of a sequence-based taxonomic classification method to uncultured and unclassified marine single-stranded RNA viruses in the order Picornavirales . Virus Evol. 2019;5:vez056. doi: 10.1093/ve/vez056. - DOI - PMC - PubMed
    1. Tai V, Lawrence JE, Lang AS, Chan AM, Culley AI, et al. Characterization of HaRNAV, a single‐stranded RNA virus causing lysis of Heterosigma akashiwo (Raphidophyceae) . J Phycol. 2003;39:343–352.
    1. Nagasaki K, Tomaru Y, Katanozaka N, Shirai Y, Nishida K, et al. Isolation and characterization of a novel single-stranded RNA virus infecting the bloom-forming diatom Rhizosolenia setigera . Appl Environ Microbiol. 2004;70:704–711. doi: 10.1128/AEM.70.2.704-711.2004. - DOI - PMC - PubMed
    1. Tomaru Y, Takao Y, Suzuki H, Nagumo T, Nagasaki K. Isolation and characterization of a single-stranded RNA virus infecting the bloom-forming diatom Chaetoceros socialis . Appl Environ Microbiol. 2009;75:2375–2381. doi: 10.1128/AEM.02580-08. - DOI - PMC - PubMed

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