Abstract
Advances in molecular techniques used in viral metagenomics coupled with high throughput sequencing is rapidly expanding our knowledge of plant-associated virus diversity. Applying such approaches, we have identified five novel circular replication-associated protein (Rep)-encoding single-stranded (CRESS) DNA viruses from Poaceae and Apiaceae plant from South Africa and New Zealand. These viruses have a simple genomic organization, including two open reading frames that likely encode a Rep and a capsid protein (CP), a conserved nonanucleotide motif on the apex of a putative stem loop structure, and conserved rolling-circle replication and helicase motifs within their likely Rep: all suggesting that they replicate through rolling-circle replication. The Reps and the CPs putatively encoded by these five novel viruses share low to moderate degrees of similarity (22.1 - 44.6%) with other CRESS DNA viruses.
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Acknowledgements
D.P.M., G.W.H. and A.V. have received research Grants from the National Research Foundation of South Africa. P.R. has received an EU Grant FP7-PEOPLE-2013-IOF (No. PIOF-GA-2013-622571). This work was supported by Direction Générale de l’Armement, MEM INRA Metaprogram, the Fondation pour la Recherche. GenBank Accession Numbers: MH425569–MH425573.
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Supplementary Table 1:
Details of primers used to recover the circular genomic DNA molecules of AeaV, HlaV, LpaV, PeaV and SaV (DOCX 12 kb)
Supplementary Table 2:
Summary of the CRESS DNA viruses which have Rep sequences that are most closely related to those of AeaV, HlaV, LpaV, PeaV and SaV (Hit-CRESS dataset) and which were used to construct the phylogenetic trees presented in Figure 1 (DOCX 19 kb)
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Richet, C., Kraberger, S., Filloux, D. et al. Novel circular DNA viruses associated with Apiaceae and Poaceae from South Africa and New Zealand. Arch Virol 164, 237–242 (2019). https://doi.org/10.1007/s00705-018-4031-3
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DOI: https://doi.org/10.1007/s00705-018-4031-3