Complete genome sequence of viola mottle virus, revealing its synonymous relationship to tulip virus X.

Archives of Virology
Oki MatsumotoY Yamaji

Abstract

Viola mottle virus (VMoV) was discovered in Viola odorata showing symptoms of reduced growth, leaf mottling, and whitish stripes on flowers in northern Italy in 1977. This virus has been provisionally classified as a member of the genus Potexvirus based on its morphological, serological, and biological characteristics. However, since genetic information of VMoV has never been reported, the taxonomic status of this virus is unclear. Here, we report the first complete genome sequence of VMoV to clarify its taxonomic position. Its genomic RNA is 6,052 nucleotides long, excluding the 3'-terminal poly(A) tail, and has five open reading frames (ORFs) typical of potexviruses. Among potexviruses, VMoV showed the most similarity to tulip virus X (TVX) with 81.1-81.2% nucleotide and 90.4-90.7% amino acid sequence identity in ORF1 and 82.9-83.5% nucleotide and 93.2-95.2% amino acid sequence identity in ORF5. These values are much higher than the species demarcation threshold for the genus. Phylogenetic analysis also indicated that VMoV is nested within the clade of TVX isolates. These data demonstrate that VMoV and TVX are members of the same species.

References

Oct 5, 1990·Journal of Molecular Biology·S F AltschulD J Lipman
Sep 27, 2014·PloS One·Brejnev Muhizi MuhireDarren Patrick Martin
May 4, 2018·Molecular Biology and Evolution·Sudhir KumarKoichiro Tamura
Jun 12, 2019·Archives of Virology·S J WylieH Li
Jan 7, 2020·Molecular Biology and Evolution·Glen StecherSudhir Kumar
Jun 12, 2020·The Journal of General Virology·Jan F KreuzeIctv Report Consortium

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Software Mentioned

BLASTn
SDT
MUSCLE
ATGC
MEGA X

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