Home Acta Virologica Ahead of print Acta Virologica Vol.66, No.3, p. 206 – 215, 2022

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Founded: 1957
ISSN 0001-723X
E-ISSN 1336-2305

Published in English

Impact Factor = 1.82

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Acta Virologica Vol.66, No.3, p. 206 – 215, 2022

Title: A novel RNA virus, Thesium chinense closterovirus 1, identified by high-throughput RNA-sequencing of the parasitic plant Thesium chinense
Author: Chaerim Shin, Dongjin Choi, Ken Shirasu, Yasunori Ichihashi, Yoonsoo Hahn

Abstract: The genome sequence of a closterovirus (genus Closterovirus, family Closteroviridae), tentatively named Thesium chinense closterovirus 1 (TcCV1), was identified by performing high-throughput RNA-sequencing of the haustoria and root tissues of Thesium chinense, a parasitic plant. The TcCV1 genome was predicted to encode nine proteins, eight of which have orthologs in previously identified closteroviruses. The TcCV1 RNA-dependent RNA polymerase (RdRp) and heat shock protein 70 homolog (Hsp70h) showed 27.8–68.2% and 23.8–55.1% amino acid identity, respectively, to orthologous proteins of known closteroviruses. The putative +1 ribosomal frameshifting site required for producing RdRp was identified as GUUUAGC with UAG stop codon and the skipped nucleotide U. Phylogenetic trees based on RdRp and Hsp70h show that TcCV1 is a novel member of the genus Closterovirus, forming a subclade with a group of known closteroviruses, including mint virus 1 and carnation necrotic fleck virus. The genome sequence of TcCV1 may be useful for studying the genome evolution of closteroviruses.

Keywords: Thesium chinense closterovirus 1; Closterovirus; Closteroviridae; Thesium chinense
Published online: 27-Aug-2022
Year: 2022, Volume: 66, Issue: 3 Page From: 206, Page To: 215

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