Characterization of burdock mottle virus, a novel member of the genus Benyvirus, and the identification of benyvirus-related sequences in the plant and insect genomes
文献类型： 外文期刊
作者： Kondo, Hideki 1 ; Hirano, Shuichi 1 ; Chiba, Sotaro 1 ; Andika, Ida Bagus 2 ; Hirai, Makoto 3 ; Maeda, Takanori 4 ; Ta 1 ;
作者机构： 1.Okayama Univ, IPSR, Kurashiki, Okayama 7100046, Japan
2.Zhejiang Acad Agr Sci, Inst Virol & Biotechnol, Hangzhou 310021, Zhejiang, Peoples R China
3.Gunma Univ, Grad Sch Med, Dept Parasitol, Maebashi, Gumma 3718511, Japan
4.Nihon Univ, Coll Bioresource Sci, Fujisawa, Kanagawa 2528510, Japan
关键词： AlkB;Benyvirus;Burdock mottle virus;Endogenous viral element;Paleovirology;Transcriptome shotgun assembly
期刊名称：VIRUS RESEARCH （ 影响因子：3.303； 五年影响因子：3.445 ）
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收录情况： SCI
摘要： The complete nucleotide sequence of the burdock mottle virus (BdMoV) isolated from an edible burdock plant ( Arctium lappa) in Japan has been determined. BdMoV has a bipartite genome, whose organization is similar to RNA1 and RNA2 of benyviruses, beet necrotic yellow vein virus (BNYVV), beet soil-borne mosaic virus (BSBMV), and rice stripe necrosis virus (RSNV). BdMoV RNA1 (7038 nt) contains a single open reading frame (ORF) encoding a 249-kDa polypeptide that consists of methyl-transferase, helicase, papain-like protease, AlkB-like, and RNA-dependent RNA polymerase domains. The AlkB-like domain sequence is not present in the proteins encoded by other known benyviruses, but is found in replication-associated proteins of viruses mainly belonging to the families Alfaflexiviridae and Betaflexiviridae. BdMoV RNA2 (4315 nt) contains six ORFs that are similar to those of benyviruses: these are coat protein (CP), CP readthrough, triple gene block movement and cysteine-rich proteins. Phylogenetic analyses showed that BdMoV is more closely related to BNYVV and BSBMV than to RSNV. Database searches showed that benyvirus replicase-related sequences are present in the chromosomes of a chickpea plant ( Cicer arietinum) and a blood-sucking insect ( Rhodnius prolixus). Some other benyvirus-related sequences are found in the transcriptome shotgun libraries of a few species of plants and a bark beetle. Our results show that BdMoV is a distinct species of the genus Benyvirus and that ancestral and extant benyviruses may have infected or currently infect a wide range of hosts, including plants and insects.
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