title: A novel mycovirus identified from the rice false smut fungus Ustilaginoidea virens.
abstract: The complete sequence of a novel mycovirus infecting Ustilaginoidea virens, the causal agent of false smut of rice, is reported here and designated as Ustilaginoidea virens unassigned RNA virus HNND-1 (UvURV-HNND-1). This virus has an undivided dsRNA genome of 2903 nt in length and contains two non-overlapping open reading frames (ORF1 and 2), with the small ORF1 encoding a protein of unknown function that showed sequence similarity to the comparable protein in virus Alternaria longipes dsRNA virus 1(AlRV1) and a larger ORF2 encoded the protein showing identities to the RNA-dependent RNA polymerases of AlRV1 and some other unassigned dsRNA viruses. Phylogenetic analysis showed that UvURV-HNND-1 is more closely related to unclassified viruses such as AlRV1 and distinct from distantly related members of the family Partitiviridae. Here, we propose in accordance with previous reports that UvURV-HNND-1 might belong to a new mycovirus genus together with AlRV1 and other similar viruses.
authors.affiliation: Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests, Hunan Agricultural University, Nongda Road 1, Furong District, Changsha, 410128, China.
authors.forename: Hong Jian
authors.initials: HJ
authors.lastname: Zhu
authors.forename: Dan
authors.initials: D
authors.lastname: Chen
authors.forename: Jie
authors.initials: J
authors.lastname: Zhong
authors.forename: Shuai Yang
authors.initials: SY
authors.lastname: Zhang
authors.forename: Bi Da
authors.initials: BD
authors.lastname: Gao
mesh_terms: D016000:Cluster Analysis; D000067148:Fungal Viruses / Q000145:classification* / Q000302:isolation & purification*; D016679:Genome, Viral; D006999:Hypocreales / Q000302:isolation & purification / Q000821:virology*; D008969:Molecular Sequence Data; D016366:Open Reading Frames; D012275:Oryza / Q000382:microbiology; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology; D012328:RNA Viruses / Q000235:genetics* / Q000302:isolation & purification*; D012330:RNA, Double-Stranded / Q000235:genetics; D012367:RNA, Viral / Q000235:genetics*; D012324:RNA-Dependent RNA Polymerase / Q000235:genetics; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid
chemical_list: D012330:RNA, Double-Stranded; D012367:RNA, Viral; D012324:RNA-Dependent RNA Polymerase