Details

Autor(en) / Beteiligte

• He, Zhenrui
• Zhao, Wenhua
• Fan, Yu
• Wang, Li
• Yang, Mei
• Yang, Yingqing
• Zhou, Erxun

Titel

Genome characterization of a novel narnavirus infecting the plant-pathogenic fungus Ustilaginoidea virens

Ist Teil von

• Archives of virology, 2024-04, Vol.169 (4), p.78-78

Ort / Verlag

Vienna: Springer Vienna

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Springer Nature - Complete Springer Journals

Beschreibungen/Notizen

• Mycoviruses are viruses that infect fungi and oomycetes. They are widespread in all major groups of plant-pathogenic fungi and oomycetes. To date, only the full genome of dsRNA mycoviruses and the contigs of positive-sense single-stranded RNA (+ssRNA) mycoviruses have been reported in Ustilaginoidea virens , which is the notorious causal agent of rice false smut (RFS). Here, we report the molecular characterization of a novel +ssRNA mycovirus, Ustilaginoidea virens narnavirus 4 (UvNV4), isolated from U. virens strain Uv418. UvNV4 has a genome of 3,131 nucleotides (nt) and possesses an open reading frame (ORF) predicted to encode an RNA-dependent RNA polymerase (RdRp) of 1,017 amino acids (aa) sequence with a molecular mass of 116.6 kDa. BLASTp analysis revealed that the RdRp showed 50.34% aa sequence identity to that of the previously described Zhangzhou Narna tick virus 1. Phylogenetic analysis indicated that UvNV4 is closely related to members of the family Narnaviridae . Taken together, these results clearly demonstrate that UvNV4 is a novel +ssRNA virus infecting U. virens .