Characterization of a novel gammapartitivirus infecting the phytopathogenic fungus Pyricularia oryzae

In this study, we identified a novel double-strand RNA (dsRNA) mycovirus inPyricularia oryzae, designated"Magnaporthe oryzae partitivirus 4" (MoPV4). The genome of MoPV4 consists of a dsRNA-1 segment encoding an RNA-dependent RNA polymerase (RdRP) and a dsRNA-2 segment encoding a capsid protein (CP). Phylogenetic analysis indicated that MoPV4 belongs to the genusGammapartitivirus within familyPartitiviridae. The particles of MoPV4 are isometric with a diameter of about 32.4 nm. Three-dimensional structure predictions indicated that the RdRP of MoPV4 forms a classical right-handed conformation, while the CP has a reclining-V shape.

Source: Archives of Virology - April 18, 2024 Category: Virology Source Type: research