Abstract
The complete genome sequence of a novel mycovirus, Phoma matteucciicola RNA virus 1 (PmRV1), derived from Phoma matteucciicola strain LG-01, was sequenced and analyzed. The complete cDNA sequence of PmRV1 is 3432 bp in length with a GC content of 57.17%. The genome of PmRV1 contains two putative open reading frames (ORFs): ORF1 and ORF2. ORF1 encodes a hypothetical protein with significant similarity to a protein encoded by Periconia macrospinosa ambiguivirus 1 (PmAV1). ORF2 encodes a protein of 491 amino acids with a conserved RNA-dependent RNA polymerase (RdRp) domain. Additionally, the triad within domain III has an asparagine (GDN) instead of the nearly universally conserved aspartic acid (GDD). RdRp phylogeny showed that PmRV1 grouped together with PmAV1 as a sister branch of a new member of the recently proposed family of mycotombus-like viruses. This is first report of the complete sequence of a novel mycovirus, PmRV1, infecting Phoma matteucciicola strain LG-01, the causal agent of leaf blight of Curcuma wenyujin.
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