Abstract
The complete sequence and genome organisation of an endornavirus from the phytopathogenic fungus Sclerotinia sclerotiorum isolate 11691 was described and the name Sclerotinia sclerotiorum endornavirus 1 (SsEV1/11691) proposed. The genome is 10,513 nucleotides (nts) long with a single open reading frame (ORF) that codes for a single polyprotein of 3459 amino acid (aa) residues. The polyprotein contains cysteine-rich region (CRR), viral methyltransferase (MTR), putative DEXDc, viral helicase (Hel), phytoreo_S7 (S7) and RNA-dependent RNA polymerase (RdRp) domains. The polyprotein and the conserved domains are phylogenetically related to endornaviruses. However, the coding strand of SsEV1/11691 does not contain a site-specific nick characteristic of most previously described endornaviruses. The elimination of SsEV1/11691 did not result in any significant changes in the host phenotype and virulence.
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