1887

Abstract

The nucleotide sequence of the large (L) RNA segment of Dugbe (DUG) virus () was determined, completing the first entire genome sequence of a nairovirus. The L segment comprised 12255 nucleotides, making a total genome size of 18855 nucleotides, and the ends showed identity with the ends of the medium (M) and small (S) genomic segments. A single open reading frame (ORF) was present in the viral complementary strand, sufficient to encode a protein of 459 kDa. The predicted protein sequence showed the core polymerase motifs characteristic of the RNA-dependent RNA polymerases of segmented negative-stranded viruses. Comparison of the conserved motifs with the corresponding region of other segmented negative-strand viruses showed a closer relationship between nairoviruses and phleboviruses than with other or with other virus families. However, the core polymerase was the only function that could be assigned to a region of the DUG L gene.

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1996-08-01
2024-04-19
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