Summary
The complete nucleotide sequence of apple mosaic ilarvirus (ApMV) RNA-3 has been determined from cloned viral cDNAs. The 5′ terminus of RNA-3 was determined by direct RNA sequencing, while the 3′ end was determined by polyadenylation of genomic RNA and sub-cloning using oligo dT. ApMV RNA-3 is 2056 bases in length and encodes at least two open reading frames. It is similar in size and genome organization to the RNA-3 of other members of theBromoviridae, which includes ilarviruses. The CP gene is in the 3′ half of the molecule, and another large open reading frame is upstream of the CP gene and can potentially encode a protein of 32 400 daltons. This peptide is the same size and shows limited sequence homology to an open reading frame located at the 5′ end of RNA 3 in tobacco streak and prune dwarf ilarviruses and alfalfa mosaic virus, which is postulated to be the viral movement protein. The nucleic acid sequence was not homologous to tobacco streak virus, prune dwarf virus, alfalfa mosaic virus or other members of theBromoviridae. The 5′-non-coding region of ApMV RNA-3 contains a 15 base palindromic sequence which encloses a sequence resembling the ICR-2 regions of eukaryotic tRNA gene promoters.
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Shiel, P.J., Alrefai, R.H., Domier, L.L. et al. The complete nucleotide sequence of apple mosaic virus RNA-3. Archives of Virology 140, 1247–1256 (1995). https://doi.org/10.1007/BF01322750
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DOI: https://doi.org/10.1007/BF01322750