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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Nucleotide sequence and evolutionary relationships of cucumber mosaic virus (CMV) strains: CMV RNA 3.

The nucleotide sequence of RNA 3 of two subgroup I strains of cucumber mosaic virus (CMV), Fny-CMV and M-CMV, was determined and compared at both the nucleic acid and protein level with the previously determined, corresponding (partial) sequences of RNA 3 of five other subgroup I strains: C-CMV, D-CMV, I17F-CMV, O-CMV and Y-CMV. Fny-CMV RNA 3 is composed of 2216 nucleotides (nt) and M-CMV RNA 3 2214 nt. Both RNAs contain two open reading frames, the 3a gene and the coat protein gene. These RNAs showed very little nucleotide sequence divergence, either from each other or from the five other subgroup I strains. The nucleotide sequence variation observed was two to 13 differences in the 120 to 123 nt 5' non-translated regions, six to 17 differences in the 840 nt 3a genes, two to 15 differences in the 296 to 299 nt intergenic regions, three to 25 differences in the 657 nt coat protein genes and two to 10 differences in the 299 to 303 nt 3' non-translated regions. Protein sequence similarity was also high, with one to four differences in the 279 amino acids of the 3a proteins and two to 13 differences in the 218 amino acids of the coat proteins. Limited nucleotide sequence variation among nine strains of CMV was also shown using an RNA protection assay and a probe specific for Fny-CMV RNA 3. The limited variation shown by RNA 3 of strains of CMV with different passage histories, isolated in different countries over a 50 year period, suggests that the maintenance of the highly conserved nucleotide sequence may be important for other viral RNA functions or interactions.[1]


  1. Nucleotide sequence and evolutionary relationships of cucumber mosaic virus (CMV) strains: CMV RNA 3. Owen, J., Shintaku, M., Aeschleman, P., Ben Tahar, S., Palukaitis, P. J. Gen. Virol. (1990) [Pubmed]
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