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Nucleotide Sequence of the Capsid Protein Gene and 3' Non-coding Region of Papaya Mosaic Virus RNA

Department of Botany, University of Toronto, Toronto, Ontario, Canada, M5S 1A1

The nucleotide sequences of cDNA clones corresponding to the 3' OH end of papaya mosaic virus RNA have been determined. The 3'-terminal sequence obtained was 900 nucleotides in length, excluding the poly(A) tail, and contained an open reading frame capable of giving rise to a protein of 214 amino acid residues with an M_r of 22930. This protein was identified as the viral capsid protein. The 3' non-coding region of PMV genome RNA was about 121 nucleotides long [excluding the poly(A) tail] and homologous to the complementary sequence of the non-coding region at the 5' end of PMV RNA. A long open reading frame was also found in the predicted 5' end region of the negative strand.

Keywords: potexviruses, papaya mosaic virus, nucleotide sequence

Received 3 July 1987; accepted 28 September 1987.