Abstract

The complete sequence of the single-stranded, positive-sense RNA genome of pea stem necrosis virus (PSNV) has been determined. The 4,048-nucleotide genome contains five open reading frames (ORFs). The 5′-proximal ORF encodes a 25-kD protein (p25). If the amber termination codon is read through, the ORF produces a read-through protein of 84 kD (p84). Two small, centrally located ORFs encoded a 7-kD protein (p7) and a 6-kD protein (p6), respectively. The 38-proximal ORF encodes a 38-kD (p38) capsid protein. Comparison of the genome organization with that of other viruses justifies the assignment of PSNV to the genus Carmovirus.

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