The genomic RNA of the potato virus X (PVX) strain HB, isolated in Bolivia and able to overcome all known resistance genes, has been cloned and sequenced. The PVX RNA sequence is 6432 nucleotides long and contains, similarly to the RNAs of other PVX strains, five open reading frames encoding proteins of s 165·1K, 24·5K, 12·4K, 7·6K and 25·1K (coat protein), respectively. Multiple amino acid sequence alignments of the coat proteins of four PVX strains identified eight amino acid residues unique for PVX. Structural prediction comparisons of the coat proteins of PVX and of the other strains suggest a general structural similarity. However, two of the eight amino acid residues unique for strain HB gave rise to a change in the predicted coat protein structure, suggesting a possible involvement in the resistance-breaking activity of PVX.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error