title: Taxonomic relationships between distinct potato virus Y isolates based on detailed comparisons of the viral coat proteins and 3'-nontranslated regions.
abstract: Detailed comparisons were made of the sequences of the coat protein (CP) cistrons and 3'-nontranslated regions (3'-NTR) of 21 (geographically) distinct isolates of potato virus Y (PVY) and a virus isolate initially described as pepper mottle virus (PepMoV). Multiple sequence alignments and phylogenetic relationships based on these alignments resulted into a subgrouping of virus isolates which largely corresponded with the historical strain differentiation based on biological criteria as host range, symptomatology and serology. Virus isolates belonging to the same subgroup shared a number of characteristic CP amino acid and 3'-NTR nucleotide residues indicating that, by using sequences from the 3'-terminal region of the potyvirus genome, a distinction could be made between different isolates of one virus species as well as between different virus species. RNA secondary structure analysis of the 3'-NTR of twelve PVY isolates revealed four major stem-loop structures of which, surprisingly, the loop sequences gave a similar clustering of isolates as resulting from the overall comparisons of CP and 3'-NTR sequences. This implies a biological significance of these structural elements.
authors.affiliation: Department of Virology, Wageningen Agricultural University, The Netherlands.
authors.forename: R A
authors.initials: RA
authors.lastname: van der Vlugt
authors.forename: J
authors.initials: J
authors.lastname: Leunissen
authors.forename: R
authors.initials: R
authors.lastname: Goldbach
mesh_terms: D000595:Amino Acid Sequence; D001483:Base Sequence; D002213:Capsid / Q000737:chemistry* / Q000235:genetics; D017124:Conserved Sequence; D005796:Genes / Q000235:genetics*; D007438:Introns / Q000235:genetics*; D008969:Molecular Sequence Data; D009690:Nucleic Acid Conformation; D010802:Phylogeny; D010942:Plant Viruses / Q000145:classification* / Q000235:genetics; D012367:RNA, Viral / Q000737:chemistry; D016415:Sequence Alignment; D012689:Sequence Homology, Nucleic Acid
chemical_list: D012367:RNA, Viral