The beet virus Q coat protein readthrough domain is longer than previously reported, with two transmembrane domains.
Ten beet virus Q (BVQ) strains from six different countries were sequenced to characterize the readthrough (RT) domain of the coat protein (CP). The GenBank/EMBL/DDBJ accession numbers for the sequences reported in this paper are FM244643-FM244652. With three nucleotide additions of 5, 285 and 1 nt, the common RT of 76 kDa was found to be longer than the single reference available to date (35 kDa). It is hypothesized that multiple inoculation cycles on Chenopodium quinoa were responsible for these three deletions in the C-terminal part of the BVQ RNA-2 previously described. Two putative transmembrane domains, TM1 and TM2, were predicted in the consensus amino acid sequence of the ten BVQ strains, and the putative BVQ TM2 was aligned with that of potato mop-top virus.
Crutzen
François
F
Université Catholique de Louvain, Unité de Phytopathologie, Place Croix du Sud 2, Bte 3, B-1348 Louvain la-Neuve, Belgium.
Kreit
Marguerite
M
Université Catholique de Louvain, Unité de Phytopathologie, Place Croix du Sud 2, Bte 3, B-1348 Louvain la-Neuve, Belgium.
Bragard
Claude
C
Université Catholique de Louvain, Unité de Phytopathologie, Place Croix du Sud 2, Bte 3, B-1348 Louvain la-Neuve, Belgium.
D000595:Amino Acid Sequence; D027461:Beta vulgaris / Q000821:virology*; D036022:Capsid Proteins / Q000737:chemistry* / Q000235:genetics; D027465:Chenopodium quinoa / Q000821:virology; D008969:Molecular Sequence Data; D017434:Protein Structure, Tertiary / Q000235:genetics*; D012328:RNA Viruses / Q000737:chemistry* / Q000235:genetics; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017384:Sequence Deletion
D036022:Capsid Proteins