Conserved and variable elements in RNA genomes of potexviruses.
The nucleotide sequences of genomic RNAs and predicted amino acid sequences of two strains of potato virus X and white clover mosaic potexvirus were compared to each other, and the proteins of different plus-RNA-containing plant viruses. The predicted non-virion proteins of potexviruses have direct sequence homology and common structural peculiarities with those of several 'Sindbis-like' plant viruses. The most conserved amino acid sequences were found to be located in the polypeptide encoded by the long 5'-proximal open reading frame (ORF1). The putative polypeptide encoded by the ORF2 starting beyond the ORF1 stop codon is clearly related to the presumptive NTP-binding domain of the ORF1-coded polypeptide. These results suggest possible functions for all of the potexvirus proteins and also indicate that potexviruses have a genome organization which is considerably different from that of other plant viruses.
Skryabin
K G
KG
Department of Virology, Moscow State University, USSR.
Morozov SYu
Kraev
A S
AS
Rozanov
M N
MN
Chernov
B K
BK
Lukasheva
L I
LI
Atabekov
J G
JG
D000595:Amino Acid Sequence; D001483:Base Sequence; D005814:Genes, Viral; D008969:Molecular Sequence Data; D010942:Plant Viruses / Q000235:genetics*; D012367:RNA, Viral; D013045:Species Specificity; D014764:Viral Proteins / Q000235:genetics
D012367:RNA, Viral; D014764:Viral Proteins