Conserved and variable elements in RNA genomes of potexviruses |
| |
Authors: | K G Skryabin Kraev" target="_blank">A S Morozov SYuKraev M N Rozanov B K Chernov L I Lukasheva J G Atabekov |
| |
Institution: | Department of Virology, Moscow State University, USSR. |
| |
Abstract: | 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. |
| |
Keywords: | |
|