title: Conserved and variable elements in RNA genomes of potexviruses.
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.
authors.affiliation: Department of Virology, Moscow State University, USSR.
authors.forename: K G
authors.initials: KG
authors.lastname: Skryabin
authors.lastname: Morozov SYu
authors.forename: A S
authors.initials: AS
authors.lastname: Kraev
authors.forename: M N
authors.initials: MN
authors.lastname: Rozanov
authors.forename: B K
authors.initials: BK
authors.lastname: Chernov
authors.forename: L I
authors.initials: LI
authors.lastname: Lukasheva
authors.forename: J G
authors.initials: JG
authors.lastname: Atabekov
mesh_terms: 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
chemical_list: D012367:RNA, Viral; D014764:Viral Proteins