Complete sequence of RNA1 of grapevine Anatolian ringspot virus

Complete sequence of RNA1 of grapevine Anatolian ringspot virus The nucleotide sequence of RNA1 of grapevine Anatolian ringspot virus (GARSV), a nepovirus of subgroup B, was determined from cDNA clones. It is 7,288 nucleotides in length excluding the 3′ terminal poly(A) tail and contains a large open reading frame (ORF), extending from nucleotides 272 to 7001, encoding a polypeptide of 2,243 amino acids with a predicted molecular mass of 250 kDa. The primary structure of the polyprotein, compared with that of other viral polyproteins, revealed the presence of all the characteristic domains of members of the order Picornavirales , i.e., the NTP-binding protein (1B Hel ), the viral genome-linked protein (1C VPg ), the proteinase (1D Prot ), the RNA-dependent RNA polymerase (1E Pol ), and of the protease cofactor (1A Pro-cof ) shared by members of the subfamily Comovirinae within the family Secoviridae . The cleavage sites predicted within the polyprotein were found to be in agreement with those previously reported for nepoviruses of subgroup B, processing from 1A to 1E proteins of 67, 64, 3, 23 and 92 kDa, respectively. The RNA1-encoded polyprotein (p1) shared the highest amino acid sequence identity (66 %) with tomato black ring virus (TBRV) and beet ringspot virus (BRSV). The 5′- and 3′-noncoding regions (NCRs) of GARSV-RNA1 shared 89 % and 95 % nucleotide sequence identity respectively with the corresponding regions in RNA2. Phylogenetic analysis confirmed the close relationship of GARSV to members of subgroup B of the genus Nepovirus . Archives of Virology Springer Journals

Complete sequence of RNA1 of grapevine Anatolian ringspot virus

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Springer Vienna
Copyright © 2012 by Springer-Verlag Wien
Biomedicine; Infectious Diseases; Virology; Medical Microbiology
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