Abstract
The complete nucleotide sequence of the genome of the potexvirus, hydrangea ringspot virus, has been determined. The sequence is 6,185 nt in length, excluding the poly (A) tail, and contains six ORFs coding for proteins of 156, 26, 12, 8, 24, and 16 kDa, respectively. ORF 6 is contained within ORF 5 and in this respect the virus is similar to the potexviruses CsCMV, NMV, and SMYEV. Phylogenetic analysis of the putative products of the ORFs and signature motifs contained within these products shows the virus to be most closely related to CsCMV. A similar analysis of data for the coat proteins of potexviruses did not support the previously reported serological relationships between HdRSV and other potexviruses. This is the first complete sequence published for the genome of a potexvirus infecting a dicotyledonous, temperate, deciduous woody species.
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