The 3′-terminal sequence of hop mosaic virus (HpMV) genomic RNA was determined. A cDNA of approximately 1.8 kbp was amplified from the HpMV genome by 3′ RACE using a degenerate primer, which was designed to anneal to the overlapping region of open reading frames (ORFs) 2 and 3 of eight carlavirus genomes. The sequence contained three ORFs, encoding proteins of 7-, 34-, and 11-kDa, which corresponded to ORFs 4, 5, and 6 of the carlavirus genome, respectively. The amino acid sequence of ORF 5, encoding the coat protein (CP) of HpMV, shows the highest identity (67%) to that of Hop latent virus (HpLV). The HpMV CP N-terminal sequence differs from that of HpLV, but the central and C-terminal sequences of the CP of both viruses are similar. The sequence similarity possibly causes the cross-reaction of heterologous antibodies of HpMV and HpLV. Phylogenetic analyses based on the CP amino acid and 3′ non-coding region sequences indicate close relationships among HpMV, HpLV, and Potato virus M. We report here the first molecular characterization of HpMV genomic RNA.
Archives of Virology – Springer Journals
Published: Oct 1, 2001
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