The Plant Pathology Journal 2007;23(4):245-250.
Published online December 31, 2007.
Analysis of the Complete Genome Sequence of Zucchini yellow mosaic virusstrain A Isolated from Hollyhock
Seung Kook Choi, Ju Yeon Yoon, Seong Han Sohn
The complete genome sequence of Zucchini yellow mosaic virus stain A (ZYMV-A) isolated from a hollyhock (Althaea rosea) was determined by using RT-PCR with a series of primer sets. The virus genome consisted of 9593 nucleotides (nt), excluding the poly(A) tract at 3` terminus of the virus genome, with 5` and 3` untranslated region of 139 and 211 nt, respectively. The deduced polyprotein of ZYMV-A consisted of 3080 amino acid (aa) residues and was 351 kDa in molecular weight. All proteolytic cleavage sites of the polyprotein of ZYMV-A were compared with those of ZYMV strains, which showed the cleavage sites were conserved among ZYMV strains. The HC-Pro contained the KITC and PTK motifs, and the DAG motif was located at CP ORF of ZYMV-A, suggesting that ZYMV-A is aphid-transmissible. Phylogenetic tree analysis based on the complete genome among ZYMV strains or CP ORFs with other potyviruses showed ZYMV strains formed a distinct group. These results clearly confirmed that ZYMV-A was another distinct strain in ZYMV population at molecular level.
Key Words: full-legnth cDNA, Potyvirus, sequence analysis, squash, ZYMV

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