The coat protein (CP) and movement protein (MP) sequences of a new tobamovirus infecting Hibiscus rosa-sinensis L were determined. The CP gene encodes 163 amino acid (aa) residues and with a theoretical molecular weight of 18.19 kDa. The MP gene encodes 282 amino acids and its theoretical molecular weight is 30.36 kDa. The nucleotide (nt) and aa sequences of the CP were 46.88 % to 51.63 % and 45.34 % to 57.06 % identical to other tobamoviruses, respectively. The nt and aa sequence identities of MP ranged from 38.81 % to 43.90 % and 30.85 % to 37.88 %, respectively. The predicted virion origin of assembly (OAS) was located in the CP gene. Phylogenetic trees generated based on the nt and aa sequences of both CP and MP genes indicate that this new virus clusters with members of subgroup II of tobamoviruses. Although this hibiscus virus shared a high nt and aa sequence identity with Sunn-hemp mosaic virus (SHMV), Western analysis showed that it is serologically unrelated to SHMV. We propose the name Hibiscus virus S (HVS) for this Singapore isolate. This is the first report on partial nt sequence of a tobamovirus that infects hibiscus.
Archives of Virology – Springer Journals
Published: Aug 1, 2002
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