Analyses of TT virus full-length genomic sequences - PubMed (original) (raw)
Analyses of TT virus full-length genomic sequences
J C Erker et al. J Gen Virol. 1999 Jul.
Abstract
Since the identification of TT virus, only one full-length and two near full-length sequences representing a single subtype of the virus have been reported. In order to understand further the nature of the TT virus genome, nine of the most divergent TT virus sequences have been extended to full-length or near full-length. Phylogenetic analysis demonstrated that these sequences represent three distinct TT virus genotypes and two subtypes. A high degree of nucleotide sequence variability (approximately 30%) was observed across the genomes with several significantly more divergent regions. Three conserved ORFs were identified, none of which shared significant amino acid sequence identity to sequences present in public databases. Additionally, sequence motifs, such as those necessary for protein translation and for rolling circle replication, were found to be partially conserved between all TT virus isolates.
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