Figure 1 LTR and genome organization of Saccharomyces cerevisiae Ty3 virus (SceTy3V), Drosophila melanogaster gypsy virus, (DmeGypV), and Schizosaccharomyces pombe Tf1 virus (SpoTf1V). Black boxes within the LTRs depict sequences repeated at the 5 and 3 ends of the element transcripts (R regions); sequences 5 of R represent U3, and sequences 3 of R represent U5. Open boxes below the elements indicate gag and pol. Conserved amino acid sequences in pol that identify protease (PR), integrase (IN) and reverse transcriptase/RNAse H (RT) are labeled. Individual mRNAs are depicted as arrows. Arrowheads indicate sites of ribosomal frameshifting.
Figure 2 Phylogenetic relationships of the family Metaviridae. The analysis was identical to that in Figure 1. The tree was rooted using sequences of members of the family Pseudoviridae. FoxSkiV is a reverse transcriptase sequence from the genome of Fusarium oxysporum assumed to be associated with a full retrotransposon sequence, but the full sequence has not yet been determined, hence it is not listed as a species in this description.
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