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Fig. 6 | BMC Evolutionary Biology

Fig. 6

From: Diversity and evolution of ABC proteins in mycorrhiza-forming fungi

Fig. 6

Inactivation of an ABC transporter-encoding gene due to insertion of a transposable element. The scheme illustrates three closely related homologous genes from the genomes of M. bicolor and M. variabilis. All three genes belong to the group ABCC5 of ABC-C transporters. The gene models Melva_477483 and Melbi_641095 are presumably intact, whereas the gene Melbi_656557 harbours a DNA transposon insertion that likely has caused its inactivation. All three gene models share the same exon-intron structure with 16 exons shown as open rectangles. 5´- and 3´-untranslated regions in the model Melva_477483 are shadowed grey. The exon 3 in the model Melbi_656557 is disrupted by the insertion of repetitive DNA carrying a putative transposase-encoding ORF (shown by a filled arrow). In comparison with the models Melva_477483 and Melbi_641095, the model Melbi_656557 also has three stop codons within the reading frame (indicated by filled triangles) and a putative translational frame-shift (indicated by an asterisk). Note that the last exon in the model Melbi_656557 is truncated. Accumulation of these mutations probably occurred after the gene has been inactivated by the transposon insertion

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