Analysis of bracovirus segment PTP gene syntheny. Orthologous and paralogous genomic regions from CcBV, CvBV, GiBV and GfBV are represented. PTP gene names correspond to those used in Genbank and the accession numbers of the segments are indicated. Phylogenetically related genes are indicated with the same colour. This color code is used throughout the publication. The lines indicate the block of homologous genes (A) Orthologous genes between CcBV circle 1 and related segments from CvBV, GiBV and GfBV, (B) Orthologous and paralogous genes between CcBV circle 17 and 10 and related segments, (C) Orthologous and paralogous genes between CcBV circle 26 and related segments. Stars indicate gene acquisitions and triangles gene losses. Proposed scenario of gene acquisition and loss in B (see the text for A and C): An ancestral segment was duplicated in mirror. Since this duplication the CcBV PTP N ortholog was lost specifically by GfBV. The homologues of CvBV PTP 35 and 19 were lost by CcBV, GiBV-seg23-PTP 160 and GfBV-seg23-PTP 110 orthologs were lost by both CcBV and CvBV (or acquired specifically in the Glypatapanteles lineage) and Glyptapanteles orthologs of CcBV PTP T was lost. (D) Isolated paralogous PTPs (PTP R) produced by dispersed duplications in CcBV circle 7 and CvBV segment 30. (E) Map of the regions of similarities between progenitor PTP Δ and the dispersed copy PTP R including 5’ and 3’ UTR sequences. The region in light grey corresponds to a stretch of non-homologous sequence.
Serbielle et al. BMC Evolutionary Biology 2012 12:253 doi:10.1186/1471-2148-12-253