FIG 4.

Intergenic regions upstream of genes acquired by lateral gene transfer were not acquired from LGT donor organisms. (A) The network of LGTs in MsV. Gene donor organisms are represented as colored circles connected to MsV. The thickness of the edges is proportional to the number of open reading frames transferred from an organism to MsV. The putative origins of intergenic regions found in MsV are depicted. (B) Venn diagram demonstrating the relationship among core genes, LGT genes, and genes regulated by the AAATATTT motif. (C) Representation of the number of motifs that control genes or available motifs that are present but do not control any genes. (D) Heat map showing that the AAATATTT promoter motif is homogeneously distributed in the genomes of marseillevirus lineages. APMV, Acanthamoeba polyphaga mimivirus; ATCV1, Acantocisto turfacea virus 1; ATV, Ambystoma tigrinum virus; EWPV, Erwinia phage; ISKNV, infectious spleen and kidney necrosis virus; IIV6, invertebrate iridescent virus 6; LDV, lymphocystis disease virus; OTAV, Ostreococcus tauri virus; OSTV, Ostreococcus virus; PBCV, Paramecium bursaria chlorella virus.