FIG 3.
ubiT, -U, and -V occurrence and genetic architecture in proteobacterial genomes. (A) The proportion of genomes with (green) and without (red) all three genes, ubiTUV (left column), is indicated for each proteobacterial order known to synthesize UQ. The middle column, labeled 3-genes loci, displays the proportion of genomes with the three genes either at a single locus (green) or at different loci (red). The number of genomes analyzed for each order is given in the right column (Nb genomes). (B) Occurrence in the reference proteobacterial genomes of the marker proteins (UbiA, -E, and -G), of the O2-dependent hydroxylases, and of the UbiT,-U, and -V proteins. The number in boldface represents the 3 genomes (P. fulvum, M. marinus, and O. formigenes) containing exclusively the O2-independent pathway. (C) The distinct genetic architectures found for ubiT, -U, and -V in genomes where the three genes were present are displayed as boxes with different colors. The numbers of cases corresponding to each depicted architecture are given on the right. A white box corresponds to a gene found between the genes of interest, and a white box with dots corresponds to two to five genes between the genes of interest.