Fig. 1.

Distribution and conservation of putative transcriptional regulators in the Chlamydiae. The plot shows gene presence and absence of predicted regulators for members of the phylum Chlamydiae (yellow background indicates members of the family Chlamydiaceae; green background indicates environmental chlamydiae). The species phylogeny shown was calculated from a concatenation of 33 markers genes using PhyloBayes (Lartillot et al. 2013) under the CAT-GTR model. The box inlay displays those genes that are conserved throughout different taxonomic levels. We included AtoC as a globally conserved regulator, as it is only absent in the incomplete genome of Criblamydia (*). pc1704 refers to the Protochlamydia amoebophila UWE25 locus tag of the conserved, yet uncharacterized protein.