The deeper branching and distinctness of Bradyrhizobiaceae and Methylobacteriaceae from other Rhizobiales is also strongly supported by phylogenetic analyses based on different gene sequences and conserved indels in many proteins [1,17,45].
Trp-tRNA synthetase, LytB metalloproteinase) provide evidence that that the Bradyrhizobiaceae family is distantly related to other Rhizobiales (Rhizobiaceae, Brucellaceae, Phyllobacteriaceae), and it has branched prior to the latter groups of species [1,17,45].
Thus, it is likely that these signature proteins evolved in a common ancestor of various other Rhizobiales after the divergence of the Bradyrhizobiaceae family (Figure 1).
Bacteria that resist phagocytic destruction by amebas and are found in aerosolized water are potential agents of pneumonia (3).
pneumophila, including other Legionella spp., new a-proteobacteria belonging to the Bradyrhizobiaceae (Bosea massiliensis) family, and members of the genus Parachlamydia might be implicated in hospital-acquired pneumonia (4–6).
In strict intraamebal bacteria, we found Legionella-like amebal pathogens (7), Parachlamydia acanthamebae (8), and a giant virus resembling gram-positive cocci that we named Mimivirus (9).
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