Fig. 5.

Bayesian inference of γ-Proteobacteria DEAD-box proteins. Complete alignment of 773 amino acid sequences from γ-Proteobacteria, which correspond to the DEAD and Helicase_C domains without Gblocks filtering used in the Bayesian inference (see Fig. 1 and “Materials and methods”). DEAD-box proteins from E. coli are localized as reference sequences across the phylogram. Note the defined group containing a DbpA-RBD that is shown with a red box around the perimeter. Noticeable gene expansion occurred in the Shewanella and Vibrio genera. From the topology, we inferred that the γ-Proteobacteria ancestor possessed both DbpA-RBD-containing and DbpA-RBD-lacking DEAD-box proteins. Genera are depicted with different colors and only posterior probability with values of 0.60 and above are shown. Three DbpA-RBD-lacking branches and two DpbA-RBD-containing branches are indicated