Figure 2

Phylogeny of bacterial GluRS. Maximum Likelihood based rooted phylogenetic tree of bacterial GluRS sequences (See Methods). The functional status (see main text) of each GluRS sequences is indicated by a coloring scheme and clades are annotated by abbreviated phylum or class codes (see Table 1). Outliers (three-letter codes given Additional files 1 and 2) for panel are marked by numbers (1: NDE (ht); 2: TID (ht); 3:FMA (fi); 4: AOE (fi); 5:CTH (fi); 6: HOH (δ); 7: SSM (sp); 8: DPR (δ); 9: DPS(δ); 10: DAK (δ); 11: TGR1 (γ)). The canonical proteobacterial group is highlighted along with two groups of outlier γ- and α- proteobacterial GluRS (marked as γ* and α* and listed in Additional file 3). Branch support values < 0.7, using aLRT statistics, are indicated.