Table 3.
Phylogenetic distribution of ECF41 σ factors
| Phyla | ECF41 proteins per phylum | Percentage of ECF41 proteins | Species with ECF41 protein | Percentage of sequenced species | Sequenced genomes/species1 |
|---|---|---|---|---|---|
| Actinobacteria | 252 | 68 | 60 | 51 | 181/118 |
| Proteobacteria | 84 | 23 | 66 | 15 | 705/414 |
| Firmicutes | 15 | 4.0 | 10 | 2.5 | 404/182 |
| Chloroflexi | 11 | 2.9 | 3 | 60 | 15/5 |
| Acidobacteria | 4 | 1.1 | 4 | 67 | 6/6 |
| Bacteriodetes | 2 | 0.5 | 2 | 4.4 | 53/45 |
| Cyanobacteria | 2 | 0.5 | 2 | 6.3 | 44/32 |
| Spirochaetes | 1 | 0.3 | 1 | 5.6 | 23/18 |
| Verrucomicrobia | 1 | 0.3 | 1 | 25 | 4/4 |
| Gemmatimonadetes | 1 | 0.3 | 1 | 100 | 1/1 |
1
Numbers of sequenced genomes and species of each phylum were extracted from the MiST2 database (Ulrich and Zhulin 2010) in October 2010.