Table 2 Combinations of the three RNase H genes found in the archaeal and bacterial genomes.
From: Evolution of ribonuclease H genes in prokaryotes to avoid inheritance of redundant genes
Kingdom | Subdivision | No. of species | Classification of RNase H combination | ||||||
|---|---|---|---|---|---|---|---|---|---|
Group A | Group B | Group C | Group D | Group E | Group F | Group G | |||
Archaea | Crenarchaeota | 5 | 0 | 3 | 0 | 0 | 0 | 2 | 0 |
| Â | Euryarchaeota | 21 | 0 | 6 | 1 | 0 | 0 | 14 | 0 |
| Â | Nanoarchaeota | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 |
| Â | Total | 27 | 0 | 9 | 1 | 0 | 0 | 17 | 0 |
Bacteria | Acidobacteria | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| Â | Actinobacteria | 20 | 0 | 18 | 1 | 0 | 1 | 0 | 0 |
| Â | Aquificae | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 |
| Â | Bacteroidetes | 4 | 0 | 4 | 0 | 0 | 0 | 0 | 0 |
| Â | Chlamydiae | 7 | 0 | 0 | 7 | 0 | 0 | 0 | 0 |
| Â | Chlorobi | 3 | 0 | 3 | 0 | 0 | 0 | 0 | 0 |
| Â | Chloroflexi | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 |
| Â | Cyanobacteria | 8 | 0 | 8 | 0 | 0 | 0 | 0 | 0 |
| Â | Deinococcus-Thermus | 3 | 0 | 3 | 0 | 0 | 0 | 0 | 0 |
| Â | Firmicutes | 49 | 15 | 18 | 7 | 0 | 0 | 0 | 9 |
| Â | Fusobacteria | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| Â | Planctomycetes | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 |
| Â | Alphaproteobacteria | 38 | 0 | 38 | 0 | 0 | 0 | 0 | 0 |
| Â | Betaproteobacteria | 23 | 0 | 23 | 0 | 0 | 0 | 0 | 0 |
| Â | Deltaproteobacteria | 11 | 0 | 11 | 0 | 0 | 0 | 0 | 0 |
| Â | Epsilonproteobacteria | 5 | 0 | 5 | 0 | 0 | 0 | 0 | 0 |
| Â | Gammaproteobacteria | 52 | 0 | 49 | 0 | 0 | 3 | 0 | 0 |
| Â | Spirochaetes | 5 | 0 | 4 | 0 | 0 | 1 | 0 | 0 |
| Â | Thermotogae | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 |
| Â | Total | 235 | 15 | 189 | 16 | 0 | 6 | 0 | 9 |