Whole-Genome Analysis of AAA+Proteins
| Archaea | Bacteria | Eukarya | ||||||||
| Archaeoglobus | Methanobacterium | Methanococcus | Aquifex | Escherichia | Synechocystis | Bacillus | Mycobacterium | Saccharomyces | Caenorhabditis | |
| AAA+(total) | 17 | 18 | 15 | 17 | 28 | 20 | 24 | 26 | ∼50 | ∼50 |
| AAA | 4 | 3 | 2 | 1 | 1 | 5 | 2 | 3 | 21 | 19 |
| RFC/γ | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 6 | 5 |
| ClpA/B[ii] | — | 1 | — | 2 | 2 | 2 | 2 | 2 | 2 | — |
| CDC6 | 1 | 2 | — | — | — | — | — | — | 2 | 2 |
| MCM | 1 | 1 | 3 | — | — | — | — | — | 6 | 5 |
| TIP49 | 1 | — | — | — | — | — | — | — | 2 | 2 |
| ClpX/Y | — | — | — | 2 | 2 | 1 | 2 | 1 | 1 | 1 |
| Lon | — | — | — | 1 | 1 | — | 1 | — | 1 | 1 |
| MoxR-like | 1 | — | — | 1 | — | 2 | 1 | 3 | — | — |
| Mg2+chelatase | — | 1 | 1 | — | — | 2 | — | — | — | — |
| Ynv8 | — | — | — | — | 1 | — | 1 | 1 | 1 | — |
| McrB | — | 1 | — | — | 1 | — | — | — | — | — |
| MorR-like | — | — | 2 | — | 1 | — | — | — | — | — |
| DnaA | — | — | — | 1 | 2 | 1 | 1 | 1 | — | — |
| RuvB | — | — | — | — | 1 | 1 | 1 | 1 | — | — |
| NtrC | — | — | — | 4 | 11 | — | 5 | — | — | — |
| SpoVJ | — | — | — | — | — | — | 1 | 1 | — | — |
| YifB | — | — | — | 1 | 1 | 1 | 1 | — | — | — |
| YkxC | — | — | — | — | — | — | 2 | — | — | — |
| La-like | 1 | 2 | 1 | — | — | — | — | — | — | — |
| Mta-like | — | 2 | — | — | — | — | — | — | — | — |
| Dynein | — | — | — | — | — | — | — | — | 1 | 2 |
| AGF1 | — | — | — | — | — | — | — | — | 1 | 1 |
[i] Numbers of proteins in each family per genome are indicated. Families are grouped according to their occurrence among the three divisions of life.
[ii] Appears to have spread to archaeans and eukaryotes by horizontal transfer from bacteria.