TABLE 1.
Genes for Orc1/Cdc5, MCM, and PCNA in sequenced archaeal genomesa
| Organism | No. of genes
|
||
|---|---|---|---|
| Orc1/Cdc6 | MCM | PCNA | |
| Aeropyrum pernix | 2 | 1 | 3 |
| Archaeoglobus fulgidus | 2 | 1 | 1 |
| Cenarchaeum symbiosum | 1 | 1 | 1 |
| Haloarcula marismortui | 17 | 3 | 1 |
| Halobacterium sp. strain NRC-1 | 9 | 1 | 1 |
| Ignicoccussp. strain Kin4-1 | 2 | 1 | 3 |
| Methanobacterium thermautotrophicum | 2 | 1 | 1 |
| Methanococcoides burtonii | 2 | 1 | 1 |
| Methanococcus jannaschii | 0 | 4 | 1 |
| Methanococcus maripaludis | 0 | 4 | 1 |
| Methanopyrus kandleri | 0 | 2 | 1 |
| Methanosarcina acetivorans | 2 | 2 | 1 |
| Methanosarcina barkeri | 3 | 1 | 1 |
| Methanosarcina mazei | 2 | 1 | 1 |
| Methanospirillum hungatei | 2 | 1 | 1 |
| Methanosphaera stadtmanae | 2 | 1 | 1 |
| Nanoarchaeum equitans | 1 | 1 | 1 |
| Natronomonas pharaonis | 5 | 2 | 1 |
| Picrophilus torridus | 1 | 1 | 1 |
| Pyrobaculum aerophilum | 1 | 1 | 2 |
| Pyrococcus abyssi | 1 | 1 | 1 |
| Pyrococcus furiosus | 1 | 1 | 1 |
| Pyrococcus horikoshii | 1 | 1 | 1 |
| Sulfolobus solfataricus | 3 | 1 | 3 |
| Sulfolobus acidocaldarius | 3 | 1 | 3 |
| Sulfolobus tokodaii | 3 | 1 | 3 |
| Thermococcus kodakarensis | 1 | 3 | 2 |
| Thermoplasma acidophilum | 2 | 1 | 1 |
| Thermoplasma volcanium | 2 | 1 | 1 |
a
Crenarchaeal species and their values are indicated in bold. Genes were identified by Blast searching using the server at http://www-archbac.u-psud.fr/projects/sulfolobus/Blast_Search.html.