Table 1.
Coverage of unicellular organisms in COGs
| Species | Number of annotated proteins | Number (and percentage) of proteins in COGs | Number of COGs that include the given species |
| Bacteria | |||
| Proteobacteria (Gram-negative) | |||
| Agrobacterium tumefaciens | 5299 | 4398 (83%) | 1978 |
| Brucella melitensis | 3198 | 2678 (84%) | 1654 |
| Caulobacter crescentus | 3737 | 2958 (79%) | 1734 |
| Mesorhizobium loti | 7275 | 5653 (78%) | 2175 |
| Sinorhizobium meliloti | 6205 | 5207 (84%) | 2084 |
| Rickettsia conorii | 1374 | 891 (65%) | 733 |
| Rickettsia prowazekii | 835 | 727 (87%) | 647 |
| Buchnera sp | 574 | 567 (99%) | 559 |
| Escherichia coli K12 | 4279 | 3623 (85%) | 2131 |
| Escherichia coli O157:H7 | 5324 | 4050 (76%) | 2190 |
| Escherichia coli O157:H7 EDL933 | 5361 | 4023 (75%) | 2200 |
| Salmonella typhi | 4553 | 3724 (82%) | 2167 |
| Yersinia pestis | 4083 | 3341 (82%) | 1993 |
| Haemophilus influenzae | 1714 | 1597 (93%) | 1317 |
| Pasteurella multocida | 2015 | 1829 (91%) | 1455 |
| Vibrio cholerae | 3463 | 2929 (85%) | 1918 |
| Pseudomonas aeruginosa | 5567 | 4660 (84%) | 2243 |
| Xylella fastidiosa | 2832 | 1740 (61%) | 1310 |
| Neisseria meningitidis MC58 | 2079 | 1561 (75%) | 1255 |
| Neisseria meningitides Z2491 | 2065 | 1573 (76%) | 1260 |
| Ralstonia solanaraceum | 5116 | 3931 (77%) | 2018 |
| Campylobacter jejuni | 1634 | 1328 (81%) | 1093 |
| Helicobacter pylori 26695 | 1576 | 1127 (72%) | 920 |
| Helicobacter pylori J99 | 1491 | 1106 (74%) | 921 |
| Low-GC Gram-positive bacteria | |||
| Bacillus halodurans | 4066 | 3149 (77%) | 1744 |
| Bacillus subtilis | 4112 | 3125 (76%) | 1771 |
| Clostridium acetobutilicum | 3848 | 2879 (75%) | 1549 |
| Lactococcus lactis | 2267 | 1798 (79%) | 1208 |
| Listeria innocua | 3043 | 2428 (80%) | 1522 |
| Mycoplasma genitalium | 484 | 385 (80%) | 362 |
| Mycoplasma pneumoniae | 689 | 431 (63%) | 383 |
| Mycoplasma pulmonis | 782 | 514 (66%) | 426 |
| Ureaplasma urealyticum | 614 | 418 (68%) | 378 |
| Staphylococcus aureus | 2625 | 2071 (79%) | 1419 |
| Streptococcus pneumoniae | 2094 | 1586 (76%) | 1105 |
| Streptococcus pyogenes | 1697 | 1356 (80%) | 1030 |
| Actinobacteria | |||
| Corinebacterium glutamicum | 3040 | 2162 (71%) | 1339 |
| Mycobacterium tuberculosis H37Rv | 3927 | 2843 (72%) | 1450 |
| Mycobacterium tuberculosis CDC1551 | 4187 | 2756 (66%) | 1434 |
| Mycobacterium leprae | 1605 | 1180 (74%) | 927 |
| Hyperthermophilic bacteria | |||
| Aquifex aeolicus | 1560 | 1349 (86%) | 1088 |
| Thermotoga maritima | 1858 | 1565 (84%) | 1167 |
| Cyanobacteria | |||
| Synechocystis sp. | 3167 | 2346 (74%) | 1427 |
| Nostoc sp. | 6129 | 3832 (63%) | 1673 |
| Other bacteria | |||
| Borrelia burgdorferi | 1638 | 701 (43%) | 577 |
| Treponema pallidum | 1036 | 737 (71%) | 639 |
| Chlamydia trachomatis | 895 | 644 (72%) | 587 |
| Chlamydophila pneumoniae | 1054 | 667 (63%) | 603 |
| Deinococcus radiodurans | 3182 | 2322 (73%) | 1495 |
| Fusobacterium nucleatum | 2067 | 1556 (75%) | 1143 |
| Archaea | |||
| Euryarchaeota | |||
| Archaeoglobus fulgidus | 2420 | 1953 (81%) | 1244 |
| Methanocaldococcus jannaschii | 1758 | 1448 (82%) | 1117 |
| Methanothermobacter autotrophicus | 1873 | 1500 (80%) | 1123 |
| Methanopyrus kandleri | 1691 | 1253 (74%) | 1022 |
| Methanosarcina acetivorans | 4540 | 3142 (69%) | 1462 |
| Pyrococcus abyssi | 1769 | 1506 (85%) | 1065 |
| Pyrococcus horikoshii | 1801 | 1425 (79%) | 1019 |
| Thermoplasma acidophilum | 1482 | 1261 (85%) | 890 |
| Thermoplasma volcanium | 1499 | 1277 (85%) | 900 |
| Halobacterium sp. | 2622 | 1809 (69%) | 1109 |
| Crenarchaeota | |||
| Aeropyrum pernix | 1840 | 1236 (67%) | 947 |
| Pyrobaculum aerophylum | 2605 | 1529 (59%) | 1015 |
| Sulfolobus solfataricus | 2977 | 2207 (74%) | 1084 |
| Eukaryota | |||
| Saccharomyces cerevisiae | 6338 | 3012 (48%) | 1299 |
| Schizosaccharomyces pombe | 4979 | 2774 (56%) | 1282 |
| Encephalitozoon cuniculi | 1996 | 1105 (55%) | 696 |