| [A] Ignicoccus hospitalis (strain KIN4/I / DSM 18386 / JCM 14125) | IGNH401337 | GUAAA_IGNH4 | Glutamine amidotransferase class-I |
| [A] Metallosphaera sedula (strain ATCC 51363 / DSM 5348) | METS501345 | A4YGH0 | GMP synthase, small subunit |
| [A] Sulfolobus acidocaldarius | SULAC00512 | GUAAA_SULAC | seems to be a short archaeal (about 190 aa) version of the bacterial protein (510 aa); Pyrobaculum aerophilum has the long gene glutamine amidotransferase class-I domain |
| [A] Sulfolobus islandicus (strain L.S.2.15 / Lassen #1) | SULIL00270 | C3MKC6 | |
| [A] Sulfolobus islandicus (strain M.14.25 / Kamchatka #1) | SULIM00238 | C3MU96 | |
| [A] Sulfolobus islandicus (strain M.16.27) | SULIA00239 | C3N184 | |
| [A] Sulfolobus islandicus (strain Y.G.57.14 / Yellowstone #1) | SULIY00242 | C3N974 | |
| [A] Sulfolobus islandicus (strain Y.N.15.51 / Yellowstone #2) | SULIN02503 | C3NMU2 | |
| [A] Sulfolobus solfataricus | SULSO02183 | GUAAA_SULSO | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Sulfolobus tokodaii | SULTO00630 | GUAAA_SULTO | hypothetical GMP synthase |
| [A] Caldivirga maquilingensis (strain DSMZ 13496 / IC-167) | CALMQ01175 | A8ME24 | Glutamine amidotransferase class-I |
| [A] Archaeoglobus fulgidus | ARCFU01295 | GUAAA_ARCFU | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Haloarcula marismortui | HALMA01514 | GUAAA_HALMA | glutamine-hydrolyzing GMP synthase |
| [A] Halobacterium salinarium | HALSA00188 | GUAAA_HALSA | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Halobacterium salinarum (strain ATCC 29341 / DSM 671 / R1) | HALS300198 | B0R2X4 | GMP synthase (Glutamine-hydrolyzing) subunit A |
| [A] Haloquadratum walsbyi (strain DSM 16790) | HALWD00295 | GUAAA_HALWD | GMP synthase (glutamine-hydrolyzing), subunit A |
| [A] Halorubrum lacusprofundi (strain ATCC 49239 / DSM 5036 / JCM 8891 / ACAM 34) | HALLT00563 | B9LTN9 | GMP synthase, small subunit |
| [A] Natronomonas pharaonis (strain DSM 2160 / ATCC 35678) | NATPD00308 | GUAAA_NATPD | GMP synthase (glutamine-hydrolyzing) (EC 6.3.5.2), subunit A |
| [A] Methanobrevibacter smithii (strain PS / ATCC 35061 / DSM 861) | METS300339 | GUAAA_METS3 | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Methanosphaera stadtmanae (strain DSM 3091) | METST01264 | GUAAA_METST | GMP synthase [glutamine hydrolyzing], subunit A COG0518, pfam00117 |
| [A] Methanobacterium thermoautotrophicum | METTH00704 | GUAAA_METTH | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Methanocaldococcus jannaschii | METJA01619 | GUAAA_METJA | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Methanococcus aeolicus (strain Nankai-3 / ATCC BAA-1280) | META300858 | GUAAA_META3 | GMP synthase, small subunit |
| [A] Methanococcus maripaludis | METMP01445 | GUAAA_METMP | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Methanococcus maripaludis (strain C5 / ATCC BAA-1333) | METM500133 | GUAAA_METM5 | GMP synthase, small subunit |
| [A] Methanococcus maripaludis (strain C6 / ATCC BAA-1332) | METM601214 | GUAAA_METM6 | GMP synthase, small subunit |
| [A] Methanococcus maripaludis (strain C7 / ATCC BAA-1331) | METM700683 | GUAAA_METM7 | GMP synthase, small subunit |
| [A] Methanococcus vannielii (strain SB / ATCC 35089 / DSM 1224) | METVS00744 | GUAAA_METVS | GMP synthase, small subunit |
| [A] Methanoregula boonei (strain 6A8) | METB600698 | GUAAA_METB6 | GMP synthase, small subunit |
| [A] Methanoculleus marisnigri (strain ATCC 35101 / DSM 1498 / JR1) | METMJ00721 | GUAAA_METMJ | GMP synthase, small subunit |
| [A] Methanosphaerula palustris (strain ATCC BAA-1556 / DSM 19958 / E1-9c) | METPE01464 | B8GIP7 | GMP synthase, small subunit |
| [A] Methanospirillum hungatei (strain JF-1 / DSM 864) | METHJ01500 | GUAAA_METHJ | GMP synthase-like |
| [A] Methanosaeta thermophila (strain DSM 6194 / PT) | METTP00160 | GUAAA_METTP | GMP synthase, small subunit TIGRFAM: GMP synthase, small subunit PFAM: glutamine amidotransferase class-I KEGG: mba:Mbar_A0919 GMP synthase (glutamine-hydrolyzing) |
| [A] Methanococcoides burtonii (strain DSM 6242) | METBU01832 | GUAAA_METBU | GMP synthase |
| [A] Methanosarcina acetivorans | METAC04398 | GUAAA_METAC | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Methanosarcina barkeri (strain Fusaro / DSM 804) | METBF00889 | GUAAA_METBF | GMP synthase (glutamine-hydrolyzing) |
| [A] Methanosarcina mazei | METMA01249 | GUAAA_METMA | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Methanopyrus kandleri | METKA00551 | GUAAA_METKA | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Pyrococcus abyssi | PYRAB00802 | GUAAA_PYRAB | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Pyrococcus furiosus | PYRFU01503 | GUAAA_PYRFU | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Pyrococcus horikoshii | PYRHO01396 | GUAAA_PYRHO | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Thermococcus kodakaraensis | PYRKO00190 | GUAAA_PYRKO | GMP synthase, glutamine amidotransferase component |
| [A] Thermococcus onnurineus (strain NA1) | THEON01902 | B6YVR1 | GMP synthase, glutamine amidotransferase component |
| [A] Picrophilus torridus | PICTO01342 | GUAAA_PICTO | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Thermoplasma acidophilum | THEAC00925 | GUAAA_THEAC | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Thermoplasma volcanium | THEVO01111 | GUAAA_THEVO | GMP synthase [glutamine-hydrolyzing] subunit A |
| [A] Uncultured methanogenic archaeon RC-I | UNCMA02325 | GUAAA_UNCMA | GMP synthase, glutamine-hydrolyzing |