Table 6 Occurrence of B12 biosynthetic pathways and B12-dependent enzymes in archaea
From: Comparative genomic analyses of nickel, cobalt and vitamin B12 utilization
Phylum | Total organisms | B12-utilizing organisms | B12 biosynthesis pathway | B12-dependent isomerase | B12-dependent methyltransferase | |||
|---|---|---|---|---|---|---|---|---|
| Â | Â | Â | Â | MCM/MeaA/ICM* | GM | RNR II | Other MTs | MtrA |
Nanoarchaeota | 1 | - | - | - | - | - | - | - |
Crenarchaeota/Thermoproteales | 6 | 6 | 2 | - | - | 5 | 1 | - |
Crenarchaeota/Desulfurococcales | 4 | 3 | - | 1 | - | 2 | 1 | - |
Crenarchaeota/Sulfolobales | 4 | 4 | 4 | 4 | - | 4 | - | - |
Euryarchaeota/Thermoplasmales | 4 | 4 | 4 | 4 | - | 4 | - | - |
Euryarchaeota/Archaeoglobales | 1 | 1 | 1 | 1 | - | 1 | 1 | - |
Euryarchaeota/Halobacteriales | 5 | 5 | 5 | 5 | 2 | 5 | - | - |
Euryarchaeota/Methanosarcinales | 5 | 5 | 5 | - | - | 4 | 4 | 5 |
Euryarchaeota/Thermococcales | 4 | 4 | - | 4 | - | 4 | - | - |
Euryarchaeota/Methanococcales | 5 | 5 | 5 | - | - | - | 3 | 5 |
Euryarchaeota/Methanopyrales | 1 | 1 | 1 | - | - | - | - | 1 |
Euryarchaeota/Methanobacteriales | 3 | 3 | 3 | - | - | 1 | 3 | 3 |
Euryarchaeota/Methanomicrobiales | 4 | 4 | 4 | - | - | 3 | 2 | 4 |
Total | 47 | 45 | 34 | 19 | 2 | 33 | 15 | 18 |