Table 1.
Genomic features of marine Thaumarchaeota with complete genomesa.
| Organisma | N. adriaticus NF5 | N. piranensis D3C | N. maritimus SCM1 | N. koreensis AR1 | N. sediminis AR2 | C. symbiosum A | N. brevis CN25 |
|---|---|---|---|---|---|---|---|
| Habitat | Surface water | Surface water | Aquarium gravel | Arctic sediment | Arctic sediment | Sponge symbiont | Open ocean |
| Genome size (Mb) | 1.80 | 1.71 | 1.65 | 1.64 | 1.69 | 2.05 | 1.23 |
| G+C content (%) | 33.4 | 33.8 | 34.2 | 34.2 | 33.6 | 57.4 | 33.2 |
| CDSb | 2,184 | 2,161 | 1,796 | 1,890 | 1,974 | 2,014 | 1,445 |
| 16S-23S rRNA genes | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Number of tRNAsc | 43 (45) | 43 (44) | 44 | 38 | 37 | 45 | 42 |
| Nitrite reductase genes (nirK) | 2 | 1 | 2 | 1 | 1 | 0 | 1 |
| Urease | − | + | − | − | + | + | − |
| Flagellad | + | − | − | − | − | − | − |
| Photolyased | + | + | − | − | − | − | + |
a
“Ca. Nitrosopumilus maritimus” SCM1 (CP000866), “Ca. Nitrosopumilus koreensis” AR1 (CP003842), “Ca. Nitrosopumilus sediminis” AR2 (CP003843), “Ca. Cenarchaeum symbiosum” A (DP000238), “Ca. Nitrosopelagicus brevis” CN25 (CP007026)
b
Coding DNA sequences
c
Number in brackets includes putative tRNAs. It should be noted that the number of tRNAs might be underrepresented as archaeal tRNAs sometimes possess non-canonical introns.
d
Present in the incomplete genomes of “Ca. Nitrosoarchaeum limnia” strains SFB1 and BG20.