Table 2. Summary of metabolic capabilities of snottite microorganisms based on metagenomic data.
| Acidithiobacillus | G-plasma | Acidimicrobium | |
|---|---|---|---|
| CO2 fixation | Yes | No evidence | No evidence |
| Reductive pentose–phosphate pathway | Yes | — | — |
| S-oxidation | Yes | No evidence | Probable |
| SQR | Yes | — | Yes |
| sox system | Yes (soxAB, X, YZ) | — | No evidence |
| soxCD | No evidence | — | — |
| TQO | Yes | — | No evidence |
| TTH | Yes | — | No evidence |
| SOR | No evidence | — | No evidence |
| fccC | No evidence | — | No evidence |
| dsrAB | No evidence | — | No evidence |
| N-metabolism | |||
| N2-fixation (nifH, D, K) | No evidence | No evidence | No evidence |
| Ammonia assimilation | Yes | Yes | Yes |
| Ammonia permease | Yes | Yes | No evidence |
| Glutamine synthetase | Yes | Yes | Yes |
| Nitrate assimilation | Yes | No evidence | Probable |
Abbreviations: dsrAB, dissimilatory sulfite reductase ; fccC, flavocytochrome C ; SOR, sulfur oxygenase reductase; THH, tetrathionate hydrolase; SQR, sulfide–quinone reductase; TQO, thiosulfate:quinol reductase.