Table 3.
Numbers of different gene variants retrieved in the LH metagenomic data sets for different functions
| Function | No. of hits |
|---|---|
| Methane | |
| F420-dependent methylene-H4 MPT reductase (EC 1.5.99.11) | 1 |
| F420-reducing hydrogenase (EC 1.12.98.1) | 30 |
| CoB-CoM heterodisulfide reductase (EC 1.8.98.1) | 2 |
| Formylmethanofuran dehydrogenase (EC 1.2.99.5) | 2 |
| Methylenetetrahydromethanopterin dehydrogenase (EC 1.5.99.9) | 2 |
| Nitrogen | |
| Nitrogenase (EC 1.18.6.1) | 2 |
| Copper-containing nitrite reductase (EC 1.7.2.1) | 45 |
| Nitric oxide reductase (EC 1.7.99.7) | 14 |
| Nitrite reductase [NAD(P)H] (EC 1.7.1.4) | 48 |
| Nitrous oxide reductase (EC 1.7.99.6) | 16 |
| Respiratory nitrate reductase (EC 1.7.99.4) | 4 |
| Sulfur | |
| Phosphoadenylyl-sulfate reductase (EC 1.8.4.8) | 29 |
| Sulfite reductase (ferredoxin) (EC 1.8.7.1) | 49 |
| Sulfate adenylyltransferase (EC 2.7.7.4) | 222 |
| Adenylyl-sulfate kinase (EC 2.7.1.25) | 172 |
| Sulfur oxidation genes (soxBDHR) | 302 |