Table 1.
Biogeochemical cycling genes assessed in biocrusts.
| Protein name | SEED annotation | Biogeochemical role | Number of contigs |
|---|---|---|---|
| Nitrogen cycle | |||
| Nitrogenase | Nitrogenase (molybdenum iron) alpha chain (EC:1.18.6.1) | Nitrogen fixation | 2 |
| Nitrate reductase | Assimilatory nitrate reductase large subunit (EC:1.7.99.4) | Ammonification | 24 |
| Nitrite reductase | Nitrite reductase [NAD(P)H] large subunit (EC:1.7.1.4) (assimilatory) | Ammonification | 20 |
| Cytochrome c nitrite reductase | Cytochrome c nitrite reductase small subunit NrfH | Ammonification | 1 |
| Nitrite reductase | Copper containing nitrite reductase (EC:1.7.2.1) | Denitrification | 15 |
| Nitric oxide | Nitric oxide reductase (EC:1.7.99.7) quinol dependent | Denitrification | 5 |
| Nitrous oxide | Nitrous oxide reductase (EC:1.7.99.6) | Denitrification | 5 |
| Carbon cycle | |||
| RuBisCo | Ribulose bisphosphate carboxylase large chain (EC:4.1.1.39) | Carbon fixation | 96 |
| Malate dehydrogenase | Malate dehydrogenase (EC:1.1.1.37) | TCA cycle | 42 |
| Pyruvate kinase | Pyruvate kinase (EC:2.7.1.40) | Entner–Doudoroff pathway | 43 |
| Lactate dehydrogenase | D lactate dehydrogenase (EC:1.1.1.28) | Fermentations | 14 |
| Methane monooxygenase | Methane monooxygenase component A beta chain (EC:1.14.13.25) | Methanotrophy | 13 |