Table 1.
List of genes and enzymes involved in the nitrogen cycle.
| No. | KEGG ID | Gene Symbol | Gene Name | EC Number | Reference |
|---|---|---|---|---|---|
| 1 | K04561 | NORB | Nitric oxide reductase subunit B | 1.7.2.5 | [125,126] |
| 2 | K15877 | CYP55 | Fungal nitric oxide reductase | 1.7.1.14 | [131,132] |
| 3 | K00376 | NOSZ | Nitrous-oxide reductase | 1.7.2.4 | [133,134,135] |
| 4 | K02586 | NIFD | Nitrogenase molybdenum-iron protein alpha chain | 1.18.6.1 | [136] |
| 5 | K22896 | VNFD | Vanadium-dependent nitrogenase alpha chain | 1.18.6.2 | [137] |
| 6 | R05186 | NIFF | Nitrogenase | 1.19.6.1 | [138] |
| 7 | K01455 | FORMAMIDASE | Formamidase | 3.5.1.49 | [139] |
| 8 | K20935 | HDH | Hydrazine dehydrogenase | 1.7.2.8 | [140] |
| 9 | K20932 | K20932 | Hydrazine synthase subunit | 1.7.2.7 | [141] |
| 10 | K01672 | CA | Carbonic anhydrase | 4.2.1.1 | [142,143] |
| 11 | K01725 | CYNS | Cyanate lyase | 4.2.1.104 | [144] |
| 12 | K00368 | NIRK | Nitrite reductase (NO-forming) | 1.7.2.1 | [145] |
| 13 | K02575 | NRT2, NARK, NRTP, NASA | MFS transporter, NNP family, nitrate/nitrite transporter | ------ | [146] |
| 14 | K15576 | NRTA, NRTB, NRTC, NASD | Nitrate/nitrite transport system substrate-binding protein | 7.3.2.4 | [147] |
| 15 | K00370 | NARG, NARZ, NXRA | Nitrate reductase/nitrite oxidoreductase, alpha subunit | 1.7.5.1 1.7.99.- |
[148] |
| 16 | K10534 | NR | Nitrate reductase (NAD(P)H) | 1.7.1.1 1.7.1.2 1.7.1.3 | [149] |
| 17 | K00367 | NARB | Ferredoxin-nitrate reductase | 1.7.7.2 | [150] |
| 18 | K02567 | NAPA | Nitrate reductase (cytochrome) | 1.9.6.1 | [130] |
| 19 | K17877 | NIT-6 | Nitrite reductase (NAD(P)H) | 1.7.1.4 | [128] |
| 20 | K00366 | NIRA | Ferredoxin-nitrite reductase | 1.7.7.1 | [151] |
| 21 | K00362 | NIRB | Nitrite reductase (NADH) large subunit | 1.7.1.15 | [152] |
| 22 | K03385 | NRFA | Nitrite reductase (cytochrome c-552) | 1.7.2.2 | [153] |
| 23 | K00459 | NCD2, NPD | Nitronate monooxygenase | 1.13.12.16 | [154] |
| 24 | K19823 | NAO | Nitroalkane oxidase | 1.7.3.1 | [155] |
| 25 | R00143 | Hydroxylamine reductase (NADH) | 1.7.1.10 | [156] | |
| 26 | K05601 | HCP | Hydroxylamine reductase | 1.7.99.1 | [157] |
| 27 | K10535 | HAO | Hydroxylamine dehydrogenase | 1.7.2.6 | [157] |
| 28 | R10230 | Hydroxylamine oxidase (cytochrome) | 1.7.3.6 | [158] | |
| 29 | K10944 | PMOA-AMOA | Methane/ammonia monooxygenase subunit A | 1.14.18.3 1.14.99.39 | [159] |
| 30 | K00926 | ARCC | Carbamate kinase | 2.7.2.2 | [160] |
| 31 | K01948 | CPS1 | Carbamoyl-phosphate synthase (ammonia) | 6.3.4.16 | [161] |
| 32 | K00260 | GUDB, ROCG | Glutamate dehydrogenase | 1.4.1.2 | [162] |
| 33 | K00261 | GLUD1_2, GDHA | Glutamate dehydrogenase (NAD(P)+) | 1.4.1.3 | [163] |
| 34 | K00262 | E1.4.1.4, GDHA | Glutamate dehydrogenase (NADP+) | 1.4.1.4 | [164] |
| 35 | K01915 | GLNA, GLUL | Glutamine synthetase | 6.3.1.2 | [165] |
| 36 | K01501 | E3.5.5.1 | Nitrilase | 3.5.5.1 | [166] |
| 37 | K00265 | GLTB | Glutamate synthase (NADPH) large chain | 1.4.1.13 | [167] |
| 38 | K00264 | GLT1 | Glutamate synthase (NADH) | 1.4.1.14 | [168] |
| 39 | K00284 | GLU, GLTS | Glutamate synthase (ferredoxin) | 1.4.7.1 | [169] |
| 40 | K00372 | NASC, NASA | Assimilatory nitrate reductase catalytic subunit | 1.7.99.- | [127] |
| 41 | K26139 | NASD, NASB | Nitrite reductase [NAD(P)H] large subunit | 1.7.1.4 | [127] |
| 42 | K15864 | NIRS | Nitrite reductase (NO-forming)/hydroxylamine reductase | 1.7.2.1 1.7.99.1 | [170,171] |
| 43 | K00531 | ANFG | Nitrogenase delta subunit | 1.18.6.1 | [120] |
| 44 | K04561 | NORB | Nitric oxide reductase subunit B | 1.7.2.5 | [125,126] |