| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Agrobacterium fabrum C58 | Atu1037 | | nitrogen fixation regulatory protein | insig. | 100 | 100 |
| o | Rhizobium sp. OAE497 | ABIE40_RS06085 | | Crp/Fnr family transcriptional regulator | insig. | 70 | 100 |
| o | Sinorhizobium meliloti 1021 | SMc01954 | | transcriptional regulator | insig. | 67 | 93 |
| o | Rhodospirillum rubrum S1H | Rru_A1787 | | Cyclic nucleotide-binding domain (cNMP-BD) protein (NCBI) | insig. | 49 | 94 |
| o | Phaeobacter inhibens DSM 17395 | PGA1_c19590 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | insig. | 48 | 96 |
| o | Dinoroseobacter shibae DFL-12 | Dshi_3844 | | cyclic nucleotide-binding protein (RefSeq) | sig. | 46 | 96 |
| o | Variovorax sp. SCN45 | GFF5168 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | insig. | 45 | 98 |
| o | Acidovorax sp. GW101-3H11 | Ac3H11_3065 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | insig. | 43 | 100 |
| o | Variovorax sp. OAS795 | ABID97_RS06620 | | Crp/Fnr family transcriptional regulator | insig. | 45 | 100 |
| o | Bosea sp. OAE506 | ABIE41_RS04120 | | Crp/Fnr family transcriptional regulator | insig. | 42 | 98 |
| | Azospirillum sp. SherDot2 | MPMX19_05769 | | hypothetical protein | insig. | 44 | 69 |
| | Phaeobacter inhibens DSM 17395 | PGA1_c17670 | | transcriptional regulator, crp family | sig. | 32 | 89 |
| o | Brevundimonas sp. GW460-12-10-14-LB2 | A4249_RS05130 | | Crp/Fnr family transcriptional regulator | insig. | 33 | 86 |
| | Brevundimonas sp. GW460-12-10-14-LB2 | A4249_RS05295 | | Crp/Fnr family transcriptional regulator | insig. | 36 | 78 |
| | Rhodopseudomonas palustris CGA009 | TX73_010705 | | Crp/Fnr family transcriptional regulator | insig. | 31 | 80 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_4078 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | insig. | 31 | 74 |
| | Azospirillum brasilense Sp245 | AZOBR_RS01145 | | Crp/Fnr family transcriptional regulator | cofit | 29 | 82 |
| | Azospirillum sp. SherDot2 | MPMX19_00212 | | Nitrogen fixation regulation protein FixK | cofit | 27 | 86 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_3841 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | insig. | 29 | 89 |
| | Rhodospirillum rubrum S1H | Rru_A3322 | | Transcriptional Regulator, Crp/Fnr family (NCBI) | cofit | 29 | 90 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS22105 | | transcriptional regulator | insig. | 27 | 90 |
| | Brevundimonas sp. GW460-12-10-14-LB2 | A4249_RS13080 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 92 |
| o | Sphingobium sp. HT1-2 | GFF496 | | hypothetical protein | insig. | 26 | 87 |
| | Bosea sp. OAE506 | ABIE41_RS01080 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 77 |
| | Bosea sp. OAE506 | ABIE41_RS01295 | | Crp/Fnr family transcriptional regulator | insig. | 29 | 77 |
| | Brevundimonas sp. GW460-12-10-14-LB2 | A4249_RS05290 | | Crp/Fnr family transcriptional regulator | insig. | 30 | 75 |
| | Azospirillum brasilense Sp245 | AZOBR_RS23090 | | Crp/Fnr family transcription regulator | insig. | 32 | 74 |
| | Rhodopseudomonas palustris CGA009 | TX73_021940 | | helix-turn-helix domain-containing protein | no data | 30 | 71 |
| | Bosea sp. OAE506 | ABIE41_RS05275 | | Crp/Fnr family transcriptional regulator | insig. | 31 | 78 |
| | Xanthobacter sp. DMC5 | GFF3783 | | Nitrogen fixation regulation protein FixK | insig. | 36 | 64 |
| | Caulobacter crescentus NA1000 | CCNA_00789 | | hypoxia transcriptional regulator FixK | strong | 33 | 67 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_00789 | | hypoxia transcriptional regulator FixK | cofit | 33 | 67 |
| | Dinoroseobacter shibae DFL-12 | Dshi_0660 | | transcriptional regulator, Crp/Fnr family (RefSeq) | insig. | 28 | 82 |
| | Rhodopseudomonas palustris CGA009 | TX73_017160 | | Crp/Fnr family transcriptional regulator | insig. | 30 | 77 |
| | Phaeobacter inhibens DSM 17395 | PGA1_c30140 | | transcriptional activator protein FnrL | insig. | 27 | 94 |
| | Sinorhizobium meliloti 1021 | SMa1225 | | transcriptional regulator FixK | no data | 32 | 70 |
| | Sinorhizobium meliloti 1021 | SMa0762 | | transcriptional regulator FixK | no data | 32 | 70 |
| | Sinorhizobium meliloti 1021 | SM_b21079 | | transcriptional regulator | insig. | 29 | 76 |
| | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.2952.1 | | transcriptional regulator, Crp/Fnr family | sig. | 29 | 96 |
| | Azospirillum brasilense Sp245 | AZOBR_RS17340 | | hypothetical protein | insig. | 30 | 68 |
| | Bosea sp. OAE506 | ABIE41_RS15480 | | helix-turn-helix domain-containing protein | insig. | 27 | 78 |
| | Rhodopseudomonas palustris CGA009 | TX73_022020 | | helix-turn-helix domain-containing protein | no data | 29 | 67 |
| | Sphingobium sp. HT1-2 | GFF4341 | | hypothetical protein | insig. | 28 | 90 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_3843 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | insig. | 29 | 76 |
| | Azospirillum sp. SherDot2 | MPMX19_03014 | | Transcriptional activatory protein AadR | insig. | 28 | 77 |
| | Sphingobium sp. HT1-2 | GFF3049 | | Transcriptional regulator, Crp/Fnr family | cofit | 27 | 82 |
| | Ralstonia solanacearum GMI1000 | RS_RS06430 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 26 | 90 |
| | Bosea sp. OAE506 | ABIE41_RS00860 | | Crp/Fnr family transcriptional regulator | insig. | 28 | 71 |
| | Bosea sp. OAE506 | ABIE41_RS06880 | | Crp/Fnr family transcriptional regulator | insig. | 30 | 80 |
| | Rhodopseudomonas palustris CGA009 | TX73_005105 | | Crp/Fnr family transcriptional regulator | insig. | 27 | 66 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS15650 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 25 | 90 |
| | Ralstonia solanacearum UW163 | UW163_RS13110 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 25 | 90 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS12875 | | transcriptional regulator | insig. | 24 | 90 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS17705 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 25 | 90 |
| | Pseudomonas stutzeri RCH2 | Psest_2538 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | strong | 23 | 92 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_975 | | transcriptional regulator, Crp/Fnr family | no data | 23 | 92 |
| | Rhizobium sp. OAE497 | ABIE40_RS14315 | | Crp/Fnr family transcriptional regulator | insig. | 26 | 70 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF4142 | | transcriptional regulator, Crp/Fnr family | insig. | 25 | 82 |
| | Escherichia coli ECRC98 | JDDGAC_04785 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 23 | 90 |
| | Dinoroseobacter shibae DFL-12 | Dshi_0447 | | transcriptional regulator, Crp/Fnr family (RefSeq) | insig. | 28 | 69 |
| | Escherichia fergusonii Becca | EFB2_02593 | | Fumarate and nitrate reduction regulatory protein | sig. | 23 | 90 |
| | Escherichia coli ECOR27 | NOLOHH_19940 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 23 | 90 |
| | Escherichia coli ECOR38 | HEPCGN_25925 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 23 | 90 |
| | Escherichia coli ECRC100 | OKFHMN_02240 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 23 | 90 |
| | Escherichia coli ECRC102 | NIAGMN_26410 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 23 | 90 |
| | Escherichia coli ECRC62 | BNILDI_18090 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 23 | 90 |
| | Escherichia coli ECRC99 | KEDOAH_26530 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | no data | 23 | 90 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_02348 | | Fumarate and nitrate reduction regulatory protein | insig. | 23 | 90 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS08005 | | fumarate/nitrate reduction transcriptional regulator Fnr | insig. | 23 | 90 |
| | Escherichia coli BW25113 | b1334 | fnr | DNA-binding transcriptional dual regulator, global regulator of anaerobic growth (NCBI) | strong | 23 | 90 |
| | Pseudomonas sp. S08-1 | OH686_02245 | | Fumarate and nitrate reduction regulatory protein | insig. | 25 | 90 |
| | Erwinia tracheiphila HP pepo 2.2 | IJEDHG_23150 | crp | transcriptional regulator FNR | insig. | 23 | 95 |
| | Erwinia tracheiphila SCR3 | LU632_RS11420 | | FNR family transcription factor | insig. | 23 | 95 |
| | Escherichia coli ECRC101 | MCAODC_16030 | fnr | fumarate/nitrate reduction transcriptional regulator Fnr | sig. | 23 | 90 |
| | Pseudomonas sp. BP01 | JOY50_RS00125 | fnrA | Crp/Fnr family transcriptional regulator FnrA | insig. | 22 | 90 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2656 | | Fumarate and nitrate reduction regulatory protein | sig. | 23 | 90 |
| | Dickeya dianthicola 67-19 | HGI48_RS10900 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 23 | 90 |
| | Dickeya dianthicola ME23 | DZA65_RS11360 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 23 | 90 |
| | Pseudomonas sp. SVBP6 | COO64_RS18640 | fnrA | Crp/Fnr family transcriptional regulator FnrA | insig. | 22 | 90 |
| | Sinorhizobium meliloti 1021 | SMa1141 | | FNR/CRP family transcriptional regulator | insig. | 28 | 78 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_1540 | | cAMP-binding proteins - catabolite gene activator and regulatory subunit of cAMP-dependent protein kinases | cofit | 23 | 90 |
| | Enterobacter sp. TBS_079 | MPMX20_02035 | | Fumarate and nitrate reduction regulatory protein | strong | 23 | 90 |
| | Klebsiella michiganensis M5al | BWI76_RS16185 | | transcriptional regulator FNR | no data | 23 | 90 |
| | Pseudomonas putida KT2440 | PP_4265 | | DNA-binding transcriptional dual regulator | strong | 22 | 90 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS11180 | | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 26 | 78 |
| | Cellulophaga baltica 18 | M666_RS04590 | | Crp/Fnr family transcriptional regulator | insig. | 26 | 79 |
| | Agrobacterium fabrum C58 | Atu1602 | | transcriptional activator, Crp family | strong | 26 | 70 |
| | Dickeya dadantii 3937 | DDA3937_RS10950 | | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 23 | 90 |
| | Shewanella amazonensis SB2B | Sama_1799 | | fumarate/nitrate reduction transcriptional regulator (RefSeq) | sig. | 23 | 91 |
| | Pectobacterium carotovorum WPP14 | HER17_RS10525 | | fumarate/nitrate reduction transcriptional regulator Fnr | cofit | 23 | 90 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_21005 | | fumarate/nitrate reduction transcriptional regulator Fnr | strong | 23 | 90 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_07375 | | transcriptional regulator Anr | strong | 22 | 91 |
| | Methylophilus sp. DMC18 | GFF1089 | | Transcriptional activator protein Anr | insig. | 22 | 90 |
| | Erwinia amylovora T8 | OLJFJH_13925 | | transcriptional regulator FNR | sig. | 21 | 95 |
| | Castellaniella sp019104865 MT123 | ABCV34_RS06835 | | helix-turn-helix domain-containing protein | strong | 21 | 96 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS16980 | | Crp/Fnr family transcriptional regulator | cofit | 26 | 90 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_3867 | | Fumarate and nitrate reduction regulatory protein | no data | 22 | 96 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_3425 | | Cyclic nucleotide-binding:Bacterial regulatory protein, Crp | insig. | 21 | 94 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_3425 | | Cyclic nucleotide-binding:Bacterial regulatory protein, Crp | no data | 21 | 94 |
| | Shewanella sp. ANA-3 | Shewana3_2115 | | fumarate/nitrate reduction transcriptional regulator (RefSeq) | no data | 23 | 90 |