| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Azospirillum sp. SherDot2 | MPMX19_03130 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 100 | 100 |
| o | Azospirillum brasilense Sp245 | AZOBR_RS26990 | | Fis family transcriptional regulator | insig. | 82 | 99 |
| o | Xanthobacter sp. DMC5 | GFF2822 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 62 | 99 |
| | Azospirillum brasilense Sp245 | AZOBR_RS21185 | | Fis family transcriptional regulator | insig. | 54 | 94 |
| | Azospirillum sp. SherDot2 | MPMX19_06065 | | Anaerobic nitric oxide reductase transcription regulator NorR | cofit | 49 | 96 |
| | Azospirillum sp. SherDot2 | MPMX19_05582 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 51 | 97 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_5631 | | Sigma-54 dependent transcriptional regulator | insig. | 50 | 97 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF5124 | | Sigma-54 dependent transcriptional regulator | insig. | 48 | 96 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_00410 | | Fis family transcriptional regulator | sig. | 50 | 96 |
| | Marinobacter adhaerens HP15 | HP15_3793 | | protein containing RNA polymerase sigma factor 54, interaction / helix-turn-helix, Fis-type | insig. | 51 | 95 |
| | Pseudomonas stutzeri RCH2 | Psest_1071 | | Transcriptional regulator containing PAS, AAA-type ATPase, and DNA-binding domains | strong | 46 | 96 |
| | Pseudomonas sp. SVBP6 | COO64_RS23875 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 50 | 96 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_21780 | | Fis family transcriptional regulator | insig. | 50 | 96 |
| | Pseudomonas segetis P6 | MPMX49_00786 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 47 | 96 |
| | Variovorax sp. OAS795 | ABID97_RS17700 | | sigma 54-interacting transcriptional regulator | insig. | 49 | 97 |
| | Pseudomonas sp. RS175 | PFR28_01397 | | Anaerobic nitric oxide reductase transcription regulator NorR | sig. | 50 | 96 |
| | Pseudomonas fluorescens GW456-L13 | PfGW456L13_2875 | | Sigma-54 dependent transcriptional regulator | strong | 49 | 96 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_2039 | | Sigma-54 dependent transcriptional regulator | sig. | 49 | 96 |
| | Variovorax sp. SCN45 | GFF518 | | Transcriptional regulator containing PAS, AAA-type ATPase, and DNA-binding domains | insig. | 49 | 96 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_63 | | Sigma-54 dependent transcriptional regulator | insig. | 49 | 96 |
| | Pseudomonas sp. DMC3 | GFF3656 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 49 | 96 |
| | Pseudomonas simiae WCS417 | PS417_12160 | | Fis family transcriptional regulator | insig. | 48 | 96 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_03364 | | Anaerobic nitric oxide reductase transcription regulator NorR | cofit | 49 | 97 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS12850 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 48 | 97 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS12850 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 48 | 97 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_09800 | | sigma-54-dependent transcriptional regulator HbcR | insig. | 48 | 96 |
| | Paraburkholderia graminis OAS925 | ABIE53_004708 | | transcriptional regulator with PAS, ATPase and Fis domain | insig. | 46 | 96 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS34340 | | Fis family transcriptional regulator | strong | 46 | 96 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_03547 | | Transcriptional regulator containing PAS, AAA-type ATPase, and DNA-binding Fis domains | insig. | 46 | 96 |
| | Pseudomonas sp. S08-1 | OH686_00830 | | Transcriptional regulator | cofit | 49 | 96 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS17125 | | sigma 54-interacting transcriptional regulator | insig. | 46 | 96 |
| | Pseudomonas putida KT2440 | PP_3075 | | putative transcriptional regulator | strong | 49 | 96 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS10735 | | Fis family transcriptional regulator | insig. | 46 | 96 |
| o | Desulfovibrio vulgaris Miyazaki F | DvMF_1933 | | PAS modulated sigma54 specific transcriptional regulator, Fis family (RefSeq) | insig. | 39 | 92 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2114 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | insig. | 47 | 70 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF4188 | | Response regulator of zinc sigma-54-dependent two-component system | insig. | 46 | 73 |
| | Escherichia fergusonii Becca | EFB2_04606 | | Transcriptional regulatory protein ZraR | insig. | 45 | 73 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS23090 | | sigma-54-dependent response regulator transcription factor ZraR | insig. | 45 | 73 |
| | Escherichia coli BW25113 | b4004 | zraR | fused DNA-binding response regulator in two-component regulatory system with ZraS: response regulator/sigma54 interaction protein (NCBI) | insig. | 45 | 73 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_16225 | | Fis family transcriptional regulator | insig. | 46 | 69 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS23170 | | ATPase AAA | insig. | 49 | 65 |
| | Escherichia coli BL21 | ECD_03881 | | fused DNA-binding response regulator in two-component regulatory system with ZraS: response regulator/sigma54 interaction protein | insig. | 45 | 73 |
| | Escherichia coli ECRC100 | OKFHMN_13320 | zraR | sigma-54-dependent response regulator transcription factor ZraR | cofit | 45 | 73 |
| | Escherichia coli ECOR38 | HEPCGN_11960 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 44 | 73 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0823 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | insig. | 45 | 68 |
| | Escherichia coli ECRC101 | MCAODC_03820 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 45 | 73 |
| | Escherichia coli ECRC102 | NIAGMN_11070 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 45 | 73 |
| | Escherichia coli ECRC99 | KEDOAH_14840 | zraR | sigma-54-dependent response regulator transcription factor ZraR | no data | 45 | 73 |
| | Escherichia coli ECRC62 | BNILDI_06055 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 44 | 73 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_10090 | | sigma-54-dependent response regulator transcription factor ZraR | insig. | 45 | 75 |
| | Escherichia coli ECOR27 | NOLOHH_05465 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 44 | 73 |
| | Rhodopseudomonas palustris CGA009 | TX73_007055 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 44 | 70 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_04045 | | Transcriptional regulatory protein ZraR | insig. | 44 | 73 |
| | Escherichia coli BL21 | ECD_02147 | | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein | insig. | 43 | 75 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01490 | | Regulatory protein AtoC | insig. | 43 | 75 |
| | Escherichia coli BW25113 | b2220 | atoC | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein (NCBI) | insig. | 43 | 75 |
| | Escherichia coli ECRC98 | JDDGAC_16945 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 44 | 73 |
| | Escherichia fergusonii Becca | EFB2_01635 | | Regulatory protein AtoC | insig. | 43 | 75 |
| | Escherichia coli ECOR38 | HEPCGN_22430 | atoC | acetoacetate metabolism transcriptional regulator AtoC | insig. | 43 | 75 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS12965 | | acetoacetate metabolism transcriptional regulator AtoC | no data | 43 | 75 |
| | Pseudomonas sp. DMC3 | GFF2762 | | Phenol regulator MopR | cofit | 42 | 77 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_09410 | | Fis family transcriptional regulator | insig. | 49 | 67 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU1419 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | sig. | 46 | 67 |
| | Pseudomonas sp. S08-1 | OH686_12810 | | T6SS sigma-54-dependent regulator VasH | insig. | 44 | 79 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_01779 | | DNA-binding transcriptional response regulator, NtrC family, contains REC, AAA-type ATPase, and a Fis-type DNA-binding domains | insig. | 44 | 75 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS15995 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 36 | 95 |
| | Pseudomonas sp. DMC3 | GFF451 | | Anaerobic nitric oxide reductase transcription regulator NorR | cofit | 44 | 77 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0670 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | insig. | 45 | 66 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_1790 | | Sigma-54 dependent transcriptional regulator | insig. | 47 | 67 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_29210 | | AAA family ATPase | insig. | 46 | 67 |
| | Escherichia fergusonii Becca | EFB2_01032 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 36 | 95 |
| | Escherichia coli ECOR38 | HEPCGN_18985 | uacR | Putative uric acid sigma-54-dependent transcriptional regulator UacR | insig. | 36 | 95 |
| | Azospirillum brasilense Sp245 | AZOBR_RS29300 | | Fis family transcriptional regulator | insig. | 42 | 70 |
| | Caulobacter crescentus NA1000 | CCNA_03424 | | AAA-family response regulator tacA | strong | 41 | 69 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_03424 | | AAA-family response regulator tacA | cofit | 41 | 69 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_18205 | | Fis family transcriptional regulator | insig. | 46 | 65 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS30045 | | ATPase AAA | insig. | 44 | 75 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS11255 | | Fis family transcriptional regulator | strong | 38 | 95 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_2089 | | Sigma-54 dependent transcriptional regulator | insig. | 42 | 86 |
| | Pseudomonas sp. DMC3 | GFF5115 | | C4-dicarboxylate transport transcriptional regulatory protein DctD | insig. | 46 | 65 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_5565 | | Two component, Sigma-54 Specific, central transcriptional regulator of acidic amino acid uptake | insig. | 45 | 65 |
| | Pseudomonas segetis P6 | MPMX49_00138 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 44 | 72 |
| | Escherichia coli ECRC62 | BNILDI_12310 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 42 | 76 |
| | Klebsiella michiganensis M5al | BWI76_RS01605 | | transcriptional regulatory protein ZraR | insig. | 46 | 73 |
| | Xanthobacter sp. DMC5 | GFF4834 | | Regulatory protein AtoC | insig. | 44 | 72 |
| | Marinobacter adhaerens HP15 | HP15_4023 | | helix-turn-helix, Fis-type | insig. | 40 | 77 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2149 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | strong | 44 | 65 |
| | Escherichia coli ECRC100 | OKFHMN_21850 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 43 | 75 |
| | Escherichia coli ECRC101 | MCAODC_12380 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 43 | 75 |
| | Escherichia coli ECRC102 | NIAGMN_19620 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 43 | 75 |
| | Escherichia coli ECRC98 | JDDGAC_25795 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 43 | 75 |
| | Escherichia coli ECRC99 | KEDOAH_06370 | hyfR | DNA-binding transcriptional regulator HyfR | no data | 43 | 75 |
| | Escherichia coli BL21 | ECD_02383 | | hydrogenase-4 transcriptional activator | cofit | 41 | 76 |
| | Escherichia coli BW25113 | b2491 | hyfR | putative 2-component regulator, interaction with sigma 54 (VIMSS) | sig. | 41 | 76 |
| | Escherichia coli BL21 | ECD_02702 | | putative sigma-54-interacting transcriptional activator | insig. | 36 | 95 |
| | Klebsiella michiganensis M5al | BWI76_RS10230 | | AAA family ATPase | no data | 44 | 72 |
| | Escherichia coli ECOR27 | NOLOHH_11625 | uacR | Putative uric acid sigma-54-dependent transcriptional regulator UacR | insig. | 35 | 95 |
| | Escherichia coli ECRC62 | BNILDI_10150 | uacR | Putative uric acid sigma-54-dependent transcriptional regulator UacR | cofit | 35 | 95 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_00846 | | Anaerobic nitric oxide reductase transcription regulator NorR | insig. | 35 | 95 |
| | Escherichia fergusonii Becca | EFB2_01192 | | Formate hydrogenlyase transcriptional activator FhlA | cofit | 40 | 89 |