| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Rhodospirillum rubrum S1H | Rru_A1170 | | Two Component, Sigma54 Specific, Transcriptional Regulator, Fis family (NCBI) | insig. | 100 | 100 |
| o | Magnetospirillum magneticum AMB-1 | AMB_RS11550 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 59 | 99 |
| o | Rhodopseudomonas palustris CGA009 | TX73_005040 | | sigma-54 dependent transcriptional regulator | insig. | 54 | 99 |
| o | Dechlorosoma suillum PS | Dsui_1154 | | response regulator with CheY-like receiver, AAA-type ATPase, and DNA-binding domains | insig. | 53 | 98 |
| o | Xanthobacter sp. DMC5 | GFF4433 | | Hydrogenase transcriptional regulatory protein hupR1 | insig. | 49 | 98 |
| o | Azospirillum sp. SherDot2 | MPMX19_05290 | | Hydrogenase transcriptional regulatory protein hupR1 | insig. | 49 | 98 |
| o | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF2210 | | Hydrogenase transcriptional regulatory protein HoxA | insig. | 49 | 98 |
| o | Variovorax sp. OAS795 | ABID97_RS13590 | | sigma-54 dependent transcriptional regulator | insig. | 49 | 98 |
| | Phocaeicola vulgatus CL09T03C04 | HMPREF1058_RS04160 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 38 | 97 |
| | Phocaeicola dorei CL03T12C01 | ABI39_RS17060 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 38 | 97 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0823 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | insig. | 40 | 97 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU0946 | | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | sig. | 39 | 89 |
| | Phocaeicola vulgatus CL09T03C04 | HMPREF1058_RS15800 | | sigma-54-dependent Fis family transcriptional regulator | strong | 36 | 97 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2149 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | strong | 38 | 97 |
| | Phocaeicola dorei CL03T12C01 | ABI39_RS11790 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 36 | 97 |
| | Pseudomonas stutzeri RCH2 | Psest_0124 | | Transcriptional regulator containing GAF, AAA-type ATPase, and DNA binding domains | sig. | 49 | 62 |
| | Pseudomonas segetis P6 | ACVTMO_RS00675 | | sigma-54 interaction domain-containing protein | insig. | 47 | 61 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS12650 | | sigma-54 dependent transcriptional regulator | insig. | 38 | 83 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_01292 | | Regulatory protein AtoC | cofit | 38 | 97 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS05610 | | sigma-54-dependent Fis family transcriptional regulator | strong | 37 | 97 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS05610 | | sigma-54-dependent Fis family transcriptional regulator | strong | 37 | 97 |
| | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS14460 | | sigma-54 dependent transcriptional regulator | insig. | 36 | 97 |
| | Azospirillum brasilense Sp245 | AZOBR_RS29300 | | Fis family transcriptional regulator | insig. | 43 | 76 |
| | Pseudomonas simiae WCS417 | PS417_05525 | | Fis family transcriptional regulator | strong | 37 | 97 |
| | Dickeya dianthicola 67-19 | HGI48_RS18785 | | nif-specific transcriptional activator NifA | insig. | 45 | 73 |
| | Dickeya dianthicola ME23 | DZA65_RS19920 | | nif-specific transcriptional activator NifA | insig. | 45 | 73 |
| | Pseudomonas sp. S08-1 | OH686_12810 | | T6SS sigma-54-dependent regulator VasH | insig. | 49 | 62 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_09410 | | Fis family transcriptional regulator | insig. | 47 | 63 |
| | Caulobacter crescentus NA1000 | CCNA_03424 | | AAA-family response regulator tacA | strong | 43 | 82 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_03424 | | AAA-family response regulator tacA | cofit | 43 | 82 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2934 | ntrX | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | no data | 38 | 93 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_16225 | | Fis family transcriptional regulator | insig. | 36 | 97 |
| | Xanthobacter sp. DMC5 | GFF4834 | | Regulatory protein AtoC | insig. | 38 | 97 |
| | Shewanella sp. ANA-3 | Shewana3_3257 | | two component, sigma54 specific, Fis family transcriptional regulator (RefSeq) | insig. | 37 | 93 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU3220 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | no data | 37 | 98 |
| | Pseudomonas orientalis W4I3 | QF045_RS08450 | | sigma-54 dependent transcriptional regulator | insig. | 37 | 97 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS10130 | | sigma 54-interacting transcriptional regulator | insig. | 47 | 64 |
| | Dickeya dadantii 3937 | DDA3937_RS18805 | | nif-specific transcriptional activator NifA | insig. | 49 | 61 |
| | Escherichia fergusonii Becca | EFB2_01635 | | Regulatory protein AtoC | insig. | 36 | 99 |
| | Escherichia coli ECOR38 | HEPCGN_22430 | atoC | acetoacetate metabolism transcriptional regulator AtoC | insig. | 36 | 99 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS12965 | | acetoacetate metabolism transcriptional regulator AtoC | no data | 36 | 99 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF610 | | Putative sensory histidine kinase YfhA | insig. | 43 | 75 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2200 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | no data | 36 | 98 |
| | Escherichia coli BL21 | ECD_02147 | | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein | insig. | 36 | 99 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01490 | | Regulatory protein AtoC | insig. | 36 | 99 |
| | Escherichia coli BW25113 | b2220 | atoC | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein (NCBI) | insig. | 36 | 99 |
| | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS14380 | | sigma-54 dependent transcriptional regulator | insig. | 36 | 97 |
| | Shewanella loihica PV-4 | Shew_2341 | | two component, sigma54 specific, Fis family transcriptional regulator (RefSeq) | insig. | 37 | 97 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_2089 | | Sigma-54 dependent transcriptional regulator | insig. | 47 | 63 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU0569 | flrA | sigma-54 dependent transcriptional regulator (TIGR) | sig. | 46 | 65 |
| | Xanthobacter sp. DMC5 | GFF3675 | | C4-dicarboxylate transport transcriptional regulatory protein DctD | strong | 41 | 86 |
| | Erwinia tracheiphila HP pepo 2.2 | IJEDHG_02930 | qseF | two-component system response regulator QseF/GlrR | cofit | 40 | 79 |
| | Erwinia tracheiphila SCR3 | LU632_RS17930 | glrR | two-component system response regulator GlrR | insig. | 40 | 79 |
| | Bacteroides thetaiotaomicron VPI-5482 | BT1529 | | two-component system response regulator (NCBI ptt file) | strong | 37 | 97 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_1360 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | sig. | 40 | 84 |
| | Rhodopseudomonas palustris CGA009 | TX73_007055 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 41 | 76 |
| | Pseudomonas simiae WCS417 | PS417_15295 | | Fis family transcriptional regulator | insig. | 48 | 60 |
| | Pseudomonas sp. DMC3 | GFF451 | | Anaerobic nitric oxide reductase transcription regulator NorR | cofit | 45 | 63 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_09510 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 38 | 83 |
| | Shewanella oneidensis MR-1 | SO3689 | | sigma-54 dependent nitrogen response regulator (NCBI ptt file) | sig. | 37 | 93 |
| | Rahnella sp. WP5 | EX31_RS15395 | | nif-specific transcriptional activator NifA | insig. | 53 | 52 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_4304 | | Sigma-54 dependent transcriptional regulator | insig. | 46 | 63 |
| | Erwinia amylovora T8 | OLJFJH_10330 | | two-component system response regulator QseF/GlrR | cofit | 51 | 53 |
| | Shewanella amazonensis SB2B | Sama_0727 | | anaerobic nitric oxide reductase transcription regulator (RefSeq) | insig. | 47 | 61 |
| | Pedobacter sp. GW460-11-11-14-LB5 | CA265_RS01040 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 36 | 82 |
| | Klebsiella michiganensis M5al | BWI76_RS18890 | | nif-specific transcriptional activator NifA | sig. | 49 | 60 |
| | Bacteroides stercoris CC31F | HMPREF1181_RS03655 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 40 | 81 |
| | Echinicola vietnamensis KMM 6221, DSM 17526 | Echvi_2422 | | Response regulator containing CheY-like receiver, AAA-type ATPase, and DNA-binding domains | strong | 35 | 92 |
| | Variovorax sp. OAS795 | ABID97_RS06460 | | sigma 54-interacting transcriptional regulator | cofit | 52 | 52 |
| | Klebsiella michiganensis M5al | BWI76_RS21250 | | two-component system response regulator GlrR | sig. | 40 | 79 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_07535 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 37 | 92 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_14055 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 36 | 97 |
| | Serratia liquefaciens MT49 | IAI46_19460 | | two-component system response regulator GlrR | sig. | 54 | 47 |
| | Cellulophaga baltica 18 | M666_RS12540 | | sigma 54-interacting response regulator | insig. | 49 | 52 |
| | Rhizobium sp. OAE497 | ABIE40_RS16175 | | sigma-54 dependent transcriptional regulator | strong | 43 | 71 |
| | Azospirillum sp. SherDot2 | MPMX19_03461 | | Regulatory protein AtoC | insig. | 42 | 77 |
| | Klebsiella michiganensis M5al | BWI76_RS22250 | | nitric oxide reductase transcription regulator | insig. | 48 | 63 |
| | Alteromonas macleodii MIT1002 | MIT1002_01326 | | Quorum-sensing regulator protein F | insig. | 36 | 98 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2455 | | Putative sensory histidine kinase YfhA | strong | 53 | 47 |
| | Bacteroides ovatus ATCC 8483 | BACOVA_04264 | | Sigma-54 interaction domain protein | insig. | 36 | 97 |
| | Shewanella loihica PV-4 | Shew_0726 | | two component, sigma54 specific, Fis family transcriptional regulator (RefSeq) | insig. | 35 | 97 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU1063 | flrC | transcriptional regulatory protein (TIGR) | strong | 48 | 62 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2359 | | sigma-54 dependent transcriptional regulator (TIGR) | insig. | 55 | 49 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_4079 | | Nitrogen regulation protein NtrX | insig. | 49 | 62 |
| | Pseudomonas orientalis W4I3 | QF045_RS13490 | | sigma 54-interacting transcriptional regulator | insig. | 48 | 63 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU0539 | | sigma-54 dependent DNA-binding response regulator (TIGR) | sig. | 40 | 82 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_02735 | | Fis family transcriptional regulator | cofit | 57 | 47 |
| | Sinorhizobium meliloti 1021 | SMc04011 | | sigma-54-dependent transcription regulator protein | insig. | 44 | 68 |
| | Rhodanobacter denitrificans FW104-10B01 | LRK54_RS13485 | | sigma-54-dependent Fis family transcriptional regulator | strong | 44 | 64 |
| | Pseudomonas simiae WCS417 | PS417_11085 | | ATPase AAA | insig. | 48 | 66 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS15090 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 43 | 64 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU0110 | ntrC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | cofit | 38 | 97 |
| | Bosea sp. OAE506 | ABIE41_RS06250 | | sigma 54-interacting transcriptional regulator | insig. | 59 | 45 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS13225 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 44 | 64 |
| | Escherichia fergusonii Becca | EFB2_01342 | | Transcriptional regulatory protein QseF | insig. | 52 | 47 |
| | Escherichia coli ECOR27 | NOLOHH_13170 | qseF | two-component system response regulator QseF/GlrR | cofit | 52 | 47 |
| | Escherichia coli ECOR38 | HEPCGN_20640 | qseF | two-component system response regulator QseF/GlrR | strong | 52 | 47 |
| | Escherichia coli ECRC62 | BNILDI_11970 | qseF | two-component system response regulator QseF/GlrR | strong | 52 | 47 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01153 | | Transcriptional regulatory protein GlrR | insig. | 52 | 47 |
| | Rahnella sp. WP5 | EX31_RS20615 | | two-component system response regulator GlrR | insig. | 55 | 47 |