| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Variovorax sp. SCN45 | GFF2200 | | sigma-54-dependent transcriptional regulator | insig. | 100 | 100 |
| o | Variovorax sp. OAS795 | ABID97_RS24330 | | sigma 54-interacting transcriptional regulator | insig. | 92 | 100 |
| o | Burkholderia phytofirmans PsJN | BPHYT_RS08215 | | Fis family transcriptional regulator | insig. | 64 | 100 |
| o | Paraburkholderia graminis OAS925 | ABIE53_002431 | | DNA-binding NtrC family response regulator | insig. | 64 | 100 |
| o | Ralstonia solanacearum PSI07 | RPSI07_RS05015 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 56 | 98 |
| o | Ralstonia solanacearum GMI1000 | RS_RS22325 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 56 | 98 |
| o | Ralstonia sp. UNC404CL21Col | ABZR87_RS19575 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 55 | 98 |
| o | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS18540 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 55 | 98 |
| o | Ralstonia solanacearum UW163 | UW163_RS20590 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 55 | 98 |
| o | Cupriavidus basilensis FW507-4G11 | RR42_RS35955 | | Fis family transcriptional regulator | insig. | 54 | 97 |
| | Rhodanobacter denitrificans FW104-10B01 | LRK54_RS05020 | | sigma-54 dependent transcriptional regulator | strong | 41 | 69 |
| | Marinobacter adhaerens HP15 | HP15_523 | | two component, sigma54 specific, transcriptional regulator, Fis family | strong | 41 | 69 |
| | Dyella japonica UNC79MFTsu3.2 | ABZR86_RS11070 | | sigma-54 dependent transcriptional regulator | cofit | 42 | 70 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS04990 | | sigma-54 dependent transcriptional regulator | cofit | 41 | 69 |
| | Rhodopseudomonas palustris CGA009 | TX73_007390 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 36 | 69 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS04800 | | sigma-54 dependent transcriptional regulator | cofit | 39 | 69 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_01730 | atoC | sigma-54-dependent Fis family transcriptional regulator | cofit | 40 | 69 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS23520 | | sigma-54 dependent transcriptional regulator | insig. | 39 | 77 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS42175 | | nif-specific transcriptional activator NifA | insig. | 37 | 73 |
| | Paraburkholderia graminis OAS925 | ABIE53_005506 | | transcriptional regulator of acetoin/glycerol metabolism | strong | 40 | 64 |
| | Alteromonas macleodii MIT1002 | MIT1002_01081 | | Nitrogen assimilation regulatory protein | cofit | 37 | 69 |
| | Pseudomonas sp. SVBP6 | COO64_RS13325 | ntrC | nitrogen regulation protein NR(I) | insig. | 36 | 86 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_09510 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 36 | 74 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_1213 | | sigma54 specific transcriptional regulator, Fis family (RefSeq) | insig. | 36 | 73 |
| | Pseudomonas fluorescens GW456-L13 | PfGW456L13_347 | | Nitrogen regulation protein NR(I) | strong | 36 | 86 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_00790 | | two-component response regulator PilR | strong | 35 | 86 |
| | Pseudomonas aeruginosa PUPa3 | DQ20_RS56175 | pilR;inference=COORDINATES | two-component system response regulator PilR | strong | 35 | 86 |
| | Methylophilus sp. DMC18 | GFF1426 | | Transcriptional regulatory protein ZraR | insig. | 39 | 68 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS23310 | | sigma-54-dependent Fis family transcriptional regulator | strong | 39 | 70 |
| | Ralstonia solanacearum UW163 | UW163_RS16560 | | sigma-54-dependent Fis family transcriptional regulator | strong | 39 | 70 |
| | Pseudomonas aeruginosa MRSN321 | DY961_RS23710 | pilR;inference=COORDINATES | two-component system response regulator PilR | strong | 35 | 86 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_12145 | | nitrogen regulation protein NR(I) | strong | 36 | 86 |
| | Rahnella sp. WP5 | EX31_RS15395 | | nif-specific transcriptional activator NifA | insig. | 39 | 69 |
| | Ralstonia solanacearum GMI1000 | RS_RS25110 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 39 | 69 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2149 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | strong | 38 | 78 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_4822 | | Helix-turn-helix, Fis-type:Nitrogen regulation protein NR(I) | sig. | 36 | 86 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_4822 | | Helix-turn-helix, Fis-type:Nitrogen regulation protein NR(I) | no data | 36 | 86 |
| | Pseudomonas sp. DMC3 | GFF4081 | | DNA-binding transcriptional regulator NtrC | strong | 35 | 86 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2934 | ntrX | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | no data | 37 | 72 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS05610 | | sigma-54-dependent Fis family transcriptional regulator | strong | 36 | 81 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS05610 | | sigma-54-dependent Fis family transcriptional regulator | strong | 36 | 81 |
| | Azospirillum sp. SherDot2 | MPMX19_03461 | | Regulatory protein AtoC | insig. | 40 | 69 |
| | Variovorax sp. OAS795 | ABID97_RS06460 | | sigma 54-interacting transcriptional regulator | cofit | 39 | 69 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_3826 | | Nitrogen regulation protein NR(I) | strong | 35 | 86 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_13865 | | nitrogen regulation protein NR(I) | insig. | 33 | 86 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_09730 | | nitrogen regulation protein NR(I) | strong | 35 | 86 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU0118 | ntrC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | insig. | 40 | 69 |
| | Pseudomonas stutzeri RCH2 | Psest_0705 | | Response regulator containing CheY-like receiver, AAA-type ATPase, and DNA-binding domains | strong | 38 | 75 |
| | Azospirillum brasilense Sp245 | AZOBR_RS29300 | | Fis family transcriptional regulator | insig. | 36 | 70 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_01292 | | Regulatory protein AtoC | cofit | 36 | 81 |
| | Pseudomonas sp. RS175 | PFR28_04944 | | DNA-binding transcriptional regulator NtrC | strong | 35 | 86 |
| | Pseudomonas simiae WCS417 | PS417_15295 | | Fis family transcriptional regulator | insig. | 39 | 71 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS03980 | | Fis family transcriptional regulator | strong | 36 | 86 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_1611 | | Nitrogen regulation protein NR(I) | strong | 35 | 86 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS19345 | | sigma-54 dependent transcriptional regulator | no data | 38 | 71 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_16225 | | Fis family transcriptional regulator | insig. | 37 | 72 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS01685 | | nitrogen regulation protein NR(I) | sig. | 35 | 86 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS01685 | | nitrogen regulation protein NR(I) | strong | 35 | 86 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_00547 | | DNA-binding transcriptional regulator NtrC | insig. | 35 | 86 |
| | Pseudomonas simiae WCS417 | PS417_01635 | | nitrogen regulation protein NR(I) | strong | 35 | 86 |
| | Marinobacter adhaerens HP15 | HP15_425 | | two-component response regulator NtrC | strong | 38 | 68 |
| | Pseudomonas sp. BP01 | JOY50_RS09450 | ntrC | nitrogen regulation protein NR(I) | cofit | 35 | 86 |
| | Shewanella loihica PV-4 | Shew_3561 | | nitrogen metabolism transcriptional regulator, NtrC, Fis family (RefSeq) | strong | 34 | 81 |
| | Shewanella amazonensis SB2B | Sama_2301 | | response regulator receiver protein (RefSeq) | strong | 38 | 68 |
| | Pseudomonas sp. S08-1 | OH686_02855 | | Flagellar regulatory protein FleQ | cofit | 38 | 78 |
| | Pseudomonas sp. S08-1 | OH686_13325 | | Two component, Sigma-54 Specific, central transcriptional regulator of acidic amino acid uptake | cofit | 36 | 81 |
| | Pseudomonas orientalis W4I3 | QF045_RS04705 | | nitrogen regulation protein NR(I) | insig. | 36 | 86 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF610 | | Putative sensory histidine kinase YfhA | insig. | 46 | 53 |
| | Variovorax sp. SCN45 | GFF7323 | | Transcriptional response regulatory protein GlrR | insig. | 38 | 69 |
| | Pseudomonas aeruginosa MRSN321 | DY961_RS11455 | ntrC;inference=COORDINATES | two-component system response regulator NtrC | strong | 36 | 86 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_27895 | | two-component system response regulator NtrC | insig. | 36 | 86 |
| | Pseudomonas aeruginosa PUPa3 | DQ20_RS50645 | ntrC;inference=COORDINATES | two-component system response regulator NtrC | strong | 36 | 86 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_18205 | | Fis family transcriptional regulator | insig. | 37 | 73 |
| | Pseudomonas sp. S08-1 | OH686_10640 | | nitrogen regulation protein NR(I) | cofit | 35 | 86 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_14720 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 33 | 93 |
| | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS14460 | | sigma-54 dependent transcriptional regulator | insig. | 38 | 69 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS12980 | | chemotaxis protein CheY | strong | 40 | 67 |
| | Pseudomonas sp. SVBP6 | COO64_RS07975 | | sigma-54 dependent transcriptional regulator | insig. | 39 | 68 |
| | Dickeya dianthicola ME23 | DZA65_RS19920 | | nif-specific transcriptional activator NifA | insig. | 39 | 70 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_4011 | | Putative sensory histidine kinase YfhA | sig. | 39 | 69 |
| | Pseudomonas segetis P6 | ACVTMO_RS19460 | | sigma-54-dependent transcriptional regulator | cofit | 39 | 69 |
| | Pseudomonas aeruginosa MRSN321 | DY961_RS03885 | norR;go_function=DNA-binding | nitric oxide reductase transcriptional regulator NorR | insig. | 39 | 71 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_13385 | | nitric oxide reductase transcriptional regulator NorR | sig. | 39 | 71 |
| | Pseudomonas aeruginosa PUPa3 | DQ20_RS34920 | norR;go_function=DNA-binding | nitric oxide reductase transcriptional regulator NorR | insig. | 39 | 71 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_01307 | | Transcriptional regulator of acetoin/glycerol metabolism | insig. | 38 | 64 |
| | Pseudomonas aeruginosa MRSN321 | DY961_RS06965 | fleQ;inference=COORDINATES | transcriptional regulator FleQ | strong | 38 | 78 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_05045 | | transcriptional regulator FleQ | strong | 38 | 78 |
| | Pseudomonas aeruginosa PUPa3 | DQ20_RS45870 | fleQ;inference=COORDINATES | transcriptional regulator FleQ | strong | 38 | 78 |
| | Shewanella oneidensis MR-1 | SO3232 | flrA | flagellar regulatory protein A (NCBI ptt file) | strong | 37 | 68 |
| | Shewanella loihica PV-4 | Shew_1362 | | sigma-54 dependent trancsriptional regulator (RefSeq) | strong | 37 | 68 |
| | Pseudomonas segetis P6 | ACVTMO_RS21260 | ntrC | nitrogen regulation protein NR(I) | strong | 36 | 71 |
| | Shewanella sp. ANA-3 | Shewana3_2849 | | sigma-54 dependent trancsriptional regulator (RefSeq) | insig. | 36 | 75 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS23315 | | sigma-54-dependent Fis family transcriptional regulator | strong | 34 | 86 |
| | Ralstonia solanacearum UW163 | UW163_RS16565 | | sigma-54-dependent Fis family transcriptional regulator | strong | 34 | 86 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_4350 | | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Acinetobacter baumannii LAC-4 | RR41_RS08030 | | nitrogen regulation protein NR(I) | insig. | 33 | 86 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_1363 | | PEP-CTERM-box response regulator transcription factor | strong | 39 | 72 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2114 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | insig. | 40 | 69 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF5269 | | Nitrogen regulation protein NR(I) | insig. | 39 | 72 |
| | Sphingobium sp. HT1-2 | GFF1148 | | Nitrogen regulation protein NR(I), GlnG (=NtrC) | strong | 38 | 67 |
| | Dickeya dadantii 3937 | DDA3937_RS18805 | | nif-specific transcriptional activator NifA | insig. | 37 | 70 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_5565 | | Two component, Sigma-54 Specific, central transcriptional regulator of acidic amino acid uptake | insig. | 37 | 73 |
| | Pseudomonas sp. DMC3 | GFF5115 | | C4-dicarboxylate transport transcriptional regulatory protein DctD | insig. | 36 | 73 |
| | Rhodopseudomonas palustris CGA009 | TX73_007055 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 35 | 69 |
| | Pseudomonas putida KT2440 | PP_5048 | | two-component system DNA-binding transcriptional dual regulator GlnL/GlnG | strong | 35 | 86 |
| | Ralstonia solanacearum GMI1000 | RS_RS25105 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 34 | 86 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_09000 | | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Caulobacter crescentus NA1000 | CCNA_03424 | | AAA-family response regulator tacA | strong | 40 | 64 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_03424 | | AAA-family response regulator tacA | cofit | 40 | 64 |
| | Dickeya dianthicola 67-19 | HGI48_RS18785 | | nif-specific transcriptional activator NifA | insig. | 39 | 70 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS14390 | | ATPase AAA | strong | 36 | 73 |
| | Methylophilus sp. DMC18 | GFF1988 | | Sigma54-dependent transcriptional activator SfnR | insig. | 41 | 66 |
| | Shewanella sp. ANA-3 | Shewana3_1338 | | sigma-54 dependent trancsriptional regulator (RefSeq) | strong | 37 | 68 |
| | Variovorax sp. SCN45 | GFF3066 | | Nitrogen regulation protein NR(I), GlnG (=NtrC) | no data | 33 | 81 |
| | Rhodanobacter sp000427505 FW510-R12 | LRK53_RS15090 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 44 | 53 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS23710 | | response regulator GlrR | insig. | 42 | 57 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS15540 | | nitrogen regulation protein NR(I) | no data | 40 | 67 |
| | Ralstonia solanacearum UW163 | UW163_RS13000 | | nitrogen regulation protein NR(I) | no data | 40 | 67 |
| | Ralstonia solanacearum GMI1000 | RS_RS06320 | | nitrogen regulation protein NR(I) | no data | 40 | 67 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS11070 | | nitrogen regulation protein NR(I) | strong | 40 | 67 |
| | Rhodanobacter sp. FW510-T8 | OKGIIK_02735 | | Fis family transcriptional regulator | cofit | 39 | 73 |
| | Azospirillum sp. SherDot2 | MPMX19_04512 | | C4-dicarboxylate transport transcriptional regulatory protein DctD | insig. | 38 | 72 |
| | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS05570 | | sigma-54 dependent transcriptional regulator | insig. | 37 | 70 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2109 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | strong | 34 | 81 |
| | Enterobacter sp. TBS_079 | MPMX20_04597 | | DNA-binding transcriptional regulator NtrC | strong | 34 | 86 |
| | Xanthobacter sp. DMC5 | GFF2901 | | C4-dicarboxylate transport transcriptional regulatory protein DctD | insig. | 47 | 48 |
| | Variovorax sp. OAS795 | ABID97_RS09945 | | nitrogen regulation protein NR(I) | cofit | 39 | 67 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_3461 | | Helix-turn-helix, Fis-type | strong | 37 | 77 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_3461 | | Helix-turn-helix, Fis-type | cofit | 37 | 77 |
| | Escherichia fergusonii Becca | EFB2_01635 | | Regulatory protein AtoC | insig. | 37 | 69 |
| | Escherichia coli ECOR38 | HEPCGN_22430 | atoC | acetoacetate metabolism transcriptional regulator AtoC | insig. | 37 | 69 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS12965 | | acetoacetate metabolism transcriptional regulator AtoC | no data | 37 | 69 |
| | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS14565 | | sigma-54 dependent transcriptional regulator | no data | 47 | 45 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS17815 | | nitrogen regulation protein NR(I) | insig. | 40 | 67 |
| | Klebsiella michiganensis M5al | BWI76_RS18890 | | nif-specific transcriptional activator NifA | sig. | 39 | 69 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS19020 | | sigma-54 dependent transcriptional regulator | insig. | 38 | 71 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_14200 | | transcriptional regulator | insig. | 34 | 86 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS14515 | | sigma-54 dependent transcriptional regulator | insig. | 48 | 47 |
| | Dechlorosoma suillum PS | Dsui_0940 | | Nif-specific regulatory protein | strong | 46 | 50 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_4432 | | Nitrogen regulation protein NR(I) | strong | 38 | 67 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS05575 | | Fis family transcriptional regulator | strong | 38 | 69 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_0722 | | Two-component response regulator PilR | insig. | 37 | 68 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_0722 | | Two-component response regulator PilR | insig. | 37 | 68 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS30045 | | ATPase AAA | insig. | 38 | 69 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS07835 | | sigma-54-dependent Fis family transcriptional regulator | strong | 38 | 68 |
| | Klebsiella pneumoniae MRSN742743 | KFA93_RS24385 | zraR;go_function=sequence-specific | sigma-54-dependent response regulator transcription factor ZraR | insig. | 36 | 76 |
| | Pseudomonas simiae WCS417 | PS417_05525 | | Fis family transcriptional regulator | strong | 35 | 81 |
| | Rhodanobacter denitrificans FW104-10B01 | LRK54_RS13485 | | sigma-54-dependent Fis family transcriptional regulator | strong | 44 | 53 |
| | 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. | 39 | 69 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS07840 | | sigma-54-dependent Fis family transcriptional regulator | strong | 38 | 69 |
| | Pseudomonas simiae WCS417 | PS417_19825 | | ATPase AAA | strong | 38 | 77 |
| | Phocaeicola dorei CL03T12C01 | ABI39_RS17680 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 33 | 83 |
| | Acinetobacter radioresistens SK82 | MPMX26_01292 | | DNA-binding transcriptional regulator NtrC | strong | 32 | 86 |
| | Escherichia coli ECOR38 | HEPCGN_21015 | hyfR | DNA-binding transcriptional activator HyfR | insig. | 46 | 50 |
| | Rhodopseudomonas palustris CGA009 | TX73_021705 | | sigma-54 dependent transcriptional regulator | sig. | 44 | 49 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_04163 | | Anaerobic nitric oxide reductase transcription regulator NorR | strong | 38 | 77 |
| | Pseudomonas sp. S08-1 | OH686_16390 | | Type IV fimbriae expression regulatory protein PilR | cofit | 37 | 86 |
| | Escherichia coli BL21 | ECD_02147 | | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein | insig. | 37 | 69 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01490 | | Regulatory protein AtoC | insig. | 37 | 69 |
| | Escherichia coli BW25113 | b2220 | atoC | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein (NCBI) | insig. | 37 | 69 |
| | Pseudomonas orientalis W4I3 | QF045_RS08450 | | sigma-54 dependent transcriptional regulator | insig. | 36 | 83 |
| | Klebsiella pneumoniae MRSN742743 | KFA93_RS22480 | glnG;go_function=sequence-specific | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Rahnella sp. WP5 | EX31_RS20615 | | two-component system response regulator GlrR | insig. | 43 | 56 |
| | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.2800.1 | | Flagellar regulatory protein FleQ | sig. | 39 | 67 |
| | Pseudomonas stutzeri RCH2 | Psest_3932 | | nitrogen regulation protein NR(I) | strong | 39 | 68 |
| | Acidovorax sp. GW101-3H11 | Ac3H11_4019 | | Sigma-54 dependent transcriptional regulator | sig. | 39 | 69 |
| | Methylophilus sp. DMC18 | GFF2815 | | Regulatory protein AtoC | insig. | 38 | 68 |
| | Marinobacter adhaerens HP15 | HP15_2330 | | two component, sigma54 specific, transcriptional regulator, Fis family | strong | 38 | 70 |
| | Pseudomonas stutzeri RCH2 | Psest_1765 | | Response regulator containing CheY-like receiver, AAA-type ATPase, and DNA-binding domains | strong | 37 | 78 |
| | Pseudomonas orientalis W4I3 | QF045_RS21955 | | sigma-54 dependent transcriptional regulator | cofit | 37 | 77 |
| | Dechlorosoma suillum PS | Dsui_1758 | | response regulator with CheY-like receiver, AAA-type ATPase, and DNA-binding domains | cofit | 37 | 69 |
| | Pseudomonas sp. RS175 | PFR28_03376 | | C4-dicarboxylate transport transcriptional regulatory protein DctD | sig. | 37 | 73 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU3305 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | strong | 36 | 74 |
| | Magnetospirillum magneticum AMB-1 | AMB_RS11950 | | nitrogen regulation protein NR(I) | no data | 36 | 76 |
| | Rhodopseudomonas palustris CGA009 | TX73_024055 | | nif-specific transcriptional activator NifA | strong | 36 | 69 |
| | Lysobacter sp. OAE881 | ABIE51_RS04850 | | sigma-54 dependent transcriptional regulator | strong | 35 | 86 |
| | Cellulophaga baltica 18 | M666_RS03195 | | sigma-54 dependent transcriptional regulator | insig. | 35 | 68 |
| | Escherichia coli ECOR27 | NOLOHH_06240 | glnG | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Escherichia coli ECRC100 | OKFHMN_14110 | glnG | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Escherichia coli ECRC101 | MCAODC_04610 | glnG | nitrogen regulation protein NR(I) | strong | 34 | 86 |
| | Escherichia coli ECRC102 | NIAGMN_11865 | glnG | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Escherichia coli ECRC98 | JDDGAC_17735 | glnG | nitrogen regulation protein NR(I) | no data | 34 | 86 |
| | Escherichia coli ECRC99 | KEDOAH_14040 | glnG | nitrogen regulation protein NR(I) | no data | 34 | 86 |
| | Escherichia coli BW25113 | b3868 | glnG | fused DNA-binding response regulator in two-component regulatory system with GlnL: response regulator/sigma54 interaction protein (NCBI) | strong | 34 | 86 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_04184 | | DNA-binding transcriptional regulator NtrC | sig. | 34 | 86 |
| | Dechlorosoma suillum PS | Dsui_1397 | | response regulator with CheY-like receiver, AAA-type ATPase, and DNA-binding domains | cofit | 40 | 71 |
| | Xanthomonas campestris pv. campestris strain 8004 | Xcc-8004.1353.1 | | Type IV fimbriae expression regulatory protein PilR | sig. | 39 | 68 |
| | Escherichia fergusonii Becca | EFB2_04748 | | DNA-binding transcriptional regulator NtrC | strong | 38 | 67 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS23515 | | sigma-54 dependent transcriptional regulator | strong | 38 | 70 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_00240 | | two component, sigma54 specific, transcriptional regulator, NtrC subfamily, Fis family | strong | 38 | 69 |
| | Pseudomonas sp. DMC3 | GFF2445 | | Anaerobic nitric oxide reductase transcription regulator NorR | cofit | 38 | 77 |
| | Pseudomonas sp. SVBP6 | COO64_RS21300 | fleQ | transcriptional regulator FleQ | cofit | 38 | 77 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS21795 | | sigma-54-dependent Fis family transcriptional regulator | strong | 37 | 77 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS21795 | | sigma-54-dependent Fis family transcriptional regulator | strong | 37 | 77 |
| | Pseudomonas stutzeri RCH2 | Psest_0999 | | Response regulator containing CheY-like receiver, AAA-type ATPase, and DNA-binding domains | strong | 37 | 69 |
| | Mucilaginibacter yixingensis YX-36 DSM 26809 | ABZR88_RS10015 | | sigma-54 dependent transcriptional regulator | sig. | 36 | 72 |
| | Pseudomonas fluorescens GW456-L13 | PfGW456L13_4775 | | Two component, Sigma-54 Specific, central transcriptional regulator of acidic amino acid uptake | strong | 36 | 73 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU1419 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | sig. | 35 | 83 |
| | Escherichia coli BL21 | ECD_03753 | | fused DNA-binding response regulator in two-component regulatory system with GlnL: response regulator/sigma54 interaction protein | insig. | 34 | 86 |
| | Escherichia coli ECRC62 | BNILDI_05290 | glnG | nitrogen regulation protein NR(I) | cofit | 34 | 86 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS12705 | | transcriptional regulator | insig. | 46 | 51 |
| | Escherichia coli ECRC100 | OKFHMN_21850 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 46 | 50 |
| | Escherichia coli ECRC101 | MCAODC_12380 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 46 | 50 |
| | Escherichia coli ECRC102 | NIAGMN_19620 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 46 | 50 |
| | Escherichia coli ECRC98 | JDDGAC_25795 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 46 | 50 |
| | Escherichia coli ECRC99 | KEDOAH_06370 | hyfR | DNA-binding transcriptional regulator HyfR | no data | 46 | 50 |
| | Escherichia coli BW25113 | b2491 | hyfR | putative 2-component regulator, interaction with sigma 54 (VIMSS) | sig. | 46 | 50 |
| | Dickeya dadantii 3937 | DDA3937_RS07400 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 43 | 50 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS22295 | | nitrogen regulation protein NR(I) | strong | 38 | 67 |
| | Pseudomonas stutzeri RCH2 | Psest_0192 | | Response regulator containing CheY-like receiver, AAA-type ATPase, and DNA-binding domains | strong | 38 | 74 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2220 | | Nitrogen regulation protein NR(I) | strong | 38 | 67 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_0831 | | Two-component response regulator CbrB | sig. | 36 | 69 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_0831 | | Two-component response regulator CbrB | no data | 36 | 69 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_10090 | | sigma-54-dependent response regulator transcription factor ZraR | insig. | 36 | 76 |
| | Escherichia coli BL21 | ECD_02383 | | hydrogenase-4 transcriptional activator | cofit | 46 | 50 |
| | Pontibacter actiniarum KMM 6156, DSM 19842 | CA264_05310 | | sigma-54-dependent Fis family transcriptional regulator | no data | 39 | 57 |
| | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF1930 | | Transcriptional regulatory protein zraR | insig. | 38 | 68 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_04161 | | Regulatory protein AtoC | cofit | 38 | 68 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_18660 | | AAA family ATPase | strong | 38 | 77 |
| | Pseudomonas sp. SVBP6 | COO64_RS16760 | | sigma-54 dependent transcriptional regulator | insig. | 37 | 68 |
| | Serratia liquefaciens MT49 | IAI46_24960 | | nitrogen regulation protein NR(I) | strong | 34 | 86 |
| | Methylophilus sp. DMC18 | GFF2024 | | DNA-binding transcriptional regulator NtrC | strong | 34 | 87 |
| | Rhodanobacter denitrificans MT42 | LRK55_RS13225 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 43 | 53 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2200 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | no data | 46 | 49 |
| | Dechlorosoma suillum PS | Dsui_0135 | | response regulator with CheY-like receiver, AAA-type ATPase, and DNA-binding domains | cofit | 38 | 74 |
| | Marinobacter adhaerens HP15 | HP15_1891 | | two component, sigma54 specific, transcriptional regulator, Fis family | insig. | 37 | 72 |
| | Escherichia coli ECRC62 | BNILDI_12310 | hyfR | DNA-binding transcriptional regulator HyfR | insig. | 45 | 50 |
| | Shewanella loihica PV-4 | Shew_2282 | | Fis family transcriptional regulator (RefSeq) | insig. | 44 | 50 |
| | Pseudomonas orientalis W4I3 | QF045_RS21945 | | sigma-54 dependent transcriptional regulator | insig. | 38 | 68 |
| | Paraburkholderia graminis OAS925 | ABIE53_001365 | | DNA-binding NtrC family response regulator | strong | 37 | 69 |
| | Pseudomonas sp. RS175 | PFR28_00828 | | Anaerobic nitric oxide reductase transcription regulator NorR | strong | 37 | 77 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_03855 | | AAA family ATPase | strong | 37 | 77 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_2597 | | Flagellar regulatory protein FleQ | strong | 37 | 77 |
| | Pseudomonas segetis P6 | ACVTMO_RS00675 | | sigma-54 interaction domain-containing protein | insig. | 35 | 73 |
| | Escherichia coli ECOR38 | HEPCGN_12740 | glnG | nitrogen regulation protein NR(I) | insig. | 34 | 86 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_10670 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 43 | 49 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_3599 | | Flagellar regulatory protein FleQ | insig. | 38 | 77 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01235 | | DNA-binding transcriptional activator HyfR | cofit | 45 | 50 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS23170 | | ATPase AAA | insig. | 44 | 50 |
| | Rhodospirillum rubrum S1H | Rru_A1385 | | Two Component, Sigma54 Specific, Transcriptional Regulator, Fis family (NCBI) | cofit | 39 | 74 |
| | Pseudomonas sp. SVBP6 | COO64_RS11340 | norR | nitric oxide reductase transcriptional regulator NorR | insig. | 38 | 70 |
| | Serratia liquefaciens MT49 | IAI46_12570 | | formate hydrogenlyase transcriptional activator FlhA | insig. | 37 | 69 |
| | Klebsiella michiganensis M5al | BWI76_RS00385 | | nitrogen assimilation regulatory protein | strong | 37 | 67 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS24790 | | sigma-54 dependent transcriptional regulator | cofit | 37 | 69 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0670 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | insig. | 36 | 69 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_776 | | Two component, Sigma-54 Specific, central transcriptional regulator of acidic amino acid uptake | insig. | 36 | 73 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS34130 | | sigma-54-dependent Fis family transcriptional regulator | insig. | 40 | 64 |
| | Herbaspirillum seropedicae SmR1 | HSERO_RS15680 | | chemotaxis protein CheY | strong | 39 | 67 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS21785 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 38 | 68 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS21785 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 38 | 68 |