| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_05195 | | sigma-54-dependent Fis family transcriptional regulator | sig. | 100 | 100 |
| o | Shewanella sp. ANA-3 | Shewana3_2016 | | two component, sigma54 specific, Fis family transcriptional regulator (RefSeq) | insig. | 53 | 99 |
| o | Azospirillum brasilense Sp245 | AZOBR_RS01060 | | ATPase AAA | insig. | 55 | 99 |
| o | Azospirillum sp. SherDot2 | MPMX19_02733 | | Regulatory protein LuxO | insig. | 57 | 99 |
| | Azospirillum brasilense Sp245 | AZOBR_RS26130 | | ATPase AAA | insig. | 54 | 98 |
| | Azospirillum sp. SherDot2 | MPMX19_06089 | | Regulatory protein LuxO | insig. | 56 | 98 |
| o | Rhodospirillum rubrum S1H | Rru_A2158 | | Two Component, Sigma54 Specific, Transcriptional Regulator, Fis family (NCBI) | insig. | 53 | 98 |
| | Rhodospirillum rubrum S1H | Rru_A2101 | | Two Component, Sigma54 Specific, Transcriptional Regulator, Fis family (NCBI) | insig. | 52 | 98 |
| o | Dinoroseobacter shibae DFL-12 | Dshi_0823 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | cofit | 48 | 99 |
| o | Methylophilus sp. DMC18 | GFF2815 | | Regulatory protein AtoC | insig. | 42 | 92 |
| | Serratia liquefaciens MT49 | IAI46_24960 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Pectobacterium carotovorum WPP14 | HER17_RS21440 | | nitrogen regulation protein NR(I) | cofit | 40 | 97 |
| | Klebsiella michiganensis M5al | BWI76_RS00385 | | nitrogen assimilation regulatory protein | strong | 40 | 97 |
| o | Hydrogenophaga sp. GW460-11-11-14-LB1 | GFF3635 | | Nitrogen regulation protein NR(I) | insig. | 40 | 98 |
| | Dickeya dadantii 3937 | DDA3937_RS00125 | | nitrogen regulation protein NR(I) | cofit | 40 | 97 |
| | Erwinia amylovora T8 | OLJFJH_05495 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Enterobacter sp. TBS_079 | MPMX20_04597 | | DNA-binding transcriptional regulator NtrC | strong | 39 | 97 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_09000 | | nitrogen regulation protein NR(I) | insig. | 39 | 97 |
| | Enterobacter asburiae PDN3 | EX28DRAFT_4350 | | nitrogen regulation protein NR(I) | insig. | 39 | 97 |
| | Dickeya dianthicola 67-19 | HGI48_RS21235 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Dickeya dianthicola ME23 | DZA65_RS22210 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF2220 | | Nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_0823 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | insig. | 39 | 98 |
| | Rahnella sp. WP5 | EX31_RS15880 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Escherichia coli ECOR27 | NOLOHH_06240 | glnG | nitrogen regulation protein NR(I) | insig. | 40 | 97 |
| | Escherichia coli ECRC100 | OKFHMN_14110 | glnG | nitrogen regulation protein NR(I) | insig. | 40 | 97 |
| | Escherichia coli ECRC101 | MCAODC_04610 | glnG | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Escherichia coli ECRC102 | NIAGMN_11865 | glnG | nitrogen regulation protein NR(I) | insig. | 40 | 97 |
| | Escherichia coli ECRC98 | JDDGAC_17735 | glnG | nitrogen regulation protein NR(I) | no data | 40 | 97 |
| | Escherichia coli ECRC99 | KEDOAH_14040 | glnG | nitrogen regulation protein NR(I) | no data | 40 | 97 |
| | Escherichia coli BW25113 | b3868 | glnG | fused DNA-binding response regulator in two-component regulatory system with GlnL: response regulator/sigma54 interaction protein (NCBI) | strong | 40 | 97 |
| | Escherichia coli BL21 | ECD_03753 | | fused DNA-binding response regulator in two-component regulatory system with GlnL: response regulator/sigma54 interaction protein | insig. | 40 | 97 |
| | Escherichia coli ECRC62 | BNILDI_05290 | glnG | nitrogen regulation protein NR(I) | cofit | 40 | 97 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS22295 | | nitrogen regulation protein NR(I) | strong | 39 | 97 |
| | Escherichia coli BL21 | ECD_03881 | | fused DNA-binding response regulator in two-component regulatory system with ZraS: response regulator/sigma54 interaction protein | insig. | 39 | 97 |
| | Escherichia fergusonii Becca | EFB2_04748 | | DNA-binding transcriptional regulator NtrC | strong | 39 | 97 |
| | Escherichia coli ECOR38 | HEPCGN_11960 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 39 | 97 |
| | Escherichia coli ECOR38 | HEPCGN_12740 | glnG | nitrogen regulation protein NR(I) | insig. | 40 | 97 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_04184 | | DNA-binding transcriptional regulator NtrC | sig. | 40 | 97 |
| | Pantoea sp. MT58 | IAI47_00450 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Escherichia coli BW25113 | b4004 | zraR | fused DNA-binding response regulator in two-component regulatory system with ZraS: response regulator/sigma54 interaction protein (NCBI) | insig. | 39 | 97 |
| | Pantoea agglomerans CFBP13505 P0401 | PagCFBP13505_RS18895 | | nitrogen regulation protein NR(I) | strong | 40 | 97 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS23090 | | sigma-54-dependent response regulator transcription factor ZraR | insig. | 39 | 97 |
| | Escherichia coli ECOR27 | NOLOHH_05465 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 39 | 97 |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_13865 | | nitrogen regulation protein NR(I) | insig. | 38 | 97 |
| | Acinetobacter radioresistens SK82 | MPMX26_01292 | | DNA-binding transcriptional regulator NtrC | strong | 46 | 79 |
| | Escherichia fergusonii Becca | EFB2_04606 | | Transcriptional regulatory protein ZraR | insig. | 39 | 97 |
| | Escherichia fergusonii Becca | EFB2_01635 | | Regulatory protein AtoC | insig. | 38 | 98 |
| | Escherichia coli ECOR38 | HEPCGN_22430 | atoC | acetoacetate metabolism transcriptional regulator AtoC | insig. | 38 | 98 |
| | Escherichia coli Nissle 1917 | ECOLIN_RS12965 | | acetoacetate metabolism transcriptional regulator AtoC | no data | 38 | 98 |
| | Escherichia coli BL21 | ECD_02147 | | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein | insig. | 38 | 98 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_01490 | | Regulatory protein AtoC | insig. | 38 | 98 |
| | Escherichia coli BW25113 | b2220 | atoC | fused response regulator of ato operon, in two-component system with AtoS: response regulator/sigma54 interaction protein (NCBI) | insig. | 38 | 98 |
| | Escherichia coli ECRC62 | BNILDI_06055 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 39 | 97 |
| | Escherichia coli ECRC101 | MCAODC_03820 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 38 | 97 |
| | Escherichia coli ECRC102 | NIAGMN_11070 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 38 | 97 |
| | Escherichia coli ECRC99 | KEDOAH_14840 | zraR | sigma-54-dependent response regulator transcription factor ZraR | no data | 38 | 97 |
| | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_04045 | | Transcriptional regulatory protein ZraR | insig. | 38 | 97 |
| | Klebsiella michiganensis M5al | BWI76_RS01605 | | transcriptional regulatory protein ZraR | insig. | 39 | 97 |
| | Salmonella enterica subsp. enterica serovar Typhimurium str. MS1868 | GFF4188 | | Response regulator of zinc sigma-54-dependent two-component system | insig. | 39 | 97 |
| | Erwinia tracheiphila HP pepo 2.2 | IJEDHG_08285 | glnG | nitrogen regulation protein NR(I) | cofit | 39 | 97 |
| o | Bosea sp. OAE506 | ABIE41_RS06145 | | sigma-54 dependent transcriptional regulator | sig. | 40 | 89 |
| | Erwinia tracheiphila SCR3 | LU632_RS22135 | glnG | nitrogen regulation protein NR(I) | strong | 39 | 97 |
| | Escherichia coli ECRC100 | OKFHMN_13320 | zraR | sigma-54-dependent response regulator transcription factor ZraR | cofit | 38 | 97 |
| | Klebsiella pneumoniae MKP103 | KDGMDA_10090 | | sigma-54-dependent response regulator transcription factor ZraR | insig. | 39 | 97 |
| | Acinetobacter baumannii LAC-4 | RR41_RS08030 | | nitrogen regulation protein NR(I) | insig. | 40 | 93 |
| | Escherichia coli ECRC98 | JDDGAC_16945 | zraR | sigma-54-dependent response regulator transcription factor ZraR | insig. | 38 | 97 |
| o | Ralstonia solanacearum GMI1000 | RS_RS25105 | | sigma-54-dependent Fis family transcriptional regulator | cofit | 37 | 99 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2200 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | no data | 40 | 89 |
| o | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS23315 | | sigma-54-dependent Fis family transcriptional regulator | strong | 38 | 98 |
| o | Ralstonia solanacearum UW163 | UW163_RS16565 | | sigma-54-dependent Fis family transcriptional regulator | strong | 38 | 98 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_16225 | | Fis family transcriptional regulator | insig. | 37 | 97 |
| | Xanthobacter sp. DMC5 | GFF4834 | | Regulatory protein AtoC | insig. | 40 | 89 |
| o | Ralstonia solanacearum PSI07 | RPSI07_RS07835 | | sigma-54-dependent Fis family transcriptional regulator | strong | 37 | 98 |
| | Methylophilus sp. DMC18 | GFF2024 | | DNA-binding transcriptional regulator NtrC | strong | 36 | 97 |
| o | Rhodopseudomonas palustris CGA009 | TX73_021705 | | sigma-54 dependent transcriptional regulator | sig. | 39 | 88 |
| | Brevundimonas sp. GW460-12-10-14-LB2 | A4249_RS09115 | | sigma-54 dependent transcriptional regulator | insig. | 39 | 93 |
| o | Desulfovibrio vulgaris Hildenborough JW710 | DVU0946 | | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | sig. | 37 | 97 |
| | Shewanella loihica PV-4 | Shew_2341 | | two component, sigma54 specific, Fis family transcriptional regulator (RefSeq) | insig. | 37 | 98 |
| | Caulobacter crescentus NA1000 | CCNA_03424 | | AAA-family response regulator tacA | strong | 39 | 90 |
| | Caulobacter crescentus NA1000 Δfur | CCNA_03424 | | AAA-family response regulator tacA | cofit | 39 | 90 |
| | Ralstonia sp. UNC404CL21Col | ABZR87_RS23515 | | sigma-54 dependent transcriptional regulator | strong | 38 | 100 |
| | Pseudomonas aeruginosa MRSN321 | DY961_RS23710 | pilR;inference=COORDINATES | two-component system response regulator PilR | strong | 38 | 97 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_00790 | | two-component response regulator PilR | strong | 38 | 97 |
| | Pseudomonas aeruginosa PUPa3 | DQ20_RS56175 | pilR;inference=COORDINATES | two-component system response regulator PilR | strong | 38 | 97 |
| | Pseudomonas simiae WCS417 | PS417_05525 | | Fis family transcriptional regulator | strong | 36 | 98 |
| | Shewanella amazonensis SB2B | Sama_3427 | | response regulator receiver protein (RefSeq) | strong | 46 | 74 |
| | Pseudomonas stutzeri RCH2 | Psest_3932 | | nitrogen regulation protein NR(I) | strong | 40 | 91 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2394 | ntrC1 | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | sig. | 37 | 98 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU2934 | ntrX | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | no data | 36 | 92 |
| | Pseudomonas aeruginosa MRSN321 | DY961_RS11455 | ntrC;inference=COORDINATES | two-component system response regulator NtrC | strong | 40 | 93 |
| | Pseudomonas aeruginosa PA14 | IKLFDK_27895 | | two-component system response regulator NtrC | insig. | 40 | 93 |
| | Pseudomonas aeruginosa PUPa3 | DQ20_RS50645 | ntrC;inference=COORDINATES | two-component system response regulator NtrC | strong | 40 | 93 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_1461 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | no data | 37 | 92 |
| | Desulfovibrio vulgaris Miyazaki F | DvMF_2149 | | two component, sigma54 specific, transcriptional regulator, Fis family (RefSeq) | strong | 43 | 82 |
| | Shewanella oneidensis MR-1 | SO4472 | ntrC | nitrogen regulation protein NR(I) (NCBI ptt file) | strong | 42 | 89 |
| | Desulfovibrio vulgaris Hildenborough JW710 | DVU3220 | atoC | sigma-54 dependent transcriptional regulator/response regulator (TIGR) | no data | 37 | 98 |
| | Pseudomonas syringae pv. syringae B728a | Psyr_0831 | | Two-component response regulator CbrB | sig. | 41 | 82 |
| | Pseudomonas syringae pv. syringae B728a ΔmexB | Psyr_0831 | | Two-component response regulator CbrB | no data | 41 | 82 |
| | Pseudomonas sp. SVBP6 | COO64_RS13325 | ntrC | nitrogen regulation protein NR(I) | insig. | 41 | 91 |