| Orth | Species | Gene | Name | Description | Fitness | %Id | Cov |
| | Vibrio cholerae E7946 ATCC 55056 | CSW01_15345 | | XRE family transcriptional regulator | cofit | 100 | 100 |
| o | Dinoroseobacter shibae DFL-12 | Dshi_1555 | | transcriptional regulator, XRE family (RefSeq) | sig. | 59 | 97 |
| o | Phaeobacter inhibens DSM 17395 | PGA1_c14960 | | putative transcriptional regulator | sig. | 56 | 94 |
| | Phaeobacter inhibens DSM 17395 | PGA1_78p00250 | | putative HTH-type transcriptional regulator | insig. | 49 | 86 |
| o | Paraburkholderia sabiae LMG 24235 | QEN71_RS14815 | | XRE family transcriptional regulator | insig. | 49 | 86 |
| o | Burkholderia phytofirmans PsJN | BPHYT_RS33425 | | transcriptional regulator | insig. | 49 | 86 |
| o | Paraburkholderia graminis OAS925 | ABIE53_004924 | | transcriptional regulator with XRE-family HTH domain | sig. | 50 | 87 |
| o | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_03868 | | transcriptional regulator, XRE family with cupin sensor | insig. | 49 | 86 |
| o | Azospirillum brasilense Sp245 | AZOBR_RS27045 | | XRE family transcriptional regulator | insig. | 42 | 92 |
| o | Azospirillum sp. SherDot2 | MPMX19_05211 | | hypothetical protein | insig. | 41 | 86 |
| o | Castellaniella sp019104865 MT123 | ABCV34_RS09100 | | XRE family transcriptional regulator | cofit | 42 | 86 |
| o | Sphingomonas koreensis DSMZ 15582 | Ga0059261_1659 | | transcriptional regulator, XRE family with cupin sensor | insig. | 41 | 86 |
| o | Lysobacter sp. OAE881 | ABIE51_RS15090 | | XRE family transcriptional regulator | cofit | 38 | 86 |
| o | Ralstonia sp. UNC404CL21Col | ABZR87_RS23125 | | XRE family transcriptional regulator | strong | 37 | 86 |
| o | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS16215 | | XRE family transcriptional regulator | cofit | 37 | 94 |
| o | Ralstonia solanacearum UW163 | UW163_RS16950 | | XRE family transcriptional regulator | insig. | 37 | 94 |
| | Sphingomonas koreensis DSMZ 15582 | Ga0059261_1706 | | transcriptional regulator, XRE family with cupin sensor | insig. | 36 | 86 |
| | Paraburkholderia graminis OAS925 | ABIE53_004133 | | transcriptional regulator with XRE-family HTH domain | insig. | 37 | 86 |
| o | Ralstonia solanacearum PSI07 | RPSI07_RS07485 | | XRE family transcriptional regulator | insig. | 36 | 86 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_03162 | | transcriptional regulator, XRE family with cupin sensor | sig. | 36 | 86 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS09590 | | XRE family transcriptional regulator | insig. | 34 | 88 |
| | Variovorax sp. SCN45 | GFF6118 | | Transcriptional regulator, MerR family | insig. | 32 | 86 |
| | Cupriavidus basilensis FW507-4G11 | RR42_RS11200 | | XRE family transcriptional regulator | sig. | 31 | 86 |
| | Variovorax sp. OAS795 | ABID97_RS09230 | | XRE family transcriptional regulator | insig. | 31 | 86 |
| o | Pseudomonas putida KT2440 | PP_2245 | | Transcriptional regulator, Cro/CI family | strong | 31 | 86 |
| o | Pseudomonas sp. BP01 | JOY50_RS25405 | | helix-turn-helix domain-containing protein | insig. | 30 | 86 |
| o | Pseudomonas sp. SVBP6 | COO64_RS09605 | | helix-turn-helix domain-containing protein | insig. | 28 | 88 |
| o | Ralstonia solanacearum GMI1000 | RS_RS05775 | | XRE family transcriptional regulator | insig. | 36 | 85 |
| | Ralstonia solanacearum IBSBF1503 | RALBFv3_RS14960 | | XRE family transcriptional regulator | insig. | 36 | 85 |
| | Ralstonia solanacearum UW163 | UW163_RS12430 | | XRE family transcriptional regulator | no data | 36 | 85 |
| o | Pseudomonas fluorescens FW300-N2C3 | AO356_06745 | | DNA-binding protein | sig. | 32 | 85 |
| o | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_3201 | | Transcriptional regulator, MerR family | strong | 32 | 85 |
| | Ralstonia solanacearum PSI07 | RPSI07_RS18415 | | XRE family transcriptional regulator | insig. | 34 | 85 |
| o | Pseudomonas lactucae CFBP13502 | GEMAOFIL_03889 | | HTH-type transcriptional regulator SutR | insig. | 32 | 85 |
| o | Bacteroides thetaiotaomicron VPI-5482 | BT2783 | | transcriptional regulator (NCBI ptt file) | sig. | 31 | 86 |
| o | Bacteroides ovatus ATCC 8483 | BACOVA_01081 | | hypothetical protein | insig. | 29 | 86 |
| o | Bacteroides stercoris CC31F | HMPREF1181_RS01200 | | helix-turn-helix transcriptional regulator | insig. | 29 | 86 |
| | Variovorax sp. OAS795 | ABID97_RS13245 | | XRE family transcriptional regulator | insig. | 30 | 85 |
| | Pseudomonas sp. BP01 | JOY50_RS09135 | | cupin domain-containing protein | insig. | 27 | 79 |
| o | Pseudomonas orientalis W4I3 | QF045_RS09650 | | XRE family transcriptional regulator | insig. | 32 | 85 |
| | Pseudomonas sp. RS175 | PFR28_00271 | | hypothetical protein | strong | 31 | 80 |
| | Pseudomonas putida KT2440 | PP_5268 | | DNA-binding transcriptional repressor PuuR-putrescine | strong | 27 | 79 |
| | Pseudomonas sp. SVBP6 | COO64_RS14415 | | helix-turn-helix domain-containing protein | cofit | 32 | 85 |
| o | Pseudomonas fluorescens SBW25 | PFLU_RS06955 | | helix-turn-helix domain-containing protein | insig. | 33 | 85 |
| o | Pseudomonas fluorescens SBW25-INTG | PFLU_RS06955 | | helix-turn-helix domain-containing protein | strong | 33 | 85 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS22055 | | DNA-binding protein | strong | 26 | 86 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS18365 | | cupin domain-containing protein | strong | 26 | 86 |
| o | Pseudomonas simiae WCS417 | PS417_06895 | | DNA-binding protein | sig. | 32 | 85 |
| | Xanthobacter sp. DMC5 | GFF295 | | hypothetical protein | insig. | 28 | 78 |
| | Paraburkholderia bryophila 376MFSha3.1 | H281DRAFT_03130 | | transcriptional regulator, XRE family with cupin sensor | insig. | 25 | 86 |
| o | Enterobacter asburiae PDN3 | EX28DRAFT_1500 | | Predicted transcriptional regulators | insig. | 25 | 85 |
| | Sinorhizobium meliloti 1021 | SMc02620 | | hypothetical protein | sig. | 28 | 84 |
| o | Pseudomonas fluorescens GW456-L13 | PfGW456L13_4551 | | Transcriptional regulator, MerR family | insig. | 32 | 85 |
| | Agrobacterium fabrum C58 | Atu4226 | | transcriptional regulator | sig. | 28 | 79 |
| o | Fusobacterium nucleatum SB010 | HUW76_01135 | | cupin domain-containing protein | strong | 26 | 87 |
| o | Methanococcus maripaludis JJ | MMJJ_RS02070 | | XRE family transcriptional regulator | insig. | 29 | 86 |
| | Pseudomonas sp. SVBP6 | COO64_RS01380 | | cupin domain-containing protein | insig. | 25 | 86 |
| o | Pseudomonas aeruginosa PA14 | IKLFDK_24455 | | DNA-binding protein | strong | 32 | 86 |
| | Phaeobacter inhibens DSM 17395 | PGA1_c28440 | | putative transcriptional regulator | insig. | 28 | 86 |
| o | Pseudomonas aeruginosa MRSN321 | DY961_RS27395 | | XRE family transcriptional regulator | strong | 32 | 86 |
| o | Pseudomonas aeruginosa PUPa3 | DQ20_RS31945 | | XRE family transcriptional regulator | strong | 32 | 86 |
| o | Parabacteroides merdae CL09T00C40 | HMPREF1078_RS17570 | | XRE family transcriptional regulator | insig. | 27 | 86 |
| | Pseudomonas fluorescens FW300-N2E3 | AO353_09140 | | XRE family transcriptional regulator | strong | 25 | 79 |
| o | Klebsiella michiganensis M5al | BWI76_RS10700 | | XRE family transcriptional regulator | strong | 25 | 85 |
| | Paraburkholderia graminis OAS925 | ABIE53_004168 | | transcriptional regulator with XRE-family HTH domain | strong | 24 | 86 |
| | Pseudomonas putida KT2440 | PP_3125 | | putative transcriptional regulator (Cro/CI family) | no data | 31 | 85 |
| o | Klebsiella pneumoniae MKP103 | KDGMDA_18340 | | HTH-type transcriptional regulator PuuR | insig. | 24 | 85 |
| o | Pseudomonas segetis P6 | MPMX49_00005 | | HTH-type transcriptional regulator PuuR | strong | 23 | 87 |
| | Paraburkholderia sabiae LMG 24235 | QEN71_RS33920 | | XRE family transcriptional regulator | strong | 31 | 78 |
| | Pseudomonas fluorescens GW456-L13 | PfGW456L13_815 | | Putrescine utilization regulator | strong | 24 | 79 |
| | Pseudomonas sp. BP01 | JOY50_RS21490 | | helix-turn-helix domain-containing protein | no data | 31 | 85 |
| | Pseudomonas sp. RS175 | PFR28_04396 | | HTH-type transcriptional regulator PuuR | strong | 25 | 79 |
| | Burkholderia phytofirmans PsJN | BPHYT_RS07145 | | DNA-binding protein | insig. | 25 | 86 |
| | Pseudomonas fluorescens FW300-N2C3 | AO356_12635 | | XRE family transcriptional regulator | strong | 24 | 79 |
| | Pseudomonas fluorescens FW300-N2E2 | Pf6N2E2_4394 | | Putrescine utilization regulator | strong | 24 | 79 |
| | Pseudomonas fluorescens FW300-N1B4 | Pf1N1B4_2147 | | Putrescine utilization regulator | strong | 24 | 79 |
| | Shewanella loihica PV-4 | Shew_0970 | | XRE family transcriptional regulator (RefSeq) | strong | 24 | 79 |
| | Pseudomonas sp. DMC3 | GFF387 | | HTH-type transcriptional regulator PuuR | cofit | 24 | 79 |
| | Pseudomonas orientalis W4I3 | QF045_RS02040 | | cupin domain-containing protein | cofit | 24 | 79 |
| o | Shewanella sp. ANA-3 | Shewana3_3100 | | XRE family transcriptional regulator (RefSeq) | strong | 23 | 87 |
| | Bacteroides ovatus ATCC 8483 | BACOVA_03586 | | cupin domain protein | strong | 24 | 86 |
| | Pseudomonas fluorescens SBW25 | PFLU_RS29365 | | cupin domain-containing protein | cofit | 24 | 79 |
| | Pseudomonas fluorescens SBW25-INTG | PFLU_RS29365 | | cupin domain-containing protein | strong | 24 | 79 |
| | Pseudomonas lactucae CFBP13502 | GEMAOFIL_00005 | | HTH-type transcriptional regulator PuuR | cofit | 24 | 79 |
| | Pseudomonas simiae WCS417 | PS417_27690 | | XRE family transcriptional regulator | strong | 24 | 79 |
| o | Escherichia coli ECRC100 | OKFHMN_02435 | puuR | HTH-type transcriptional regulator PuuR | cofit | 24 | 83 |
| o | Escherichia coli ECRC101 | MCAODC_15835 | puuR | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli ECRC102 | NIAGMN_26605 | puuR | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli ECRC98 | JDDGAC_04980 | puuR | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli ECRC99 | KEDOAH_26340 | puuR | HTH-type transcriptional regulator PuuR | no data | 24 | 83 |
| o | Escherichia coli BL21 | ECD_01276 | | repressor for the divergent puu operons, putrescine inducible | strong | 24 | 83 |
| o | Escherichia coli ECOR27 | NOLOHH_20120 | puuR | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli ECOR38 | HEPCGN_25765 | puuR | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli ECRC62 | BNILDI_18270 | puuR | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli HS(pFamp)R (ATCC 700891) | OHPLBJKB_02383 | | HTH-type transcriptional regulator PuuR | insig. | 24 | 83 |
| o | Escherichia coli BW25113 | b1299 | puuR | DNA-binding transcriptional repressor (NCBI) | strong | 24 | 83 |
| | Pseudomonas fluorescens GW456-L13 | PfGW456L13_3219 | | Transcriptional regulator, Cro/CI family | insig. | 27 | 87 |
| | Synechococcus elongatus PCC 7942 | Synpcc7942_2038 | | transcriptional regulator, XRE family with cupin sensor domain | strong | 27 | 78 |
| | Pseudomonas putida KT2440 | PP_2868 | | Transcriptional regulator, Cro/CI family | strong | 27 | 92 |
| | Sinorhizobium meliloti 1021 | SMa1076 | | hypothetical protein | insig. | 28 | 78 |