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Conserved domains on  [gi|505384093|ref|WP_015571195|]
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MULTISPECIES: LysR family transcriptional regulator [Enterobacter cloacae complex]

Protein Classification

LysR family transcriptional regulator( domain architecture ID 10444297)

LysR family transcriptional regulator containing an N-terminal helix-turn-helix DNA-binding domain and a C-terminal substrate binding domain; similar to CbbR, AmpR, GalR, YhaJ, and NmcR, which are positive transcriptional regulators of various genes

Gene Ontology:  GO:0003677|GO:0003700|GO:0001216
PubMed:  8257110|19047729
SCOP:  4000316

Graphical summary

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List of domain hits

Name Accession Description Interval E-value
Periplasmic_Binding_Protein_Type_2 super family cl21456
Type 2 periplasmic binding fold superfamily; This evolutionary model and hierarchy represent ...
92-290 1.29e-67

Type 2 periplasmic binding fold superfamily; This evolutionary model and hierarchy represent the ligand-binding domains found in solute binding proteins that serve as initial receptors in the transport, signal transduction and channel gating. The PBP2 proteins share the same architecture as periplasmic binding proteins type 1 (PBP1), but have a different topology. They are typically comprised of two globular subdomains connected by a flexible hinge and bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. The origin of PBP module can be traced across the distant phyla, including eukaryotes, archebacteria, and prokaryotes. The majority of PBP2 proteins are involved in the uptake of a variety of soluble substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the family includes ionotropic glutamate receptors and unorthodox sensor proteins involved in signal transduction. The substrate binding domain of the LysR transcriptional regulators and the oligopeptide-like transport systems also contain the type 2 periplasmic binding fold and thus they are significantly homologous to that of the PBP2; however, these two families are grouped into a separate hierarchy of the PBP2 superfamily due to the large number of protein sequences.


The actual alignment was detected with superfamily member cd08451:

Pssm-ID: 473866 [Multi-domain]  Cd Length: 199  Bit Score: 208.96  E-value: 1.29e-67
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDREPMVVAL 171
Cdd:cd08451    1 RLRVGFTSSAAFHPLVPGLIRRFREAYPDVELTLEEANTAELLEALREGRLDAAFVRPPVARSDGLVLELLLEEPMLVAL 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAI 251
Cdd:cd08451   81 PAGHPLARERSIPLAALADEPFILFPRPVGPGLYDAIIAACRRAGFTPRIGQEAPQMASAINLVAAGLGVSIVPASMRQL 160
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 252 SPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08451  161 QAPGVVYRPLAGAPLTAPLALAYRRGERSPAVRNFIALV 199
HTH_1 pfam00126
Bacterial regulatory helix-turn-helix protein, lysR family;
3-62 1.54e-27

Bacterial regulatory helix-turn-helix protein, lysR family;


:

Pssm-ID: 459683 [Multi-domain]  Cd Length: 60  Bit Score: 101.31  E-value: 1.54e-27
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093    3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGE 62
Cdd:pfam00126   1 LRQLRLFVAVAETGSFTAAAERLGLSQPAVSRQIKRLEEELGVPLFERTTRGVRLTEAGE 60
 
Name Accession Description Interval E-value
PBP2_BudR cd08451
The C-terminal substrate binding domain of LysR-type transcrptional regulator BudR, which is ...
92-290 1.29e-67

The C-terminal substrate binding domain of LysR-type transcrptional regulator BudR, which is responsible for activation of the expression of the butanediol operon genes; contains the type 2 periplasmic binding fold; This CD represents the substrate binding domain of BudR regulator, which is responsible for induction of the butanediol formation pathway under fermentative growth conditions. Three enzymes are involved in the production of 1 mol of 2,3 butanediol from the condensation of 2 mol of pyruvate with acetolactate and acetoin as intermediates: acetolactate synthetase, acetolactate decarboxylase, and acetoin reductase. In Klebsiella terrigena, BudR regulates the expression of the budABC operon genes, encoding these three enzymes of the butanediol pathway. In many bacterial species, the use of this pathway can prevent intracellular acidification by diverting metabolism from acid production to the formation of neutral compounds (acetoin and butanediol). This substrate-binding domain has significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176142 [Multi-domain]  Cd Length: 199  Bit Score: 208.96  E-value: 1.29e-67
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDREPMVVAL 171
Cdd:cd08451    1 RLRVGFTSSAAFHPLVPGLIRRFREAYPDVELTLEEANTAELLEALREGRLDAAFVRPPVARSDGLVLELLLEEPMLVAL 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAI 251
Cdd:cd08451   81 PAGHPLARERSIPLAALADEPFILFPRPVGPGLYDAIIAACRRAGFTPRIGQEAPQMASAINLVAAGLGVSIVPASMRQL 160
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 252 SPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08451  161 QAPGVVYRPLAGAPLTAPLALAYRRGERSPAVRNFIALV 199
LysR COG0583
DNA-binding transcriptional regulator, LysR family [Transcription];
1-293 1.85e-59

DNA-binding transcriptional regulator, LysR family [Transcription];


Pssm-ID: 440348 [Multi-domain]  Cd Length: 256  Bit Score: 190.08  E-value: 1.85e-59
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:COG0583    1 MDLRQLRAFVAVAEEGSFTAAAERLGVSQPAVSRQIRRLEEELGVPLFERTGRGLRLTEAGERLLERARRILAELEEAEA 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARGIARGLNGSLSIGITSSDAFHPkIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELK 160
Cdd:COG0583   81 ELRALRGGPRGTLRIGAPPSLARYL-LPPLLARFRARHPGVRLELREGNSDRLVDALLEGELDLAIRLGPPPDPGLVARP 159
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 161 ILdREPMVVALHRDHPLAACGDLAldelRDTPVVLfpqevapglydrvygsceragidmqhtlqssqlssslSMVSAGGG 240
Cdd:COG0583  160 LG-EERLVLVASPDHPLARRAPLV----NSLEALL-------------------------------------AAVAAGLG 197
                        250       260       270       280       290
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 505384093 241 FALVPKSMAA--ISPPNVTYHALRSPELYTDIALCWR-RFERSRTVKRFLAMMSEE 293
Cdd:COG0583  198 IALLPRFLAAdeLAAGRLVALPLPDPPPPRPLYLVWRrRRHLSPAVRAFLDFLREA 253
PRK09986 PRK09986
LysR family transcriptional regulator;
3-290 7.08e-49

LysR family transcriptional regulator;


Pssm-ID: 182183 [Multi-domain]  Cd Length: 294  Bit Score: 164.13  E-value: 7.08e-49
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKA 82
Cdd:PRK09986   9 LKLLRYFLAVAEELHFGRAAARLNISQPPLSIHIKELEDQLGTPLFIRHSRSVVLTHAGKILMEESRRLLDNAEQSLARV 88
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  83 RGIARGLNGSLSIGITSSDAFHpKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVR-LPCESSKVFELKI 161
Cdd:PRK09986  89 EQIGRGEAGRIEIGIVGTALWG-RLRPAMRHFLKENPNVEWLLRELSPSMQMAALERRELDAGIWRmADLEPNPGFTSRR 167
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 162 LDREPMVVALHRDHPLAACGDLALDELRDTPVVLFPqEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGF 241
Cdd:PRK09986 168 LHESAFAVAVPEEHPLASRSSVPLKALRNEYFITLP-FVHSDWGKFLQRVCQQAGFSPQIIRQVNEPQTVLAMVSMGIGI 246
                        250       260       270       280
                 ....*....|....*....|....*....|....*....|....*....
gi 505384093 242 ALVPKSMAAISPPNVTYHALRSPeLYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:PRK09986 247 TLLPDSYAQIPWPGVVFRPLKER-IPADLYAVYHPDQVTPALNKLLAAL 294
LysR_substrate pfam03466
LysR substrate binding domain; The structure of this domain is known and is similar to the ...
91-293 1.43e-27

LysR substrate binding domain; The structure of this domain is known and is similar to the periplasmic binding proteins. This domain binds a variety of ligands that caries in size and structure, such as amino acids, sugar phosphates, organic acids, metal cations, flavonoids, C6-ring carboxylic acids, H2O2, HOCl, homocysteine, NADPH, ATP, sulphate, muropeptides, acetate, salicylate, citrate, phenol- and quinolone derivatives, acetylserines, fatty acid CoA, shikimate, chorismate, homocysteine, indole-3-acetic acid, Na(I), c-di-GMP, ppGpp and hydrogen peroxide (Matilla et. al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).


Pssm-ID: 460931 [Multi-domain]  Cd Length: 205  Bit Score: 105.83  E-value: 1.43e-27
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   91 GSLSIGITSSDAFHPkIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKvFELKILDREPMVVA 170
Cdd:pfam03466   2 GRLRIGAPPTLASYL-LPPLLARFRERYPDVELELTEGNSEELLDLLLEGELDLAIRRGPPDDPG-LEARPLGEEPLVLV 79
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  171 LHRDHPLAACGDLALDELRDTPVVLFPQEvaPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAA 250
Cdd:pfam03466  80 APPDHPLARGEPVSLEDLADEPLILLPPG--SGLRDLLDRALRAAGLRPRVVLEVNSLEALLQLVAAGLGIALLPRSAVA 157
                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*.
gi 505384093  251 --ISPPNVTYHALRSPELYTDIALCWRR-FERSRTVKRFLAMMSEE 293
Cdd:pfam03466 158 reLADGRLVALPLPEPPLPRELYLVWRKgRPLSPAVRAFIEFLREA 203
HTH_1 pfam00126
Bacterial regulatory helix-turn-helix protein, lysR family;
3-62 1.54e-27

Bacterial regulatory helix-turn-helix protein, lysR family;


Pssm-ID: 459683 [Multi-domain]  Cd Length: 60  Bit Score: 101.31  E-value: 1.54e-27
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093    3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGE 62
Cdd:pfam00126   1 LRQLRLFVAVAETGSFTAAAERLGLSQPAVSRQIKRLEEELGVPLFERTTRGVRLTEAGE 60
PRK11139 PRK11139
DNA-binding transcriptional activator GcvA; Provisional
6-114 2.14e-19

DNA-binding transcriptional activator GcvA; Provisional


Pssm-ID: 182990 [Multi-domain]  Cd Length: 297  Bit Score: 86.05  E-value: 2.14e-19
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKARgi 85
Cdd:PRK11139  11 LRAFEAAARHLSFTRAAEELFVTQAAVSHQIKALEDFLGLKLFRRRNRSLLLTEEGQRYFLDIREIFDQLAEATRKLR-- 88
                         90       100       110
                 ....*....|....*....|....*....|..
gi 505384093  86 ARGLNGSLSIGITSSDAFH---PKIFALIRQF 114
Cdd:PRK11139  89 ARSAKGALTVSLLPSFAIQwlvPRLSSFNEAH 120
 
Name Accession Description Interval E-value
PBP2_BudR cd08451
The C-terminal substrate binding domain of LysR-type transcrptional regulator BudR, which is ...
92-290 1.29e-67

The C-terminal substrate binding domain of LysR-type transcrptional regulator BudR, which is responsible for activation of the expression of the butanediol operon genes; contains the type 2 periplasmic binding fold; This CD represents the substrate binding domain of BudR regulator, which is responsible for induction of the butanediol formation pathway under fermentative growth conditions. Three enzymes are involved in the production of 1 mol of 2,3 butanediol from the condensation of 2 mol of pyruvate with acetolactate and acetoin as intermediates: acetolactate synthetase, acetolactate decarboxylase, and acetoin reductase. In Klebsiella terrigena, BudR regulates the expression of the budABC operon genes, encoding these three enzymes of the butanediol pathway. In many bacterial species, the use of this pathway can prevent intracellular acidification by diverting metabolism from acid production to the formation of neutral compounds (acetoin and butanediol). This substrate-binding domain has significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176142 [Multi-domain]  Cd Length: 199  Bit Score: 208.96  E-value: 1.29e-67
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDREPMVVAL 171
Cdd:cd08451    1 RLRVGFTSSAAFHPLVPGLIRRFREAYPDVELTLEEANTAELLEALREGRLDAAFVRPPVARSDGLVLELLLEEPMLVAL 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAI 251
Cdd:cd08451   81 PAGHPLARERSIPLAALADEPFILFPRPVGPGLYDAIIAACRRAGFTPRIGQEAPQMASAINLVAAGLGVSIVPASMRQL 160
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 252 SPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08451  161 QAPGVVYRPLAGAPLTAPLALAYRRGERSPAVRNFIALV 199
LysR COG0583
DNA-binding transcriptional regulator, LysR family [Transcription];
1-293 1.85e-59

DNA-binding transcriptional regulator, LysR family [Transcription];


Pssm-ID: 440348 [Multi-domain]  Cd Length: 256  Bit Score: 190.08  E-value: 1.85e-59
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:COG0583    1 MDLRQLRAFVAVAEEGSFTAAAERLGVSQPAVSRQIRRLEEELGVPLFERTGRGLRLTEAGERLLERARRILAELEEAEA 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARGIARGLNGSLSIGITSSDAFHPkIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELK 160
Cdd:COG0583   81 ELRALRGGPRGTLRIGAPPSLARYL-LPPLLARFRARHPGVRLELREGNSDRLVDALLEGELDLAIRLGPPPDPGLVARP 159
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 161 ILdREPMVVALHRDHPLAACGDLAldelRDTPVVLfpqevapglydrvygsceragidmqhtlqssqlssslSMVSAGGG 240
Cdd:COG0583  160 LG-EERLVLVASPDHPLARRAPLV----NSLEALL-------------------------------------AAVAAGLG 197
                        250       260       270       280       290
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 505384093 241 FALVPKSMAA--ISPPNVTYHALRSPELYTDIALCWR-RFERSRTVKRFLAMMSEE 293
Cdd:COG0583  198 IALLPRFLAAdeLAAGRLVALPLPDPPPPRPLYLVWRrRRHLSPAVRAFLDFLREA 253
PBP2_LTTR_aromatics_like cd08414
The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ...
92-290 2.23e-50

The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in the catabolism of aromatic compounds and that of other related regulators, contains type 2 periplasmic binding fold; This CD includes the C-terminal substrate binding domain of LTTRs involved in degradation of aromatic compounds, such as CbnR, BenM, CatM, ClcR and TfdR, as well as that of other transcriptional regulators clustered together in phylogenetic trees, including XapR, HcaR, MprR, IlvR, BudR, AlsR, LysR, and OccR. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate-binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction.


Pssm-ID: 176106 [Multi-domain]  Cd Length: 197  Bit Score: 164.99  E-value: 2.23e-50
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSdAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVfELKILDREPMVVAL 171
Cdd:cd08414    1 RLRIGFVGS-ALYGLLPRLLRRFRARYPDVELELREMTTAEQLEALRAGRLDVGFVRPPPDPPGL-ASRPLLREPLVVAL 78
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAI 251
Cdd:cd08414   79 PADHPLAARESVSLADLADEPFVLFPREPGPGLYDQILALCRRAGFTPRIVQEASDLQTLLALVAAGLGVALVPASVARL 158
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 252 SPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08414  159 QRPGVVYRPLADPPPRSELALAWRRDNASPALRAFLELA 197
PRK09986 PRK09986
LysR family transcriptional regulator;
3-290 7.08e-49

LysR family transcriptional regulator;


Pssm-ID: 182183 [Multi-domain]  Cd Length: 294  Bit Score: 164.13  E-value: 7.08e-49
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKA 82
Cdd:PRK09986   9 LKLLRYFLAVAEELHFGRAAARLNISQPPLSIHIKELEDQLGTPLFIRHSRSVVLTHAGKILMEESRRLLDNAEQSLARV 88
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  83 RGIARGLNGSLSIGITSSDAFHpKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVR-LPCESSKVFELKI 161
Cdd:PRK09986  89 EQIGRGEAGRIEIGIVGTALWG-RLRPAMRHFLKENPNVEWLLRELSPSMQMAALERRELDAGIWRmADLEPNPGFTSRR 167
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 162 LDREPMVVALHRDHPLAACGDLALDELRDTPVVLFPqEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGF 241
Cdd:PRK09986 168 LHESAFAVAVPEEHPLASRSSVPLKALRNEYFITLP-FVHSDWGKFLQRVCQQAGFSPQIIRQVNEPQTVLAMVSMGIGI 246
                        250       260       270       280
                 ....*....|....*....|....*....|....*....|....*....
gi 505384093 242 ALVPKSMAAISPPNVTYHALRSPeLYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:PRK09986 247 TLLPDSYAQIPWPGVVFRPLKER-IPADLYAVYHPDQVTPALNKLLAAL 294
PRK09906 PRK09906
DNA-binding transcriptional regulator HcaR; Provisional
1-292 1.94e-45

DNA-binding transcriptional regulator HcaR; Provisional


Pssm-ID: 182137 [Multi-domain]  Cd Length: 296  Bit Score: 155.31  E-value: 1.94e-45
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:PRK09906   1 MELRHLRYFVAVAEELNFTKAAEKLHTAQPSLSQQIKDLENCVGVPLLVRDKRKVALTAAGEVFLQDARAILEQAEKAKL 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARGIARGlNGSLSIGITSSDAFhpKIFA-LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFEL 159
Cdd:PRK09906  81 RARKIVQE-DRQLTIGFVPSAEV--NLLPkVLPMFRLRHPDTLIELVSLITTQQEEKLRRGELDVGFMRHPVYSDEIDYL 157
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 160 KILDrEPMVVALHRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGG 239
Cdd:PRK09906 158 ELLD-EPLVVVLPVDHPLAHEKEITAAQLDGVNFISTDPAYSGSLAPIIKAWFAQHNSQPNIVQVATNILVTMNLVGMGL 236
                        250       260       270       280       290
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 505384093 240 GFALVPKSMAAISPPNVTYHAL--RSPELytDIALCWRRFERSRTVKRFLAMMSE 292
Cdd:PRK09906 237 GCTIIPGYMNNFNTGQVVFRPLagNVPSI--ALLMAWKKGEMKPALRDFIAIVQE 289
PRK11151 PRK11151
DNA-binding transcriptional regulator OxyR; Provisional
1-279 1.17e-34

DNA-binding transcriptional regulator OxyR; Provisional


Pssm-ID: 182999 [Multi-domain]  Cd Length: 305  Bit Score: 127.45  E-value: 1.17e-34
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:PRK11151   1 MNIRDLEYLVALAEHRHFRRAADSCHVSQPTLSGQIRKLEDELGVMLLERTSRKVLFTQAGLLLVDQARTVLREVKVLKE 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARGIARGLNGSLSIGI--TSSDAFHPKIF-ALIRQFQVQNMAVQvhqvEANMSSLTTMLAEGELDIAFVRLPCESSKVF 157
Cdd:PRK11151  81 MASQQGETMSGPLHIGLipTVGPYLLPHIIpMLHQTFPKLEMYLH----EAQTHQLLAQLDSGKLDCAILALVKESEAFI 156
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 158 ELKILDrEPMVVALHRDHPLAACGDLALDELRDTPVVLFpqEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSA 237
Cdd:PRK11151 157 EVPLFD-EPMLLAVYEDHPWANRDRVPMSDLAGEKLLML--EDGHCLRDQAMGFCFEAGADEDTHFRATSLETLRNMVAA 233
                        250       260       270       280       290
                 ....*....|....*....|....*....|....*....|....*....|....*
gi 505384093 238 GGGFALVPksmaAISPPN------VTYHALRSPELYTDIALCWR-------RFER 279
Cdd:PRK11151 234 GSGITLLP----ALAVPNerkrdgVCYLPCIKPEPRRTIGLVYRpgsplrsRYEQ 284
PRK11242 PRK11242
DNA-binding transcriptional regulator CynR; Provisional
1-201 4.14e-33

DNA-binding transcriptional regulator CynR; Provisional


Pssm-ID: 183051 [Multi-domain]  Cd Length: 296  Bit Score: 123.14  E-value: 4.14e-33
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDAckILALSDaaLE 80
Cdd:PRK11242   1 MLLRHIRYFLAVAEHGNFTRAAEALHVSQPTLSQQIRQLEESLGVQLFDRSGRTVRLTDAGEVYLRYA--RRALQD--LE 76
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARgiaRGLN-------GSLSIGITSS----------DAFH---PKIFALIRqfqvqnmavqvhqvEANMSSLTTMLAEG 140
Cdd:PRK11242  77 AGR---RAIHdvadlsrGSLRLAMTPTftayligpliDAFHaryPGITLTIR--------------EMSQERIEALLADD 139
                        170       180       190       200       210       220
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*..
gi 505384093 141 ELD--IAF--VRLP-CESSKVFElkildrEPMVVALHRDHPLAACGD-LALDELRDTPVVLFPQEVA 201
Cdd:PRK11242 140 ELDvgIAFapVHSPeIEAQPLFT------ETLALVVGRHHPLAARRKaLTLDELADEPLVLLSAEFA 200
PBP2_LTTR_substrate cd05466
The substrate binding domain of LysR-type transcriptional regulators (LTTRs), a member of the ...
92-290 1.26e-29

The substrate binding domain of LysR-type transcriptional regulators (LTTRs), a member of the type 2 periplasmic binding fold protein superfamily; This model and hierarchy represent the the substrate-binding domain of the LysR-type transcriptional regulators that form the largest family of prokaryotic transcription factor. Homologs of some of LTTRs with similar domain organizations are also found in the archaea and eukaryotic organisms. The LTTRs are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, oxidative stress responses, nodule formation of nitrogen-fixing bacteria, synthesis of virulence factors, toxin production, attachment and secretion, to name a few. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate-binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction.


Pssm-ID: 176102 [Multi-domain]  Cd Length: 197  Bit Score: 111.15  E-value: 1.26e-29
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFHpkIFA-LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKvFELKILDREPMVVA 170
Cdd:cd05466    1 TLRIGASPSIAAY--LLPpLLAAFRQRYPGVELSLVEGGSSELLEALLEGELDLAIVALPVDDPG-LESEPLFEEPLVLV 77
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 171 LHRDHPLAACGDLALDELRDTPVVLFPQEvaPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAA 250
Cdd:cd05466   78 VPPDHPLAKRKSVTLADLADEPLILFERG--SGLRRLLDRAFAEAGFTPNIALEVDSLEAIKALVAAGLGIALLPESAVE 155
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|..
gi 505384093 251 -ISPPNVTYHALRSPELYTDIALCWRRFER-SRTVKRFLAMM 290
Cdd:cd05466  156 eLADGGLVVLPLEDPPLSRTIGLVWRKGRYlSPAARAFLELL 197
PBP2_LTTR_aromatics_like_2 cd08448
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
92-290 2.11e-29

The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator similar to regulators involved in the catabolism of aromatic compounds, contains type 2 periplasmic binding fold; This CD represents the substrate binding domain of an uncharacterized LysR-type regulator similar to CbnR which is involved in the regulation of chlorocatechol breakdown. The transcription of the genes encoding enzymes involved in such degradation is regulated and expression of these enzymes is enhanced by inducers, which are either an intermediate in the metabolic pathway or compounds to be degraded. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176139 [Multi-domain]  Cd Length: 197  Bit Score: 110.43  E-value: 2.11e-29
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFHPkIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFV---RLPCESSKVfelkILDREPMV 168
Cdd:cd08448    1 RLRIGFVGSMLYRG-LPRILRAFRAEYPGIEVALHEMSSAEQIEALLRGELDLGFVhsrRLPAGLSAR----LLHREPFV 75
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 169 VALHRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGI--DMQHTlqSSQLSSSLSMVSAGGGFALVPK 246
Cdd:cd08448   76 CCLPAGHPLAARRRIDLRELAGEPFVLFSREVSPDYYDQIIALCMDAGFhpKIRHE--VRHWLTVVALVAAGMGVALVPR 153
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....
gi 505384093 247 SMAAISPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08448  154 SLARAGLAGVRFLPLKGATQRSELYAAWKASAPNPALQAFLAAL 197
LysR_substrate pfam03466
LysR substrate binding domain; The structure of this domain is known and is similar to the ...
91-293 1.43e-27

LysR substrate binding domain; The structure of this domain is known and is similar to the periplasmic binding proteins. This domain binds a variety of ligands that caries in size and structure, such as amino acids, sugar phosphates, organic acids, metal cations, flavonoids, C6-ring carboxylic acids, H2O2, HOCl, homocysteine, NADPH, ATP, sulphate, muropeptides, acetate, salicylate, citrate, phenol- and quinolone derivatives, acetylserines, fatty acid CoA, shikimate, chorismate, homocysteine, indole-3-acetic acid, Na(I), c-di-GMP, ppGpp and hydrogen peroxide (Matilla et. al., FEMS Microbiology Reviews, fuab043, 45, 2021, 1. https://doi.org/10.1093/femsre/fuab043).


Pssm-ID: 460931 [Multi-domain]  Cd Length: 205  Bit Score: 105.83  E-value: 1.43e-27
                          10        20        30        40        50        60        70        80
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   91 GSLSIGITSSDAFHPkIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKvFELKILDREPMVVA 170
Cdd:pfam03466   2 GRLRIGAPPTLASYL-LPPLLARFRERYPDVELELTEGNSEELLDLLLEGELDLAIRRGPPDDPG-LEARPLGEEPLVLV 79
                          90       100       110       120       130       140       150       160
                  ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  171 LHRDHPLAACGDLALDELRDTPVVLFPQEvaPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAA 250
Cdd:pfam03466  80 APPDHPLARGEPVSLEDLADEPLILLPPG--SGLRDLLDRALRAAGLRPRVVLEVNSLEALLQLVAAGLGIALLPRSAVA 157
                         170       180       190       200
                  ....*....|....*....|....*....|....*....|....*.
gi 505384093  251 --ISPPNVTYHALRSPELYTDIALCWRR-FERSRTVKRFLAMMSEE 293
Cdd:pfam03466 158 reLADGRLVALPLPEPPLPRELYLVWRKgRPLSPAVRAFIEFLREA 203
HTH_1 pfam00126
Bacterial regulatory helix-turn-helix protein, lysR family;
3-62 1.54e-27

Bacterial regulatory helix-turn-helix protein, lysR family;


Pssm-ID: 459683 [Multi-domain]  Cd Length: 60  Bit Score: 101.31  E-value: 1.54e-27
                          10        20        30        40        50        60
                  ....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093    3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGE 62
Cdd:pfam00126   1 LRQLRLFVAVAETGSFTAAAERLGLSQPAVSRQIKRLEEELGVPLFERTTRGVRLTEAGE 60
PBP2_Chlorocatechol cd08446
The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ...
91-288 2.38e-26

The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in the chlorocatechol catabolism, contains the type 2 periplasmic binding fold; This CD includes the substrate binding domain of LysR-type regulators CbnR, ClcR and TfdR, which are involved in the regulation of chlorocatechol breakdown. The chlorocatechol-degradative pathway is often found in bacteria that can use chlorinated aromatic compounds as carbon and energy sources. CbnR is found in the 3-chlorobenzoate degradative bacterium Ralstonia eutropha NH9 and forms a tetramer. CbnR activates the expression of the cbnABCD genes, which are responsible for the degradation of chlorocatechol converted from 3-chlorobenzoate and are transcribed divergently from cbnR. In soil bacterium Pseudomonas putida, the 3-chlorocatechol-degradative pathway is encoded by clcABD operon, which requires the divergently transcribed clcR for activation. TfdR is involved in the activation of tfdA and tfdB gene expression. These genes encode enzymes for the conversion of 2,4-dichlorophenoxyacetic acid and 2,4-dichlorophenol. The topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176137 [Multi-domain]  Cd Length: 198  Bit Score: 102.36  E-value: 2.38e-26
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  91 GSLSIGITSSDAFHpKIFALIRQFQVQNMAVQVhqveanmsSLTTM--------LAEGELDIAFVRL-PCESSKVFELki 161
Cdd:cd08446    1 GELDVGYFGSAILD-TVPRLLRAFLTARPDVTV--------SLHNMtkdeqieaLRAGRIHIGFGRFyPVEPDIAVEN-- 69
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 162 LDREPMVVALHRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGF 241
Cdd:cd08446   70 VAQERLYLAVPKSHPLAARPAVSLADLRNEPLILFPRGGRPSFADEVLGLFRRAGVEPRVAQEVEDVVAALALVAAGFGV 149
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*..
gi 505384093 242 ALVPKSMAAISPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLA 288
Cdd:cd08446  150 CIVPESVAALRWPGVVFRPLADAEAKVPLSCIYRKDDRSPILRAFLD 196
rbcR CHL00180
LysR transcriptional regulator; Provisional
3-188 1.23e-24

LysR transcriptional regulator; Provisional


Pssm-ID: 177082 [Multi-domain]  Cd Length: 305  Bit Score: 100.48  E-value: 1.23e-24
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILAL---SDAAL 79
Cdd:CHL00180   7 LDQLRILKAIATEGSFKKAAESLYISQPAVSLQIKNLEKQLNIPLFDRSKNKASLTEAGELLLRYGNRILALceeTCRAL 86
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  80 EKARGIARglnGSLSIGI--TSSDAFHPKIFALIRQFQVQ-NMAVQVHQVEanmsSLTTMLAEGELDIAFV--RLPCESS 154
Cdd:CHL00180  87 EDLKNLQR---GTLIIGAsqTTGTYLMPRLIGLFRQRYPQiNVQLQVHSTR----RIAWNVANGQIDIAIVggEVPTELK 159
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 155 kvfelKILDREPMV-----VALHRDHPLAACGDLALDEL 188
Cdd:CHL00180 160 -----KILEITPYVedelaLIIPKSHPFAKLKKIQKEDL 193
PRK09791 PRK09791
LysR family transcriptional regulator;
1-190 3.10e-23

LysR family transcriptional regulator;


Pssm-ID: 182077 [Multi-domain]  Cd Length: 302  Bit Score: 96.75  E-value: 3.10e-23
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:PRK09791   5 VKIHQIRAFVEVARQGSIRGASRMLNMSQPALTKSIQELEEGLAAQLFFRRSKGVTLTDAGESFYQHASLILEELRAAQE 84
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARGIARGLNGSLSIGITSSDAfHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDI---AFVRLPCESSKVF 157
Cdd:PRK09791  85 DIRQRQGQLAGQINIGMGASIA-RSLMPAVISRFHQQHPQVKVRIMEGQLVSMINELRQGELDFtinTYYQGPYDHEFTF 163
                        170       180       190
                 ....*....|....*....|....*....|...
gi 505384093 158 ElKILDREPMVVAlHRDHPLAacGDLALDELRD 190
Cdd:PRK09791 164 E-KLLEKQFAVFC-RPGHPAI--GARSLKQLLD 192
PBP2_XapR cd08449
The C-terminal substrate binding domain of LysR-type transcriptional regulator XapR involved ...
93-290 4.13e-22

The C-terminal substrate binding domain of LysR-type transcriptional regulator XapR involved in xanthosine catabolism, contains the type 2 periplasmic binding fold; In Escherichia coli, XapR is a positive regulator for the expression of xapA gene, encoding xanthosine phosphorylase, and xapB gene, encoding a polypeptide similar to the nucleotide transport protein NupG. As an operon, the expression of both xapA and xapB is fully dependent on the presence of both XapR and the inducer xanthosine. Expression of the xapR is constitutive but not auto-regulated, unlike many other LysR family proteins. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176140 [Multi-domain]  Cd Length: 197  Bit Score: 91.18  E-value: 4.13e-22
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  93 LSIGITSSdAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKV-FELKILDREPMVVAL 171
Cdd:cd08449    2 LNIGMVGS-VLWGGLGPALRRFKRQYPNVTVRFHELSPEAQKAALLSKRIDLGFVRFADTLNDPpLASELLWREPMVVAL 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVApGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAI 251
Cdd:cd08449   81 PEEHPLAGRKSLTLADLRDEPFVFLRLANS-RFADFLINCCLQAGFTPQITQEVVEPQTLMALVAAGFGVALVPESYARL 159
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 252 SPPNVTYHALRsPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08449  160 PWPGVRFIPLK-QAISADLYAVYHPDSATPVIQAFLALL 197
PBP2_CidR cd08438
The C-terminal substrate binding domain of LysR-like transcriptional regulator CidR, contains ...
107-290 3.57e-21

The C-terminal substrate binding domain of LysR-like transcriptional regulator CidR, contains the type 2 periplasmic binding fold; This CD includes the substrate binding domain of CidR which positively up-regulates the expression of cidABC operon in the presence of acetic acid produced by the metabolism of excess glucose. The CidR affects the control of murein hydrolase activity by enhancing cidABC expression in the presence of acetic acid. Thus, up-regulation of cidABC expression results in increased murein hydrolase activity. This substrate binding domain has significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176129 [Multi-domain]  Cd Length: 197  Bit Score: 88.77  E-value: 3.57e-21
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 107 IFA-LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKvFELKILDREPMVVALHRDHPLAACGDLAL 185
Cdd:cd08438   14 LFApLLAAFRQRYPNIELELVEYGGKKVEQAVLNGELDVGITVLPVDEEE-FDSQPLCNEPLVAVLPRGHPLAGRKTVSL 92
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 186 DELRDTPVVLFPQEVApgLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAA-ISPPNVTYHALRSP 264
Cdd:cd08438   93 ADLADEPFILFNEDFA--LHDRIIDACQQAGFTPNIAARSSQWDFIAELVAAGLGVALLPRSIAQrLDNAGVKVIPLTDP 170
                        170       180
                 ....*....|....*....|....*...
gi 505384093 265 ELYTDIALCWRRfER--SRTVKRFLAMM 290
Cdd:cd08438  171 DLRWQLALIWRK-GRylSHAARAWLALL 197
PBP2_GltC_like cd08434
The substrate binding domain of LysR-type transcriptional regulator GltC, which activates gltA ...
110-288 4.35e-21

The substrate binding domain of LysR-type transcriptional regulator GltC, which activates gltA expression of glutamate synthase operon, contains type 2 periplasmic binding fold; GltC, a member of the LysR family of bacterial transcriptional factors, activates the expression of gltA gene of glutamate synthase operon and is essential for cell growth in the absence of glutamate. Glutamate synthase is a heterodimeric protein that encoded by gltA and gltB, whose expression is subject to nutritional regulation. GltC also negatively auto-regulates its own expression. This substrate-binding domain has strong homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176125 [Multi-domain]  Cd Length: 195  Bit Score: 88.36  E-value: 4.35e-21
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 110 LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVfELKILDREPMVVALHRDHPLAACGDLALDELR 189
Cdd:cd08434   18 LIRAFRKEYPNVTFELHQGSTDELLDDLKNGELDLALCSPVPDEPDI-EWIPLFTEELVLVVPKDHPLAGRDSVDLAELA 96
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 190 DTPVVLFPQEVapGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKsMAAISPPNVTYHALRSPELYTD 269
Cdd:cd08434   97 DEPFVLLSPGF--GLRPIVDELCAAAGFTPKIAFEGEEDSTIAGLVAAGLGVAILPE-MTLLNPPGVKKIPIKDPDAERT 173
                        170       180
                 ....*....|....*....|.
gi 505384093 270 IALCWR--RFeRSRTVKRFLA 288
Cdd:cd08434  174 IGLAWLkdRY-LSPAARRFKD 193
PBP2_IlvR cd08453
The C-terminal substrate binding domain of LysR-type transcriptional regulator, IlvR, involved ...
109-288 4.42e-21

The C-terminal substrate binding domain of LysR-type transcriptional regulator, IlvR, involved in the biosynthesis of isoleucine, leucine and valine; contains type 2 periplasmic binding fold; The IlvR is an activator of the upstream and divergently transcribed ilvD gene, which encodes dihydroxy acid dehydratase that participates in isoleucine, leucine, and valine biosynthesis. As in the case of other members of the LysR family, the expression of ilvR gene is repressed in the presence of its own gene product. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176144 [Multi-domain]  Cd Length: 200  Bit Score: 88.57  E-value: 4.42e-21
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 109 ALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVrLPCESSKV---FELKILDREPMVVALHRDHPLAACGDLAL 185
Cdd:cd08453   17 ELVRRFREAYPDVELQLREATSDVQLEALLAGEIDAGIV-IPPPGASAppaLAYRPLLSEPLVLAVPAAWAAEGGAPLAL 95
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 186 DELRDTPVVLFPQEVAPGLYDRVYGSCERAG---------IDMQhtlqssqlsSSLSMVSAGGGFALVPKSMAAISPPNV 256
Cdd:cd08453   96 AAVAAEPLVIFPRRIAPAFHDAVTGYYRAAGqtpriaqeaIQMQ---------TIISLVSAGMGVALVPASLRNLARPGV 166
                        170       180       190
                 ....*....|....*....|....*....|..
gi 505384093 257 TYHALRSPELYTDIALCWRRFERSRTVKRFLA 288
Cdd:cd08453  167 VYRELADPAPVLETGLVWRRDDASPVLARFLD 198
PBP2_LTTR_like_3 cd08436
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
92-290 7.78e-21

The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator, contains the type 2 periplasmic binding fold; LysR-transcriptional regulators comprise the largest family of prokaryotic transcription factor. Homologs of some of LTTRs with similar domain organizations are also found in the archaea and eukaryotic organisms. The LTTRs are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to a name a few. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176127 [Multi-domain]  Cd Length: 194  Bit Score: 87.66  E-value: 7.78e-21
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFhPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDREPMVVAL 171
Cdd:cd08436    1 RLAIGTITSLAA-VDLPELLARFHRRHPGVDIRLRQAGSDDLLAAVREGRLDLAFVGLPERRPPGLASRELAREPLVAVV 79
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVapGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAi 251
Cdd:cd08436   80 APDHPLAGRRRVALADLADEPFVDFPPGT--GARRQVDRAFAAAGVRRRVAFEVSDVDLLLDLVARGLGVALLPASVAA- 156
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|
gi 505384093 252 SPPNVtyHALR-SPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08436  157 RLPGL--AALPlEPAPRRRLYLAWSAPPPSPAARAFLELL 194
PBP2_AlsR cd08452
The C-terminal substrate binding domain of LysR-type trnascriptional regulator AlsR, which ...
92-290 1.27e-20

The C-terminal substrate binding domain of LysR-type trnascriptional regulator AlsR, which regulates acetoin formation under stationary phase growth conditions; contains the type 2 periplasmic binding fold; AlsR is responsible for activating the expression of the acetoin operon (alsSD) in response to inducing signals such as glucose and acetate. Like many other LysR family proteins, AlsR is transcribed divergently from the alsSD operon. The alsS gene encodes acetolactate synthase, an enzyme involved in the production of acetoin in cells of stationary-phase. AlsS catalyzes the conversion of two pyruvate molecules to acetolactate and carbon dioxide. Acetolactate is then converted to acetoin at low pH by acetolactate decarboxylase which encoded by the alsD gene. Acetoin is an important physiological metabolite excreted by many microorganisms grown on glucose or other fermentable carbon sources. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176143 [Multi-domain]  Cd Length: 197  Bit Score: 87.17  E-value: 1.27e-20
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSdAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVfELKILDREPMVVAL 171
Cdd:cd08452    1 LLVIGFVGA-AIYEFLPPIVREYRKKFPSVKVELRELSSPDQVEELLKGRIDIGFLHPPIQHTAL-HIETVQSSPCVLAL 78
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 172 HRDHPLAACGDLALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAI 251
Cdd:cd08452   79 PKQHPLASKEEITIEDLRDEPIITVAREAWPTLYDEIIQLCEQAGFRPKIVQEATEYQTVIGLVSAGIGVTFVPSSAKKL 158
                        170       180       190
                 ....*....|....*....|....*....|....*....
gi 505384093 252 SPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08452  159 FNLEVAYRKIDQINLNAEWSIAYRKDNHNPLLKHFIHIS 197
PRK11139 PRK11139
DNA-binding transcriptional activator GcvA; Provisional
6-114 2.14e-19

DNA-binding transcriptional activator GcvA; Provisional


Pssm-ID: 182990 [Multi-domain]  Cd Length: 297  Bit Score: 86.05  E-value: 2.14e-19
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKARgi 85
Cdd:PRK11139  11 LRAFEAAARHLSFTRAAEELFVTQAAVSHQIKALEDFLGLKLFRRRNRSLLLTEEGQRYFLDIREIFDQLAEATRKLR-- 88
                         90       100       110
                 ....*....|....*....|....*....|..
gi 505384093  86 ARGLNGSLSIGITSSDAFH---PKIFALIRQF 114
Cdd:PRK11139  89 ARSAKGALTVSLLPSFAIQwlvPRLSSFNEAH 120
PBP2_LTTR_aromatics_like_1 cd08447
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
121-289 4.53e-18

The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator similar to regulators involved in the catabolism of aromatic compounds, contains type 2 periplasmic binding fold; This CD represents the substrate binding domain of an uncharacterized LysR-type regulator similar to CbnR which is involved in the regulation of chlorocatechol breakdown. The transcription of the genes encoding enzymes involved in such degradation is regulated and expression of these enzymes is enhanced by inducers, which are either an intermediate in the metabolic pathway or compounds to be degraded. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176138 [Multi-domain]  Cd Length: 198  Bit Score: 80.38  E-value: 4.53e-18
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 121 VQVHQVEAnmsslttmLAEGELDIAFVRLPCESSKVfELKILDREPMVVALHRDHPLAACGDLALDELRDTPVVLF-PQE 199
Cdd:cd08447   37 VTTDQIEA--------LESGRIDLGLLRPPFARPGL-ETRPLVREPLVAAVPAGHPLAGAERLTLEDLDGQPFIMYsPTE 107
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 200 vAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISPPNVTYHALRSPELY-TDIALCWRRFE 278
Cdd:cd08447  108 -ARYFHDLVVRLFASAGVQPRYVQYLSQIHTMLALVRAGLGVALVPASASRLRFEGVVFRPLDLPRDVpVELHLAWRRDN 186
                        170
                 ....*....|.
gi 505384093 279 RSRTVKRFLAM 289
Cdd:cd08447  187 DNPALRALLDL 197
PBP2_BenM_CatM_CatR cd08445
The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ...
93-292 8.88e-18

The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in benzoate catabolism; contains the type 2 periplasmic binding fold; This CD includes the C-terminal of LysR-type transcription regulators, BenM, CatM, and CatR, which are involved in the benzoate catabolism. The BenM and CatM are paralogs with overlapping functions. BenM responds synergistically to two effectors, benzoate and cis,cis-muconate, to activate expression of the benABCDE operon which is involved in benzoate catabolism, while CatM responses only to muconate. BenM and CatM share high protein sequence identity and bind to the operator-promoter regions that have similar DNA sequences. In Pseudomonas species, phenolic compounds are converted by different enzymes to central intermediates, such as protocatechuate and catechols. Generally, unsubstituted compounds, such as benzoate, are metabolized by an ortho-cleavage pathway. The catBCA operon encodes three enzymes of the ortho-pathway required for benzoate catabolism: muconate lactonizing enzyme I, muconolactone isomerase, and catechol 1,2-dioxygenase. CatR normally responds to benzoate and cis,cis-muconate, an inducer molecule, to activate transcription of the catBCA operon, whose gene products convert benzoate to catechol. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate-binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction.


Pssm-ID: 176136  Cd Length: 203  Bit Score: 79.58  E-value: 8.88e-18
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  93 LSIGITSSdAFHPKIFALIRQFQVQNMAVQVHQVEanmssLTTM-----LAEGELDIAFVRLPCESSKVfELKILDREPM 167
Cdd:cd08445    3 FSIGFVPS-TLYGLLPELIRRFRQAAPDVEIELIE-----MTTVqqieaLKEGRIDVGFGRLRIEDPAI-RRIVLREEPL 75
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 168 VVALHRDHPLAACGD-LALDELRDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPK 246
Cdd:cd08445   76 VVALPAGHPLAQEKApLTLAQLADEPLILYPASPRPSFADQVLSLFRDHGLRPRVIQEVRELQTALGLVAAGEGVTLVPA 155
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*.
gi 505384093 247 SMAAISPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLAMMSE 292
Cdd:cd08445  156 SVQRLRRDDVVYRPLLDPDATSPIIMSVRAGDESPYIALILQLIRE 201
PRK11233 PRK11233
nitrogen assimilation transcriptional regulator; Provisional
1-145 6.00e-17

nitrogen assimilation transcriptional regulator; Provisional


Pssm-ID: 183045 [Multi-domain]  Cd Length: 305  Bit Score: 79.34  E-value: 6.00e-17
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:PRK11233   1 MNFRRLKYFVKIVDIGSLTQAAEVLHIAQPALSQQVATLEGELNQQLLIRTKRGVTPTEAGKILYTHARAILRQCEQAQL 80
                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*
gi 505384093  81 KARGIARGLNGSLSIGITSSDAFHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIA 145
Cdd:PRK11233  81 AVHNVGQALSGQVSIGLAPGTAASSLTMPLLQAVRAEFPGIVLYLHENSGATLNEKLMNGQLDMA 145
PRK12684 PRK12684
CysB family HTH-type transcriptional regulator;
1-194 1.39e-16

CysB family HTH-type transcriptional regulator;


Pssm-ID: 237173 [Multi-domain]  Cd Length: 313  Bit Score: 78.48  E-value: 1.39e-16
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARER-HFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRL-TRGVELTEAGEAfyedackILALSDAA 78
Cdd:PRK12684   1 MNLHQLRFVREAVRQNfNLTEAAKALYTSQPGVSKAIIELEDELGVEIFTRHgKRLRGLTEPGRI-------ILASVERI 73
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  79 LEKARGIARGLN-------GSLSIGITSSDAFH--PKIfalIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIA---- 145
Cdd:PRK12684  74 LQEVENLKRVGKefaaqdqGNLTIATTHTQARYalPAA---IKEFKKRYPKVRLSILQGSPTQIAEMVLHGQADLAiate 150
                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|....*.
gi 505384093 146 -------FVRLPCesskvfelkiLDREPMVVALHrDHPLAACGDLALDELRDTPVV 194
Cdd:PRK12684 151 aiadykeLVSLPC----------YQWNHCVVVPP-DHPLLERKPLTLEDLAQYPLI 195
PBP2_OxyR cd08411
The C-terminal substrate-binding domain of the LysR-type transcriptional regulator OxyR, a ...
91-286 1.58e-15

The C-terminal substrate-binding domain of the LysR-type transcriptional regulator OxyR, a member of the type 2 periplasmic binding fold protein superfamily; OxyR senses hydrogen peroxide and is activated through the formation of an intramolecular disulfide bond. The OxyR activation induces the transcription of genes necessary for the bacterial defense against oxidative stress. The OxyR of LysR-type transcriptional regulator family is composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The C-terminal domain also contains the redox-active cysteines that mediate the redox-dependent conformational switch. Thus, the interaction between the OxyR-tetramer and DNA is notably different between the oxidized and reduced forms. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176103 [Multi-domain]  Cd Length: 200  Bit Score: 73.33  E-value: 1.58e-15
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  91 GSLSIGITSSDA--FHPKIFALIRQfqvqNM-AVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDrEPM 167
Cdd:cd08411    1 GPLRLGVIPTIApyLLPRLLPALRQ----AYpKLRLYLREDQTERLLEKLRSGELDAALLALPVDEPGLEEEPLFD-EPF 75
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 168 VVALHRDHPLAACGDLALDELRDTPVVLfpqeVAPG--LYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVP 245
Cdd:cd08411   76 LLAVPKDHPLAKRKSVTPEDLAGERLLL----LEEGhcLRDQALELCRLAGAREQTDFEATSLETLRQMVAAGLGITLLP 151
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*.
gi 505384093 246 KsMAAISP----PNVTYHALRSPELYTDIALCWRR-FERSRTVKRF 286
Cdd:cd08411  152 E-LAVPSEelrgDRLVVRPFAEPAPSRTIGLVWRRsSPRAAAFEAL 196
cysB PRK12681
HTH-type transcriptional regulator CysB;
1-194 2.01e-15

HTH-type transcriptional regulator CysB;


Pssm-ID: 183678 [Multi-domain]  Cd Length: 324  Bit Score: 74.93  E-value: 2.01e-15
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARER-HFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRR----LTRgveLTEAGEafyedacKILALS 75
Cdd:PRK12681   1 MKLQQLRYIVEVVNHNlNVSATAEGLYTSQPGISKQVRMLEDELGIQIFARsgkhLTQ---VTPAGE-------EIIRIA 70
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  76 DAALEKARGIARGLN-------GSLSIGITSSDAFH--PKIfalIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIA- 145
Cdd:PRK12681  71 REILSKVESIKSVAGehtwpdkGSLYIATTHTQARYalPPV---IKGFIERYPRVSLHMHQGSPTQIAEAAAKGNADFAi 147
                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|....*....
gi 505384093 146 ----------FVRLPCEsskvfelkildREPMVVALHRDHPLAACGDLALDELRDTPVV 194
Cdd:PRK12681 148 atealhlyddLIMLPCY-----------HWNRSVVVPPDHPLAKKKKLTIEELAQYPLV 195
PRK11074 PRK11074
putative DNA-binding transcriptional regulator; Provisional
11-192 2.10e-14

putative DNA-binding transcriptional regulator; Provisional


Pssm-ID: 182948 [Multi-domain]  Cd Length: 300  Bit Score: 71.90  E-value: 2.10e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  11 AVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKARGIARGLN 90
Cdd:PRK11074  12 AVARTGSFSAAAQELHRVPSAVSYTVRQLEEWLAVPLFERRHRDVELTPAGEWFVKEARSVIKKMQETRRQCQQVANGWR 91
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  91 GSLSI---GITSSDAFHPKIFALIRQFqvQNMAVQVHQ-V-----EAnmsslttmLAEGELDIAF---VRLPCESSkvFE 158
Cdd:PRK11074  92 GQLSIavdNIVRPDRTRQLIVDFYRHF--DDVELIIRQeVfngvwDA--------LADGRVDIAIgatRAIPVGGR--FA 159
                        170       180       190
                 ....*....|....*....|....*....|....*
gi 505384093 159 LKILDREPMVVALHRDHPLAAC-GDLALDELRDTP 192
Cdd:PRK11074 160 FRDMGMLSWACVVSSDHPLASMdGPLSDDELRPYP 194
PRK12680 PRK12680
LysR family transcriptional regulator;
1-203 2.53e-14

LysR family transcriptional regulator;


Pssm-ID: 183677 [Multi-domain]  Cd Length: 327  Bit Score: 71.96  E-value: 2.53e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVA-RERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVE-LTEAGEAFYEDACKILALSDAA 78
Cdd:PRK12680   1 MTLTQLRYLVAIAdAELNITLAAARVHATQPGLSKQLKQLEDELGFLLFVRKGRSLEsVTPAGVEVIERARAVLSEANNI 80
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  79 LEKARGIARGLNGSLSIGITSSDA--FHPKIFALIRQFQVQnmaVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKV 156
Cdd:PRK12680  81 RTYAANQRRESQGQLTLTTTHTQArfVLPPAVAQIKQAYPQ---VSVHLQQAAESAALDLLGQGDADIAIVSTAGGEPSA 157
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|....*...
gi 505384093 157 FELKILDREPMVVALHRDHPLAACG-DLALDELRDTPVVLFPQEVAPG 203
Cdd:PRK12680 158 GIAVPLYRWRRLVVVPRGHALDTPRrAPDMAALAEHPLISYESSTRPG 205
PRK12682 PRK12682
transcriptional regulator CysB-like protein; Reviewed
1-194 2.66e-14

transcriptional regulator CysB-like protein; Reviewed


Pssm-ID: 183679 [Multi-domain]  Cd Length: 309  Bit Score: 71.56  E-value: 2.66e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVAReRHF--TRAAKALGISQPPLSQQIKRLEEEVGTPLF-RRLTRGVELTEAGEAFYEDACKILalsdA 77
Cdd:PRK12682   1 MNLQQLRFVREAVR-RNLnlTEAAKALHTSQPGVSKAIIELEEELGIEIFiRHGKRLKGLTEPGKAVLDVIERIL----R 75
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  78 ALEKARGIARGLN----GSLSIGITSSDAFH--PKIfalIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVrlpC 151
Cdd:PRK12682  76 EVGNIKRIGDDFSnqdsGTLTIATTHTQARYvlPRV---VAAFRKRYPKVNLSLHQGSPDEIARMVISGEADIGIA---T 149
                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|....
gi 505384093 152 ESskvfelkiLDREPMVVAL------HR-----DHPLAACGDLALDELRDTPVV 194
Cdd:PRK12682 150 ES--------LADDPDLATLpcydwqHAvivppDHPLAQEERITLEDLAEYPLI 195
PRK10341 PRK10341
transcriptional regulator TdcA;
4-250 3.59e-14

transcriptional regulator TdcA;


Pssm-ID: 182391 [Multi-domain]  Cd Length: 312  Bit Score: 71.43  E-value: 3.59e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   4 RYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKAR 83
Cdd:PRK10341  10 QHLVVFQEVIRSGSIGSAAKELGLTQPAVSKIINDIEDYFGVELIVRKNTGVTLTPAGQVLLSRSESITREMKNMVNEIN 89
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  84 GIARGLNGSLSIGITSSDAFhPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCEsSKVFELKI-- 161
Cdd:PRK10341  90 GMSSEAVVDVSFGFPSLIGF-TFMSDMINKFKEVFPKAQVSMYEAQLSSFLPAIRDGRLDFAIGTLSNE-MKLQDLHVep 167
                        170       180       190       200       210       220       230       240
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 162 -LDREPMVVAlhrdHPLAAC-GDLALDELRDTPVVLfPQeVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGG 239
Cdd:PRK10341 168 lFESEFVLVA----SKSRTCtGTTTLESLKNEQWVL-PQ-TNMGYYSELLTTLQRNGISIENIVKTDSVVTIYNLVLNAD 241
                        250
                 ....*....|.
gi 505384093 240 GFALVPKSMAA 250
Cdd:PRK10341 242 FLTVIPCDMTS 252
PRK12683 PRK12683
transcriptional regulator CysB-like protein; Reviewed
1-194 4.23e-14

transcriptional regulator CysB-like protein; Reviewed


Pssm-ID: 237172 [Multi-domain]  Cd Length: 309  Bit Score: 71.23  E-value: 4.23e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVAReRHF--TRAAKALGISQPPLSQQIKRLEEEVGTPLF-RRLTRGVELTEAGEAFYEDACKILAlsDA 77
Cdd:PRK12683   1 MNFQQLRIIREAVR-QNFnlTEVANALYTSQSGVSKQIKDLEDELGVEIFiRRGKRLTGLTEPGKELLQIVERMLL--DA 77
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  78 ALEK--ARGIARGLNGSLSIGITSSDAFH--PKIfalIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAfvrLPCES 153
Cdd:PRK12683  78 ENLRrlAEQFADRDSGHLTVATTHTQARYalPKV---VRQFKEVFPKVHLALRQGSPQEIAEMLLNGEADIG---IATEA 151
                        170       180       190       200       210
                 ....*....|....*....|....*....|....*....|....*....|..
gi 505384093 154 skvfelkiLDREPMVVAL------H-----RDHPLAACGDLALDELRDTPVV 194
Cdd:PRK12683 152 --------LDREPDLVSFpyyswhHvvvvpKGHPLTGRENLTLEAIAEYPII 195
PRK15092 PRK15092
DNA-binding transcriptional repressor LrhA; Provisional
1-145 9.47e-14

DNA-binding transcriptional repressor LrhA; Provisional


Pssm-ID: 237907 [Multi-domain]  Cd Length: 310  Bit Score: 70.06  E-value: 9.47e-14
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALe 80
Cdd:PRK15092  11 LDLDLLRTFVAVADLNTFAAAAAAVCRTQSAVSQQMQRLEQLVGKELFARHGRNKLLTEHGIQLLGYARKILRFNDEAC- 89
                         90       100       110       120       130       140
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*...
gi 505384093  81 kARGIARGLNGSLSIGIT--SSDAFHPKIFALIRQFQVQ-NMAVQVHQVEANMSslttMLAEGELDIA 145
Cdd:PRK15092  90 -SSLMYSNLQGVLTIGASddTADTILPFLLNRVSSVYPKlALDVRVKRNAFMME----MLESQEVDLA 152
PRK10094 PRK10094
HTH-type transcriptional activator AllS;
6-97 1.08e-12

HTH-type transcriptional activator AllS;


Pssm-ID: 182237 [Multi-domain]  Cd Length: 308  Bit Score: 67.14  E-value: 1.08e-12
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKARGI 85
Cdd:PRK10094   7 LRTFIAVAETGSFSKAAERLCKTTATISYRIKLLEENTGVALFFRTTRSVTLTAAGEHLLSQARDWLSWLESMPSELQQV 86
                         90
                 ....*....|..
gi 505384093  86 ARGLNGSLSIGI 97
Cdd:PRK10094  87 NDGVERQVNIVI 98
PBP2_HcaR cd08450
The C-terminal substrate binding domain of LysR-type transcriptional regulator HcaR in ...
137-288 1.44e-12

The C-terminal substrate binding domain of LysR-type transcriptional regulator HcaR in involved in 3-phenylpropionic acid catabolism, contains the type2 periplasmic binding fold; HcaR, a member of the LysR family of transcriptional regulators, controls the expression of the hcA1, A2, B, C, and D operon, encoding for the 3-phenylpropionate dioxygenase complex and 3-phenylpropionate-2',3'-dihydrodiol dehydrogenase, that oxidizes 3-phenylpropionate to 3-(2,3-dihydroxyphenyl) propionate. Dioxygenases play an important role in protecting the cell against the toxic effects of dioxygen. The expression of hcaR is negatively auto-regulated, as for other members of the LysR family, and is strongly repressed in the presence of glucose. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176141 [Multi-domain]  Cd Length: 196  Bit Score: 65.09  E-value: 1.44e-12
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 137 LAEGELDIAFVRLPCESSKVfELKILDREPMVVALHRDHPLAACGDLALDELRDTPVVLfPQEVAPGLYDRVYGSCERAG 216
Cdd:cd08450   45 LMRGKLDVAFMRPEIQSDGI-DYQLLLKEPLIVVLPADHRLAGREKIPPQDLAGENFIS-PAPTAPVLQQVIENYAAQHN 122
                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|..
gi 505384093 217 IDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISPPNVTYHALRSPELYTDIALCWRRFERSRTVKRFLA 288
Cdd:cd08450  123 IQPNIIQEADNLLSAMSLVASTLGCALLPLYANNLLPPSVVARPLSGETPTIDLVMGYNKANTSPLLKRFLS 194
PRK13348 PRK13348
HTH-type transcriptional regulator ArgP;
6-63 1.93e-12

HTH-type transcriptional regulator ArgP;


Pssm-ID: 237357 [Multi-domain]  Cd Length: 294  Bit Score: 66.15  E-value: 1.93e-12
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRlTRGVELTEAGEA 63
Cdd:PRK13348   7 LEALAAVVETGSFERAARRLHVTPSAVSQRIKALEESLGQPLLVR-GRPCRPTPAGQR 63
PRK10086 PRK10086
DNA-binding transcriptional regulator DsdC;
6-65 3.94e-11

DNA-binding transcriptional regulator DsdC;


Pssm-ID: 182231 [Multi-domain]  Cd Length: 311  Bit Score: 62.33  E-value: 3.94e-11
                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFY 65
Cdd:PRK10086  19 LHTFEVAARHQSFALAADELSLTPSAVSHRINQLEEELGIKLFVRSHRKVELTEEGKRVF 78
PRK03635 PRK03635
ArgP/LysG family DNA-binding transcriptional regulator;
6-62 3.98e-11

ArgP/LysG family DNA-binding transcriptional regulator;


Pssm-ID: 235144 [Multi-domain]  Cd Length: 294  Bit Score: 62.48  E-value: 3.98e-11
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRlTRGVELTEAGE 62
Cdd:PRK03635   7 LEALAAVVREGSFERAAQKLHITQSAVSQRIKALEERVGQVLLVR-TQPCRPTEAGQ 62
PBP2_LTTR_like_6 cd08423
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
120-288 5.04e-11

The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator, contains the type 2 periplasmic binding fold; LysR-transcriptional regulators comprise the largest family of prokaryotic transcription factor. Homologs of some of LTTRs with similar domain organizations are also found in the archaea and eukaryotic organisms. The LTTRs are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to a name a few. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176115 [Multi-domain]  Cd Length: 200  Bit Score: 60.69  E-value: 5.04e-11
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 120 AVQVHQVEANMSSLTTMLAEGELDIAFVR----LPCESSKVFELKILDREPMVVALHRDHPLAACGDLALDELRDTPVVL 195
Cdd:cd08423   28 GLEVRLREAEPPESLDALRAGELDLAVVFdypvTPPPDDPGLTRVPLLDDPLDLVLPADHPLAGREEVALADLADEPWIA 107
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 196 FPQEVAPGLYDRVygSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISPPNVTYHALRsPELYTDIALCWR 275
Cdd:cd08423  108 GCPGSPCHRWLVR--ACRAAGFTPRIAHEADDYATVLALVAAGLGVALVPRLALGARPPGVVVRPLR-PPPTRRIYAAVR 184
                        170
                 ....*....|....
gi 505384093 276 RFE-RSRTVKRFLA 288
Cdd:cd08423  185 AGAaRRPAVAAALE 198
PRK10837 PRK10837
putative DNA-binding transcriptional regulator; Provisional
3-195 8.70e-11

putative DNA-binding transcriptional regulator; Provisional


Pssm-ID: 182768 [Multi-domain]  Cd Length: 290  Bit Score: 61.24  E-value: 8.70e-11
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDAckiLALSDAALEKA 82
Cdd:PRK10837   5 LRQLEVFAEVLKSGSTTQASVMLALSQSAVSAALTDLEGQLGVQLFDRVGKRLVVNEHGRLLYPRA---LALLEQAVEIE 81
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  83 RgIARGLNGSLSIGITSSDAFH--PKIFALIRQ-FQVQNMAVQVhqveANMSSLTTMLAEGELDIAFVRLPCESSKVFEL 159
Cdd:PRK10837  82 Q-LFREDNGALRIYASSTIGNYilPAMIARYRRdYPQLPLELSV----GNSQDVINAVLDFRVDIGLIEGPCHSPELISE 156
                        170       180       190
                 ....*....|....*....|....*....|....*.
gi 505384093 160 KILDREpMVVALHRDHPLAAcGDLALDELRDTPVVL 195
Cdd:PRK10837 157 PWLEDE-LVVFAAPDSPLAR-GPVTLEQLAAAPWIL 190
PRK11716 PRK11716
HTH-type transcriptional activator IlvY;
27-113 4.04e-10

HTH-type transcriptional activator IlvY;


Pssm-ID: 236961 [Multi-domain]  Cd Length: 269  Bit Score: 59.06  E-value: 4.04e-10
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  27 ISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKARGIARGLNGSLSI--GITSSDAFH 104
Cdd:PRK11716   3 VSPSTLSRQIQRLEEELGQPLFVRDNRSVTLTEAGEELRPFAQQTLLQWQQLRHTLDQQGPSLSGELSLfcSVTAAYSHL 82

                 ....*....
gi 505384093 105 PKIFALIRQ 113
Cdd:PRK11716  83 PPILDRFRA 91
PRK03601 PRK03601
HTH-type transcriptional regulator HdfR;
1-62 1.61e-09

HTH-type transcriptional regulator HdfR;


Pssm-ID: 235137 [Multi-domain]  Cd Length: 275  Bit Score: 57.33  E-value: 1.61e-09
                         10        20        30        40        50        60
                 ....*....|....*....|....*....|....*....|....*....|....*....|..
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGE 62
Cdd:PRK03601   1 MDTELLKTFLEVSRTRHFGRAAESLYLTQSAVSFRIRQLENQLGVNLFTRHRNNIRLTAAGE 62
cbl PRK12679
HTH-type transcriptional regulator Cbl;
11-198 1.80e-09

HTH-type transcriptional regulator Cbl;


Pssm-ID: 183676 [Multi-domain]  Cd Length: 316  Bit Score: 57.51  E-value: 1.80e-09
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  11 AVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLF-RRLTRGVELTEAGEAFYEDACKILALSDAALEKARGIARGL 89
Cdd:PRK12679  12 AARQDYNLTEVANMLFTSQSGVSRHIRELEDELGIEIFiRRGKRLLGMTEPGKALLVIAERILNEASNVRRLADLFTNDT 91
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  90 NGSLSIGITSSDAFH--PKIfalIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRlpcesskvfelKILDREPM 167
Cdd:PRK12679  92 SGVLTIATTHTQARYslPEV---IKAFRELFPEVRLELIQGTPQEIATLLQNGEADIGIAS-----------ERLSNDPQ 157
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|..
gi 505384093 168 VVA-----------LHRDHPLAACGDLALDELRDTPVVLFPQ 198
Cdd:PRK12679 158 LVAfpwfrwhhsllVPHDHPLTQITPLTLESIAKWPLITYRQ 199
PBP2_LysR_opines_like cd08415
The C-terminal substrate-domain of LysR-type transcriptional regulators involved in the ...
109-288 2.24e-09

The C-terminal substrate-domain of LysR-type transcriptional regulators involved in the catabolism of opines and that of related regulators, contains the type 2 periplasmic binding fold; This CD includes the C-terminal substrate-domain of LysR-type transcriptional regulators, OccR and NocR, involved in the catabolism of opines and that of LysR for lysine biosynthesis which clustered together in phylogenetic trees. Opines, such as octopine and nopaline, are low molecular weight compounds found in plant crown gall tumors that are produced by the parasitic bacterium Agrobacterium. There are at least 30 different opines identified so far. Opines are utilized by tumor-colonizing bacteria as a source of carbon, nitrogen, and energy. NocR and OccR belong to the family of LysR-type transcriptional regulators that positively regulates the catabolism of nopaline and octopine, respectively. Both nopaline and octopalin are arginine derivatives. In Agrobacterium tumefaciens, NocR regulates expression of the divergently transcribed nocB and nocR genes of the nopaline catabolism (noc) region. OccR protein activates the occQ operon of the Ti plasmid in response to octopine. This operon encodes proteins required for the uptake and catabolism of octopine. The occ operon also encodes the TraR protein, which is a quorum-sensing transcriptional regulator of the Ti plasmid tra regulon. LysR is the transcriptional activator of lysA gene encoding diaminopimelate decarboxylase, an enzyme that catalyses the decarboxylation of diaminopimelate to produce lysine. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176107 [Multi-domain]  Cd Length: 196  Bit Score: 56.03  E-value: 2.24e-09
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 109 ALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILdREPMVVALHRDHPLAACGDLALDEL 188
Cdd:cd08415   17 RAIARFRARHPDVRISLHTLSSSTVVEAVLSGQADLGLASLPLDHPGLESEPLA-SGRAVCVLPPGHPLARKDVVTPADL 95
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 189 RDTPVVLFPQEVapGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALV-PKSMAAISPPNVTYHALRsPELY 267
Cdd:cd08415   96 AGEPLISLGRGD--PLRQRVDAAFERAGVEPRIVIETQLSHTACALVAAGLGVAIVdPLTAAGYAGAGLVVRPFR-PAIP 172
                        170       180
                 ....*....|....*....|..
gi 505384093 268 TDIALCWRRFE-RSRTVKRFLA 288
Cdd:cd08415  173 FEFALVRPAGRpLSRLAQAFID 194
PRK10082 PRK10082
hypochlorite stress DNA-binding transcriptional regulator HypT;
1-162 3.57e-09

hypochlorite stress DNA-binding transcriptional regulator HypT;


Pssm-ID: 182228 [Multi-domain]  Cd Length: 303  Bit Score: 56.60  E-value: 3.57e-09
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:PRK10082  11 IETKWLYDFLTLEKCRNFSQAAVSRNVSQPAFSRRIRALEQAIGVELFNRQVTPLQLSEQGKIFHSQIRHLLQQLESNLA 90
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARG--------IARGLNGSLSIGITSSdafhpkifaLIRQFQVQ-NMAVQVHQVEANMSslttMLAEGELDIAF----- 146
Cdd:PRK10082  91 ELRGgsdyaqrkIKIAAAHSLSLGLLPS---------IISQMPPLfTWAIEAIDVDEAVD----KLREGQSDCIFsfhde 157
                        170
                 ....*....|....*...
gi 505384093 147 --VRLPCESSKVFELKIL 162
Cdd:PRK10082 158 dlLEAPFDHIRLFESQLF 175
PBP2_LTTR_like_4 cd08440
TThe C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
109-289 5.43e-09

TThe C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator, contains the type 2 periplasmic binding fold; LysR-transcriptional regulators comprise the largest family of prokaryotic transcription factor. Homologs of some of LTTRs with similar domain organizations are also found in the archaea and eukaryotic organisms. The LTTRs are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to a name a few. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176131 [Multi-domain]  Cd Length: 197  Bit Score: 54.84  E-value: 5.43e-09
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 109 ALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILdREPMVVALHRDHPLAACGDLALDEL 188
Cdd:cd08440   17 PVLAAFRRRHPGIRVRLRDVSAEQVIEAVRSGEVDFGIGSEPEADPDLEFEPLL-RDPFVLVCPKDHPLARRRSVTWAEL 95
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 189 RDTPVVLFPQEvaPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKS-MAAISPPNVTYHALRSPELY 267
Cdd:cd08440   96 AGYPLIALGRG--SGVRALIDRALAAAGLTLRPAYEVSHMSTALGMVAAGLGVAVLPALaLPLADHPGLVARPLTEPVVT 173
                        170       180
                 ....*....|....*....|...
gi 505384093 268 TDIALCWRR-FERSRTVKRFLAM 289
Cdd:cd08440  174 RTVGLIRRRgRSLSPAAQAFLDL 196
PRK14997 PRK14997
LysR family transcriptional regulator; Provisional
1-87 1.74e-08

LysR family transcriptional regulator; Provisional


Pssm-ID: 184959 [Multi-domain]  Cd Length: 301  Bit Score: 54.61  E-value: 1.74e-08
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDaCKILALSDAALE 80
Cdd:PRK14997   2 TDLNDFAWFVHVVEEGGFAAAGRALDEPKSKLSRRIAQLEERLGVRLIQRTTRQFNVTEVGQTFYEH-CKAMLVEAQAAQ 80
                         90
                 ....*....|....*
gi 505384093  81 KA--------RGIAR 87
Cdd:PRK14997  81 DAiaalqvepRGIVK 95
PRK09801 PRK09801
LysR family transcriptional regulator;
6-124 7.71e-08

LysR family transcriptional regulator;


Pssm-ID: 182085 [Multi-domain]  Cd Length: 310  Bit Score: 52.73  E-value: 7.71e-08
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   6 LRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALEKARGI 85
Cdd:PRK09801  11 LQVLVEIVHSGSFSAAAATLGQTPAFVTKRIQILENTLATTLLNRSARGVALTESGQRCYEHALEILTQYQRLVDDVTQI 90
                         90       100       110       120
                 ....*....|....*....|....*....|....*....|..
gi 505384093  86 ARGLNGSLSIGIT---SSDAFHPKIFALIRQFQvqnmAVQVH 124
Cdd:PRK09801  91 KTRPEGMIRIGCSfgfGRSHIAPAITELMRNYP----ELQVH 128
PBP2_CbbR_RubisCO_like cd08419
The C-terminal substrate binding of LysR-type transcriptional regulator (CbbR) of RubisCO ...
92-195 1.49e-07

The C-terminal substrate binding of LysR-type transcriptional regulator (CbbR) of RubisCO operon, which is involved in the carbon dioxide fixation, contains the type 2 periplasmic binding fold; CbbR, a LysR-type transcriptional regulator, is required to activate expression of RubisCO, one of two unique enzymes in the Calvin-Benson-Bassham (CBB) cycle pathway. All plants, cyanobacteria, and many autotrophic bacteria use the CBB cycle to fix carbon dioxide. Thus, this cycle plays an essential role in assimilating CO2 into organic carbon on earth. The key CBB cycle enzyme is ribulose 1,5-bisphosphate carboxylase/oxygenase (RubisCO), which catalyzes the actual CO2 fixation reaction. The CO2 concentration affects the expression of RubisCO genes. It has also shown that NADPH enhances the DNA-binding ability of the CbbR. RubisCO is composed of eight large (CbbL) and eight small subunits (CbbS). The topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176111  Cd Length: 197  Bit Score: 50.58  E-value: 1.49e-07
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIG-ITSSDAFHPKifaLIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDrEPMVVA 170
Cdd:cd08419    1 RLRLAvVSTAKYFAPR---LLGAFCRRHPGVEVSLRVGNREQVLERLADNEDDLAIMGRPPEDLDLVAEPFLD-NPLVVI 76
                         90       100
                 ....*....|....*....|....*
gi 505384093 171 LHRDHPLAACGDLALDELRDTPVVL 195
Cdd:cd08419   77 APPDHPLAGQKRIPLERLAREPFLL 101
PBP2_YofA_SoxR_like cd08442
The C-terminal substrate binding domain of LysR-type transcriptional regulators, YofA and SoxR, ...
125-290 1.86e-07

The C-terminal substrate binding domain of LysR-type transcriptional regulators, YofA and SoxR, contains the type 2 periplasmic binding fold; YofA is a LysR-like transcriptional regulator of cell growth in Bacillus subtillis. YofA controls cell viability and the formation of constrictions during cell division. YofaA positively regulates expression of the cell division gene ftsW, and thus is essential for cell viability during stationary-phase growth of Bacillus substilis. YofA shows significant homology to SoxR from Arthrobacter sp. TE1826. SoxR is a negative regulator for the sarcosine oxidase gene soxA. Sarcosine oxidase catalyzes the oxidative demethylation of sarcosine, which is involved in the metabolism of creatine and choline. The topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176133  Cd Length: 193  Bit Score: 50.30  E-value: 1.86e-07
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 125 QVEANMSSLTT--MLA---EGELDIAFVRLP-----CESSKVFElkildrEPMVVALHRDHPLAAcgdlALDELRDTPVV 194
Cdd:cd08442   28 KVDLSLSTGTTgaLIQavlEGRLDGAFVAGPvehprLEQEPVFQ------EELVLVSPKGHPPVS----RAEDLAGSTLL 97
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 195 LFPQevapGLY--DRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISP--PNVTYHALRSPELYTDI 270
Cdd:cd08442   98 AFRA----GCSyrRRLEDWLAEEGVSPGKIMEFGSYHAILGCVAAGMGIALLPRSVLDSLQgrGSVSIHPLPEPFADVTT 173
                        170       180
                 ....*....|....*....|
gi 505384093 271 ALCWRRFERSRTVKRFLAMM 290
Cdd:cd08442  174 WLVWRKDSFTAALQAFLDLL 193
nhaR PRK11062
transcriptional activator NhaR; Provisional
5-75 1.89e-07

transcriptional activator NhaR; Provisional


Pssm-ID: 182938 [Multi-domain]  Cd Length: 296  Bit Score: 51.55  E-value: 1.89e-07
                         10        20        30        40        50        60        70
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 505384093   5 YLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALS 75
Cdd:PRK11062   8 HLYYFWMVCKEGSVVGAAEALFLTPQTITGQIKALEERLQGKLFKRKGRGLEPTELGELVFRYADKMFTLS 78
PRK10632 PRK10632
HTH-type transcriptional activator AaeR;
1-102 2.47e-07

HTH-type transcriptional activator AaeR;


Pssm-ID: 182601 [Multi-domain]  Cd Length: 309  Bit Score: 51.30  E-value: 2.47e-07
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 ME-LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAAL 79
Cdd:PRK10632   1 MErLKRMSVFAKVVEFGSFTAAARQLQMSVSSISQTVSKLEDELQVKLLNRSTRSIGLTEAGRIYYQGCRRMLHEVQDVH 80
                         90       100
                 ....*....|....*....|...
gi 505384093  80 EKARGIARGLNGSLSIGITSSDA 102
Cdd:PRK10632  81 EQLYAFNNTPIGTLRIGCSSTMA 103
PBP2_CysL_like cd08420
C-terminal substrate binding domain of LysR-type transcriptional regulator CysL, which ...
109-195 6.70e-07

C-terminal substrate binding domain of LysR-type transcriptional regulator CysL, which activates the transcription of the cysJI operon encoding sulfite reductase, contains the type 2 periplasmic binding fold; CysL, also known as YwfK, is a regular of sulfur metabolism in Bacillus subtilis. Sulfur is required for the synthesis of proteins and essential cofactors in all living organism. Sulfur can be assimilated either from inorganic sources (sulfate and thiosulfate), or from organic sources (sulfate esters, sulfamates, and sulfonates). CysL activates the transcription of the cysJI operon encoding sulfite reductase, which reduces sulfite to sulfide. Both cysL mutant and cysJI mutant are unable to grow using sulfate or sulfite as the sulfur source. Like other LysR-type regulators, CysL also negatively regulates its own transcription. In Escherichia coli, three LysR-type activators are involved in the regulation of sulfur metabolism: CysB, Cbl and MetR. The topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176112 [Multi-domain]  Cd Length: 201  Bit Score: 49.03  E-value: 6.70e-07
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 109 ALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFELKILDREpMVVALHRDHPLAACGDLALDEL 188
Cdd:cd08420   17 RLLARFRKRYPEVRVSLTIGNTEEIAERVLDGEIDLGLVEGPVDHPDLIVEPFAEDE-LVLVVPPDHPLAGRKEVTAEEL 95

                 ....*..
gi 505384093 189 RDTPVVL 195
Cdd:cd08420   96 AAEPWIL 102
PBP2_CbnR cd08486
The C-terminal substrate binding domain of LysR-type transcriptional regulator, CbnR, involved ...
110-287 1.08e-06

The C-terminal substrate binding domain of LysR-type transcriptional regulator, CbnR, involved in the chlorocatechol catabolism, contains the type 2 periplasmic binding fold; This CD represents the substrate binding domain of LysR-type regulator CbnR which is involved in the regulation of chlorocatechol breakdown. The chlorocatechol-degradative pathway is often found in bacteria that can use chlorinated aromatic compounds as carbon and energy sources. CbnR is found in the 3-chlorobenzoate degradative bacterium Ralstonia eutropha NH9 and forms a tetramer. CbnR activates the expression of the cbnABCD genes, which are responsible for the degradation of chlorocatechol converted from 3-chlorobenzoate and are transcribed divergently from cbnR. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176175  Cd Length: 198  Bit Score: 48.17  E-value: 1.08e-06
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 110 LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVfELKILDREPMVVALHRDHPLAACGDLALDELR 189
Cdd:cd08486   19 LLRAFLTSTPTATVSLTHMTKDEQVEGLLAGTIHVGFSRFFPRHPGI-EIVNIAQEDLYLAVHRSQSGKFGKTCKLADLR 97
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 190 DTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISPPNVTYHALRSPELYTD 269
Cdd:cd08486   98 AVELTLFPRGGRPSFADEVIGLFKHAGIEPRIARVVEDATAALALTMAGAASSIVPASVAAIRWPDIAFARIVGTRVKVP 177
                        170
                 ....*....|....*...
gi 505384093 270 IALCWRRFERSRTVKRFL 287
Cdd:cd08486  178 ISCIFRKEKQPPILARFV 195
PBP2_ClcR cd08485
The C-terminal substrate binding domain of LysR-type transcriptional regulator ClcR involved ...
110-290 3.48e-06

The C-terminal substrate binding domain of LysR-type transcriptional regulator ClcR involved in the chlorocatechol catabolism, contains type 2 periplasmic binding fold; In soil bacterium Pseudomonas putida, the ortho-pathways of catechol and 3-chlorocatechol are central catabolic pathways that convert aromatic and chloroaromaric compounds to tricarboxylic acid (TCA) cycle intermediates. The 3-chlorocatechol-degradative pathway is encoded by clcABD operon, which requires the divergently transcribed clcR and an intermediate of the pathway, 2-chloromuconate, as an inducer for activation. The topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176174 [Multi-domain]  Cd Length: 198  Bit Score: 46.61  E-value: 3.48e-06
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 110 LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRL-PCESSKVfeLKILDREPMVVALHRDHPLAACGDLALDEL 188
Cdd:cd08485   19 LLRQLLSVAPSATVSLTQMSKNRQIEALDAGTIDIGFGRFyPYQEGVV--VRNVTNERLFLGAQKSRARSFGEQVHCSAL 96
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 189 RDTPVVLFPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISPPNVTYHALRSPELYT 268
Cdd:cd08485   97 RNEPLILFPREGRPSFADEVIGVFKNARVEPKVVAIVEDVNAAMALALAGVGVTIVPETVAMISWPDFGFTELVGSKATV 176
                        170       180
                 ....*....|....*....|..
gi 505384093 269 DIALCWRRFERSRTVKRFLAMM 290
Cdd:cd08485  177 PVSCIYRHDHIAPILKTFLNLL 198
PRK15421 PRK15421
HTH-type transcriptional regulator MetR;
1-197 5.09e-06

HTH-type transcriptional regulator MetR;


Pssm-ID: 185319 [Multi-domain]  Cd Length: 317  Bit Score: 47.32  E-value: 5.09e-06
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093   1 MELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELTEAGEAFYEDACKILALSDAALE 80
Cdd:PRK15421   2 IEVKHLKTLQALRNCGSLAAAAATLHQTQSALSHQFSDLEQRLGFRLFVRKSQPLRFTPQGEILLQLANQVLPQISQALQ 81
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  81 KARgiaRGLNGSLSIGITSSDAFHPKIFALirqfqvQNMAVQVHQVEANMSSLTTM-----LAEGELDIAFVRLPCESSK 155
Cdd:PRK15421  82 ACN---EPQQTRLRIAIECHSCIQWLTPAL------ENFHKNWPQVEMDFKSGVTFdpqpaLQQGELDLVMTSDILPRSG 152
                        170       180       190       200
                 ....*....|....*....|....*....|....*....|..
gi 505384093 156 VFELKILDREPMVVaLHRDHPLAACGDLALDELRDTPVVLFP 197
Cdd:PRK15421 153 LHYSPMFDYEVRLV-LAPDHPLAAKTRITPEDLASETLLIYP 193
PBP2_TdcA cd08418
The C-terminal substrate binding domain of LysR-type transcriptional regulator TdcA, which is ...
94-195 2.36e-05

The C-terminal substrate binding domain of LysR-type transcriptional regulator TdcA, which is involved in the degradation of L-serine and L-threonine, contains the type 2 periplasmic binding fold; TdcA, a member of the LysR family, activates the expression of the anaerobically-regulated tdcABCDEFG operon which is involved in the degradation of L-serine and L-threonine to acetate and propionate, respectively. The tdc operon is comprised of one regulatory gene tdcA and six structural genes, tdcB to tdcG. The expression of the tdc operon is affected by several transcription factors including the cAMP receptor protein (CRP), integration host factor (IHF), histone-like protein (HU), and the operon specific regulators TdcA and TcdR. TcdR is divergently transcribed from the operon and encodes a small protein that is required for efficient expression of the Escherichia coli tdc operon. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176110 [Multi-domain]  Cd Length: 201  Bit Score: 44.27  E-value: 2.36e-05
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  94 SIGITSSDAfHPKIFALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSK---VFElKILDREPMVVA 170
Cdd:cd08418    3 SIGVSSLIA-HTLMPAVINRFKEQFPDVQISIYEGQLSSLLPELRDGRLDFAIGTLPDEMYLkelISE-PLFESDFVVVA 80
                         90       100
                 ....*....|....*....|....*
gi 505384093 171 lHRDHPLAACGDlaLDELRDTPVVL 195
Cdd:cd08418   81 -RKDHPLQGARS--LEELLDASWVL 102
leuO PRK09508
leucine transcriptional activator; Reviewed
2-58 3.91e-05

leucine transcriptional activator; Reviewed


Pssm-ID: 181918 [Multi-domain]  Cd Length: 314  Bit Score: 44.24  E-value: 3.91e-05
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|....*..
gi 505384093   2 ELRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRLTRGVELT 58
Cdd:PRK09508  23 DLNLLTVFDAVMQEQNITRAAHNLGMSQPAVSNAVARLKVMFNDELFVRYGRGIQPT 79
PBP2_MdcR cd08416
The C-terminal substrate-binding domian of LysR-type transcriptional regulator MdcR, which ...
125-264 5.98e-05

The C-terminal substrate-binding domian of LysR-type transcriptional regulator MdcR, which involved in the malonate catabolism contains the type 2 periplasmic binding fold; This family includes the C-terminal substrate binding domain of LysR-type transcriptional regulator (LTTR) MdcR that controls the expression of the malonate decarboxylase (mdc) genes. Like other members of the LTTRs, MdcR is a positive regulatory protein for its target promoter and composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins (PBP2). The PBP2 are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate- binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction.


Pssm-ID: 176108  Cd Length: 199  Bit Score: 43.10  E-value: 5.98e-05
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 125 QVEANMSS---LTTMLAEGELDIAFVRLP-------CESSKVFELKILdrepmvVALHRDHPLAACGDLALDELRDTPVV 194
Cdd:cd08416   30 DIELTLGSnkdLLKKLKDGELDAILVATPeglndpdFEVVPLFEDDIF------LAVPATSPLAASSEIDLRDLKDEKFV 103
                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|.
gi 505384093 195 LFPQEVAPGL-YDRVYgscERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAAISPPNVTYHALRSP 264
Cdd:cd08416  104 TLSEGFATYRgFDEAF---EIAGFEPNVVMRVNDIFSLMSMVSGGVGYALLPGRIADVYEDKVQLIPLAEP 171
PBP2_Nac cd08433
The C-teminal substrate binding domain of LysR-like nitrogen assimilation control (NAC) ...
92-274 6.89e-05

The C-teminal substrate binding domain of LysR-like nitrogen assimilation control (NAC) protein, contains the type 2 periplasmic binding fold; The NAC is a LysR-type transcription regulator that activates expression of operons such as hut (histidine utilization) and ure (urea utilization), allowing use of non-preferred (poor) nitrogen sources, and represses expression of operons, such as glutamate dehydrogenase (gdh), allowing assimilation of the preferred nitrogen source. The expression of the nac gene is fully dependent on the nitrogen regulatory system (NTR) and the sigma54-containing RNA polymerase (sigma54-RNAP). In response to nitrogen starvation, NTR system activates the expression of nac, and NAC activates the expression of hut, ure, and put (proline utilization). NAC is not involved in the transcription of Sigma70-RNAP operons such as glnA, which directly respond by the NTR system, but activates the transcription of sigma70-RNAP dependent operons such as hut. Hence, NAC allows the coupling of sigma70-RNAP dependent operons to the sigma54-RNAP dependent NTR system. This substrate-binding domain has significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176124  Cd Length: 198  Bit Score: 42.97  E-value: 6.89e-05
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAfhPKIFA-LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPcESSKVFELKILDREPMVVA 170
Cdd:cd08433    1 RVSVGLPPSAA--SVLAVpLLRAVRRRYPGIRLRIVEGLSGHLLEWLLNGRLDLALLYGP-PPIPGLSTEPLLEEDLFLV 77
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 171 LHRDHPLAACGDLALDELRDTPVVLfPqEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAA 250
Cdd:cd08433   78 GPADAPLPRGAPVPLAELARLPLIL-P-SRGHGLRRLVDEAAARAGLTLNVVVEIDSVATLKALVAAGLGYTILPASAVA 155
                        170       180
                 ....*....|....*....|....*.
gi 505384093 251 ISPPNVTYHALR--SPELYTDIALCW 274
Cdd:cd08433  156 AEVAAGRLVAAPivDPALTRTLSLAT 181
PBP2_PAO1_like cd08412
The C-terminal substrate-binding domain of putative LysR-type transcriptional regulator ...
93-195 7.00e-05

The C-terminal substrate-binding domain of putative LysR-type transcriptional regulator PAO1-like, a member of the type 2 periplasmic binding fold protein superfamily; This family includes the C-terminal substrate domain of a putative LysR-type transcriptional regulator from the plant pathogen Pseudomonas aeruginosa PAO1and its closely related homologs. The LysR-type transcriptional regulators (LTTRs) are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of N2 fixing bacteria, and synthesis of virulence factors, to a name a few. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate-binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction.


Pssm-ID: 176104 [Multi-domain]  Cd Length: 198  Bit Score: 42.92  E-value: 7.00e-05
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  93 LSIGITSSDA--FHPKifaLIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAF---VRLPCEsskvFELKILDREPM 167
Cdd:cd08412    2 LRIGCFSTLApyYLPG---LLRRFREAYPGVEVRVVEGNQEELEEGLRSGELDLALtydLDLPED----IAFEPLARLPP 74
                         90       100
                 ....*....|....*....|....*...
gi 505384093 168 VVALHRDHPLAACGDLALDELRDTPVVL 195
Cdd:cd08412   75 YVWLPADHPLAGKDEVSLADLAAEPLIL 102
PBP2_GbpR cd08435
The C-terminal substrate binding domain of galactose-binding protein regulator contains the ...
133-250 1.70e-04

The C-terminal substrate binding domain of galactose-binding protein regulator contains the type 2 periplasmic binding fold; Galactose-binding protein regulator (GbpR), a member of the LysR family of bacterial transcriptional regulators, regulates the expression of chromosomal virulence gene chvE. The chvE gene is involved in the uptake of specific sugars, in chemotaxis to these sugars, and in the VirA-VirG two-component signal transduction system. In the presence of an inducing sugar such as L-arabinose, D-fucose, or D-galactose, GbpR activates chvE expression, while in the absence of an inducing sugar, GbpR represses expression. The topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176126 [Multi-domain]  Cd Length: 201  Bit Score: 41.87  E-value: 1.70e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 133 LTTMLAEGELDIAFVRL-PCESSKVFELKILDREPMVVALHRDHPLAACGDLALDELRDTPVVLFPQEVAP-GLYDRVYg 210
Cdd:cd08435   41 LLEGLRAGELDLAIGRLaDDEQPPDLASEELADEPLVVVARPGHPLARRARLTLADLADYPWVLPPPGTPLrQRLEQLF- 119
                         90       100       110       120
                 ....*....|....*....|....*....|....*....|.
gi 505384093 211 scERAGIDM-QHTLQSSQLSSSLSMVSAGGGFALVPKSMAA 250
Cdd:cd08435  120 --AAAGLPLpRNVVETASISALLALLARSDMLAVLPRSVAE 158
PBP2_LTTR_like_1 cd08421
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
109-289 2.63e-04

The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator, contains the type 2 periplasmic binding fold; LysR-transcriptional regulators comprise the largest family of prokaryotic transcription factor. Homologs of some of LTTRs with similar domain organizations are also found in the archaea and eukaryotic organisms. The LTTRs are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to a name a few. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176113  Cd Length: 198  Bit Score: 40.97  E-value: 2.63e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 109 ALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFV--RLPCESSKVFELKildREPMVVALHRDHPLAACGDLALD 186
Cdd:cd08421   17 EDLASFLAAHPDVRIDLEERLSADIVRAVAEGRADLGIVagNVDAAGLETRPYR---TDRLVVVVPRDHPLAGRASVAFA 93
                         90       100       110       120       130       140       150       160
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 187 ELRDTPVVLFPQEVApgLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMAA--ISPPNVTYHALRSP 264
Cdd:cd08421   94 DTLDHDFVGLPAGSA--LHTFLREAAARLGRRLRLRVQVSSFDAVCRMVAAGLGIGIVPESAARryARALGLRVVPLDDA 171
                        170       180
                 ....*....|....*....|....*.
gi 505384093 265 ELYTDIALCWRRFER-SRTVKRFLAM 289
Cdd:cd08421  172 WARRRLLLCVRSFDAlPPAARALVDH 197
PBP2_LTTR_like_5 cd08426
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ...
110-245 3.11e-04

The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator, contains the type 2 periplasmic binding fold; LysR-transcriptional regulators comprise the largest family of prokaryotic transcription factor. Homologs of some of LTTRs with similar domain organizations are also found in the archaea and eukaryotic organisms. The LTTRs are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to a name a few. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176117 [Multi-domain]  Cd Length: 199  Bit Score: 41.14  E-value: 3.11e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 110 LIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDI--AFVRLPCESSKVFELKildREPMVVALHRDHPLAACGDLALDE 187
Cdd:cd08426   18 LIARFRQRYPGVFFTVDVASTADVLEAVLSGEADIglAFSPPPEPGIRVHSRQ---PAPIGAVVPPGHPLARQPSVTLAQ 94
                         90       100       110       120       130
                 ....*....|....*....|....*....|....*....|....*....|....*...
gi 505384093 188 LRDTPVVLFPQEVapGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVP 245
Cdd:cd08426   95 LAGYPLALPPPSF--SLRQILDAAFARAGVQLEPVLISNSIETLKQLVAAGGGISLLT 150
PBP2_OccR cd08457
The C-terminal substrate-domain of LysR-type transcriptional regulator, OccR, involved in the ...
100-249 5.23e-04

The C-terminal substrate-domain of LysR-type transcriptional regulator, OccR, involved in the catabolism of octopine, contains the type 2 periplasmic binding fold; This CD includes the C-terminal substrate-domain of LysR-type transcriptional regulator OccR, which is involved in the catabolism of octopine. Opines are low molecular weight compounds found in plant crown gall tumors produced by the parasitic bacterium Agrobacterium. There are at least 30 different opines identified so far. Opines are utilized by tumor-colonizing bacteria as a source of carbon, nitrogen, and energy. In Agrobacterium tumefaciens, OccR protein activates the occQ operon of the Ti plasmid in response to octopine. This operon encodes proteins required for the uptake and catabolism of octopine, an arginine derivative. The occ operon also encodes the TraR protein, which is a quorum-sensing transcriptional regulator of the Ti plasmid tra regulon. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176146 [Multi-domain]  Cd Length: 196  Bit Score: 40.17  E-value: 5.23e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 100 SDAFHPKIFAlirQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPCESSKVFeLKILDREPMVVALHRDHPLAA 179
Cdd:cd08457   11 ANGFLPRFLA---AFLRLRPNLHLSLMGLSSSQVLEAVASGRADLGIADGPLEERQGF-LIETRSLPAVVAVPMGHPLAQ 86
                         90       100       110       120       130       140       150
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 180 CGDLALDELRDTPVVlfPQEVAPGLYDRVYGSCERAGIDMQHTLQSSQLSSSLSMVSAGGGFALVPKSMA 249
Cdd:cd08457   87 LDVVSPQDLAGERII--TLENGYLFRMRVEVALGKIGVKRRPIIEVNLSHTALSLVREGLGIAIIDPATA 154
PBP2_MleR cd08437
The substrate binding domain of LysR-type transcriptional regulator MleR which required for ...
101-190 7.75e-04

The substrate binding domain of LysR-type transcriptional regulator MleR which required for malolactic fermentation, contains type 2 periplasmic binidning fold; MleR, a transcription activator of malolactic fermentation system, is found in gram-positive bacteria and belongs to the lysR family of bacterial transcriptional regulators. The mleR gene is required for the expression and induction of malolactic fermentation. This substrate binding domain has significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176128  Cd Length: 198  Bit Score: 39.62  E-value: 7.75e-04
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 101 DAFHPKifaLIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFV--RLPCESSKVFELKILDREPMVVaLHRDHPLA 178
Cdd:cd08437   12 NYYFPK---LAKDLIKTGLMIQIDTYEGGSAELLEQLLQGDLDIALLgsLTPLENSALHSKIIKTQHFMII-VSKDHPLA 87
                         90
                 ....*....|..
gi 505384093 179 ACGDLALDELRD 190
Cdd:cd08437   88 KAKKVNFADLKK 99
PBP2_CysB_like cd08413
The C-terminal substrate domain of LysR-type transcriptional regulators CysB-like contains ...
92-194 2.47e-03

The C-terminal substrate domain of LysR-type transcriptional regulators CysB-like contains type 2 periplasmic binding fold; CysB is a transcriptional activator of genes involved in sulfate and thiosulfate transport, sulfate reduction, and cysteine synthesis. In Escherichia coli, the regulation of transcription in response to sulfur source is attributed to two transcriptional regulators, CysB and Cbl. CysB, in association with Cbl, downregulates the expression of ssuEADCB operon which is required for the utilization of sulfur from aliphatic sulfonates, in the presence of cysteine. Also, Cbl and CysB together directly function as transcriptional activators of tauABCD genes, which are required for utilization of taurine as sulfur source for growth. Like many other members of the LTTR family, CysB is composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate-binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction.


Pssm-ID: 176105 [Multi-domain]  Cd Length: 198  Bit Score: 38.37  E-value: 2.47e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093  92 SLSIGITSSDAFH--PKIFALIRQfqvQNMAVQVHQVEANMSSLTTMLAEGELDIAFVrlpCESskvfelkiLDREPMVV 169
Cdd:cd08413    1 QLTIATTHTQARYvlPPVIAAFRK---RYPKVKLSLHQGTPSQIAEMVLKGEADIAIA---TEA--------LDDHPDLV 66
                         90       100       110
                 ....*....|....*....|....*....|....*.
gi 505384093 170 AL-----HR------DHPLAACGDLALDELRDTPVV 194
Cdd:cd08413   67 TLpcyrwNHcvivppGHPLADLGPLTLEDLAQYPLI 102
PRK11013 PRK11013
DNA-binding transcriptional regulator LysR; Provisional
3-54 3.34e-03

DNA-binding transcriptional regulator LysR; Provisional


Pssm-ID: 236819 [Multi-domain]  Cd Length: 309  Bit Score: 38.43  E-value: 3.34e-03
                         10        20        30        40        50
                 ....*....|....*....|....*....|....*....|....*....|..
gi 505384093   3 LRYLRYFVAVARERHFTRAAKALGISQPPLSQQIKRLEEEVGTPLFRRlTRG 54
Cdd:PRK11013   6 LRHIEIFHAVMTAGSLTEAARLLHTSQPTVSRELARFEKVIGLKLFER-VRG 56
PBP2_Nitroaromatics_like cd08417
The C-terminal substrate binding domain of LysR-type transcriptional regulators that involved ...
109-188 4.69e-03

The C-terminal substrate binding domain of LysR-type transcriptional regulators that involved in the catabolism of nitroaromatic/naphthalene compounds and that of related regulators; contains the type 2 periplasmic binding fold; This CD includes the C-terminal substrate binding domain of LysR-type transcriptional regulators involved in the catabolism of dinitrotoluene and similar compounds, such as DntR, NahR, and LinR. The transcription of the genes encoding enzymes involved in such degradation is regulated and expression of these enzymes is enhanced by inducers, which are either an intermediate in the metabolic pathway or compounds to be degraded. Also included are related LysR-type regulators clustered together in phylogenetic trees, including NodD, ToxR, LeuO, SyrM, TdcA, and PnbR. This substrate-binding domain shows significant homology to the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis.


Pssm-ID: 176109 [Multi-domain]  Cd Length: 200  Bit Score: 37.58  E-value: 4.69e-03
                         10        20        30        40        50        60        70        80
                 ....*....|....*....|....*....|....*....|....*....|....*....|....*....|....*....|
gi 505384093 109 ALIRQFQVQNMAVQVHQVEANMSSLTTMLAEGELDIAFVRLPcESSKVFELKILDREPMVVALHRDHPLAAcGDLALDEL 188
Cdd:cd08417   17 PLLARLRQEAPGVRLRFVPLDRDDLEEALESGEIDLAIGVFP-ELPPGLRSQPLFEDRFVCVARKDHPLAG-GPLTLEDY 94
 
Blast search parameters
Data Source: Precalculated data, version = cdd.v.3.21
Preset Options:Database: CDSEARCH/cdd   Low complexity filter: no  Composition Based Adjustment: yes   E-value threshold: 0.01

References:

  • Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
  • Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
  • Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
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