MULTISPECIES: LysR family transcriptional regulator [Pseudomonas]
Protein Classification
LysR family transcriptional regulator( domain architecture ID 13284558)
LysR family transcriptional regulator with an N-terminal DNA binding motif and a C-terminal inducer binding domain
List of domain hits
| Name | Accession | Description | Interval | E-value | ||||
| PBP2_YofA_SoxR_like | cd08442 | The C-terminal substrate binding domain of LysR-type transcriptional regulators, YofA and SoxR, ... |
93-281 | 6.04e-83 | ||||
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: 247.91 E-value: 6.04e-83
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| rbcR super family | cl31781 | LysR transcriptional regulator; Provisional |
5-172 | 6.08e-31 | ||||
LysR transcriptional regulator; Provisional The actual alignment was detected with superfamily member CHL00180: Pssm-ID: 177082 [Multi-domain] Cd Length: 305 Bit Score: 117.43 E-value: 6.08e-31
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| Name | Accession | Description | Interval | E-value | |||||
| PBP2_YofA_SoxR_like | cd08442 | The C-terminal substrate binding domain of LysR-type transcriptional regulators, YofA and SoxR, ... |
93-281 | 6.04e-83 | |||||
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: 247.91 E-value: 6.04e-83
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| LysR | COG0583 | DNA-binding transcriptional regulator, LysR family [Transcription]; |
1-281 | 4.78e-61 | |||||
DNA-binding transcriptional regulator, LysR family [Transcription]; Pssm-ID: 440348 [Multi-domain] Cd Length: 256 Bit Score: 194.31 E-value: 4.78e-61
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| LysR_substrate | pfam03466 | LysR substrate binding domain; The structure of this domain is known and is similar to the ... |
88-281 | 1.79e-38 | |||||
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: 134.72 E-value: 1.79e-38
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| rbcR | CHL00180 | LysR transcriptional regulator; Provisional |
5-172 | 6.08e-31 | |||||
LysR transcriptional regulator; Provisional Pssm-ID: 177082 [Multi-domain] Cd Length: 305 Bit Score: 117.43 E-value: 6.08e-31
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| PRK11242 | PRK11242 | DNA-binding transcriptional regulator CynR; Provisional |
1-269 | 3.28e-27 | |||||
DNA-binding transcriptional regulator CynR; Provisional Pssm-ID: 183051 [Multi-domain] Cd Length: 296 Bit Score: 107.35 E-value: 3.28e-27
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| HTH_1 | pfam00126 | Bacterial regulatory helix-turn-helix protein, lysR family; |
3-62 | 4.36e-21 | |||||
Bacterial regulatory helix-turn-helix protein, lysR family; Pssm-ID: 459683 [Multi-domain] Cd Length: 60 Bit Score: 84.36 E-value: 4.36e-21
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| HTH_MARR | smart00347 | helix_turn_helix multiple antibiotic resistance protein; |
3-82 | 4.17e-03 | |||||
helix_turn_helix multiple antibiotic resistance protein; Pssm-ID: 197670 [Multi-domain] Cd Length: 101 Bit Score: 36.03 E-value: 4.17e-03
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| MarR | COG1846 | DNA-binding transcriptional regulator, MarR family [Transcription]; |
1-90 | 8.41e-03 | |||||
DNA-binding transcriptional regulator, MarR family [Transcription]; Pssm-ID: 441451 [Multi-domain] Cd Length: 142 Bit Score: 36.10 E-value: 8.41e-03
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| Name | Accession | Description | Interval | E-value | |||||
| PBP2_YofA_SoxR_like | cd08442 | The C-terminal substrate binding domain of LysR-type transcriptional regulators, YofA and SoxR, ... |
93-281 | 6.04e-83 | |||||
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: 247.91 E-value: 6.04e-83
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| LysR | COG0583 | DNA-binding transcriptional regulator, LysR family [Transcription]; |
1-281 | 4.78e-61 | |||||
DNA-binding transcriptional regulator, LysR family [Transcription]; Pssm-ID: 440348 [Multi-domain] Cd Length: 256 Bit Score: 194.31 E-value: 4.78e-61
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| LysR_substrate | pfam03466 | LysR substrate binding domain; The structure of this domain is known and is similar to the ... |
88-281 | 1.79e-38 | |||||
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: 134.72 E-value: 1.79e-38
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| PBP2_LTTR_substrate | cd05466 | The substrate binding domain of LysR-type transcriptional regulators (LTTRs), a member of the ... |
93-281 | 2.17e-37 | |||||
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: 131.57 E-value: 2.17e-37
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| rbcR | CHL00180 | LysR transcriptional regulator; Provisional |
5-172 | 6.08e-31 | |||||
LysR transcriptional regulator; Provisional Pssm-ID: 177082 [Multi-domain] Cd Length: 305 Bit Score: 117.43 E-value: 6.08e-31
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| PRK11242 | PRK11242 | DNA-binding transcriptional regulator CynR; Provisional |
1-269 | 3.28e-27 | |||||
DNA-binding transcriptional regulator CynR; Provisional Pssm-ID: 183051 [Multi-domain] Cd Length: 296 Bit Score: 107.35 E-value: 3.28e-27
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| PBP2_LTTR_aromatics_like | cd08414 | The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ... |
91-281 | 7.38e-26 | |||||
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: 101.04 E-value: 7.38e-26
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| HTH_1 | pfam00126 | Bacterial regulatory helix-turn-helix protein, lysR family; |
3-62 | 4.36e-21 | |||||
Bacterial regulatory helix-turn-helix protein, lysR family; Pssm-ID: 459683 [Multi-domain] Cd Length: 60 Bit Score: 84.36 E-value: 4.36e-21
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| PBP2_LTTR_like_3 | cd08436 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
93-252 | 5.04e-20 | |||||
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: 85.73 E-value: 5.04e-20
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| PRK11233 | PRK11233 | nitrogen assimilation transcriptional regulator; Provisional |
1-244 | 2.37e-19 | |||||
nitrogen assimilation transcriptional regulator; Provisional Pssm-ID: 183045 [Multi-domain] Cd Length: 305 Bit Score: 85.89 E-value: 2.37e-19
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| PRK12682 | PRK12682 | transcriptional regulator CysB-like protein; Reviewed |
1-269 | 2.52e-19 | |||||
transcriptional regulator CysB-like protein; Reviewed Pssm-ID: 183679 [Multi-domain] Cd Length: 309 Bit Score: 86.20 E-value: 2.52e-19
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| PBP2_LysR_opines_like | cd08415 | The C-terminal substrate-domain of LysR-type transcriptional regulators involved in the ... |
93-269 | 8.49e-19 | |||||
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: 82.22 E-value: 8.49e-19
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| PRK09906 | PRK09906 | DNA-binding transcriptional regulator HcaR; Provisional |
1-172 | 4.51e-18 | |||||
DNA-binding transcriptional regulator HcaR; Provisional Pssm-ID: 182137 [Multi-domain] Cd Length: 296 Bit Score: 82.51 E-value: 4.51e-18
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| PRK09986 | PRK09986 | LysR family transcriptional regulator; |
6-238 | 1.03e-17 | |||||
LysR family transcriptional regulator; Pssm-ID: 182183 [Multi-domain] Cd Length: 294 Bit Score: 81.31 E-value: 1.03e-17
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| PRK12680 | PRK12680 | LysR family transcriptional regulator; |
1-263 | 4.58e-17 | |||||
LysR family transcriptional regulator; Pssm-ID: 183677 [Multi-domain] Cd Length: 327 Bit Score: 80.05 E-value: 4.58e-17
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| PRK10094 | PRK10094 | HTH-type transcriptional activator AllS; |
6-288 | 6.11e-17 | |||||
HTH-type transcriptional activator AllS; Pssm-ID: 182237 [Multi-domain] Cd Length: 308 Bit Score: 79.47 E-value: 6.11e-17
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| PBP2_LTTR_like_4 | cd08440 | TThe C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
98-269 | 9.40e-17 | |||||
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: 76.80 E-value: 9.40e-17
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| PBP2_CysL_like | cd08420 | C-terminal substrate binding domain of LysR-type transcriptional regulator CysL, which ... |
104-281 | 1.01e-16 | |||||
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: 76.76 E-value: 1.01e-16
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| PBP2_Nac | cd08433 | The C-teminal substrate binding domain of LysR-like nitrogen assimilation control (NAC) ... |
98-261 | 1.05e-16 | |||||
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: 76.48 E-value: 1.05e-16
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| PRK12683 | PRK12683 | transcriptional regulator CysB-like protein; Reviewed |
1-269 | 2.15e-16 | |||||
transcriptional regulator CysB-like protein; Reviewed Pssm-ID: 237172 [Multi-domain] Cd Length: 309 Bit Score: 77.78 E-value: 2.15e-16
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| PRK10837 | PRK10837 | putative DNA-binding transcriptional regulator; Provisional |
5-177 | 7.92e-16 | |||||
putative DNA-binding transcriptional regulator; Provisional Pssm-ID: 182768 [Multi-domain] Cd Length: 290 Bit Score: 75.88 E-value: 7.92e-16
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| PBP2_OccR | cd08457 | The C-terminal substrate-domain of LysR-type transcriptional regulator, OccR, involved in the ... |
92-254 | 1.45e-15 | |||||
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: 73.68 E-value: 1.45e-15
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| PRK15421 | PRK15421 | HTH-type transcriptional regulator MetR; |
1-201 | 6.93e-15 | |||||
HTH-type transcriptional regulator MetR; Pssm-ID: 185319 [Multi-domain] Cd Length: 317 Bit Score: 73.51 E-value: 6.93e-15
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| PRK12684 | PRK12684 | CysB family HTH-type transcriptional regulator; |
1-172 | 4.26e-14 | |||||
CysB family HTH-type transcriptional regulator; Pssm-ID: 237173 [Multi-domain] Cd Length: 313 Bit Score: 71.16 E-value: 4.26e-14
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| PBP2_GltC_like | cd08434 | The substrate binding domain of LysR-type transcriptional regulator GltC, which activates gltA ... |
93-269 | 6.20e-14 | |||||
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: 68.72 E-value: 6.20e-14
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| PBP2_OxyR | cd08411 | The C-terminal substrate-binding domain of the LysR-type transcriptional regulator OxyR, a ... |
104-269 | 8.32e-14 | |||||
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: 68.71 E-value: 8.32e-14
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| PRK11013 | PRK11013 | DNA-binding transcriptional regulator LysR; Provisional |
5-233 | 1.11e-13 | |||||
DNA-binding transcriptional regulator LysR; Provisional Pssm-ID: 236819 [Multi-domain] Cd Length: 309 Bit Score: 70.02 E-value: 1.11e-13
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| PRK11074 | PRK11074 | putative DNA-binding transcriptional regulator; Provisional |
6-142 | 3.28e-13 | |||||
putative DNA-binding transcriptional regulator; Provisional Pssm-ID: 182948 [Multi-domain] Cd Length: 300 Bit Score: 68.43 E-value: 3.28e-13
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| PBP2_GbpR | cd08435 | The C-terminal substrate binding domain of galactose-binding protein regulator contains the ... |
94-269 | 3.65e-13 | |||||
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: 66.91 E-value: 3.65e-13
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| PBP2_LTTR_aromatics_like_1 | cd08447 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
91-268 | 1.91e-12 | |||||
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: 64.98 E-value: 1.91e-12
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| PRK09791 | PRK09791 | LysR family transcriptional regulator; |
1-172 | 2.15e-12 | |||||
LysR family transcriptional regulator; Pssm-ID: 182077 [Multi-domain] Cd Length: 302 Bit Score: 66.32 E-value: 2.15e-12
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| PRK15092 | PRK15092 | DNA-binding transcriptional repressor LrhA; Provisional |
6-142 | 6.01e-12 | |||||
DNA-binding transcriptional repressor LrhA; Provisional Pssm-ID: 237907 [Multi-domain] Cd Length: 310 Bit Score: 65.05 E-value: 6.01e-12
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| PBP2_LTTR_like_1 | cd08421 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
98-269 | 6.49e-12 | |||||
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: 63.31 E-value: 6.49e-12
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| PBP2_Nitroaromatics_like | cd08417 | The C-terminal substrate binding domain of LysR-type transcriptional regulators that involved ... |
91-268 | 1.02e-11 | |||||
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: 62.62 E-value: 1.02e-11
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| PRK13348 | PRK13348 | HTH-type transcriptional regulator ArgP; |
4-88 | 1.07e-11 | |||||
HTH-type transcriptional regulator ArgP; Pssm-ID: 237357 [Multi-domain] Cd Length: 294 Bit Score: 64.22 E-value: 1.07e-11
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| PBP2_LTTR_like_6 | cd08423 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
93-256 | 2.80e-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: 61.46 E-value: 2.80e-11
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| PRK11151 | PRK11151 | DNA-binding transcriptional regulator OxyR; Provisional |
11-269 | 5.55e-11 | |||||
DNA-binding transcriptional regulator OxyR; Provisional Pssm-ID: 182999 [Multi-domain] Cd Length: 305 Bit Score: 61.97 E-value: 5.55e-11
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| PBP2_BudR | cd08451 | The C-terminal substrate binding domain of LysR-type transcrptional regulator BudR, which is ... |
98-281 | 7.49e-11 | |||||
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: 60.27 E-value: 7.49e-11
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| PRK10086 | PRK10086 | DNA-binding transcriptional regulator DsdC; |
3-122 | 8.68e-11 | |||||
DNA-binding transcriptional regulator DsdC; Pssm-ID: 182231 [Multi-domain] Cd Length: 311 Bit Score: 61.56 E-value: 8.68e-11
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| cbl | PRK12679 | HTH-type transcriptional regulator Cbl; |
1-274 | 2.50e-10 | |||||
HTH-type transcriptional regulator Cbl; Pssm-ID: 183676 [Multi-domain] Cd Length: 316 Bit Score: 60.21 E-value: 2.50e-10
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| PRK03635 | PRK03635 | ArgP/LysG family DNA-binding transcriptional regulator; |
1-87 | 2.56e-10 | |||||
ArgP/LysG family DNA-binding transcriptional regulator; Pssm-ID: 235144 [Multi-domain] Cd Length: 294 Bit Score: 59.79 E-value: 2.56e-10
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| PBP2_LTTR_like_2 | cd08427 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
91-269 | 5.47e-10 | |||||
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: 176118 [Multi-domain] Cd Length: 195 Bit Score: 57.58 E-value: 5.47e-10
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| PBP2_CidR | cd08438 | The C-terminal substrate binding domain of LysR-like transcriptional regulator CidR, contains ... |
104-281 | 8.97e-10 | |||||
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: 57.18 E-value: 8.97e-10
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| PRK11139 | PRK11139 | DNA-binding transcriptional activator GcvA; Provisional |
6-182 | 9.63e-10 | |||||
DNA-binding transcriptional activator GcvA; Provisional Pssm-ID: 182990 [Multi-domain] Cd Length: 297 Bit Score: 58.32 E-value: 9.63e-10
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| PRK03601 | PRK03601 | HTH-type transcriptional regulator HdfR; |
20-79 | 1.28e-09 | |||||
HTH-type transcriptional regulator HdfR; Pssm-ID: 235137 [Multi-domain] Cd Length: 275 Bit Score: 57.72 E-value: 1.28e-09
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| PRK11716 | PRK11716 | HTH-type transcriptional activator IlvY; |
26-250 | 1.59e-09 | |||||
HTH-type transcriptional activator IlvY; Pssm-ID: 236961 [Multi-domain] Cd Length: 269 Bit Score: 57.52 E-value: 1.59e-09
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| PBP2_CynR | cd08425 | The C-terminal substrate-binding domain of the LysR-type transcriptional regulator CynR, ... |
107-269 | 1.84e-09 | |||||
The C-terminal substrate-binding domain of the LysR-type transcriptional regulator CynR, contains the type 2 periplasmic binding fold; CynR is a LysR-like transcriptional regulator of the cyn operon, which encodes genes that allow cyanate to be used as a sole source of nitrogen. The operon includes three genes in the following order: cynT (cyanate permease), cynS (cyanase), and cynX (a protein of unknown function). CynR negatively regulates its own expression independently of cyanate. CynR binds to DNA and induces bending of DNA in the presence or absence of cyanate, but the amount of bending is decreased by cyanate. The CynR 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 (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. Pssm-ID: 176116 Cd Length: 197 Bit Score: 56.18 E-value: 1.84e-09
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| PRK10341 | PRK10341 | transcriptional regulator TdcA; |
5-142 | 2.91e-09 | |||||
transcriptional regulator TdcA; Pssm-ID: 182391 [Multi-domain] Cd Length: 312 Bit Score: 57.18 E-value: 2.91e-09
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| PRK14997 | PRK14997 | LysR family transcriptional regulator; Provisional |
9-124 | 2.98e-09 | |||||
LysR family transcriptional regulator; Provisional Pssm-ID: 184959 [Multi-domain] Cd Length: 301 Bit Score: 56.92 E-value: 2.98e-09
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| PBP2_IlvR | cd08453 | The C-terminal substrate binding domain of LysR-type transcriptional regulator, IlvR, involved ... |
104-281 | 2.54e-08 | |||||
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: 53.13 E-value: 2.54e-08
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| PBP2_LTTR_aromatics_like_2 | cd08448 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
91-280 | 3.67e-08 | |||||
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: 52.65 E-value: 3.67e-08
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| PBP2_HcaR | cd08450 | The C-terminal substrate binding domain of LysR-type transcriptional regulator HcaR in ... |
91-269 | 4.23e-08 | |||||
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: 52.38 E-value: 4.23e-08
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| PBP2_BenM_CatM_CatR | cd08445 | The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ... |
91-269 | 5.31e-08 | |||||
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: 52.23 E-value: 5.31e-08
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| PBP2_PAO1_like | cd08412 | The C-terminal substrate-binding domain of putative LysR-type transcriptional regulator ... |
92-270 | 5.39e-08 | |||||
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: 52.16 E-value: 5.39e-08
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| PBP2_CbbR_RubisCO_like | cd08419 | The C-terminal substrate binding of LysR-type transcriptional regulator (CbbR) of RubisCO ... |
98-235 | 2.39e-06 | |||||
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: 47.12 E-value: 2.39e-06
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| PRK10632 | PRK10632 | HTH-type transcriptional activator AaeR; |
1-134 | 3.58e-06 | |||||
HTH-type transcriptional activator AaeR; Pssm-ID: 182601 [Multi-domain] Cd Length: 309 Bit Score: 47.45 E-value: 3.58e-06
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| PBP2_CrgA_like | cd08422 | The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA and its ... |
103-240 | 4.37e-06 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA and its related homologs, contains the type 2 periplasmic binding domain; This CD includes the substrate binding domain of LysR-type transcriptional regulator (LTTR) CrgA and its related homologs. The LTTRs are acting as both auto-repressors and activators of target promoters, controlling operons involved in a wide variety of cellular processes such as amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to name a few. In contrast to the tetrameric form of other LTTRs, CrgA from Neisseria meningitides assembles into an octameric ring, which can bind up to four 63-bp DNA oligonucleotides. Phylogenetic cluster analysis further showed that the CrgA-like regulators form a subclass of the LTTRs that function as octamers. The CrgA is an auto-repressor of its own gene and activates the expression of the mdaB gene which coding for an NADPH-quinone reductase and that its action is increased by MBL (alpha-methylene-gamma-butyrolactone), an inducer of NADPH-quinone oxidoreductase. 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: 176114 [Multi-domain] Cd Length: 197 Bit Score: 46.28 E-value: 4.37e-06
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| PBP2_AlsR | cd08452 | The C-terminal substrate binding domain of LysR-type trnascriptional regulator AlsR, which ... |
91-281 | 8.44e-06 | |||||
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: 45.57 E-value: 8.44e-06
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| PRK10082 | PRK10082 | hypochlorite stress DNA-binding transcriptional regulator HypT; |
32-170 | 9.06e-06 | |||||
hypochlorite stress DNA-binding transcriptional regulator HypT; Pssm-ID: 182228 [Multi-domain] Cd Length: 303 Bit Score: 46.20 E-value: 9.06e-06
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| PBP2_LrhA_like | cd08439 | The C-terminal substrate domain of LysR-like regulator LrhA (LysR homologue A) and that of ... |
92-239 | 1.81e-05 | |||||
The C-terminal substrate domain of LysR-like regulator LrhA (LysR homologue A) and that of closely related homologs, contains the type 2 periplasmic binding fold; This CD represents the LrhA subfamily of LysR-like bacterial transcriptional regulators, including LrhA, HexA, PecT, and DgdR. LrhA is involved in control of the transcription of flagellar, motility, and chemotaxis genes by regulating the synthesis and concentration of FlhD(2)C(2), the master regulator for the expression of flagellar and chemotaxis genes. The LrhA protein has strong homology to HexA and PecT from plant pathogenic bacteria, in which HexA and PecT act as repressors of motility and of virulence factors, such as exoenzymes required for lytic reactions. DgdR also shares similar characteristics to those of LrhA, HexA and PecT. 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: 176130 Cd Length: 185 Bit Score: 44.63 E-value: 1.81e-05
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| PBP2_PnbR | cd08469 | The C-terminal substrate binding domain of LysR-type transcriptional regulator PnbR, which is ... |
88-177 | 1.90e-05 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulator PnbR, which is involved in regulating the pnb genes encoding enzymes for 4-nitrobenzoate catabolism, contains the type 2 periplasmic binding fold; PnbR is the regulator of one or both of the two pnb genes that encoding enzymes for 4-nitrobenzoate catabolism. In Pseudomonas putida strain, pnbA encodes a 4-nitrobenzoate reductase, which is responsible for catalyzing the direct reduction of 4-nitrobenzoate to 4-hydroxylaminobenzoate, and pnbB encodes a 4-hydroxylaminobenzoate lyase, which catalyzes the conversion of 4-hydroxylaminobenzoate to 3, 4-dihydroxybenzoic acid and ammonium. 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: 176158 Cd Length: 221 Bit Score: 44.70 E-value: 1.90e-05
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| PBP2_DntR_NahR_LinR_like | cd08459 | The C-terminal substrate binding domain of LysR-type transcriptional regulators that are ... |
104-177 | 2.37e-05 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulators that are involved in the catabolism of dinitrotoluene, naphthalene and gamma-hexachlorohexane; contains the type 2 periplasmic binding fold; This CD includes LysR-like bacterial transcriptional regulators, DntR, NahR, and LinR, which are involved in the degradation of aromatic compounds. 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. DntR from Burkholderia species controls genes encoding enzymes for oxidative degradation of the nitro-aromatic compound 2,4-dinitrotoluene. The active form of DntR is homotetrameric, consisting of a dimer of dimers. NahR is a salicylate-dependent transcription activator of the nah and sal operons for naphthalene degradation. Salicylic acid is an intermediate of the oxidative degradation of the aromatic ring in soil bacteria. LinR positively regulates expression of the genes (linD and linE) encoding enzymes for gamma-hexachlorocyclohexane (a haloorganic insecticide) degradation. Expression of linD and linE are induced by their substrates, 2,5-dichlorohydroquinone (2,5-DCHQ) and chlorohydroquinone (CHQ). 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: 176148 [Multi-domain] Cd Length: 201 Bit Score: 44.49 E-value: 2.37e-05
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| PBP2_CrgA | cd08478 | The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA, contains ... |
107-182 | 2.73e-05 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA, contains the type 2 periplasmic binding domain; This CD represents the substrate binding domain of LysR-type transcriptional regulator (LTTR) CrgA. The LTTRs are acting as both auto-repressors and activators of target promoters, controlling operons involved in a wide variety of cellular processes such as amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to name a few. In contrast to the tetrameric form of other LTTRs, CrgA from Neisseria meningitides assembles into an octameric ring, which can bind up to four 63-bp DNA oligonucleotides. Phylogenetic cluster analysis further showed that the CrgA-like regulators form a subclass of the LTTRs that function as octamers. The CrgA is an auto-repressor of its own gene and activates the expression of the mdaB gene which coding for an NADPH-quinone reductase and that its action is increased by MBL (alpha-methylene-gamma-butyrolactone), an inducer of NADPH-quinone oxidoreductase. 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: 176167 [Multi-domain] Cd Length: 199 Bit Score: 44.25 E-value: 2.73e-05
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| PBP2_MleR | cd08437 | The substrate binding domain of LysR-type transcriptional regulator MleR which required for ... |
104-172 | 3.94e-05 | |||||
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: 43.48 E-value: 3.94e-05
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| cysB | PRK12681 | HTH-type transcriptional regulator CysB; |
1-152 | 3.96e-05 | |||||
HTH-type transcriptional regulator CysB; Pssm-ID: 183678 [Multi-domain] Cd Length: 324 Bit Score: 44.50 E-value: 3.96e-05
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| PBP2_Chlorocatechol | cd08446 | The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ... |
104-244 | 7.50e-05 | |||||
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: 42.65 E-value: 7.50e-05
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| nhaR | PRK11062 | transcriptional activator NhaR; Provisional |
3-77 | 8.38e-05 | |||||
transcriptional activator NhaR; Provisional Pssm-ID: 182938 [Multi-domain] Cd Length: 296 Bit Score: 43.46 E-value: 8.38e-05
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| PBP2_ToxR | cd08465 | The C-terminal substrate binding domain of LysR-type transcriptional regulator ToxR regulates ... |
95-217 | 1.65e-04 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulator ToxR regulates the expression of the toxoflavin biosynthesis genes; contains the type 2 periplasmic bindinig fold; In soil bacterium Burkholderia glumae, ToxR regulates the toxABCDE and toxFGHI operons in the presence of toxoflavin as a coinducer. Additionally, the expression of both operons requires a transcriptional activator, ToxJ, whose expression is regulated by the TofI or TofR quorum-sensing system. The biosynthesis of toxoflavin is suggested to be synthesized in a pathway common to the synthesis of riboflavin. 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: 176154 Cd Length: 200 Bit Score: 41.91 E-value: 1.65e-04
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| PBP2_LysR | cd08456 | The C-terminal substrate binding domain of LysR, transcriptional regulator for lysine ... |
104-261 | 3.15e-04 | |||||
The C-terminal substrate binding domain of LysR, transcriptional regulator for lysine biosynthesis, contains the type 2 periplasmic binding fold; LysR, the transcriptional activator of lysA encoding diaminopimelate decarboxylase, catalyses the decarboxylation of diaminopimelate to produce lysine. The 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: 176145 [Multi-domain] Cd Length: 196 Bit Score: 40.87 E-value: 3.15e-04
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| PBP2_CysB_like | cd08413 | The C-terminal substrate domain of LysR-type transcriptional regulators CysB-like contains ... |
91-269 | 3.70e-04 | |||||
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: 40.68 E-value: 3.70e-04
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| PBP_like_2 | pfam12849 | PBP superfamily domain; This domain belongs to the periplasmic binding protein superfamily. |
81-149 | 3.92e-04 | |||||
PBP superfamily domain; This domain belongs to the periplasmic binding protein superfamily. Pssm-ID: 432831 [Multi-domain] Cd Length: 267 Bit Score: 41.38 E-value: 3.92e-04
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| PBP2_IlvY | cd08430 | The C-terminal substrate binding of LysR-type transcriptional regulator IlvY, which activates ... |
95-250 | 5.08e-04 | |||||
The C-terminal substrate binding of LysR-type transcriptional regulator IlvY, which activates the expression of ilvC gene that encoding acetohydroxy acid isomeroreductase for the biosynthesis of branched amino acids; contains the type 2 periplasmic bindin; In Escherichia coli, IlvY is required for the regulation of ilvC gene expression that encodes acetohydroxy acid isomeroreductase (AHIR), a key enzyme in the biosynthesis of branched-chain amino acids (isoleucine, valine, and leucine). The ilvGMEDA operon genes encode remaining enzyme activities required for the biosynthesis of these amino acids. Activation of ilvC transcription by IlvY requires the additional binding of a co-inducer molecule (either alpha-acetolactate or alpha-acetohydoxybutyrate, the substrates for AHIR) to a preformed complex of IlvY protein-DNA. Like many other LysR-family members, IlvY negatively auto-regulates the transcription of its own divergently transcribed ilvY gene in an inducer-independent manner. 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: 176121 Cd Length: 199 Bit Score: 40.26 E-value: 5.08e-04
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| PBP2_TdcA | cd08418 | The C-terminal substrate binding domain of LysR-type transcriptional regulator TdcA, which is ... |
104-172 | 5.51e-04 | |||||
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: 40.41 E-value: 5.51e-04
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| PBP2_BlaA | cd08487 | The C-terminal substrate-binding domain of LysR-type trnascriptional regulator BlaA which ... |
104-269 | 6.40e-04 | |||||
The C-terminal substrate-binding domain of LysR-type trnascriptional regulator BlaA which involved in control of the beta-lactamase gene expression; contains the type 2 periplasmic binding fold; This CD represents the C-terminal substrate binding domain of LysR-type transcriptional regulator, BlaA, that involved in control of the expression of beta-lactamase genes, blaA and blaB. Beta-lactamases are responsible for bacterial resistance to beta-lactam antibiotics such as penicillins. The blaA gene is located just upstream of blaB in the opposite direction and regulates the expression of the blaB. BlaA also negatively auto-regulates the expression of its own gene, blaA. BlaA (a constitutive class A penicllinase) belongs to the LysR family of transcriptional regulators, whereas BlaB (an inducible class C cephalosporinase or AmpC) can be referred to as a penicillin binding protein but it does not act as a beta-lactamase. 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: 176176 [Multi-domain] Cd Length: 189 Bit Score: 39.84 E-value: 6.40e-04
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| PBP2_GcdR_TrpI_HvrB_AmpR_like | cd08432 | The C-terminal substrate domain of LysR-type GcdR, TrPI, HvR and beta-lactamase regulators, ... |
95-240 | 7.75e-04 | |||||
The C-terminal substrate domain of LysR-type GcdR, TrPI, HvR and beta-lactamase regulators, and that of other closely related homologs; contains the type 2 periplasmic binding fold; This CD includes the C-terminal substrate domain of LysR-type transcriptional regulators involved in controlling the expression of glutaryl-CoA dehydrogenase (GcdH), S-adenosyl-L-homocysteine hydrolase, cell division protein FtsW, tryptophan synthase, and beta-lactamase. 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: 176123 [Multi-domain] Cd Length: 194 Bit Score: 39.87 E-value: 7.75e-04
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| PBP2_DntR_like_4 | cd08463 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
100-177 | 8.97e-04 | |||||
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator similar to DntR, which is involved in the catabolism of dinitrotoluene; contains the type 2 periplasmic binding fold; This CD includes an uncharacterized LysR-type transcriptional regulator similar to DntR, NahR, and LinR, which are involved in the degradation of aromatic compounds. 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: 176152 [Multi-domain] Cd Length: 203 Bit Score: 39.60 E-value: 8.97e-04
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| HisJ | COG0834 | ABC-type amino acid transport/signal transduction system, periplasmic component/domain [Amino ... |
118-285 | 9.33e-04 | |||||
ABC-type amino acid transport/signal transduction system, periplasmic component/domain [Amino acid transport and metabolism, Signal transduction mechanisms]; Pssm-ID: 440596 [Multi-domain] Cd Length: 223 Bit Score: 39.58 E-value: 9.33e-04
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| HTH_30 | pfam13556 | PucR C-terminal helix-turn-helix domain; This helix-turn-helix domain is often found at the ... |
6-58 | 1.16e-03 | |||||
PucR C-terminal helix-turn-helix domain; This helix-turn-helix domain is often found at the C-terminus of PucR-like transcriptional regulators such as Swiss:O32138 and is likely to be DNA-binding. Pssm-ID: 433305 [Multi-domain] Cd Length: 56 Bit Score: 36.28 E-value: 1.16e-03
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| PBP2_LTTR_like_5 | cd08426 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
98-236 | 1.61e-03 | |||||
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: 38.83 E-value: 1.61e-03
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| PBP2_DntR_like_3 | cd08461 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
97-181 | 2.84e-03 | |||||
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator similar to DntR, which is involved in the catabolism of dinitrotoluene; contains the type 2 periplasmic binding fold; This CD includes an uncharacterized LysR-type transcriptional regulator similar to DntR, NahR, and LinR, which are involved in the degradation of aromatic compounds. 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: 176150 [Multi-domain] Cd Length: 198 Bit Score: 38.03 E-value: 2.84e-03
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| PBP2_LTTR_beta_lactamase | cd08484 | The C-terminal substrate-domain of LysR-type transcriptional regulators for beta-lactamase ... |
104-269 | 2.94e-03 | |||||
The C-terminal substrate-domain of LysR-type transcriptional regulators for beta-lactamase genes, contains the type 2 periplasmic binding fold; This CD includes the C-terminal substrate binding domain of LysR-type transcriptional regulators, BlaA and AmpR, that are involved in control of the expression of beta-lactamase genes. Beta-lactamases are responsible for bacterial resistance to beta-lactam antibiotics such as penicillins. BlaA (a constitutive class A penicillinase) belongs to the LysR family of transcriptional regulators, while BlaB (an inducible class C cephalosporinase or AmpC) can be referred to as a penicillin-binding protein, but it does not act as a beta-lactamase. AmpR regulates the expression of beta-lactamases in many enterobacterial strains and many other gram-negative bacilli. In contrast to BlaA, AmpR acts an activator only in the presence of the beta-lactam inducer. In the absence of the inducer, AmpR acts as a repressor. 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: 176173 [Multi-domain] Cd Length: 189 Bit Score: 38.12 E-value: 2.94e-03
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| HTH_MARR | smart00347 | helix_turn_helix multiple antibiotic resistance protein; |
3-82 | 4.17e-03 | |||||
helix_turn_helix multiple antibiotic resistance protein; Pssm-ID: 197670 [Multi-domain] Cd Length: 101 Bit Score: 36.03 E-value: 4.17e-03
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| MarR | COG1846 | DNA-binding transcriptional regulator, MarR family [Transcription]; |
1-90 | 8.41e-03 | |||||
DNA-binding transcriptional regulator, MarR family [Transcription]; Pssm-ID: 441451 [Multi-domain] Cd Length: 142 Bit Score: 36.10 E-value: 8.41e-03
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| PBP2_CrgA_like_8 | cd08477 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
107-240 | 8.70e-03 | |||||
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator CrgA-like, contains the type 2 periplasmic binding fold; This CD represents the substrate binding domain of an uncharacterized LysR-type transcriptional regulator (LTTR) CrgA-like 8. The LTTRs are acting as both auto-repressors and activators of target promoters, controlling operons involved in a wide variety of cellular processes such as amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of nitrogen-fixing bacteria, and synthesis of virulence factors, to name a few. In contrast to the tetrameric form of other LTTRs, CrgA from Neisseria meningitides assembles into an octameric ring, which can bind up to four 63-bp DNA oligonucleotides. Phylogenetic cluster analysis showed that the CrgA-like regulators form a subclass of the LTTRs that function as octamers. The CrgA is an auto-repressor of its own gene and activates the expression of the mdaB gene which coding for an NADPH-quinone reductase and that its action is increased by MBL (alpha-methylene-gamma-butyrolactone), an inducer of NADPH-quinone oxidoreductase. 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: 176166 Cd Length: 197 Bit Score: 36.44 E-value: 8.70e-03
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| COG4190 | COG4190 | Predicted transcriptional regulator, contains HTH domain [Transcription]; |
6-56 | 9.91e-03 | |||||
Predicted transcriptional regulator, contains HTH domain [Transcription]; Pssm-ID: 443344 Cd Length: 121 Bit Score: 35.26 E-value: 9.91e-03
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