MULTISPECIES: LysR family transcriptional regulator [Enterobacter cloacae complex]
Protein Classification
LysR family transcriptional regulator( domain architecture ID 10444056)
LysR family transcriptional regulator similar to Pseudomonas aeruginosa HTH-type transcriptional regulator PtxR, which regulates the toxA (exotoxin) and regA genes; substrate binding domain-containing protein is a type 2 periplasmic binding protein (PBP2), similar to the regulatory domain of Vibrio vulnificus virulence gene regulator AphB that has been implicated in acid resistance and pathogenesis
List of domain hits
| Name | Accession | Description | Interval | E-value | ||||
| PBP2_CrgA_like | cd08422 | The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA and its ... |
96-295 | 4.75e-72 | ||||
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: 220.39 E-value: 4.75e-72
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| HTH_1 | pfam00126 | Bacterial regulatory helix-turn-helix protein, lysR family; |
8-67 | 4.41e-20 | ||||
Bacterial regulatory helix-turn-helix protein, lysR family; : Pssm-ID: 459683 [Multi-domain] Cd Length: 60 Bit Score: 81.66 E-value: 4.41e-20
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| Name | Accession | Description | Interval | E-value | |||||
| PBP2_CrgA_like | cd08422 | The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA and its ... |
96-295 | 4.75e-72 | |||||
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: 220.39 E-value: 4.75e-72
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| LysR | COG0583 | DNA-binding transcriptional regulator, LysR family [Transcription]; |
8-297 | 5.54e-63 | |||||
DNA-binding transcriptional regulator, LysR family [Transcription]; Pssm-ID: 440348 [Multi-domain] Cd Length: 256 Bit Score: 199.32 E-value: 5.54e-63
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| PRK14997 | PRK14997 | LysR family transcriptional regulator; Provisional |
8-298 | 3.20e-44 | |||||
LysR family transcriptional regulator; Provisional Pssm-ID: 184959 [Multi-domain] Cd Length: 301 Bit Score: 152.45 E-value: 3.20e-44
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| LysR_substrate | pfam03466 | LysR substrate binding domain; The structure of this domain is known and is similar to the ... |
95-297 | 2.00e-32 | |||||
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: 118.93 E-value: 2.00e-32
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| HTH_1 | pfam00126 | Bacterial regulatory helix-turn-helix protein, lysR family; |
8-67 | 4.41e-20 | |||||
Bacterial regulatory helix-turn-helix protein, lysR family; Pssm-ID: 459683 [Multi-domain] Cd Length: 60 Bit Score: 81.66 E-value: 4.41e-20
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| argP | TIGR03298 | transcriptional regulator, ArgP family; ArgP used to be known as IciA. ArgP is a positive ... |
5-265 | 1.97e-11 | |||||
transcriptional regulator, ArgP family; ArgP used to be known as IciA. ArgP is a positive regulator of argK. It is a negative autoregulator in presence of arginine. It competes with DnaA for oriC iteron (13-mer) binding. It activates dnaA and nrd transcription. It has been demonstrated to be part of the pho regulon (). ArgP mutants convey canavanine (an L-arginine structural homolog) sensitivity. [Cellular processes, Toxin production and resistance, DNA metabolism, DNA replication, recombination, and repair, Regulatory functions, DNA interactions] Pssm-ID: 274509 [Multi-domain] Cd Length: 292 Bit Score: 63.40 E-value: 1.97e-11
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| PRK15243 | PRK15243 | virulence genes transcriptional activator SpvR; |
11-86 | 1.37e-04 | |||||
virulence genes transcriptional activator SpvR; Pssm-ID: 185155 [Multi-domain] Cd Length: 297 Bit Score: 42.73 E-value: 1.37e-04
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| Name | Accession | Description | Interval | E-value | |||||
| PBP2_CrgA_like | cd08422 | The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA and its ... |
96-295 | 4.75e-72 | |||||
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: 220.39 E-value: 4.75e-72
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| LysR | COG0583 | DNA-binding transcriptional regulator, LysR family [Transcription]; |
8-297 | 5.54e-63 | |||||
DNA-binding transcriptional regulator, LysR family [Transcription]; Pssm-ID: 440348 [Multi-domain] Cd Length: 256 Bit Score: 199.32 E-value: 5.54e-63
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| PBP2_CrgA_like_8 | cd08477 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-295 | 1.31e-56 | |||||
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: 180.89 E-value: 1.31e-56
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| PBP2_CrgA_like_3 | cd08472 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-292 | 3.92e-56 | |||||
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 3. 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: 176161 Cd Length: 202 Bit Score: 180.02 E-value: 3.92e-56
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| PBP2_CrgA_like_1 | cd08470 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-298 | 3.84e-55 | |||||
The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional regulator CrgA-like, contains the type 2 periplasmic binding domain; This CD represents the substrate binding domain of an uncharacterized LysR-type transcriptional regulator (LTTR) CrgA-like 1. 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: 176159 Cd Length: 197 Bit Score: 177.12 E-value: 3.84e-55
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| PBP2_CrgA_like_6 | cd08475 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-295 | 6.50e-54 | |||||
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 6. 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: 176164 [Multi-domain] Cd Length: 199 Bit Score: 174.28 E-value: 6.50e-54
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| PBP2_CrgA_like_7 | cd08476 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-295 | 1.19e-50 | |||||
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 7. 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: 176165 Cd Length: 197 Bit Score: 165.88 E-value: 1.19e-50
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| PBP2_CrgA_like_5 | cd08474 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
95-295 | 7.35e-50 | |||||
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 5. 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: 176163 [Multi-domain] Cd Length: 202 Bit Score: 163.79 E-value: 7.35e-50
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| PRK14997 | PRK14997 | LysR family transcriptional regulator; Provisional |
8-298 | 3.20e-44 | |||||
LysR family transcriptional regulator; Provisional Pssm-ID: 184959 [Multi-domain] Cd Length: 301 Bit Score: 152.45 E-value: 3.20e-44
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| PBP2_CrgA_like_4 | cd08473 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
95-295 | 2.43e-41 | |||||
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 4. 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: 176162 [Multi-domain] Cd Length: 202 Bit Score: 141.92 E-value: 2.43e-41
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| PBP2_CrgA_like_2 | cd08471 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-297 | 4.44e-41 | |||||
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 2. 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: 176160 Cd Length: 201 Bit Score: 141.12 E-value: 4.44e-41
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| PBP2_CrgA_like_10 | cd08480 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-295 | 1.55e-39 | |||||
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 10. 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: 176169 Cd Length: 198 Bit Score: 137.08 E-value: 1.55e-39
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| PBP2_CrgA_like_9 | cd08479 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
96-295 | 7.44e-38 | |||||
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 9. 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: 176168 [Multi-domain] Cd Length: 198 Bit Score: 132.72 E-value: 7.44e-38
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| PRK11139 | PRK11139 | DNA-binding transcriptional activator GcvA; Provisional |
1-277 | 6.33e-37 | |||||
DNA-binding transcriptional activator GcvA; Provisional Pssm-ID: 182990 [Multi-domain] Cd Length: 297 Bit Score: 133.04 E-value: 6.33e-37
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| PRK10632 | PRK10632 | HTH-type transcriptional activator AaeR; |
13-273 | 2.75e-33 | |||||
HTH-type transcriptional activator AaeR; Pssm-ID: 182601 [Multi-domain] Cd Length: 309 Bit Score: 124.10 E-value: 2.75e-33
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| LysR_substrate | pfam03466 | LysR substrate binding domain; The structure of this domain is known and is similar to the ... |
95-297 | 2.00e-32 | |||||
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: 118.93 E-value: 2.00e-32
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| PRK09801 | PRK09801 | LysR family transcriptional regulator; |
10-297 | 1.50e-31 | |||||
LysR family transcriptional regulator; Pssm-ID: 182085 [Multi-domain] Cd Length: 310 Bit Score: 119.37 E-value: 1.50e-31
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| PRK10086 | PRK10086 | DNA-binding transcriptional regulator DsdC; |
8-268 | 1.68e-31 | |||||
DNA-binding transcriptional regulator DsdC; Pssm-ID: 182231 [Multi-domain] Cd Length: 311 Bit Score: 119.34 E-value: 1.68e-31
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| PBP2_CrgA | cd08478 | The C-terminal substrate binding domain of LysR-type transcriptional regulator CrgA, contains ... |
96-295 | 2.41e-27 | |||||
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: 105.50 E-value: 2.41e-27
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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, ... |
97-290 | 8.40e-25 | |||||
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: 98.42 E-value: 8.40e-25
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| PRK10837 | PRK10837 | putative DNA-binding transcriptional regulator; Provisional |
8-295 | 1.34e-23 | |||||
putative DNA-binding transcriptional regulator; Provisional Pssm-ID: 182768 [Multi-domain] Cd Length: 290 Bit Score: 97.45 E-value: 1.34e-23
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| PBP2_CysL_like | cd08420 | C-terminal substrate binding domain of LysR-type transcriptional regulator CysL, which ... |
97-295 | 1.23e-21 | |||||
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: 90.24 E-value: 1.23e-21
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| PBP2_LTTR_substrate | cd05466 | The substrate binding domain of LysR-type transcriptional regulators (LTTRs), a member of the ... |
97-295 | 2.80e-21 | |||||
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: 89.20 E-value: 2.80e-21
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| PRK11716 | PRK11716 | HTH-type transcriptional activator IlvY; |
33-210 | 1.38e-20 | |||||
HTH-type transcriptional activator IlvY; Pssm-ID: 236961 [Multi-domain] Cd Length: 269 Bit Score: 88.72 E-value: 1.38e-20
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| HTH_1 | pfam00126 | Bacterial regulatory helix-turn-helix protein, lysR family; |
8-67 | 4.41e-20 | |||||
Bacterial regulatory helix-turn-helix protein, lysR family; Pssm-ID: 459683 [Multi-domain] Cd Length: 60 Bit Score: 81.66 E-value: 4.41e-20
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| PRK11242 | PRK11242 | DNA-binding transcriptional regulator CynR; Provisional |
14-190 | 1.01e-18 | |||||
DNA-binding transcriptional regulator CynR; Provisional Pssm-ID: 183051 [Multi-domain] Cd Length: 296 Bit Score: 84.24 E-value: 1.01e-18
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| rbcR | CHL00180 | LysR transcriptional regulator; Provisional |
13-154 | 2.69e-16 | |||||
LysR transcriptional regulator; Provisional Pssm-ID: 177082 [Multi-domain] Cd Length: 305 Bit Score: 77.37 E-value: 2.69e-16
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| PRK11233 | PRK11233 | nitrogen assimilation transcriptional regulator; Provisional |
14-171 | 4.94e-15 | |||||
nitrogen assimilation transcriptional regulator; Provisional Pssm-ID: 183045 [Multi-domain] Cd Length: 305 Bit Score: 73.95 E-value: 4.94e-15
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| PBP2_LTTR_beta_lactamase | cd08484 | The C-terminal substrate-domain of LysR-type transcriptional regulators for beta-lactamase ... |
98-276 | 2.04e-13 | |||||
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: 67.40 E-value: 2.04e-13
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| PRK11074 | PRK11074 | putative DNA-binding transcriptional regulator; Provisional |
12-147 | 3.39e-13 | |||||
putative DNA-binding transcriptional regulator; Provisional Pssm-ID: 182948 [Multi-domain] Cd Length: 300 Bit Score: 68.43 E-value: 3.39e-13
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| PRK09791 | PRK09791 | LysR family transcriptional regulator; |
14-127 | 5.05e-13 | |||||
LysR family transcriptional regulator; Pssm-ID: 182077 [Multi-domain] Cd Length: 302 Bit Score: 68.25 E-value: 5.05e-13
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| PRK10094 | PRK10094 | HTH-type transcriptional activator AllS; |
14-147 | 5.53e-13 | |||||
HTH-type transcriptional activator AllS; Pssm-ID: 182237 [Multi-domain] Cd Length: 308 Bit Score: 67.91 E-value: 5.53e-13
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| PBP2_HvrB | cd08483 | The C-terminal substrate-binding domain of LysR-type transcriptional regulator HvrB, an ... |
100-262 | 2.70e-12 | |||||
The C-terminal substrate-binding domain of LysR-type transcriptional regulator HvrB, an activator of S-adenosyl-L-homocysteine hydrolase expression, contains the type 2 periplasmic binding fold; The transcriptional regulator HvrB of the LysR family is required for the light-dependent activation of both ahcY, which encoding the enzyme S-adenosyl-L-homocysteine hydrolase (AdoHcyase) that responsible for the reversible hydrolysis of AdoHcy to adenosine and homocysteine, and orf5, a gene of unknown. The topology of this C-terminal domain of HvrB 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: 176172 [Multi-domain] Cd Length: 190 Bit Score: 64.29 E-value: 2.70e-12
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| PBP2_GcdR_like | cd08481 | The C-terminal substrate binding domain of LysR-type transcriptional regulators GcdR-like, ... |
99-290 | 2.79e-12 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulators GcdR-like, contains the type 2 periplasmic binding fold; GcdR is involved in the glutaconate/glutarate-specific activation of the Pg promoter driving expression of a glutaryl-CoA dehydrogenase-encoding gene (gcdH). The GcdH protein is essential for the anaerobic catabolism of many aromatic compounds and some alicyclic and dicarboxylic acids. The structural topology of this substrate-binding domain is most similar 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: 176170 [Multi-domain] Cd Length: 194 Bit Score: 64.24 E-value: 2.79e-12
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| PRK09906 | PRK09906 | DNA-binding transcriptional regulator HcaR; Provisional |
14-129 | 6.09e-12 | |||||
DNA-binding transcriptional regulator HcaR; Provisional Pssm-ID: 182137 [Multi-domain] Cd Length: 296 Bit Score: 64.79 E-value: 6.09e-12
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| PRK03635 | PRK03635 | ArgP/LysG family DNA-binding transcriptional regulator; |
16-268 | 9.63e-12 | |||||
ArgP/LysG family DNA-binding transcriptional regulator; Pssm-ID: 235144 [Multi-domain] Cd Length: 294 Bit Score: 64.02 E-value: 9.63e-12
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| PRK09986 | PRK09986 | LysR family transcriptional regulator; |
14-170 | 1.47e-11 | |||||
LysR family transcriptional regulator; Pssm-ID: 182183 [Multi-domain] Cd Length: 294 Bit Score: 63.59 E-value: 1.47e-11
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| PBP2_AmpR | cd08488 | The C-terminal substrate domain of LysR-type transcriptional regulator AmpR that involved in ... |
111-265 | 1.93e-11 | |||||
The C-terminal substrate domain of LysR-type transcriptional regulator AmpR that involved in control of the expression of beta-lactamase gene ampC, contains the type 2 periplasmic binding fold; AmpR acts as a transcriptional activator by binding to a DNA region immediately upstream of the ampC promoter. In the absence of a beta-lactam inducer, AmpR represses the synthesis of beta-lactamase, whereas expression is induced in the presence of a beta-lactam inducer. The AmpD, AmpG, and AmpR proteins are involved in the induction of AmpC-type beta-lactamase (class C) which produced by enterobacterial strains and many other gram-negative bacilli. The activation of ampC by AmpR requires ampG for induction or high-level expression of AmpC. It is probable that the AmpD and AmpG work together to modulate the ability of AmpR to activate ampC expression. 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: 176177 [Multi-domain] Cd Length: 191 Bit Score: 61.78 E-value: 1.93e-11
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| argP | TIGR03298 | transcriptional regulator, ArgP family; ArgP used to be known as IciA. ArgP is a positive ... |
5-265 | 1.97e-11 | |||||
transcriptional regulator, ArgP family; ArgP used to be known as IciA. ArgP is a positive regulator of argK. It is a negative autoregulator in presence of arginine. It competes with DnaA for oriC iteron (13-mer) binding. It activates dnaA and nrd transcription. It has been demonstrated to be part of the pho regulon (). ArgP mutants convey canavanine (an L-arginine structural homolog) sensitivity. [Cellular processes, Toxin production and resistance, DNA metabolism, DNA replication, recombination, and repair, Regulatory functions, DNA interactions] Pssm-ID: 274509 [Multi-domain] Cd Length: 292 Bit Score: 63.40 E-value: 1.97e-11
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| PRK13348 | PRK13348 | HTH-type transcriptional regulator ArgP; |
5-142 | 4.02e-11 | |||||
HTH-type transcriptional regulator ArgP; Pssm-ID: 237357 [Multi-domain] Cd Length: 294 Bit Score: 62.30 E-value: 4.02e-11
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| PRK11151 | PRK11151 | DNA-binding transcriptional regulator OxyR; Provisional |
10-147 | 4.08e-11 | |||||
DNA-binding transcriptional regulator OxyR; Provisional Pssm-ID: 182999 [Multi-domain] Cd Length: 305 Bit Score: 62.35 E-value: 4.08e-11
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| PBP2_CbbR_RubisCO_like | cd08419 | The C-terminal substrate binding of LysR-type transcriptional regulator (CbbR) of RubisCO ... |
97-198 | 6.77e-11 | |||||
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: 60.21 E-value: 6.77e-11
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| PBP2_LTTR_like_5 | cd08426 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
111-295 | 7.03e-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: 176117 [Multi-domain] Cd Length: 199 Bit Score: 60.40 E-value: 7.03e-11
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| PBP2_BlaA | cd08487 | The C-terminal substrate-binding domain of LysR-type trnascriptional regulator BlaA which ... |
111-262 | 2.19e-09 | |||||
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: 56.01 E-value: 2.19e-09
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| PRK12683 | PRK12683 | transcriptional regulator CysB-like protein; Reviewed |
24-129 | 4.12e-09 | |||||
transcriptional regulator CysB-like protein; Reviewed Pssm-ID: 237172 [Multi-domain] Cd Length: 309 Bit Score: 56.59 E-value: 4.12e-09
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| PRK15092 | PRK15092 | DNA-binding transcriptional repressor LrhA; Provisional |
14-147 | 5.08e-09 | |||||
DNA-binding transcriptional repressor LrhA; Provisional Pssm-ID: 237907 [Multi-domain] Cd Length: 310 Bit Score: 56.19 E-value: 5.08e-09
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| PBP2_TdcA | cd08418 | The C-terminal substrate binding domain of LysR-type transcriptional regulator TdcA, which is ... |
97-295 | 9.08e-09 | |||||
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: 54.28 E-value: 9.08e-09
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| PBP2_GbpR | cd08435 | The C-terminal substrate binding domain of galactose-binding protein regulator contains the ... |
111-295 | 1.05e-08 | |||||
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: 54.20 E-value: 1.05e-08
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| PRK12680 | PRK12680 | LysR family transcriptional regulator; |
8-196 | 1.13e-08 | |||||
LysR family transcriptional regulator; Pssm-ID: 183677 [Multi-domain] Cd Length: 327 Bit Score: 55.40 E-value: 1.13e-08
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| PRK10341 | PRK10341 | transcriptional regulator TdcA; |
13-201 | 3.45e-08 | |||||
transcriptional regulator TdcA; Pssm-ID: 182391 [Multi-domain] Cd Length: 312 Bit Score: 53.71 E-value: 3.45e-08
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| PRK12682 | PRK12682 | transcriptional regulator CysB-like protein; Reviewed |
24-130 | 3.71e-08 | |||||
transcriptional regulator CysB-like protein; Reviewed Pssm-ID: 183679 [Multi-domain] Cd Length: 309 Bit Score: 53.84 E-value: 3.71e-08
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| PRK12684 | PRK12684 | CysB family HTH-type transcriptional regulator; |
24-147 | 3.75e-08 | |||||
CysB family HTH-type transcriptional regulator; Pssm-ID: 237173 [Multi-domain] Cd Length: 313 Bit Score: 53.83 E-value: 3.75e-08
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| PBP2_LTTR_like_4 | cd08440 | TThe C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
97-295 | 4.03e-08 | |||||
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: 52.53 E-value: 4.03e-08
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| cbl | PRK12679 | HTH-type transcriptional regulator Cbl; |
24-130 | 5.94e-07 | |||||
HTH-type transcriptional regulator Cbl; Pssm-ID: 183676 [Multi-domain] Cd Length: 316 Bit Score: 50.19 E-value: 5.94e-07
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| PBP2_IlvY | cd08430 | The C-terminal substrate binding of LysR-type transcriptional regulator IlvY, which activates ... |
101-213 | 1.14e-06 | |||||
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: 48.34 E-value: 1.14e-06
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| PRK11013 | PRK11013 | DNA-binding transcriptional regulator LysR; Provisional |
11-132 | 2.16e-06 | |||||
DNA-binding transcriptional regulator LysR; Provisional Pssm-ID: 236819 [Multi-domain] Cd Length: 309 Bit Score: 48.45 E-value: 2.16e-06
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| PBP2_Nac | cd08433 | The C-teminal substrate binding domain of LysR-like nitrogen assimilation control (NAC) ... |
97-295 | 2.44e-06 | |||||
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: 47.20 E-value: 2.44e-06
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| PRK15421 | PRK15421 | HTH-type transcriptional regulator MetR; |
21-261 | 2.72e-06 | |||||
HTH-type transcriptional regulator MetR; Pssm-ID: 185319 [Multi-domain] Cd Length: 317 Bit Score: 48.09 E-value: 2.72e-06
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| PRK10082 | PRK10082 | hypochlorite stress DNA-binding transcriptional regulator HypT; |
14-261 | 1.16e-05 | |||||
hypochlorite stress DNA-binding transcriptional regulator HypT; Pssm-ID: 182228 [Multi-domain] Cd Length: 303 Bit Score: 46.20 E-value: 1.16e-05
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| PBP2_LTTR_aromatics_like | cd08414 | The C-terminal substrate binding domain of LysR-type transcriptional regulators involved in ... |
97-295 | 2.63e-05 | |||||
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: 44.04 E-value: 2.63e-05
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| PBP2_LysR_opines_like | cd08415 | The C-terminal substrate-domain of LysR-type transcriptional regulators involved in the ... |
97-295 | 3.61e-05 | |||||
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: 43.70 E-value: 3.61e-05
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| PBP2_LTTR_like_3 | cd08436 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
97-295 | 6.96e-05 | |||||
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: 42.97 E-value: 6.96e-05
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| PBP2_PAO1_like | cd08412 | The C-terminal substrate-binding domain of putative LysR-type transcriptional regulator ... |
97-292 | 1.34e-04 | |||||
The C-terminal substrate-binding domain of putative LysR-type transcriptional regulator PAO1-like, a member of the type 2 periplasmic binding fold protein superfamily; This family includes the C-terminal substrate domain of a putative LysR-type transcriptional regulator from the plant pathogen Pseudomonas aeruginosa PAO1and its closely related homologs. The LysR-type transcriptional regulators (LTTRs) are composed of two functional domains joined by a linker helix involved in oligomerization: an N-terminal HTH (helix-turn-helix) domain, which is responsible for the DNA-binding specificity, and a C-terminal substrate-binding domain, which is structurally homologous to the type 2 periplasmic binding proteins. As also observed in the periplasmic binding proteins, the C-terminal domain of the bacterial transcriptional repressor undergoes a conformational change upon substrate binding which in turn changes the DNA binding affinity of the repressor. The genes controlled by the LTTRs have diverse functional roles including amino acid biosynthesis, CO2 fixation, antibiotic resistance, degradation of aromatic compounds, nodule formation of N2 fixing bacteria, and synthesis of virulence factors, to a name a few. The structural topology of this substrate-binding domain is most similar to that of the type 2 periplasmic binding proteins (PBP2), which are responsible for the uptake of a variety of substrates such as phosphate, sulfate, polysaccharides, lysine/arginine/ornithine, and histidine. The PBP2 bind their ligand in the cleft between these domains in a manner resembling a Venus flytrap. After binding their specific ligand with high affinity, they can interact with a cognate membrane transport complex comprised of two integral membrane domains and two cytoplasmically located ATPase domains. This interaction triggers the ligand translocation across the cytoplasmic membrane energized by ATP hydrolysis. Besides transport proteins, the PBP2 superfamily includes the substrate-binding domains from ionotropic glutamate receptors, LysR-like transcriptional regulators, and unorthodox sensor proteins involved in signal transduction. Pssm-ID: 176104 [Multi-domain] Cd Length: 198 Bit Score: 42.15 E-value: 1.34e-04
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| PRK15243 | PRK15243 | virulence genes transcriptional activator SpvR; |
11-86 | 1.37e-04 | |||||
virulence genes transcriptional activator SpvR; Pssm-ID: 185155 [Multi-domain] Cd Length: 297 Bit Score: 42.73 E-value: 1.37e-04
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| PBP2_TrpI | cd08482 | The C-terminal substrate binding domain of LysR-type transcriptional regulator TrpI, which is ... |
111-291 | 5.68e-04 | |||||
The C-terminal substrate binding domain of LysR-type transcriptional regulator TrpI, which is involved in control of tryptophan synthesis, contains type 2 periplasmic binding fold; TrpI and indoleglycerol phosphate (InGP), are required to activate transcription of the trpBA, the genes for tryptophan synthase. The trpBA is induced by the InGp substrate, rather than by tryptophan, but the exact mechanism of the activation event is not known. This substrate-binding domain of TrpI 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: 176171 [Multi-domain] Cd Length: 195 Bit Score: 40.08 E-value: 5.68e-04
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| PBP2_LTTR_like_6 | cd08423 | The C-terminal substrate binding domain of an uncharacterized LysR-type transcriptional ... |
111-297 | 1.06e-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: 176115 [Multi-domain] Cd Length: 200 Bit Score: 39.50 E-value: 1.06e-03
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| PBP2_LrhA_like | cd08439 | The C-terminal substrate domain of LysR-like regulator LrhA (LysR homologue A) and that of ... |
97-182 | 4.88e-03 | |||||
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: 37.31 E-value: 4.88e-03
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| PBP2_GltC_like | cd08434 | The substrate binding domain of LysR-type transcriptional regulator GltC, which activates gltA ... |
98-243 | 7.61e-03 | |||||
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: 36.75 E-value: 7.61e-03
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| nhaR | PRK11062 | transcriptional activator NhaR; Provisional |
14-79 | 8.30e-03 | |||||
transcriptional activator NhaR; Provisional Pssm-ID: 182938 [Multi-domain] Cd Length: 296 Bit Score: 37.30 E-value: 8.30e-03
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