imidazoleglycerol-phosphate dehydratase catalyzes the formation of 3-(imidazol-4-yl)-2-oxopropyl phosphate from D-erythro-1-(imidazol-4-yl)glycerol 3-phosphate in the biosynthesis of L-histidine
Imidazoleglycerol-phosphate dehydratase; Imidazoleglycerol-phosphate dehydratase (IGPD; EC 4.2.1.19) catalyzes the dehydration of imidazole glycerol phosphate to imidazole acetol phosphate, the sixth step of histidine biosynthesis in plants and microorganisms where the histidine is synthesized de novo. There is an internal repeat in the protein domain that is related by pseudo-dyad symmetry, perhaps as a result of an ancient gene duplication. The apo-form of IGPD exists as a catalytically inactive trimer which, in the presence of specific divalent metal cations such as manganese (Mn2+), cobalt (Co2+), cadmium (Cd2+), nickel (Ni2+), iron (Fe2+) and zinc (Zn2+), assembles to form a biologically active high molecular weight metalloenzyme; a 24-mer with 4-3-2 symmetry. Each 24-mer has 24 active sites, and contains around 1.5 metal ions per monomer, each monomer contributing residues to three separate active sites. IGPD enzymes are monofunctional in fungi, plants, archaea and some eubacteria while they are encoded as bifunctional enzymes in other eubacteria, such that the enzyme is fused to histidinol-phosphate phosphatase, the penultimate enzyme of the histidine biosynthesis pathway. The histidine biosynthesis pathway is a potential target for development of herbicides, and IGPD is a target for the triazole phosphonate herbicides.
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Pssm-ID: 153419 Cd Length: 190 Bit Score: 291.23 E-value: 3.96e-101
Imidazoleglycerol-phosphate dehydratase; Imidazoleglycerol-phosphate dehydratase (IGPD; EC 4.2.1.19) catalyzes the dehydration of imidazole glycerol phosphate to imidazole acetol phosphate, the sixth step of histidine biosynthesis in plants and microorganisms where the histidine is synthesized de novo. There is an internal repeat in the protein domain that is related by pseudo-dyad symmetry, perhaps as a result of an ancient gene duplication. The apo-form of IGPD exists as a catalytically inactive trimer which, in the presence of specific divalent metal cations such as manganese (Mn2+), cobalt (Co2+), cadmium (Cd2+), nickel (Ni2+), iron (Fe2+) and zinc (Zn2+), assembles to form a biologically active high molecular weight metalloenzyme; a 24-mer with 4-3-2 symmetry. Each 24-mer has 24 active sites, and contains around 1.5 metal ions per monomer, each monomer contributing residues to three separate active sites. IGPD enzymes are monofunctional in fungi, plants, archaea and some eubacteria while they are encoded as bifunctional enzymes in other eubacteria, such that the enzyme is fused to histidinol-phosphate phosphatase, the penultimate enzyme of the histidine biosynthesis pathway. The histidine biosynthesis pathway is a potential target for development of herbicides, and IGPD is a target for the triazole phosphonate herbicides.
Pssm-ID: 153419 Cd Length: 190 Bit Score: 291.23 E-value: 3.96e-101
Imidazoleglycerol phosphate dehydratase HisB [Amino acid transport and metabolism]; ...
26-231
1.13e-93
Imidazoleglycerol phosphate dehydratase HisB [Amino acid transport and metabolism]; Imidazoleglycerol phosphate dehydratase HisB is part of the Pathway/BioSystem: Histidine biosynthesis
Pssm-ID: 439901 Cd Length: 183 Bit Score: 272.29 E-value: 1.13e-93
Imidazoleglycerol-phosphate dehydratase; Imidazoleglycerol-phosphate dehydratase (IGPD; EC 4.2.1.19) catalyzes the dehydration of imidazole glycerol phosphate to imidazole acetol phosphate, the sixth step of histidine biosynthesis in plants and microorganisms where the histidine is synthesized de novo. There is an internal repeat in the protein domain that is related by pseudo-dyad symmetry, perhaps as a result of an ancient gene duplication. The apo-form of IGPD exists as a catalytically inactive trimer which, in the presence of specific divalent metal cations such as manganese (Mn2+), cobalt (Co2+), cadmium (Cd2+), nickel (Ni2+), iron (Fe2+) and zinc (Zn2+), assembles to form a biologically active high molecular weight metalloenzyme; a 24-mer with 4-3-2 symmetry. Each 24-mer has 24 active sites, and contains around 1.5 metal ions per monomer, each monomer contributing residues to three separate active sites. IGPD enzymes are monofunctional in fungi, plants, archaea and some eubacteria while they are encoded as bifunctional enzymes in other eubacteria, such that the enzyme is fused to histidinol-phosphate phosphatase, the penultimate enzyme of the histidine biosynthesis pathway. The histidine biosynthesis pathway is a potential target for development of herbicides, and IGPD is a target for the triazole phosphonate herbicides.
Pssm-ID: 153419 Cd Length: 190 Bit Score: 291.23 E-value: 3.96e-101
Imidazoleglycerol phosphate dehydratase HisB [Amino acid transport and metabolism]; ...
26-231
1.13e-93
Imidazoleglycerol phosphate dehydratase HisB [Amino acid transport and metabolism]; Imidazoleglycerol phosphate dehydratase HisB is part of the Pathway/BioSystem: Histidine biosynthesis
Pssm-ID: 439901 Cd Length: 183 Bit Score: 272.29 E-value: 1.13e-93
Database: CDSEARCH/cdd Low complexity filter: no Composition Based Adjustment: yes E-value threshold: 0.01
References:
Wang J et al. (2023), "The conserved domain database in 2023", Nucleic Acids Res.51(D)384-8.
Lu S et al. (2020), "The conserved domain database in 2020", Nucleic Acids Res.48(D)265-8.
Marchler-Bauer A et al. (2017), "CDD/SPARCLE: functional classification of proteins via subfamily domain architectures.", Nucleic Acids Res.45(D)200-3.
of the residues that compose this conserved feature have been mapped to the query sequence.
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