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2-methyl-3-hydroxypyridine-5-carboxylic acid + NADH + O2 + H+
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylene)succinate + NAD(P)+
-
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+ + H2O
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD(P)+
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD+
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2 + H+
2-(acetamidomethylene)succinate + NAD+
3-hydroxy-2-methylpyridine-5-carboxylate + NADPH + H+ + O2
2-(acetamidomethylene)succinate + NADP+
-
Substrates: -
Products: -
?
5-hydroxynicotinate + NAD(P)H + H+ + O2
? + NAD(P)+
-
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + H+ + O2
alpha-(N-formylaminomethylene)succinic acid + NAD+ + H2O
5-hydroxynicotinic acid + NADH + O2
?
5-hydroxynicotinic acid + NADH + O2 + H+
2-(formylamidomethylene)succinate + NAD+
5-pyridoxic acid + NADH + H+ + O2
alpha-(N-acetylaminomethylene)-beta-hydroxymethyl succinic acid + NAD+ + H2O
5-pyridoxic acid + NADH + O2
?
-
Substrates: -
Products: -
?
5-pyridoxic acid + NADH + O2 + H+
2-(acetamidomethylene)-beta-hydroxymethyl succinate + NAD+
Substrates: 5% of the activity with 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
N-methyl-5-hydroxynicotinic acid + NADH + O2
?
-
Substrates: -
Products: -
?
additional information
?
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3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+ + H2O
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+ + H2O
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+ + H2O
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD(P)+
-
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD(P)+
-
Substrates: the nitrogen atom of the 3-hydroxy-2-methylpyridine-5-carboxylate is invariably protonated during the catalytic reaction
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD+
-
Substrates: inducible enzyme opens the pyridine ring during the metabolic degradation of vitamin B6
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD+
-
Substrates: enzyme is involved in degradation of vitamin B6
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2 + H+
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2 + H+
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + H+ + O2
alpha-(N-formylaminomethylene)succinic acid + NAD+ + H2O
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + H+ + O2
alpha-(N-formylaminomethylene)succinic acid + NAD+ + H2O
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + H+ + O2
alpha-(N-formylaminomethylene)succinic acid + NAD+ + H2O
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + O2
?
-
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + O2
?
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + O2 + H+
2-(formylamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + O2 + H+
2-(formylamidomethylene)succinate + NAD+
Substrates: about 100% of the activity with 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
5-hydroxynicotinic acid + NADH + O2 + H+
2-(formylamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
5-pyridoxic acid + NADH + H+ + O2
alpha-(N-acetylaminomethylene)-beta-hydroxymethyl succinic acid + NAD+ + H2O
Substrates: 5% activity compared to 3-hydroxy-2-methylpyridine-5-carboxylate
Products: -
?
5-pyridoxic acid + NADH + H+ + O2
alpha-(N-acetylaminomethylene)-beta-hydroxymethyl succinic acid + NAD+ + H2O
Substrates: 5% activity compared to 3-hydroxy-2-methylpyridine-5-carboxylate
Products: -
?
5-pyridoxic acid + NADH + H+ + O2
alpha-(N-acetylaminomethylene)-beta-hydroxymethyl succinic acid + NAD+ + H2O
Substrates: 5% activity compared to 3-hydroxy-2-methylpyridine-5-carboxylate
Products: -
?
additional information
?
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Substrates: comparisons of substrate binding structure analysis mechanism
Products: -
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additional information
?
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Substrates: comparisons of substrate binding structure analysis mechanism
Products: -
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additional information
?
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Substrates: comparisons of substrate binding structure analysis mechanism
Products: -
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additional information
?
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Substrates: comparisons of substrate binding structure analysis mechanism
Products: -
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additional information
?
-
Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
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Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
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Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
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Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
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2-methyl-3-hydroxypyridine-5-carboxylic acid + NADH + O2 + H+
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD+
3-hydroxy-2-methylpyridine-5-carboxylate + NADPH + H+ + O2
2-(acetamidomethylene)succinate + NADP+
-
Substrates: -
Products: -
?
5-hydroxynicotinic acid + NADH + O2 + H+
2-(formylamidomethylene)succinate + NAD+
Substrates: about 100% of the activity with 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
5-pyridoxic acid + NADH + O2 + H+
2-(acetamidomethylene)-beta-hydroxymethyl succinate + NAD+
Substrates: 5% of the activity with 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
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3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NAD(P)H + H+ + O2
2-(acetamidomethylidene)succinate + NAD(P)+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + H+ + O2
2-(acetamidomethylene)succinate + NAD+
Substrates: -
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD+
-
Substrates: inducible enzyme opens the pyridine ring during the metabolic degradation of vitamin B6
Products: -
?
3-hydroxy-2-methylpyridine-5-carboxylate + NADH + O2
2-(acetamidomethylene)succinate + NAD+
-
Substrates: enzyme is involved in degradation of vitamin B6
Products: -
?
additional information
?
-
Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
-
-
Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
-
Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
additional information
?
-
Substrates: also catalyzes the NADH oxidation reaction uncoupled with ring opening in the absence of 2-methyl-3-hydroxypyridine-5-carboxylic acid
Products: -
?
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physiological function
conversion of 2-methyl-3-hydroxypyridine-5-carboxylic acid to alpha-(N-acetylaminomethylene)succinic acid is the essential ring-opening step in the bacterial degradation of vitamin B6. The rearomatisation of the hydroxylated intermediate occurs spontaneously in aqueous solution. This implies that the ring-opening process occurs inside the enzyme's active site. Proposal of two pathways with reasonable energy barriers
physiological function
MHPCO is essential for the assimilation of pyridoxine, but not for its growth in a nutrient-rich medium. MHPCO is dispensable for at least nodule formation on roots of seedlings in symbiosis
physiological function
2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO) is a flavoenzyme that catalyzes oxidative ring opening of 2-methyl-3-hydroxypyridine-5-carboxylic acid
physiological function
-
2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO) is a flavoenzyme that catalyzes oxidative ring opening of 2-methyl-3-hydroxypyridine-5-carboxylic acid
-
physiological function
-
2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO) is a flavoenzyme that catalyzes oxidative ring opening of 2-methyl-3-hydroxypyridine-5-carboxylic acid
-
physiological function
-
conversion of 2-methyl-3-hydroxypyridine-5-carboxylic acid to alpha-(N-acetylaminomethylene)succinic acid is the essential ring-opening step in the bacterial degradation of vitamin B6. The rearomatisation of the hydroxylated intermediate occurs spontaneously in aqueous solution. This implies that the ring-opening process occurs inside the enzyme's active site. Proposal of two pathways with reasonable energy barriers
-
physiological function
-
MHPCO is essential for the assimilation of pyridoxine, but not for its growth in a nutrient-rich medium. MHPCO is dispensable for at least nodule formation on roots of seedlings in symbiosis
-
additional information
sequence comparisons, three-dimensional enzyme structure analysis, and structure comparisons with 2-hydroxybiphenyl 3-monooxygenase (HbpA) from Pseudomonas nitroreducens and 2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO, PDB ID 5hxi) from Mesorhizobium japonicum, overview. Despite having only 14% similarity in their primary sequences, pairwise structure alignments of PobA from Pseudomonas putida with HbpA from Pseudomonas nitroreducens and MHPCO from Mesorhizobium japonicum reveal local similarities between these structures. Key residues in the FAD-binding and substrate-binding sites of PobA are highly conserved spatially across the proteins from all three species. The PobA from Pseudomonas putida is structurally very similar to PobA from Pseudomonas fluorescens and from Pseudomonas aeruginosa. Key secondary-structure elements important for catalysis, such as the betaalphabeta fold, beta-sheet wall and alpha12 helix, are conserved across this expanded class of oxygenases
additional information
-
sequence comparisons, three-dimensional enzyme structure analysis, and structure comparisons with 2-hydroxybiphenyl 3-monooxygenase (HbpA) from Pseudomonas nitroreducens and 2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO, PDB ID 5hxi) from Mesorhizobium japonicum, overview. Despite having only 14% similarity in their primary sequences, pairwise structure alignments of PobA from Pseudomonas putida with HbpA from Pseudomonas nitroreducens and MHPCO from Mesorhizobium japonicum reveal local similarities between these structures. Key residues in the FAD-binding and substrate-binding sites of PobA are highly conserved spatially across the proteins from all three species. The PobA from Pseudomonas putida is structurally very similar to PobA from Pseudomonas fluorescens and from Pseudomonas aeruginosa. Key secondary-structure elements important for catalysis, such as the betaalphabeta fold, beta-sheet wall and alpha12 helix, are conserved across this expanded class of oxygenases
additional information
-
sequence comparisons, three-dimensional enzyme structure analysis, and structure comparisons with 2-hydroxybiphenyl 3-monooxygenase (HbpA) from Pseudomonas nitroreducens and 2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO, PDB ID 5hxi) from Mesorhizobium japonicum, overview. Despite having only 14% similarity in their primary sequences, pairwise structure alignments of PobA from Pseudomonas putida with HbpA from Pseudomonas nitroreducens and MHPCO from Mesorhizobium japonicum reveal local similarities between these structures. Key residues in the FAD-binding and substrate-binding sites of PobA are highly conserved spatially across the proteins from all three species. The PobA from Pseudomonas putida is structurally very similar to PobA from Pseudomonas fluorescens and from Pseudomonas aeruginosa. Key secondary-structure elements important for catalysis, such as the betaalphabeta fold, beta-sheet wall and alpha12 helix, are conserved across this expanded class of oxygenases
-
additional information
-
sequence comparisons, three-dimensional enzyme structure analysis, and structure comparisons with 2-hydroxybiphenyl 3-monooxygenase (HbpA) from Pseudomonas nitroreducens and 2-methyl-3-hydroxypyridine-5-carboxylic acid oxygenase (MHPCO, PDB ID 5hxi) from Mesorhizobium japonicum, overview. Despite having only 14% similarity in their primary sequences, pairwise structure alignments of PobA from Pseudomonas putida with HbpA from Pseudomonas nitroreducens and MHPCO from Mesorhizobium japonicum reveal local similarities between these structures. Key residues in the FAD-binding and substrate-binding sites of PobA are highly conserved spatially across the proteins from all three species. The PobA from Pseudomonas putida is structurally very similar to PobA from Pseudomonas fluorescens and from Pseudomonas aeruginosa. Key secondary-structure elements important for catalysis, such as the betaalphabeta fold, beta-sheet wall and alpha12 helix, are conserved across this expanded class of oxygenases
-
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