Enzymes
| UniProtKB help_outline | 13,024 proteins |
| Enzyme class help_outline |
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- Name help_outline 5,6-dihydrothymine Identifier CHEBI:27468 (CAS: 696-04-8) help_outline Charge 0 Formula C5H8N2O2 InChIKeyhelp_outline NBAKTGXDIBVZOO-UHFFFAOYSA-N SMILEShelp_outline CC1CNC(=O)NC1=O 2D coordinates Mol file for the small molecule Search links Involved in 3 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline NAD+ Identifier CHEBI:57540 (Beilstein: 3868403) help_outline Charge -1 Formula C21H26N7O14P2 InChIKeyhelp_outline BAWFJGJZGIEFAR-NNYOXOHSSA-M SMILEShelp_outline NC(=O)c1ccc[n+](c1)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,201 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline thymine Identifier CHEBI:17821 (Beilstein: 607626; CAS: 65-71-4) help_outline Charge 0 Formula C5H6N2O2 InChIKeyhelp_outline RWQNBRDOKXIBIV-UHFFFAOYSA-N SMILEShelp_outline Cc1c[nH]c(=O)[nH]c1=O 2D coordinates Mol file for the small molecule Search links Involved in 11 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline NADH Identifier CHEBI:57945 (Beilstein: 3869564) help_outline Charge -2 Formula C21H27N7O14P2 InChIKeyhelp_outline BOPGDPNILDQYTO-NNYOXOHSSA-L SMILEShelp_outline NC(=O)C1=CN(C=CC1)[C@@H]1O[C@H](COP([O-])(=O)OP([O-])(=O)OC[C@H]2O[C@H]([C@H](O)[C@@H]2O)n2cnc3c(N)ncnc23)[C@@H](O)[C@H]1O 2D coordinates Mol file for the small molecule Search links Involved in 1,130 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline H+ Identifier CHEBI:15378 Charge 1 Formula H InChIKeyhelp_outline GPRLSGONYQIRFK-UHFFFAOYSA-N SMILEShelp_outline [H+] 2D coordinates Mol file for the small molecule Search links Involved in 9,717 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:28791 | RHEA:28792 | RHEA:28793 | RHEA:28794 | |
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| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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Publications
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Pyrimidine base catabolism in Pseudomonas putida biotype B.
West T.P.
Reductive catabolism of the pyrimidine bases uracil and thymine was found to occur in Pseudomonas putida biotype B. The pyrimidine reductive catabolic pathway enzymes dihydropyrimidine dehydrogenase, dihydropyrimidinase and N-carbamoyl-beta-alanine amidohydrolase activities were detected in this p ... >> More
Reductive catabolism of the pyrimidine bases uracil and thymine was found to occur in Pseudomonas putida biotype B. The pyrimidine reductive catabolic pathway enzymes dihydropyrimidine dehydrogenase, dihydropyrimidinase and N-carbamoyl-beta-alanine amidohydrolase activities were detected in this pseudomonad. The initial reductive pathway enzyme dihydropyrimidine dehydrogenase utilized NADH or NADPH as its nicotinamide cofactor. The source of nitrogen in the culture medium influenced the reductive pathway enzyme activities and, in particular, dihydropyrimidinase activity was highly affected by nitrogen source. The reductive pathway enzyme activities in succinate-grown P. putida biotype B cells were induced when uracil served as the nitrogen source. << Less
Antonie Van Leeuwenhoek 80:163-167(2001) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Reductive degradation of pyrimidines. III. Purification and properties of dihydrouracil dehydrogenase.
CAMPBELL L.L. Jr.
J Biol Chem 227:693-700(1957) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Escherichia coli dihydropyrimidine dehydrogenase is a novel NAD-dependent heterotetramer essential for the production of 5,6-dihydrouracil.
Hidese R., Mihara H., Kurihara T., Esaki N.
The reductive pyrimidine catabolic pathway is absent in Escherichia coli. However, the bacterium contains an enzyme homologous to mammalian dihydropyrimidine dehydrogenase. Here, we show that E. coli dihydropyrimidine dehydrogenase is the first member of a novel NADH-dependent subclass of iron-sul ... >> More
The reductive pyrimidine catabolic pathway is absent in Escherichia coli. However, the bacterium contains an enzyme homologous to mammalian dihydropyrimidine dehydrogenase. Here, we show that E. coli dihydropyrimidine dehydrogenase is the first member of a novel NADH-dependent subclass of iron-sulfur flavoenzymes catalyzing the conversion of uracil to 5,6-dihydrouracil in vivo. << Less
J. Bacteriol. 193:989-993(2011) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Purification and characterization of dihydropyrimidine dehydrogenase from Alcaligenes eutrophus.
Schmitt U., Jahnke K., Rosenbaum K., Cook P.F., Schnackerz K.D.
Dihydropyrimidine dehydrogenase from Alcaligenes eutrophus was purified to homogeneity using ammonium sulfate fractionation and chromatography on phenyl-Sepharose, MonoQ-Sepharose, and 2,5-ADP-Sepharose. The enzyme is a homotetramer with a subunit molecular mass of 52 kDa. The absorption spectrum ... >> More
Dihydropyrimidine dehydrogenase from Alcaligenes eutrophus was purified to homogeneity using ammonium sulfate fractionation and chromatography on phenyl-Sepharose, MonoQ-Sepharose, and 2,5-ADP-Sepharose. The enzyme is a homotetramer with a subunit molecular mass of 52 kDa. The absorption spectrum of the bacterial dihydropyrimidine dehydrogenase has maxima in the 300- and 400-nm region, suggesting a flavoprotein. The enzyme contains 4 mol FMN, about 24 mol iron and acidlabile sulfide per mole of protein, implying a flavoprotein with FeS centers. The bacterial dehydrogenase is NADPH dependent with B-side stereospecificity. The initial velocity patterns of the bacterial dehydrogenase together with isotope exchange at equilibrium and a quantitative analysis of the product and dead-end inhibition data suggest a rapid equilibrium random kinetic mechanism, which is in contrast to results obtained for dihydropyrimidine dehydrogenase from pig liver. The pig liver enzyme adheres to a nonclassical two-site ping-pong kinetic mechanism [B. Podschun, P. F. Cook, and K. D. Schnackerz (1990) J. Biol. Chem. 265, 12966-12972], whereas for the bovine enzyme a rapid equilibrium random kinetic mechanism was proposed based on steady-state kinetic data [D. J. T. Porter and T. Spector (1993) J. Biol. Chem. 268, 19321-19327]. << Less
Arch Biochem Biophys 332:175-182(1996) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.
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Isolation and characterization of an Escherichia coli B mutant strain defective in uracil catabolism.
West T.P.
A reductive pathway of uracil catabolism was shown to be functioning in Escherichia coli B ATCC 11303 by virtue of thin-layer chromatographic and enzyme analyses. A mutant defective in uracil catabolism was isolated from this strain and subsequently characterized. The three enzyme activities assoc ... >> More
A reductive pathway of uracil catabolism was shown to be functioning in Escherichia coli B ATCC 11303 by virtue of thin-layer chromatographic and enzyme analyses. A mutant defective in uracil catabolism was isolated from this strain and subsequently characterized. The three enzyme activities associated with the reductive pathway of pyrimidine catabolism were detectable in the wild-type E. coli B cells, while the mutant strain was found to be deficient for dihydropyrimidine dehydrogenase activity. The dehydrogenase was shown to utilize NADPH as its nicotinamide cofactor. Growth of ATCC 11303 cells on uracil or glutamic acid instead of ammonium sulfate as a nitrogen source increased the reductive pathway enzyme activities. The mutant strain exhibited increased catabolic enzyme activities after growth on ammonium sulfate or glutamic acid. << Less
Can J Microbiol 44:1106-1109(1998) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.
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Pyrimidine catabolism in Pseudomonas aeruginosa.
Kim S., West T.P.
Pyrimidine catabolism in Pseudomonas aeruginosa was investigated. It was found that the pyrimidine bases uracil and thymidine as well as their respective reductive catabolic products could be utilized as sole sources of nitrogen. Reductive degradation of the pyrimidine bases was noted. The reducti ... >> More
Pyrimidine catabolism in Pseudomonas aeruginosa was investigated. It was found that the pyrimidine bases uracil and thymidine as well as their respective reductive catabolic products could be utilized as sole sources of nitrogen. Reductive degradation of the pyrimidine bases was noted. The reductive catabolic pathway enzymes dihydropyrimidine dehydrogenase, dihydropyrimidinase and N-carbamoyl-beta-alanine amidohydrolase were all detected in minimal medium grown cells. Induction of pyrimidine catabolism by uracil was observed in this pseudomonad. Pyrimidine degradation in P. aeruginosa was not subject to catabolite repression. << Less
FEMS Microbiol Lett 61:175-179(1991) [PubMed] [EuropePMC]
This publication is cited by 1 other entry.