EC Explorer

[browse EC tree] - [search]

EC 1.17.99.4 Details

show Brenda entry

EC number

1.17.99.4

Accepted name

uracil/thymine dehydrogenase

Reaction

(1) uracil + H₂O + acceptor = barbiturate + reduced acceptor;;(2) thymine + H₂O + acceptor = 5-methylbarbiturate + reduced acceptor

Other name(s)

uracil oxidase, uracil-thymine oxidase, uracil dehydrogenase

Systematic name

uracil:acceptor oxidoreductase

CAS registry number

9029-00-9

Comment

Forms part of the oxidative pyrimidine-degrading pathway in some microorganisms, along with EC 3.5.2.1 (barbiturase) and EC 3.5.1.95 (N-malonylurea hydrolase). Mammals, plants and other microorganisms utilize the reductive pathway, comprising EC 1.3.1.1 [dihydrouracil dehydrogenase (NAD⁺)] or EC 1.3.1.2 [dihydropyrimidine dehydrogenase (NADP⁺)], EC 3.5.2.2 (dihydropyrimidinase) and EC 3.5.1.6 (β-ureidopropionase), with the ultimate degradation products being an L-amino acid, NH₃ and CO₂ [5].

History

created 1961 as EC 1.2.99.1, transferred 1984 to EC 1.1.99.19, transferred 2006 to EC 1.17.99.4

EC Tree

1 Oxidoreductases

1.1 Acting on the CH-OH group of donors

1.2 Acting on the aldehyde or oxo group of donors

1.3 Acting on the CH-CH group of donors

1.4 Acting on the CH-NH₂ group of donors

1.5 Acting on the CH-NH group of donors

1.6 Acting on NADH or NADPH

1.7 Acting on other nitrogenous compounds as donors

1.8 Acting on a sulfur group of donors

1.9 Acting on a heme group of donors

1.10 Acting on diphenols and related substances as donors

1.11 Acting on a peroxide as acceptor

1.12 Acting on hydrogen as donor

1.13 Acting on single donors with incorporation of molecular oxygen (oxygenases)

1.14 Acting on paired donors, with incorporation or reduction of molecular oxygen

1.15 Acting on superoxide as acceptor

1.16 Oxidizing metal ions

1.17 Acting on CH or CH₂ groups

1.18 Acting on iron-sulfur proteins as donors

1.19 Acting on reduced flavodoxin as donor

1.20 Acting on phosphorus or arsenic in donors

1.21 Catalysing the reaction X-H + Y-H = X-Y

1.21.1 With NAD⁺ or NADP⁺ as acceptor

1.21.3 With oxygen as acceptor

1.21.4 With a disulfide as acceptor

1.21.98 With other, known, physiological acceptors

1.21.99 With unknown physiological acceptors

1.22 Acting on halogen in donors

1.23 Reducing C-O-C group as acceptor

1.97 Other oxidoreductases

1.98 Enzymes using H₂ as reductant (deleted subclass)

1.99 Other enzymes using O₂ as oxidant (deleted subclass)

2 Transferases

3 Hydrolases

3.1 Acting on ester bonds

3.1.1 Carboxylic-ester hydrolases

3.1.2 Thioester hydrolases

3.1.3 Phosphoric-monoester hydrolases

3.1.4 Phosphoric-diester hydrolases

3.1.5 Triphosphoric-monoester hydrolases

3.1.6 Sulfuric-ester hydrolases

3.1.7 Diphosphoric-monoester hydrolases

3.1.8 Phosphoric-triester hydrolases

3.1.11 Exodeoxyribonucleases producing 5′-phosphomonoesters

3.1.12 Exodeoxyribonucleases producing 3′-phosphomonoesters

3.1.13 Exoribonucleases producing 5′-phosphomonoesters

3.1.13.1 exoribonuclease II

3.1.13.2 exoribonuclease H

3.1.13.3 oligonucleotidase

3.1.13.4 poly(A)-specific ribonuclease

3.1.13.5 ribonuclease D

3.1.14 Exoribonucleases producing 3'-phosphomonoesters

3.1.15 Exonucleases that are active with either ribo- or deoxyribonucleic acids and produce 5'-phosphomonoesters

3.1.16 Exonucleases that are active with either ribo- or deoxyribonucleic acids and produce 3'-phosphomonoesters

3.1.21 Endodeoxyribonucleases producing 5'-phosphomonoesters

3.1.22 Endodeoxyribonucleases producing 3'-phosphomonoesters

3.1.23 Site-specific endodeoxyribonucleases: cleavage is sequence specific (deleted sub-subclass)

3.1.23.1 created 1978, deleted 1984

3.1.23.2 created 1978, deleted 1984

3.1.23.3 created 1978, deleted 1984

3.1.23.4 created 1978, deleted 1984

3.1.23.5 created 1978, deleted 1984

3.1.23.6 created 1978, deleted 1984

3.1.23.7 created 1978, deleted 1984

3.1.23.8 created 1978, deleted 1984

3.1.23.9 created 1978, deleted 1984

3.1.23.10 created 1978, deleted 1984

3.1.23.11 created 1978, deleted 1984

3.1.23.12 created 1978, modified 1982, deleted 1984

3.1.23.13 created 1978, deleted 1984

3.1.23.14 created 1978, deleted 1984

3.1.23.15 created 1978, deleted 1984

3.1.23.16 created 1978, deleted 1984

3.1.23.17 created 1978, deleted 1984

3.1.23.18 created 1978, deleted 1984

3.1.23.19 created 1978, deleted 1984

3.1.23.20 created 1978, deleted 1984

3.1.23.21 created 1978, deleted 1984

3.1.23.22 created 1978, deleted 1984

3.1.23.23 created 1978, deleted 1984

3.1.23.24 created 1978, deleted 1984

3.1.23.25 created 1978, deleted 1984

3.1.23.26 created 1978, deleted 1984

3.1.23.27 created 1978, deleted 1984

3.1.23.28 created 1978, deleted 1984

3.1.23.29 created 1978, deleted 1984

3.1.23.30 created 1978, modified 1982, deleted 1984

3.1.23.31 created 1978, deleted 1984

3.1.23.32 created 1978, modified 1982, deleted 1984

3.1.23.33 created 1978, deleted 1984

3.1.23.34 created 1978, deleted 1984

3.1.23.35 created 1978, deleted 1984

3.1.23.36 created 1978, deleted 1984

3.1.23.37 created 1978, deleted 1984

3.1.23.38 created 1978, deleted 1984

3.1.23.39 created 1978, deleted 1984

3.1.23.40 created 1978, deleted 1984

3.1.23.41 created 1978, deleted 1984

3.1.23.42 created 1978, deleted 1984

3.1.23.43 created 1978, modified 1982, deleted 1984

3.1.23.44 created 1978, deleted 1984

3.1.23.45 created 1978, modified 1982, deleted 1984

3.1.23.46 created 1982, deleted 1984

3.1.23.47 created 1982, deleted 1984

3.1.23.48 created 1982, deleted 1984

3.1.23.49 created 1982, deleted 1984

3.1.23.50 created 1982, deleted 1984

3.1.23.51 created 1982, deleted 1984

3.1.23.52 created 1982, deleted 1984

3.1.23.53 created 1982, deleted 1984

3.1.23.54 created 1982, deleted 1984

3.1.23.55 created 1982, deleted 1984

3.1.23.56 created 1982, deleted 1984

3.1.23.57 created 1982, deleted 1984

3.1.23.58 created 1982, deleted 1984

3.1.23.59 created 1982, deleted 1984

3.1.23.60 created 1982, deleted 1984

3.1.23.61 created 1982, deleted 1984

3.1.23.62 created 1982, deleted 1984

3.1.23.63 created 1982, deleted 1984

3.1.23.64 created 1982, deleted 1984

3.1.23.65 created 1982, deleted 1984

3.1.23.66 created 1982, deleted 1984

3.1.23.67 created 1982, deleted 1984

3.1.23.68 created 1982, deleted 1984

3.1.23.69 created 1982, deleted 1984

3.1.23.70 created 1982, deleted 1984

3.1.23.71 created 1982, deleted 1984

3.1.23.72 created 1982, deleted 1984

3.1.23.73 created 1982, deleted 1984

3.1.23.74 created 1982, deleted 1984

3.1.23.75 created 1982, deleted 1984

3.1.23.76 created 1982, deleted 1984

3.1.23.77 created 1982, deleted 1984

3.1.23.78 created 1982, deleted 1984

3.1.23.79 created 1982, deleted 1984

3.1.23.80 created 1982, deleted 1984

3.1.23.81 created 1982, deleted 1984

3.1.23.82 created 1982, deleted 1984

3.1.23.83 created 1982, deleted 1984

3.1.23.84 created 1982, deleted 1984

3.1.23.85 created 1982, deleted 1984

3.1.23.86 created 1982, deleted 1984

3.1.23.87 created 1982, deleted 1984

3.1.23.88 created 1982, deleted 1984

3.1.23.89 created 1982, deleted 1984

3.1.23.90 created 1982, deleted 1984

3.1.23.91 created 1982, deleted 1984

3.1.23.92 created 1982, deleted 1984

3.1.23.93 created 1982, deleted 1984

3.1.23.94 created 1982, deleted 1984

3.1.23.95 created 1982, deleted 1984

3.1.23.96 created 1982, deleted 1984

3.1.23.97 created 1982, deleted 1984

3.1.23.98 created 1982, deleted 1984

3.1.23.99 created 1982, deleted 1984

3.1.23.100 created 1982, deleted 1984

3.1.23.101 created 1982, deleted 1984

3.1.23.102 created 1982, deleted 1984

3.1.23.103 created 1982, deleted 1984

3.1.23.104 created 1982, deleted 1984

3.1.23.105 created 1982, deleted 1984

3.1.23.106 created 1982, deleted 1984

3.1.23.107 created 1982, deleted 1984

3.1.23.108 created 1982, deleted 1984

3.1.23.109 created 1982, deleted 1984

3.1.24 Site specific endodeoxyribonucleases: cleavage is not sequence specific (deleted sub-subclass)

3.1.25 Site-specific endodeoxyribonucleases that are specific for altered bases

3.1.26 Endoribonucleases producing 5'-phosphomonoesters

3.1.27 Endoribonucleases producing 3'-phosphomonoesters

3.1.30 Endoribonucleases that are active with either ribo- or deoxyribonucleic acids and produce 5'-phosphomonoesters

3.1.31 Endoribonucleases that are active with either ribo- or deoxyribonucleic acids and produce 3'-phosphomonoesters

3.2 Glycosylases

3.3 Acting on ether bonds

3.4 Acting on peptide bonds (peptidases)

3.5 Acting on carbon-nitrogen bonds, other than peptide bonds

3.6 Acting on acid anhydrides

3.7 Acting on carbon-carbon bonds

3.8 Acting on halide bonds

3.9 Acting on phosphorus-nitrogen bonds

3.10 Acting on sulfur-nitrogen bonds

3.10.1 Acting on sulfur-nitrogen bonds (only sub-subclass identified to date)

3.11 Acting on carbon-phosphorus bonds

3.12 Acting on sulfur-sulfur bonds

3.13 Acting on carbon-sulfur bonds