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Information on EC 1.3.5.2 - dihydroorotate dehydrogenase (quinone) and Organism(s) Trypanosoma cruzi and UniProt Accession Q4D3W2

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EC Tree
IUBMB Comments
This Class 2 dihydroorotate dehydrogenase enzyme contains FMN . The enzyme is found in eukaryotes in the mitochondrial membrane, in cyanobacteria, and in some Gram-negative and Gram-positive bacteria associated with the cytoplasmic membrane [2,5,6]. The reaction is the only redox reaction in the de-novo biosynthesis of pyrimidine nucleotides [2,4]. The best quinone electron acceptors for the enzyme from bovine liver are ubiquinone-6 and ubiquinone-7, although simple quinones, such as benzoquinone, can also act as acceptor at lower rates . Methyl-, ethyl-, tert-butyl and benzyl (S)-dihydroorotates are also substrates, but methyl esters of (S)-1-methyl and (S)-3-methyl and (S)-1,3-dimethyldihydroorotates are not . Class 1 dihydroorotate dehydrogenases use either fumarate (EC 1.3.98.1), NAD+ (EC 1.3.1.14) or NADP+ (EC 1.3.1.15) as electron acceptor.
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Trypanosoma cruzi
UNIPROT: Q4D3W2
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Word Map
The taxonomic range for the selected organisms is: Trypanosoma cruzi
The expected taxonomic range for this enzyme is: Bacteria, Eukaryota, Archaea
Synonyms
dihydroorotate dehydrogenase, pfdhodh, hdhodh, dho-dh, hsdhodh, dihydroorotate dehydrogenase (quinone), more
REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
redox reaction
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oxidation
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reduction
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PATHWAY SOURCE
PATHWAYS
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SYSTEMATIC NAME
IUBMB Comments
(S)-dihydroorotate:quinone oxidoreductase
This Class 2 dihydroorotate dehydrogenase enzyme contains FMN [4]. The enzyme is found in eukaryotes in the mitochondrial membrane, in cyanobacteria, and in some Gram-negative and Gram-positive bacteria associated with the cytoplasmic membrane [2,5,6]. The reaction is the only redox reaction in the de-novo biosynthesis of pyrimidine nucleotides [2,4]. The best quinone electron acceptors for the enzyme from bovine liver are ubiquinone-6 and ubiquinone-7, although simple quinones, such as benzoquinone, can also act as acceptor at lower rates [2]. Methyl-, ethyl-, tert-butyl and benzyl (S)-dihydroorotates are also substrates, but methyl esters of (S)-1-methyl and (S)-3-methyl and (S)-1,3-dimethyldihydroorotates are not [2]. Class 1 dihydroorotate dehydrogenases use either fumarate (EC 1.3.98.1), NAD+ (EC 1.3.1.14) or NADP+ (EC 1.3.1.15) as electron acceptor.
CAS REGISTRY NUMBER
COMMENTARY hide
59088-23-2
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SUBSTRATE
PRODUCT                       
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
Reversibility
r=reversible
ir=irreversible
?=not specified
dihydroorotate + 2,6-dichlorophenolindophenol
orotate + reduced 2,6-dichlorophenolindophenol
show the reaction diagram
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?
additional information
?
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enzyme has methylviologen-fumarate reductase activity
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?
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
119000
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cosubstrate O2, pH 7.5
245000
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cosubstrate 2,6-dichlorophenolindophenol, pH 7.5
548000
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cosubstrate Q1, pH 7.5
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
34000
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2 * 34000, SDS-PAGE, dynamic light scattering analysis
35000
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gel filtration
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
homodimer
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2 * 34000, SDS-PAGE, dynamic light scattering analysis
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Takashima, E.; Inaoka, D.K.; Osanai, A.; Nara, T.; Odaka, M.; Aoki, T.; Inaka, K.; Harada, S.; Kita, K.
Characterization of the dihydroorotate dehydrogenase as a soluble fumarate reductase in Trypanosoma cruzi
Mol. Biochem. Parasitol.
122
189-200
2002
Trypanosoma cruzi
Manually annotated by BRENDA team