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Information on EC 1.5.5.1 - electron-transferring-flavoprotein dehydrogenase
for references in articles please use BRENDA:EC1.5.5.1
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EC Tree 1 Oxidoreductases
1.5 Acting on the CH-NH group of donors
1.5.5 With a quinone or similar compound as acceptor
1.5.5.1 electron-transferring-flavoprotein dehydrogenase
IUBMB Comments
An iron-sulfur flavoprotein, forming part of the mitochondrial electron-transfer system.
The enzyme appears in viruses and cellular organisms
- 1.5.5.1
- acyl-coa
- riboflavin
-
glutaric
- dehydrogenases
- flavin
- myopathy
-
late-onset
- carnitine
-
dehydrogenation
- acylcarnitine
- acidemia
-
riboflavin-responsive
-
beta-oxidation
- semiquinone
-
acyl-coenzyme
- butyryl-coa
- paracoccus
- isovaleryl-coa
- glutaryl-coa
-
ethylmalonic
- medicine
Reaction Schemes
showSynonyms
electron transfer flavoprotein, etfdh, etf-qo, etf:qo, electron transfer flavoprotein dehydrogenase, etf dehydrogenase, electron transfer flavoprotein-ubiquinone oxidoreductase, etf-ubiquinone oxidoreductase, electron transfer flavoprotein:ubiquinone oxidoreductase, electron-transferring-flavoprotein dehydrogenase, more
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SYNONYM 
ORGANISM
UNIPROT
COMMENTARY 
LITERATURE
BCAL1468
BCAS0609
electron flavoprotein reductase
-
-
-
-
electron transfer flavoprotein dehydrogenase
electron transfer flavoprotein Q oxidoreductase
-
-
-
-
electron transfer flavoprotein ubiquinone oxidoreductase
electron transfer flavoprotein-ubiquinone oxidoreductase
electron transfer flavoprotein:ubiquinone oxidoreductase
electron-transfer flavoprotein-2,3-dimethoxy-5-methyl-1,4-benzoquinone oxidoreductase
-
-
Electron-transferring-flavoprotein dehydrogenase
ETF dehydrogenase
ETF-QO
ETF-ubiquinone oxidoreductase
ETF:QO
ETF:quinone oxidoreductase
ETF:ubiquinone oxidoreductase
-
-
-
-
EtfA2
ETFDH
ETFDH1
ETFDH2
electron transfer flavoprotein dehydrogenase
-
-
-
-
electron transfer flavoprotein-ubiquinone oxidoreductase
-
-
-
-
electron transfer flavoprotein-ubiquinone oxidoreductase
-
-
Electron-transferring-flavoprotein dehydrogenase
-
-
-
-
ETF dehydrogenase
-
-
-
-
ETF-QO
-
-
-
-
ETF-ubiquinone oxidoreductase
-
-
-
-
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REACTION
REACTION DIAGRAM
COMMENTARY
ORGANISM
UNIPROT
LITERATURE
reduced electron-transferring flavoprotein + ubiquinone = electron-transferring flavoprotein + ubiquinol
reduced electron-transferring flavoprotein + ubiquinone = electron-transferring flavoprotein + ubiquinol
-
-
-
-
reduced electron-transferring flavoprotein + ubiquinone = electron-transferring flavoprotein + ubiquinol
electrostatic interaction between enzyme and electron-transferring flavoprotein
-
reduced electron-transferring flavoprotein + ubiquinone = electron-transferring flavoprotein + ubiquinol
when enzyme is reduced to a two-electron reduced state, with one electron at each redox center, it is primed to reduce ubiquinone via FAD
-
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
oxidation
-
-
-
-
redox reaction
-
-
-
-
reduction
-
-
-
-
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PATHWAY SOURCE
PATHWAYS
BRENDA
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SYSTEMATIC NAME
IUBMB Comments
electron-transferring-flavoprotein:ubiquinone oxidoreductase
An iron-sulfur flavoprotein, forming part of the mitochondrial electron-transfer system.
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CAS REGISTRY NUMBER
COMMENTARY
86551-03-3
-
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SUBSTRATE
PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
LITERATURE
COMMENTARY
Reversibility
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
electron-transferring flavoprotein + hydroquinone electron transferring flavoprotein + ubiquinol
semiquinone electron transferring flavoprotein + ubiquinone
-
Substrates: -
Products: -
Products: -
r
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-pentyl-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-pentyl-1,4-benzoquinol
-
Substrates: -
Products: -
Products: -
r
reduced electron-transferring flavoprotein + 2,6-dichloroindophenol
electron-transferring flavoprotein + reduced 2,6-dichloroindophenol
reduced electron-transferring flavoprotein + 6-(10-bromodecyl)ubiquinone
electron-transferring flavoprotein + 6-(10-bromodecyl)ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 6-(10-hydroxydecyl)ubiquinone
electron-transferring flavoprotein + 6-(10-hydroxydecyl)ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 6-heptylubiquinone
electron-transferring flavoprotein + 6-heptylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 6-nonylubiquinone
electron-transferring flavoprotein + 6-nonylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + coenzyme Q1
electron-transferring flavoprotein + reduced coenzyme Q1
reduced electron-transferring flavoprotein + decylubiquinone
electron-transferring flavoprotein + decylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + nitro blue tetrazolium
electron transferring-flavoprotein + reduced nitro blue tetrazolium
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
reduced electron-transferring flavoprotein + ubiquinone-2
electron-transferring flavoprotein + ubiquinol-2
reduced electron-transferring flavoprotein + ubiquinone-4
electron-transferring flavoprotein + ubiquinol-4
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein-4'-deoxy-FAD + ubiquinone-1
electron-transferring flavoprotein-4'-deoxy-FAD + ubiquinol-1
-
Substrates: 0.07% of turnover with native electron-transferring flavoprotein
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + 2,5-dibromo-3-methyl-6-isopropyl-4-benzoquinone
electron-transferring-flavoprotein + 2,5-dibromo-3-methyl-6-isopropyl-4-benzoquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + 6-bis(isoprenyl)ubiquinone
electron-transferring-flavoprotein + 6-bis(isoprenyl)ubiquinol
-
Substrates: optimal ubiquinone derivative
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + 6-isoprenylubiquinone
electron-transferring-flavoprotein + 6-isoprenylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + bromodecylubiquinone
electron-transferring-flavoprotein + bromodecylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + decylubiquinone
electron-transferring-flavoprotein + decylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + duroquinone
electron-transferring-flavoprotein + duroquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + heptylubiquinone
electron-transferring-flavoprotein + heptylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + hydroxydecylubiquinone
electron-transferring-flavoprotein + hydroxydecylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + menadione
electron-transferring-flavoprotein + menadiol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + nonylubiquinone
electron-transferring-flavoprotein + nonylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + pentadecylubiquinone
electron-transferring-flavoprotein + pentadecylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + tridecylubiquinone
electron-transferring-flavoprotein + tridecylubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
semiquinone electron transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + hydroquinone electron transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
semiquinone electron transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + hydroquinone electron transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
r
semiquinone electron transferring flavoprotein + ubiquinone Q1
electron-transferring flavoprotein + hydroquinone electron transferring flavoprotein + ubiquinol Q1
-
Substrates: -
Products: -
Products: -
r
semiquinone electron-transferring flavoprotein + ubiquinone Q1
electron-transferring flavoprotein + hydroquinone electron-transferring flavoprotein + ubiquinol Q1
-
Substrates: -
Products: -
Products: -
r
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: trivial name ubiquinone-1, enzyme is an efficient electron acceptor for electron-transferring flavoprotein and a reductase of ubiqinone
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: pig liver or Paracoccus denitrificans electron-transferring flavoprotein as electron carrier
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,6-dichloroindophenol
electron-transferring flavoprotein + reduced 2,6-dichloroindophenol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,6-dichloroindophenol
electron-transferring flavoprotein + reduced 2,6-dichloroindophenol
Agrobacterium tumefaciens C58 / ATCC 33970
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + 2,6-dichloroindophenol
electron-transferring flavoprotein + reduced 2,6-dichloroindophenol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + coenzyme Q1
electron-transferring flavoprotein + reduced coenzyme Q1
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + coenzyme Q1
electron-transferring flavoprotein + reduced coenzyme Q1
Agrobacterium tumefaciens C58 / ATCC 33970
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + coenzyme Q1
electron-transferring flavoprotein + reduced coenzyme Q1
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Agrobacterium tumefaciens C58 / ATCC 33970
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: group I electron-transferring flavoprotein, ETF
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: group I electron-transferring flavoprotein, ETF
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: electron transfer via flavin cofactor
Products: -
Products: -
r
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: via FAD
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: via FAD
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: electron-transferring flavoprotein alpha- and beta-subunits contain a FAD cofactor and an AMP molecule, respectively
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: electron transfer via flavin cofactor
Products: -
Products: -
r
reduced electron-transferring flavoprotein + ubiquinone-2
electron-transferring flavoprotein + ubiquinol-2
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone-2
electron-transferring flavoprotein + ubiquinol-2
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone-2
electron-transferring flavoprotein + ubiquinol-2
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
-
Substrates: ETF is the intermediate electron carrier between dehydrogenases and the enzyme, enzyme mediates between eleven mitochondrial proteins and the ubiquinone pool
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
-
Substrates: ubiquinone is 2,3-dimethoxy-5-methyl-1,4-benzoquinone
Products: -
Products: -
?
semiquinone electron transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + hydroquinone electron transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: -
Products: -
Products: -
?
semiquinone electron transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinone
electron-transferring flavoprotein + hydroquinone electron transferring flavoprotein + 2,3-dimethoxy-5-methyl-6-(3-methylbut-2-en)-1,4-benzoquinol
-
Substrates: disproportion and comproportion with ubiqinone-1 as the terminal oxidant
Products: -
Products: -
r
additional information
?
-
Substrates: although Agrobacterium tumefaciens ETF-mediated electron transfer to 2,6-DCIP is observed with a number of different dehydrogenases, the reduction of coenzyme Q1 through the DH/ETF/ETF-QO system is only observed with dimethylglycine dehydrogenase, but not with any of the tested Agrobacterium tumefaciens acyl-CoA dehydrogenases
Products: -
Products: -
?
additional information
?
-
-
Substrates: although Agrobacterium tumefaciens ETF-mediated electron transfer to 2,6-DCIP is observed with a number of different dehydrogenases, the reduction of coenzyme Q1 through the DH/ETF/ETF-QO system is only observed with dimethylglycine dehydrogenase, but not with any of the tested Agrobacterium tumefaciens acyl-CoA dehydrogenases
Products: -
Products: -
?
additional information
?
-
Agrobacterium tumefaciens C58 / ATCC 33970
Substrates: although Agrobacterium tumefaciens ETF-mediated electron transfer to 2,6-DCIP is observed with a number of different dehydrogenases, the reduction of coenzyme Q1 through the DH/ETF/ETF-QO system is only observed with dimethylglycine dehydrogenase, but not with any of the tested Agrobacterium tumefaciens acyl-CoA dehydrogenases
Products: -
Products: -
?
additional information
?
-
-
Substrates: genetic regulatory model
Products: -
Products: -
?
additional information
?
-
-
Substrates: assay method uses dichlorophenolindophenol, DCPIP, as substrate
Products: -
Products: -
?
additional information
?
-
Substrates: enzyme deficiency leads to glutaric acidemia type II
Products: -
Products: -
?
additional information
?
-
-
Substrates: enzyme deficiency leads to glutaric acidemia type II
Products: -
Products: -
?
additional information
?
-
-
Substrates: specificity for different ubiquinone derivatives, overview
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Products: -
?
additional information
?
-
-
Substrates: the electron-transferring flavoprotein beta-D128N mutation occurs in a beta-turn located near the AMP binding site, a region that is involved in intersubunit contacts and establishes outer-sphere interactions with the FAD cofactor, namely at the level of the isoalloxazine moiety. Namely ETF b-D128N and ETF b-R191C,would have an impacton reactive oxygen species generation.The ETF variants show about 70% decreased activity in comparison with the wild-type protein, and establish a rationale for their functional defects
Products: -
Products: -
?
additional information
?
-
Substrates: the recombinant human enzyme is able to transfer electrons from the ETF protein from Agrobacterium tumefaciens strain C58 to 2,6-dichloroindophenol or coenzyme Q1 in an in vitro system
Products: -
Products: -
?
additional information
?
-
-
Substrates: the recombinant human enzyme is able to transfer electrons from the ETF protein from Agrobacterium tumefaciens strain C58 to 2,6-dichloroindophenol or coenzyme Q1 in an in vitro system
Products: -
Products: -
?
additional information
?
-
-
Substrates: mechanism of superoxide formation by ETF-QO, reduction potentials of redox centres, overview
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Products: -
?
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NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
LITERATURE
COMMENTARY
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
r=reversible
ir=irreversible
?=not specified
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Agrobacterium tumefaciens C58 / ATCC 33970
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: group I electron-transferring flavoprotein, ETF
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: group I electron-transferring flavoprotein, ETF
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: via FAD
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: via FAD
Products: -
Products: -
?
reduced electron-transferring flavoprotein + ubiquinone
electron-transferring flavoprotein + ubiquinol
-
Substrates: electron transfer via flavin cofactor
Products: -
Products: -
r
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
-
Substrates: -
Products: -
Products: -
?
reduced electron-transferring-flavoprotein + ubiquinone
electron-transferring-flavoprotein + ubiquinol
-
Substrates: ETF is the intermediate electron carrier between dehydrogenases and the enzyme, enzyme mediates between eleven mitochondrial proteins and the ubiquinone pool
Products: -
Products: -
?
additional information
?
-
-
Substrates: genetic regulatory model
Products: -
Products: -
?
additional information
?
-
Substrates: enzyme deficiency leads to glutaric acidemia type II
Products: -
Products: -
?
additional information
?
-
-
Substrates: enzyme deficiency leads to glutaric acidemia type II
Products: -
Products: -
?
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COFACTOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
4Fe-4S-center
-
iron-sulfur flavoprotein that contains a single [4Fe-4S]2+,1+
iron-sulfur center
enzyme ETFDH is a monomer containing a FAD molecule and an iron-sulfur cluster
FAD
-
the enzyme contains one FAD, FAD is involved in electron transfer to ubiquinone but not in electron transfer from electron-transferring flavoprotein to ETF-QO
FAD
-
bound by the C-terminal region of the alpha-subunit (domain II) of electron transfer flavoprotein
FAD
-
bound by the C-terminal region of the alpha-subunit (domain II) of electron transfer flavoprotein
FAD
enzyme ETFDH is a monomer containing a FAD molecule and an iron-sulfur cluster
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METALS and IONS
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
4Fe-4S
-
the enzyme contains one [4Fe-4S]2+,1+, the iron-sulfur cluster is the immediate acceptor from electron-transferring flavoprotein
4Fe-4S centre
Fe2+
Fe2+/Fe3+
Iron
Fe2+
enzyme ETFDH is a monomer containing a FAD molecule and an iron-sulfur cluster
Fe2+/Fe3+
-
enzyme contains one ferredoxin-type 4Fe-4S1+,2+ cluster. The cluster is diamagnetic in the isolated oxidized enzyme, and becomes paramagnetic if enzymatically or dithionite reduced. The enzyme accepts a maximum of 2 electrons from electron-transferring flavoprotein whereas it can be reduced by 3 electrons with dithionite or photochemically
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INHIBITOR
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
N-ethylmaleimide
-
inhibitory to thiolated enzyme, no inhibition of unmodified enzyme
p-chloromercuribenzoate
-
complete inhibition of ubiquinone reductase activity, 70% inhibition of disproportion activity
additional information
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Klebsiella pneumoniae NifA-dependent promotor regulation of fixABCX operon
-
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ACTIVATING COMPOUND
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
additional information
-
Klebsiella pneumoniae NifA-dependent promotor regulation of fixABCX operon
-
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KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY
LITERATURE
IMAGE
additional information
additional information
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substrate binding and steady-state reaction kinetics
-
0.0042
electron-transferring flavoprotein
-
comproportionation at pH 7.4, acetylated enzyme
0.0058
electron-transferring flavoprotein
-
disproportionation of semiquinone electron-transferring flavoprotein