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Information on EC 1.8.1.4 - dihydrolipoyl dehydrogenase

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EC Tree
IUBMB Comments
A flavoprotein (FAD). A component of the multienzyme 2-oxo-acid dehydrogenase complexes. In the pyruvate dehydrogenase complex, it binds to the core of EC 2.3.1.12, dihydrolipoyllysine-residue acetyltransferase, and catalyses oxidation of its dihydrolipoyl groups. It plays a similar role in the oxoglutarate and 3-methyl-2-oxobutanoate dehydrogenase complexes. Another substrate is the dihydrolipoyl group in the H-protein of the glycine-cleavage system ({AminoAcid/GlyCleave} for diagram), in which it acts, together with EC 1.4.4.2, glycine dehydrogenase (decarboxylating), and EC 2.1.2.10, aminomethyltransferase, to break down glycine. It can also use free dihydrolipoate, dihydrolipoamide or dihydrolipoyllysine as substrate. This enzyme was first shown to catalyse the oxidation of NADH by methylene blue; this activity was called diaphorase. The glycine cleavage system is composed of four components that only loosely associate: the P protein (EC 1.4.4.2), the T protein (EC 2.1.2.10), the L protein (EC 1.8.1.4) and the lipoyl-bearing H protein .
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This record set is specific for:
UNIPROT: O81413
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
lipoamide dehydrogenase, dihydrolipoamide dehydrogenase, dldh, l-protein, dihydrolipoyl dehydrogenase, nadh diaphorase, e3 component, lipdh, lipoyl dehydrogenase, nicotinamide adenine dinucleotide diaphorase, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
dehydrogenase, lipoamide
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dehydrolipoate dehydrogenase
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DHLDH
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diaphorase
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dihydrolipoic dehydrogenase
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dihydrolipoyl dehydrogenase
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DLDH
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E3
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E3 component of 2-oxoglutarate dehydrogenase complex
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E3 component of acetoin cleaving system
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E3 component of alpha keto acid dehydrogenase complexes
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E3 component of pyruvate and 2-oxoglutarate dehydrogenases complexes
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E3 component of pyruvate complex
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E3 lipoamide dehydrogenase
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Glycine cleavage system L protein
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Glycine oxidation system L-factor
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LDP-Glc
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LDP-Val
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lipoamide dehydrogenase (NADH)
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lipoamide oxidoreductase (NADH)
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lipoamide reductase
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lipoate dehydrogenase
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lipoic acid dehydrogenase
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lipoyl dehydrogenase
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LPD
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LPD-GLC
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LPD-VAL
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NADH:lipoamide oxidoreductase
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ORF-E3
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REACTION TYPE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
redox reaction
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oxidation
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reduction
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SYSTEMATIC NAME
IUBMB Comments
protein-N6-(dihydrolipoyl)lysine:NAD+ oxidoreductase
A flavoprotein (FAD). A component of the multienzyme 2-oxo-acid dehydrogenase complexes. In the pyruvate dehydrogenase complex, it binds to the core of EC 2.3.1.12, dihydrolipoyllysine-residue acetyltransferase, and catalyses oxidation of its dihydrolipoyl groups. It plays a similar role in the oxoglutarate and 3-methyl-2-oxobutanoate dehydrogenase complexes. Another substrate is the dihydrolipoyl group in the H-protein of the glycine-cleavage system ({AminoAcid/GlyCleave} for diagram), in which it acts, together with EC 1.4.4.2, glycine dehydrogenase (decarboxylating), and EC 2.1.2.10, aminomethyltransferase, to break down glycine. It can also use free dihydrolipoate, dihydrolipoamide or dihydrolipoyllysine as substrate. This enzyme was first shown to catalyse the oxidation of NADH by methylene blue; this activity was called diaphorase. The glycine cleavage system is composed of four components that only loosely associate: the P protein (EC 1.4.4.2), the T protein (EC 2.1.2.10), the L protein (EC 1.8.1.4) and the lipoyl-bearing H protein [6].
CAS REGISTRY NUMBER
COMMENTARY hide
9001-18-7
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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
dihydrolipoamide + NAD+
lipoamide + NADH
show the reaction diagram
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?
ferrileghemoglobin + NADH + H+
ferroleghemoglobin + NAD+
show the reaction diagram
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r
lipoamide + NADH
dihydrolipoamide + NAD+
show the reaction diagram
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?
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
FAD
covalently bound to the protein
KM VALUE [mM]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
0.029
ferrileghemoglobin
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3.38
Lipoamide
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0.058
NADH
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SPECIFIC ACTIVITY [µmol/min/mg]
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
83.06
lipoamide reduction
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
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SwissProt
Manually annotated by BRENDA team
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
enzyme form FlbR-2
Manually annotated by BRENDA team
LOCALIZATION
ORGANISM
UNIPROT
COMMENTARY hide
GeneOntology No.
LITERATURE
SOURCE
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
O81413_SOYBN
500
0
53002
TrEMBL
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MOLECULAR WEIGHT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
50027
x * 50027, MW only of protein, flavin is reduced during analysis, electrospray MS analysis
SUBUNIT
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
dimer
x * 50027, MW only of protein, flavin is reduced during analysis, electrospray MS analysis
PURIFICATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
overexpression in Escherichia coli
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Moran, J.F.; Sun, Z.; Sarath, G.; Arredondo-Peter, R.; James, E.K.; Becana, M.; Klucas, R.V.
Molecular cloning, functional characterization, and subcellular localization of soybean nodule dihydrolipoamide reductase
Plant Physiol.
128
300-313
2002
Glycine max (O81413), Glycine max
Manually annotated by BRENDA team