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Information on EC 1.2.4.1 - pyruvate dehydrogenase (acetyl-transferring)

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IUBMB Comments
Contains thiamine diphosphate. It is a component (in multiple copies) of the multienzyme pyruvate dehydrogenase complex, EC 1.2.1.104, in which it is bound to a core of molecules of EC 2.3.1.12, dihydrolipoyllysine-residue acetyltransferase, which also binds multiple copies of EC 1.8.1.4, dihydrolipoyl dehydrogenase. It does not act on free lipoamide or lipoyllysine, but only on the lipoyllysine residue in EC 2.3.1.12.
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This record set is specific for:
UNIPROT: P08559
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Word Map
The enzyme appears in viruses and cellular organisms
Synonyms
pdh, pdha1, mitochondrial pyruvate dehydrogenase, e1alpha, pyruvate dehydrogenase multienzyme complex, pyruvate dehydrogenase e1, pdhc-e1, mtpdc, pdhc e1, pyruvate dehydrogenase e1 component, more
SYNONYM
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
PDHE1alpha
E1 alpha subunit of pyruvate dehydrogenase
pyruvate dehydrogenase multienzyme complex
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thiamin-dependent pyruvate dehydrogenase
part of the pyruvate dehydrogenase multienzyme complex PDHc as component E1
dehydrogenase, pyruvate
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MtPDC
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PDH
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pyruvate decarboxylase
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pyruvate dehydrogenase
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pyruvate dehydrogenase complex
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pyruvic acid dehydrogenase
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pyruvic dehydrogenase
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VEG220
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Vegetative protein 220
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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
pyruvate:[dihydrolipoyllysine-residue acetyltransferase]-lipoyllysine 2-oxidoreductase (decarboxylating, acceptor-acetylating)
Contains thiamine diphosphate. It is a component (in multiple copies) of the multienzyme pyruvate dehydrogenase complex, EC 1.2.1.104, in which it is bound to a core of molecules of EC 2.3.1.12, dihydrolipoyllysine-residue acetyltransferase, which also binds multiple copies of EC 1.8.1.4, dihydrolipoyl dehydrogenase. It does not act on free lipoamide or lipoyllysine, but only on the lipoyllysine residue in EC 2.3.1.12.
CAS REGISTRY NUMBER
COMMENTARY hide
9014-20-4
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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
pyruvate + CoA + NAD+
acetyl-CoA + CO2 + NADH
show the reaction diagram
NATURAL SUBSTRATE
NATURAL PRODUCT
REACTION DIAGRAM
ORGANISM
UNIPROT
COMMENTARY
(Substrate) hide
LITERATURE
(Substrate)
COMMENTARY
(Product) hide
LITERATURE
(Product)
REVERSIBILITY
r=reversible
ir=irreversible
?=not specified
pyruvate + CoA + NAD+
acetyl-CoA + CO2 + NADH
show the reaction diagram
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?
COFACTOR
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
thiamine diphosphate
ORGANISM
COMMENTARY hide
LITERATURE
UNIPROT
SEQUENCE DB
SOURCE
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UniProt
Manually annotated by BRENDA team
SOURCE TISSUE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
SOURCE
UNIPROT
ENTRY NAME
ORGANISM
NO. OF AA
NO. OF TRANSM. HELICES
MOLECULAR WEIGHT[Da]
SOURCE
SEQUENCE
LOCALIZATION PREDICTION?
ODPA_HUMAN
390
0
43296
Swiss-Prot
Mitochondrion (Reliability: 1)
POSTTRANSLATIONAL MODIFICATION
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
phosphoprotein
the PDC is tightly regulated by reversible phosphorylation at three known phosphorylation sites on PDHE1a: Ser293, Ser300, and Ser232
phosphorylation
phosphorylation of Ser264 slows the preceding binding of substrate to the enzyme's active site via the substrate channel and the subsequent reductive acetylation of the E2 component
CRYSTALLIZATION (Commentary)
ORGANISM
UNIPROT
LITERATURE
vapour diffusion method with 14-18% PEG 3350, 0.1 mM sodium azide, and 200 mM NaSCN in 50 mM potassium phosphate (pH 8.0)
PROTEIN VARIANTS
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
S264E
pseudophosphorylation mutant, the preceding binding of substrate to the enzyme's active site via the substrate channel and the subsequent reductive acetylation of the E2 component are severely slowed in the mutant enzyme
S264Q
selectively deficient in pyruvate binding and reductive acetylation of component E2
CLONED (Commentary)
ORGANISM
UNIPROT
LITERATURE
expressed in Escherichia coli M15 cells
REF.
AUTHORS
TITLE
JOURNAL
VOL.
PAGES
YEAR
ORGANISM (UNIPROT)
PUBMED ID
SOURCE
Seifert, F.; Ciszak, E.; Korotchkina, L.; Golbik, R.; Spinka, M.; Dominiak, P.; Sidhu, S.; Brauer, J.; Patel, M.S.; Tittmann, K.
Phosphorylation of serine 264 impedes active site accessibility in the E1 component of the human pyruvate dehydrogenase multienzyme complex
Biochemistry
46
6277-6287
2007
Homo sapiens (P08559), Homo sapiens
Manually annotated by BRENDA team
Rardin, M.J.; Wiley, S.E.; Naviaux, R.K.; Murphy, A.N.; Dixon, J.E.
Monitoring phosphorylation of the pyruvate dehydrogenase complex
Anal. Biochem.
389
157-164
2009
Mus musculus, Homo sapiens (P08559)
Manually annotated by BRENDA team