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Ligand thiamine diphosphate

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Basic Ligand Information

Molecular Structure
Picture of thiamine diphosphate (click for magnification)
Molecular Formula
BRENDA Name
InChIKey
Molfile
C12H18N4O7P2S
thiamine diphosphate
AYEKOFBPNLCAJY-UHFFFAOYSA-O
Synonyms:
thiamin diphosphate, thiamindiphosphate, thiamine diphosphate[side 2], ThPP, TPP

Related pathways

Pathway Source
Pathways
MetaCyc
thiamine diphosphate biosynthesis I (E. coli), thiamine diphosphate biosynthesis II (Bacillus), thiamine diphosphate biosynthesis III (Staphylococcus), thiamine diphosphate biosynthesis IV (eukaryotes), thiamine diphosphate salvage I more


Show all pahtways known for Show all BRENDA pathways known for thiamine diphosphate

Roles as Enzyme Ligand

In Vivo Substrate in Enzyme-catalyzed Reactions (5 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
thiamine diphosphate + H2O = thiamine phosphate + phosphate
show the reaction diagram
-
thiamine diphosphate + 2 H2O = thiamine + 2 phosphate
show the reaction diagram
-
thiamine diphosphate + H2O = ?
show the reaction diagram
-

In Vivo Product in Enzyme-catalyzed Reactions (9 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
thiamine triphosphate + H2O = thiamine diphosphate + phosphate
show the reaction diagram

Substrate in Enzyme-catalyzed Reactions (15 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
pyruvate + CoA + thiamine diphosphate = acetyl-CoA + CO2 + ?
show the reaction diagram
-
thiamin diphosphate + H2O = thiamin phosphate + phosphate
show the reaction diagram
-
thiamine diphosphate + H2O = thiamine phosphate + phosphate
show the reaction diagram
-
thiamine diphosphate + H2O = ?
show the reaction diagram
-
thiamine diphosphate + H2O = thiamine monophosphate + phosphate
show the reaction diagram
thiamine diphosphate + 2 H2O = thiamine + 2 phosphate
show the reaction diagram
-
TPP + H2O = thiamine phosphate + phosphate
show the reaction diagram
-

Product in Enzyme-catalyzed Reactions (13 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE

Enzyme Cofactor/Cosubstrate (3330 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
reaction is strictly dependent on
-
optimal activity at 0.004 mM, absolute requirement
-
1.6 mol per mol of enzyme
-
requirement, thiamine diphosphate protein
-
required
-
required
-
10% stimulation at 0.16 mM, 65% stimulation at 0.4 mM
-
tightly bound to the enzyme
-

Activator in Enzyme-catalyzed Reactions (186 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
exogenous addition activates, involved in conformational changes
-
KGDHC is saturated with endogenous tightly bound thiamine diphosphate, but the addition of exogenous thiamine diphosphate to the reaction medium leads to a marked increase in KGDHC affinity to 2-oxoglutarate
-
E1 binds thiamine diphosphate, possessing two thiamine-binding pockets located between alpha and beta subunits
-
dependent on
-
0.9 mol per mol of enzyme, stimulates but is not essential, Km: 0.009 mM
-

Inhibitor in Enzyme-catalyzed Reactions (40 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
inactivation at 0.006 mM
-
17% inhibition at 0.2 mM
-

Metals and Ions (6 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE

3D Structure of Enzyme-Ligand-Complex (PDB) (1451 results)

EC NUMBER
ENZYME 3D STRUCTURE

Enzyme Kinetic Parameters

kcat Value (Turnover Number) (32 results)

EC NUMBER
TURNOVER NUMBER [1/S]
TURNOVER NUMBER MAXIMUM [1/S]
COMMENTARY
LITERATURE
0.48
-
pH 37°C, pH 5.6, 1 mM MgCl2, Vmax: 1.38 micromol/min/mg

KM Value (61 results)

EC NUMBER
KM VALUE [MM]
KM VALUE MAXIMUM [MM]
COMMENTARY
LITERATURE
0.28
-
-
1.1
-
-
4.2
-
pH 6.5, 37°C, cosubstrate: ADP
0.036
-
at pH 5.0, temperature not specified in the publication
0.66
-
in presence of Mn2+
0.013
-
25°C, pH 7.3

Ki Value (2 results)

EC NUMBER
KI VALUE [MM]
KI VALUE MAXIMUM [MM]
COMMENTARY
LITERATURE

IC50 Value (3 results)

EC NUMBER
IC50 VALUE
IC50 VALUE MAXIMUM
COMMENTARY
LITERATURE

References & Links

Links to other databases for thiamine diphosphate

EXTERNAL LINKS