Any feedback?
Please rate this page
(ligand.php)
(0/150)

BRENDA support

Ligand Polyphosphate

Please wait a moment until all data is loaded. This message will disappear when all data is loaded.

Basic Ligand Information

Molecular Structure
Picture of Polyphosphate (click for magnification)
Molecular Formula
BRENDA Name
InChIKey
H6O15P5R
Polyphosphate
Synonyms:
(Phosphate)n

Roles as Enzyme Ligand

In Vivo Substrate in Enzyme-catalyzed Reactions (13 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
dolichyl diphosphate + (phosphate)n = dolichyl phosphate + (phosphate)n+1
show the reaction diagram
-
GTP + (phosphate)n = GDP + (phosphate)n+1
show the reaction diagram
-
(phosphate)n + H2O = (phosphate)n-1 + phosphate
show the reaction diagram
-
polyphosphate + 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
GDP + (phosphate)n+1 = GTP + (phosphate)n
show the reaction diagram
-

Substrate in Enzyme-catalyzed Reactions (37 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
dolichyl diphosphate + (phosphate)n = dolichyl phosphate + (phosphate)n+1
show the reaction diagram
-
GTP + (phosphate)n = GDP + (phosphate)n+1
show the reaction diagram
-
NDP + polyphosphate = polyphosphate + NDP
show the reaction diagram
-
polyphosphate + H2O = ?
show the reaction diagram
-
polyphosphate + H2O = ?
show the reaction diagram
-
polyphosphate + H2O = ?
show the reaction diagram
-
polyphosphate + H2O = oligophosphate
show the reaction diagram
-
polyphosphate + H2O = ?
show the reaction diagram
-
polyphosphate + H2O = ?
show the reaction diagram
-
polyphosphate + H2O = ?
show the reaction diagram
-

Product in Enzyme-catalyzed Reactions (33 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
NDP + polyphosphate = polyphosphate + NDP
show the reaction diagram
-

Activator in Enzyme-catalyzed Reactions (13 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
addition of inorganic polyphosphate (PPin) inhibits or activates glycerol kinase due to the complexation of PPin with Mg2+ that shifts Mg2+ to ATP molar ratio below or to the optimum level
-
dependent on, can be substituted by ATP, nonprocessive utilization, binding site is the same as for ATP binding
-
stimulation
-
PolyP, secreted by activated platelets, a highly anionic polymer, polyphosphate plus beta-thrombin accelerates plasma clotting and enhances thrombin generation, kinetics, overview. Thrombin binds with high affinity to immobilized polyphosphate. Polyphosphate accelerates factor XI autoactivation and factor XIa autolysis
-

Inhibitor in Enzyme-catalyzed Reactions (13 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
addition of inorganic polyphosphate (PPin) inhibits or activates glycerol kinase due to the complexation of polyphosphate with Mg2+ that shifts Mg2+ to ATP molar ratio below or to the optimum level
-
substrate inhibition above 5 mM
-
substrate inhibition above 5 mM
-
polyP15, 50% inhibition at 200fold polymer molar excess over the long-chain polyphosphate substrate
-

Enzyme Kinetic Parameters

kcat Value (Turnover Number) (14 results)

EC NUMBER
TURNOVER NUMBER [1/S]
TURNOVER NUMBER MAXIMUM [1/S]
COMMENTARY
LITERATURE
1.1
-
-
3.5
-
in the presence of Zn2+, pH 7.5, 25°C

KM Value (27 results)

EC NUMBER
KM VALUE [MM]
KM VALUE MAXIMUM [MM]
COMMENTARY
LITERATURE
0.378
-
pH 4.8, 37°C
3.3
-
-
3.3
-
-
0.0000005
-
-
0.014
-
in the presence of Zn2+, pH 7.5, 25°C

References & Links

Links to other databases for Polyphosphate

ChEBI
PubChem
-
-