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Literature summary for 3.6.1.5 extracted from

  • Cote, Y.P.; Quellet, S.; Beaudoin, A.R.
    Kinetic properties of type-II ATP diphosphohydrolase from the tunica media of the bovine aorta (1992), Biochim. Biophys. Acta, 1160, 246-250.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
5'-p-fluorosulfonylbenzoyladenosine
-
Bos taurus
HgCl
-
Bos taurus
additional information no inhibition by Ap5A; no inhibition by ouabain; no inhibition by tetramisole Bos taurus
NaN3 10 mM Bos taurus

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.023
-
ATP
-
Bos taurus

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane ectonucleotidase/ectoenzyme Bos taurus 16020
-

Metals/Ions

Metals/Ions Comment Organism Structure
Ca2+ either Mg2+ or Ca2+ required for activity Bos taurus
Mg2+ maximum activity at 6 and 9 mM with ADP and ATP respectively Bos taurus
Mg2+ either Mg2+ or Ca2+ required for activity Bos taurus

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
ADP + H2O Bos taurus
-
AMP + phosphate
-
?
ATP + 2 H2O Bos taurus
-
AMP + 2 phosphate
-
?

Organism

Organism UniProt Comment Textmining
Bos taurus
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
aorta smooth muscle cells Bos taurus
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
ADP + H2O
-
Bos taurus AMP + phosphate
-
?
ADP + H2O maximum activity at 7 mM Bos taurus AMP + phosphate
-
?
ADP + H2O about 90% relative activity of ATP Bos taurus AMP + phosphate
-
?
ATP + 2 H2O
-
Bos taurus AMP + 2 phosphate
-
?
ATP + 2 H2O maximum activity at 8 mM Bos taurus AMP + 2 phosphate
-
?
GTP + 2 H2O comparative hydrolysis to ATP Bos taurus GMP + 2 phosphate
-
?
IDP + H2O comparative hydrolysis to ADP Bos taurus IMP + phosphate
-
?
ITP + 2 H2O comparative hydrolysis to ATP Bos taurus IMP + 2 phosphate
-
?
additional information neglible hydrolysis of AMP Bos taurus ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5
-
-
Bos taurus