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Literature summary for 3.6.1.5 extracted from

  • Massalski, C.; Bloch, J.; Zebisch, M.; Steinebrunner, I.
    The biochemical properties of the Arabidopsis ecto-nucleoside triphosphate diphosphohydrolase AtAPY1 contradict a direct role in purinergic signaling (2015), PLoS ONE, 10, e0115832.
    View publication on PubMedView publication on EuropePMC

Cloned(Commentary)

Cloned (Comment) Organism
expression of the full-length protein and a soluble form without the transmembrane domain near the N-terminus in HEK-293 cells Arabidopsis thaliana

Inhibitors

Inhibitors Comment Organism Structure
azide 10 mM, 42% inhibition Arabidopsis thaliana
Cu2+ 1 mM, about 3fold inhibition Arabidopsis thaliana
fluoride 10 mM, 27% inhibition Arabidopsis thaliana
vanadate 1 mM, 54% inhibition Arabidopsis thaliana

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0597
-
GDP pH 6.5, 25°C Arabidopsis thaliana
0.0744
-
UDP pH 6.5, 25°C Arabidopsis thaliana
0.166
-
IDP pH 6.5, 25°C Arabidopsis thaliana

Localization

Localization Comment Organism GeneOntology No. Textmining
membrane
-
Arabidopsis thaliana 16020
-

Metals/Ions

Metals/Ions Comment Organism Structure
Ca2+ 1 mM, about 3fold stimulation. Ca2+ and Mn2+ are best activators Arabidopsis thaliana
Mg2+ 1 mM, 2.5fold stimulation Arabidopsis thaliana
Mn2+ 1 mM, about 3fold stimulation. Ca2+ and Mn2+ are best activators Arabidopsis thaliana

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
52000
-
x * 52000, recombinant protein with His-tag, SDS-PAGE Arabidopsis thaliana

Organism

Organism UniProt Comment Textmining
Arabidopsis thaliana Q9SQG2
-
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
21.7
-
recombinant protein lacking transmembrane domain, pH 6.5, 25°C Arabidopsis thaliana

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
GDP + H2O
-
Arabidopsis thaliana GMP + phosphate
-
?
IDP + H2O
-
Arabidopsis thaliana IMP + phosphate
-
?
additional information no substrate: ADP Arabidopsis thaliana ?
-
?
UDP + H2O
-
Arabidopsis thaliana UMP + phosphate
-
?

Subunits

Subunits Comment Organism
? x * 52000, recombinant protein with His-tag, SDS-PAGE Arabidopsis thaliana

Synonyms

Synonyms Comment Organism
APY1
-
Arabidopsis thaliana

pH Range

pH Minimum pH Maximum Comment Organism
5.5 9.5 broad Arabidopsis thaliana