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Literature summary extracted from

  • Hiraishi, H.; Ohmagari, T.; Otsuka, Y.; Yokoi, F.; Kumon, A.
    Purification and characterization of hepatic inorganic pyrophosphatase hydrolysing imidodiphosphate (1997), Arch. Biochem. Biophys., 341, 153-159.
    View publication on PubMed

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.6.1.1 diphosphate hydrolysis of imidophosphate competitively inhibited in the absence of divalent cations Bos taurus
3.6.1.1 p-chloromercuriphenyl sulfonate 50% inhibition of hydrolysis of diphosphate at 25 µM Bos taurus

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.6.1.1 0.12
-
Imidodiphosphate
-
Bos taurus
3.6.1.1 0.14
-
diphosphate
-
Bos taurus

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
3.6.1.1 cytosol
-
Bos taurus 5829
-

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
3.6.1.1 Co2+ increases hydrolysis of imidophosphate Bos taurus
3.6.1.1 Mg2+ increases hydrolysis of imidophosphate Bos taurus
3.6.1.1 Mg2+ or other divalent cation required for hydrolysis of diphosphate Bos taurus
3.6.1.1 Mn2+ increases hydrolysis of imidophosphate Bos taurus

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
3.6.1.1 33000
-
2 * 33000, SDS-PAGE Bos taurus
3.6.1.1 56000
-
ultracentrifuge method Bos taurus

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
3.6.1.1 diphosphate + H2O Bos taurus
-
2 phosphate
-
?

Organism

EC Number Organism UniProt Comment Textmining
3.6.1.1 Bos taurus
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.6.1.1
-
Bos taurus

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.6.1.1 liver
-
Bos taurus
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
3.6.1.1 2.1
-
diphosphate Bos taurus

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.6.1.1 diphosphate + H2O
-
Bos taurus 2 phosphate
-
?
3.6.1.1 imidodiphosphate + 2 H2O hydrolysis even in the absence of divalent cations Bos taurus 2 phosphate + NH3
-
ir

Subunits

EC Number Subunits Comment Organism
3.6.1.1 dimer 2 * 33000, SDS-PAGE Bos taurus

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
3.6.1.1 30
-
-
Bos taurus

Temperature Range [°C]

EC Number Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
3.6.1.1 30 65
-
Bos taurus

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
3.6.1.1 70
-
no activity Bos taurus

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.6.1.1 6 7
-
Bos taurus

Ki Value [mM]

EC Number Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
3.6.1.1 0.025
-
p-chloromercuriphenyl sulfonate
-
Bos taurus