3.6.1.28: thiamine-triphosphatase
This is an abbreviated version!
For detailed information about thiamine-triphosphatase, go to the full flat file.
Word Map on EC 3.6.1.28
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3.6.1.28
-
adenylyl
-
electricus
-
electrophorus
-
phosphohydrolases
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hydrophila
-
tdp
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nitrosomonas
-
diphosphatase
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triphosphorylated
- 3.6.1.28
-
adenylyl
- electricus
- electrophorus
-
phosphohydrolases
- hydrophila
- tdp
- nitrosomonas
- diphosphatase
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triphosphorylated
Reaction
Synonyms
25 kDa thiamine triphosphatase, 25-kDa thiamine triphosphatase, phosphatase, thiamine tri-, thiamine triphosphatase, Thtpa, ThTPase, TTPase
ECTree
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Metals Ions
Metals Ions on EC 3.6.1.28 - thiamine-triphosphatase
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Br-
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stimulation by anions with the following order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme
Ca2+
Cl-
-
stimulation by anions with the following decreasing order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme
I-
-
stimulation by anions with the following decreasing order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme
Mg2+
Mn2+
NO3-
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stimulation by anions with the following decreasing order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme. The effect of NO3- is maximal at pH 7-8, it is negligible at pH 6.5
SCN-
-
stimulation by anions with the following decreasing order of effectiveness: SCN-, I-, NO3-, Br-, Cl-, membrane-associated enzyme
Zn2+
Ca2+
-
the addition of Ca2+ at 5 mM concentration enhances the rate of thiamine triphosphate hydrolysis by a factor of 17-20
Ca2+
-
divalent cation requirement is fullfilled by Mg2+ or Ca2+ in microsomes and by Mg2+ but not Ca2+ in soluble fraction
Ca2+
-
divalent cation requirement is satisfied by Mg2+, Mn2+ or Ca2+
Mg2+
-
soluble enzyme requires Mg2+, enzyme from membrane is Mg2+-independent
Mg2+
-
the addition of Mg2+ at 5 mM concentration enhances the rate of thiamine triphosphate hydrolysis by a factor of 17-20
Mg2+
the enzyme has an absolute requirement for divalent cations, binding of Mg2+ induces only a minor local conformational change
Mg2+
-
divalent cation requirement is fullfilled by Mg2+ or Ca2+ in microsomes and by Mg2+ but not Ca2+ in soluble fraction
Mg2+
-
maximal activation occurs at a cation to substrate ratio of 1:1
Mg2+
-
divalent cation requirement is satisfied by Mg2+, Mn2+ or Ca2+
Mn2+
-
divalent cation requirement is satisfied by Mg2+, Mn2+ or Ca2+
Zn2+
-
0.01-0.05 mM at pH 8.0 activates GST-tagged thiamine triphosphatase by about 30% in the presence of Mg2+