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Literature summary extracted from

  • Janczarek, M.; Skorupska, A.
    The Rhizobium leguminosarum bv. trifolii pssB gene product is an inositol monophosphatase that influences exopolysaccharide synthesis (2001), Arch. Microbiol., 175, 143-151.
    View publication on PubMed

Cloned(Commentary)

EC Number Cloned (Comment) Organism
3.1.3.25 expressed in Escherichia coli M15 Rhizobium leguminosarum

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.1.3.25 Li+
-
Rhizobium leguminosarum

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.1.3.25 0.23
-
myo-inositol 1-phosphate pH 7.8, 30°C Rhizobium leguminosarum

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
3.1.3.25 Ca2+ no activity at 3 mM Rhizobium leguminosarum
3.1.3.25 Co2+ partial activation of enzyme, 16.8% of the activity observed with Mg2+ Rhizobium leguminosarum
3.1.3.25 Mg2+ required, highest activity with 3 mM Mg2+, inhibitory at high concentrations, 50% inhibition at 100 mM Rhizobium leguminosarum
3.1.3.25 Mn2+ partial activation of enzyme, 22.7% of the activity observed with Mg2+ Rhizobium leguminosarum
3.1.3.25 Zn2+ partial activation of enzyme, 8.2% of the activity observed with Mg2+ Rhizobium leguminosarum

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
3.1.3.25 30350
-
calculated mass of the Escherichia coli expressed protein Rhizobium leguminosarum

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
3.1.3.25 myo-inositol 1-phosphate + H2O Rhizobium leguminosarum reguglation of exopolysaccharide synthesis suggested myo-inositol + phosphate
-
?

Organism

EC Number Organism UniProt Comment Textmining
3.1.3.25 Rhizobium leguminosarum
-
bv. trifolii
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.1.3.25 recombinant protein from Escherichia coli using His-tag Rhizobium leguminosarum

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.1.3.25 2'-AMP + H2O 18% of the rate with inositol 1-phosphate Rhizobium leguminosarum adenosine + phosphate
-
?
3.1.3.25 glycerol 2-phosphate + H2O 64% of the rate with inositol 1-phosphate Rhizobium leguminosarum glycerol + phosphate
-
?
3.1.3.25 additional information traces of activity with glucose 1-phosphate and 4-nitrophenylphosphate, no activity with glucose 6-phosphate and 5'-AMP Rhizobium leguminosarum ?
-
?
3.1.3.25 myo-inositol 1-phosphate + H2O
-
Rhizobium leguminosarum myo-inositol + phosphate
-
?
3.1.3.25 myo-inositol 1-phosphate + H2O reguglation of exopolysaccharide synthesis suggested Rhizobium leguminosarum myo-inositol + phosphate
-
?
3.1.3.25 myo-inositol 4-phosphate + H2O
-
Rhizobium leguminosarum myo-inositol + phosphate
-
?

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.1.3.25 7.8
-
-
Rhizobium leguminosarum

Ki Value [mM]

EC Number Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
3.1.3.25 4.35
-
Li+ pH 7.8, 30°C Rhizobium leguminosarum