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Literature summary extracted from

  • Takasaki, Y.
    Production of maltohexaose by alpha-amylase from Bacillus circulans G-6 (1982), Agric. Biol. Chem., 46, 1539-1547.
No PubMed abstract available

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.2.1.1 Co2+
-
Niallia circulans
3.2.1.1 Cu2+
-
Niallia circulans
3.2.1.1 Fe2+
-
Niallia circulans
3.2.1.1 Hg2+
-
Niallia circulans
3.2.1.1 Zn2+
-
Niallia circulans
3.2.1.98 AgNO3 G-6 Niallia circulans
3.2.1.98 BaCl2 G-6, slight inactivation Niallia circulans
3.2.1.98 CaCl2 G-6 Niallia circulans
3.2.1.98 Co2+ G-6, strong inhibition Niallia circulans
3.2.1.98 CoCl2 G-6, strong inhibition Niallia circulans
3.2.1.98 Cu2+ G-6, strong inhibition Niallia circulans
3.2.1.98 CuSO4 G-6, strong inhibition Niallia circulans
3.2.1.98 Fe2+ G-6, strong inhibition Niallia circulans
3.2.1.98 FeSO4 G-6, strong inhibition Niallia circulans
3.2.1.98 Hg2+ G-6, very strong inhibition Niallia circulans
3.2.1.98 HgCl2 G-6, very strong inhibition Niallia circulans
3.2.1.98 MnCl2 G-6, slight inactivation Niallia circulans
3.2.1.98 NiCl2 G-6 Niallia circulans
3.2.1.98 SrCl2 G-6 Niallia circulans
3.2.1.98 Zn2+ G-6, strong inhibition Niallia circulans
3.2.1.98 ZnSO4 G-6, strong inhibition Niallia circulans

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.2.1.98 additional information
-
additional information
-
Niallia circulans

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
3.2.1.98 extracellular
-
Niallia circulans
-
-

Metals/Ions

EC Number Metals/Ions Comment Organism Structure
3.2.1.98 MgSO4 G-6, slight activation Niallia circulans

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
3.2.1.1 76000
-
gel filtration Niallia circulans
3.2.1.98 76000
-
G-6, gel filtration Niallia circulans

Organism

EC Number Organism UniProt Comment Textmining
3.2.1.1 Niallia circulans
-
-
-
3.2.1.1 Niallia circulans G-6
-
-
-
3.2.1.98 Niallia circulans
-
G-6
-
3.2.1.98 Niallia circulans G-6
-
G-6
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.2.1.1
-
Niallia circulans
3.2.1.98 G-6 Niallia circulans

Reaction

EC Number Reaction Comment Organism Reaction ID
3.2.1.98 (Glcalpha(1-4))m + H2O = (Glcalpha(1-4))m-6 + maltohexaose alpha-amylase, product is linear oligosaccharide containing alpha-1,4-glucosidic linkages Niallia circulans

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.2.1.98 culture filtrate
-
Niallia circulans
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
3.2.1.1 additional information
-
-
Niallia circulans
3.2.1.98 additional information
-
G-6 Niallia circulans

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.1.1 starch + H2O
-
Niallia circulans additional information maltohexaose is the main product ?
3.2.1.98 maltohexaose + H2O poor substrate Niallia circulans maltose + maltotetraose main product ?
3.2.1.98 additional information products have alpha-configuration Niallia circulans ?
-
?
3.2.1.98 additional information G-6, alpha-1,6-glucosidic linkages in pullulan, amylopectin etc.: not a substrate Niallia circulans ?
-
?
3.2.1.98 additional information G-6, action pattern Niallia circulans ?
-
?
3.2.1.98 additional information products have alpha-configuration Niallia circulans G-6 ?
-
?
3.2.1.98 additional information G-6, alpha-1,6-glucosidic linkages in pullulan, amylopectin etc.: not a substrate Niallia circulans G-6 ?
-
?
3.2.1.98 additional information G-6, action pattern Niallia circulans G-6 ?
-
?
3.2.1.98 starch + H2O soluble starch Niallia circulans maltohexaose + ? main product ?
3.2.1.98 starch + H2O soluble starch Niallia circulans maltohexaose + ? G-6, about 30-34% maltohexaose ?
3.2.1.98 starch + H2O soluble starch Niallia circulans G-6 maltohexaose + ? main product ?
3.2.1.98 starch + H2O soluble starch Niallia circulans G-6 maltohexaose + ? G-6, about 30-34% maltohexaose ?

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
3.2.1.1 60
-
-
Niallia circulans
3.2.1.98 60
-
G-6 Niallia circulans

Temperature Range [°C]

EC Number Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
3.2.1.1 30 65 30°C: about 45% of maximal activity, 65°C: about 10% of maximal activity Niallia circulans

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
3.2.1.1 50
-
pH 8.0, 10 min, stable below Niallia circulans
3.2.1.98 50
-
G-6, stable below, Ca2+ not very effective for protecting the enzyme from heat Niallia circulans

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.2.1.1 8
-
-
Niallia circulans
3.2.1.98 8
-
G-6 Niallia circulans

pH Range

EC Number pH Minimum pH Maximum Comment Organism
3.2.1.1 5 9.5 pH 5.0: about 40% of maximal activity, pH 9.5: about 70% of maximal activity Niallia circulans
3.2.1.98 5 10 G-6, about 40% of activity at pH 5.0 and 10.0 Niallia circulans

pH Stability

EC Number pH Stability pH Stability Maximum Comment Organism
3.2.1.1 5 10 30°C, 3 h, stable Niallia circulans
3.2.1.98 5 10 G-6, stable between Niallia circulans