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Literature summary for 3.2.1.1 extracted from

  • Nirmala, M.; Muralikrishna, G.
    Three alpha-amylases from malted finger millet (Ragi, Eleusine coracana, Indaf-15) - purification and partial characterization (2003), Phytochemistry, 62, 21-30.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
CaCl2 5 mm, 15% increase in activity Eleusine coracana
CaCl2 5 mm, 25% increase in activity Eleusine coracana
CaCl2 5 mm, 8% increase in activity Eleusine coracana

Inhibitors

Inhibitors Comment Organism Structure
AlCl3 5 mM, complete inhibition Eleusine coracana
CdCl2 5 mM, 14% inhibition; 5 mM, 38% inhibition; 5 mM, 43% inhibition Eleusine coracana
CuCl2 5 mM, 88% inhibition; 5 mM, 89% inhibition; 5 mM, 94% inhibition Eleusine coracana
FeCl2 5 mM, complete inhibition Eleusine coracana
HgCl2 5 mM, complete inhibition Eleusine coracana
ZnCl2 5 mM, 70% inhibition; 5 mM, 74% inhibition; 5 mM, 80% inhibition Eleusine coracana

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
starch 0.53%, ragi starch, 45°C, pH 5.0 Eleusine coracana
additional information
-
starch 0.59%, ragi starch, 45°C, pH 5.0 Eleusine coracana
additional information
-
starch 1.1%, ragi starch, 45°C, pH 5.0 Eleusine coracana

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
22000
-
gel filtration Eleusine coracana
26000
-
gel filtration Eleusine coracana
47000
-
x * 47000, SDS-PAGE Eleusine coracana

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
starch + H2O Eleusine coracana
-
fragments of starch
-
?

Organism

Organism UniProt Comment Textmining
Eleusine coracana
-
finger millet or ragi
-

Purification (Commentary)

Purification (Comment) Organism
acetone, DEAE-Sephacel, Sephacryl S-200 Eleusine coracana

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
975
-
-
Eleusine coracana
1500
-
-
Eleusine coracana
1773
-
-
Eleusine coracana

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
starch + H2O
-
Eleusine coracana fragments of starch
-
?

Subunits

Subunits Comment Organism
? x * 47000, SDS-PAGE Eleusine coracana

Synonyms

Synonyms Comment Organism
alpha-amylase 1
-
Eleusine coracana
alpha-amylase 2
-
Eleusine coracana
alpha-amylase 3
-
Eleusine coracana

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
45
-
-
Eleusine coracana
50
-
-
Eleusine coracana

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5
-
-
Eleusine coracana
5
-
drastic decrease in activity at pH 4.0 Eleusine coracana
5.5
-
drastic decrease in activity at pH 4.0 Eleusine coracana

pH Range

pH Minimum pH Maximum Comment Organism
4 5 drastic decrease in activity at pH 4.0 Eleusine coracana