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Literature summary extracted from

  • Takahashi, N.; Shimomura, T.; Chiba, S.
    Studies on alpha-glucosidase in rice. Part I. Isolation and some properties of alpha-glucosidase I and alpha-glucosidase II (1971), Agric. Biol. Chem., 35, 2015-2024.
No PubMed abstract available

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.2.1.20 erythritol
-
Oryza sativa
3.2.1.20 Tris
-
Oryza sativa

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
3.2.1.20 1.1
-
maltose alpha-glucosidase I Oryza sativa
3.2.1.20 2
-
maltose alpha-glucosidase II Oryza sativa

Organism

EC Number Organism UniProt Comment Textmining
3.2.1.20 Oryza sativa
-
L. cv. Shinsetsu
-
3.2.1.20 Oryza sativa
-
glucosidase I and II
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.2.1.20
-
Oryza sativa

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.2.1.20 seed
-
Oryza sativa
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
3.2.1.20 additional information
-
-
Oryza sativa

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.1.20 kojibiose + H2O
-
Oryza sativa alpha-D-glucose + D-glucose
-
?
3.2.1.20 maltose + H2O
-
Oryza sativa alpha-D-glucose + D-glucose
-
?
3.2.1.20 maltotetraose + H2O
-
Oryza sativa alpha-D-glucose
-
?
3.2.1.20 maltotriose + H2O
-
Oryza sativa maltose + D-glucose
-
?
3.2.1.20 nigerose + H2O
-
Oryza sativa 2 alpha-D-glucose
-
?
3.2.1.20 starch + H2O
-
Oryza sativa alpha-D-glucose
-
?

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
3.2.1.20 50
-
hydrolysis of soluble starch Oryza sativa
3.2.1.20 55
-
hydrolysis of maltose Oryza sativa

Temperature Range [°C]

EC Number Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
3.2.1.20 20 70 20°C: about 35% of maximal activity of alpha-glucosidase I with starch as substrate, about 20% of maximal activity of alpha-glucosidase II with maltose as substrate, about 20% of maximal activity of alpha-glucosidase II with maltose as substrate, about 45% of maximal activity of alpha-glucosidase II with starch as substrate, 70°C: about 20% of maximal activity of alpha-glucosidase I with starch as substrate, about 20% of maximal activity of alpha-glucosidase II with maltose as substrate, about 15% of maximal activity of alpha-glucosidase II with maltose as substrate, about 30% of maximal activity of alpha-glucosidase II with starch as substrate Oryza sativa

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.2.1.20 3.7 4 alpha-glucosidase II Oryza sativa
3.2.1.20 4 4.3 alpha-glucosidase I Oryza sativa

pH Range

EC Number pH Minimum pH Maximum Comment Organism
3.2.1.20 3 6 pH 3.0: about 40% of maximal activity of alpha-glucosidase I, about 65% of maximal activity of alpha-glucosidase II, pH 6.0: about 45% of maximal activity of alpha-glucosidase I, about 50% of maximal activity of glucosidase II Oryza sativa