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Literature summary extracted from

  • Suzuki, Y.; Uchida, K.
    Three forms of alpha-glucosidase from welsh onion (Allium fistulosum L.) (1984), Agric. Biol. Chem., 48, 1343-1345.
No PubMed abstract available

Inhibitors

EC Number Inhibitors Comment Organism Structure
3.2.1.20 Ag+
-
 Allium fistulosum
3.2.1.20 Hg2+
-
 Allium fistulosum
3.2.1.20 Sn2+
-
 Allium fistulosum
3.2.1.20 Tris
-
 Allium fistulosum

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
3.2.1.20 40000
-
 x * 40000, alpha-glucosidase I, SDS-PAGE Allium fistulosum
3.2.1.20 41000
-
 x * 41000, alpha-glucosidase II, SDS-PAGE Allium fistulosum
3.2.1.20 49000
-
 x * 49000, alpha-glucosidase III, SDS-PAGE Allium fistulosum

Organism

EC Number Organism UniProt Comment Textmining
3.2.1.20 Allium fistulosum
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
3.2.1.20 alpha-glucosidase I, II and III Allium fistulosum

Source Tissue

EC Number Source Tissue Comment Organism Textmining
3.2.1.20 leaf
-
 Allium fistulosum
-

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
-
-
 Allium fistulosum

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
3.2.1.20 amylose + H2O
-
 Allium fistulosum alpha-D-glucose
-
 ?
3.2.1.20 isomaltose + H2O high activity with alpha-glucosidase III, very low activity with alpha-glucosidase I and II Allium fistulosum 2 alpha-D-glucose
-
 ?
3.2.1.20 kojibiose + H2O
-
 Allium fistulosum alpha-D-glucose + D-glucose
-
 ?
3.2.1.20 maltose + H2O
-
 Allium fistulosum alpha-D-glucose + D-glucose
-
 ?
3.2.1.20 maltotriose + H2O
-
 Allium fistulosum maltose + D-glucose
-
 ?
3.2.1.20 starch + H2O weak activity Allium fistulosum alpha-D-glucose
-
 ?
3.2.1.20 starch + H2O soluble Allium fistulosum alpha-D-glucose
-
 ?

Subunits

EC Number Subunits Comment Organism
3.2.1.20 ? x * 41000, alpha-glucosidase II, SDS-PAGE Allium fistulosum
3.2.1.20 ? x * 49000, alpha-glucosidase III, SDS-PAGE Allium fistulosum
3.2.1.20 ? x * 40000, alpha-glucosidase I, SDS-PAGE Allium fistulosum

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
3.2.1.20 50
-
 alpha-glucosidase III Allium fistulosum
3.2.1.20 55
-
 alpha-glucosidase I and II Allium fistulosum

Temperature Stability [°C]

EC Number Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
3.2.1.20 45
-
 pH 5.0, 15 min, stable up to Allium fistulosum

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
3.2.1.20 5
-
-
 Allium fistulosum

pH Stability

EC Number pH Stability pH Stability Maximum Comment Organism
3.2.1.20 3.5 8 30°C, 19 h, stable, alpha-glucoamylase II and III Allium fistulosum
3.2.1.20 3.5 7 30°C, 19 h, stable, alpha-glucoamylase I Allium fistulosum