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Literature summary for 3.2.1.20 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

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

Molecular Weight [Da]

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

Organism

Organism UniProt Comment Textmining
Allium fistulosum
-
-
-

Purification (Commentary)

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

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Allium fistulosum
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
-
Allium fistulosum

Substrates and Products (Substrate)

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

Subunits

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

Temperature Optimum [°C]

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

Temperature Stability [°C]

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

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5
-
-
Allium fistulosum

pH Stability

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