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Literature summary for 3.2.1.20 extracted from

  • Matsui, H.; Yazawa, I.; Chiba, S.
    Purification and substrate specificity of sweet corn alpha-glucosidase (1981), Agric. Biol. Chem., 45, 887-894.
No PubMed abstract available
Search for more literature for 3.2.1.20

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.2
-
 turanose
-
 Zea mays
0.4
-
 kojibiose
-
 Zea mays
1.1
-
 Phenyl alpha-maltoside
-
 Zea mays
1.2
-
 maltotriose
-
 Zea mays
1.4
-
 nigerose
-
 Zea mays
1.5
-
 maltose
-
 Zea mays
1.9
-
 maltotetraose
-
 Zea mays
2.4
-
 maltopentaose
-
 Zea mays
3.4
-
 maltohexaose
-
 Zea mays
3.8
-
 maltoheptaose
-
 Zea mays
4.2
-
 Phenyl alpha-maltoside
-
 Zea mays
4.3
-
 maltooctaose
-
 Zea mays
5
-
 panose
-
 Zea mays
5.2
-
 amylose DP = 13 Zea mays
14
-
 isomaltose
-
 Zea mays

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
96000
-
 x * 96000, SDS-PAGE Zea mays

Organism

Organism UniProt Comment Textmining
Zea mays
-
 L. var. saccharata
-

Purification (Commentary)

Purification (Comment) Organism
-
 Zea mays

Source Tissue

Source Tissue Comment Organism Textmining
seed
-
 Zea mays
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
54.3
-
-
 Zea mays

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
amylose + H2O
-
 Zea mays beta-maltose + ?
-
 ?
isomaltose + H2O
-
 Zea mays 2 alpha-D-glucose
-
 ?
kojibiose + H2O
-
 Zea mays alpha-D-glucose + D-glucose
-
 ?
maltoheptaose + H2O
-
 Zea mays beta-maltose + maltopentaose
-
 ?
maltohexaose + H2O
-
 Zea mays beta-maltose + maltotetraose
-
 ?
maltooctaose + H2O
-
 Zea mays alpha-D-glucose
-
 ?
maltopentaose + H2O
-
 Zea mays beta-maltose + maltotriose
-
 ?
maltose + H2O
-
 Zea mays alpha-D-glucose + D-glucose
-
 ?
maltotetraose + H2O
-
 Zea mays ?
-
 ?
maltotriose + H2O
-
 Zea mays D-glucose + maltose
-
 ?
nigerose + H2O
-
 Zea mays 2 alpha-D-glucose
-
 ?
panose + H2O
-
 Zea mays maltose + alpha-D-glucose
-
 ?
phenyl alpha-D-glucoside + H2O
-
 Zea mays phenol + alpha-D-glucose
-
 ?
phenyl alpha-maltoside + H2O
-
 Zea mays alpha-D-glucose + phenyl alpha-D-glucoside
-
 ?
starch + H2O
-
 Zea mays alpha-D-glucose
-
 ?
turanose + H2O
-
 Zea mays alpha-D-glucose + D-fructose
-
 ?

Subunits

Subunits Comment Organism
? x * 96000, SDS-PAGE Zea mays

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
3.6
-
 hydrolysis of maltose and soluble starch Zea mays

pH Range

pH Minimum pH Maximum Comment Organism
2.3 5.5 pH 2.3: about 65% of maximal maltase activity, about 20% of maximal glucoamylase activity, pH 5.5: about 35% of maximal maltase activity, about 45% of maximal glucoamylase activity Zea mays