Ligand starch

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Basic Ligand Information

Molecular Structure
Picture of starch (click for magnification)
Molecular Formula
BRENDA Name
InChIKey
C24H40O21R2
starch
WFPUBEDBBOGGIQ-UHFFFAOYSA-N
Synonyms:
(1,4-alpha-D-glucosyl)n+1, (1,4-alpha-glucosyl)n+1, (alpha-D-glucopyranosyl-(1-4))n-alpha-D-glucopyranose, linear maltodextrin, [(1,4)-alpha-D-glucosyl]n+1, [(1-4)-alpha-D-glucosyl]n+1, [(1->4)-alpha-D-glucosyl]n+1


Show all pahtways known for Show all BRENDA pathways known for starch

Roles as Enzyme Ligand

In Vivo Substrate in Enzyme-catalyzed Reactions (49 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
starch + AH2 + O2 = aldonic acid-terminated malto-oligosaccharides + A + H2O
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starch = starch containing alpha-1,6-glucosidic linkages
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starch = ?
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starch + H2O = beta-D-glucose + ?
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starch + H2O = ?
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starch + H2O = maltotetraose + ?
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starch + H2O = ?
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starch + H2O = maltose + D-glucose
show the reaction diagram
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starch = ?
show the reaction diagram
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In Vivo Product in Enzyme-catalyzed Reactions (17 results)

EC NUMBER
PROVEN IN VIVO REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
starch + H2O = starch + beta-D-glucose
show the reaction diagram
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cyclomaltodextrin + H2O = linear maltodextrin
show the reaction diagram
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Substrate in Enzyme-catalyzed Reactions (187 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
UDP-glucose + starch = starch + UDP
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starch = glucose
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sucrose + starch = D-fructose + ?
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starch + H2O = ?
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starch + H2O = maltose + ?
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starch + H2O = ?
show the reaction diagram
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starch + H2O = beta-D-glucose + ?
show the reaction diagram
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starch + H2O = ?
show the reaction diagram
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starch + H2O = ?
show the reaction diagram
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starch + H2O = ?
show the reaction diagram
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starch + H2O = ?
show the reaction diagram
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starch + H2O = ?
show the reaction diagram
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starch + H2O = ?
show the reaction diagram
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starch + H2O = maltose + D-glucose
show the reaction diagram
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starch = ?
show the reaction diagram
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Product in Enzyme-catalyzed Reactions (30 results)

EC NUMBER
REACTION
REACTION DIAGRAM
LITERATURE
ENZYME 3D STRUCTURE
starch + H2O = starch + beta-D-glucose
show the reaction diagram
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cyclomaltodextrin + H2O = linear maltodextrin
show the reaction diagram
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Activator in Enzyme-catalyzed Reactions (3 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
favores CGTase synthesis
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activates recombinant enzyme
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increasing Vmax, 160% activation at 7 mg/ml
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Inhibitor in Enzyme-catalyzed Reactions (8 results)

EC NUMBER
COMMENTARY
LITERATURE
ENZYME 3D STRUCTURE
enzyme activity decreases to half of its original activity at 10 mg/ml of starch. The thiol groups of alcohol dehydrogenase are involved in binding
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concentrations above 32 g/l
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at high concentration s
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non-competitively inhibits hydrolysis of maltose
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0.2% soluble starch
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inhibits hydrolysis of glucan
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Enzyme Kinetic Parameters

kcat Value (Turnover Number) (118 results)

EC NUMBER
TURNOVER NUMBER [1/S]
TURNOVER NUMBER MAXIMUM [1/S]
COMMENTARY
LITERATURE
1.67
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pH 3.5, 95°C

KM Value (145 results)

EC NUMBER
KM VALUE [MM]
KM VALUE MAXIMUM [MM]
COMMENTARY
LITERATURE
25
-
pH 9, 50°C, soluble, Km-value shown as glucose equivalents
-999
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KM value 0.065 mg/ml, pH 7.0, 25°C
-999
-
Km-value: 7.29 mg/ml, pH 3.5, 95°C

References & Links

Links to other databases for starch

ChEBI
PubChem
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PubChem