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Literature summary for 3.2.1.2 extracted from

  • Heinz, V.; Buckow, R.; Knorr, D.
    Catalytic activity of beta-amylase from barley in different pressure/temperature domains (2005), Biotechnol. Prog., 21, 1632-1638.
    View publication on PubMed

Application

Application Comment Organism
industry the enzyme is important in industrial maltose production Hordeum vulgare
nutrition the enzyme is important in maltose production, and in fermentation processes of food and alcoholic beverages Hordeum vulgare

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information kinetics Hordeum vulgare

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
starch + H2O Hordeum vulgare
-
maltose + ?
-
?

Organism

Organism UniProt Comment Textmining
Hordeum vulgare
-
-
-

Reaction

Reaction Comment Organism Reaction ID
(alpha-D-glucopyranosyl-(1-4))n-alpha-D-glucopyranose + H2O = (alpha-D-glucopyranosyl-(1-4))n-2-alpha-D-glucopyranose + alpha-D-glucopyranosyl-(1-4)-beta-D-glucopyranose catalytic mechanism Hordeum vulgare

Source Tissue

Source Tissue Comment Organism Textmining
commercial preparation
-
Hordeum vulgare
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
catalytic activity of the enzyme at different pressure/temperature conditions, up to 700 mPa, 20-70°C, overview Hordeum vulgare

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information starch gelatinization assay, overview Hordeum vulgare ?
-
?
starch + H2O
-
Hordeum vulgare maltose + ?
-
?
starch + H2O soluble starch, depolymerization, reaction scheme Hordeum vulgare maltose + ?
-
?

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
55
-
approximately Hordeum vulgare

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
20 70 at different pressure/temperature conditions, up to 700 mPa, overview Hordeum vulgare

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
additional information
-
thermal inactivation kinetics of the enzyme at different pressure/temperature conditions, mechanism, overview Hordeum vulgare

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5.6
-
-
Hordeum vulgare