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3.2.1.2: beta-amylase

This is an abbreviated version!
For detailed information about beta-amylase, go to the full flat file.

Word Map on EC 3.2.1.2

Reaction

(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

Synonyms

(1-4)-alpha-D-glucan maltohydrolase, 1,4-alpha-D-glucan malto-hydrolase, 1,4-alpha-D-glucan maltohydrolase, 1-4-alpha-glucan maltohydrolase, alpha-1,4-glucan maltohydrolase, amylase, beta-, ARATH, BAM-1, BAM-2, BAM-3, BAM-5, BAM-6, BAM-7, BAM-8, BAM-9, BAM1, BAM3, BAM4, BCB, beta amylase, beta-amylase, beta-amylase 1, beta-amylase I, beta-amylase1, beta-amylase2, beta-amylase8, BMY, Bmy1, Bmy2, Cs-COR018, CT-BMY, glycogenase, More, PF0870, saccharogen amylase, saccharogenamylase, SBA, Sd1, Sd2H, Sd2L, spoII, TCMA, TR-BAMY, type I beta-amylase, type II beta-amylase

ECTree

     3 Hydrolases
         3.2 Glycosylases
             3.2.1 Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
                3.2.1.2 beta-amylase

pH Range

pH Range on EC 3.2.1.2 - beta-amylase

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pH RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
2 - 8
-
pH 2.0: about 35% of maximal activity, pH 8.0: about 30% of maximal activity
3 - 7
active in the range
3 - 7.2
-
50% of maximal activity at pH 3.0 and pH 7.2, degradation of glycogen
3 - 7.5
Dioscorea batatus
-
no activity below pH 3.0 and above pH 7.5
3 - 8
3 - 8.5
-
pH 3.0: about 30% of maximal activity, pH 8.5: about 40% of maximal activity
3 - 9
4 - 12
-
activity range
4 - 6
pH 4.0: about 85% of maximal activity, pH 6.0: about 60% of maximal activity, alpha-1,4-glycosidic linkage hydrolysis of maltotriose
4 - 6.5
-
active in the range
4 - 7
Dioscorea batatus
-
pH 4.0: about 25% of maximal activity, pH 7.0: about 50% of maximal activity
4 - 8
4.5 - 8.5
-
pH 4.5: about 40% of maximal activity, pH 8.5: about 60% of maximal activity
5 - 6
-
more than 80% of maximal activity at pH 5.0 and at pH 6.0
5 - 7
-
high activity range
5 - 7.5
free enzyme, over 50% of maximal activity within this range
5 - 8
-
pH 5.0: about 55% of maximal activity, pH 8.0: about 60% of maximal activity
5.5 - 10
-
pH 5.5.: about 50% of maximal activity, pH 10.0: about 40% of maximal activity
6 - 9
-
about 75% of maximal activity at pH 6.0 and pH 9.0