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3.2.1.99: arabinan endo-1,5-alpha-L-arabinanase

This is an abbreviated version!
For detailed information about arabinan endo-1,5-alpha-L-arabinanase, go to the full flat file.

Word Map on EC 3.2.1.99

Reaction

alpha-L-Ara-(1-5)-O-alpha-L-Ara-(1-5)-O-alpha-L-Ara-(1-5)-O-alpha-L-Ara-(1-5)-O-alpha-L-Ara
+
H2O
=
alpha-L-Ara-(1-5)-O-alpha-L-Ara-(1-5)-O-alpha-L-Ara
 +
alpha-L-arabinofuranosyl-(1-5)-O-alpha-L-arabinofuranose

Synonyms

1,5-alpha-arabinanase A, ABN, ABN A, ABN-TS, Abn1, Abn2, ABNA, abnA1, abnA2, ABNase, Abnc, AbnS1, AbnZ1, alpha-1,5-L-endo-arabinanase, alpha-L-arabinohydrolase, ARA, ARA1, araban 5-alpha-L-arabinohydrolase, arabinanase A, arabinase, endo-1,5-alpha-L-, arase, Arb43A, Arb43B, arbA, BlAbn1, CEDAase, cold-adapted endo-arabinanase, endo-(1,5)-alpha-L-arabinanase, endo-(1->5)-alpha-L-arabinanase, endo-1,5-alpha-arabinanase, endo-1,5-alpha-L-arabinanase, endo-1,5-alpha-L-arabinase, endo-1,5-alpha-L-arabinase A, endo-1,5-arabinanase, endo-1,5-arabinase, endo-ABA, endo-alpha-(1->5)-L-arabinanase, endo-alpha-1,5-arabanase, endo-alpha-1,5-L-arabinanase, endo-alpha-arabinanase, endo-ara, endo-arabanase, endo-arabinanase, endo-arabinase, endo-D-arabinase, endo-L-arabinanase, endoarabinanase, endoarabinase, GH43 arabinanase, GH43 endo-arabinanase, More, PPase-C, protopectinase C, protopectinase-C, Tpet_0637

ECTree

     3 Hydrolases
         3.2 Glycosylases
             3.2.1 Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
                3.2.1.99 arabinan endo-1,5-alpha-L-arabinanase

pH Range

pH Range on EC 3.2.1.99 - arabinan endo-1,5-alpha-L-arabinanase

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pH RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
3 - 8
the enzyme shows 30%, 55%, 100%, 70%, 15% and less than 5% activity at pH 3.0, 4.0, 5.0, 6.0, 7.0, and 8.0, respectively
3 - 9
-
IFO 3022
3.5 - 5
pH 3.5: about 45% of maximal activity, pH 5.0: about 50% of maximal activity
4 - 10
-
IFO 3134
4 - 7
the enzyme retains more than 75% activity over a pH range from 4.0 to 7.0
5 - 6.5
activity is markedly reduced to about 50% at pH 5.0 and at pH 6.5, respectively
5 - 7
the enzyme achieves about 20.4 and 83.6% of the maximal activity at pH 5.0 and 7.0, respectively
5 - 8
arabinanase activity drops to about 55% and 70% of the highest activity at pH 5.0 and 8.0, respectively
5 - 8.5
-
pH 5.0: about 65% of maximal activity, pH 8.5: about 40% of maximal activity
5.5 - 7.5
7 - 9
pH 7.0: about 55% of maximal activity, pH 9.0: about 20% of maximal activity