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3.2.1.37: xylan 1,4-beta-xylosidase

This is an abbreviated version!
For detailed information about xylan 1,4-beta-xylosidase, go to the full flat file.

Word Map on EC 3.2.1.37

Reaction

(Xylbeta(1-4))x
+
H2O
=
beta-D-xylopyranose
 +
(Xylbeta(1-4))x-1

Synonyms

1,4-beta-D-xylan xylohydrolase, 1,4-beta-D-xylosidase, 1.4-beta-D-xylanase, exo-type, ABF3, AbfA, AbfB, AbXyl, alpha-arabinofuranosidase/beta-xylosidase, alpha-L-arabinofuranosidase, alpha-L-arabinofuranosidase 3, alpha-L-arabinofuranoside arabinofuranohydrolase, arabinofuranosidase 3, AXH-d3, Axy43A, BcXyl, beta-1,4-xylosidase, beta-D-xylopyranosidase, beta-D-xylosidase, beta-D-xylosidase/alpha-L-arabinofuranosidase, beta-D-xyloside xylohydrolase, beta-glucosidase/xylosidase, beta-xylosidase, beta-xylosidase A, beta-xylosidase B, beta-xylosidase I, beta-xylosidase II, beta-xylosidase-1, beta-xylosidase-2, beta-xylosidase-3, beta-xylosidase-4, betaXTE, betaXTR, bifunctional beta-glucosidase/xylosidase, BlxA, Bxl1, BxTW1, Bxyl, ccxyl3a, EcXyl43 beta-xylosidase, exo-1,4-beta-D-xylosidase, exo-1,4-beta-xylosidase, Exo-beta-(1,4)-xylanase, GH43 beta-1,4-xylosidase, GH43 xylosidase, GH43B6, glycoside hydrolase family 3 beta-xylosidase, More, Pae1263, RrXyl43A, Rubg3A, Rubg3B, RuBGX1, RuXyn1, SSO3032, Sxa, Thxyl43A, Tpexyl3, X12345, Xln-DT, Xyl, Xyl I, XYL1, Xyl3A, XYL4, xyl43, xyl43A, Xyl43C, Xyl5, XYLA, Xylan 1,4-beta-xylosidase, xylanase, XylB, XylC, XylCD2, xylobiase, xylosidase, XynB, XynB2, XynB3

ECTree

     3 Hydrolases
         3.2 Glycosylases
             3.2.1 Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
                3.2.1.37 xylan 1,4-beta-xylosidase

pH Range

pH Range on EC 3.2.1.37 - xylan 1,4-beta-xylosidase

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pH RANGE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
2.2 - 5.5
about 95% activity at pH 2.2, 100% activity at pH 3.0, about 90% activity at pH 4.0, about 55% activity at pH 5.5, about 42% activity at pH 6.0, about 12% activity at pH 7.0
3 - 6
-
about 60% activity at pH 3.0, about 80% activity at pH 4.0, 100% activity at pH 4.5, about 90% activity at pH 5.0, about 45% activity at pH 6.0
3.4 - 5.5
-
over 69% of maximum activity is observed in the pH range 3.4 to 5.5
3.5 - 4.5
-
pH 3.5: 73% of maximal activity, pH 4.5: 78% of maximal activity
3.8 - 5
-
the enzyme retains more than 90% of its maximum activity at a pH range from pH 3.8 to pH 4.3 at 50°C. At pH 5.0 the enzyme maintains about 60% of its maximal activity
4 - 10.6
the enzyme is notably active at pH 4-6 and pH 9-10. At pH 8.0 about 65% and 90% relative activity is detected in citrate buffer and borate buffer respectively. At pH 8.6 and 9.0 less than 65% relative activity is observed in borate buffer, while more than 85% is found in Gly-NaOH buffer. More than 60% relative activity is noted at pH 10.6
4 - 6
4 - 8
-
fully active, beta-xylosidase A
4.1 - 6.4
-
50% activity at pH 4.1 and 6.4
4.5
-
50% residual activity
4.5 - 6
-
pH 4.5: about 65% of maximal activity, pH 6.0: about 40% of maximal activity
4.5 - 7
4.5 - 7.5
-
the activity drops sharply below pH 4.5 and above pH 7.0
5
65% residual activity
5 - 6.6
-
high activity within
5 - 8
5 - 9
5.5
-
50% residual activity
5.5 - 7.5
pH 5.5: about 60% of maximal activity, pH 7.5: about 50% of maximal activity, enzyme entrapped in calcium alginate beads
6 - 7
6 - 7.5
less than 10% of maximal activity at pH 5.5, pH 6.0: maximal activity, pH 7.5: about 60% of maximal activity, soluble enzyme
6 - 8
-
more than 90% of maximum activity
6 - 9
the enzyme retains 76.35% and 55.85% of catalytic activities at pH 6.0 and 9.0, respectively
6.8 - 8
at pH values ranging from pH 6.8 to 8.0, the relative activities are preserved at levels greater than 80%
7 - 9
more than 60% of maximum activity
additional information
pH profiles, wild-type and mutant enzymes, overview