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ENZYME entry: EC

Accepted Name
Xyloglucan-specific exo-beta-1,4-glucanase.
Reaction catalysed
Hydrolysis of (1->4)-D-glucosidic linkages in xyloglucans so as to successively remove oligosaccharides from the chain end
  • The enzyme removes XXXG heptasaccharides, XXLG/XLXG octasaccharides and XLLG nonasaccharides from the end of tamarind seed xyloglucan polymers in a processive manner.
  • Hydrolysis occurs at the unsubstituted D-glucopyranose residue in the main backbone.
  • It is not known whether the cleavage takes place at the reducing or non-reducing end of the polymer.
  • Very low activity with beta-D-glucans.
  • The enzyme from Chrysosporium lucknowense shifts to an endoglucanase mode when acting on linear substrates without bulky substituents on the polymeric backbone such as barley beta-glucan.
  • Formerly EC
PRIAM enzyme-specific profiles3.2.1.155
KEGG Ligand Database for Enzyme Nomenclature3.2.1.155
IUBMB Enzyme Nomenclature3.2.1.155
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