ID   3.2.1.156
DE   oligosaccharide reducing-end xylanase.
AN   reducing end xylose-releasing exo-oligoxylanase.
AN   Rex.
CA   Hydrolysis of (1->4)-beta-D-xylose residues from the reducing end of
CA   oligosaccharides.
CC   -!- The enzyme, originally isolated from the bacterium Bacillus
CC       halodurans C-125, releases the xylose unit at the reducing end of
CC       oligosaccharides ending with the structure beta-D-xylopyranosyl-
CC       (1->4)-beta-D-xylopyranosyl-(1->4)-beta-D-xylopyranose, leaving the
CC       new reducing end in the alpha configuration.
CC   -!- It is specific for the beta anomers of xylooligosaccharides whose
CC       degree of polymerization is equal to or greater than 3.
CC   -!- The penultimate residue must be beta-D-xylopyranose, but replacing
CC       either of the flanking residues with glucose merely slows the rate
CC       greatly.
DR   A1A048, REOX_BIFAA ;  Q9KB30, REOX_HALH5 ;  A0A0S2UQQ5, REX8A_PAEBA;
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