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Entry
EC 3.2.1.156                Enzyme                                 

Name
oligosaccharide reducing-end xylanase;
Rex;
reducing end xylose-releasing exo-oligoxylanase
Class
Hydrolases;
Glycosylases;
Glycosidases, i.e. enzymes that hydrolyse O- and S-glycosyl compounds
BRITE hierarchy
Sysname
beta-D-xylopyranosyl-(1->4)-beta-D-xylopyranose reducing-end xylanase
Reaction(IUBMB)
Hydrolysis of (1->4)-beta-D-xylose residues from the reducing end of oligosaccharides
Comment
The enzyme, originally isolated from the bacterium Bacillus halodurans C-125, releases the xylose unit at the reducing end of oligosaccharides ending with the structure beta-D-xylopyranosyl-(1->4)-beta-D-xylopyranosyl-(1->4)-beta-D-xylopyranose, leaving the new reducing end in the alpha configuration. It is specific for the beta anomers of xylooligosaccharides whose degree of polymerization is equal to or greater than 3.
The penultimate residue must be beta-D-xylopyranose, but replacing either of the flanking residues with glucose merely slows the rate greatly.
History
EC 3.2.1.156 created 2005
Orthology
K15531  
oligosaccharide reducing-end xylanase
Genes
PSU: 
PSUW: 
PBW: 
LAL: 
TTU: 
SCL: 
sce3034(xynA1) sce3220(xynB1)
SCU: 
BLH: 
BHA: 
BCO: 
AXL: 
PJD: 
PMS: 
PMQ: 
PMW: 
PBD: 
PGM: 
POD: 
PAEN: 
PAEF: 
PAEQ: 
PAEA: 
PAEH: 
PAEJ: 
PRI: 
TCO: 
LLK: 
LLS: 
LLD: 
LLX: 
LLC: 
LLM: 
LLN: 
LLI: 
LLW: 
LLJ: 
CCB: 
CLB: 
CSR: 
CCE: 
RAL: 
BPB: 
bpr_I1513(xyn8A)
BFI: 
CLE: 
RHO: 
RIX: 
RIM: 
CPY: 
HSD: 
ERE: 
ERT: 
ERA: 
MAS: 
BLL: 
BLX: 
BAD: 
BADL: 
BADO: 
BKS: 
BANG: 
BCAT: 
BPSC: 
ATM: 
OTE: 
SCD: 
FSC: 
BCEL: 
PPN: 
PRU: 
DOI: 
CHU: 
SLI: 
FAE: 
RTI: 
FBT: 
FJO: 
 » show all
Taxonomy
Reference
1  [PMID:15491996]
  Authors
Honda Y, Kitaoka M.
  Title
A family 8 glycoside hydrolase from Bacillus halodurans C-125 (BH2105) is a reducing end xylose-releasing exo-oligoxylanase.
  Journal
J. Biol. Chem. 279 (2004) 55097-103.
  Sequence
[bha:BH2105]
Reference
2  [PMID:15718242]
  Authors
Fushinobu S, Hidaka M, Honda Y, Wakagi T, Shoun H, Kitaoka M.
  Title
Structural basis for the specificity of the reducing end xylose-releasing exo-oligoxylanase from Bacillus halodurans C-125.
  Journal
J. Biol. Chem. 280 (2005) 17180-6.
  Sequence
[bha:BH2105]
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
879497-03-7

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