:Oligosaccharide reducing-end xylanase

{{Short description|Enzyme}}

{{Infobox enzyme

| Name = Oligosaccharide reducing-end xylanase

| EC_number = 3.2.1.156

| CAS_number = 879497-03-7

| GO_code =

| image =

| width =

| caption =

}}

Oligosaccharide reducing-end xylanase ({{EC number|3.2.1.156}}, Rex, reducing end xylose-releasing exo-oligoxylanase) is an enzyme with systematic name beta-D-xylopyranosyl-(1->4)-beta-D-xylopyranose reducing-end xylanase.{{cite journal | vauthors = 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 = The Journal of Biological Chemistry | volume = 279 | issue = 53 | pages = 55097–103 | date = December 2004 | pmid = 15491996 | doi = 10.1074/jbc.m409832200 | doi-access = free }}{{cite journal | vauthors = 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 = The Journal of Biological Chemistry | volume = 280 | issue = 17 | pages = 17180–6 | date = April 2005 | pmid = 15718242 | doi = 10.1074/jbc.m413693200 | doi-access = free}} This enzyme catalyses the following chemical reaction

: Hydrolysis of (1->4)-beta-D-xylose residues from the reducing end of oligosaccharides

The enzyme acts rapidly on the beta-anomer of beta-D-xylopyranosyl-(1->4)-beta-D-xylopyranose.