Mannan 1,2-(1,3)-α-mannosidase

{{Short description|Class of enzymes}}

{{Infobox enzyme

| Name = Mannan 1,2-(1,3)-α-mannosidase

| EC_number = 3.2.1.77

| CAS_number = 37288-53-2

| GO_code =

| image =

| width =

| caption =

}}

Mannan 1,2-(1,3)-α-mannosidase ({{EnzExplorer|3.2.1.77}}, exo-1,2-1,3-α-mannosidase, 1,2-1,3-α-D-mannan mannohydrolase) is an enzyme with systematic name (1→2)-(1→3)-α-D-mannan mannohydrolase.{{cite journal | vauthors = Jones GH, Ballou CE | title = Studies on the structure of yeast mannan. I. Purification and some properties of an α-mannosidase from an Arthrobacter species | journal = The Journal of Biological Chemistry | volume = 244 | issue = 3 | pages = 1043–51 | date = February 1969 | pmid = 5769177 }}{{cite journal | vauthors = Jones GH, Ballou CE | title = Studies on the structure of yeast mannan. II. Mode of action of the Arthrobacter α-mannosidase on yeast mannan | journal = The Journal of Biological Chemistry | volume = 244 | issue = 3 | pages = 1052–9 | date = February 1969 | pmid = 5814027 }} It catalyses the hydrolysis of (1→2)- and (1→3)-linkages in yeast mannan, releasing mannose.

A 1,6-α-D-mannan backbone remains after action on yeast mannan.