IUBMB Enzyme Nomenclature

EC 3.2.1.77

Accepted name: mannan 1,2-(1,3)-α-mannosidase

Reaction: Hydrolysis of (1→2)- and (1→3)-linkages in yeast mannan, releasing mannose

Other name(s): exo-1,2-1,3-α-mannosidase; 1,2-1,3-α-D-mannan mannohydrolase

Systematic name: (1→2)-(1→3)-α-D-mannan mannohydrolase

Comments: A 1,6-α-D-mannan backbone remains after action on yeast mannan. This is further attacked, but slowly.

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, CAS registry number: 37288-53-2

References:

1. Jones, G.H. and Ballou, C.E. Studies on the structure of yeast mannan. I. Purification and some properties of an α-mannosidase from an Arthrobacter species. J. Biol. Chem. 244 (1969) 1043-1051. [PMID: 5769177]

2. Jones, G.H. and Ballou, C.E. Studies on the structure of yeast mannan. II. Mode of action of the Arthrobacter α-mannosidase on yeast mannan. J. Biol. Chem. 244 (1969) 1052-1059. [PMID: 5814027]

[EC 3.2.1.77 created 1972]


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